ETSI TS V3.5.1 ( )

Transcription

1 TECHNCAL SECFCATON GEO-Mobile Radio nterface Specifications (Release 3); Third Generation Satellite acket Radio Service; art 5: Radio interface physical layer specifications; Sub-part 2: Multiplexing and Multiple Access; Stage 2 Service Description; GMR-1 3G

2 2 Reference RTS/SES Keywords 3G, GMRS, GMR, GRS, GSM, GSO, interface, MES, mobile, MSS, MX, radio, satellite, S-CN, TDMA 650 Route des Lucioles F Sophia Antipolis Cedex - FRANCE Tel.: Fax: Siret N NAF 742 C Association à but non lucratif enregistrée à la Sous-réfecture de Grasse (06) N 7803/88 mportant notice The present document can be downloaded from: The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified without the prior written authorization of. n case of any existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of the ortable Document Format (DF) version kept on a specific network drive within Secretariat. sers of the present document should be aware that the document may be subject to revision or change of status. nformation on the current status of this and other documents is available at f you find errors in the present document, please send your comment to one of the following services: Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of. The content of the DF version shall not be modified without the written authorization of. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards nstitute All rights reserved. DECT TM, LGTESTS TM, MTS TM and the logo are Trade Marks of registered for the benefit of its Members. 3G TM and LTE are Trade Marks of registered for the benefit of its Members and of the 3G Organizational artners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association.

3 3 Contents ntellectual roperty Rights... 7 Foreword... 7 Modal verbs terminology... 8 ntroduction Scope References Normative references nformative references Definitions and abbreviations Definitions Abbreviations General Logical channels General Traffic channels General Speech traffic channels Data traffic channels Summary of traffic channel characteristics acket Data Traffic CHannels (DTCH) (A/Gb mode only) a acket Data Traffic Channels (DTCH3) (u mode only) acket Mode Dedicated Channels (u mode only) Control channels General Broadcast channels Frequency Correction CHannel (FCCH) GS Broadcast control CHannel (GBCH) Broadcast Control CHannel (BCCH) Common Control Channel (CCCH) Dedicated control channels Cell Broadcast CHannel (CBCH) acket Common Control CHannels (CCCH) acket dedicated control channels The physical resource General Radio frequency channels Spot beam allocation Downlink and uplink Timeslots and TDMA frames General Timeslot number TDMA frame number Bursts General Timing Half-symbol period seful duration Guard period Multiple unique word patterns in bursts Types of bursts General BACH burst... 18

4 General BACH3 burst BCCH burst CCH burst DC2 burst DC6 burst DKAB bursts General KAB3 burst FCCH burst General FCCH3 burst NT3 burst General NT3 burst for encoded speech NT3 burst for FACCH NT6 burst NT9 burst RACH burst General RACH3 burst SDCCH burst acket Normal Bursts (NB) General Burst header General Guard bits nique Word (W) blic nformation () field Transition symbols Encoded Rivate nformation (R) Formats of packet normal burst General Void NB(4,3) NB(5,3) NB(1,6) NB(2,6) LDC coded NB2(5,12)/Downlink LDC coded NB2(5,12)/plink LDC coded NB2(5,3)/Downlink LDC coded NB2(5,3)/plink NB3(5,12)/plink NB3(5,12)/Downlink NB3(5,3)/plink NB3(5,3)/Downlink NB3(10,3) Downlink NB3(1,3) Burst NB3(1,6) burst NB3(1,8) burst NB3(2,6) acket Access Burst (AB) acket Keep-Alive Burst (KAB) DC12 burst Logical-physical channel mapping General Abstract Frequency-domain description Time-domain description hysical channels Logical channels... 44

5 5 8.2 hysical Channel (C) types and names Logical channel parameters ermitted channel configurations Logical channel frame sequencing concepts General Simple frame sequence General Simple frame sequence subchannels Simple paired-frame sequence General Simple paired-frame sequence subchannels Configured paired-frame sequence (A/Gb mode only) General CBCH configuration a CBCH configuration (u mode only) Statistically multiplexed paired-frame sequence (A/Gb mode only) General ool size Statistically multiplexed paired-frame sequence subchannels Example using SDCCH System information cycle sequencing General hysical-channel-relative Timeslot Number (CRTN) System-nformation-Relative Frame Number (SRFN) Graphical representation of system information cycle timeslots Mapping of logical channels to BCCH/CCCH General Fixed reserved-slot logical channels General FCCH a FCCH CCH BCCH Optional reserved-slot logical channels General CH BACH nreserved-slot logical channels Mapping of CBCH (u mode) Mapping of logical channels to normal CCCH a Mapping of logical channels to S extended/agch/ccch (u mode only) Mapping in time of packet logical channels onto physical channels General Mapping of the uplink channels Mapping of uplink packet traffic channel (DTCH/) and ACCH/ Mapping of the packet timing advance control channel (TCCH/) (A/Gb mode only) Mapping of the uplink CCCH, i.e. RACH (A/Gb mode only) a Mapping of the uplink CCCH, i.e. RACH3 (u mode only) Mapping of the downlink channels Mapping of the (DTCH/D) and ACCH/D Mapping of the TCCH/D (A/Gb mode only) Mapping of the BCCH Mapping of the CCCH Mapping of BCCH data ermitted combination of packet data channels Multislot configurations General Multislot configurations for circuit switched connections Multislot configurations for connections Operation of channels General... 54

6 6 9.1 C6d and C12u pairing a C12d and C12u pairing Bidirectional channel timeslot assignments GBCH a GBCH DKABs FCCH and CCH TACCH/ MES monitoring of paging and alerting groups General Determination of assigned CCCH Determination of assigned paging group Determination of alerting group Determination of CCCH_GRO and AGNG_GRO for MES in GMRS attached mode MES selection of C SDCCH vs. CBCH MES monitors paired CCCH for AGCH Additional air interface constraints BCCH parameters General Types of BCCH parameters nformation used to obtain synchronization Channel meta-information Beam-configurable multichannel information nformation specific to one instance of a channel Annex A (normative): Multislot capability A.1 MES classes for multislot capability A.2 Constraints imposed by the service selected A.3 Network requirements for supporting MES multislot classes Annex B (informative): Annex C (normative): Annex D (informative): Asymmetrical pairing of DCH/D(2,m) with DCH/(1,m) GMR-1 3G Terminal Types Bibliography History... 79

7 7 ntellectual roperty Rights Rs essential or potentially essential to the present document may have been declared to. The information pertaining to these essential Rs, if any, is publicly available for members and non-members, and can be found in SR : "ntellectual roperty Rights (Rs); Essential, or potentially Essential, Rs notified to in respect of standards", which is available from the Secretariat. Latest updates are available on the Web server ( ursuant to the R olicy, no investigation, including R searches, has been carried out by. No guarantee can be given as to the existence of other Rs not referenced in SR (or the updates on the Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Specification (TS) has been produced by Technical Committee Satellite Earth Stations and Systems (SES). The contents of the present document are subject to continuing work within TC-SES and may change following formal TC-SES approval. Should TC-SES modify the contents of the present document it will then be republished by with an identifying change of release date and an increase in version number as follows: Version 3.m.n where: the third digit (n) is incremented when editorial only changes have been incorporated in the specification; the second digit (m) is incremented for all other types of changes, i.e. technical enhancements, corrections, updates, etc. The present document is part 5, sub-part 2 of a multi-part deliverable covering the GEO-Mobile Radio nterface Specifications (Release 3); Third Generation Satellite acket Radio Service, as identified below: art 1: art 2: art 3: art 4: art 5: "General specifications"; "Service specifications"; "Network specifications"; "Radio interface protocol specifications"; "Radio interface physical layer specifications": Sub-part 1: Sub-part 2: Sub-part 3: Sub-part 4: Sub-part 5: Sub-part 6: Sub-part 7: "hysical Layer on the Radio ath: General Description"; "Multiplexing and Multiple Access; Stage 2 Service Description"; "Channel Coding"; "Modulation"; "Radio Transmission and Reception"; "Radio Subsystem Link Control"; "Radio Subsystem Synchronization"; art 6: art 7: "Speech coding specifications"; "Terminal adaptor specifications".

8 8 Modal verbs terminology n the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and "cannot" are to be interpreted as described in clause 3.2 of the Drafting Rules (Verbal forms for the expression of provisions). "must" and "must not" are NOT allowed in deliverables except when used in direct citation. ntroduction GMR stands for GEO (Geostationary Earth Orbit) Mobile Radio interface, which is used for Mobile Satellite Services (MSS) utilizing geostationary satellite(s). GMR is derived from the terrestrial digital cellular standard GSM and supports access to GSM core networks. The present document is part of the GMR Release 3 specifications. Release 3 specifications are identified in the title and can also be identified by the version number: Release 1 specifications have a GMR 1 prefix in the title and a version number starting with "1" (V1.x.x). Release 2 specifications have a GMRS 1 prefix in the title and a version number starting with "2" (V2.x.x). Release 3 specifications have a GMR-1 3G prefix in the title and a version number starting with "3" (V3.x.x). The GMR release 1 specifications introduce the GEO Mobile Radio interface specifications for circuit mode Mobile Satellite Services (MSS) utilizing geostationary satellite(s). GMR release 1 is derived from the terrestrial digital cellular standard GSM (phase 2) and it supports access to GSM core networks. The GMR release 2 specifications add packet mode services to GMR release 1. The GMR release 2 specifications introduce the GEO Mobile acket Radio Service (GMRS). GMRS is derived from the terrestrial digital cellular standard GRS (included in GSM hase 2+) and it supports access to GSM/GRS core networks. The GMR release 3 specifications evolve packet mode services of GMR release 2 to 3rd generation MTS compatible services. The GMR release 3 specifications introduce the GEO-Mobile Radio Third Generation (GMR-1 3G) service. Where applicable, GMR-1 3G is derived from the terrestrial digital cellular standard 3G and it supports access to 3G core networks. Due to the differences between terrestrial and satellite channels, some modifications to the GSM or 3G standard are necessary. Some GSM and 3G specifications are directly applicable, whereas others are applicable with modifications. Similarly, some GSM and 3G specifications do not apply, while some GMR specifications have no corresponding GSM or 3G specification. Since GMR is derived from GSM and 3G, the organization of the GMR specifications closely follows that of GSM or 3G as appropriate. The GMR numbers have been designed to correspond to the GSM and 3G numbering system. All GMR specifications are allocated a unique GMR number. This GMR number has a different prefix for Release 2 and Release 3 specifications as follows: where: Release 1: GMR n xx.zyy. Release 2: GMRS n xx.zyy. Release 3: GMR-1 3G xx.zyy. - xx.0yy (z = 0) is used for GMR specifications that have a corresponding GSM or 3G specification. n this case, the numbers xx and yy correspond to the GSM or 3G numbering scheme. - xx.2yy (z = 2) is used for GMR specifications that do not correspond to a GSM or 3G specification. n this case, only the number xx corresponds to the GSM or 3G numbering scheme and the number yy is allocated by GMR. - n denotes the first (n = 1) or second (n = 2) family of GMR specifications.

9 9 A GMR system is defined by the combination of a family of GMR specifications and GSM and 3G specifications as follows: f a GMR specification exists it takes precedence over the corresponding GSM or 3G specification (if any). This precedence rule applies to any references in the corresponding GSM or 3G specifications. NOTE: Any references to GSM or 3G specifications within the GMR specifications are not subject to this precedence rule. For example, a GMR specification may contain specific references to the corresponding GSM or 3G specification. f a GMR specification does not exist, the corresponding GSM or 3G specification may or may not apply. The applicability of the GSM or 3G specifications is defined in TS [2]. The clause numbering and the table numbering and figure numbering in the present document are aligned to the corresponding numbering of TS (Release 1) [10] as far as possible. n several places, this means that the table numbering and figure numbering is non-continuous in the present document in order to maintain this alignment, the following rules apply: A table that uses the same table number replaces the corresponding table in TS (Release 1) [10]. A table that uses a different table number is a new additional table.

10 10 1 Scope The present document defines the structure of the physical channels for the radio subsystem in the GMR-1 3G Mobile Satellite System. t describes the GMR-1 3G concept of logical channels and the timing concepts of TDMA frames, timeslots, and bursts. t defines the relationship between logical and physical channels, and defines the logical channels in terms of size, structure and timing relationships. 2 References 2.1 Normative references References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at NOTE: While any hyperlinks included in this clause were valid at the time of publication, cannot guarantee their long term validity. The following referenced documents are necessary for the application of the present document. n the case of a reference to a 3G document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in Release 7 or to the latest version of that document in the latest release less than 7. n the case of a reference to a GMR-1 3G document, a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document. [1] TS : "GEO-Mobile Radio nterface Specifications (Release 2) General acket Radio Service; art 1: General specifications; Sub-part 1: Abbreviations and acronyms; GMRS ". NOTE: This is a reference to a GMR-1 Release 2 specification. See the introduction for more details. [2] TS : "GEO-Mobile Radio nterface Specifications (Release 3); Third Generation Satellite acket Radio Service; art 1: General specifications; Sub-part 2: ntroduction to the GMR-1 family; GMR-1 3G ". [3] TS : "GEO-Mobile Radio nterface Specifications (Release 3); Third Generation Satellite acket Radio Service; art 4: Radio interface protocol specifications; Sub-part 8: Mobile Radio nterface Layer 3 Specifications; GMR-1 3G ". [4] TS : "GEO-Mobile Radio nterface Specifications (Release 3); Third Generation Satellite acket Radio Service; art 5: Radio interface physical layer specifications; Sub-part 3: Channel Coding; GMR-1 3G ". [5] TS : "GEO-Mobile Radio nterface Specifications (Release 3); Third Generation Satellite acket Radio Service; art 5: Radio interface physical layer specifications; Sub-part 4: Modulation; GMR-1 3G ". [6] TS : "GEO-Mobile Radio nterface Specifications (Release 3); Third Generation Satellite acket Radio Service; art 5: Radio interface physical layer specifications; Sub-part 5: Radio Transmission and Reception; GMR-1 3G ". [7] TS : "GEO-Mobile Radio nterface Specifications (Release 3); Third Generation Satellite acket Radio Service; art 5: Radio interface physical layer specifications; Sub-part 7: Radio Subsystem Synchronization; GMR-1 3G ".

11 11 [8] TS : "GEO-Mobile Radio nterface Specifications (Release 3); Third Generation Satellite acket Radio Service; art 3: Network specifications; Sub-part 22: Overall description of the GMRS radio interface; Stage 2; GMR-1 3G ". [9] TS : "GEO-Mobile Radio nterface Specifications (Release 3); Third Generation Satellite acket Radio Service; art 4: Radio interface protocol specifications; Sub-part 12: Mobile Earth Station (MES) - Base Station System (BSS) interface; Radio Link Control/Medium Access Control (RLC/MAC) protocol; GMR-1 3G ". [10] TS : "GEO-Mobile Radio nterface Specifications; art 5: Radio interface physical layer specifications; Sub-part 2: Multiplexing and Multiple Access; Stage 2 Service Description; Sub-part 2: Multiplexing and Multiple Access; Stage 2 Service Description; GMR ". NOTE: This is a reference to a GMR-1 Release 1 specification. See the introduction for more details. 2.2 nformative references References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. NOTE: While any hyperlinks included in this clause were valid at the time of publication, cannot guarantee their long term validity. The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. Not applicable. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in GMR-1 3G [2] apply. 3.2 Abbreviations For the purposes of the present document, the abbreviations given in GMRS [1] apply. 4 General Same as clause 4 in TS [10]. 5 Logical channels 5.1 General Same as clause 5.1 in TS [10].

12 Traffic channels General TCHs are intended to carry either encoded speech or user data. Three general types of traffic channels are defined: 1) TCH3: This channel carries data at a gross rate of 5,20 kbps. 2) TCH6: This channel carries data at a gross rate of 10,75 kbps. 3) TCH9: This channel carries data at a gross rate of 16,45 kbps. The data gross rate is defined as the number of encoded bits in NT3, NT6 and NT9 burst, respectively, excluding the number of power control bits, divided by 40 ms frame time. All traffic channels are bidirectional. The types of traffic channels capable of speech and user data are identified in the following clauses Speech traffic channels Same as clause in TS [10] Data traffic channels Same as clause in TS [10] Summary of traffic channel characteristics Table 5.1 summarizes the characteristics of traffic channels, where the gross transmission rate is the channel transmission bit rate (2 times channel transmission symbol rate) multiplied by the duty cycle of the channel. Table 5.1: Summary of traffic channel characteristics Channel type ser information capability Gross transmission rate TCH3 Encoded speech 5,85 kbps (= 46,8 / 8) TCH6 ser data: 4,8 kbps 11,70 kbps (= 46,8 / 8 x 2) Fax: 2 kbps, 4 kbps or 4,8 kbps TCH9 ser data: 9,6 kbps Fax: 2 kbps, 4 kbps, 4,8 kbps, or 9,6 kbps 17,55 kbps (= 46,8 / 8 x 3) acket Data Traffic CHannels (DTCH) (A/Gb mode only) The following acket Data Traffic CHannels (DTCH) apply to A/Gb mode. A DTCH corresponds to the resource allocated to a single MES on one physical channel for user data transmission. Different logical channels may be dynamically multiplexed on to the same DTCH. The DTCH uses π/2-bsk, π/4-qsk,16 ASK, or 32 ASK modulation. All packet data traffic channels are unidirectional, either uplink (DTCH/), for a mobile-originated packet transfer or downlink (DTCH/D) for a mobile-terminated packet transfer. DTCH and DTCH2 traffic data channels may be multiplexed on the same physical carrier. DTCHs are used to carry packet data traffic. Different DTCHs are defined by the suffix (m,n) where m indicates the bandwidth of the physical channel in which the DTCH is mapped, m 31,25 khz, and n defines the number of timeslots allocated to this physical channel. Table 5.2 summarizes different types of packet traffic data channels, DTCH (m, 3), (m = 4 and 5), where the burst duration is 5 ms, DTCH (m, 6), (m = 1, 2), where the burst duration is 10 ms, and DTCH (m, 12), (m = 5), where the burst duration is 20 ms.

13 13 Channels Table 5.2: acket Traffic Data Channels (eak Transmission Rates) Direction (: plink, D: Downlink) Transmission symbol rate (ksps) Channel Coding Modulation eak payload transmission rate (without CRC) (kbps) eak payload transmission rate (with CRC) (kbps) DTCH(4,3) /D 93,6 Conv. π/4-qsk 113,6 116,8 DTCH(5,3) /D 117,0 Conv. π/4-qsk 145,6 148,8 DTCH(1,6) 23,4 Conv. π/4-qsk 27,2 28,8 DTCH(2,6) D 46,8 Conv. π/4-qsk 62,4 64,0 DTCH2(5,12) D 117,0 LDC π/4-qsk 199,2 199,6 DTCH2(5,12) D 117,0 LDC 16-ASK 354,8 355,2 DTCH2(5,12) D 117,0 LDC 32-ASK 443,6 444,0 DTCH2(5,12) 117,0 LDC π/4-qsk 199,2 199,6 DTCH2(5,12) 117,0 LDC 16-ASK 399,2 399,6 DTCH2(5,3) /D 117,0 LDC π/4-qsk 169,6 171,2 DTCH2(5,3) /D 117,0 LDC 16-ASK 342,4 344,0 DTCH2(5,3) /D 117,0 LDC 32-ASK 380,8 382,4 The payload is the rivate nformation (R) delivered to the physical layer by the link layer. The R includes the MAC header and the other higher layer overhead. The peak payload transmission rate (without CRC) is defined as the maximum attainable R data rate with continuous transmission, i.e. using all 24 timeslots in a frame. The above peak-rates are achieved with rate 3/4 coding for DTCH(4,3) and DTCH(5,3) and are achieved with rate 4/5 for DTCH(1,6) and DTCH(2,6). The peak rates of LDC coded DTCH2(5,12) and LDC coded DTCH2(5,3) are achieved for different modulation schemes with the following coding rate combinations: Downlink: 32 ASK Rate 4/5, 16 ASK Rate 4/5, π/4-qsk Rate 9/10. plink: 16 ASK Rate 9/10, π/4-qsk Rate 9/10. NOTE: 5.2.5a All the above coding rates are approximate rates. Refer to TS [4] for the exact coding rates. acket Data Traffic Channels (DTCH3) (u mode only) The following acket Data Traffic Channels3 (DTCH3) apply to u mode. A DTCH3 corresponds to the resource allocated to a single MES on one physical channel for user data transmission. Different logical channels may be dynamically multiplexed on to the same DTCH3. The DTCH3 uses π/2-bsk, π/4-qsk,16 ASK, or 32 ASK modulation. All packet data traffic channels are unidirectional, either uplink (DTCH3/), for a mobile-originated packet transfer or downlink (DTCH3/D) for a mobile-terminated packet transfer. DTCH3 may not be multiplexed with DTCH and DTCH2 on the same physical carrier.

14 14 DTCH3s are used to carry packet data traffic. Different DTCH3s are defined by the suffix (m,n) where m indicates the bandwidth of the physical channel in which the DTCH3 is mapped, m 31,25 khz, and n defines the number of timeslots allocated to this physical channel. Table 5.3 summarizes different types of packet traffic data channels, DTCH3(m, 3), (m = 1, 5 and 10), where the burst duration is 5 ms, DTCH3(m, 6), (m = 1, 2), where the burst duration is 10 ms, and DTCH3(m, 12), (m = 5), where the burst duration is 20 ms. Channels Table 5.3: acket Traffic Data Channels (eak Transmission Rates) Direction (: plink, D: Downlink) Transmission symbol rate (ksps) Channel Coding Modulation eak payload transmission rate (without CRC) (kbps) eak payload transmission rate (with CRC) (kbps) DTCH3(1,6) /D 23,4 Conv. π/4-qsk 27,2 28,8 DTCH3(2,6) /D 46,8 Conv. π/4-qsk 62,4 64,0 DTCH3(2,6) /D 46,8 Turbo π/4-qsk 62,4 64,0 DTCH3(5,3) /D 117,0 Turbo π/4-qsk 156,8 160,0 DTCH3(5,3) D 117,0 Turbo 16-ASK 252,8 256,0 DTCH3(5,12) /D 117,0 Turbo π/4-qsk 185,2 186,0 DTCH3(5,12) /D 117,0 Turbo 16-ASK 256,8 258,4 DTCH3(5,12) D 117,0 Turbo 16-ASK 294,4 296,0 DTCH3(10,3) D 234,0 Turbo π/4-qsk 344,0 347,2 DTCH3(10,3) D 234,0 Turbo 16-ASK 587,2 590,4 The payload is the rivate nformation (R) delivered to the physical layer by the link layer. The R includes the MAC header and the other higher layer overhead. The peak payload transmission rate (without CRC) is defined as the maximum attainable R data rate with continuous transmission, i.e. using all 24 timeslots in a frame. The above peakrates are achieved with rate 4/5 for DTCH3(1,6) and DTCH3(2,6). The peak rates of Turbo coded DTCH3(5,12) and DTCH3(5,3) are achieved for different modulation schemes with the following coding rate combinations: Downlink: 16 ASK Rate 2/3, π/4-qsk Rate 5/6. plink: 16 ASK Rate 4/7, π/4-qsk Rate 5/6. The peak rates of Turbo coded DTCH3(10,3) are achieved for different modulation schemes with the following coding rate combinations: Downlink: 16 ASK Rate 2/3, π/4-qsk Rate 5/ acket Mode Dedicated Channels (u mode only) The following acket Mode Dedicated CHannels apply to u mode. A Dedicated Traffic Channel (DTCH) is used to carry user traffic when a dedicated channel (DCH) is allocated to the terminal in packet dedicated mode. A DTCH is unidirectional. DTCH/ is used for the uplink and a DTCH/D is used for the downlink. A DTCH may support either 2,45 kbps or 4,0 kbps encoded speech. Channels Direction (: plink, D: Downlink) Table 5.4: Dedicated Traffic Channels (eak Transmission Rates) Transmission symbol rate (ksps) Channel Coding Modulation Transmission bandwidth (khz) eak payload transmission rate (without CRC) (kbps) eak payload transmission rate (with CRC) (kbps) DTCH(1,3) /D 23,4 Conv. π/4-qsk 31,25 28,8 32,0 DTCH(1,6) /D 23,4 Conv. π/2-bsk 31,25 8,8 10,4 DTCH(1,6) /D 23,4 Conv. π/4-qsk 31,25 14,4 16,0 DTCH(1,8) /D 23,4 Conv. π/2-bsk 31,25 10,8 12,0

15 Control channels General Same as clause in TS [10] Broadcast channels Frequency Correction CHannel (FCCH) Same as clause in TS [10] with the following additional text: The FCCH may be broadcast using the FCCH burst or the FCCH3 burst GS Broadcast control CHannel (GBCH) Same as clause in TS [10] with the following additional text: The GBCH shall be broadcast using the DC6 burst. The GBCH3 contains the same information as the GBCH but is formatted to fit a DC12 burst structure. Different channel codings are used for GBCH and GBCH3, as described in TS [4] Broadcast Control CHannel (BCCH) The BCCH broadcasts system information to the MESs, and is downlink only. The BCCH system information parameters are described in TS [3]. System information parameters that are referenced in the present document are summarized in clause 10. The network shall indicate to the MES via BCCH whether or not packet-switched traffic is. Whenever the FCCH3 is present on the downlink, the BCCH shall be broadcast using the DC12 burst structure. Different channel codings are used for BCCH when it is transmitted over DC12, as described in TS [4] Common Control Channel (CCCH) Same as clause in TS [10] with the following additional text. The CCCH shall be transmitted using the DC6 burst when the FCCH burst is transmitted in the spot beam and the DC12 burst when the FCCH3 is used. Different channel codings are used for CCCH when it is transmitted over DC12, as described in TS [4]. Whenever the FCCH3 is present on the downlink, the BACH shall be broadcast using the BACH3 burst structure Dedicated control channels Same as clause in TS [10] Cell Broadcast CHannel (CBCH) The Cell Broadcast CHannel (CBCH) is downlink only and used to broadcast Short Message Service Cell Broadcast (SMSCB) information to MESs on a per-spot beam basis.

16 acket Common Control CHannels (CCCH) f a CCCH is not allocated, the information for packet-switched operation is transmitted on the CCCH. f a CCCH is allocated, it may transmit information for the circuit-switched operation. 1) acket Random Access Channel (RACH): plink only, used to request allocation of one or several DTCHs (for uplink or downlink direction). 2) acket Access Grant Channel (AGCH): Downlink only, used to allocate one or several DTCHs acket dedicated control channels 1) The acket Associated Control Channel (ACCH): The ACCH is bidirectional. For description purposes ACCH/ is used for the uplink and ACCH/D for the downlink. 2) acket Timing Advance Control Channel plink (TCCH/): sed to transmit packet normal bursts to allow estimation of the timing advance for one MES in packet transfer mode. 3) acket Timing Advance Control Channel Downlink (TCCH/D): sed to transmit timing advance updates for several MESs. One TCCH/D is paired with several TCCH/s. 4) Dedicated Associated Control Channel (DACCH): The DACCH is unidirectional. For description purposes DACCH/ is used for the uplink and DACCH/D is used for the downlink. The DACCH is used to transmit dedicated associated control signalling when a terminal is allocated a DCH. 6 The physical resource 6.1 General Same as clause 6.1 in TS [10]. 6.2 Radio frequency channels Spot beam allocation Same as clause in TS [10] Downlink and uplink Same as clause in TS [10]. 6.3 Timeslots and TDMA frames General Same as clause in TS [10] Timeslot number Same as clause in TS [10] TDMA frame number Same as clause in TS [10].

17 17 7 Bursts 7.1 General Same as clause 7.1 in TS [10], with the following additions. Tables 7.1 to 7.19 in TS [10] apply to the appropriate bursts described the present document. The physical channel burst for DCH(m,n) is denoted as a acket Normal Burst, NB(m,n) or NB2(m,n). The physical channel burst for the DCH3(m,n) is denoted as the NB3(m,n). The exception to this rule is the NB(1,6) burst which may be used in the uplink only of the DCH(1,6) and both the downlink and the uplink for a DCH3(1,6). Here, the bandwidth factor, m, refers to the integer multiple of the bandwidth, 31,25 khz, of the basic channel, and the time factor, n, refers to the number of timeslots. The ranges of these two variables are as follows: for m = 4 and 5, n = 3, for m = 1 and 2, n = 6, and for m = 5, n = 12. The NB(m,n), NB2(m,n) and NB3(m,n) bursts may be n = 3, 6, 8or 12 timeslots long. The burst data is modulated either using π/4-qsk, 16 ASK, or 32 ASK modulation, which maps two, four and five bits to one symbol, respectively. For additional details concerning the modulation of NB(m,n), NB2(m,n) and NB3(m,n) bursts, see TS [5]. The physical channel burst for RACH is denoted as acket Access Burst (AB). The physical channel burst for RACH3 is denoted as acket Access Burst3 (AB3). Both the AB and the AB3 are transmitted in the basic channel bandwidth 31,25 khz. t occupies 4,3 ms in a 5 ms time-slot, which results in ±0,35 ms guard-time. 7.2 Timing Half-symbol period The fundamental unit of burst timing is the half-symbol period. The half-symbol period is a function of the bandwidth 5 factor, m. A timeslot consists of (78 m) half-symbol periods, each of ms duration. A particular half-symbol 234 x m period within a burst is referenced by a half-symbol number (HSN), with the first half-symbol period numbered 0. n the following clauses, the transmission timing of a burst is defined in terms of half-symbol numbers. The half symbol with the lowest half-symbol number is transmitted first seful duration Different types of bursts exist in the system. One characteristic of a burst is its useful duration. The useful duration of a burst for circuit service is defined as beginning with HSN5. This present document defines bursts with useful durations of 146, 224, 458, 614 and 692 half-symbol periods, based on total durations of 2, 3, 6, 8 and 9 timeslots. The useful duration for packet normal bursts is defined as beginning with either HSN 5 m or with HSN 5. Table 7.0 lists the useful duration for different packet normal bursts.

18 18 Table 7.0: seful Duration For Different acket Normal Burst Types Burst Direction Beginning HSN seful Durations in Half-Symbol eriods NB(1,6) /D NB(2,6) D NB(4,3) /D 5 x m 896 NB(5,3) /D 5 x m NB2(5,3) /D 5 x m NB2(5,12) /D 5 x m NB3(1,3) /D NB3(1,6) /D NB3(1,8) /D NB3(2,6) 5 x m 916 NB3(2,6) D NB3(5,3) 5 x m NB3(5,3) D NB3(5,12) 5 x m NB3(5,12) D NB3(10,3) D Guard period The period between the useful durations of successive bursts is termed the guard period. Each burst has a guard period with a duration of either 5 m or 5 half-symbol periods before its useful duration, and a similar guard period with a duration of 5 m or 5 half-symbol periods after its useful duration, which has the effect of centering a burst's useful duration within its timeslot(s). 7.3 Multiple unique word patterns in bursts Many bursts contain a pattern of bits known as a unique word pattern, used to resolve phase ambiguities inherent in the modulation. The NT3, NT6, and NT9 bursts, described later, allow multiple patterns for the unique word to distinguish bursts that contain signalling (FACCH) from those that contain user information (speech/data). The SDCCH bursts use multiple unique word patterns to identify a subchannel associated with each SDCCH burst. Additional details concerning SDCCH subchannels use of multiple unique word patterns are in clause The NB3(1,3) NB3(1,6) and the NB3(1,8) contain different unique word patterns to distinguish between speech and data. Data can be either user data or control signalling. 7.4 Types of bursts General Same as clause 7.4 in TS [10] BACH burst General Same as clause in TS [10] BACH3 burst The BACH3 burst format, which occupies six timeslots, is modulated with π/2 BSK modulation and contains the information shown in table 7.1a. The BACH3 burst contains three BACH3 sequences of length 76.

19 19 Table 7.1a: BACH3 burst definition HSN Length of field in half Contents of field symbols 0 to 4 5 Guard period in half symbols 5 to BACH3 sequence S j 157 to BACH3 sequence S l 309 to BACH3 sequence S m 461 to dle bits 463 to Guard period in half symbols For additional details concerning the modulation of the BACH3 bursts and BACH3 sequences S j, S l, S m, see TS [5] BCCH burst Same as clause in TS [10] CCH burst Same as clause in TS [10] DC2 burst Same as clause in TS [10] DC6 burst Same as clause in TS [10] DKAB bursts General Same as clause in TS [10] KAB3 burst The keep-alive bursts (KAB3s) burst for three, six, and eight-slot dedicated traffic channels (DTCH(1,3), DTCH(1,6), and DTCH(1,8)) are KAB3(1,3), KAB3(1,6), and KAB3(1,8), respectively. KAB3(1,3), KAB3(1,6) and KAB3(1,8) are all π/2 binary phase-shift keying (BSK) modulated. Note that for π/2 BSK modulation, two half-symbols only transfer one bit of information. The KAB3(1,3), KAB3(1,6) and KAB3(1,8) burst definitions and W patterns are listed in tables 7.7a, 7.7b and 7.7c, respectively. Table 7.7a: KAB3(1,3) burst definition HSN Length of field in half Contents of field symbols 0 to 4 5 Guard period in half symbols 5 to dle bits (No signals) 21 to nique word; [ ] 37 to 44 8 Encoded bits e0 to e3 45 to dle bits (No signals) 191 to Encoded bits e4 to e7 199 to nique word; [ ] 213 to dle bits (No signals) 229 to Guard period in half symbols

20 20 Table 7.7b: KAB3(1,6) burst definition HSN Length of field in half Contents of field symbols 0 to 4 5 Guard period in half symbols 5 to dle bits (No signals) 21 to nique word; [ ] 41 to 48 8 Encoded bits e0 to e3 49 to dle bits (No signals) 215 to Encoded bits e4 to e7 223 to nique word; [ ] 245 to Encoded bits e8 to e to dle bits (No signals) 419 to Encoded bits e12 to e to nique word; [ ] 447 to dle bits (No signals) 463 to Guard period in half symbols Table 7.7c: KAB3(1,8) burst definition HSN Length of field in half Contents of field symbols 0 to 4 5 Guard period in half symbols 5 to dle bits (No signals) 21 to nique word; [ ] 37 to 44 8 Encoded bits e0 to e3 45 to dle bits (No signals) 293 to Encoded bits e4 to e7 301 to nique word; [ ] 323 to Encoded bits e8 to e to dle bits (No signals) 579 to Encoded bits e12 to e to nique word; [ ] 603 to dle bits (No signals) 619 to Guard period in half symbols FCCH burst General Same as clause in TS [10] FCCH3 burst The FCCH3 burst occupies twelve timeslots, and it has the format shown in table 7.8a. Table 7.8a: FCCH3 burst definition HSN Length of field in half Contents of field symbols 0 to 4 5 Guard period in half symbols 5 to Chirp modulation 931 to Guard period in half symbols For additional details concerning the modulation of the FCCH3 bursts, see TS [5].

21 NT3 burst General Same as clause in TS [10] NT3 burst for encoded speech Same as clause in TS [10] NT3 burst for FACCH Same as clause in TS [10] NT6 burst Same as clause in TS [10] NT9 burst Same as clause in TS [10] RACH burst General Same as clause in TS [10] RACH3 burst The RACH3 burst has a total duration of nine timeslots. The burst is π/2 BSK modulated including W and CW. Two half-symbols only transfer one bit of information. The burst format is as shown in table 7.17a. Table 7.17a: RACH3 Burst definition and W atterns HSN Length of field in half Contents of field symbols 0 to 4 5 Guard period in half symbols 5 to nique word [0,0,0,0,0,1,0,1,0,0,1,1,0,0,1,1,0,1,0,1,1,1,1] 51 to Encoded bits e0 to e to CW (coded as all 1 bits) 307 to Encoded bits e86 to e to CW (coded as all 1 bits) 479 to Encoded bits e130 to e to nique word [0,0,0,0,0,1,0,1,0,0,1,1,0,0,1,1,0,1,0,1,1,1,1] 697 to Guard period in half symbols SDCCH burst Same as clause in TS [10].

22 acket Normal Bursts (NB) General The acket Normal Bursts (NB) comprises of two parts. The first part, the burst header, is common to all NBs that share the same suffix (m,n). The burst header comprises guard bits, a unique word, and encoded ublic nformation () field. The second part is the encoded rivate nformation (R). ictorial description of the different NB(m,n) and NB2(m,n) is shown in figure 7.1 and for NB3(m,n) is shown in figures 7.2 and 7.3. Refer to clauses to for a description on the different parts of NB(m,n) and NB2(m,n) shown in figure 7.1 and NB3(m,n) shown in figures 7.2 and 7.3.

23 23 GMR-1 3G (a) Convolutionally coded NB(4,3) and NB(5,3) Downlink/plink Guard W R Guard W R W Burst Header Burst Header (b) NB(1,6) Downlink/plink (c) NB(2,6) Downlink n œ ˆ ~ w p { y lÿ G w p w y p ~ w y p ~ w y p ~ n œ ˆ iœ š GoŒˆ Œ (d) LDC coded NB2(5,12) Downlink n œ ˆ ~ w p { y w y p ~ w y p ~ w y p ~ n œ ˆ iœ š GoŒˆ Œ (e) LDC coded NB2(5,12) plink G u a r d W T R R W R W G u a r d Burst Header (f) LDC coded NB2(5,3) Downlink/plink Figure 7.1: Burst header and R within NB(m,n) and NB2(m,n) G u a r d W R G u a r d T r T a i l Burst Header G u a r d W W W R W G u a r d R Burst Header

24 24 GMR-1 3G (a) NB3(5,3) Downlink (b) NB3(5,3) Downlink with L-MA (c) NB3(5,3) plink (d) NB3(5,12) Downlink (e) NB3(5,12) Downlink with L-MA (f) NB3(5,12) plink Figure 7.2: Burst header and R within NB3(m,n) G u a r d W W R W R W G u a r d Burst Header G u a r d W W R W R W G u a r d L M A Burst Header G u a r d W W R W R W G u a r d Burst Header G u a r d W W R W R W R W G u a r d Burst Header G W W L M A W R W R W G u a r d L M A Burst Header G u a r d W W R W R W R W G u a r d Burst Header

25 25 G u a r d W W R W R W G u a r d Burst Header (a) NB3(10,3) Downlink G u a r d W W L M A R W R W G u a r d Burst Header (b) NB3(10,3) Downlink with L-MA Guard R W R W R Guard (c) NB3(1,3) Downlink/plink Guard R W R W R W R Guard (d) NB3(1,6) Downlink/plink Guard R W R W R W R Guard (e) NB3(1,8) Downlink/plink Guard W W R W R W Guard Burst Header (f) NB3(2,6) Downlink Guard W W R W R W Guard Burst Header (g) NB3(2,6) plink Figure 7.3: Burst header and R within NB3(m,n)

26 26 An MES of terminal type C shall be able to transmit an uplink NB(1,6) immediately after RX-TX switching time (see TS [6]) from the reception of the last symbol of the burst header of downlink NB(2,6). Consequently, an MES of terminal type C shall be capable of decoding and interpreting the burst header received prior to this transmission on uplink NB(1,6). See also TS [7] and TS [9] for further description. An MES of terminal types E and above which do not support full duplex operation shall be able to transmit an uplink NB(1,6) or NB3(m,n) immediately after RX-TX switching time (see TS [6]) from the reception of the last symbol of the burst header of downlink NB3(m,n) including LMA if any. Consequently, an MES of terminal type E and above which do not support full duplex operation shall be capable of decoding and interpreting the burst header received prior to this transmission on uplink NB3(m,n) or NB(1,6). See also TS [7] and TS [9] for further description. Similarly, MES operating in u-s mode that do not support full duplex operation shall be capable of detecting the presence or absence of in the received portion of the downlink burst. f the MES determines that it has not received the in the downlink portion of the burst, it shall disregard the received burst portion, and shall attempt to receive the in the subsequent reception window. The following is an example scenario where a half-duplex MES might not receive in the received portion of the downlink burst: Suppose a half duplex MES transmits on the uplink and after TX-RX switching time after the last symbol has been transmitted it starts to listen to downlink burst. The time at which the MES starts to listen to downlink burst might be such that it has just missed the part of a 20 ms downlink burst. Given that the MES is unaware whether the network transmitted a 5 ms, 10 ms or 20 ms downlink burst, the MES attempts to decode a at every 5 ms boundary. Given that a 20 ms downlink burst was in progress at the time of switching to downlink, there will not be a at 5 ms intervals where the MES is attempting to decode. f the MES blindly attempted to decode a without a detection hypothesis, it could incorrectly infer that an uplink allocation has been granted to it and therefore collide on uplink with a legitimate uplink transmission of a different user. A detection hypothesis is therefore necessary to determine presence or absence of a in downlink in such scenarios Burst header General The burst header of the NB(m,n) is modulated using π/4-qsk. The various fields of the burst header are described below Guard bits f m = 4 or m = 5, the NB(m,n) or NB2(m,n) has 5 m guard bits at the beginning of the burst (as a part of the burst header) and 5 m guard bits at the end of the burst. f m = 1 or m = 2, the NB(m,n) has 5 guard bits at the beginning of the burst (as a part of the burst header) and 5 guard bits at the end of the burst. NB3(1,3), NB3(1,6), NB3(1,8) have 5 guard bits at the beginning of the burst and 5 guard bits at the end of the burst. NB3(5,3) and NB3(5,12) uplink burst have 25 guard bits at the beginning of the burst (as a part of the burst header) and 25 guard bits at the end of the burst. NB3(5,3) and NB3(5,12) downlink burst have 5 guard bits at the beginning of the burst (as a part of the burst header) and 5 guard bits at the end of the burst. NB3(10,3) has 5 guard bits at the beginning of the burst (as a part of the burst header) and 5 guard bits at the end of the burst nique Word (W) The burst header of NB(1,6) has 14 bits of nique Word (W). There are additional 30 bits of W within the R portion of NB(1,6). The burst header of NB(2,6) has total of 36 bits of W; 18 W bits are located before the and another 18 W bits are located after the. There are additional 32 bits of W within the R portion of NB(2,6).

27 27 The nique Word (W) size for the NB(m,3), (m = 4, 5) is 10 m bits. The entire W is located within the burst header for convolutionally coded NB(m,3), m = 4 or 5. The burst header of NB2(5,12) has total of 50 bits of W. There are additional 82 bits of W within the R portion of NB(5,12). The burst header of NB2(5,3) has total of 50 bits of W. There are additional 54 bits of W within the R portion of NB2(5,3). The burst header of NB3(5,12) has total of 60 bits of W. There are additional 82 bits of W within the R portion of NB3(5,12). The burst header of NB3(5,3) has total of 60 bits of W. There are additional 54 bits of W within the R portion of NB3(5,3). The burst header of NB3(10,3) has total of 60 bits of W. There are additional 54 bits of W within the R portion of NB3(10,3). NB3(1,3) has a total of 30 bits of W except KAB3(1,3), which is π/2-bsk modulated and has 15 bits of W. NB3(1,6) 2,45 kbps has a total of 31 bits of W, NB3(1,6) 4,0 kbps has a total of 62 bits of W and NB3(1,8) has a total of 27 bits of W. Note that, for NB3(1,3) 2,45 kbps and 4,0 kbps and NB3(1,6) 4,0 kbps, the unique words are QSK modulated and there is no extra π/4-rotation, although the payload portion of the burst is π/4-qsk modulated. For KAB3(1,3), NB3(1,6) 2,45 kbps voice/data, KAB3(1,6), NB3(1,8) 4,0 kbps voice/data, and KAB3(1,8) bursts, the modulation scheme is identical for both payload and unique words, which is π/2-bsk. The W is modulated with π/4-qsk or QSK for NBs with payload modulated with 16 ASK and 32 ASK, the amplitude of all the W will be equivalent to the amplitude of the outermost constellation of each payload modulation scheme. For the W within the R portion of the NB2(5,3), NB3(5,3), NB2(5,12), NB3(5,12), and NB3(10,3), a constant π/4 phase shift is performed across QSK modulated W, instead of π/4 QSK modulation. n the transmission of the π/4-qsk NB2(5,12) and NB2(5,3) with rate ½ LDC coded payload, the amplitude of the W symbols will be 2,04 db (i.e. amplitude of 1,2658) higher than the payload amplitude. n the transmission of the downlink π/4-qsk NB3(5,12), NB3(5,3), and NB3(10,3) with rate ½ Turbo coded payload, the amplitude of the W symbols will be 1,02 db (i.e. amplitude of 1,125) higher than the payload amplitude blic nformation () field The size of the uplink and the downlink is 12 bits. The size of encoded is 48 bits. The size of downlink 3 that is transmitted over NB3(5,3) is 32 bits (including 3 bit CRC), and the size of the encoded 3 is 128 bits. The size of downlink 3 that is transmitted over NB3(5,12) is 80 bits (including 3 bit CRC), and the size of the encoded 3 is 320 bits. The size of downlink 3 that is transmitted over NB3(10,3) is 64 bits (including 3 bit CRC), and the size of the encoded 3 is 256 bits. Refer to TS [9] for detailed description of and 3. The detailed description of the coding is in TS [4]. n addition to the, the burst NB2(5,12) in the down link has an extended. The size of the downlink extended is 30 bits. The size of encoded is 96 bits. Refer to TS [9] for detailed description of. The detailed description of the extended coding is in TS [4]. The amplitude of both and extended will be equivalent to the amplitude of the outermost constellation of each payload modulation scheme. n the transmission of the π/4-qsk NB2(5,12) and NB2(5,3) with rate 1/2 LDC coded payload, the amplitude of and extended symbols will be 2,04 db (i.e. amplitude of 1,2658) higher than the payload amplitude. n the transmission of the downlink π/4-qsk NB3(5,12), NB3(5,3), and NB3(10,3) with rate 1/2, the amplitude of 3 will be 1,02 db (i.e. amplitude of 1,125) higher than the payload amplitude Transition symbols Each NB(m,n), except NB(1,6) and NB(2,6), has m symbols for transition between the two burst parts. There are no transition symbols for NB(1,6) and NB(2,6). NB2(5,12) downlink has m symbols for transition between the and the extended. The amplitude of transition symbols will be equivalent to the amplitude of the outermost constellation of each payload modulation scheme. n the transmission of the π/4-qsk NB2(5,12) and NB2(5,3) with rate 1/2 LDC coded payload, the amplitude of the transition symbols will be 2,04 db (i.e. amplitude of 1,2658) higher than the payload amplitude.