WO2010048747A1 - 用于多通道harq接收反馈的方法、装置和设备 - Google Patents

用于多通道harq接收反馈的方法、装置和设备 Download PDF

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Publication number
WO2010048747A1
WO2010048747A1 PCT/CN2008/001828 CN2008001828W WO2010048747A1 WO 2010048747 A1 WO2010048747 A1 WO 2010048747A1 CN 2008001828 W CN2008001828 W CN 2008001828W WO 2010048747 A1 WO2010048747 A1 WO 2010048747A1
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WIPO (PCT)
Prior art keywords
feedback
harq
channel
slot
information
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PCT/CN2008/001828
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English (en)
French (fr)
Inventor
王栋耀
冷晓冰
沈钢
金珊
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上海贝尔股份有限公司
阿尔卡特朗讯
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Application filed by 上海贝尔股份有限公司, 阿尔卡特朗讯 filed Critical 上海贝尔股份有限公司
Priority to PCT/CN2008/001828 priority Critical patent/WO2010048747A1/zh
Priority to CN200880130766.4A priority patent/CN102124684B/zh
Publication of WO2010048747A1 publication Critical patent/WO2010048747A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1822Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1825Adaptation of specific ARQ protocol parameters according to transmission conditions
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829Arrangements specially adapted for the receiver end
    • H04L1/1854Scheduling and prioritising arrangements

Definitions

  • the present invention relates to communication technologies, and more particularly to a multi-channel HARQ reception feedback method, apparatus and apparatus for an OFDMA wireless communication system. Background technique
  • the wireless channel is a variable channel, and the environment in which it is located is also very complicated.
  • the signal at the receiving end there are not only fading and shadow caused by the geographical environment, but also the Doppler shift caused by the movement, and it is also affected by various interferences and noises caused by the open channel structure. These fading and interference are prone to random errors and burst errors that will seriously affect the quality of the transmission. Therefore, error control technology must be used to improve the transmission quality of the signal, thus ensuring reliable transmission of information.
  • HARQ forward error correction
  • ARQ error detection plus automatic repeat request
  • HARQ hybrid automatic repeat request
  • FEC forward error correction
  • ARQ error detection plus automatic repeat request
  • HARQ hybrid automatic repeat request
  • the basic idea of HARQ is that the correct reception of data packets can be obtained by combining multiple error packets. Based on this idea, the receiving end does not directly discard the received corrupted data packet, but informs the transmitting end to resend the data packet or the redundant information of the data packet. In this way, after receiving the retransmission information, the receiving end performs Soft Combining with the original damaged data packet, thereby achieving efficient error recovery. It is this high performance that HARQ is playing an increasingly important role in wireless communications and has become one of the foundation technologies for next-generation wireless communication systems.
  • HARQ implementations In wireless communication systems, HARQ implementations generally employ a Stop-and-Wait (SW) protocol. After the service sender sends a data packet, it starts to wait for the feedback information ACK of the data packet sent by the receiver. Feedback message ACK indicates the packet Was successfully received. The feedback message NAK indicates that the data packet is received incorrectly, and the sender will retransmit the data packet or its redundant information. Due to the use of the stop-and-wait protocol, the HARQ sender needs to wait for the confirmation of the previous packet before sending the next packet. As shown in Figure 1, this single-channel HARQ scheme not only limits the rate of service data, but also A waste of system capacity.
  • SW Stop-and-Wait
  • the multi-channel HARQ mechanism provides a way to solve the above problems.
  • several single-channel HARQ processes serve a certain service flow at the same time, and each channel adopts a stop-and-wait protocol. as shown in picture 2. Since multiple HARQ processes are simultaneously performed side by side on one transport physical channel, system resources can be fully utilized.
  • OFDMA Orthogonal Frequency Division Multiplexing Access
  • OFDMA has been considered as the basic technology of B3G and 4G wireless communication systems.
  • multi-channel HARQ can provide strong support. Supports transmitting a connected data in a multi-channel HARQ manner in a system based on IEEE 802.16e (Standard for Local and metropolitan area networks) Mobile WiMAX (World Interoperability for Microwave Access) .
  • IEEE 802.16e Standard for Local and metropolitan area networks
  • Mobile WiMAX Worldwide Interoperability for Microwave Access
  • the system in order to maximize the service rate of the service link, the system arranges the HARQ packets of the multiple HARQ channels of the connection in the same downlink subframe. Under the synchronous HARQ mechanism, the system also arranges for the terminal to feed back the HARQ data packets in the same uplink subframe after a certain time.
  • the multi-channel HARQ implementation method used in existing systems has some shortcomings.
  • the existing system adopts a fixed mode for the feedback of the HARQ channel, that is, regardless of the condition of the wireless channel, one ACK channel occupies three 4x3 time-frequency resource tiles, and the structure diagram of the time-frequency resource slice is as shown in the figure. 3, where M h ( l ⁇ h ⁇ 8 ) is 8 data subcarriers in the tile structure, and the rest are pilot subcarriers.
  • M h ( l ⁇ h ⁇ 8 ) is 8 data subcarriers in the tile structure, and the rest are pilot subcarriers.
  • This approach does not optimize the utilization of wireless resources.
  • multiple HARQs in multi-channel HARQ The channels belong to the same connection, but they are processed separately when controlling these HARQ channels, which is easy to cause information redundancy. For example, if a feedback mode is set for multiple HARQ channels of a connection, the control information needs to be sent for each HARQ
  • the present invention proposes a scheme for flexibly setting a multi-channel HARQ feedback region according to the current conditions of the channel.
  • the multi-channel HARQ feedback area is composed of one or more feedback slots, and the number of feedback information bits carried by the feedback slot is determined according to channel conditions.
  • the number of feedback slots is determined by the number of HARQ channels currently fed back and the feedback of the feedback slots.
  • the number of information bits is determined.
  • a method for multi-channel HARQ receive feed can include: receiving M HARQ data packets, wherein the M is an integer greater than 1; generating M HARQ data packet feedback information; determining a multi-channel HARQ feedback region for the M HARQ data packets, wherein the multi-channel
  • the HARQ feedback area is composed of P feedback slots, P is a natural number; and M HARQ packet feedback information is sent in the multi-channel HARQ feedback area.
  • the feedback slot is composed of a two-dimensional time-frequency resource, and the feedback slot size is a symbol Ni x carrier N2, wherein the feedback slot parameters N1 and N2 are natural numbers.
  • each feedback slot carries N-bit information, and the size of N is determined according to user channel quality, wherein the better the channel quality, the larger the N value, and N is a natural number.
  • the number P of the feedback slots is rounded up by the number of HARQ channels currently to be fed back and the bit information bits carried by the feedback slot by using the following formula.
  • the feedback slots in the multi-channel HARQ feedback region are sorted according to a carrier priority or a symbol priority rule.
  • the ACK of the M HARQ packets Or the NAK feedback information is encoded into an M-bit codeword, where the kth bit represents the ACK or NAK feedback information of the kth channel's HARQ packet.
  • the M-bit codeword is sent in the following manner, the first N-bit will be mapped to the first feedback slot of the multi-channel HARQ feedback region, and the second N-bit mapping To the second feedback slot, and so on, until the last L bit (L ⁇ N), by adding 0 or 1 at the high bit, the last L bit is mapped to the next feedback slot.
  • the method is for an OFDMA wireless communication system.
  • the feedback slot parameters N1 and N2 and the number of bits N carried by the feedback slot are obtained according to the received feedback zone parameter message.
  • the multi-channel HARQ belongs to the same service connection.
  • the multi-channel HARQ belongs to a receiving end.
  • each channel of the multi-channel HARQ uses a stop and wait manner for data packet transmission.
  • an apparatus for multi-channel HARQ receive feedback may include: a receiving unit, configured to receive M HARQ data packets, where the M is an integer greater than 1; a generating unit, configured to generate M HARQ data packet feedback information; and a determining unit, configured to be M HARQs
  • the data packet determines a multi-channel HARQ feedback region, wherein the multi-channel HARQ feedback region is composed of P feedback slots, P is a natural number, and a feedback unit is configured to send M HARQ packet feedbacks in the multi-channel HARQ feedback region. information.
  • the feedback slot is composed of a two-dimensional time-frequency resource, and the feedback slot size is a symbol Ni x carrier N2, wherein the feedback slot parameters N1 and N2 are natural numbers.
  • each feedback slot carries N-bit information, and the size of N is determined according to user channel quality, wherein the better the channel quality, the larger the N value, N For natural numbers.
  • the number P of the feedback slots is determined by the following formula from the number of HARQ channels currently to be fed back and the number of bit information N carried by the feedback slot, and " "]
  • the feedback slots in the multi-channel HARQ feedback region are ordered according to a carrier priority or a symbol priority rule.
  • the ACK or NAK feedback information of the M HARQ data packets is encoded into an M-bit codeword, where the kth bit represents the ACK of the HARQ data packet of the kth channel. Or NAK feedback information.
  • the M-bit codeword is transmitted in the following manner, the first N bits will be mapped to the first feedback slot of the multi-channel HARQ feedback region, and the second N bits are mapped to The second feedback slot, and so on, up to the last L bit (L ⁇ N), by adding 0 or 1 to the high bit, the last L bit is mapped to the next feedback slot.
  • the apparatus is for an OFDMA wireless communication system.
  • the feedback slot parameters N1 and N2 and the number of bits N carried by the feedback slot are obtained according to the received feedback zone parameter message.
  • the multi-channel HARQ belongs to the same service connection.
  • the multi-channel HARQ belongs to a receiving end.
  • each channel of the multi-channel HARQ uses a stop and wait mode for packet transmission.
  • a communication device comprising the above apparatus for multi-channel HARQ reception feedback.
  • the communication device is a terminal device, a base station, or a relay station device.
  • a communication system including the above communication device.
  • the communication system is an OFDMA wireless communication system.
  • the number of feedback information carried by the feedback slot is determined according to channel conditions, and the number of feedback slots is determined by the number M of HARQ channels currently to be fed back and the number of feedback information bits carried by the feedback slot.
  • the present invention regards multi-channel HARQ process multi-channel as a whole, and sets a multi-channel feedback area for multiple channel HARQ processes.
  • the multiple HARQ channels adopt the same control mode, one-time multi-channel HARQ feedback, only
  • the message sent by the network device indicates the size of the feedback slot and the number of feedback information bits carried by the feedback slot, and does not need to be multiple
  • the HARQ channel is controlled separately, which simplifies control, avoids redundancy of control information, improves system resource utilization efficiency, and improves system efficiency.
  • Figure 1 shows a schematic diagram of single channel HARQ transmission
  • Figure 2 shows a schematic diagram of multi-channel HARQ transmission
  • FIG. 3 is a schematic structural diagram of a time-frequency resource slice
  • FIG. 4 shows a schematic diagram of a multi-channel HARQ feedback zone according to an embodiment of the present invention
  • FIG. 5 shows a schematic block diagram of an apparatus for multi-channel HARQ reception feedback according to an embodiment of the present invention
  • FIG. 6 shows a schematic flowchart of a method for multi-channel HARQ reception feedback according to an embodiment of the present invention
  • Figure 7 shows a network diagram of multi-channel HARQ feedback using an embodiment of the present invention
  • Figure 8 is a diagram showing a comparison of system performance simulations and prior art system performance simulations in accordance with an embodiment of the present invention.
  • Embodiments of the present invention are based on WiMAX (IEEE 802.16e) system implementation, but the invention is not limited thereto and may be based on any system supporting multi-channel HARQ.
  • WiMAX IEEE 802.16e
  • the embodiment of the present invention assumes that the network end device of the OFDMA wireless communication system is a base station, and the multi-channel HARQ feedback parameter is set by the network end device, and the transmitting end of the multi-channel HARQ process is the base station, and the receiving end is the terminal device.
  • the base station sets a feedback slot of the multi-channel HARQ to be a UL PUSC (Uplink Partial Usage of Subchannels), and is composed of six 4 (carrier) x3 (symbol) tiles.
  • the structure of a tile is shown in Figure 3, where M h ( l ⁇ h ⁇ 8 ) is 8 data subcarriers in the tile structure, and the rest are 4 pilot subcarriers.
  • the size of the feedback slot N1 (carrier) xN2 (symbol) can be set to 12 (carrier) ⁇ 6 (symbol); or 8 (carrier) ⁇ 9 (symbol); or 4 ( Carrier) 18 (symbol); or 24 (loaded) ⁇ 3 (symbol).
  • a feedback slot has a total of 48 data subcarriers, modulated with QPSK, and can be designed to carry 1, 2, 3, 4 or more bits of information.
  • a multi-channel HARQ feedback area is composed of at least one or more feedback slots, and multiple feedback slots are sorted according to a carrier priority or symbol priority rule.
  • the feedback slot parameters N1, N2 are sent by the base station to the terminal device.
  • the base station After a service connection of the terminal device (user) is initialized, the base station sets up a multi-channel HARQ process to serve the service flow, and the multi-channel HARQ process of the service connection supports up to 16 channels. In the Kth frame, the base station selects 8 channels and sends them. The eight HARQ data packets, that is, the channel number M of the multi-channel HARQ is equal to eight. Then, the base station allocates a multi-channel HARQ feedback area for the eight channels, and the size of the multi-channel HARQ feedback area, that is, the number of multi-channel HARQ feedback slots, is carried by the number of HARQ channels currently being fed back and the multi-channel HARQ feedback slot. The number of feedback information bits is determined, specifically expressed as:
  • each feedback slot is specified by the base station for the user according to the channel condition of the user. For example, if the channel condition of the user is good, each feedback slot can be designated to carry more information. Such as 4 digits. If the channel conditions of the user are poor, in order to ensure that the feedback information has certain reliability, the base station can specify that each feedback slot carries less information, such as 3 bits.
  • the transmission of information is explained using only 4 bits as an example, and the like can be analogized.
  • the base station BS can allocate a feedback area with two multi-channel HARQ feedback slots for the above eight channels, and the feedback slot size is six tiles.
  • the terminal device may include a device 500 for multi-channel HARQ receiving feedback
  • the receiving feedback device 500 may include a data packet receiving unit 501 and a feedback information generating unit 502.
  • the packet receiving unit 501 is configured to receive 8 HARQ packets from the transmitting end, that is, the base station.
  • the received 8 HARQ data packets are demodulated and decoded.
  • the feedback information generating unit 502 is configured to determine whether each HARQ packet is correct according to the check information such as the CRC carried by the HARQ packet, and then generate an acknowledgement message for each ARQ packet, for example, 0 indicates ACK, that is, reception Correct, V means NAK, that is, receiving error, so that a total of 8 HARQ packet feedback information is generated.
  • the ACK or NAK feedback information of the 8 HARQ packets is encoded into an 8-bit codeword, and the kth bit represents the ACK or NAK feedback of the HARQ packet of the kth channel. Information. Assuming that the generated codeword is 0x13 ( ObOOOlOOl l ), it indicates that the 1, 2, and 5 HARQ packets are not correctly received, and the BS will be required to perform retransmission.
  • the receiving feedback device 500 may further include a feedback area determining unit 503.
  • the feedback area determining unit 503 is configured to receive feedback area parameter information from the base station, and determine a multi-channel HARQ feedback area for the 8 HARQ data packets according to the information of the multi-channel HARQ feedback area sent by the receiving base station.
  • the feedback zone determines that the vehicle element 503 receives the feedback slot parameter N1 from the base station equal to 12, N2 equals 6, N, etc.
  • the number of feedback slots is equal to 2 (8 divided by 4), and the multi-channel HARQ feedback region is determined by two feedback slots of 12 (carrier) x6 (symbol).
  • the receiving feedback device 500 of the terminal device may further include a feedback unit 504 for transmitting eight HARQ channel ACK or NAK feedback information in the multi-channel HARQ feedback region.
  • the feedback unit 504 divides the 8-bit feedback information codeword into two parts according to the feedback zone parameter, the first 4 bits of information (0001) are modulated on the first feedback slot of the feedback area, and the last 4 bits of information (0011) are modulated. Two feedback slots. Then, in the (K+H) frame, the terminal device sends the modulated feedback information to the base station, that is, the HARQ data packet transmitting end, where H is the offset between the transmission frame of the HARQ data packet and the acknowledgement (offset). .
  • the base station After the base station sends eight multi-channel HARQ data packets in the Kth frame, the multi-channel HARQ data packet is no longer sent, that is, the multi-channel HARQ data packet is stopped, but the feedback information of the terminal device is waited for.
  • the base station receives the feedback information sent by the MS, which can decode to obtain 0x13, so that the first, 2, and 5 HARQ packets are sent for retransmission, and the next multi-channel HARQ transmission frame is retransmitted. These packets.
  • the number of feedback information bits carried by the feedback slot is determined according to channel conditions, and the number of feedback slots is determined by the number M of HARQ channels currently to be fed back and the number of feedback information bits carried by the feedback slot, the channel The better the condition, the more feedback information bits are carried by the feedback slot, and the smaller the feedback area required. That is to say, the size of the feedback area is flexibly determined according to the number of HARQ channels currently required to be fed back and the current channel conditions, which can effectively save radio resources and realize rational use of radio resources.
  • FIG. 6 shows a schematic flow chart of a method for multi-channel HARQ reception feedback according to an embodiment of the present invention.
  • the packet receiving unit 501 receives M HARQ packets, wherein the M is an integer greater than one.
  • the feedback information generating unit 502 generates M HARQ packet feedback information.
  • the feedback region determining unit 503 determines a multi-channel HARQ feedback region for the M HARQ data packets, wherein the multi-channel HARQ feedback region is composed of P feedback slots, and P is a natural number.
  • the feedback area determining unit 503 receives the feedback slot parameter N1 from the base station equal to 12, N2 equals 6, and N equals 4.
  • the number of feedback slots is equal to 2 (8 divided by 4)
  • the multi-channel HARQ feedback region is determined by two feedback slots of 12 (carrier) x6 (symbol).
  • the feedback unit 504 transmits M HARQ packet feedback information in the multi-channel HARQ feedback region.
  • FIG. 8 is a schematic diagram showing a system performance simulation according to an embodiment of the present invention and a system performance simulation of the prior art. It can be seen that if the multi-channel HARQ mode defined in IEEE 802.16e is used, it is under any channel condition. It is necessary to use 4 OFDMA slots to implement feedback of each ACK or NAK. The size of the feedback area increases linearly with the number of HARQ channels, and the embodiment of the present invention optimizes according to channel conditions, and the channel conditions are good. In this case, fewer resources can be used to achieve the same goal. As the number of HARQ channels increases, more resources can be saved by using the method of the embodiment of the present invention.
  • the embodiment of the present invention treats multiple channels of the multi-channel HARQ process as a whole, and multiple HARQ channels adopt the same control mode, and one-time multi-channel HARQ feedback, only needs to send a message by the network device to indicate the size of the feedback slot. And the number of feedback information bits carried by the feedback slot does not need to be separately controlled for the multiple HARQ channels, so that the control can be controlled, the redundancy of the control information is avoided, the utilization efficiency of the system resources is improved, and the working efficiency of the system is improved.
  • the multi-channel HARQ process of the multi-service connection of the single-user terminal can also be derived. If a user (terminal device) has J service flows, the base station transmits the J service flows through the M HARQ channels in the Kth frame. 3 ⁇ 4
  • the multi-channel HARQ implementation manner of the single service connection is the same.
  • the data packet receiving unit 501 of the receiving feedback device 500 of the terminal device receives the seven HARQ data packets belonging to different service flows from the base station, demodulation and decoding, and feedback.
  • the information generating unit 502 determines whether each HARQ data packet is correct according to the check information such as the CRC carried by the HARQ data packet, and then generates an acknowledgement message for each HARQ data packet, where 0 indicates ACK, that is, the reception is correct, and 1 indicates the NAK. That is, receiving errors, so that a total of 7 HARQ packet feedback information is generated.
  • the feedback area determining unit 503 receives the feedback area parameter information from the base station, and determines a multi-channel HARQ feedback area for the seven HARQ data packets according to the information of the multi-channel HARQ feedback area sent by the receiving base station.
  • the base station sets the number of feedback information bits N of the multi-channel HARQ feedback slot to be 3, and the feedback area size is determined as three feedback slots.
  • the feedback unit 504 then transmits 7 HARQ channel ACK or NAK feedback information in the multi-channel HARQ feedback area.
  • the feedback unit 504 divides the 7-bit feedback information codeword into two parts according to the feedback zone parameter, the first 3 bits of information are modulated on the first feedback slot of the feedback area, and then the 3 bits of information are modulated on the second feedback slot.
  • the last 1-bit information is first added to the high-order 0 to 3 bits of information and then modulated on the third feedback slot.
  • the terminal device sends the modulated feedback information to the base station, that is, the HARQ data packet transmitting end, where H is the offset between the transmission frame and the acknowledgement frame of the HARQ data packet (offset). .
  • the base station After transmitting the 7 multi-channel HARQ data packets of the above two services in the Kth frame, the base station does not continue to send the multi-channel HARQ data packet, that is, stops transmitting the multi-channel HARQ data packet, and waits for the feedback information of the terminal device.
  • the base station receives the feedback information sent by the terminal device, and retransmits the data packets belonging to the two service flows in the next multi-channel HARQ transmission frame according to the decoding information.
  • the above embodiment illustrates that the present invention is applicable not only to a multi-channel HARQ process for single-service connection but also to a multi-channel HARQ process for multi-service connection of a single-user terminal.
  • FIG. 7 is a schematic diagram of a network employing multi-channel HARQ feedback using an embodiment of the present invention, the network including a base station 701, a terminal device 702, and relay stations 703 and 704.
  • the multi-channel HARQ process of the present invention may occur between base station 701 and terminal device 702, between base station 701 and relay stations 703 and/or 704, between relay stations 703 and/or 704 and terminal device 702, or between relay station 703 and relay station 704. between.
  • the device in the above multi-channel HARQ process can be both a transmitting end and a receiving end.
  • the above devices each include a receiving feedback device 500.
  • the invention can be implemented in hardware, software, firmware, and combinations thereof.
  • the present invention may also be embodied in a computer program product disposed on a signal bearing medium for use by any suitable data processing system.
  • signal bearing media can be a transmission media or a recordable media for machine readable information, including magnetic media, optical shields, or other suitable media.
  • recordable media include: disks or floppy disks in a hard disk drive, optical disks for optical drives, magnetic tape, and other media as will occur to those of skill in the art.
  • any communication terminal having suitable programming means will be capable of performing the steps of the inventive method as embodied in the program product.

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Description

用于多通道 HARO接收反馈的方法、 装置和设备 技术领域
本发明涉及通信技术, 尤其涉及用于 OFDMA 无线通信系统的 多通道 HARQ接收反馈方法、 装置和设备。 背景技术
在未来的无线通信中, 随着通信业务的不断扩展和服务质量的 提高, 对无线通信的可靠性将提出更高的要求。 然而无线信道是一 种变参信道, 其所处的环境也非常复杂。 对于接收端的信号来说, 不但存在由于地理环境引起的衰落和阴影, 以及移动引起的多普勒 频移, 而且还要受到开放式信道结构带来的各种干扰和噪声的影响。 这些衰落和干扰容易引起随机差错和突发错误, 将严重影响传输质 量。 因此必须采用差错控制技术来提高信号的传输质量, 从而保证 信息的可靠传输。 目前的差错控制技术主要有前向糾错 (FEC)、 检错 加自动重发请求 (ARQ)以及混合自动重发请求 (HARQ)。 作为一种链 路自适应技术, HARQ综合了 FEC与 ARQ的优点, 是 FEC和 ARQ 相结合的一种纠错方法。 与 ARQ技术不同的是, HARQ的基本思想 是数据包的正确接收可通过多个错误数据包的合并来获得。 基于这 种思想, 接收端并不直接丟弃接收到的受损数据包, 而是通知发送 端重发该数据包或者该数据包的冗余信息。 这样, 接收端在接收到 重发信息后, 与原有的受损数据包进行软合并 (Soft Combining) , 从 而可以实现高效的错误恢复。 正是这种高性能, HARQ 在无线通信 领域里扮演着越来越关键的角色, 已成为下一代无线通信系统的基 础技术之一。
无线通信系统中, HARQ 的实现一般采用停止 -等待(SW, Stop-and-Wait)协议。 业务发送端在发送一个数据包后开始等待接收 端发送的该数据包的反馈信息 ACK:。 反馈信息 ACK表明该数据包 被成功接收。 而反馈消息 NAK表明该数据包的接收有误, 发送端将 重传该数据包或其冗余信息。 由于使用停止 -等待协议, HARQ发送 端在发送下一个数据包前需要等待前一个数据包的确认信息,如图 1 所示, 这种单通道 HARQ方式不仅限制了业务数据的速率, 同时也 会造成系统能力的浪费。
' 多通道的 HARQ机制提供了一种解决上述问题的方法。 在这种 方式下, 若干个单通道的 HARQ过程同时服务于某个业务流, 每一 个通道均采用停止-等待的协议。 如图 2所示。 由于在一个传输物理 信道上同时并列进行多个 HARQ 过程, 系统资源可被充分利用。
OFDMA ( OFDMA: Orthogonal Frequency Division Multiplexing Access, 正交频分复用接入)技术是一种日益广泛应用的高数据率宽 带通信技术, 因为它具有较高的频谱效率和对严重延迟扩展的容忍 能力。众所周知, OFDMA已经被认为是 B3G和 4G无线通信系统的 基础技术。 为充分利用 OFDMA的高数据率能力, 多通道的 HARQ 可以为其提供强有力的支持。在基于 IEEE 802.16e (Standard for Local and metropolitan area networks) 的移动 WiMAX ( Worldwide Interoperability for Microwave Access,即^:波存耳又全球互通 )系统中 , 支持以多通道 HARQ的方式来发送一条连接的数据。 该系统的多通 道 HARQ的实现比较简单, 仅被视为并列进行着的多个独立单通道 HARQ过程。 在 OFDMA系统中, 为最大化业务链接的服务速率, 系统会在同一下行子帧中安排这一连接的多个 HARQ通道的 HARQ 数据包。 在同步 HARQ机制下, 系统也会在若干时间后的同一上行 子帧中安排终端对这些 HARQ数据包进行反馈。
现有系统中所采用的多通道 HARQ实现方法存在着一些不足之 处。 首先, 现有系统针对 HARQ信道的反馈采用了固定的模式, 即 不管无线信道条件的好坏,一个 ACK信道均占用 3个 4x3时频资源 片 (tile ) , 时频资源片的结构示意图如图 3所示, 其中 Mh ( l≤h≤8 ) 为 tile结构中的 8个数据子载波, 其余为导频子载波。这种方式不能 实现无线资源利用的最优化。 其次, 多通道 HARQ中的多个 HARQ 通道同属一个连接, 但在控制这些 HARQ通道时分别进行处理, 容 易造成信息的冗余。 例如若对某一连接的多个 HARQ通道设置其反 馈模式, 则需要为每一个 HARQ通道发送该控制信息。 这种处理方 式降低了系统的效率。 发明内容
为解决该问题, 本发明提出了一种根据信道当前条件灵活设置 多通道 HARQ反馈区的方案。 该多通道 HARQ反馈区由一个或多个 反馈槽组成, 反馈槽承载的反馈信息比特数根据信道条件来确定, 反馈槽的个数由当前需反馈的 HARQ通道的数目 M和反馈槽承载的 反馈信息比特数确定。
根据本发明的一个实施方式, 提供一种用于多通道 HARQ接收 馈的方法。 该方法可以包括: 接收 M个 HARQ数据包, 其中所述 M为大于 1的整数;生成 M个 HARQ数据包反馈信息;为 M个 HARQ 数据包确定一个多通道 HARQ反馈区, 其中所述多通道 HARQ反馈 区由 P个反馈槽组成, P为自然数; 以及在所述多通道 HARQ反馈 区发送 M个 HARQ数据包反馈信息。
根据本发明的一个可选实施例, 所述反馈槽由一个二维的时频 资源组成, 反馈槽大小为符号 Ni x载波 N2, 其中反馈槽参数 Nl、 N2均为自然数。
. 根据本发明的一个可选实施例,每个反馈槽承载 N比特信息, N 的大小根据用户信道质量来确定, 其中信道质量越好, N值越大, N 为自然数。
; 根据本发明的一个可选实施例, 所述反馈槽的个数 P通过以下 公式由当前需反馈的 HARQ通道的数目和反馈槽承载的比特信息位 表示上取整,
Figure imgf000005_0001
根据本发明的一个可选实施例, 所述多通道 HARQ反馈区中的 反馈槽按载波优先或符号优先的规则进行排序。
根据本发明的一个可选实施例,所述 M个 HARQ数据包的 ACK 或 NAK反馈信息被编码成一个 M位的码字, 其中第 k位表示第 k 个通道的 HARQ数据包的 ACK或 NAK反馈信息。
居本发明的一个可选实施例, 这 M位的码字采用以下方式进 存发送, 第一个 N位将被映射到多通道 HARQ反馈区的第一个反馈 槽, 第二个 N位映射至第二个反馈槽, 以此类推, 直至最后的 L位 ( L≤N ) , 通过在高位补 0或者 1的方式, 最后的 L位映射至下一个 反馈槽。
才艮据本发明的一个可选实施例, 所述方法用于 OFDMA无线通 信系统。
根据本发明的一个可选实施例, 所述反馈槽参数 N1和 N2、 反 馈槽承载的比特数 N根据接收到的反馈区参数消息得到。
根据本发明的一个可选实施例, 所述多通道 HARQ同属一个业 务连接。
根据本发明的一个可选实施例, 所述多通道 HARQ同属一个接 收端。
才艮据本发明的一个可选实施例, 多通道 HARQ的每个通道均采 用停止与等待的方式进行数据包的发送。
根据本发明的另一个实施方式, 提供一种用于多通道 HARQ接 收反馈的装置。 该装置可以包括: 接收单元, 用于接收 M个 HARQ 数据包, 其中所述 M为大于 1的整数; 生成单元, 用于生成 M个 HARQ数据包反馈信息; 确定单元, 用于为 M个 HARQ数据包确定 一个多通道 HARQ反馈区, 其中所述多通道 HARQ反馈区由 P个反 馈槽组成, P为自然数; 以及反馈单元, 用于在所述多通道 HARQ 反馈区发送 M个 HARQ数据包反馈信息。
根据本发明的一个可选实施例, 所述反馈槽由一个二维的时频 资源组成, 反馈槽大小为符号 Ni x载波 N2, 其中反馈槽参数 Nl、 N2均为自然数。
根据本发明的一个可选实施例,每个反馈槽承载 N比特信息, N 的大小根据用户信道质量来确定, 其中信道质量越好, N值越大, N 为自然数。
所述反馈槽的个数 P通过以下公式由当前需反馈的 HARQ通道 的数目和反馈槽承载的比特信息位数 N决定, 「 "]表示上取
Ν 根据本发明的一个可选实施例, 所述多通道 HARQ反馈区中的 反馈槽按载波优先或符号优先的规则进行排序。
才艮据本发明的一个可选实施例,所述 M个 HARQ数据包的 ACK 或 NAK反馈信息被编码成一个 M位的码字, 其中第 k位表示第 k 个通道的 HARQ数据包的 ACK或 NAK反馈信息。
根据本发明的一个可选实施例, 这 M位的码字采用以下方式进 行发送, 第一个 N位将被映射到多通道 HARQ反馈区的第一个反馈 槽, 第二个 N位映射至第二个反馈槽, 以此类推, 直至最后的 L位 ( L≤N ) , 通过在高位补 0或者 1的方式, 最后的 L位映射至下一个 反馈槽。
根据本发明的一个可选实施例, 所述装置用于 OFDMA无线通 信系统。
根据本发明的一个可选实施例, 所述反馈槽参数 N1和 N2、 反 馈槽承载的比特数 N根据接收到的反馈区参数消息得到。
根据本发明的一个可选实施例, 所述多通道 HARQ同属一个业 务连接。
根据本发明的一个可选实施例, 所述多通道 HARQ同属一个接 收端。
根据本发明的一个可选实施例, 多通道 HARQ的每个通道均采 用停止与等待的方式进行数据包的发送。
. 根据本发明的另一个实施方式, 提供一种通信设备, 包括上述 用于多通道 HARQ接收反馈的装置。 可选地, 所述通信设备为终端 设备、 基站或者中继站设备。
根据本发明的另一个实施方式, 提供一种通信系统, 包括上述 通信设备。 可选地, 所述通信系统为 OFDMA无线通信系统。 由于采用了上述的方案, 反馈槽承载的反馈信息比特数根据信 道条件来确定, 而反馈槽的个数由当前需反馈的 HARQ通道的数目 M和反馈槽承载的反馈信息比特数确定, 信道条件越好, 反馈槽承 载的反馈信息比特越多, 所需的反馈区越小。 也就是说, 反馈区的 大小根据当前需反馈的 HARQ通道数和当前信道条件灵活确定, 能 有效的节省无线资源, 实现无线资源的合理利用。 同时, 本发明将 多通道 HARQ过程的多通道视为一个整体, 为多个通道的 HARQ过 程设置一个多通道反馈区,这多个 HARQ通道采用同样的控制模式, 一次多通道 HARQ反馈, 只需由网络端设备发送一次消息指示反馈 槽的大小以及反馈槽承载的反馈信息比特数, 无需对这些多个
HARQ通道单独进行控制, 从而可简化控制, 避免控制信息的冗余, 提高系统资源的利用效率, 并提高系统的工作效率。 附图说明
通过以下结合附图的说明, 并且随着对本发明的更全面了解, 本发明的其他目的和效果将变得更加清楚和易于理解, 其中:
图 1表示单通道 HARQ传输示意图;
图 2表示多通道 HARQ传输示意图;
图 3表示时频资源片的结构示意图;
图 4表示根据本发明的实施方式的多通道 HARQ反馈区示意图; 图 5表示根据本发明的实施方式的用于多通道 HARQ接收反馈 的装置的示意框图;
图 6表示根据本发明的实施方式的用于多通道 HARQ接收反馈 的方法的示意性流程图;
图 7 表示采用本发明的实施方式的多通道 HARQ反馈的网络示 意图;
图 8 表示根据本发明的实施方式的系统性能仿真与现有技术的 系统性能仿真比较示意图。
在所有的上述附图中, 相同的标号表示具有相同、 相似或相应 的特征或功能。 具体实施方式
以下结合附图具体描述本发明的实施方式。
本发明的实施方式基于 WiMAX ( IEEE802.16e ) 系统实现, 但 本发明并不局限于此, 可基于支持多通道 HARQ的任何系统。
为描述方便, 本发明的实施方式假设 OFDMA无线通信系统的 网络端设备为基站, 由网络端设备设置多通道 HARQ的反馈参数, 多通道 HARQ过程的发送端为基站, 接收端为终端设备。
首先, 基站设置多通道 HARQ的一个反馈槽 (slot ) 为一个 UL PUSC(Uplink Partial Usage of Subchannels , 上行部分使用的子信 道), 由 6个 4 (载波) x3 (符号) tile组成。 一个 tile的结构如图 3 所示, 其中 Mh ( l<h<8 ) 为 tile结构中的 8个数据子载波, 其余为 4 个导频子载波。根据 6个 tile在时频域方向的不同排列,反馈槽的大 小 N1 (载波 ) xN2 (符号 ) 可设置成 12 (载波 ) χ6 (符号) ; 或者 8 (载波) χ9 (符号) ; 或者 4 (载波 ) 18 (符号) ; 或者 24 (载 ) χ3 (符号) 。 一个反馈槽共有 48个数据子载波, 使用 QPSK进 行调制, 可设计承载 1, 2, 3 , 4或更多位信息。 一个多通道 HARQ 反馈区由至少一个或多个反馈槽组成, 多个反馈槽按载波优先或符 号优先的规则进行排序, 图 4中以 6个反馈槽, 载波优先规则排序 进行示例性说明。 本发明的实施方式中, 仅以反馈槽参数 N1 等于 12, N2等于 6, 48个数据子载波采用 QPSK调制为例。 需要说明的 是, 本领域的技术人员可以理解, 上述反馈槽的大小参数以及调制 方式仅为示例性说明, 其它反馈槽大小参数和调制方式 (如 BPSK 或高阶调制) 同样适用于本发明。 反馈槽参数 Nl , N2 由基站发送 给终端设备。
终端设备 (用户) 的一个业务连接在初始化后, 基站设置一个 多通道 HARQ过程服务于该业务流, 该业务连接的多通道 HARQ过 程支持最多 16个通道。 在第 K帧, 基站选择其中 8个通道并发送了 8个 HARQ数据包, 即多通道 HARQ的通道数 M等于 8。 接着, 基 站为这 8个通道分配一个多通道 HARQ反馈区, 多通道 HARQ反馈 区的大小即多通道 HARQ反馈槽的个数由当前需反馈的 HARQ通道 的数目 M和多通道 HARQ反馈槽承载的反馈信息比特数确定,具体 表示为:
M
p =
N
其中 Π表示上取整。 P为多通道 HARQ反馈区的多通道 HARQ 反馈槽的个数, M 当前需反馈的 HARQ 通道的数目, 为多通道 HARQ反馈槽承载的反馈信息比特数。 每个多通道 HARQ反馈槽所 承载的信息比特数 N根据用户的信道条件由基站为该用户指定, 举 例来说, 若用户的信道条件较好, 则可指定每个反馈槽承载较多信 息, 如 4位。 若用户信道条件较差, 为保证反馈信息具有一定的可 靠性, 基站可指定每个反馈槽承载较少信息, 如 3 位。 本实施方式 中仅以 4位作为例子来说明信息的传输, 其它可类推。 这样, 基站 BS可为上述 8个通道分配一个具有 2个多通道 HARQ反馈槽的反馈 区, 反馈槽大小为 6个 tile。
结合图 5 , 具体说明多通道 HARQ接收端的工作过程。 本发明 的实施方式中, 终端设备作为多通道 HARQ接收端, 可以包括一个 用于多通道 HARQ接收反馈的装置 500, 该接收反馈装置 500可以 包括数据包接收单元 501和反馈信息生成单元 502。
具体地, 数据包接收单元 501 被配置为接收来自发送端即基站 的 8个 HARQ数据包。 优选地, 解调并解码接收的 8个 HARQ数据 包。
反馈信息生成单元 502 被配置为根据 HARQ 数据包所携带的 CRC 等校验信息判断每个 HARQ 数据包正确与否, 然后对每个 ARQ数据包产生一个确认信息, 例如, 0表示 ACK, 即接收正确, V表示 NAK, 即接收错误,这样共产生 8个 HARQ数据包反馈信息。 这 8个 HARQ数据包的 ACK或 NAK反馈信息被编码成一个 8位的 码字, 第 k位表示第 k个通道的 HARQ数据包的 ACK或 NAK反馈 信息。 假设所产生的码字为 0x13 ( ObOOOlOOl l ) , 它表示第 1 , 2, 5个 HARQ数据包没有被正确接收, 将要求 BS进行重发。
接收反馈装置 500还可以包括一个反馈区确定单元 503。反馈区 确定单元 503被配置为接收来自基站的反馈区参数信息, 根据接收 基站发来的多通道 HARQ反馈区的信息, 为这 8个 HARQ数据包确 定一个多通道 HARQ反馈区。 在本发明的实施方式中, 反馈区确定 車元 503接收来自基站的反馈槽参数 N1等于 12, N2等于 6, N等 于 4。 根据上述参数, 可得到反馈槽数等于 2 ( 8除以 4 ) , 确定多 通道 HARQ反馈区由 2个 12 (载波) x6 (符号) 的反馈槽组成。
终端设备的接收反馈装置 500还可以包括反馈单元 504,用于在 上述多通道 HARQ反馈区发送 8个 HARQ通道 ACK或 NAK反馈信 息。 反馈单元 504根据反馈区参数, 将 8位反馈信息码字分成两部 分, 前 4位信息 ( 0001 ) 被调制在反馈区的第一个反馈槽上, 后 4 位信息 (0011 )被调制在第二个反馈槽上。 然后, 在第 (K+H ) 帧, 终端设备将调制后的反馈信息发送给基站,即 HARQ数据包发送端, H为 HARQ数据包的发送帧和确认桢之间的偏移量 (offset ) 。
, 基站在第 K帧发送 8个多通道 HARQ数据包之后, 不再继续发 举多通道 HARQ数据包, 即停止发送多通道 HARQ数据包, 而是等 待终端设备的反馈信息。 在第 (K+H ) 帧, 基站接收到 MS 发送的 反馈信息, 它可解码得到 0x13 , 从而知道第 1, 2, 5个 HARQ数据 包发送重发, 在下一个多通道 HARQ发送帧, 重发这些数据包。
: 基于本发明的实施例, 反馈槽承载的反馈信息比特数根据信道 条件来确定, 而反馈槽的个数由当前需反馈的 HARQ通道的数目 M 和反馈槽承载的反馈信息比特数确定, 信道条件越好, 反馈槽承载 的反馈信息比特越多, 所需的反馈区越小。 也就是说, 反馈区的大 小根据当前需反馈的 HARQ通道数和当前信道条件灵活确定, 能有 效的节省无线资源, 实现无线资源的合理利用。
, 图 6示出了根据本发明一个实施方式的用于多通道 HARQ接收反 馈的方法的示意性流程图。 首先, 在步骤 S601处, 数据包接收单元 501接收 M个 HARQ 数据包, 其中所述 M为大于 1的整数。
然后,在步骤 S602处,反馈信息生成单元 502生成 M个 HARQ 数据包反馈信息。
在步骤 S603处, 反馈区确定单元 503为 M个 HARQ数据包确 定一个多通道 HARQ反馈区, 其中所述多通道 HARQ反馈区由 P个 反馈槽组成, P为自然数。 例如, 反馈区确定单元 503接收来自基站 的反馈槽参数 N1等于 12, N2等于 6, N等于 4。 根据上述参数, 可得到反馈槽数等于 2 ( 8除以 4 ) , 确定多通道 HARQ反馈区由 2 个 12 (载波 ) x6 (符号) 的反馈槽组成。
在步骤 S604处,反馈单元 504在所述多通道 HARQ反馈区发送 M个 HARQ数据包反馈信息。
图 8 表示根据本发明的实施方式的系统性能仿真与现有技术的 系统性能仿真比较示意图, 可以看出, 若按 IEEE 802.16e中现有定 义的多通道 HARQ 方式, 则在任何信道条件下均需要使用 4 个 OFDMA槽 (slot )来实现每个 ACK或 NAK的反馈, 反馈区的大小 随 HARQ通道数增加而线性增加, 而本发明实施例则根据信道条件 进行了优化, 在信道条件好的情况下, 可使用较少的资源达到相同 的目标, 随着 HARQ通道数的增加, 使用本发明实施例的方法可节 省更多的资源。
另外, 本发明的实施例将多通道 HARQ过程的多通道视为一个 整体, 多个 HARQ通道采用同样的控制模式, 一次多通道 HARQ反 馈, 只需由网络端设备发送一次消息指示反馈槽的大小以及反馈槽 承载的反馈信息比特数,无需对这些多个 HARQ通道单独进行控制, 从而可筒化控制, 避免控制信息的冗余, 提高系统资源的利用效率, 并提高系统的工作效率。
根据以上基本思想, 还可推导出本发明实施例的单用户终端多 业务连接的多通道 HARQ过程。 假如某个用户 (终端设备) 有 J个 业务流, 在第 K帧时, 基站通过 M个 HARQ通道发送这 J个业务流 ¾| M个 HARQ数据包。 进一步假设 J为 2, M为 7。 如上述单业务 连接的多通道 HARQ实施方式一致, 终端设备的接收反馈装置 500 的数据包接收单元 501接收来自基站的这分属于不同业务流的 7个 HARQ数据包, 解调并解码后, 反馈信息生成单元 502根据 HARQ 数据包所携带的 CRC等校验信息判断每个 HARQ数据包正确与否, 然后对每个 HARQ数据包产生一个确认信息, 0表示 ACK, 即接收 正确, 1表示 NAK, 即接收错误, 这样共产生 7个 HARQ数据包反 馈信息。 反馈区确定单元 503接收来自基站的反馈区参数信息, 根 据接收基站发来的多通道 HARQ反馈区的信息, 为这 7个 HARQ数 据包确定一个多通道 HARQ反馈区。 此处假设此时该用户信道条件 不好,基站设置多通道 HARQ反馈槽承载的反馈信息比特数 N为 3 , 则反馈区大小确定为 3个反馈槽。 接着反馈单元 504在上述多通道 HARQ反馈区发送 7个 HARQ通道 ACK或 NAK反馈信息。 反馈单 元 504根据反馈区参数, 将 7位反馈信息码字分成两部分, 前 3位 信息被调制在反馈区的第一个反馈槽上, 接着 3位信息被调制在第 二个反馈槽上, 最后 1位信息先在高位补 0成 3位信息再将其调制 在第三个反馈槽上。 然后, 在第 (K+H ) 帧, 终端设备将调制后的 反馈信息发送给基站, 即 HARQ数据包发送端, H为 HARQ数据包 的发送帧和确认帧之间的偏移量(offset ) 。 基站在第 K帧发送上述 2 个业务的 7 个多通道 HARQ 数据包之后, 不再继续发送多通道 HARQ数据包, 即停止发送多通道 HARQ数据包, 而是等待终端设 备的反馈信息。 在第 (K+H ) 帧, 基站接收到终端设备发送的反馈 信息, 根据解码信息, 在下一个多通道 HARQ发送帧, 重发这些分 属于 2个业务流的数据包。
' 以上实施例说明, 本发明不仅适用于单业务连接的多通道 HARQ 过程, 也适用于单用户终端多业务连接的多通道 HARQ过程。
需要特别说明的是, 上述实施方式中, OFDMA 无线通信系统的 网络端设备为基站, 多通道 HARQ过程的发送端为基站, 接收端为 终端设备, 本领域的技术人员应当理解, 上述设定仅为示例性说明。 图 7给出了采用本发明的实施方式的多通道 HARQ反馈的网络示意 图, 该网络包括基站 701, 终端设备 702, 中继站 703和 704。 本发 明的多通道 HARQ过程可以发生在基站 701和终端设备 702之间, 基站 701和中继站 703和 /或 704之间, 中继站 703和 /或 704和终端 设备 702之间 ,或者中继站 703和中继站 704之间。上述多通道 HARQ 过程中的设备可以既为发送端, 又为接收端。 作为多通道 HARQ的 接收端, 上述设备均包含一个接收反馈装置 500。根据以上描述的具 体实施方式的基本思想, 本领域的技术人员可以理解本发明的多通 道 HARQ过程在上述设备中的具体实现, 这里不再赘述。
本发明可以以硬件、 软件、 固件以及它们的组合来实现。 本领 域技术人员应该认识到, 也可以在供任何合适数据处理系统使用的 信号承载介质上所设置的计算机程序产品中体现本发明。 这种信号 承载介质可以是传输介质或用于机器可读信息的可记录介质, 包括 磁介质、 光介盾或其他合适介质。 可记录介质的示例包括: 硬盘驱 器中的磁盘或软盘、 用于光驱的光盘、 磁带, 以及本领域技术人 员所能想到的其他介质。 本领域技术人员应该认识到, 具有合适编 程装置的任何通信终端都将能够执行如程序产品中体现的本发明方 法的步骤。
从上述描述应该理解, 在不脱离本发明精神的情况下, 可以对 本发明各实施方式进行修改和变更。 本说明书中的描述仅仅是用于 说明性的, 而不应被认为是限制性的。 本发明的范围仅受权利要求 书的限制。

Claims

权 利 要 求 书
1. 一种用于多通道 HARQ接收反馈的方法, 包括:
接收 M个 HARQ数据包, 其中所述 M为大于 1的整数; 生成 M个 HARQ数据包反馈信息;
为 M个 HARQ数据包确定一个多通道 HARQ反馈区,所述多通 道 HARQ反馈区由 P个反馈槽組成, P为自然数; 以及
在所述多通道 HARQ反馈区发送 M个 HARQ数据包反馈信息。
2. 根据权利要求 1所述的方法, 其特征在于,
所述反馈槽由一个二维的时频资源组成 ,反馈槽大小为符号 N 1 X 载波 N2, 其中反馈槽参数 Nl、 N2均为自然数。
3. 根据权利要求 1或 2所述的方法, 其特征在于,
每个反馈槽承载 N比特信息, N的大小根据用户信道质量来确 定, 其中信道质量越好, N值越大, N为自然数。
4. 根据权利要求 3所述的方法, 其特征在于,
所述反馈槽的个数 P通过以下公式由当前需反馈的 HARQ通道
M_
的数目和反馈槽承载的比特信息位数 N决定, 厂 表示上取
5. 根据权利要求 1 - 4中任一项所述的方法, 其特征在于, 所述多通道 HARQ反馈区中的反馈槽按载波优先或符号优先的 规则进行排序。
6. 根据权利要求 1 - 5中任一项所述的方法, 其特征在于, 所 述 M个 HARQ数据包的 ACK或 NAK反馈信息被编码成一个 M位 的码字,其中第 k位表示第 k个通道的 HARQ数据包的 ACK或 NAK 反馈信息。
7. 根据权利要求 1 - 6中任一项所述的方法, 其特征在于, 这 M位的码字采用以下方式进行发送, 第一个 N位将被映射到多通道 HARQ反馈区的第一个反馈槽, 第二个 N位映射至第二个反馈槽, 此类推,直至最后的 L位(L≤N ) , 通过在高位补 0或者 1的方式, 最后的 L位映射至下一个反馈槽。
8. 根据权利要求 1 - 7中任一项所述的方法, 其特征在于, 所 述方法用于 OFDMA无线通信系统。
9. 根据权利要求 1 - 8中任一项所述的方法, 其特征在于, 所述反馈槽参数 N1和 N2, 反馈槽承载的比特数 N根据接收到 的反馈区参数消息得到。
10. 根据权利要求 1 - 9中任一项所述的方法, 其特征在于, 所 述多通道 HARQ同属一个业务连接。
11. 根据权利要求 1 - 10中任一项所述的方法, 其特征在于, 所述多通道 HARQ同属一个接收端。
12. 根据权利要求 1 - 11中任一项所述的方法, 其特征在于多 通道 HARQ的每个通道均采用停止与等待的方式进行数据包的发 送。
13. 一种用于多通道 HARQ接收反馈的装置, 包括:
接收单元, 用于接收 M个 HARQ数据包, 其中所述 M为大于 1 的整数;
生成单元, 用于生成 M个 HARQ数据包反馈信息;
确定单元,用于为 M个 HARQ数据包确定一个多通道 HARQ反 馈区, 其中所述多通道 HARQ反馈区由 P个反馈槽组成, P为自然 数; 以及
反馈单元,用于在所述多通道 HARQ反馈区发送 M个 HARQ数 据包反馈信息。
14. 根据权利要求 13所述的装置, 其特征在于,
所述反馈槽由一个二维的时频资源组成,反馈槽大小为符号 N 1 X 载波 N2, 其中反馈槽参数 Nl、 N2均为自然数。
15. 根据权利要求 13或 14所述的装置, 其特征在于,
每个反馈槽承载 N比特信息, N的大小根据用户信道质量来确 定, 其中信道质量越好, N值越大, N为自然数。
16. 根据权利要求 15所述的装置, 其特征在于, 所述反馈槽的个数 P通过以下公式由当前需反馈的 HARQ通道 的数目和反馈槽承载的比特信息位数 N决定, P . 门表示上取
Figure imgf000017_0001
17. 根据权利要求 13 - 16中任一项所述的装置, 其特征在于, 所述多通道 HARQ反馈区中的反馈槽按载波优先或符号优先的 规则进行排序。
18. 根据权利要求 13 - 17中任一项所述的装置, 其特征在于, 所述 M个 HARQ数据包的 ACK或 NAK反馈信息被编码成一个 M 位的码字, 其中第 k位表示第 k个通道的 HARQ数据包的 ACK或 NAK反馈信息。
19. 根据权利要求 13 - 18中任一项所述的装置, 其特征在于, 这 M位的码字采用以下方式进行发送, 第一个 N位将被映射到多通 道 HARQ反馈区的第一个反馈槽,第二个 N位映射至第二个反馈槽, ά此类推,直至最后的 L位(L≤N ), 通过在高位补 0或者 1的方式, 最后的 L位映射至下一个反馈槽。
20. 根据权利要求 13 - 19中任一项所述的装置, 其特征在于, 所述装置用于 OFDMA无线通信系统。
21. 根据权利要求 13 - 20中任一项所述的装置, 其特征在于, 所述反馈槽参数 N1和 N2, 反馈槽承载的比特数 N根据接收到 的反馈区参数消息得到。
22. 根据权利要求 13 - 21中任一项所述的装置, 其特征在于, 所述多通道 HARQ同属一个业务连接。
23. 根据权利要求 13 - 22中任一项所述的装置, 其特征在于, 所述多通道 HARQ同属一个接收端。
: 24. 根据权利要求 13 - 23中任一项所述的装置, 其特征在于多 通道 HARQ的每个通道均采用停止与等待的方式进行数据包的发 送。
25. 一种通信设备, 包括如权利要求 13 - 24中任一项所述的装
26. 根据权利要求 25所述的通信设备, 其特征在于, 所述通信 设备为终端设备、 基站或者中继站设备。
27. 一种通信系统, 包括如权利要求 25所述的通信设备。
28. 根据权利要求 27所述的通信系统, 其特征在于, 所述通信 系统为 OFDMA无线通信系统。
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