(51) Int Cl.: H04B 7/06 ( ) H04B 7/08 ( )

Transcription

1 (19) TEPZZ 4 447B_T (11) EP B1 (12) EUROPEAN PATENT SPECIFICATION (4) Date of publication and mention of the grant of the patent: Bulletin 17/36 (21) Application number: (22) Date of filing: (1) Int Cl.: H04B 7/06 (06.01) H04B 7/08 (06.01) (86) International application number: PCT/US/04199 (87) International publication number: WO 11/0061 ( Gazette 11/02) (4) APPARATUS AND METHOD FOR MULTIPLE PEER-TO-PEER SIGNALING VORRICHTUNG UND VERFAHREN FÜR MEHRERE PEER-TO-PEER SIGNALISIERUNG APPAREIL ET PROCÉDÉ POUR SIGNALISATION DE POSTE Á POSTE (84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR () Priority: US P US 8141 (43) Date of publication of application: Bulletin 12/ (73) Proprietor: Qualcomm Incorporated San Diego, CA (US) (72) Inventors: TAGHAVI NASRABADI, Mohammad Hossein San Diego California (US) SAMPATH, Hemanth San Diego California (US) ABRAHAM, Santosh P. San Diego California (US) VERMANI, Sameer San Diego California (US) (74) Representative: Schmidbauer, Andreas Konrad Wagner & Geyer Partnerschaft Patent- und Rechtsanwälte Gewürzmühlstrasse 8038 München (DE) (6) References cited: WO-A1-/06888 US-A US-A "Draft amendment to IEEE standard for Information technology --Part 1.3: Wireless Medium Access Control(MAC) and Physical Layer (PHY)Specifications for High Rate WirelessPersonal Area Networks (WPANs): Amendment 2" IEEE Standard vol. P802.1c/D, 1 June 09 ( ), XP Piscataway Retrieved from the Internet: URL: [retrieved on --28] cited in the application EP B1 Note: Within nine months of the publication of the mention of the grant of the European patent in the European Patent Bulletin, any person may give notice to the European Patent Office of opposition to that patent, in accordance with the Implementing Regulations. Notice of opposition shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention). Printed by Jouve, 7001 PARIS (FR)

2 1 EP B1 2 Description CROSS-REFERENCE TO RELATED APPLICA- TION(S) [0001] This application claims the benefit of U.S. Provisional Application Serial No. 61/224,816 filed on July, 09. BACKGROUND Field [0002] The following description relates generally to communication systems and, more particularly, to multiple peer-to-peer signaling. Background [0003] In order to address the issue of increasing bandwidth requirements that are demanded for wireless communications systems, different technologies are being developed to allow multiple wireless nodes to communicate by sharing the channel resources while achieving high data throughputs. These technologies have been adopted in several emerging wireless communications standards, such as the Institute of Electrical Engineers (IEEE) standard. IEEE denotes a set of Wireless Local Area Network (WLAN) air interface standards developed by the IEEE committee for shortrange communications (e.g., tens of meters to a few hundred meters). One example includes IEEE ad to support 60 Ghz. operation, which is sometimes referred as "Extremely High Throughput." [0004] Various protocols exist for high throughput systems. One example is the IEEE c MAC protocol for wireless personal area networks (PAN). The c MAC protocol provides dedicated time-intervals for each pair of wireless nodes in a communications system to train with respect to each other, prior to data communication. However, as the number of peer-to-peer communications grows, this mechanism suffers from increased training overhead. There is a need to reduce peer-to-peer training overhead for high throughput systems, such IEEE ad systems and the like. SUMMARY [000] In an aspect of the disclosure, an apparatus for wireless communication includes a processing system. The processing system is configured to generate a first signal for transmission to a wireless node to enable the wireless node to determine a first preferred beam pattern, to determine a second preferred beam pattern from a second signal received from the wireless node, and to communicate with the wireless node through at least one of the first or second preferred beam pattern. [0006] In an aspect of the disclosure, a method for wireless communication includes generating a first signal for transmission to a wireless node to enable the wireless node to determine a first preferred beam pattern, determining a second preferred beam pattern from a second signal received from the wireless node, and communicating with the wireless node through at least one of the first or second preferred beam pattern. [0007] In an aspect of the disclosure, an apparatus for wireless communication includes means for generating a first signal for transmission to a wireless node to enable the wireless node to determine a first preferred beam pattern, means for determining a second preferred beam pattern from a second signal received from the wireless node, and means for communicating with the wireless node through at least one of the first or second preferred beam pattern. [0008] In an aspect of the disclosure, a computer-program product for communication includes a machinereadable medium including instructions executable to generate a first signal for transmission to a wireless node to enable the wireless node to determine a first preferred beam pattern, to determine a second preferred beam pattern from a second signal received from the wireless node, and to communicate with the wireless node through at least one of the first or second preferred beam pattern. [0009] In an aspect of the disclosure, a station for wireless communication includes a processing system and a wireless interface. The processing system is configured to generate a first signal for transmission to a wireless node to enable the wireless node to determine a first preferred beam pattern, to determine a second preferred beam pattern from a second signal received from the wireless node, and to communicate with the wireless node through at least one of the first or second preferred beam pattern. The wireless interface has one or more antennas configured to support the first and second preferred beam patterns. Attention is drawn to the "Draft amendment to IEEE standard for Information technology --Part 1.3: Wireless Medium Access Control (MAC) and Physical Layer (PHY) Specifications for High Rate Wireless Personal Area Networks (WPANs): Amendment 2", IEEE Standard, Piscataway, vol. P802.1c/D, (090601), URL: (28). See in particular paragraph [ ] - paragraph [ ], and paragraphs [ ] and [ ]. [00] Further attention is drawn to US 09/12271 A1 describing a wireless communications network that uses a beamforming process to increase signal quality as well as transmission capabilities and reduction of interference. An improved Golay sequence is also used in the wireless communications network. In one aspect, the processes can be used to communicate regardless of whether the system is on an OFDM mode or a single carrier mode. 2

3 3 EP B1 4 SUMMARY BRIEF DESCRIPTION OF DRAWINGS [0011] In accordance with the present invention a method, and an apparatus, as set forth in the independent claims, respectively, are provided. Preferred embodiments of the invention are described in the dependent claims. [0012] In an aspect of the disclosure, an apparatus for wireless communication includes a processing system. The processing system is configured to generate a first signal for transmission to a wireless node to enable the wireless node to determine a first preferred beam pattern, to determine a second preferred beam pattern from a second signal received from the wireless node, and to communicate with the wireless node through at least one of the first or second preferred beam pattern. [0013] In an aspect of the disclosure, a method for wireless communication includes generating a first signal for transmission to a wireless node to enable the wireless node to determine a first preferred beam pattern, determining a second preferred beam pattern from a second signal received from the wireless node, and communicating with the wireless node through at least one of the first or second preferred beam pattern. [0014] In an aspect of the disclosure, an apparatus for wireless communication includes means for generating a first signal for transmission to a wireless node to enable the wireless node to determine a first preferred beam pattern, means for determining a second preferred beam pattern from a second signal received from the wireless node, and means for communicating with the wireless node through at least one of the first or second preferred beam pattern. [001] In an aspect of the disclosure, a computer-program product for communication includes a machinereadable medium including instructions executable to generate a first signal for transmission to a wireless node to enable the wireless node to determine a first preferred beam pattern, to determine a second preferred beam pattern from a second signal received from the wireless node, and to communicate with the wireless node through at least one of the first or second preferred beam pattern. [0016] In an aspect of the disclosure, a station for wireless communication includes a processing system and a wireless interface. The processing system is configured to generate a first signal for transmission to a wireless node to enable the wireless node to determine a first preferred beam pattern, to determine a second preferred beam pattern from a second signal received from the wireless node, and to communicate with the wireless node through at least one of the first or second preferred beam pattern. The wireless interface has one or more antennas configured to support the first and second preferred beam patterns [0017] FIG. 1 is a conceptual block diagram illustrating the hardware configuration for an exemplary apparatus. FIG. 2 is a flow diagram illustrating an example of a timeline for peer-to-peer training. FIG. 3 is a conceptual block diagram illustrating the functionality of an exemplary apparatus. DETAILED DESCRIPTION [0018] Various aspects of the novel systems, apparatus and methods are described more fully hereinafter with reference to the accompanying drawings. The teachings disclosure may, however, be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Based on the teachings herein one skilled in the art should appreciate that that the scope of disclosure is intended to cover any aspect of the novel systems, apparatus and methods disclosed herein, whether implemented independently of or combined with any other aspect of the invention. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. In addition, the scope of the invention is intended to cover such an apparatus or method which is practiced using other structure, functionality, or structure and functionality in addition to or other than the various aspects of the invention set forth herein. It should be understood that any aspect disclosed herein may be embodied by one or more elements of a claim. [0019] Several aspects of a wireless communications system will now be presented. The wireless communications system may support any number of apparatuses. In this example, each apparatus is implemented as a wireless node. A wireless node may be a station (STA), or other suitable node. [00] The wireless communications system may be configured to support multiple STAs employing Multiple- Input and Multiple-Output (MIMO) technology supporting any suitable wireless technology, such as Orthogonal Frequency Division Multiplexing (OFDM). An OFDM system may implement IEEE , or some other air interface standard. Other suitable wireless technologies include, by way of example, Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), or any other suitable wireless technology, or any combination of suitable wireless technologies. A CDMA system may implement IS-00, IS-9, IS-86, Wideband-CD- MA (WCDMA), or some other suitable air interface stand- 3

4 EP B1 6 ard. A TDMA system may implement Global System for Mobile Communications (GSM) or some other suitable air interface standard. As those skilled in the art will readily appreciate, the various aspects of this disclosure are not limited to any particular wireless technology and/or air interface standard. The various concepts presented throughout this disclosure may also be extended to short range radio technology, such as Ultra-Wide Band (UWB), or some other short range air interface standard such as Bluetooth. The actual wireless technology and air interface standard employed for any particular communications system will depend on the specific application and the overall design constraints imposed on the system. The various concepts presented throughout this disclosure are equally applicable to a wireless communications system employing other wireless technologies and/or air interface standards. [0021] The wireless communications system may support any number of APs distributed throughout a geographic region. A STA, which may be fixed or mobile, engages in peer-to-peer communications with other STAs. Examples of STAs include a mobile telephone, laptop computer, a personal digital assistant (PDA), a mobile digital audio player, a mobile game console, a digital camera, a digital camcorder, a mobile audio device, a mobile video device, a mobile multimedia device, or any other suitable device capable of supporting wireless communications. A STA may utilize the backhaul services of an access point (AP) to gain access to a larger network (e.g., Internet). [0022] A STA may be referred to by those skilled in the art by different nomenclature. By way of example, a STA may be referred to as a user terminal, a mobile station, a subscriber station, a wireless device, a terminal, an access terminal, a node, or some other suitable terminology. The various concepts described throughout this disclosure are intended to apply to all suitable apparatuses regardless of their specific nomenclature. [0023] Various aspects of an apparatus will now be presented with reference to FIG. 1. FIG. 1 is a conceptual block diagram illustrating a hardware configuration for an apparatus. The apparatus 0 may include a wireless interface 2 and a processing system 4. [0024] The wireless interface 2 may include a transceiver having a transmitter and receiver function to support two-way communications over the wireless medium. Alternatively, the wireless interface 2 may be configured as a transmitter or receiver to support one-way communications. In the detailed description that follows, a wireless interface may be described as a transmitter or a receiver to illustrate a particular aspect of the invention. Such a reference does not imply that the wireless interface is incapable of performing both transmit and receive operations. [002] The wireless interface 2 may support different air interface protocols. By way of example, the wireless interface 2 may include a 60 GHz HF radio to support IEEE ad (Extremely High Throughput), or some other suitable air interface protocol. The wireless interface 2 may also be configured to implement the physical layer by modulating wireless signals and performing other radio frequency (RF) front end processing. Alternatively, the physical layer processing function may be performed by the processing system 4. [0026] The wireless interface 2 is shown as a separate entity. However, as those skilled in the art will readily appreciate, the wireless interface 2, or any portion thereof, may be integrated into the processing system 4, or distributed across multiple entities within the apparatus 0. [0027] The processing system 4 may be implemented with one or more processors. The one or more processors may be implemented with any combination of general-purpose microprocessors, microcontrollers, a Digital Signal Processors (DSP), Field Programmable Gate Arrays (FPGA), Programmable Logic Devices (PLD), controllers, state machines, gated logic, discrete hardware components, or any other suitable entities that can perform calculations or other manipulations of information. [0028] The processing system 4 may also include machine-readable media for storing software. Software shall be construed broadly to mean any type of instructions, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. Instructions may include code (e.g., in source code format, binary code format, executable code format, or any other suitable format of code). The instructions, when executed by the one or more processors, cause the processing system 2 to perform the various functions described below, as well as other protocol processing functions (e.g., data link layer processing). [0029] Machine-readable media may include storage integrated into one or more of the processors. Machinereadable media may also include storage external to the one or more processor, such as a Random Access Memory (RAM), a flash memory, a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable PROM (EPROM), registers, a hard disk, a removable disk, a CD-ROM, a DVD, or any other suitable storage device. In addition, machine-readable media may include a transmission line or a carrier wave that encodes a data signal. Those skilled in the art will recognize how best to implement the described functionality for the processing system. [00] An example of multiple apparatuses operating in a wireless communications system will now be presented. In one example, the wireless communications system uses CDMA transmission to allow multiple pairs of STAs to simultaneously train with each other in a dedicated time-interval for peer-to-peer training. Such a scheme may substantially reduce control overhead in the 60 GHz system and improve MAC efficiency. [0031] FIG. 2 is a flow diagram illustrating an example of a timeline for peer-to-peer training for multiple STAs. Each STA includes a processing system 4 and a wire- 4

5 7 EP B1 8 less interface 2. The AP reserves a dedicated timeinterval for peer-to-peer training. The AP sends each STA a trainingsequenceid using unicast DL control frame message. Using the trainingsequenceid, multiple pairs of STAs may perform peer-to-peer training simultaneously. A pair of STAs STA-1 and STA-2 perform peer-topeer training as follows. [0032] First, STA-1 transmits a Walsh or a Golay sequence (trainingsequenceid) of length L serially across A T transmit beam patterns (e.g., directions) supported by STA-2, N R times for each transmit beam pattern, where N R is the number of receive beam patterns supported by STA-2 (step 2). Such a transmission will be referred to as a "double-lighthouse" transmission. Assuming A T and N R are each 64, a system chip-rate of 1.7 Gps, a Walsh/Golay chip duration of 0.6 ns, and L=64, the total transmission time will be approximately 17 us (0.6 ns * 64 * 64 * 64). [0033] For 60 GHz short-range PAN type networks, normally there are not more than 16 active stations per AP. As such, at any given peer-to-peer training time, no more than 8 pairs of STAs will engage in peer-to-peer training. [0034] STA-2 receives the sequence from STA-1 and estimates the preferred (e.g., the best) transmit and receive beam patterns for STA-1 to STA-2 communication using Walsh/Golay correlation of the received waveform using the trainingsequenceid. As such, after step 2, STA-2 knows the preferred transmit and receive beam patterns for STA-1 to STA-2 communication. [003] Second, STA-2 transmits a Walsh or a Golay sequence (specified by trainingsequenceid) serially across N T transmit beam patterns supported by STA-2, A R times for each beam pattern (double-lighthouse), where A R is the number of receive beam patterns supported by STA-1 (step 2). Assuming N T and A R are each 64, a system chip-rate of 1.7 Gps, a Walsh/Golay chip duration of 0.6 ns, and L=64, the total transmission time will be approximately 17 us (0.6 ns * 64 * 64 * 64). [0036] STA-1 receives the sequence from STA-2 and estimates the preferred transmit and receive beam patterns for STA-2 to STA-1 communication using Walsh/Golay correlation of the received waveform using the trainingsequenceid. As such, after step 2, STA-1 knows the preferred transmit and receive beam patterns for STA-2 to STA-1 communication. [0037] Third, STA-2 then sends a sequence corresponding to a 6-bit transmit beam index to STA-1 (step 2). The index indicates a preferred transmit beam pattern for STA-1 to STA-2 communication (i.e., one of the A T transmit beam patterns). STA-2 selects a length L Walsh or Golay sequence corresponding to the 6-bit index. STA-2 scrambles the length L sequence with a seed equal to the trainingsequenceid. The scrambling sequence generator can be according to section of the IEEE c specification. STA-2 transmits this sequence serially across N T transmit beam patterns, only once for each transmit beam pattern. Because STA knows the preferred receive beam pattern for STA-2 to STA-1 communication (i.e., one of the A R receive beam patterns), STA-1 uses it s preferred receive beam pattern to receive the sequence. This transmission is referred to as a "single-lighthouse" transmission. Assuming L is 26, the total transmission time is approximately us (0.6 ns * 26 * 64). As such, after step 2, STA-1 knows the preferred transmit and receive beam patterns for STA-2 to STA-1 communication and the preferred transmit beam pattern for STA-1 to STA-2 communication. [0038] Fourth, STA-1 sends a sequence corresponding to a 6-bit transmit beam index to STA-2 (step 2). The index indicates a preferred transmit beam pattern for STA-2 to STA-1 communication (i.e., one of the N T transmit beam patterns). STA-1 selects a length L Walsh or Golay sequence corresponding to the 6-bit index. STA- 1 scrambles the length L sequence with a seed equal to the trainingsequenceid. The scrambling sequence generator can be according to section of the c specification. STA-1 transmits the sequence through the preferred transmit beam pattern for STA-1 to STA-2 communication (i.e., one of the A T transmit beam patterns). Because STA-2 knows the preferred receive beam pattern for STA-1 to STA-2 communication, STA-2 uses it s preferred receive beam pattern (i.e., one of the N R receive beam patterns) to receive the sequence. Assuming L equals 26, the total transmission time is approximately 10 ns (0.6 ns * 26). [0039] FIG. 3 is a conceptual block diagram illustrating the functionality of an exemplary apparatus 0. The apparatus 0 includes a module 2 for generating a first signal for transmission to a wireless node to enable the wireless node to determine a first preferred beam pattern, a module 4 for determining a second preferred beam pattern from a second signal received from the wireless node, a module 6 for communicating with the wireless node through at least one of the first or second preferred beam pattern. In one configuration, the apparatus 0 includes a processing system 4 and the processing system 4 is configured to perform the functions of each of the modules 2-6. In one configuration, the first preferred beam pattern includes a preferred transmit beam pattern supported by the apparatus 0 and a preferred receive beam pattern supported by the wireless node; and the second preferred beam pattern includes a preferred transmit beam pattern supported by the wireless node and a preferred receive beam pattern supported by the apparatus 0. In one configuration, the apparatus 0 is configured to receive a third signal from the wireless node and to send a fourth signal to the wireless node. The third signal corresponds to the first preferred beam pattern and may correspond to the preferred transmit beam pattern supported by the apparatus. The fourth signal corresponds to the second preferred beam pattern and may correspond to the preferred transmit beam pattern supported by the wireless node. In another configuration, the apparatus 0 is configured to send a third signal to the wireless node receive a fourth signal from

6 9 EP B1 the wireless node. The third signal corresponds to the second preferred beam pattern and may correspond to the preferred transmit beam pattern supported by the wireless node. The fourth signal corresponds to the first preferred beam pattern and may correspond to the preferred transmit beam pattern supported by the apparatus. [00] In one configuration, the apparatus 0 includes means for generating a first signal for transmission to a wireless node to enable the wireless node to determine a first preferred beam pattern; means for determining a second preferred beam pattern from a second signal received from the wireless node; and means for communicating with the wireless node through at least one of the first or second preferred beam pattern. The aforementioned means is the processing system 4 configured to perform the functions of the aforementioned means. [0041] The previous description is provided to enable any person skilled in the art to fully understand the full scope of the disclosure. Modifications to the various configurations disclosed herein will be readily apparent to those skilled in the art. Thus, the claims are not intended to be limited to the various aspects of the disclosure described herein, but is to be accorded the full scope consistent with the language of claims, wherein reference to an element in the singular is not intended to mean "one and only one" unless specifically so stated, but rather "one or more." Unless specifically stated otherwise, the term "some" refers to one or more. A claim that recites at least one of a combination of elements (e.g., "at least one of A, B, or C") refers to one or more of the recited elements (e.g., A, or B, or C, or any combination thereof). All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. Claims 1. A method for wireless communication, comprising: generating a first signal comprising a training sequence specified by a trainingsequenceid for transmission to a wireless node to enable the wireless node to determine a first preferred beam pattern; determining a second preferred beam pattern from a second signal comprising a training sequence specified by a trainingsequenceid received from the wireless node; and communicating with the wireless node through at least one of the first or second preferred beam pattern; wherein the training sequence of the first signal comprises a Walsh sequence or a Golay sequence and the training sequence of the second signal comprises a Walsh sequence or a Golay sequence. 2. The method of claim 1, wherein: the first preferred beam pattern comprises a preferred transmit beam pattern supported by an apparatus and a preferred receive beam pattern supported by the wireless node; and the second preferred beam pattern comprises a preferred transmit beam pattern supported by the wireless node and a preferred receive beam pattern supported by the apparatus. 3. The method of claim 2, further comprising receiving a third signal corresponding to the first preferred beam pattern from the wireless node. 4. The method of claim 3, wherein the receiving of the third signal, which is transmitted sequentially through different transmit beam patterns by the wireless node, is through the preferred receive beam pattern supported by the apparatus.. The method of claim 3, wherein the receiving of the third signal, which is transmitted through the preferred transmit beam by the wireless node, is through the preferred receive beam pattern supported by the apparatus. 6. The method of claim 3, wherein each of the first and second signals comprises the same training sequence, the method further comprising decoding the third signal with the training sequence. 7. The method of claim 2, further comprising generating a third signal corresponding to the second preferred beam pattern for transmission to the wireless node. 8. The method of claim 7, further comprising supporting the transmission of the third signal sequentially through different transmit beam patterns for reception by the wireless node signal through the preferred receive beam pattern; or further comprising supporting the transmission of the third signal through the preferred transmit beam pattern supported by the apparatus for reception by the wireless node through the preferred receive beam pattern supported by the wireless node. 9. The method of claim 7, wherein each of the first and second signals comprises the same training sequence, and wherein the third signal is generated by encoding a sequence corresponding to the second preferred beam pattern with the training sequence.. The method of claim 1, further comprising supporting 6

7 11 EP B1 12 the transmission of the first signal sequentially through different transmit beam patterns, one or more times through each of the different transmit beam patterns. 11. The method of claim 1, further comprising: a machine-readable medium comprising instructions executable to carry out the method of any of claims 1 to 13. Patentansprüche supporting A T different transmit beam patterns; and supporting the transmission of the first signal sequentially through the A T different transmit beam patterns, N R times through each of the A T different transmit beam patterns, wherein N R is the number of different receive beam patterns supported by the wireless node. 12. The method of claim 1, further comprising: supporting A R different receive beam patterns; and receiving the second signal sequentially through the A R different receive beam patterns, N T times though each of the A R different receive beam patterns, wherein N T is the number of different transmit beam patterns supported by the wireless node. 13. The method of claim 1, further comprising training including the generation of the first signal for transmission and the receipt of the second signal from the wireless node, the training being performed simultaneously as one or more other pairs of wireless nodes perform training; and preferably wherein the training is performed across at least one of time, frequency, or code dimensions. 14. An apparatus for wireless communication, comprising: means for generating (2) a first signal comprising a training sequence specified by a trainingsequenceid for transmission to a wireless node to enable the wireless node to determine a first preferred beam pattern; means for determining (4) a second preferred beam pattern from a second signal comprising a training sequence specified by a trainingsequenceid received from the wireless node; and means for communicating (6) with the wireless node through at least one of the first or second preferred beam pattern; wherein the training sequence of the first signal comprises a Walsh sequence or a Golay sequence and the training sequence of the second signal comprises a Walsh sequence or a Golay sequence Ein Verfahren zur Drahtloskommunikation, das Folgendes aufweist: Generieren eines ersten Signals, das eine Trainingssequenz, die durch eine TrainingsSequenzID bzw. trainingsequenceid spezifiziert wird, zur Sendung an einen Drahtlosknoten aufweist, um dem Drahtlosknoten zu ermöglichen, ein erstes bevorzugtes Beam- bzw. Strahlmuster zu bestimmen; Bestimmen eines zweiten bevorzugten Strahlmusters aus einem zweiten Signal, das eine Trainingssequenz, die durch eine trainingsequenceid spezifiziert wird, aufweist, das von dem Drahtlosknoten empfangen wird; und Kommunizieren, mit dem Drahtlosknoten, durch das erste und/oder zweite bevorzugte Strahlmuster; wobei die Trainingssequenz des ersten Signals eine Walsh-Sequenz oder eine Golay-Sequenz aufweist und die Trainingssequenz des zweiten Signals eine Walsh-Sequenz oder eine Golay-Sequenz aufweist. 2. Verfahren nach Anspruch 1, wobei: das erste bevorzugte Strahlmuster ein bevorzugtes Sendestrahlmuster, das durch eine Vorrichtung unterstützt wird, und ein bevorzugtes Empfangsstrahlmuster, das durch den Drahtlosknoten unterstützt wird, aufweist; und das zweite bevorzugte Strahlmuster ein bevorzugtes Sendestrahlmuster, das durch den Drahtlosknoten unterstützt wird, und ein bevorzugtes Empfangsstrahlmuster, das durch die Vorrichtung unterstützt wird, aufweist. 3. Verfahren nach Anspruch 2, das weiter Empfangen eines dritten Signals entsprechend dem ersten bevorzugten Strahlmuster von dem Drahtlosknoten aufweist. 4. Verfahren nach Anspruch 3, wobei das Empfangen des dritten Signals, welches sequenziell durch unterschiedliche Sendestrahlmuster durch den Drahtlosknoten gesendet wird, durch das bevorzugte Empfangsstrahlmuster stattfindet, welches durch die Vorrichtung unterstützt wird. 1. A computer-program product for communication, comprising:. Verfahren nach Anspruch 3, wobei das Empfangen des dritten Signals, welches durch den bevorzugten 7

8 13 EP B1 14 Sendestrahl durch den Drahtlosknoten gesendet wird, durch das bevorzugte Empfangsstrahlmuster stattfindet, das durch die Vorrichtung unterstützt wird. 6. Verfahren nach Anspruch 3, wobei jedes der ersten und zweiten Signale die gleiche Trainingssequenz aufweist, wobei das Verfahren weiter Decodieren des dritten Signals mit der Trainingssequenz aufweist. 7. Verfahren nach Anspruch 2, das weiter Generieren eines dritten Signals entsprechend dem zweiten bevorzugten Strahlmuster zur Sendung an den Drahtlosknoten aufweist. 8. Verfahren nach Anspruch 7, das weiter Unterstützen der Sendung des dritten Signals sequenziell durch unterschiedliche Sendestrahlmuster zum Empfang, durch den Drahtlosknoten, des Signals durch das bevorzugte Empfangsstrahlmuster aufweist; oder das weiter Unterstützen der Sendung des dritten Signals durch das bevorzugte Sendestrahlmuster, das durch die Vorrichtung unterstützt wird, zum Empfang durch den Drahtlosknoten durch das bevorzugte Empfangsstrahlmuster, das durch den Drahtlosknoten unterstützt wird, aufweist. 9. Verfahren nach Anspruch 7, wobei jedes der ersten und zweiten Signale die gleiche Trainingssequenz aufweist, und wobei das dritte Signal durch Codieren einer Sequenz, die dem zweiten bevorzugten Strahlmuster entspricht, mit der Trainingssequenz generiert wird.. Verfahren nach Anspruch 1, das weiter Unterstützen der Sendung des ersten Signals sequenziell durch unterschiedliche Sendestrahlmuster aufweist, und zwar ein oder mehrere Male durch jedes der unterschiedlichen Sendestrahlmuster. 11. Verfahren nach Anspruch 1, das weiter Folgendes aufweist: Unterstützen von A R unterschiedlichen Empfangsstrahlmustern; und Empfangen des zweiten Signals sequenziell durch die A R unterschiedlichen Empfangsstrahlmuster, und zwar N T mal durch jedes der A R unterschiedlichen Empfangsstrahlmuster, wobei N T die Anzahl unterschiedlicher Sendestrahlmuster ist, die durch den Drahtlosknoten unterstützt wird. 13. Verfahren nach Anspruch 1, das weiter Trainieren aufweist, was die Generierung des ersten Signals zur Sendung und des Empfangs des zweiten Signals von dem Drahtlosknoten beinhaltet, wobei das Training gleichzeitig durchgeführt wird, während ein oder mehrere andere Paare von Drahtlosknoten Training durchführen; und wobei vorzugsweise das Training über Zeit-, Frequenz- oder Codedimensionen hinweg durchgeführt wird. 14. Eine Vorrichtung zur Drahtloskommunikation, die Folgendes aufweist: Mittel zum Generieren (2) eines ersten Signals, das eine Trainingssequenz, die durch eine TrainingsSequenzID bzw. trainingsequenceid spezifiziert wird, zur Sendung an einen Drahtlosknoten aufweist, um dem Drahtlosknoten zu ermöglichen, ein erstes bevorzugtes Beambzw. Strahlmuster zu bestimmen; Mittel zum Bestimmen (4) eines zweiten bevorzugten Strahlmusters aus einem zweiten Signal, das eine Trainingssequenz, die durch eine trainingsequenceid spezifiziert wird, aufweist, das von dem Drahtlosknoten empfangen wird; und Mittel zum Kommunizieren (6) mit dem Drahtlosknoten durch das erste und/oder zweite bevorzugte Strahlmuster; wobei die Trainingssequenz des ersten Signals eine Walsh-Sequenz oder eine Golay-Sequenz aufweist und die Trainingssequenz des zweiten Signals eine Walsh-Sequenz oder eine Golay-Sequenz aufweist. Unterstützen von A T unterschiedlichen Sendestrahlmustern; und Unterstützen der Sendung des ersten Signals sequenziell durch die A T unterschiedlichen Sendestrahlmuster, und zwar N R mal durch jedes der A T unterschiedlichen Sendestrahlmuster, wobei N R die Anzahl unterschiedlicher Empfangsstrahlmuster ist, die durch den Drahtlosknoten unterstützt werden. 12. Verfahren nach Anspruch 1, das weiter Folgendes aufweist: Ein Computerprogrammprodukt zur Kommunikation, das Folgendes aufweist: ein maschinenlesbares Medium, das Instruktionen aufweist, die ausgeführt werden können zum Durchführen des Verfahrens nach einem der Ansprüche 1 bis 13. Revendications 1. Procédé de communication sans fil, comprenant : générer un premier signal comprenant une séquence d apprentissage spécifiée par un identificateur ID de séquence d apprentissage pour 8

9 1 EP B1 16 émission vers un noeud sans fil pour permettre au noeud sans fil de déterminer un premier motif de faisceau préféré ; déterminer un deuxième motif de faisceau préféré à partir d un deuxième signal comprenant une séquence d apprentissage spécifiée par un ID de séquence d apprentissage reçu du noeud sans fil ; et communiquer avec le noeud sans fil par l intermédiaire d au moins l un du premier ou du deuxième motif de faisceau préféré ; dans lequel la séquence d apprentissage du premier signal comprend une séquence de Walsh ou une séquence de Golay et la séquence d apprentissage du deuxième signal comprend une séquence de Walsh ou une séquence de Golay. 2. Procédé selon la revendication 1, dans lequel : le premier motif de faisceau préféré comprend un motif de faisceau d émission préféré supporté par un dispositif et un motif de faisceau de réception préféré supporté par le noeud sans fil ; et le deuxième motif de faisceau préféré comprend un motif de faisceau d émission préféré supporté par le noeud sans fil et un motif de faisceau de réception préféré supporté par le dispositif. 3. Procédé selon la revendication 2, comprenant en outre la réception d un troisième signal correspondant au premier motif de faisceau préféré à partir du noeud sans fil. 4. Procédé selon la revendication 3, dans lequel la réception du troisième signal, qui est émis séquentiellement par l intermédiaire de motifs de faisceau d émission différents par le noeud sans fil, se fait par l intermédiaire du motif de faisceau de réception préféré supporté par le dispositif.. Procédé selon la revendication 3, dans lequel la réception du troisième signal, qui est émis par l intermédiaire du faisceau d émission préféré par le noeud sans fil, se fait par l intermédiaire du motif de faisceau de réception préféré supporté par le dispositif. 6. Procédé selon la revendication 3, dans lequel chacun des premier et deuxième signaux comprend la même séquence d apprentissage, le procédé comprenant en outre le décodage du troisième signal avec la séquence d apprentissage. 7. Procédé selon la revendication 2, comprenant en outre la génération d un troisième signal correspondant au deuxième motif de faisceau préféré pour émissionvers le noeud sans fil Procédé selon la revendication 7, comprenant en outre le support de l émission du troisième signal séquentiellement par l intermédiaire de motifs de faisceau d émission différents pour une réception par le signal de noeud sans fil par l intermédiaire du motif de faisceau de réception préféré ; et/ou comprenant en outre le support de l émission du troisième signal par l intermédiaire du motif de faisceau d émission préféré supporté par le dispositif pour une réception par le noeud sans fil par l intermédiaire du motif de faisceau de réception préféré supporté par le noeud sans fil. 9. Procédé selon la revendication 7, dans lequel chacun des premier et deuxième signaux comprend la même séquence d apprentissage, et dans lequel le troisième signal est généré en codant une séquence correspondant au deuxième motif de faisceau préféré avec la séquence d apprentissage.. Procédé selon la revendication 1, comprenant en outre le support de l émission du premier signal séquentiellement par l intermédiaire de motifs de faisceau d émission différents, une ou plusieurs fois par l intermédiaire de chacun des motifs de faisceau d émission différents. 11. Procédé selon la revendication 1, comprenant en outre : supporter A T motifs de faisceau d émission différents ; et supporterl émission du premier signal séquentiellement par l intermédiaire des A T motifs de faisceau d émission différents, N R fois par l intermédiaire de chacun desa T motifs de faisceau d émission différents, où N R est le nombre de motifs de faisceaude réception différents supporté par le noeud sans fil. 12. Procédé selon la revendication 1, comprenant en outre : supportera R motifs de faisceau de réception différents ; et recevoir le deuxième signal séquentiellement par l intermédiaire des A R motifs de faisceau de réception différents, N T fois par l intermédiaire de chacun des A R motifs de faisceau de réception différents, oùn T est le nombre de motifs de faisceau d émission différents supporté par le noeud sans fil. 13. Procédé selon la revendication 1, comprenant en outre un apprentissage comprenant la génération du premier signal pour émission et la réception du deuxième signal à partir du noeud sans fil, l apprentissage étant réalisé simultanément pendant qu une 9

10 17 EP B1 18 ou plusieurs autres paires de noeuds sans fil réalisent un apprentissage ; et de préférence dans lequel l apprentissage est réalisé dans au moins l une d une dimension temporelle, fréquentielle ou de code. 14. Dispositif de communication sans fil, comprenant : des moyens pour générer (2) un premier signal comprenant une séquence d apprentissage spécifiée par un identificateur ID de séquence d apprentissage pour émission vers un noeud sans fil pour permettre au noeud sans fil de déterminer un premier motif de faisceau préféré ; des moyens pour déterminer (4) un deuxième motif de faisceau préféré à partir d un deuxième signal comprenant une séquence d apprentissage spécifiée par un ID de séquence d apprentissage reçu du noeud sans fil ; et des moyens pour communiquer (6) avec le noeud sans fil par l intermédiaire d au moins l un du premier ou du deuxième motif de faisceau préféré ; dans lequel la séquence d apprentissage du premier signal comprend une séquence de Walsh ou une séquence de Golay et la séquence d apprentissage du deuxième signal comprend une séquence de Walsh ou une séquence de Golay. 1. Produit programme d ordinateur pour des communications, comprenant : 1 2 un support lisible par une machine comprenant des instructions exécutables pour réaliser le procédé de l une quelconque des revendications 1 à

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14 EP B1 REFERENCES CITED IN THE DESCRIPTION This list of references cited by the applicant is for the reader s convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard. Patent documents cited in the description US A [0001] US A1 [00] 14