TW201251359A - Data aggregate point (DAP) as a multiple-input multiple-output (MIMO) coordination point - Google Patents

Abstract

A method for multiple-input multiple-output (MIMO) communications between wireless transmit and receive units (WRTUs) includes receiving, at a aggregate point (DAP), data from a plurality of wireless transmit/receive units (WTRUs), aggregating, at the DAP, the data received from the plurality of WTRUs to provide an aggregate signal, transmitting the aggregate signal to at least two of the plurality of WTRUs for re-transmission, and determining a coding scheme for re-transmission of the data by the at least two of the plurality of WTRUs.

Description

201251359 VI. Description of the invention: [Technical leadership of the invention] _ι] The application of the relevant application also refers to the application of the application for the application of 61/478, 622 of April 25, 2010, the application of the application The content is incorporated herein by reference. This application relates to wireless communications. [Prior Art] [0002] Machine type communication (MTC) is a form of data communication including one or more entities that do not require manual interaction. The service optimized for MTC may be different from the service optimized for human f) for human communication, and may be different from current mobile network communication services, the differences may involve different market scenarios, data communication, lower cost and effort, For a wide range of examples, the communication terminal β μ τ C device having a large number of messages per terminal has a large number of traffic, including a measurement device and a tracking device. The classification of features that have been defined for MTC (each classification brings different design challenges) can include time-controlled access, time tolerance, packet-only switching (PS), online small data transmission, offline small data transmission, Mobile S only, rare (four) termination, MTC monitoring, offline indication, human interference indication, priority alert message (PAM), additional low power consumption, secure connection, location specific trigger, and group based MTC features. Group-based management and group-based addressing. SUMMARY OF THE INVENTION [0003] A method for multiple input multiple output (MIMO) communication between wireless transmission and reception units (WTRUs), today, earth a. &

The 忐5海 method includes: receiving data from a plurality of WTRUs (WTRu) at an aggregation point (DAP 1013321689-0); 1011145#^ A〇101 Page 3 / Total Page 201251359 Aggregation at the DAP ( Aggregating) a reassembly received from the plurality of WTRs to provide an aggregated signal; transmitting the aggregated signal to at least two of the plurality of WTRUs for retransmission; and by at least two of the plurality of WTru A coding scheme for retransmission of the data is determined. [Embodiment] [0004] With the application of the MTC system, various devices having different capabilities are imagined to operate under different conditions. One type of device that can be used to play a significant role in MTC applications is the "low mobility" device. These devices can move infrequently, move within restricted areas (restrict mobility), or not move at all. Another type of device that can play a significant role is the concentrator or data aggregation point (DAp), which provides up-link (UL) and downlink (DL) services for local MTC devices, saving power brigade and reducing the load associated with network items. And packet load. For MTC devices, power consumption and range can be a problem. There is also concern about the potential for a large number of devices to operate in a given area, which may result in heavy loads on ranging and network access resources, but each MTC device may only have a small amount of data to transmit. 〇 MTC devices can be small and limited in power (eg due to size and available power). (10) Can be used to aggregate sine and/or DL data for multiple MTC devices. For DAP, the sexual use instance can have a local Xia device connected to the DAP and upload data. However, the fine p can transmit the aggregated data to the network base station. However, this scenario does not exploit the spatial diversity of DAP-local MTC devices. Another common feature for current OFDM systems is multi-user mim, where two or more independent radio terminals can simultaneously transmit pre-coded 1013321689-0 data to enhance and/or direct the transmitted signals. Multi-user 诵 10111451#单号A〇101 Page 4 of 41 201251359 Enhance ranging while reducing interference. In the embodiments described herein, multiple MTC devices may transmit pre-coded turbulence to the base station. As an example, instead of aggregating and transmitting data from a local MTC device, it is better to aggregate the data and apply precoding, and return the precoded ΜIM0 stream to several of the capabilities of coordinated transmission to the base station. ]||1<(:Spot. As another example, the DAP may pass the precoder information to the MTC device along with the data that is not precoded. Once the precoder information and the unprecoded data are received, The MTC device can generate the precoded data stream by itself. FIG. 1A is a schematic diagram of an exemplary communication system 100 in which one or more disclosed embodiments can be implemented. The communication system 100 can be a multiple access system, Wireless users provide content, such as voice, data, video, messaging, broadcast, etc. The communication system 1 can enable multiple wireless users to access the content via sharing of system resources, including wireless bandwidth. For example, communication system 100 can use one or more channel access methods, such as code division multiple access (CDMA), time division multiple access (TDMA) ), frequency division multiple access (FDMA), orthogonal FDMA (OFDM), single carrier FDMA (SC-FDMA), etc. As shown in FIG. 1A, the communication system 1 may include a wireless transmit/receive unit (WTRU). 102a, 102b, l2c, l2d, radio access network (RAN) 104, core network 106, public switched telephone network (PSTN) 108, internet 110 and other networks 112, but it should be understood The disclosed embodiments contemplate any number of WTRUs, base stations, networks, and/or network elements. Each of the WTRUs 102a, 102b, 102c, 102d may be configured to operate in a wireless environment and/or 1011145 #单编请01 Page 5 of 41 Page 1013321689-0 201251359 Any type of device of communication. As an example, the WTRUs 102a, 102b, 102c, 102d may be configured to transmit and/or receive wireless signals, and may include user equipment ( UE), mobile station, fixed or mobile subscriber unit, pager, cellular telephone, personal digital assistant (PDA), smart phone, notebook, mini-notebook, personal computer, wireless sensor, consumer electronics Product, etc. Communication system 100 can also include base station 114a and base station 114b. Each base station 114a, 114b can be any type of device configured to wirelessly connect at least one of WTRUs 102a, 102b, 102c, 102d to facilitate access to one or more Communication networks, such as core network 106, internet 110, and/or network 112. As an example, base stations 114a, 114b may be base transceiver stations (BTS), node B, eNodeB, home node B, Home eNodeB, site controller, access point (AP), wireless router, and more. Although base stations 114a, 114b are depicted as a single component, it should be understood that base stations 114a, 114b can include any number of interconnected base stations and/or network elements. The base station 114a may be part of the RAN 104, which may also include other base stations and/or network elements (not shown), such as a base station controller (BSC), a radio network controller (RNC), Following the node and so on. Base station 114a and/or base station 114b may be configured to transmit and/or receive wireless signals within a particular geographic area, which may be referred to as a cell (not shown). The cell can be further divided into cell sectors. For example, a cell associated with base station 114a can be divided into three sectors. Thus, in an embodiment, base station 114a includes three transceivers, i.e., one sector for each sector of the cell. In another embodiment, the base station 114a can use multiple input multiple output (MIMO) technology, 10111451 (Ρ 纽 01 01 page 6 / 41 pages 1013321689-0 201251359 and thus can use multiple transceivers for cells Each sector base station 114a, 114b may be in communication with one or more of the WTRUs 102a, 102b, 102c, 102d via an air interface 116, which may be any suitable wireless communication link (eg, radio frequency ( RF), microwave, infrared (IR), ultraviolet (UV), visible light, etc. The air interface 116 can be established using any suitable radio access technology (RAT).

More specifically, as noted above, the communication system can be a multiple access system and can utilize one or more channel access schemes, such as CDMA π

U, TDMA, FDMA, OFDMA, SC-FDMA, etc. For example, the base station U4a and the WTRUs 1〇2a, 1〇2b, 1〇2c in the RAN 104 can be used as a radio technology of the (4) telecommunication line (UMTS) secret reduction access (UTRA), which can be used. Broadband c wake up (WCDMA) to establish air interface 116. A communication protocol may be included, such as a sneaky packet access (10) (1) and/or an evolved HSPA (HSP^i) HSPA may include a high speed down key packet access (10) DpA) and/or a high speed uplink packet access (HSUp). In this manner, base station 114a and WTRUs 1G2a, 102b' 102c may implement a radio technology, such as Evolved Legs $ Terrestrial Radio Access (E UTRA), which may use Long Term Evolution (LTE) and/or Enhanced LTE [alpha]. To establish the silk interface 116. In other embodiments, base station u4a and WTRUs 102a, 102b, 102c may implement radio technologies such as 隠16 (ie, global

Microwave Interoperability Access (WlMAX), CDMA2000, CDMA2000 IX CDMA20 00 EV-DO, Provisional Standard 2〇〇〇 (IS_2〇〇〇), Provisional Standard 95 (IS~95, gA·pi Λ®), Temporary Standard 856 (IS_856) 'Global 1013321689-0 1011145#WA〇101 ^71/^41! 201251359 Mobile Communication System (GSM), GSM Evolution Enhanced Data Rate (EDGE), GSM EDGE (GERAN), etc. The base station H4b in Figure 1A may be, for example, a wireless router, a home Node B, a home e-Node b or an access point, and may use any suitable RAT to facilitate localized areas such as commercial premises, homes, vehicles, campuses, and the like. Wireless connection. In one embodiment, the base station U4b and the rating 1?111〇2 (;, 102 (1 may implement a radio technology such as 1 ££802.1 1 to establish a wireless local area network (WLAN). In another Implementation

The medium base station 114b and the WTRUs 102c, 102d may implement a radio technology such as IEEE 802.15 to establish a wireless personal area network (WPAN). In still another embodiment, base station U4b and WTRUs 〇2c, l2d may utilize a cellular-based RAT (eg, WCDMA, CDMA2000, GSM, LTE, LTE-A, etc.) to establish picocells or femtocells. yuan. As shown in Figure 1A, base station 114b may have a direct connection to Internet 110. Thus, base station 114b may not have to access Internet 110 via core network 106. The RAN 104 can communicate with a core network 106, which can be configured to provide voice, data, applications, and/or to one or more of the WTRUs 2a, 102b, 102, 2, 2d Any type of network for Voice over Internet Protocol (VoIP) services. For example, core network 1 〇 6 may provide call control, billing services, mobile location based services, prepaid calling, internet connectivity, video distribution, etc., and/or perform high level security functions such as user authentication. Although not shown in FIG. 1A, it should be understood that RAN 104 and/or core network 1 可以 6 may communicate directly or indirectly with the same RAT as the RAN 104 or a different RAN. For example, in addition to being connected to rAN 10111451# single number A 〇 101 page 8 / 41 page 1013321689-0 201251359 104 using E-UTRA radio technology, core network 106 can also be used with GSM radio technology. Another RAN (not outstanding) communicates. The core network 106 also < acts as a gateway for the WTRUs 2a, i〇2b, 102c, 102d to access the PSTN 1〇8, the Internet 110, and/or other networks 112. The PSTN 108 may include a circuit switched telephone network that provides plain old telephone service (p〇TS). The Internet 110 may include a global system interconnecting computer networks and devices that use public communication protocols, such as the Transmission Control Protocol (TCP) in the TCP"P) Internet Protocol suite, and User Datagram Protocols. (UDP) and Internet Protocol (ip) 〇. Network 112 may include a wired or wireless communication network that is owned and/or operated by other service providers. For example, network 112 may include another core network connected to one or more rans. The ran may use the same RAT as ran 104 or a different rat. Some or all of the WTRUs 〇2a, 102b, 〇2c, 〇2d in the ubiquity system 100 may include multi-mode capabilities, ie, the WTRUs 〇2a, 〇2b, 102c, 102d may include different wireless links. Multiple transceivers that communicate with different wireless networks. For example, the subscription i〇2c shown in FIG. u may be configured to communicate with the base station 114& and the base station 114a may use a cellular-based radio technology, the base station 114b may use 1EEE 802 radio technology. Figure 1B is a system diagram of an exemplary ffTRU 1〇2. As shown in FIG. _, the WTRU 102 may include a processor 118, a transceiver 12, a transmission/reception component 122, a speaker/microphone 124, a keyboard 126, a display/touchpad 128, a removable memory 130, and a removable The memory 132, the power supply 134, the global clamp system (GPS) chip set 136, and other peripheral devices 138H understand that when maintained and implemented, ^1010145#^ A〇101 page 9 / total 41 pages 1013321689-0 201251359 l〇2 may include any sub-combination of the aforementioned elements. The processor 118 can be a general purpose processor, a special purpose processor, a conventional processor, a digital signal processor (DSP), a plurality of microprocessors, one or more microprocessors associated with the DSP core, a controller, a micro control , dedicated integrated circuit (ASIC), field programmable gate array (fpga) circuit, any other type of integrated circuit (1C), state machine, and so on. The processor 118 can perform signal coding, data processing, power control, input/rounding processing, and/or any other functionality that enables the WTRU 102 to operate in a wireless environment. The processor 118 can be coupled to a transceiver 12 that can be coupled to the transmit/receive element 122. While FIG. 1B illustrates processor 118 and transceiver 120 as separate components, it should be understood that processor 118 and transceiver 120 can be integrated together in an electronic package or wafer. The transmit/receive element 122 can be configured to transmit signals to, or receive signals from, the base station (i.e., the base station 114a) via the air interface 116. For example, in an embodiment, the transmit/receive widget 122 can be an antenna configured to transmit and/or receive RF signals. In another embodiment, the transmit/receive element 122 can be an illuminator/detector configured to transmit and/or receive, for example, IR, UV, or visible light signals. In still another embodiment, the transmit/receive element 122 can be configured to transmit and receive both RF and optical signals. It should be understood that the transmit/receive element 122 can be configured to transmit and/or receive any combination of wireless signals. A single number 1011145 ΚΓ Further 'Although the transmission/reception element 122 is shown as a single element in FIG. 1B, the WTRU 102 may include any number of transmission/reception elements 122. More specifically, WTRU 1 〇 2 can use the mim 〇 technology. Thus, in a single embodiment, the WTRU 102 may include two or more transmission/reception elements 12 2 that transmit and receive wireless signals via the air interface 116 (eg, multiple Antennas). The transceiver 120 can be configured to modulate signals transmitted by the transmit/receive component ι 22 and demodulate signals received by the transmit/receive component 122. The WTRU 102 may have multi-mode capabilities as described above. Thus, the transceiver 12A can include a plurality of transceivers that enable the WTRU 102 to communicate via multiple RATs. The plurality of RATs are, for example, UTRA and IEEE 802.1. The processor 118 of the WTRU 102 can be coupled to, and can receive user input from, a speaker/microphone 124, a keyboard 126, and/or a display/touchpad 128 (eg, a liquid crystal display (LCD) display unit). Or organic light-emitting diode (0LED) display unit). The processor 118 can also output user data to the speaker/amplifier 124, keyboard 126, and/or display/trackpad 128. In addition, the processor 118 can access information from any type of appropriate memory and can store the data in any type of appropriate memory, such as non-removable memory 13 〇 0 and/or removable memory. 132. The non-removable memory 130 may include random access memory (RAM), read only memory (R〇M), a hard disk, or any other type of memory device. The removable memory 132 can include a User Identity Module (SIM) card, a memory stick, a secure digital (sd) memory card, and the like. In other embodiments, the processor 118 may access information from a memory that is not physically located on the WTRU 102 (e.g., on a server or a home computer (not shown), and may store the data in the memory. in. The processor 118 can receive power from the power source 134 and can be configured to knife and/or control power to other elements in the WTRU 102. Electricity 10111451. Order No. A〇m Page 11 of 41 1013321689-0 201251359 Source 134 may be any suitable device for powering the WTRU 102. For example, the power source 134 may include one or more dry battery packs (ie, nickel (NiCd), nickel (NiZn), nickel metal hydride (NiMH), lithium ion (Li-ion), etc.), solar cells, fuel cells. and many more. Processor 118 may also be coupled to a set of GPS chips 136 that may be configured to provide location information (i.e., longitude and latitude) with respect to the current location of the WTRU 102. In addition to or in lieu of information from GPS chipset 136, WTRU 102 may receive location information from base stations (i.e., base stations 114a, 114b) via air interface 116 and/or based on two or more adjacent base stations. The received signal timing determines its position. It should be understood that the WTRU 102 may obtain location information via any suitable location determination method while maintaining consistency of implementation. The processor 118 can also be coupled to other peripheral devices 138, which can include one or more software and/or hardware modules that provide additional features, functionality, and/or wired or wireless connections. For example, peripheral device 138 may include an accelerometer, an electronic compass, a satellite transceiver, a digital camera (for image or video), a universal serial bus (USB) port, a vibration device, a television transceiver, and a hands-free headset. , Bluetooth® module, FM radio unit, digital music player, media player, video game console module, internet browser, etc. Figure 1C is a system diagram of RAN 104 and core network 106, in accordance with an embodiment. As noted above, the RAN 104 can communicate with the WTRUs 102a, 102b, 102c via the air interface 116 using UTRA radio technology. The RAN 104 can also be in communication with the core network 106. As shown in FIG. 1C, the RAN 104 may include Node Bs 140a, 140b, 140c, where each Node B includes one or more transceivers for use with the WTRUs 102a, 102b, 102c via the 10111451 order number A0101 page 12/total 41 pages 1013321689-0 201251359

The air interface 116 communicates. The Node Bs 140a, 140b, 140c may be associated with particular cells (not shown) in the RAN 104. The RAN 104 may also include RNCs 142a, 142b. It should be understood that the RAN 104 may include any number of Node Bs and RNCs as shown in FIG. 1C, and Node Bs 140a, 140b may communicate with the RNC 142a, in keeping with the embodiments. Additionally, Node B 140c can communicate with RNC 142b. Node Bs 140a, 140b, 140c can communicate with respective RNCs 142a, 142b via an Iub interface. The RNCs 142a, 142b can communicate with each other via the Iur interface. Each RNC 142a, 142b can be configured to control a respective Node B 140a, 140b, 14〇c to which it is connected. In addition, each RNC 142a, 142b can be configured to perform or support additional functions such as outer loop power control, load control, admission control, packet scheduling, handover control, macro diversity, security functions, data encryption, and the like. The core network 1 〇 6 as shown in FIG. 1C may include a media gateway (MGW) 144, a mobile switching center (MSC) 146, a serving GPRS support node (SGSN) 148, and/or a gateway GPRS support node (GGSN). 150. While each of the preceding elements is described as part of the core network 1-6, it should be understood that any of these elements may be owned and/or operated by an entity other than the core network operator. The RNC 142a in the RAN 104 can be connected to the MSC 146 in the core network 106 via the IuCS interface. The MSC 146 can be connected to the MGW 144. MSC 146 and MGW 144 may provide WTRUs 102a, 102b, 102c with access to circuit-switched networks, such as PSTN 108, to facilitate communication between 102a '102b' 102c and conventional landline communication devices. The RNC 142a in the RAN 104 can also be connected to the SGSN 148 in the core network 1013321689-0 10111451 (f.single number A〇1〇l page 13/41 pages 201251359 106 via the IuPS interface. ςΓςΜ 6GSN 148 can be associated with GGSN 150 Connecting the SGSN 148 and the GGSN 15 can provide the WTRUs 〇2a, 102b, 102c with access to the packet-switched network, for example, the network 11{), to facilitate the side-to-side, 1〇2_ enabling Communication between devices. As noted above, core network 1G6 can also be coupled to network 112, which can include wired or wireless networks that are owned and/or operated by other service providers. Figure 2 is a k-number diagram showing an exemplary communication for a multi-input multi-output (MIM) method, and Figures 3, 4, and 5 are steps in the method. Block diagram. In the examples shown in FIGS. 2 and 3, the MTC devices (for example, the MTC devices 第, 2, and 3 in FIG. 2, and the MTC devices in FIG. 3, 2, 3, 4, 5, and 6) A low power signal is transmitted to the DAp using a single radio capable of transmitting directly to the base station. The DAP can aggregate the data and determine the appropriate scheme for subsequent cooperative transmissions. Depending on various factors, such as channel conditions, the MP may choose, for example, closed loop spatial multiplexing, open loop spatial multiplexing, or open loop diversity (ie, space-time/frequency encoding) schemes. In the examples shown in Figures 2 and 4, based on the selected cooperation scheme, the DAP transmits (using low power) aggregated data and other control information to the selected MTC device (eg, device 1 in Figure 2 and 2 and the MTC devices 1 and 6) in Fig. 4. In the examples shown in Figures 2 and 5, the selected MTC device processes and transmits the ΜI Μ 0 signal to the base station at a time or times specified by the DAP. While all devices are capable of transmitting signals, there may be situations where some devices are unable to reach the AP but are able to reach the DAP. In Fig. 2, for example, device 3 cannot participate in aggregation 1^, which may be 1013321689-0 1〇m45# single number A_ page/total 41 page 201251359 疋 because it cannot reach B S. ❹ If the closed-loop space multiplex is selected as the cooperative transmission scheme, Bei Qing can transmit the device __, or _ can (4) send the unpreloaded: 峨 and precoder information. Use precoder information: To perform precoding operations locally. Utilizing the latter method, it is possible to take advantage of the fact that the material fraction of the polymer material f can be known. Decoding the known data at the MTC device can be inserted into the system bit sequence and improve decoder performance. Therefore, the transmission efficiency of DAP to MTC can be improved. Similarly, in an open-loop diversity scheme, the DAp may transmit spatial_time (frequency) encoded data to the selection C device, or may choose to transmit the original aggregated data to the MTC device to utilize the MTC device as described above. Known data bits at the location. The mtc device can then perform Z-space-time (frequency) coding locally, and P can also decide to use cyclic delay diversity ((10)) in the coordinated rounds, where each device can be at a different time offset specified by the DAP. Transfer data. ❹ 2 In the cooperative scheme mentioned above, it may be necessary to have all aggregated data available at the selected MTC skirt. Preferably, all aggregated data bits can be jointly encoded by a channel encoder (e.g., a Turb0 encoder, a conventional encoder, or an LPDC encoder). The DAP can also send control information to the (4) device' so that the MTC device can locate the bit originating from itself and treat the bit as a known bit during the decoding process.

If the multiplex space is selected as the cooperative transmission scheme, each (4) may only need to receive some aggregated data. DAP can decode data separately. The transmission order at DAp to MTC can use orthogonal transmission (e.g., TDMA 1011145#^ or CDMA). In order to improve the spectral efficiency, the gift can be simultaneously transmitted to multiple MTC devices on the same radio A_ 帛 15 pages / 41 pages 1013321689-0 201251359 resources (MU-MIM0).

Figure 6 is a signal diagram showing an exemplary communication for a method of multi-input multiple-input multiple-output (ΜΙΜΟ), and Figures 7, 8, and 9 are block diagrams showing steps in the method. . In the first phase (examples shown in Figures 6 and 7), the base station can transmit selectable MTC devices (i.e., mtc devices 1, 2 and 3 and Figure 7 in Figure 6). MTC devices 1 and 6) aggregated data detected. The modulation and marting scheme (MCS) selected in the first phase transmission may be excessive 'so that the MTC device may not be able to successfully decode the aggregated material. However, each MTC device can relay the received signal to the DAP in the second stage pass (examples shown in Figures 6 and 8) - once received and merged from the MTC device Signals can improve overall signal quality. Therefore, DAP may be able to decode the aggregated data. As an example, two different relays can be considered. If all MTC devices are relayed at the same time, when the DAP is reached, the relayed signals can be combined in the air, resulting in a better signal SNIN if the signals from the relay of the M2M device do not overlap in time or frequency, Then the DAP base frequency can observe the respective signals relayed by each selected mtc dynasty. "Substantially" each MTC device can perform an action like a DAP's distributed antenna. A more advanced Mim(R) receiver can then be used to improve the down key reception at the DAP. In the third phase, in the example shown in Figure 6 and Figure 9, the DAP can de-aggregate the data into smaller packets and transmit the smaller packets to the respective receivers (eg Figure 6) MTC devices 1, 2 and 3 and MTC installations in Figure 9] i, 2, 3, 4, 5 and 6). In the third phase, the DAp can simultaneously transmit multiple MTC devices on a given block of radio resources. In order to eliminate user interference, a suitable precoder number* A0101 can be obtained according to a specific standard. 1011145ΚΡ No. Page 16 of 41 1013321689-0 201251359 For example, you can use zero-forcing precoder information. The DAP can communicate with the MTC device using separate frequencies or radio techniques as described below. Each MTC device can be equipped with two radios (e.g., Bluetooth/WiFi and WiMax) and can transmit the data to the DAp via a short range (e.g., Bluetooth/WiFi) radio. Mp can aggregate the data and transmit the aggregated (precoded or not precoded) data to the MTC device. The selected MTC device can then process and transmit the chirp signal to the base according to the DAP specified cooperation scheme. station. Initially, a capacity communication may be required. When ^(: device registers with DAP, the following capabilities can be negotiated (in addition to existing capability negotiation): M2M device power (eg, whether it is powered by battery); in addition to DAP, can the MTC device directly Base station communication; whether the MTC device can transmit cooperation; and the MTC device transmitter specific conditions (such as maximum power, antenna gain, etc.) In addition, the MTC device can periodically measure the radio link between the MTc device and the base station. Quality is reported to the DAP. MTC devices with good link quality with the base station are more likely to be selected by the DAP to participate in subsequent coordinated transmissions. Data transfer to DAP can follow any normal procedures currently in existence. For DAP The chain is transmitted to the base station, and the mtc device selected for coordinated transmission can receive the data from the dap and transmit it at an appropriate time. Once the data received from the device is aggregated, the DAP can send a request to the base station to request Authorization for uplink transmission. After receiving the uplink transmission authorization, it can specify the transmission (four) sequence and its Attributes, such as the gong command 'can obtain timing information for the coordinated traversing wheel and page pp. 1013321689-0 201251359 to send it to the selection e-device. DAP can also "MTe_ power control commands, making them The transmission power can be adjusted accordingly, and all transmissions from the selected MTC device should arrive at the base station simultaneously in the uplink "(sub)frame. In some cases 9 can guide the muscle device" so that the signal it transmits is slightly Different arrival base stations (ie in CDD mode). Alternatively, the DAP can coordinate the selected MTC device to request the uplink pass authorization. In this method, the device can transmit the UL at the time specified by the DAP. Transmission request. Even if the base station may not know the join of the device, the DAP and the selected MTC device can improve the signal-to-noise ratio (SNR) observed by the ground station. Then each of the selected MTC devices can monitor the downlink control channel transmitted from the base station for a certain period of time in order to receive the transmission authorization. The selected subscription device can also monitor The downlink (4) track from the DAP to receive the UL grant forwarded by the DAp. The UL allocation for the DAP coordination can be addressed to the cooperative set as a group (eg, the UL assigned receiver can be pre-allocated Group identification (ID) identified by the group). As long as the station in the cooperative set is listening to the DL, the station can be notified of its UL MIM〇 transmission of the allocated radio link resources without any station. The station relays the UL allocation information. Alternatively, the UL allocation for the UL ΜΙΜΟ transmission of the DAP coordination may be addressed to the DAP or the specific station in the cooperation set, and the recipient of the 讥 allocation may need to relay the allocation information to the Other stations in the collaboration collection. In this example, the offset between the UL allocation information element (iE) transmission and the assigned ULh source is defeated < needs to be set to be sufficient to accommodate the cooperation set 1013321689-0 10111451 (^单单Α〇1(Π第The processing and transmission time of all stations in the 18 pages/to 41 pages of 201251359, and the UL allocation information for cooperative UL transmissions are obtained in time. Such requirements may not be met by some such as 802. 1 6e and 802.1 1 6m. The existing air interface design is sufficient. Therefore, changes in the UL allocation mechanism may be required to provide a suitable offset for the proposed DAp coordinated UL ΜΙΜΟ transmission. For DAP coordinated DL ΜΙΜΟ schemes, the stations in the cooperative set should be in the appropriate Receive mode, and have the correct information to receive and decode the corresponding DL ΜΙΜΟ transmission. For example, in the 8〇2·16m system, the stations in the cooperative set need to receive the DL allocation information element (ιέ) to obtain the confirmation about the dl transmission. Thereby the DL transmission is correctly received and decoded. Therefore, the DL allocation IE should be provided to the stations in the cooperation set in time for the station to properly receive the DL. ΜΙΜΟ Transmission. Similar to UL, one method is to set the receiver of the DL allocation IΕ as a group of cooperative sets. As long as the station is listening to the DL when the DL allocation IE is transmitted, the station will correctly receive the DL allocation IE. No station is required to relay the DL allocation IE. For closed-loop multiplex operation in coordinated transmission mode, it may be necessary for the MTC device to periodically measure channel state information (CSI) and forward the measured CSI to DAP 'to make DAP Appropriate precoder information can be obtained. To support the downlink MU-MIM0 (from DAP to MTC device), the DAP can transmit reference symbols to enable the MTC device to estimate the channel between the DAP and the MTC device and feed it back to the DAP. In the TDD system, an alternative may be for the TC device to transmit the sounding reference symbol so that the DAP can measure the channel. After the DAP obtains the channel information, a suitable pre-fetch can be obtained via feedback from the MTC device or via over-detection. Encoder information to support MU-MIM0.

In the first and second phase transmissions (MTC device to DAP and from DAP to MTC 10111451), the transmitter can receive the desired receiver from the receiver. ACK/NACK message and retransmit the ACK/NACK message if needed. In the third phase of transmission (eg coordinated transmission), the base station can send an ACK/NACK message to the DAP. If all data or a subset of data Not correctly received at the base station (indicated by the NACK message), the ijDAP can determine the portion of the data to be retransmitted and send a command to the MTC device, and then the MTC device retransmits the portion of the data that was not correctly received. And the HARQ acknowledgment is provided to the cooperative set as a group, and then the synchronized UL HARQ procedure can work as the current situation, as long as all the stations in the cooperative set can correctly receive the DL from the BS, wherein the synchronized UL HARQ refers to the use of the synchronization weight Allocating the allocated UL HARQ scheme (for example, UL HARQ specified in 802.1 1m and Long Term Evolution (LTE)). However, if UL allocation and HARQ acknowledgment are provided to the station requesting UL allocation Device or DAP), and the allocation and corresponding HARQ acknowledgment need to be signaled to the cooperating set, then the synchronized UL HARQ scheme may need to have a more common interval between the synchronized UL retransmission allocations (eg, 802.1m) Synchronize the four subframes in UL HARQ) longer intervals. This may be due to the additional processing and transmission time required for UL allocation information and HARQ bursting to propagate to all stations. Unsynchronized UL HARQ can use the proposed The DAP coordinated UL scheme works as long as the UL allocation for transmission and retransmission can be provided to the stations in the cooperation set in a timely and appropriate manner. The DAP coordinated UL scheme is used for the stations from bs to the cooperation set. For DL data, after completing DL diversity combining/decoding, the HARQ acknowledgment can be transmitted by the DAP and/or one or more designated stations. If retransmission is required, information about retransmission can be provided to the cooperation set^ 13321689-0 10111451#Single number A〇101 Page 20 of 41 All the stations in 201251359, so that the station can receive retransmissions properly. The concept of a cover describes a network that includes a "single layer" of aggregation between an MTC device and a base station. However, this can also be applied to aggregation of two or more layers (eg, as shown in Figure 10). For example, the local DAP can collect data from several MTC devices and send the aggregated packets to the wide area DAP. The wide area DAP can use the same tricky technique as described above, where the local DAP works like a smart antenna. The same change can be applied to the DL, where the wide-area DAP can collect and process signals received by other DAPs (and/or MTC devices), apply ΜΙΜΟ processing to the signals, and distribute the de-aggregated feedback to the local DAP ( It can cancel the aggregation in turn and distribute the de-aggregated feedback to the MTC device. This extension can be applied to the aggregation and processing of multiple layers. Embodiment 1 A method for multiple input multiple output (MIMO) communication between a plurality of wireless transmission and reception units (WTRUs), the method comprising: receiving, at an aggregation point (ΜΡ), from a plurality of wireless transmissions/receptions Unit (WTRU) data; aggregating data received from the plurality of WTRUs at the DAP to provide an aggregated signal; transmitting the aggregated signal to at least two of the plurality of WTRUs for retransmission; and by The at least two of the plurality of WTRUs determine an encoding scheme for retransmission of the material. 2. The method of embodiment 1, the method further comprising: receiving, by the WTRU, data and retransmission information, the retransmission information being used to indicate when the data was retransmitted. 10111451#单单纲01 Page 21 of 41 1013321689-0 201251359 3. The method of embodiment 2, the method further comprising: retransmitting the data at a time indicated by the retransmission information. 4. The method of embodiments 1-3 wherein the received and retransmitted data is aggregated data from a plurality of WTRUs. 5. The method of embodiment 4 wherein the received data is precoded. 6. The method of embodiment 1-5 wherein the received data is not precoded and the WTRU further receives precoder information having data that is not precoded. 7. The method of embodiment 6 further comprising, prior to retransmitting the received data, the WTRU performing a pre-matrix operation on the unprecoded material. 8. The method of embodiment 1-7 wherein the received data is space-time encoded. 9. The method of embodiment 1-8 wherein the received data is not space-time encoded, the method further comprising performing space-time coding on the received data. 10. The method of embodiment 2-9 wherein the retransmission information indicates when the data was retransmitted and the time to retransmit the data is the same time for the plurality of WTRUs. 11. The method of embodiment 2-10, wherein the retransmission information indicates a time at which the data was retransmitted, and the time to retransmit the data is based on cyclic delay diversity (CDD) for each of the plurality of WTRUs Say different times. 12. The method of embodiment 11, wherein the WTRU is a machine type communication (MTC) device. The method of embodiment 12, further comprising periodically measuring the quality of the radio link between the WTRU and the base station, 1011145#单号A〇101, page 22 of 41, 1013321689-0, 201251359. And report the measured radio link quality to the Data Aggregation Point (DAP). 14. The method of embodiments 2-13, wherein the scheme for retransmission of the data is one of a closed loop spatial multiplexing scheme and an open loop spatial multiplexing scheme, and the aggregated signal includes Coded material. 15. A wireless transmit/receive unit (WTRU), the WTRU comprising: a receiving unit configured to receive data and retransmit information, the retransmission information indicating a time to retransmit the tribute, and a transmitting unit configured to be configured The data is retransmitted at the time indicated by the retransmission information. Although the above features and elements are described in a particular combination, those of ordinary skill in the art can understand that each feature or element can be used alone or in combination with other features and elements in any combination. In addition, the methods described herein can be implemented in a computer program, software or firmware, which can be embodied in a computer readable medium executed by a computer or processor. Examples of computer readable media include electrical signals (transmitted via wired or wireless connections) and computer readable storage media. Examples of computer readable storage media include, but are not limited to, read only memory (ROM), random access memory (RAM), scratchpad, cache memory, semiconductor memory devices, such as internal hard disks and removable magnetic Magnetic media, magneto-optical media, and optical media such as CD-ROM magnetic disks and digital versatile magnetic disks (DVD). A processor associated with the software can be used to implement the radio frequency transceiver for use in a WTRU, UE, terminal, base station, RNC, or any host computer. BRIEF DESCRIPTION OF THE DRAWINGS [0005] A more detailed description of the examples given in conjunction with the drawings given below can be obtained by the detailed description of 10111451 (f. single number A 〇 101 ^ 23 I / ^ 41 1 1013321689-0 201251359) It is understood that: FIG. 1A is a system diagram of an exemplary communication system in which one or more disclosed embodiments may be performed; the first is an exemplary wireless transmission/reception for the communication system shown in FIG. 1A System diagram of a unit (WTRU); Figure 1C is a system diagram of an exemplary radio access network and an exemplary core network for the communication system shown in Figure 1A; Figure 2 is for uplinking ( Ul) a signal diagram of an exemplary communication shown by the method of multiple input multiple output (MIM〇);

Fig. 3 is a block diagram showing a step shown in the method of UL 第 shown in Fig. 2; Fig. 4 is a block diagram showing the UL step shown in Fig. 2; Another step

Figure 5 is a block diagram showing the method of UL 示出 shown in Figure 2; and Figure 6 is a block diagram showing the method of the lower chain (DL) ΜΙΜΟ.

Fig. 7 is a block diagram of the DL step shown in Fig. 6; another step of the method of DL MI Μ0 which is not shown in Fig. 8 and Fig. 6 shown in the method of ΜΙΜΟ a block diagram; a ninth diagram is a block diagram showing steps in the method of DL 示出 shown in FIG. 6; and a splicable 10th diagram is an exemplary communication of the illustrated method for the ΜΙΜΟ method Multi-layered signal diagram. [Main component symbol description] [0006] 1 0 0 : Exemplary communication system 10111451 (^单单Α〇101 page 24/total 41 page 1013321689-0 201251359 102, 102a, 102b, 102c, 102d: wireless transmission/reception Cell (WTRU) 104: Radio Access Network (RAN) 10 6 : Core Network 108: Public Switched Telephone Network (PSTN) 110: Internet 112: Other Networks 114a, 114b: Base Station 11 6 : Air Interface 118: Processor 120: Transceiver 122: Transmitting/Receiving Element 124: Speaker/Microphone 126: Keyboard 128: Display/Touchpad 130: Non-Removable Memory 132: Removable Memory 134: Power 136: GPS Chip set 138: other peripheral devices

140a, 140b, 140c, 140d: Node B 142a, 142b: Radio Network Controller (RNC) 144: Media Gateway (MGW) 146: Mobile Switching Center (MSC) 148: Serving GPRS Support Node (SGSN) 150: Gate GPRS Support Node (GGSN) 10111451 (P No. A_ Page 25 / Total 41 Page 1013321689-0 201251359 I ur : Interface

IuCS, IuPS, Iub, DAP: Aggregation point UL: Winding ΜΙΜΟ·. Multiple input and multiple output DL: Down chain

Ο 1Q111451 (p number Α0101 1013321689-0 page 26 of 41

Claims (1)

201251359 VII. Patent Application Range: 1. A method for a multiple input multiple output (MIMO) communication between a plurality of wireless transmission and reception units (WTRUs), the method comprising: receiving at a convergence point (DAP) a profile from a plurality of WTRUs that aggregate the data received from the plurality of WTRUs to provide an aggregated signal at the DAP; transmitting the aggregated signal to at least two of the plurality of WTRUs The WTRU is for retransmission; and 0 determines, by the at least two of the plurality of WTRUs, a coding scheme for retransmission of the data. 2. The method of claim 1, wherein the method further comprises: receiving, by the WTRU, data and a retransmission information indicating a time at which the data was retransmitted. 3. The method of claim 1, wherein the method further comprises: retransmitting the item at the time indicated by the retransmission information. The method of claim 3, wherein the received and retransmitted data is an aggregated data from a plurality of WTRUs. 5. The method of claim 1, wherein the received data is precoded. 6. The method of claim 1, wherein the received data is not precoded, and the WTRU further receives a precoding information having the unprecoded material. 7. The method of claim 6, the method further comprising: before retransmitting the received data, the WTRU is in the unprecoded loimsnP number A_ page 27/41 pages 1013321689- 0 201251359 A precoding operation is performed on the data. 8. The method of claim i, wherein the received data is space-time encoded. 9. The method of claim i, wherein the received data is not space-time encoded, the method further comprising performing space-time coding on the received data. 10. The method of claim 2, wherein the retransmission information indicates a time at which the data is retransmitted, the time at which the data was retransmitted is the same time for a plurality of WTRUs. 11. The method of claim 2, wherein the retransmission information indicates a time at which the data is retransmitted, the time at which the data is retransmitted is based on a cyclic delay diversity (CDD) for a plurality of WTRUs. Different time for each of the WTRUs. 12. The method of claim 1, wherein the order (four) is a machine type communication (MTC) device. 13. The method of claim 1, further comprising periodically measuring a radio link quality between the WTRU and a base station and reporting the measurement to a data aggregation point (DAP) Radio link quality. 14. The method of claim 2, wherein the determined scheme for retransmission of the material is one of a closed loop spatial multiplexing scheme and an open loop spatial multiplexing scheme, and the aggregation The signal includes a pre-coded data 〇15. A WTRU (WTru) WTRU includes: a receiving unit configured to receive a data and a retransmission information, the weight 1013321689-0 transmission information indicating A time at which the data is retransmitted; and 10111451 (^单号 A〇i〇i page 28/41 pages 201251359 a transmission unit configured to retransmit the data at the time indicated by the retransmission information. 10111451 (P number should be 01 page 29 / total 41 page 1013321689-0