WO2012092801A1 - 一种上行闭环发送分集的信息反馈方法和装置 - Google Patents

一种上行闭环发送分集的信息反馈方法和装置 Download PDF

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Publication number
WO2012092801A1
WO2012092801A1 PCT/CN2011/083235 CN2011083235W WO2012092801A1 WO 2012092801 A1 WO2012092801 A1 WO 2012092801A1 CN 2011083235 W CN2011083235 W CN 2011083235W WO 2012092801 A1 WO2012092801 A1 WO 2012092801A1
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WIPO (PCT)
Prior art keywords
feedback
information
transmit diversity
uplink
loop transmit
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Ceased
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PCT/CN2011/083235
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English (en)
French (fr)
Inventor
刘俊强
杨光
张弛
刘淑慧
常永宇
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ZTE Corp
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ZTE Corp
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Priority claimed from CN201110000375.4A external-priority patent/CN102571299B/zh
Application filed by ZTE Corp filed Critical ZTE Corp
Priority to EP11855141.5A priority Critical patent/EP2654347A4/en
Publication of WO2012092801A1 publication Critical patent/WO2012092801A1/zh
Priority to US13/909,053 priority patent/US20130265994A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/54—Signalisation aspects of the TPC commands, e.g. frame structure
    • H04W52/58—Format of the TPC bits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/38—TPC being performed in particular situations
    • H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/54—Signalisation aspects of the TPC commands, e.g. frame structure

Definitions

  • the present invention relates to a weight feedback technique, and more particularly to an information feedback method and apparatus for uplink closed loop transmit diversity. Background technique
  • High Speed Uplink Packet Access is an enhanced technology introduced in 3GPP Release 6 to improve the transmission rate of the uplink and is an enhancement and extension of the performance of the Wideband Code Division Multiple Access (WCDMA) uplink system.
  • HSUPA improves uplink transmission performance by introducing fast uplink hybrid retransmission (HARQ), base station (NodeB)-based uplink scheduling, and simpler multi-code transmission with previous versions, so that the maximum peak transmission rate of the uplink can reach 5.76. Megabits per second (Mbps
  • Multi-antenna technology enables higher system capacity, wider cell coverage, and better quality of service by using multiple antennas at the transmitting and/or receiving end.
  • Multiple antennas at the transmitting end and/or the receiving end can be used to implement transmit or receive diversity as well as spatial multiplexing.
  • the transmit diversity technology is an anti-fading technology in the field of wireless communication in which at least two signals carrying the same information are transmitted at the transmitting end.
  • the signal carrying the same information is derived from at least one mutually independent signal source.
  • the transmit diversity technology can be divided into three basic types: space, frequency, and time, depending on the structure and statistical characteristics of the transmitted signal samples and the radio resources it occupies. It can also be a combination of these three types.
  • the spatial diversity refers to the use of different transmission location (space) positions, and the signal is irrelevant in statistical characteristics when it reaches the receiving end after the channel is experienced, and the anti-fading function is realized.
  • the frequency diversity refers to the function of using the statistically uncorrelated characteristics of the signals in different frequency bands after fading channels, that is, the difference in statistical characteristics of fading of different frequency bands, to achieve anti-fading (frequency selective). Frequency diversity can be divided into information to be sent when implemented. Do not modulate transmissions on carriers that are not frequency dependent.
  • the time diversity refers to using a random fading signal.
  • the fading between the samples is statistically uncorrelated, that is, using the statistical characteristics of temporal fading
  • the difference is to achieve resistance to time-selective fading.
  • the transmit diversity technology is classified into an open loop transmit diversity mode and a closed loop transmit diversity mode according to whether the receiver needs to feed back the diversity of the sender.
  • the open loop transmit diversity mode the receiver does not feed back any additional transmission-related information to the sender, and the sender can use its own coding technique (such as simple space-time coding) to complete the transmit diversity.
  • the closed-loop transmit diversity mode the receiving end needs to use feedback channel feedback to the transmitting end with a parameter related to transmit diversity (for example, a precoding vector indication required for transmit diversity), and the transmitting end uses the feedback information to complete the transmit diversity after receiving.
  • the main purpose of the present invention is to provide an information feedback method and apparatus for uplink closed-loop transmit diversity, which can implement information feedback of uplink closed-loop transmit diversity, and solve the problem of weight feedback of uplink closed-loop transmit diversity, which is convenient for the HSUPA system.
  • the user completes the operation of sending the diversity.
  • the present invention provides an information feedback method for uplink closed loop transmit diversity, the method comprising: the base station assigning each fragmented dedicated physical channel (F-DPCH) to at least one user; and the base station uses at least one F-DPCH as a feedback channel. Different in each of the F-DPCHs The information of the user is arranged in a time division manner; the information of at least one user in the F-DPCH includes feedback information of the uplink closed loop transmit diversity and a transmission power control (TPC) command.
  • F-DPCH fragmented dedicated physical channel
  • TPC transmission power control
  • the feedback information of the uplink closed loop transmit diversity includes: a feedback weight of the uplink closed loop transmit diversity.
  • the F-DPCH has a spreading factor of 128 or 256;
  • the number of bits of the feedback information of the uplink closed loop transmit diversity is 2 bits or 3 bits.
  • the method further includes: the base station transmitting the feedback information of the uplink closed loop transmit diversity of the same user and the uplink TPC command.
  • the feedback information of the uplink closed loop transmit diversity of the same user is sent adjacent to the uplink TPC command, so that the feedback information of the uplink closed loop transmit diversity is sent adjacent to the uplink TPC command;
  • the feedback information bits of the uplink closed-loop transmit diversity are transmitted adjacent to the TPC command bits.
  • the method further includes: the base station transmitting the F-DPCH according to the timing reference signal.
  • the present invention provides an information feedback device for uplink closed-loop transmit diversity, and the device includes: an allocation module and a feedback module;
  • An allocation module configured to allocate each F-DPCH to at least one user
  • a feedback module configured to use at least one F-DPCH as a feedback channel, where information of different users in each of the F-DPCHs is arranged in a time division manner; and information of at least one user in the F-DPCH includes uplink closed loop transmission Diversity feedback and upstream TPC commands.
  • the feedback module is further configured to use the uplink closed loop of the same user.
  • the feedback information of the transmit diversity is sent adjacent to the uplink TPC command.
  • the feedback module is specifically configured to send the feedback information of the uplink closed loop transmit diversity adjacent to the uplink TPC command;
  • the feedback information bits of the uplink closed-loop transmit diversity are transmitted adjacent to the TPC command bits.
  • the feedback module is further configured to transmit according to a timing reference signal.
  • the present invention provides an information feedback method and apparatus for uplink closed-loop transmit diversity, where a base station allocates each F-DPCH to at least one user; and uses at least one F-DPCH as a feedback channel, which is different in each of the F-DPCHs.
  • the information of the user is arranged in a time division manner; the information of the at least one user in the F-DPCH includes the feedback information of the uplink closed loop transmit diversity and the uplink TPC command; thus, the information feedback of the uplink closed loop transmit diversity can be implemented, where the information is When the weight is used, the problem of weight feedback of the uplink closed-loop transmit diversity is solved, and the user of the HSUPA system is allowed to complete the operation of transmitting diversity.
  • FIG. 1 is a schematic diagram of a frame structure and a time slot structure of an F-DPCH in the prior art
  • FIG. 2 is a schematic diagram of a time division manner in which the F-DPCH is shared by multiple users when the closed loop transmit diversity is not introduced in the prior art;
  • FIG. 3 is a schematic flow chart of an information feedback method for implementing uplink closed loop transmit diversity according to the present invention
  • FIG. 4 is a schematic diagram of the F-DPCH spreading factor of 256, and the weight is sent adjacent to the TPC;
  • FIG. 5 shows that the spreading factor of the F-DPCH of the present invention is 128, and the weight is sent adjacent to the TPC.
  • FIG. 6 is a schematic diagram of the F-DPCH spreading factor of 256, and the TPC is sent adjacent to the weight;
  • FIG. 7 is a schematic diagram of the F-DPCH spreading factor of 128 in the present invention, and the TPC is sent adjacent to the weight;
  • FIG. 9 is a schematic diagram of a F-DPCH spreading factor of 128, and a TPC is transmitted adjacent to a weight;
  • 10 is a timing diagram of time-division mode transmission when the weighting value is located before the TPC when the spreading factor of the weighting feedback codebook of the F-DPCH is 256;
  • 11 is a timing diagram of time-division mode transmission when the weighting value is located before the TPC when the spreading factor of the 4-weight value feedback codebook and the F-DPCH is 128;
  • FIG. 12 is a schematic diagram of a time division manner in which the F-DPCH is shared by multiple users when the weighting factor of the 4-value feedback codebook and the F-DPCH is 256;
  • FIG. 13 is a schematic diagram of a time division manner in which the F-DPCH is shared by multiple users when the spreading factor of the weighted feedback codebook and the F-DPCH is 128;
  • 14 is a timing diagram of time-division mode transmission when the weighting value is located before the TPC when the spreading factor of the weighting feedback codebook of the F-DPCH is 256;
  • 15 is a timing diagram of time-division mode transmission when the weighting value is located before the TPC when the spreading factor of the weighting feedback codebook of the F-DPCH is 128;
  • FIG. 16 is a schematic structural diagram of an information feedback apparatus for implementing uplink closed loop transmit diversity according to the present invention. detailed description
  • the present invention solves the problem of weight feedback of uplink closed loop transmit diversity, and needs to be determined in the system.
  • the channel carrying the feedback weight there are mainly two implementation modes, one is to develop a new channel for feedback weight transmission, and the other is to reuse the channel existing in the current 3GPP Release 10 protocol for feedback.
  • the transmission of weights Since the design of the new channel is expensive and involves significant changes to the 3GPP Release 10 protocol, the present invention is mainly based on the second embodiment, that is, a feedback channel using an existing channel as a feedback weight.
  • the present invention uses the F-DPCH as a feedback channel by evaluating all channels in the standard.
  • F-DPCH is a downlink physical channel that is standardized in 3GPP Release 6.
  • the F-DPCH is designed based on the fact that multiple users multiplex the same channelized code resource in a time division manner (TDM).
  • TDM time division manner
  • the F-DPCH is a channel shared by multiple users from the perspective of channelization codes, but from the time domain, each user using the same channel only occupies a specific transmission time, and does not appear on the time axis with each other. Overlap, so it is essentially a dedicated channel, which is why the F-DPCH is classified as a dedicated channel in existing protocols.
  • a time slot can carry 10 user TPC commands.
  • the time division mode of the F-DPCH is as shown in FIG. 2, and the relevant parameters of the slot structure of the F-DPCH and the number of bits in each area are allocated as shown in Table 1. .
  • the basic idea of the present invention is: the base station allocates each F-DPCH to at least one user; uses at least one F-DPCH as a feedback channel, and arranges information of different users in each of the F-DPCHs in a time division manner;
  • the information of at least one user in the F-DPCH includes feedback information of uplink closed loop transmit diversity and an uplink TPC command.
  • the present invention implements an information feedback method for uplink closed loop transmit diversity. As shown in FIG. 3, the method includes the following steps:
  • Step 101 The base station allocates each F-DPCH to at least one user.
  • Step 102 The base station uses at least one F-DPCH as a feedback channel, and the information of different users in each F-DPCH is arranged in a time division manner; the information of at least one user in the F-DPCH includes uplink closed loop transmission diversity. Feedback information and uplink TPC commands;
  • the feedback information of the uplink closed loop transmit diversity includes a feedback weight of the uplink closed loop transmit diversity, and the like;
  • the spreading factor of the F-DPCH is 128 or 256; the number of bits of the feedback information of the uplink closed-loop transmission diversity may be 2 bits or 3 bits;
  • the at least one user is: at least one user having the capability of receiving feedback information, the base station knowing the user's ability to receive feedback information according to the pilot signal of the user, and configuring information feedback to the user.
  • the step further includes: the base station transmitting, by the base station, the feedback information of the uplink closed loop transmit diversity of the same user and the uplink TPC command.
  • the feedback information of the uplink closed loop transmit diversity of the same user is sent adjacent to the uplink TPC command, and specifically, the feedback information of the uplink closed loop transmit diversity is sent adjacent to the uplink TPC command;
  • the feedback weight of the uplink closed-loop transmit diversity in slot #i is represented by a weight, with N weight bits
  • the TPC command is represented by TPC, and there are N TPC bits, which can be seen that the weight is sent adjacent to the TPC;
  • the spreading factor of the F-DPCH is 128, it can be seen that the weight is sent adjacent to the TPC.
  • the feedback information of the uplink closed loop transmit diversity of the same user is sent adjacent to the uplink TPC command, and specifically, the uplink TPC command is sent adjacent to the feedback information of the uplink closed loop transmit diversity;
  • the feedback weight of the uplink closed-loop transmit diversity in the slot #i is represented by a weight, and has a N-weight bit
  • the TPC command is represented by TPC.
  • N TPC bits it can be seen that the TPC is sent adjacent to the weights.
  • the spreading factor of the F-DPCH is 128, it can be seen that the TPC precedes the weight. Send adjacent.
  • the feedback information bit of the uplink closed-loop transmit diversity of the same user is sent adjacent to the uplink TPC command bit, and specifically, the feedback information bit of the uplink closed-loop transmit diversity is transmitted adjacent to the TPC command bit.
  • the feedback weight of the uplink closed-loop transmit diversity in the slot #i is represented by a weight, and has a N-weight bit, and the TPC command is represented by TPC.
  • TPC TPC bit
  • the TPC of each bit is transmitted adjacent to the weight crossing; in addition, as shown in FIG. 9, when the spreading factor of the F-DPCH is 128, the same TPC and weight of each bit Values are crossed adjacently.
  • the step further includes: the base station transmitting the F-DPCH according to the timing reference signal, and feeding back the feedback information of the uplink closed loop transmit diversity and the uplink TPC command to at least one user.
  • the number of bits of the feedback information of the uplink closed-loop transmit diversity is 2 bits, and when the spreading factor is 256, the relevant parameters of the slot structure of the F-DPCH and the number of bits of each area are allocated as shown in Table 2;
  • the number of bits of the feedback information of the uplink closed-loop transmit diversity is 2 bits, and when the spreading factor is 128, the relevant parameters of the slot structure of the F-DPCH and the number of bits of each area are allocated as shown in Table 3;
  • the number of bits of the feedback information of the transmit diversity is 3 bits, and when the spreading factor is 256, the relevant parameters of the slot structure of the F-DPCH and the number of bits of each area are allocated as shown in Table 4;
  • the number of bits of the feedback information is 3 bits, and when the spreading factor is 128, the relevant parameters of
  • the feedback weight of the uplink closed-loop transmit diversity is represented by a weight
  • the TPC command is represented by a TPC.
  • the timing diagrams of the time-division mode transmission in which the weight is located before the TPC are shown in FIG. 10 and FIG. 11, and reference may be made to FIG. 4 to FIG.
  • a timing diagram of the time-division mode transmission before the TPC is located can be obtained, and a timing diagram of the time-division mode transmission of the weight and the TPC cross-arrangement can also be obtained. As shown in FIG.
  • Figure 12 shows the selection of the 4-weight feedback codebook, and the spreading factor is 256.
  • the F-DPCH is indicated by the time division mode shared by multiple users, and the information fed back to different users is different.
  • the information fed back to the user 1, the user 4, and the user 5 includes feedback weights and TPC commands of the uplink closed-loop transmit diversity, corresponding to the slot structures #4, #1, and #2 in Table 2, respectively;
  • the information fed back to User 2, User 3, User 6 and User 7 contains only the TPC commands, which correspond to the slot structures #2, #3, #8, and #9 in Table 1, respectively.
  • the downlink spreading code resource and the base station transmission power resource can be further saved by the embodiment. This implementation can also be used for a spreading factor of 128. As shown in FIG.
  • the information fed back to the user 1, the user 2, the user 5, the user 8, the user 9, the user 10, and the user 13 includes
  • the feedback weights and TPC commands of the uplink closed-loop transmit diversity correspond to the slot structures #9, #0, #2, #4, #5, #6, and #8 in Table 3, respectively, and are fed back to the user 3, the user.
  • the information of the user 6, the user 7, the user 11, and the user 12 only includes the TPC commands, which correspond to the slot structures #la, #lb, #3a, #3b, #7a, and #7b in Table 3, respectively.
  • the relevant parameters of the slot structure of the F-DPCH and the number of bits in each region are The allocation is as shown in Table 4; when the number of bits of the feedback weight of the uplink closed-loop transmit diversity is 3 bits, that is, the 8-weight feedback codebook is selected, and the spreading factor is 128, the slot structure of the F-DPCH is related.
  • the parameters and the number of bits in each area are allocated as shown in Table 5.
  • the feedback weight of the uplink closed-loop transmit diversity is represented by a weight
  • the TPC command is represented by a TPC.
  • a time-division mode transmission of the TPC before the weight can be obtained.
  • the feedback weight codebook is 8 weights
  • the number of weight bits per user is 3 bits, and together with the 2 bits of the TPC command, it will occupy 5 bits.
  • the spreading factor is 256, as shown in FIG.
  • the present invention further provides an information feedback device for uplink closed-loop transmit diversity.
  • the device includes: an allocation module 21 and a feedback module 22; wherein, the allocation module 21 is configured to -DPCH is assigned to at least one user;
  • a feedback module 22 configured to use at least one F-DPCH as a feedback channel, in each of the foregoing
  • the information of the different users in the F-DPCH is arranged in a time division manner; the information of the at least one user in the F-DPCH includes the feedback information of the uplink closed loop transmit diversity and the uplink TPC command;
  • the feedback information of the uplink closed loop transmit diversity is generally a feedback weight of the uplink closed loop transmit diversity
  • the feedback module 22 is further configured to send, by using the feedback information of the uplink closed loop transmit diversity of the same user and the uplink TPC command.
  • the feedback module 22 sends the feedback information of the uplink closed loop transmit diversity of the same user to the uplink TPC command. Specifically, the feedback module 22 forwards the feedback information of the uplink closed loop transmit diversity to the uplink TPC.
  • the instructions are sent adjacently;
  • the feedback module 22 sends the feedback information of the uplink closed loop transmit diversity of the same user to the uplink TPC command, where the feedback module 22 sends the uplink TPC command prior to the uplink closed loop transmit diversity.
  • Information is sent adjacently;
  • the feedback module 22 sends the feedback information of the uplink closed loop transmit diversity of the same user to the uplink TPC command. Specifically, the feedback module 22 crosses the feedback information bits of the uplink closed loop transmit diversity with the TPC command bit. Adjacent transmission
  • the feedback module 22 is further configured to: transmit the F-DPCH according to the timing reference signal, and feed back the feedback information of the uplink closed-loop transmit diversity and the uplink TPC command to at least one user.
  • information feedback of the uplink closed-loop transmit diversity can be implemented, and the existing downlink physical channel bearer feedback information is effectively reused without causing additional resource overhead.
  • the method places the newly introduced feedback information adjacent to the original information in the channel, and can fully utilize the bits in the channel, and can simplify the system design, and can also carry the maximum number of users in one time slot.
  • the method also considers compatibility with the original protocol. By reducing the channel spreading factor, the number of users that the multiplexed channel can carry in one time slot is not changed as much as possible.

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  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

本发明公开了一种上行闭环发送分集的信息反馈方法，基站将每一条碎形专用物理信道（F-DPCH）分配给至少一个用户；采用至少一条F-DPCH作为反馈信道，在每条所述F-DPCH中不同用户的信息之间以时分方式排列；所述F-DPCH中至少一个用户的信息包括上行闭环发送分集的反馈信息和上行TPC指令；本发明同时还公开了一种上行闭环发送分集的信息反馈装置，通过本发明的方案，能够实现上行闭环发送分集的信息反馈，在所述信息为权值时，解决了上行闭环发送分集的权值反馈的问题，便于HSUPA系统的用户端完成发送分集的操作。

Description

一种上行闭环发送分集的信息反馈方法和装置 技术领域
本发明涉及权值反馈技术， 尤其涉及一种上行闭环发送分集的信息反 馈方法和装置。 背景技术
高速上行链路分组接入（HSUPA )是 3GPP Release 6 引入的增强型技 术， 旨在提高上行链路的传输速率， 是对宽带码分多址（ WCDMA )上行 系统性能的增强和扩展。 HSUPA通过引入快速上行混合重传（HARQ )、 基 于基站（NodeB )的上行调度以及与之前版本更加简单的多码传输， 提高上 行链路传输性能， 使上行链路的最大峰值传输速率可以达到 5.76兆比特每 秒 ( Mbps
多天线技术是通过在发送端和 /或接收端使用多根天线来实现更高的系 统容量、 更广的小区覆盖以及更好的业务质量。 发送端和 /或接收端的多根 天线， 既可以用来实现发送或接收分集也可以用来实现空间复用。 其中， 发送分集技术是一种在发送端发送至少 2个承载相同信息的信号的无线通 信领域的抗衰落技术。 其中， 承载相同信息的信号来源于至少 1个相互独 立的信号源。 发送分集技术依据其发射信号样值的结构与统计特性以及其 所占无线资源的不同， 可以划分为空间、 频率、 时间 3 大基本类型， 也可 以是这 3种类型的相互结合。 所述空间分集是指利用不同发射地点（空间） 位置的不同， 信号在经历信道后到达接收端时在统计特性上的不相关性， 实现抗衰落的功能。 所述频率分集是指利用位于不同频段的信号经衰落信 道后在统计上的不相关特性， 即不同频段衰落统计特性上的差异， 来实现 抗衰落（频率选择性） 的功能。 频率分集在实现时可以将待发送的信息分 别调制在频率不相关的载波上进行发射。 所述时间分集是指利用一个随机 衰落信号， 当取样点的时间间隔足够大时（大于传输信道相干时间）， 样点 间的衰落在统计上是互不相关的， 即利用时间上衰落统计特性上的差异， 来实现抗时间选择性衰落。
发送分集技术依据接收端是否需要向发送端反馈分集需要的参数分为 开环发送分集模式和闭环发送分集模式。 开环发送分集模式下， 接收端不 向发送端反馈任何额外的与发射相关的信息， 发送端可以自行使用相应的 编码技术（例如简单的空-时编码） 完成发送分集。 闭环发送分集模式下， 接收端需要使用反馈信道反馈给发射端一个与发送分集相关的参数（例如 发送分集所需的预编码向量指示）， 发送端在接收后使用该反馈信息完成发 送分集。
在 3GPP Release 10中， HSUPA系统的用户的上行开环发送分集已经完 成在了标准的制定（TR25.863 ), 但闭环发送分集的相关内容目前还没有确 定。 由于闭环发送分集的引入， 在进行发射预编码的情况下， 基站势必需 要向用户反馈发送分集所需的权值信息， 因此， 有必要对上行闭环发送分 集的权值反馈的问题进行解决。 发明内容
有鉴于此， 本发明的主要目的在于提供一种上行闭环发送分集的信息 反馈方法和装置， 能够实现上行闭环发送分集的信息反馈， 解决了上行闭 环发送分集的权值反馈的问题，便于 HSUPA系统的用户完成发送分集的操 作。
为达到上述目的， 本发明的技术方案是这样实现的：
本发明提供的一种上行闭环发送分集的信息反馈方法， 该方法包括： 基站将每条碎形专用物理信道（F-DPCH )分配给至少一个用户； 基站将至少一条 F-DPCH作为反馈信道， 在每条所述 F-DPCH中不同 用户的信息之间以时分方式排列； 所述 F-DPCH 中至少一个用户的信息包 括上行闭环发送分集的反馈信息和上行传输功率控制 （TPC, Transmission Power Control )指令。
上述方案中， 所述上行闭环发送分集的反馈信息包括： 上行闭环发送 分集的反馈权值。
上述方案中， 所述 F-DPCH的扩频因子为 128或 256;
所述上行闭环发送分集的反馈信息的比特数为 2比特或 3比特。
上述方案中， 该方法进一步包括： 所述基站将同一用户的所述上行闭 环发送分集的反馈信息和上行 TPC指令相邻发送。
上述方案中， 所述将同一用户的所述上行闭环发送分集的反馈信息和 上行 TPC指令相邻发送， 为， 将所述上行闭环发送分集的反馈信息先于所 述上行 TPC指令相邻发送；
或， 将所述上行 TPC指令先于所述上行闭环发送分集的反馈信息相邻 发送；
或， 将所述上行闭环发送分集的反馈信息比特与 TPC指令比特交叉相 邻发送。
上述方案中， 该方法进一步包括： 所述基站根据定时参考信号发射 F-DPCH。
本发明提供的一种上行闭环发送分集的信息反馈装置， 该装置包括： 分配模块、 反馈模块； 其中，
分配模块， 用于将每条 F-DPCH分配给至少一个用户；
反馈模块， 用于采用至少一条 F-DPCH作为反馈信道， 在每条所述 F-DPCH中不同用户的信息之间以时分方式排列；所述 F-DPCH中至少一个 用户的信息包括上行闭环发送分集的反馈信息和上行 TPC指令。
上述方案中， 所述反馈模块， 进一步用于将同一用户的所述上行闭环 发送分集的反馈信息和上行 TPC指令相邻发送。
上述方案中， 所述反馈模块， 具体用于将所述上行闭环发送分集的反 馈信息先于所述上行 TPC指令相邻发送；
或， 将所述上行 TPC指令先于所述上行闭环发送分集的反馈信息相邻 发送；
或， 将所述上行闭环发送分集的反馈信息比特与 TPC指令比特交叉相 邻发送。
上述方案中， 所述反馈模块， 进一步还用于根据定时参考信号发射
F-DPCH。
本发明提供的一种上行闭环发送分集的信息反馈方法和装置， 基站将 每一条 F-DPCH分配给至少一个用户； 采用至少一条 F-DPCH作为反馈信 道， 在每条所述 F-DPCH 中不同用户的信息之间以时分方式排列； 所述 F-DPCH 中至少一个用户的信息包括上行闭环发送分集的反馈信息和上行 TPC指令； 如此， 能够实现上行闭环发送分集的信息反馈， 在所述信息为 权值时， 解决了上行闭环发送分集的权值反馈的问题，便于 HSUPA系统的 用户端完成发送分集的操作。 附图说明
图 1为现有技术中 F-DPCH的帧结构和时隙结构示意图；
图 2为现有技术未引入闭环发送分集时 F-DPCH由多个用户共用的时 分方式示意图；
图 3 为本发明实现一种上行闭环发送分集的信息反馈方法的流程示意 图；
图 4为本发明 F-DPCH的扩频因子为 256, 权值先于 TPC相邻发送的 示意图；
图 5为本发明 F-DPCH的扩频因子为 128, 权值先于 TPC相邻发送的 示意图；
图 6为本发明 F-DPCH的扩频因子为 256, TPC先于权值相邻发送的示 意图；
图 7为本发明 F-DPCH的扩频因子为 128, TPC先于权值相邻发送的示 意图；
图 8为本发明 F-DPCH的扩频因子为 256, TPC与权值交叉相邻发送的 示意图；
图 9为本发明 F-DPCH的扩频因子为 128, TPC与权值交叉相邻发送的 示意图；
图 10为本发明选用 4权值反馈码本、 F-DPCH的扩频因子为 256时， 权值位于 TPC之前的时分方式发送的时序示意图；
图 11为本发明选用 4权值反馈码本、 F-DPCH的扩频因子为 128时， 权值位于 TPC之前的时分方式发送的时序示意图；
图 12为本发明选用 4权值反馈码本、 F-DPCH的扩频因子为 256时， F-DPCH由多个用户共用的时分方式示意图；
图 13为本发明选用 4权值反馈码本、 F-DPCH的扩频因子为 128时， F-DPCH由多个用户共用的时分方式示意图；
图 14为本发明选用 8权值反馈码本、 F-DPCH的扩频因子为 256时， 权值位于 TPC之前的时分方式发送的时序示意图；
图 15为本发明选用 8权值反馈码本、 F-DPCH的扩频因子为 128时， 权值位于 TPC之前的时分方式发送的时序示意图；
图 16为本发明实现一种上行闭环发送分集的信息反馈装置的结构示意 图。 具体实施方式
本发明为解决上行闭环发送分集的权值反馈的问题， 需要确定系统中 用于承载反馈权值信息的合适反馈信道， 并根据反馈的比特数目设计该信 道的信道时隙格式和传输方式。 在选择承载反馈权值的信道方面， 主要有 两种实施方式， 一种是开发一个用于反馈权值传输的新信道， 另一种是复 用目前 3GPP Release 10协议中已经存在的信道进行反馈权值的传输。 由于 设计新信道开销较大并且涉及到对 3GPP Release 10协议的大幅度改动， 因 此本发明主要基于第二种实施方式， 即使用现有信道作为反馈权值的反馈 信道。 通过对标准中所有信道的评估， 本发明采用 F-DPCH作为反馈信道。
F-DPCH是在 3GPP Release 6 中完成标准化的一种下行物理信道。 F-DPCH 的设计依据是， 多个用户以时分方式（TDM )复用同一个信道化 码资源。 F-DPCH从信道化码的角度上看是多个用户共用的信道，但是从时 域上观察， 使用同一个信道的每个用户仅仅占用了特定的发射时刻， 互相 并没有在时间轴上出现重叠， 因此其本质上是一种专用信道， 这也是在现 有协议中将 F-DPCH归为专用信道的原因。在现有技术中， F-DPCH使用单 一固定的扩频因子（SF=256 ), 其帧结构和时隙结构如图 1所示， 仅仅用以 发送用于功控的 2比特 TPC指令， 并且一个时隙内可以承载 10个用户的 TPC指令， 此时， F-DPCH的时分方式如图 2所示， F-DPCH的时隙结构的 相关参数和各区域比特数目的分配如表 1所示。
Figure imgf000008_0001
表 1 本发明的基本思想是： 基站将每一条 F-DPCH分配给至少一个用户； 采用至少一条 F-DPCH作为反馈信道， 在每条所述 F-DPCH中不同用户的 信息之间以时分方式排列； 所述 F-DPCH 中至少一个用户的信息包括上行 闭环发送分集的反馈信息和上行 TPC指令。
下面通过附图及具体实施例对本发明做进一步的详细说明。
本发明实现一种上行闭环发送分集的信息反馈方法， 如图 3 所示， 该 方法包括以下几个步驟：
步驟 101： 基站将每一条 F-DPCH分配给至少一个用户；
步驟 102: 基站采用至少一条 F-DPCH作为反馈信道， 在每条所述 F-DPCH中不同用户的信息之间以时分方式排列；所述 F-DPCH中至少一个 用户的信息包括上行闭环发送分集的反馈信息和上行 TPC指令；
这里， 所述上行闭环发送分集的反馈信息， 包括上行闭环发送分集的 反馈权值等；
所述 F-DPCH的扩频因子为 128或 256;所述上行闭环发送分集的反馈 信息的比特数， 可以是 2比特或 3比特；
所述至少一个用户为： 至少一个具有接收反馈信息的能力的用户， 基 站根据用户的导频信号获知用户具有接收反馈信息的能力， 并配置对该用 户的信息反馈。
进一步的， 本步驟还包括： 基站将同一用户的所述上行闭环发送分集 的反馈信息和上行 TPC指令相邻发送。
进一步的， 所述将同一用户的所述上行闭环发送分集的反馈信息和上 行 TPC指令相邻发送， 具体为， 将所述上行闭环发送分集的反馈信息先于 所述上行 TPC指令相邻发送；
下面将所述上行闭环发送分集的反馈信息以上行闭环发送分集的反馈 权值为例进行说明。 如图 4所示， 所述 F-DPCH的扩频因子为 256时， 所 述时隙 #i中上行闭环发送分集的反馈权值由权值表示， 有 N 权值比特， TPC 指令由 TPC表示， 有 NTPC比特， 可以看出权值先于 TPC相邻发送； 另夕卜， 如图 5所示， 所述 F-DPCH的扩频因子为 128时， 同样可以看出权值先于 TPC相邻发送。
进一步的， 所述将同一用户的所述上行闭环发送分集的反馈信息和上 行 TPC指令相邻发送， 具体为， 将所述上行 TPC指令先于所述上行闭环发 送分集的反馈信息相邻发送；
下面将所述上行闭环发送分集的反馈信息以上行闭环发送分集的反馈 权值为例进行说明。 如图 6所示， 所述 F-DPCH的扩频因子为 256时， 所 述时隙 #i中上行闭环发送分集的反馈权值由权值表示， 有 N 权值比特， TPC 指令由 TPC表示， 有 NTPC比特， 可以看出 TPC先于权值相邻发送； 另夕卜， 如图 7所示， 所述 F-DPCH的扩频因子为 128时， 同样可以看出 TPC先于 权值相邻发送。
进一步的， 所述将同一用户的所述上行闭环发送分集的反馈信息比特 和上行 TPC指令比特相邻发送， 具体为， 将所述上行闭环发送分集的反馈 信息比特与 TPC指令比特交叉相邻发送；
下面将所述上行闭环发送分集的反馈信息以上行闭环发送分集的反馈 权值为例进行说明。 如图 8所示， 所述 F-DPCH的扩频因子为 256时， 所 述时隙 #i中上行闭环发送分集的反馈权值由权值表示， 有 N 权值比特， TPC 指令由 TPC表示， 有 NTPC比特， 每一比特的 TPC与权值交叉相邻发送； 另夕卜， 如图 9所示， 所述 F-DPCH的扩频因子为 128时， 同样每一比特的 TPC与权值交叉相邻发送。
进一步的， 本步驟还包括： 所述基站根据定时参考信号发射 F-DPCH, 将所述上行闭环发送分集的反馈信息和上行 TPC 指令反馈给至少一名用 户。 所述上行闭环发送分集的反馈信息的比特数为 2比特，扩频因子为 256 时， 所述 F-DPCH的时隙结构的相关参数和各区域比特数目的分配如表 2 所示； 所述上行闭环发送分集的反馈信息的比特数为 2 比特， 扩频因子为 128时，所述 F-DPCH的时隙结构的相关参数和各区域比特数目的分配如表 3所示； 所述上行闭环发送分集的反馈信息的比特数为 3比特， 扩频因子为 256时，所述 F-DPCH的时隙结构的相关参数和各区域比特数目的分配如表 4所示； 所述上行闭环发送分集的反馈信息的比特数为 3比特， 扩频因子为 128时，所述 F-DPCH的时隙结构的相关参数和各区域比特数目的分配如表
5所示。
Figure imgf000011_0001
表 2
Figure imgf000012_0001
表 4
Figure imgf000013_0001
表 5
将上行闭环发送分集的反馈权值由权值表示， TPC指令由 TPC表示， 图 10和图 11中给出权值位于 TPC之前的时分方式发送的时序示意， 可以 参考参考图 4到图 9, 通过交换权值和 TPC的位置， 可以得到 TPC位于权 值之前的时分方式发送的时序示意， 也可以得到权值和 TPC交叉排列的时 分方式发送的时序示意。 如图 10所示， 当上行闭环发送分集的反馈权值的 比特数为 2比特时， 即选用 4权值反馈码本时，每个用户的权值比特数为 2 比特， 与 TPC指令的 2比特一共将占据 4比特， 在扩频因子为 256的条件 下， 一个时隙中的 20比特将可以被 5个需要反馈权值的用户所共享而不会 产生用户间信息在时间轴上的交叠。 而在扩频因子为 128 的条件下， 如图 11所示， 一个时隙的 40比特仍然可以被最多需要反馈权值的 10个用户所 共享而不会产生用户间信息在时间轴上的交叠。
图 12给出了选用 4权值反馈码本， 且扩频因子为 256时， F-DPCH由 多个用户共用的时分方式示意， 反馈给不同用户的信息不一样。 在该实施 例中，反馈给用户 1、 用户 4和用户 5的信息包含了上行闭环发送分集的反 馈权值和 TPC指令， 分别对应表 2中的时隙结构 #4、 #1和 #2; 而反馈给用 户 2、 用户 3、 用户 6和用户 7的信息仅包含了 TPC指令， 分别对应表 1 中的时隙结构 #2、 #3、 #8和 #9。 通过实施例可以进一步节省下行的扩频码 资源和基站发射功率资源。 这种实施方式也可以用于扩频因子为 128 的情 况， 如图 13所示， 当选用 4权值反馈码本， 且扩频因子为 128时， 反馈给 用户 1、 用户 2、 用户 5、 用户 8、 用户 9、 用户 10和用户 13的信息包含了 上行闭环发送分集的反馈权值和 TPC指令，分别对应表 3中的时隙结构 #9、 #0、 #2、 #4、 #5、 #6和 #8; 而反馈给用户 3、 用户 4、 用户 6、 用户 7、 用 户 11、 用户 12的信息仅包含 TPC指令， 分别对应表 3中的时隙结构 #la、 #lb、 #3a、 #3b、 #7a和 #7b。
当上行闭环发送分集的反馈权值的比特数为 3比特， 即选用 8权值反 馈码本， 扩频因子为 256时， 所述 F-DPCH的时隙结构的相关参数和各区 域比特数目的分配如表 4所示； 当上行闭环发送分集的反馈权值的比特数 为 3比特， 即选用 8权值反馈码本， 扩频因子为 128时， 所述 F-DPCH的 时隙结构的相关参数和各区域比特数目的分配如表 5所示。
将上行闭环发送分集的反馈权值由权值表示， TPC指令由 TPC表示， 参考参考图 4到图 9, 通过交换权值和 TPC的位置， 可以得到 TPC位于权 值之前的时分方式发送的示意， 也可以得到权值和 TPC交叉排列的时分方 式发送的示意。 当反馈权值码本为 8权值时， 每个用户的权值比特数为 3 比特， 与 TPC指令的 2比特一共将占据 5比特， 在扩频因子为 256的条件 下， 如图 14所示， 一个时隙中的 20比特将可以被 4个需要反馈权值的用 户所共享而不会产生用户间信息在时间轴上的交叠。 而在扩频因子为 128 的条件下， 如图 15所示， 一个时隙的 40比特可以被 8个需要反馈权值的 用户所共享而不会产生用户间信息在时间轴上的交叠。
为了实现上述方法， 本发明还提供一种上行闭环发送分集的信息反馈 装置， 如图 16所示， 该装置包括： 分配模块 21、 反馈模块 22; 其中， 分配模块 21 , 用于将每一条 F-DPCH分配给至少一个用户；
反馈模块 22, 用于采用至少一条 F-DPCH作为反馈信道， 在每条所述 F-DPCH中不同用户的信息之间以时分方式排列；所述 F-DPCH中至少一个 用户的信息包括上行闭环发送分集的反馈信息和上行 TPC指令；
这里， 所述上行闭环发送分集的反馈信息， 一般为上行闭环发送分集 的反馈权值；
所述反馈模块 22, 进一步用于将同一用户的所述上行闭环发送分集的 反馈信息和上行 TPC指令相邻发送；
所述反馈模块 22将同一用户的所述上行闭环发送分集的反馈信息和上 行 TPC指令相邻发送，具体为， 所述反馈模块 22将所述上行闭环发送分集 的反馈信息先于所述上行 TPC指令相邻发送；
所述反馈模块 22将同一用户的所述上行闭环发送分集的反馈信息和上 行 TPC指令相邻发送， 具体为 , 所述反馈模块 22将所述上行 TPC指令先 于所述上行闭环发送分集的反馈信息相邻发送；
所述反馈模块 22将同一用户的所述上行闭环发送分集的反馈信息和上 行 TPC指令相邻发送，具体为，所述反馈模块 22将所述上行闭环发送分集 的反馈信息比特与 TPC指令比特交叉相邻发送；
所述反馈模块 22, 进一步还用于根据定时参考信号发射 F-DPCH, 将 所述上行闭环发送分集的反馈信息和上行 TPC指令反馈给至少一名用户。 工业实用性
通过本发明的方案， 能够实现上行闭环发送分集的信息反馈， 并且有 效重用已有的下行物理信道承载反馈信息， 没有造成额外的资源开销。 本 方法将新引入的反馈信息与信道中原有的信息相邻放置， 可以充分利用信 道内的比特位， 在简化系统设计的同时， 也可以在一个时隙中承载最多的 用户数目。 本方法还考虑到与原有协议的兼容性， 通过降低信道扩频因子， 尽可能保持复用信道在一个时隙内所能承载的用户数目不发生剧烈变化。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围， 凡在本发明的精神和原则之内所作的任何修改、 等同替换和改进 等， 均应包含在本发明的保护范围之内。

Claims

权利要求书
1、一种上行闭环发送分集的信息反馈方法，其特征在于，该方法包括： 基站将每条碎形专用物理信道（F-DPCH )分配给至少一个用户； 基站将至少一条 F-DPCH作为反馈信道， 在每条所述 F-DPCH中不同 用户的信息之间以时分方式排列； 所述 F-DPCH 中至少一个用户的信息包 括上行闭环发送分集的反馈信息和上行传输功率控制 （TPC )指令。
2、 根据权利要求 1所述的信息反馈方法， 其特征在于， 所述上行闭环 发送分集的反馈信息包括： 上行闭环发送分集的反馈权值。
3、根据权利要求 1或 2所述的信息反馈方法，其特征在于，所述 F-DPCH 的扩频因子为 128或 256;
所述上行闭环发送分集的反馈信息的比特数为 2比特或 3比特。
4、 根据权利要求 1所述的信息反馈方法， 其特征在于， 该方法进一步 包括： 所述基站将同一用户的所述上行闭环发送分集的反馈信息和上行 TPC指令相邻发送。
5、 根据权利要求 4所述的信息反馈方法， 其特征在于， 所述将同一用 户的所述上行闭环发送分集的反馈信息和上行 TPC指令相邻发送， 为： 将 所述上行闭环发送分集的反馈信息先于所述上行 TPC指令相邻发送；
或， 将所述上行 TPC指令先于所述上行闭环发送分集的反馈信息相邻 发送；
或， 将所述上行闭环发送分集的反馈信息比特与 TPC指令比特交叉相 邻发送。
6、 根据权利要求 1所述的信息反馈方法， 其特征在于， 该方法进一步 包括： 所述基站根据定时参考信号发射 F-DPCH。
7、一种上行闭环发送分集的信息反馈装置，其特征在于，该装置包括： 分配模块、 反馈模块； 其中， 分配模块， 用于将每条 F-DPCH分配给至少一个用户；
反馈模块， 用于采用至少一条 F-DPCH作为反馈信道， 在每条所述 F-DPCH中不同用户的信息之间以时分方式排列；所述 F-DPCH中至少一个 用户的信息包括上行闭环发送分集的反馈信息和上行 TPC指令。
8、根据权利要求 7所述的信息反馈装置，其特征在于， 所述反馈模块， 进一步用于将同一用户的所述上行闭环发送分集的反馈信息和上行 TPC指 令相邻发送。
9、根据权利要求 8所述的信息反馈装置， 其特征在于， 所述反馈模块， 具体用于将所述上行闭环发送分集的反馈信息先于所述上行 TPC指令相邻 发送；
或， 将所述上行 TPC指令先于所述上行闭环发送分集的反馈信息相邻 发送；
或， 将所述上行闭环发送分集的反馈信息比特与 TPC指令比特交叉相 邻发送。
10、 根据权利要求 7所述的信息反馈装置， 其特征在于， 所述反馈模 块， 进一步还用于根据定时参考信号发射 F-DPCH。
PCT/CN2011/083235 2011-01-04 2011-11-30 一种上行闭环发送分集的信息反馈方法和装置 Ceased WO2012092801A1 (zh)

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