WO2012062085A1 - 上行传输数据块应答信息资源分配方法及装置 - Google Patents

上行传输数据块应答信息资源分配方法及装置 Download PDF

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Publication number
WO2012062085A1
WO2012062085A1 PCT/CN2011/073092 CN2011073092W WO2012062085A1 WO 2012062085 A1 WO2012062085 A1 WO 2012062085A1 CN 2011073092 W CN2011073092 W CN 2011073092W WO 2012062085 A1 WO2012062085 A1 WO 2012062085A1
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Prior art keywords
phich
response information
information
uplink
group
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PCT/CN2011/073092
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English (en)
French (fr)
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费佩燕
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中兴通讯股份有限公司
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Publication of WO2012062085A1 publication Critical patent/WO2012062085A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0027Scheduling of signalling, e.g. occurrence thereof
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028Formatting
    • H04L1/0029Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling
    • 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
    • H04L1/1607Details of the supervisory signal
    • 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
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055Physical resource allocation for ACK/NACK

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to an uplink transmission block response information resource allocation method and apparatus.
  • the code transmitted by the originator not only can detect errors, but also has certain error correction capability.
  • the receiver decoder After receiving the transport block, the receiver decoder first checks the error condition. If the error correction capability of the code is within, the error correction is automatically performed. If the error is too much, the error correction capability of the code is exceeded, and the error can be detected and received.
  • the terminal sends a decision signal to the originating end through the feedback channel, requesting the originating end to resend the information.
  • Orthogonal Frequency Division Multiplexing OFDM
  • the correct response/error response (ACK/NACK) control signaling is used to indicate the correct or incorrect transmission, and to determine whether retransmission is needed. .
  • the 3rd Generation Partnership Project (referred to as the 3rd Generation Partnership Project)
  • the downlink physical channel includes a physical control format indication channel, a physical downlink control channel, and a physical hybrid automatic request retransmission indicator channel (Physical Hybrid ARQ Indicator Channel). , referred to as PHICH) channel.
  • the PHICH is used to transmit downlink ACK/NACK information as HARQ response information of the Physical Uplink Shared Channel (PUSCH).
  • PUSCH Physical Uplink Shared Channel
  • the terminal supports at most one transport block. Therefore, the corresponding PHICH channel requires only a 1-bit HARQ indicator (HI).
  • HI 1-bit HARQ indicator
  • the base station correctly receives the PUSCH
  • the base station The PUSCH was not received correctly.
  • the 1-bit HARQ indicator is encoded, modulated, spread, and then mapped onto the corresponding PHICH channel.
  • the International Mobile Telecommunications-Advanced (IMT-Advanced) system will achieve higher data rates and greater system capacity, ie, peak speed at low speeds and hotspot coverage. It can reach lGbit/s (bits/second), and the peak rate can reach 100Mbit/s in high-speed mobile and wide-area coverage.
  • LTE-A Advanced Long Term Evolution
  • LTE-A carrier aggregation
  • CA Carrier Aggregation
  • the LTE-A system satisfies the requirements of the uplink transmission rate of the IMT-Advanced, and the UE uplink transmission can support multiple transport blocks.
  • the UE can support two transmission blocks at the same time. Therefore, in the corresponding downlink PHICH channel, at least two response information of the UE needs to be fed back.
  • the current solution is to obtain a feedback signal by logically ANDing the two response information, and then use the existing method of LTE to send the feedback signal to the corresponding PHICH channel for transmission.
  • the feedback signal is obtained by logical AND operation according to the response information of the two transport blocks of the UE, as long as the response information of one of the transport blocks is NACK,
  • the logical and subsequent feedback signals are NACK.
  • the UE needs to retransmit both the transport blocks, which will affect the throughput performance of the uplink system.
  • the technical problem to be solved by the present invention is to provide an uplink transmission block response information resource allocation method and apparatus, which solves the problem of feeding back response information through a PHICH channel when a plurality of transport blocks are transmitted by a UE.
  • the present invention provides an uplink transmission data block response information.
  • the source allocation method when the terminal sends more than one transport block on an uplink component carrier, the method includes:
  • the base station corresponds to a downlink component carrier or a downlink carrier group.
  • the PHICH group feeds back the response information
  • the downlink carrier group includes one or more downlink component carriers.
  • the method comprises the steps of:
  • the base station calculates the total number of currently available PHICH groups
  • the spreading sequence number of the current PHICH group feedback response information is calculated.
  • the PHICH packet number n /g H is calculated using the following formula:
  • G Enabl ;
  • the present invention further provides a resource allocation device for transmitting data block response information in the uplink, which is applied to a base station, and the device includes: a resource allocation module, configured to: when the terminal is configured to send one or more transport blocks on an uplink component carrier, allocate a PHICH group corresponding to the downlink component carrier corresponding to the uplink component carrier, and use the PHICH group to feed back the response information of the uplink transport block. ; as well as
  • the response information feedback module is configured to: respectively feed back response information of each of the uplink transport blocks through the corresponding PHICH group on the downlink component carrier allocated by the resource allocation module.
  • the resource allocation module is configured to: allocate one downlink component carrier or one downlink carrier group to feed back the response information, where the downlink carrier group includes one or more downlink component carriers.
  • the resource allocation module is configured to: allocate the PHICH group for feeding back the response information by:
  • the resource allocation module is configured to: calculate the PHICH packet number ⁇ by using the following formula:
  • the resource allocation module is set as: ⁇ Calculating the current PHICH group sending response information by using the following formula Spread spectrum sequence number:
  • n sec i ( ⁇ owest I Msroup ⁇ , ⁇ ⁇
  • the present invention is directed to feedback of a response message when a UE in LTE-A supports two transmission blocks simultaneously transmitting
  • the problem is that a new ACK/NACK feedback mechanism is proposed. Under this mechanism, the response information of more than one transport block can be separately transmitted by means of code division multiplexing, or can be separately sent by means of grouping, thereby avoiding The problem of system throughput degradation due to logic and operation is reduced.
  • the invention can reduce the detection and calculation amount of PHICH on the UE side, and has the characteristics of forward and backward compatibility.
  • the present invention transmits downlink by selecting a downlink carrier group for transmitting PHICH.
  • the HARQ information solves the unresolved problem of how to feed back PHICH channel response information on multiple downlink component carriers.
  • only the PHICH channel data needs to be transmitted on one downlink carrier group to carry the HARQ response information of the uplink multiple transport blocks, thereby ensuring the performance of the uplink system throughput.
  • the present invention has a multi-component carrier which is a discrete frequency band, and the downlink carrier group is a large continuous frequency band formed by one or more component carriers, so the downlink The carrier group transmission PHICH can save the frequency domain resources; at the same time, it also reduces the detection calculation amount of the PHICH on the UE side.
  • FIG. 1 is a flowchart of an uplink transmission data block response information resource allocation in an OFDM system according to an embodiment of the present invention.
  • the present invention provides a resource allocation method for uplink transmission block response information, and the core idea is that when a terminal transmits one or more transport blocks on one component carrier, The transport blocks are respectively fed back; further, the PHICH group may be fed back by means of code division multiplexing, or may be separately fed by multiple PHICH groups.
  • the present invention provides a resource allocation method for uplink transmission block response information, including: When the terminal transmits one or more transport blocks on one uplink component carrier, the base station respectively feeds back response information of each uplink transport block through the PHICH on the downlink component carrier corresponding to the uplink component carrier.
  • the base station feeds back the response information by using a downlink component carrier or a corresponding PHICH group of a downlink carrier group;
  • the downlink carrier group includes one or more downlink component carriers.
  • the base station may feed back response information of the multiple transport blocks by using one PHICH group, or feed back response information of multiple transport blocks by using multiple PHICH groups. Specifically, the base station decides whether to feed back multiple PHICH groups or feedback in a PHICH group according to the form of response information of the response information specified by the upper layer.
  • FIG. 1 is a schematic flowchart of a method for allocating an uplink data block response information resource according to an embodiment of the present invention. As shown in FIG. 1, the process mainly includes the following steps:
  • Step 110 The base station obtains, according to the system information, a maximum number of transmission block response information transmissions and a length of the spreading factor.
  • Step 120 The base station searches for a PUSCH resource location minimum index number and a DMRS cyclic offset in the corresponding uplink authorization information (Downlink Control Information 0, referred to as DCI0) according to the location sent by the PUSCH.
  • DCI0 Downlink Control Information
  • Step 130 it is determined whether packet transmission is performed, if yes, step 140 is performed, otherwise, step 150 is performed;
  • Step 140 it is determined whether to perform code division multiplexing, and if so, step 160 is performed, otherwise, step 170 is performed;
  • Step 150 code division multiplexing is enabled to be turned off, and step 170 is performed;
  • Step 160 the packet transmission enable is turned off, and the next step 170 is performed;
  • Step 170 Calculate a group number of the transport block response information transmission and a corresponding spreading code number, and the process ends.
  • the operation process of the uplink transport block response information feedback in the embodiment of the present invention mainly includes the following steps:
  • Step 1 Calculate the total number of PHICH groups available to the current base station according to the UL/DL (uplink/downlink) configuration information and the Ng parameters provided by the upper layer;
  • Step 2 Extract, from the DCI0, the lowest physical resource block (PRB) index information and the cyclic offset information of the demodulation reference signal (DMRS) when the PUSCH is sent;
  • PRB physical resource block index information
  • DMRS demodulation reference signal
  • Table 1 The value corresponding to the DMRS cyclic offset field in DCI0, the correspondence between the cyclic offset value of the DMRS field in DCI0 and 1 ⁇ is shown in Table 1.
  • the left column is a binary number
  • the right side is a decimal number. , both represent cyclic offset information.
  • G EnMe is a packet transmission enable switch. If the response information of M transport blocks is sent in different PHICH groups, then ⁇ is 1, otherwise, G EnMe ⁇ 0.
  • the number of PHICH groups used must be greater than or equal to M, that is, the number of Ms cannot be greater than the total number of PHICH groups.
  • the packet number of the corresponding UE obtained at this time is a value; if the packet is transmitted, the packet number of the UE has multiple values, and the number of values is related to the maximum value M of .
  • Step 4 Calculate the current issued number according to the lengths of the spreading sequences provided by 1 and 2 and the system, using the following formula (2):
  • ⁇ CT has only one value.
  • the same spreading sequence number is used when packet transmission is performed in different PHICH groups.
  • the present invention under the condition that both the packet transmission enable switch and the code division multiplexing enable switch are turned off, the response information resource selection of the single transport block in LTE can be realized, and it can be seen that the present invention has the characteristics of backward compatibility.
  • the present invention is also applicable to the LTE-A carrier aggregation technology.
  • carrier aggregation one carrier group can be used to transmit PHICH information.
  • the carrier group here refers to a continuous carrier frequency band formed by one or more discrete component carriers.
  • the downlink carrier is determined, the range of resource positions for which the PHICH is sent is relatively determined. Come down.
  • the PHICH corresponding to the carrier group herein refers to the corresponding PHICH of one continuous frequency band formed by aggregation of one or more component carriers.
  • the specific carrier group selection and how the downlink component carriers are combined can be flexibly configured according to the system high level indication.
  • the response information of the two transport blocks is sent in different PHICH groups.
  • the feedback process is described as follows:
  • Ns rou p (, ⁇ ow es t
  • the response information of the two transport blocks is sent in the same PHICH group.
  • the details are as follows:
  • the number of transmission blocks of the user equipment is taken as an example, and the delivery of the response information is described.
  • the process is described as follows.
  • the value of M is required to be less than or equal to ⁇ PHICH
  • the value of M is required to be less than or equal to ⁇ PHICH
  • the embodiment of the present invention further provides an uplink transmission data block response information resource allocation device, which is applied to a base station, where the device includes:
  • a resource allocation module configured to allocate, when the terminal sends an input block on an uplink component carrier, the PHICH group corresponding to the downlink component carrier corresponding to the uplink component carrier to use the response information of the uplink transport block;
  • the response information feedback module is configured to respectively feed back response information of each of the uplink transport blocks through the corresponding PHICH group on the downlink component carrier allocated by the resource allocation module.
  • the resource allocation module is configured to allocate one downlink component carrier or one downlink carrier group for feeding back the response information, where the downlink carrier group includes one or more downlink component carriers.
  • the resource allocation module specifically allocates the feedback for using the following steps PHICH group for response information:
  • Step A1 calculating the total number of currently available PHICH groups
  • Step A2 extracting, from the uplink grant information, the lowest PRB index information and the cyclic offset information of the DMRS when the uplink physical shared channel (PUSCH) is sent;
  • Step A3 calculating a PHICH packet number that feeds back the response information
  • Step A4 Calculate a spreading sequence number of the feedback response information of the current PHICH group.
  • the resource allocation module specifically calculates the PHICH packet by using the following formula:
  • the resource allocation module specifically calculates the spread spectrum of the current PHICH group sending response information by using the following formula: Serial number:
  • n sec i ( ⁇ owest I Msroup ⁇ , ⁇ ⁇ ⁇ 2 ⁇ H
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be executed by a computing device
  • the program code is implemented so that they can be stored in the storage device by the computing device, and in some cases, the steps shown or described can be performed in a different order than here, or they can be separately produced.
  • the individual integrated circuit modules are implemented, or a plurality of modules or steps thereof are fabricated into a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the present invention solves the problem of how to transmit PHICH channel response information on a plurality of downlink component carriers by selecting a downlink carrier group for transmitting a PHICH and transmitting downlink HARQ information.
  • only the PHICH channel data needs to be transmitted on one downlink carrier group to carry the HARQ response information of the uplink multiple transport blocks, thereby ensuring the performance of the uplink system throughput.
  • the present invention has a multi-component carrier which is a discrete frequency band, and the downlink carrier group is a large continuous frequency band formed by one or more component carriers, so the downlink The carrier group transmission PHICH can save the frequency domain resources; at the same time, it also reduces the detection calculation amount of the PHICH on the UE side.

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Abstract

本发明公开了一种上行传输数据块应答信息的资源分配方法,终端在一个上行分量载波上发送一个以上传输块时,所述方法包括:基站在所述上行分量载波对应的下行分量载波上通过物理混合自动请求重传指示信道(PHICH)分别反馈每个所述上行传输块的应答信息。本发明还公开了相应装置。本发明与采用多分量载波分别传输PHICH方法相比,由于多分量载波是离散的频率频段,而下行载波组是由一个或多个分量载波聚合而成的一个大的连续的频段,因此下行载波组传输PHICH可以节约频域资源;同时,也减少了UE侧对PHICH的检测计算量。

Description

上行传输数据块应答信息资源分配方法及装置
技术领域
本发明涉及移动通信领域, 尤其涉及一种上行传输数据块应答信息资源 分配方法及装置。
背景技术
数字通信系统的飞速发展对数据通信的可靠性提出了更高的要求,然而, 在恶劣的信道下, 尤其是高数据速率或高速移动环境中, 多径干扰及多谱勒 频移等严重地影响着系统性能。 因此, 有效的差错控制技术, 尤其是混合自 动请求重传 ( Hybrid Auto Repeat Request, 简称为 HARQ )技术就成为通信领 域致力研究的热点。
在 HARQ方式中, 发端发送的码不仅能够检错, 而且还具有一定的纠错 能力。 接收端译码器收到传输块后, 首先检验错误情况, 如果在码的纠错能 力以内, 则自动进行纠错; 如果错误很多, 超出了码的纠错能力, 则能检测 错误出来,接收端通过反馈信道给发端发一个判决信号,要求发端重发信息。 在正交频分复用系统 ( Orthogonal Frequency Division Multiplexing , 简称为 OFDM ) 中, 通过正确应答 /错误应答(ACK/NACK )控制信令来表示传输正 确或错误, 并以此来判断是否需要重传。
在第三代合作伙伴计划 (The 3rd Generation Partnership Project, 简称为
3GPP )长期演进( Long Term Evolution, 简称为 LTE ) 的频分复用系统中, 下行物理信道包含物理控制格式指示信道, 物理下行控制信道和物理混合自 动请求重传指示信道 ( Physical Hybrid ARQ Indicator Channel,简称为 PHICH ) 信道。 其中, PHICH用于传输下行 ACK/NACK信息, 作为上行物理共享信 道( Physical Uplink Shared Channel, PUSCH ) 的 HARQ应答信息。
目前, 在 LTE系统上行技术中, 终端最多支持一个传输块, 因此, 相应 的 PHICH信道只需要 1比特的 HARQ指示符( HI ) 。 当 ΗΙ=1时, 表示正确 确认信息, 基站正确接收了 PUSCH; 当 HI=0时, 表示错误确认信息, 基站 没有正确接收 PUSCH。 该 1比特的 HARQ指示符经过编码, 调制, 扩频后 再映射到相应的 PHICH信道上去。
与现有系统相比, 高级国 际移动通信 ( International Mobile Telecommunications-Advanced , 简称为 IMT-Advanced ) 系统将实现更高的数 据速率和更大的系统容量, 即在低速移动, 热点覆盖情况下峰值速率可以达 到 lGbit/s (比特 /秒) , 在高速移动, 广域覆盖情况下, 峰值速率可以达到 100Mbit/s。 为了满足 ITU-Advanced的要求, 作为 LTE的演进标准高级长期 演进(LTE-A )被要求支持更大的系统带宽(最高可达 100MHz )并且后向兼 容 LTE现有标准。 因此, 在现有 LTE带宽的基础上进行合并从而获取更大带 宽的载波聚合 ( Carrier Aggregation, 简称为 CA )技术就成为 LTE-A系统中 的一项关键技术之一, 釆用该技术能够提高 IMT-Advanced 系统的频谱利用 率, 緩解频谱资源紧缺, 并实现频谱资源优化。
LTE-A系统为满足 IMT-Advanced的上行传输速率的要求, UE上行传 输可以支持多个传输块。根据目前的讨论, LTE-A系统的上行, UE最多能支 持两个传输块同时发送。 因此, 在相应的下行 PHICH信道中, 至少需要反馈 该 UE的两个应答信息。 当前的解决方案是将这两个应答信息通过逻辑与运 算后得到一个反馈信号, 然后釆用 LTE现有的方法, 将这一个反馈信号放在 相应的 PHICH信道中发送。
综上所述, 现有技术中存在如下技术问题: 由于反馈信号是根据 UE的 两个传输块的应答信息通过逻辑与运算得出, 因此, 只要其中有一个传输块 的应答信息为 NACK, 则逻辑与后的反馈信号就为 NACK, 这样, UE在收到 NACK反馈信号后需要对这两个传输块都进行重传, 因而将影响上行系统的 吞吐量性能。
发明内容
本发明解决的技术问题是提供一种上行传输数据块应答信息资源分配方 法及装置, 解决在 UE上发多个传输块时通过 PHICH信道反馈应答信息的问 题。
为解决上述技术问题, 本发明提供了一种上行传输数据块应答信息的资 源分配方法, 终端在一个上行分量载波上发送一个以上传输块时, 所述方法 包括:
基站在所述上行分量载波对应的下行分量载波上通过物理混合自动请求 重传指示信道(PHICH )分别反馈每个所述上行传输块的应答信息。
优选地, 所述基站通过一个下行分量载波或者一个下行载波组相应的
PHICH组反馈所述应答信息;
其中, 所述下行载波组包括一个或多个下行分量载波。
优选地, 所述方法包括以下步骤:
所述基站计算当前可用的 PHICH组总数;
从上行授权信息中提取上行物理共享信道(PUSCH )上发时的最低物理 资源块(PRB ) 索引信息及解调参考信号 (DMRS ) 的循环偏移信息;
计算反馈所述应答信息的 PHICH分组编号; 以及
计算当前 PHICH组反馈应答信息的扩频序列编号。
优选地, 釆用如下公式计算所述 PHICH分组编号 n/g H
n "PgHroIuCpH = (、丄 PoRwBest + τ n ,lDMRS + τ G ^Enable - Ci)m LlloJdUN l PgHroIuCpH + ^ 11 PHICH - l N PgHroIuCpH ', 其中, M为所述传输块的个数, Ci为传输块编号, z=0,l ... M, «DMW为所 述 DMRS的循环偏移信息, Ip':st为所述最低 PRB索引信息, C为当前可 用的 PHICH组总数; 当所述基站通过一个 PHICH组反馈所述应答信息时,
GEnabl = ; 当所述基站通过多个 PHICH组反馈所述应答信息时, GEaMe=l 优选地, 釆用如下公式计算当前 PHICH组反馈应答信息的扩频序列编 号:
nseq = NPHICH
"PHICH
Figure imgf000005_0001
SF ,, 其中, z=0,l ... M, ^为 PHICH调制符号扩频因子的大小, 当所述基 站通过一个 PHICH组反馈所述应答信息时, SEnable = 当所述基站通过多个 PHICH组反馈所述应答信息时, SEnMe =0 本发明还提供了一种上行传输数据块应答信息的资源分配装置, 应用于 基站, 所述装置包括: 资源分配模块, 其设置为: 当获知终端在一个上行分量载波上发送一个 以上传输块时,分配所述上行分量载波对应的下行分量载波相应的 PHICH组 用于反馈所述上行传输块的应答信息; 以及
应答信息反馈模块, 其设置为: 在所述资源分配模块分配的所述下行分 量载波上通过相应的 PHICH组分别反馈每个所述上行传输块的应答信息。
优选地, 所述资源分配模块是设置为: 分配一个下行分量载波或者一个 下行载波组用于反馈所述应答信息, 其中, 所述下行载波组包括一个或多个 下行分量载波。
优选地, 所述资源分配模块是设置为: 通过以下方式分配所述用于反馈 所述应答信息的 PHICH组:
计算当前可用的 PHICH组总数;从上行授权信息中提取上行物理共享信 道(PUSCH )上发时的最低 PRB索引信息及 DMRS的循环偏移信息; 计算 反馈所述应答信息的 PHICH分组编号; 计算当前 PHICH组反馈应答信息的 扩频序列编号。
优选地, 所述资源分配模块是设置为: 釆用如下公式计算所述 PHICH分 组编号^;:
nsroup = ( owest . Ci)modNgroup + 1
11 PHICH PRB τ ,lDMRS τ Q ^Enable J Lll JU l PHICH ^ 1 PHICH - l N PGHROIUCPH ', 其中, M为所述传输块的个数, Ci为传输块编号, z=0,l ...M, «DMW为所 述 DMRS的循环偏移信息, Ip':st为所述最低 PRB索引信息, C为当前可 用的 PHICH组总数; 当所述基站通过一个 PHICH组反馈所述应答信息时,
GEnabl = ; 当所述基站通过多个 PHICH组反馈所述应答信息时, GEaMe =l 优选地, 所述资源分配模块是设置为: 釆用如下公式计算当前 PHICH组 下发应答信息的扩频序列编号:
nseci = (\ owest I Msroup \ , · Π
"PHICH KL1 PRB PHICH Enable (-'、ηοά 2Ν H
llluu ^1 ^ SF ,
其中, z=0,l ...M, ^为 PHICH调制符号扩频因子的大小, 当所述基 站通过一个 PHICH组反馈所述应答信息时, SEnable = 当所述基站通过多个 PHICH组反馈所述应答信息时, SEnMe =0。 本发明针对 LTE-A中的 UE支持两个传输块同时发送时应答消息的反馈 问题, 提出了一种新的 ACK/NACK反馈机制, 此机制下, 大于 1个传输块的 应答信息可通过码分复用的方式实现分别发送, 也可通过分组的方法实现分 别发送, 从而避免了由于逻辑与运算带来的系统吞吐量下降的问题, 同时此 发明可降低 UE侧对 PHICH的检测计算量,并且兼具前向和后向兼容的特点。
与现有技术相比, 本发明通过选择发送 PHICH的下行载波组, 传输下行
HARQ信息,解决了如何在多个下行分量载波反馈 PHICH信道应答信息这个 悬而未决的问题。 在本发明优选实施方案中, 只需要在一个下行载波组上发 送 PHICH信道数据就能携带上行多个传输块的 HARQ应答信息, 保证了上 行系统吞吐量的性能。 本发明与釆用多分量载波分别传输 PHICH方法相比, 由于多分量载波是离散的频率频段, 而下行载波组是由一个或多个分量载波 聚合而成的一个大的连续的频段, 因此下行载波组传输 PHICH可以节约频域 资源; 同时, 也减少了 UE侧对 PHICH 的检测计算量。 附图概述
此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部 分, 本发明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的 不当限定。 在附图中:
图 1为本发明实施例的 OFDM系统中上行传输数据块应答信息资源分配 的流程图。
本发明的较佳实施方式
为了更好解决现有技术中存在的技术问题, 本发明提供一种上行传输数 据块应答信息的资源分配方法, 其核心思想在于, 终端在一个分量载波上发 送一个以上传输块时, 对每个传输块分别进行反馈; 进一步的, 可以通过一 个 PHICH组釆用码分复用的方式反馈, 也可以通过多个 PHICH组分别进行 反馈。
基于上述思想, 本发明提供一种上行传输数据块应答信息的资源分配方 法, 包括: 终端在一个上行分量载波上发送一个以上传输块时, 基站在所述上行分 量载波对应的下行分量载波上通过 PHICH分别反馈每个所述上行传输块的 应答信息。
其中, 所述基站通过一个下行分量载波或者一个下行载波组相应的 PHICH组反馈所述应答信息;
其中, 所述下行载波组包括一个或多个下行分量载波。
即, 所述基站可以利用一个 PHICH组反馈所述多个传输块的应答信息, 或者, 利用多个 PHICH组分别反馈多个传输块的应答信息。 具体地, 基站根 据高层指定的应答信息反馈的形式, 决定是分多个 PHICH组反馈, 还是在一 个 PHICH组中反馈。
为了便于阐述本发明, 以下将结合附图及具体实施例对本发明技术方案 的实施作进一步详细描述。 需要说明的是, 在不冲突的情况下, 本申请中的 实施例及实施例中的特征可以相互任意组合。
图 1为本发明实施例的上行传输数据块应答信息资源分配方法的流程示 意图, 如图 1所示, 该流程主要包括以下步骤:
步骤 110, 基站根据系统信息获得传输块应答信息传输最大组数及扩频 因子的长度;
步骤 120 , 基站根据 PUSCH 上发的位置, 查找相应的上行授权信息 ( Downlink Control Information 0 , 简称为 DCI0 ) 中 PUSCH资源位置最低索 引号及 DMRS循环偏移;
步骤 130, 判断是否进行分组传输, 如果是, 则执行步骤 140, 否则, 执 行步骤 150;
步骤 140, 判断是否进行码分复用, 如果是, 则执行步骤 160, 否则, 执 行步骤 170;
步骤 150, 码分复用使能关闭, 并执行步骤 170;
步骤 160, 分组传输使能关闭, 并执行下一步骤 170; 步骤 170, 计算出传输块应答信息传输的组号及相应的扩频码编号, 该 流程结束。
具体的, 本发明实施例的上行传输块应答信息反馈的操作过程主要包括 以下步骤:
步骤一, 根据 UL/DL (上行 /下行) 配置信息及高层提供的 Ng参数, 计 算出当前基站可用的 PHICH组总数 ;
其中, 为系统配置的在下行载波中可利用的 PHICH组的总数目。 步骤二, 从 DCI0 中提取 PUSCH上发时的最低物理资源块(Physical Resource Block, PRB ) 索引信息及解调参考信号 (Demodulation reference signal, DMRS ) 的循环偏移信息;
步骤三, 利用下式( 1 )计算出 PHICH下发时的 PHICH组编号 ng H: nsroup = ( owest
11 PHICH 、丄 PRB τ ,lDMRS τ Q ^Enable . Ci)m LlloJdUN l PgHroIuCpH + ^ 11 PHICH - 1 N PGHROIUCPH z 1=0 1 ...M ( 1 ) 其中, M为用户设备上发传输块的个数, nDMRS为 DCI0中 DMRS循环偏 移字段对应的取值, /^ 是卩!^^!第 1个时隙中的最低 PRB索引, Ci是传 输块编号, C0代表传输块 0, C1代表传输块 1 , C2代表传输块 2, 等等。
时, 如 !^。!!在子帧 4或 9上发
Figure imgf000009_0001
其中 是 DCI0中 DMRS循环偏移字段对应的取值, DCI0 中 DMRS 字段的循环偏移取值与 1^的对应关系如下表 1所示, 表 1中, 左边一列是 二进制数, 右边是十进制数, 都代表循环偏移信息。
表 1 DCI0中 DMRS字段的循环偏移取值与 nmms的对应关系 Cyclic Shift for DMRS Field
nDMRS
in DCI format 0
000 0
001 1
010 2
on 3
100 4
101 5
110 6
111 7
GEnMe是分组传输使能开关,如果 M个传输块的应答信息在不同的 PHICH 组下发, 则 为 1 , 否则, GEnMe ^ 0。 这里, 如果分组传输使能, 则使用 的 PHICH组的个数必须要大于或等于 M, 即 M的数目不能大于 PHICH组总 数。
如果在同一个 PHICH组传输, 则此时得到的相应 UE的分组编号是一个 值; 如果分组传输, 则 UE的分组编号有多个值,取值个数与 ,的最大取值 M 有关。
步骤四, 根据 1和 2及系统提供的扩频序列的长度, 利用下式(2 )计算 出当前下发 编号:
n CH
Figure imgf000010_0001
+ SEnMe - O)mod 2Ns p CH ( 2 )
其中, z=0,l ...M, M的数目不能大于扩频序列的长度; ^^^为 PHICH 调制符号扩频因子的大小; 是码分复用使能开关,如果 M个传输块的应 答信息在相同的 PHICH组下发, 则 。 ¾&为 1 , 否则, SEnMe为。。
如果在相同的 PHICH组下发, 即 。 ¾fe=0, 则^CT相应的取值只有 1个。 本发明中, 为了降低与其它 UE的 PHICH发生碰撞的概率, 在分组传输即在 不同的 PHICH组下发时, 釆用相同的扩频序列编号。
根据本发明上述方案, 在分组传输使能开关和码分复用使能开关都关闭 的条件下, 可实现 LTE中单传输块的应答信息资源选择, 可见, 本发明具有 后向兼容的特点。 此外,本发明在 LTE-A载波聚合技术下同样适用,在载波聚合的情况下, 可以釆用 1个载波组进行 PHICH信息的下发。这里的载波组是指由一个或多 个离散的分量载波聚合而成的一个连续的载波频段, LTE-A系统中, 一旦下 行载波确定, 那么其下发 PHICH的资源位置的范围也就相对确定下来。 这里 的载波组相应的 PHICH是指一个或多个分量载波聚合后形成的一个连续的 频段的相应的 PHICH。具体的载波组的选择以及下行分量载波之间如何组合, 可根据系统高层指示进行灵活配置。
以下将结合本发明若干应用示例对本发明作更进一步详细的介绍。
应用示例一
两个传输块的应答信息在不同的 PHICH组下发, 反馈过程具体描述如下:
1. 根据 UL/DL配置信息及系统高层提供的 Ng参数, 计算出当前基站可 用的 PHICH组总数 。
2.从 DCI0中提取 PUSCH上发时的最低 PRB索引信息及 DMRS的循环 偏移信息" DMW
3.根据 1和 2提供的信息,利用公式( 1 )计算出 PHICH下发时的 PHICH 组总数。
nsroup = (、丄 owest
11 PHICH PRB τ ,lDMRS τ Q ^Enable . Ci)m LlloJdUN l PgHroIuCpH + ^ 11 PHICH - 1 N PGHROIUCPH z 1=0 1 ...M ( 1 ) 两个传输块在不同的 PHICH组下发, 则(¾ 为 1 CO为 0,C1为 1,代入 式(1 )计算, 可分别获得两个应答信息传输的分组编号。 或者 CO 为 1,C1 为 0,代入式(1 )计算, 可分别获得两个应答信息传输的分组编号。 此处, CO 和 C1的取值不限于 0和 1 , 也可取其它值(取其它值时, 得出的结果与取 0 或 1时相比, 分组编号有偏移量, 但都必须在系统规定的 PHICH组中) 。
4.根据 1和 2及系统提供的扩频序列长度 Cff , 利用公式(2 )计算出 当前 PHICH组下发应答消息时的扩频序列编号 : n cH = i I H H」 + nDMRS + SEnMe · Ci) mod 2Ns p CH ,=0 , 1 ... M ( 2 ) 由于两个传输块相应的应答信息是在不同的 PHICH组下发,此时, SEnMe 为 0
应用示例二
两个传输块的应答信息在相同的 PHICH组下发, 具体描述如下:
1. 根据 UL/DL配置信息及系统高层提供的 Ng参数, 计算出当前基站可 用的 PHICH组总数 。
2.从 DCI0中提取 PUSCH上发时的最低 PRB索引信息及 DMRS的循环 偏移信息。
3.根据 1和 2提供的信息,利用公式( 1 )计算出 PHICH下发时的 PHICH 组总数。
nsroup = ( owest
11 PHICH 、丄 PRB τ ,lDMRS τ Q ^Enable .Ci)m LlloJdUN l PgHroIuCpH + ^11 PHICH - 1 N PGHROIUCPH z 1=01...M (1) 两个传输块在相同的 PHICH组下发, 此时, GEnable ^ 0。
4.根据 1和 2及系统提供的扩频因子长度 , 利用公式(2)计算出 当前 PHICH组下发应答消息时的扩频序列编号 OT n cH = i I H H」 + nDMRS + SEnMe · Ci) mod 2Ns p CH ,=0 , 1... M (2) 由于两个传输块相应的应答信息在相同的 PHICH组下发,此时, SEnM 1 CO为 0, C1为 1, 代入式(2)计算, 可分别获得两个应答信息传输的扩 频序列编号。 或者 CO为 1, C1为 0, 代入式(2)计算, 可分别获得两个应 答信息传输的扩频序列编号。 这里 CO和 C1的取值不限于 0和 1, 也可取其 它值。
应用示例三
本示例中, 以用户设备的传输块数目为 M为例, 对应答信息的下发进行 说明, 其过程描述如下。
1. 根据 UL/DL配置信息及系统高层提供的 Ng参数, 计算出当前基站可 用的 PHICH组总数 。 2.从 DCIO中提取 PUSCH上发时的最低 PRB索引信息及 DMRS的循环 偏移信息。
3.根据 1和 2提供的信息, 计算出 PHICH下发时的 PHICH组总数。
nsroup = ( owest
11 PHICH 、丄 PRB τ ,lDMRS τ Q ^Enable . Ci)m LlloJdUN l PgHroIuCpH + ^ 11 PHICH - 1 N PGHROIUCPH z 1=0 1 ...M ( 1 ) 如果 M个传输块的应答信息在不同的 PHICH组下发, 则(¾ 为 1 , 否 则, GEnable为。。
当在 M个传输块的应答信息在不同的 PHICH组下发时,要求 M的值小 于等于 ^ PHICH
4.根据 1和 2及系统提供的扩频因子长度 Cff , 计算出当前 PHICH组 下发应答信息时的扩频序列编号 。
n cH = i I H H」 + nDMRS + SEnMe · Ci) mod 2Ns p CH ,=0 , 1 ... M ( 2 ) 如果 M个传输块的应答信息在相同的 PHICH组下发, 则^^ &为 1 , 否 则, SEnable为。。
当在 M个传输块的应答信息在相同的 PHICH组下发时, 要求 M的值小 于等于 ^ PHICH
此外, 本发明实施例中还提供了 种上行传输数据块应答信息资源分配 装置, 应用于基站, 所述装置包括:
资源分配模块, 用于当获知终端在一个上行分量载波上发送一个以上传 输块时,分配所述上行分量载波对应的下行分量载波相应的 PHICH组用于反 馈所述上行传输块的应答信息;
应答信息反馈模块, 用于在所述资源分配模块分配的所述下行分量载波 上通过相应的 PHICH组分别反馈每个所述上行传输块的应答信息。
进一步地, 所述资源分配模块用于, 分配一个下行分量载波或者一个下 行载波组用于反馈所述应答信息, 其中, 所述下行载波组包括一个或多个下 行分量载波。
进一步地, 所述资源分配模块具体通过以下步骤分配所述用于反馈所述 应答信息的 PHICH组:
步骤 A1 , 计算当前可用的 PHICH组总数;
步骤 A2 ,从上行授权信息中提取上行物理共享信道( PUSCH )上发时的 最低 PRB索引信息及 DMRS的循环偏移信息;
步骤 A3 , 计算反馈所述应答信息的 PHICH分组编号;
步骤 A4 , 计算当前 PHICH组反馈应答信息的扩频序列编号。
进一步地,所述资源分配模块具体釆用如下公式计算所述 PHICH分组编 „s P ·
J "PHICH ■
nsroup = ( owest . Ci)modNgroup + 1
11 PHICH PRB τ ,lDMRS τ Q ^Enable J Lll JU l PHICH ^ 1 PHICH - l N PGHROIUCPH ', 其中, M为所述传输块的个数, Ci为传输块编号, Z=0,1 ...M, rrDMRS为所 述 DMRS的循环偏移信息, Ip':st为所述最低 PRB索引信息, C为当前可 用的 PHICH组总数; 当所述基站通过一个 PHICH组反馈所述应答信息时,
GEnabl = ; 当所述基站通过多个 PHICH组反馈所述应答信息时, GEaMe=l 进一步地,所述资源分配模块具体釆用如下公式计算当前 PHICH组下发 应答信息的扩频序列编号:
nseci = (\ owest I Msroup \ , · Π ηοά 2Ν H
"PHICH KL1 PRB PHICH Enable (-'、llluu ^1 ^ SF ,
其中, z=0,l ...M, ^为 PHICH调制符号扩频因子的大小, 当所述基 站通过一个 PHICH组反馈所述应答信息时, SEnable = 当所述基站通过多个 PHICH组反馈所述应答信息时, SEnMe =0。
以上仅为本发明的优选实施案例而已, 并不用于限制本发明, 本发明还 可有其他多种实施例, 在不背离本发明精神及其实质的情况下, 熟悉本领域 的技术人员可根据本发明做出各种相应的改变和变形, 但这些相应的改变和 变形都应属于本发明所附的权利要求的保护范围。
显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可 以用通用的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布 在多个计算装置所组成的网络上, 可选地, 它们可以用计算装置可执行的程 序代码来实现, 从而, 可以将它们存储在存储装置中由计算装置来执行, 并 且在某些情况下, 可以以不同于此处的顺序执行所示出或描述的步骤, 或者 将它们分别制作成各个集成电路模块, 或者将它们中的多个模块或步骤制作 成单个集成电路模块来实现。 这样, 本发明不限制于任何特定的硬件和软件 结合。
工业实用性 本发明通过选择发送 PHICH的下行载波组, 传输下行 HARQ信息, 解 决了如何在多个下行分量载波反馈 PHICH信道应答信息这个问题。在本发明 优选实施方案中,只需要在一个下行载波组上发送 PHICH信道数据就能携带 上行多个传输块的 HARQ应答信息, 保证了上行系统吞吐量的性能。 本发明 与釆用多分量载波分别传输 PHICH方法相比, 由于多分量载波是离散的频率 频段, 而下行载波组是由一个或多个分量载波聚合而成的一个大的连续的频 段, 因此下行载波组传输 PHICH可以节约频域资源; 同时, 也减少了 UE侧 对 PHICH 的检测计算量。

Claims

权 利 要 求 书
1、一种上行传输数据块应答信息的资源分配方法, 终端在一个上行分量 载波上发送一个以上传输块时, 所述方法包括:
基站在所述上行分量载波对应的下行分量载波上通过物理混合自动请求 5 重传指示信道(PHICH )分别反馈每个所述上行传输块的应答信息。
2、 如权利要求 1所述的方法, 其中,
所述基站通过一个下行分量载波或者一个下行载波组相应的 PHICH组 反馈所述应答信息;
其中, 所述下行载波组包括一个或多个下行分量载波。
10 3、 如权利要求 2所述的方法, 其中, 所述方法包括以下步骤:
所述基站计算当前可用的 PHICH组总数;
从上行授权信息中提取上行物理共享信道(PUSCH )上发时的最低物理 资源块(PRB ) 索引信息及解调参考信号 (DMRS ) 的循环偏移信息;
计算反馈所述应答信息的 PHICH分组编号; 以及
15 计算当前 PHICH组反馈应答信息的扩频序列编号。
4、 如权利要求 3所述的方法, 其中,
釆用如下公式计算所述 PHICH分组编号^;:
nsroup = ( owest
11 PHICH 、丄 PRB τ ,lDMRS τ Q ^Enable . Ci)m LlloJdUN l PgHroIuCpH + ^ 11 PHICH - l N PGHROIUCPH ', 其中, M为所述传输块的个数, Ci为传输块编号, z=0,l ...M, «DMW为所 20 述 DMRS的循环偏移信息, 为所述最低 PRB索引信息, 为当前可 用的 PHICH组总数; 当所述基站通过一个 PHICH组反馈所述应答信息时,
GEnabl = ; 当所述基站通过多个 PHICH组反馈所述应答信息时, GEaMe=l。
5、 如权利要求 3或 4所述的方法, 其中,
釆用如下公式计算当前 PHICH组反馈应答信息的扩频序列编号: J
Figure imgf000016_0001
1 SF ,
其中,
Figure imgf000016_0002
...Μ, ^为 PHICH调制符号扩频因子的大小, 当所述基 站通过一个 PHICH组反馈所述应答信息时, „。6fe=l ; 当所述基站通过多个 PHICH组反馈所述应答信息时, SEnMe =0。
6、 一种上行传输数据块应答信息的资源分配装置, 应用于基站, 所述装 置包括:
资源分配模块, 其设置为: 当获知终端在一个上行分量载波上发送一个 以上传输块时,分配所述上行分量载波对应的下行分量载波相应的 PHICH组 用于反馈所述上行传输块的应答信息; 以及
应答信息反馈模块, 其设置为: 在所述资源分配模块分配的所述下行分 量载波上通过相应的 PHICH组分别反馈每个所述上行传输块的应答信息。
7、 如权利要求 6所述的装置, 其中,
所述资源分配模块是设置为: 分配一个下行分量载波或者一个下行载波 组用于反馈所述应答信息, 其中, 所述下行载波组包括一个或多个下行分量 载波。
8、 如权利要求 6或 7所述的装置, 其中, 所述资源分配模块是设置为: 通过以下方式分配所述用于反馈所述应答信息的 PHICH组:
计算当前可用的 PHICH组总数;从上行授权信息中提取上行物理共享信 道(PUSCH )上发时的最低 PRB索引信息及 DMRS的循环偏移信息; 计算 反馈所述应答信息的 PHICH分组编号; 计算当前 PHICH组反馈应答信息的 扩频序列编号。
9、 如权利要求 8所述的装置, 其中,
所述资源分配模块是设置为: 釆用如下公式计算所述 PHICH分组编号 nsrouP · nsm"p = (jiowest
PHICH · 11 PHICH 1 PRB τ ,lDMRS τ Q ^Enable . Ci) Jm LlloJdUN l PgHroIuCpH + ^ 11 PHICH - l N PGHROIUCP
11 H '
其中, M为所述传输块的个数, Ci为传输块编号, z=0,l ...M, «DMW为所 述 DMRS的循环偏移信息, Ip':st为所述最低 PRB索引信息, C为当前可 用的 PHICH组总数; 当所述基站通过一个 PHICH组反馈所述应答信息时,
GEnabl = ; 当所述基站通过多个 PHICH组反馈所述应答信息时, GEaMe=l。
10、 如权利要求 8所述的装置, 其中,
所述资源分配模块是设置为:釆用如下公式计算当前 PHICH组下发应答 信息的扩频序列编号:
nseci = est I Msroup \ , ·Π
"PHICH ( K\ ow
L1 PRB PHICH Enable (-'、ηοά2Ν H
llluu ^1^ SF ,
其中, z=0,l...M, ^为 PHICH调制符号扩频因子的大小, 当所述基 站通过一个 PHICH组反馈所述应答信息时, SEnable= 当所述基站通过多个 PHICH组反馈所述应答信息时, S =0
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