WO2012048567A1 - 抑制同频干扰的方法及装置 - Google Patents

抑制同频干扰的方法及装置 Download PDF

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Publication number
WO2012048567A1
WO2012048567A1 PCT/CN2011/074010 CN2011074010W WO2012048567A1 WO 2012048567 A1 WO2012048567 A1 WO 2012048567A1 CN 2011074010 W CN2011074010 W CN 2011074010W WO 2012048567 A1 WO2012048567 A1 WO 2012048567A1
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Prior art keywords
connection
hybrid automatic
automatic repeat
repeat request
feedback information
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PCT/CN2011/074010
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English (en)
French (fr)
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王令斌
董明慧
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中兴通讯股份有限公司
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Publication of WO2012048567A1 publication Critical patent/WO2012048567A1/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
    • 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

Definitions

  • the present invention relates to a wireless communication system, and more particularly to a method and apparatus for suppressing co-channel interference in a wireless communication system. Background technique
  • Hybrid Automatic Repeat Request (HARQ) is supported in wireless communication systems such as WiMax and LTE.
  • Hybrid automatic retransmission is a combination of Automatic Repeat Request (ARQ) and Forward Error Correction (FEC).
  • ARQ Automatic Repeat Request
  • FEC Forward Error Correction
  • the data received by the receiving end to the transmitting end receives a status report including acknowledgement (ACK) and no acknowledgement (NACK) information.
  • ACK indicates that the receiving end correctly receives data
  • NACK indicates that the receiving end detects that the data is incorrect, and the transmitting end needs to retransmit the data.
  • FIG. 1 shows a schematic diagram of three omni-directional base stations using a 3/4 FFR network.
  • FFR Fractional Frequency Reuse
  • Figure 1 shows a schematic diagram of three omni-directional base stations using a 3/4 FFR network.
  • one carrier is divided into four sub-carriers, and the area near the base station (the inner ring shown) is generally not Will be interfered by the same base station, and use the same set of subcarriers (ie, inner loop subcarrier set or shared subcarrier set) to transmit data; the area far from the base station (outer loop shown) is vulnerable to neighboring base stations.
  • subcarriers ie, inner loop subcarrier set or shared subcarrier set
  • co-channel interference data is transmitted using different sets of subcarriers (ie, outer loop subcarrier sets).
  • Communication systems generally include multiple connections, such as the WiMax system (IEEE802.16e).
  • the IEEE802.16e protocol divides the connection into a management connection and a service connection.
  • the management connection includes: a primary management connection, a basic management connection, and a second management connection; Connections include: Unsolicited Grant Service (UGS), Real-Time Variable Rate (Real-Time variable-rate) Service, RTVR), Non-Real-Time variable-rate service (NRTVR), Best-Effort Service (BE), Extended Real-Time Variable Service (Extended Real-Time variable - Rate service, ERTVR) Five business types.
  • the user may have multiple connections in the connection type at the same time. If the same transmission subcarrier set is used for different connection types of the user in the inner ring or outer ring area, the spectrum is reduced. Utilization. For example, if the user is in the outer ring area shown in Figure 1, the data should be sent using the outer ring subcarrier set for all connections according to the method shown in Figure 1. However, the user may have multiple connection types at the same time, some of which are The real-time requirement is low. For these types of connections with low real-time requirements, using the outer-loop sub-carrier set to transmit data will result in waste of the outer-loop sub-carrier set. Summary of the invention
  • the main technical problem to be solved by the present invention is to provide a method and apparatus for suppressing co-channel interference, which can suppress co-channel interference and improve spectrum utilization when a user has multiple connection type scenarios.
  • the present invention provides a method for suppressing co-channel interference, including: determining, according to feedback information of a hybrid automatic repeat request, a connection type of a connection corresponding to the hybrid automatic repeat request, according to a connection type of the connection and The connected hybrid automatic repeat request feedback information determines a set of subcarriers for transmitting data to the connection.
  • determining, according to the feedback information of the hybrid automatic repeat request, the connection type of the hybrid automatic repeat request corresponding connection comprises: determining, according to a burst attribute of data corresponding to the feedback information of the hybrid automatic repeat request The hybrid automatic repeat request corresponds to the connection property of the connection; determining, according to the connection property, the connection type of the connection corresponding to the hybrid automatic repeat request,
  • the method further includes: updating the hybrid automatic repeat request feedback information to the connected connection type.
  • the set of subcarriers is an inner loop subcarrier set or an outer loop subcarrier set, and inner loop subcarrier sets are the same between adjacent base stations, and outer loop subcarrier sets are different.
  • the determining, according to the connection type of the connection and the hybrid automatic retransmission request feedback information of the connection, determining a subcarrier set for transmitting data to the connection includes: presetting a connection type of the connection a performance threshold, determining a performance value of the connection according to the hybrid automatic retransmission request feedback information of the connection; comparing the performance value with the performance threshold, if the performance threshold is greater than the performance threshold, the connection Transmitting data with an outer ring subcarrier set; if less than the performance threshold, the connection transmits data with an inner ring subcarrier set.
  • the performance value is a value of a packet loss rate
  • the performance value is a packet loss rate.
  • the method further includes obtaining a channel quality for communicating with the user, determining, according to the channel quality and the connection type of the connection, and the hybrid automatic repeat request feedback information of the connection, for sending to the connection The set of subcarriers of the data.
  • the determining, according to the channel quality, the connection type of the connection, and the hybrid automatic retransmission request feedback information of the connection, determining a subcarrier set for transmitting data to the connection includes: The set of subcarriers determined by the channel quality is the same as the set of subcarriers determined according to the connection type of the connection and the hybrid automatic repeat request feedback information of the connection, and then the data is transmitted by using the subcarrier set.
  • the method further includes determining whether the data sent by using the subcarrier set satisfies a quality of service indicator, and using the subcarrier set to send data to meet a quality of service indicator, The set of subcarriers transmits data.
  • An apparatus for suppressing co-channel interference comprising: a determining module, a determining module, wherein the determining module is configured to determine, according to the feedback information of the hybrid automatic repeat request, a connection type of the hybrid automatic repeat request corresponding connection;
  • the decision module is configured to determine a set of subcarriers for transmitting data to the connection according to the connection type of the connection and the hybrid automatic repeat request feedback information of the connection.
  • the apparatus further includes: a channel quality decision and a finalization module; wherein, the channel quality decision module is configured to determine a subcarrier set for transmitting data according to the channel quality; and the finalizing module is configured to determine the Whether the subcarrier set determined by the decision module is the same as the subcarrier set determined by the channel quality decision module, and if the same, the final module further determines whether the data sent by using the subcarrier set satisfies the service quality indicator, and if yes, Then, the data is transmitted by using the subcarrier set.
  • connection type of the connection can be determined according to the HARQ feedback information
  • sub-sentence for transmitting data to the connection is determined according to the connection type of the connection and the HARQ feedback information of the connection.
  • the carrier set implements a partial frequency reuse strategy for the connection and improves the utilization of the spectrum.
  • the present invention also considers the influence of channel quality on the subcarrier set and whether the subcarrier set can meet the requirements of the quality of service indicator, and comprehensively considers the final subcarrier set in various aspects, thereby further improving the spectrum utilization.
  • Figure 1 is a schematic diagram of 3/4FFR networking for three omnidirectional stations
  • FIG. 2 is a flowchart of determining a subcarrier according to an embodiment of the present invention
  • FIG. 3 is a flowchart of determining a subcarrier according to another embodiment of the present invention. detailed description
  • the present invention is applicable to systems supporting hybrid automatic repeat request HARQ technology and partial frequency reuse FFR technology, such as WiMax system (IEEE 802.16e) and LTE system (3gpp protocol).
  • WiMax system IEEE 802.16e
  • LTE system 3gpp protocol
  • WiMax system IEEE 802.16e
  • a method for suppressing co-channel interference including steps:
  • the HARQ feedback information mainly includes: determining ACK and not confirming NACK information;
  • the B. Determine, according to the HARQ feedback information, a connection type corresponding to different connections of the user.
  • the HARQ feedback information mainly the ACK or NACK information, is saved to the corresponding connection type, and the HARQ feedback information under the connection type is updated;
  • the above step A includes:
  • the period collects HARQ feedback information on different connections of the user, and determines the connection attribute of the connection according to the burst attribute of the data corresponding to the HARQ feedback information. That is, determine the connection type of the connection.
  • the so-called burst attribute means that the data burst is based on the connection, that is, the data belongs to a certain connection;
  • the connection attribute refers to the maximum/minimum rate guarantee of the connection, delay, jitter, etc., for different connection types,
  • the connection properties are different, that is, the specific connection type can be determined by the correspondence between the connection property and the connection type.
  • the above step B includes:
  • connection type is determined according to the connection attribute, and the HARQ feedback information is updated to the corresponding connection type.
  • the ACK or NACK information may indicate the connection performance of the connection type at the current time or period T. For example, when a certain type of connection of a user feeds back NACK information for a long time, it indicates that the transmission subcarrier set used on the connection is subject to large interference. , you need to consider replacing the transmit carrier set with better performance.
  • Step c includes:
  • the carrier is divided into an inner loop subcarrier set and an outer loop subcarrier set, the inner loop subcarrier sets of the neighboring base stations are the same, and the outer loop subcarrier sets are different;
  • the C2 Determine the set of subcarriers to transmit data to the connection according to the type of the connection and the HARQ feedback condition of the connection in the period T, that is, determine whether to use the inner loop subcarrier set or the outer loop subcarrier set to transmit data.
  • the period T can be a time or a time period.
  • An implementation manner of the step C2 is: when the user has the connection between the active authorization service UGS and the real-time variable rate service RTVR, setting the corresponding performance threshold for the UGS type connection, and setting the corresponding performance for the RTVR type connection.
  • the value of the value of the value of the user's UGS type which is fed back in the period T, according to the UGS type of the user's UGS type, compares the performance value and the performance threshold, and if the performance value is greater than the performance threshold, the outer loop subcarrier set is used. Send data. If the performance value is less than the performance threshold, the data is sent using the inner loop subcarrier set.
  • the performance value may be a packet loss rate, and the corresponding performance threshold is a packet loss rate.
  • the value of the parameter that can be used to reflect the connection performance determined according to the HARQ information can implement the present invention, for example, the performance value is the number of retransmissions of the HARQ, and the corresponding performance threshold is the retransmission threshold; the performance value is IR. HARQ retransmission code in mode, etc.
  • Embodiment 1 Although a differentiated partial frequency reuse strategy is implemented for different connection types. However, it only considers the type of connection and ignores channel quality and/or quality of service indicators.
  • the channel quality reflects the advantages and disadvantages of the channel for transmitting data between the base station and the mobile station. If the channel quality is good, the data may be transmitted by using the inner ring subcarrier set. If the channel quality is poor, the outer loop subcarrier set may be considered to transmit data.
  • IEEE 802.16e specifies QOS policies for different types of connections, namely quality of service indicators.
  • the quality of service indicator refers to the minimum requirements to be met by different connection types, such as the minimum rate.
  • the transmit subcarrier set When determining the transmit subcarrier set according to the channel quality and the connection type, whether the transmit subcarrier set satisfies the quality of service indicator, for example, whether the transmission rate is lower than the minimum rate when the transmit subcarrier set is used, and if so, The overall quality of service should consider the set of transmit subcarriers with better performance.
  • Step 1 Determine the quality of the channel used for communication with the user, and initially determine the transmit subcarrier set based on the channel quality. For example, the carrier interference and noise ratio (CINR) is used to determine the transmit subcarrier set. If the CINR is lower than a certain threshold, consider using the outer loop subcarrier set to transmit data. If the CINR is higher than a certain threshold, consider using the inner loop subcarrier set. send data;
  • CINR carrier interference and noise ratio
  • Step 2 Determine the connection type of the connection, and determine the transmission subcarrier set according to the connection type of the connection and the HARQ feedback information of the connection.
  • This step can refer to the manner of Embodiment 1;
  • Step 3 If the set of transmitting subcarriers determined according to steps 1 and 2 is the same, that is, the same as the inner ring or the outer ring, and the data is transmitted by using the subcarrier set, the quality of service (QOS) indicator of the connection type can be satisfied. Then, the data is transmitted by using the transmission subcarrier set; if the transmission subcarrier set determined according to steps 1 and 2 is different, or although the determined transmission subcarrier set is the same, the data transmitted by using the subcarrier set cannot satisfy the service quality indicator. , the composition of the transmitted subcarrier set is not changed, that is, the data is transmitted using the original subcarrier set.
  • QOS quality of service
  • a subcarrier set used for communication with the user is initially determined according to the channel quality, and then a subcarrier set used for a certain type of connection of the user is determined according to the HARQ feedback information, and finally the service quality indicator is comprehensively considered.
  • a subcarrier set used for communication with the user is initially determined according to the channel quality, and then a subcarrier set used for a certain type of connection of the user is determined according to the HARQ feedback information, and finally the service quality indicator is comprehensively considered.
  • multiple different subcarrier sets are used for different types of connections to suppress the same-frequency interference and further improve spectrum utilization.
  • Example 3 The invention also provides an apparatus for suppressing co-channel interference, comprising:
  • a determining module configured to determine, according to the feedback information of the hybrid automatic repeat request, a connection type of the connection corresponding to the hybrid automatic repeat request;
  • a decision module configured to determine, according to the connection type of the connection and the hybrid automatic retransmission request feedback information of the connection in the period T, a subcarrier set for transmitting data to the connection;
  • a channel quality decision module configured to determine a subcarrier set for transmitting data according to a channel quality
  • a finalizing module configured to determine whether a subcarrier set determined by the decision module is the same as a subcarrier set determined by the channel quality decision module And if the same, the final module further determines whether the data sent by using the subcarrier set satisfies a quality of service indicator, and if yes, transmits the data by using the subcarrier set.
  • the apparatus for suppressing co-channel interference improves the spectrum utilization rate while suppressing the same-frequency interference.

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Abstract

本发明公开了一种抑制同频干扰的方法及装置,该方法和装置是基于用户的不同连接类型的,首先根据连接的混合自动重传请求反馈信息确定该连接的连接类型,然后根据该连接的连接类型和该连接的混合自动重传请求反馈信息确定用于向该连接发送数据的子载波集,从而实现针对不同的连接类型实现不同的频率复用策略,在抑制同频干扰的同时,提高了频谱的利用率。

Description

抑制同频干扰的方法及装置 技术领域
本发明涉及无线通讯系统, 尤其是无线通讯系统中抑制同频干扰的方 法及装置。 背景技术
在无线通讯系统比如 WiMax、 LTE等系统中, 都支持混合自动重传请 求( Hybrid Automatic Repeat Request, 即 HARQ )。 混合自动重传是自动重 传 ( Automatic Repeat Request , ARQ ) 和前向纠错编码 ( Forward Error Correction, FEC )结合的技术。 在 HARQ系统中, 接收端反馈给发送端的 数据接收到状态报告包括确认(ACK ) 和不确认(NACK )信息。 其中, ACK表示接收端正确接收数据, 而 NACK则表示接收端检测到数据有误, 需要发送端重传该数据。
无线通讯系统, 比如 WiMax、 LTE 等系统一般釆用部分频率复用 ( Fractional Frequency Reuse, FFR ) 的方式来抑制同频组网带来的干扰。 比如, 图 1所示为三个全向基站釆用 3/4FFR组网的示意图, 如图 1所示, 一个载波被划分为四个子载波, 距离基站近的区域(图示内环)一般不会 受到相邻基站的同频干扰, 釆用相同的子载波集(即内环子载波集或共享 子载波集)发送数据; 距离基站远的区域(图示外环)容易受到相邻基站 的同频干扰, 釆用不同的子载波集(即外环子载波集)发送数据。
通讯系统一般都包括多种连接, 比如 WiMax 系统 (IEEE802.16e ), IEEE802.16e协议将连接分为管理连接和业务连接, 管理连接包括: 主管理 连接、 基本管理连接、 第二管理连接; 业务连接又包括: 主动授权业务 ( Unsolicited Grant Service, UGS )、实时变速率业务 (Real-Time variable-rate service , RTVR)、 非实时更速率业务 (Non-Real-Time variable-rate service, NRTVR)、 尽力而为业务 (Best-Effort Service, BE)、 扩展的实时变速率业务 (Extended Real-Time variable -rate service , ERTVR)五种业务类型。
实际应用中, 用户可能同时存在上述连接类型中的多种连接, 如果此 时以该用户处于内环或外环区域对该用户的不同连接类型釆用相同的发送 子载波集, 则降低了频谱的利用率。 比如, 用户处于图 1所示的外环区域, 则按图 1所示的方法应该对其所有连接使用外环子载波集发送数据, 但是, 用户可能同时存在多种连接类型, 其中某些类型对实时性要求低, 对于这 些对实时性要求低的类型的连接使用外环子载波集发送数据, 则会造成外 环子载波集的浪费。 发明内容
本发明要解决的主要技术问题是, 提供一种抑制同频干扰的方法和装 置, 该方法和装置能在用户存在多种连接类型的场景时, 抑制同频干扰, 提高频谱利用率。
为解决上述技术问题, 本发明提供一种抑制同频干扰的方法, 包括:根 据混合自动重传请求的反馈信息确定该混合自动重传请求对应连接的连接 类型, 根据所述连接的连接类型和所述连接的混合自动重传请求反馈信息 确定用于向所述连接发送数据的子载波集。
一种实施方式中, 所述根据混合自动重传请求的反馈信息确定该混合 自动重传请求对应连接的连接类型包括: 根据混合自动重传请求的反馈信 息所对应数据的突发属性, 确定该混合自动重传请求对应连接的连接属性; 根据所述连接属性, 确定该混合自动重传请求对应连接的连接类型,
所述根据混合自动重传请求的反馈信息确定该混合自动重传请求对应 连接的连接类型之后, 该方法还包括: 将该混合自动重传请求反馈信息更 新到所述连接的连接类型下。 一种实施方式中, 所述子载波集为内环子载波集或外环子载波集, 相 邻基站间的内环子载波集相同, 外环子载波集相异。
一种实施方式中, 所述根据所述连接的连接类型和所述连接的混合自 动重传请求反馈信息确定用于向所述连接发送数据的子载波集包括: 预设 所述连接的连接类型的性能阔值, 根据所述连接的混合自动重传请求反馈 信息确定所述连接的性能值; 将所述性能值和所述性能阔值比较, 若大于 所述性能阔值, 则所述连接用外环子载波集发送数据; 若小于所述性能阔 值, 则所述连接用内环子载波集发送数据。
一种实施方式中, 所述性能阔值为丟包率阔值, 所述性能值为丟包率。 一种实施方式中, 该方法还包括获得与用户通信的信道质量, 根据所 述信道质量和所述连接的连接类型及所述连接的混合自动重传请求反馈信 息确定用于向所述连接发送数据的子载波集。
一种实施方式中, 所述根据所述信道质量和所述连接的连接类型及所 述连接的混合自动重传请求反馈信息确定用于向所述连接发送数据的子载 波集包括: 若根据所述信道质量确定的子载波集与根据所述连接的连接类 型及所述连接的混合自动重传请求反馈信息确定的子载波集相同, 则釆用 所述子载波集发送数据。
一种实施方式中, 确定用于发送数据的子载波集后, 还包括确定使用 所述子载波集发送数据是否满足服务质量指标, 使用所述子载波集发送数 据满足服务质量指标, 则釆用所述子载波集发送数据。
一种抑制同频干扰的装置, 该装置包括: 确定模块、 判决模块; 其中, 确定模块, 设置为根据混合自动重传请求的反馈信息确定该混合自动 重传请求对应连接的连接类型;
判决模块, 设置为根据所述连接的连接类型和所述连接的混合自动重 传请求反馈信息确定用于向所述连接发送数据的子载波集。 一种实施方式中, 该装置还包括: 信道质量判决和终决模块; 其中, 信道质量判决模块, 设置为根据信道质量确定用于发送数据的子载波 集; 终决模块, 设置为判断所述判决模块确定的子载波集与所述信道质量 判决模块确定的子载波集是否相同, 若相同, 所述终决模块还判断釆用所 述子载波集发送数据是否满足服务质量指标, 若满足, 则釆用所述子载波 集发送数据。
本发明的有益效果是: 由于 HARQ 的使能是基于连接的, 所以根据 HARQ反馈信息可以确定连接的连接类型, 根据连接的连接类型和连接的 HARQ反馈信息综合确定用于向连接发送数据的子载波集, 实现针对连接 的部分频率复用策略, 提高频谱的利用率。
本发明还考虑了信道质量对子载波集的影响及釆用所述子载波集是否 能满足服务质量指标的要求, 从多方面综合考虑以确定最终的子载波集, 从而进一步提高频谱利用率。 附图说明
图 1为三个全向站釆用 3/4FFR组网示意图;
图 2为本发明一种实施方式的确定子载波流程图;
图 3为本发明另一种实施方式的确定子载波流程图。 具体实施方式
本发明适用于支持混合自动重传请求 HARQ技术和部分频率复用 FFR 技术的系统, 比如, WiMax系统( IEEE 802.16e )和 LTE系统( 3gpp协议) 等。 本发明以 WiMax系统( IEEE 802.16e )为例来具体说明:
实施例 1 :
如图 2所示, 在用户同时存在一种或多种连接类型时, 比如同时存在 主动授权业务(UGS )和实时变速率业务(RTVR )的连接时, 本实施方式 抑制同频干扰的方法, 包括步骤:
A、 收集用户不同连接的 HARQ反馈信息; HARQ反馈信息主要包括: 确定 ACK和不确认 NACK信息;
B、 根据 HARQ反馈信息确定用户不同连接对应的连接类型。 同时将 HARQ反馈信息, 主要是指 ACK或 NACK信息, 保存到对应的连接类型 下, 并更新该连接类型下的 HARQ反馈信息;
C、 确定用于向连接发送数据的发送子载波集。
上述步骤 A包括:
周期 (秒级, 比如 Is )性地收集用户不同连接上的 HARQ反馈信息, 根据 HARQ反馈信息对应数据的突发属性, 确定该连接的连接属性。 即确 定连接的连接类型。
所谓的突发属性是指数据突发是基于连接的, 也就是该数据是属于某 种连接的; 连接属性是指连接的最大 \最小速率保证、 时延、 抖动等, 对于 不同的连接类型, 连接属性不同, 也就是说, 可以通过连接属性与连接类 型的对应关系, 确定具体的连接类型。
上述步骤 B包括:
根据连接属性确定连接类型, 将 HARQ反馈信息更新到对应的连接类 型下。 主要是更新 ACK和 NACK信息。 ACK或 NACK信息可以表示连接 类型在当前时刻或周期 T 内的连接性能, 比如, 当某用户某类型的连接长 时间反馈 NACK信息, 则表示此连接上使用的发送子载波集受到较大的干 扰, 需要考虑更换性能更好的发送载波集。
通过读取 HARQ反馈信息, 分析出其对应的连接类型, 将其保存到对 应的连接类型下, 并更新该连接类型下的 HARQ反馈信息, 从而可以表示 该连接类型上的连接在一定时间内的连接情况, 为基站确定该类型的连接 的发送子载波集做准备。 步骤 c包括:
CI:将载波分为内环子载波集和外环子载波集, 相邻基站的内环子载波 集相同, 外环子载波集不同;
C2:根据连接的类型和该连接在周期 T内的 HARQ反馈情况,确定向该 连接发送数据的子载波集, 即确定是釆用内环子载波集, 还是外环子载波 集发送数据。 该周期 T可以是一个时刻, 也可以是一个时间段。
步骤 C2的一种实施方式是, 当用户同时存在主动授权业务 UGS和实 时变速率业务 RTVR的连接时,对 UGS类型的连接设置其对应的性能阔值, 对 RTVR类型的连接设置其对应的性能阔值,根据该用户 UGS类型的连接 在周期 T内反馈的 HARQ信息该用户 UGS类型连接的性能值, 比较性能 值和性能阔值, 若性能值大于性能阔值, 则用外环子载波集发送数据, 若 性能值小于性能阔值, 则用内环子载波集发送数据。
更具体的, 该性能值可以是丟包率, 与之对应的性能阔值为丟包率阔 值。 可以理解的是, 根据 HARQ信息确定的其它能反映连接性能的参数值 均可以实现本发明, 比如性能值为 HARQ的重传次数, 对应的性能阔值为 重传次数阔值; 性能值为 IR模式下的 HARQ的重传码等。
釆用本实施例的方法, 针对连接的具体类型, 釆用与之对应的部分频 率复用策略, 从而实现针对连接的部分频率复用, 在抑制干扰的同时, 提 高了频谱利用率。 实施例 2:
实施例 1虽然针对不同的连接类型实现了差异化的部分频率复用策略。 但其只考虑了连接类型, 而忽略了信道质量和 /或服务质量指标。
信道质量反映了基站与移动台之间发送数据的通道的优劣, 如果信道 质量好, 可以考虑用内环子载波集发送数据, 若信道质量差, 可以考虑用 外环子载波集发送数据; IEEE 802.16e规定了不同类型连接的 QOS策略, 即服务质量指标。 服 务质量指标是指不同连接类型所要满足的最低要求, 比如, 最小速率等。 根据信道质量和连接类型确定发送子载波集时, 还可以考虑该发送子载波 集是否满足服务质量指标, 比如用该发送子载波集发送数据时, 发送速率 是否低于最小速率, 若是, 则从整体服务质量上应该考虑性能更好的发送 子载波集。
如图 3所示, 本实施方式的流程为:
步骤 1、确定与用户通信所用的信道的质量, 并根据此信道质量初步确 定发送子载波集。 比如, 用载波干扰噪声比 (CINR )确定发送子载波集, 若 CINR低于一定阔值, 考虑用外环子载波集发送数据; 若 CINR高于一定 的阔值, 考虑使用内环子载波集发送数据;
步骤 2、 确定连接的连接类型, 根据该连接的连接类型和该连接的 HARQ反馈信息确定发送子载波集。 此步可以参照实施例 1的方式;
步骤 3、若根据步骤 1和步骤 2确定的发送子载波集相同, 即同为内环 或同为外环, 并且使用该子载波集发送数据能满足该连接类型的服务质量 ( QOS )指标, 则釆用该发送子载波集发送数据; 若根据步骤 1 和步骤 2 确定的发送子载波集不同, 或者虽然确定的发送子载波集相同, 但釆用该 子载波集发送数据不能满足服务质量指标, 则不改变发送子载波集的组成, 即釆用原来的子载波集发送数据。
该实施方式, 对某一用户连接, 首先根据信道质量初步确定与用户通 信所用的子载波集, 然后根据 HARQ反馈信息确定对于用户某一类型的连 接所用的子载波集, 最后综合考虑服务质量指标。 实现用户多种类型连接 共存的复杂场景下, 针对不同类型的连接釆用不同的子载波集, 实现抑制 同频干扰的同时, 进一步提高频谱利用率。 实施例 3: 本发明还提供了一种抑制同频干扰的装置, 包括:
确定模块, 用于根据混合自动重传请求的反馈信息确定该混合自动重 传请求对应连接的连接类型;
判决模块, 用于根据所述连接的连接类型和周期 T 内所述连接的混合 自动重传请求反馈信息确定用于向所述连接发送数据的子载波集;
信道质量判决模块, 用于根据信道质量确定用于发送数据的子载波集; 终决模块, 用于判断所述判决模块确定的子载波集与所述信道质量判 决模块确定的子载波集是否相同, 若相同, 所述终决模块还判断釆用所述 子载波集发送数据是否满足服务质量指标, 若满足, 则釆用所述子载波集 发送数据。
本实施例抑制同频干扰的装置, 在抑制同频干扰的同时, 提高频谱利 用率。
以上内容是结合具体的实施方式对本发明所作的进一步详细说明, 不 能认定本发明的具体实施只局限于这些说明。 对于本发明所属技术领域的 普通技术人员来说, 在不脱离本发明构思的前提下, 还可以做出若干简单 推演或替换, 都应当视为属于本发明的保护范围。

Claims

权利要求书
1、 一种抑制同频干扰的方法, 该方法包括:
根据混合自动重传请求的反馈信息确定该混合自动重传请求对应连接 的连接类型;
根据所述连接的连接类型和所述连接的混合自动重传请求反馈信息确 定用于向所述连接发送数据的子载波集。
2、 如权利要求 1所述的抑制同频干扰的方法, 其中所述根据混合自动 重传请求的反馈信息确定该混合自动重传请求对应连接的连接类型包括: 根据混合自动重传请求的反馈信息所对应数据的突发属性, 确定该混 合自动重传请求对应连接的连接属性;
根据所述连接属性, 确定该混合自动重传请求对应连接的连接类型, 所述根据混合自动重传请求的反馈信息确定该混合自动重传请求对应 连接的连接类型之后, 该方法还包括: 将该混合自动重传请求反馈信息更 新到所述连接的连接类型下。
3、 如权利要求 1所述的抑制同频干扰的方法, 其中所述子载波集为内 环子载波集或外环子载波集, 相邻基站间的内环子载波集相同, 外环子载 波集相异。
4、 如权利要求 3所述的抑制同频干扰的方法, 其中所述根据所述连接 的连接类型和所述连接的混合自动重传请求反馈信息确定用于向所述连接 发送数据的子载波集包括:
预设所述连接的连接类型的性能阔值, 根据所述连接的混合自动重传 请求反馈信息确定所述连接的性能值; 将所述性能值和所述性能阔值比较, 若大于所述性能阔值, 则所述连接用外环子载波集发送数据; 若小于所述 性能阔值, 则所述连接用内环子载波集发送数据。
5、 如权利要求 4所述的抑制同频干扰的方法, 其中所述性能阔值为丟 包率阔值, 所述性能值为丟包率。
6、 如权利要求 1至 5任一项所述的抑制同频干扰的方法, 该方法还包 括:
获得与用户通信的信道质量, 根据所述信道质量和所述连接的连接类 型及所述连接的混合自动重传请求反馈信息确定用于向所述连接发送数据 的子载波集。
7、 如权利要求 6所述的抑制同频干扰的方法, 其中所述根据所述信道 质量和所述连接的连接类型及所述连接的混合自动重传请求反馈信息确定 用于向所述连接发送数据的子载波集包括:
根据所述信道质量确定的子载波集与根据所述连接的连接类型及所述 连接的混合自动重传请求反馈信息确定的子载波集相同, 则釆用所述子载 波集发送数据。
8、 如权利要求 7所述的抑制同频干扰的方法, 其中所述确定用于发送 数据的子载波集后, 该方法还包括:
确定使用所述子载波集发送数据是否满足服务质量指标, 使用所述子 载波集发送数据满足服务质量指标, 则釆用所述子载波集发送数据。
9、 一种抑制同频干扰的装置, 该装置包括: 确定模块、 判决模块; 其 中,
所述确定模块, 设置为根据混合自动重传请求的反馈信息确定该混合 自动重传请求对应连接的连接类型;
所述判决模块, 设置为根据所述连接的连接类型和所述连接的混合自 动重传请求反馈信息确定用于向所述连接发送数据的子载波集。
10、 如权利要求 9所述的抑制同频干扰的装置, 该装置还包括: 信道 质量判决和终决模块; 其中,
所述信道质量判决模块, 设置为根据信道质量确定用于发送数据的子 载波集;
所述终决模块, 设置为判断所述判决模块确定的子载波集与所述信道 质量判决模块确定的子载波集是否相同, 若相同, 所述终决模块还判断釆 用所述子载波集发送数据是否满足服务质量指标, 若满足, 则釆用所述子 载波集发送数据。
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