WO2014075240A1 - 信息发送方法、基站和网络*** - Google Patents

信息发送方法、基站和网络*** Download PDF

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Publication number
WO2014075240A1
WO2014075240A1 PCT/CN2012/084592 CN2012084592W WO2014075240A1 WO 2014075240 A1 WO2014075240 A1 WO 2014075240A1 CN 2012084592 W CN2012084592 W CN 2012084592W WO 2014075240 A1 WO2014075240 A1 WO 2014075240A1
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WO
WIPO (PCT)
Prior art keywords
signal
value
base station
soft
hard
Prior art date
Application number
PCT/CN2012/084592
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English (en)
French (fr)
Inventor
罗霄军
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2012/084592 priority Critical patent/WO2014075240A1/zh
Priority to CN201280003017.1A priority patent/CN104054374A/zh
Publication of WO2014075240A1 publication Critical patent/WO2014075240A1/zh

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Classifications

    • 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
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0882—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using post-detection diversity
    • H04B7/0885—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using post-detection diversity with combination
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink

Definitions

  • the present invention relates to a wireless communication technology, and in particular, to an information transmission method, a base station, and a network system. Background technique
  • Soft Hand-off refers to channel switching between cells when the carrier frequency of the pilot channel is the same.
  • the mobile station maintains the communication link with the original base station and the new base station at the same time. Only when the mobile station establishes stable untrusted communication with the new base station, the connection with the original base station is disconnected, and the soft handover can effectively improve the cell. The reliability of the switch.
  • a typical soft handoff is to perform multi-cell information combining, that is, soft combining, by directly transmitting signal softness values or signal hard values between base stations.
  • the embodiments of the present invention provide a method for transmitting information, a base station, and a network system, in view of the deficiencies of the prior art.
  • An embodiment of the present invention provides an information sending method, including:
  • the first base station acquires quality indication information for indicating reliability of the first uplink signal according to the first uplink signal, the signal softness value, or the signal hard value; If the first base station determines that the quality indication information is higher than a preset threshold, the first base station sends the signal softness value or the signal hard value to the second base station, where the second base station is configured according to the second base station.
  • the signal softness values are soft combined or selectively combined according to the hard values.
  • the method as described above further includes: if the first base station determines that the quality indication information is not higher than a preset threshold by determining, the first base station does not send the signal softness value to the second base station or the Signal hard value.
  • the method as described above further includes: adjusting the preset threshold value in real time according to actual traffic.
  • Another aspect of the embodiment of the present invention further provides a base station, including:
  • a receiving module configured to receive a first uplink signal sent by the mobile station, and acquire a signal softness value or a signal hard value corresponding to the first uplink signal
  • An acquiring module configured to receive the first uplink signal, the signal softness value, or the signal hard value sent by the receiving module, and according to the first uplink signal, the signal softness value or The signal hard value acquires quality indication information used to indicate reliability of the first uplink signal;
  • the processing module is configured to receive the quality indication information sent by the acquiring module, and if it is determined by the judgment that the quality indication information is higher than a preset threshold, send the signal softness value or the location to the second base station
  • the signal hard value is used by the second base station to perform soft combining according to the signal softness value or to perform selective combining according to the hard value.
  • the processing module is further configured to: if the quality indication information is not higher than a preset threshold by determining, the signal softness value or the signal is not sent to the second base station Hard value.
  • the base station further includes: a storage module, configured to store the preset threshold.
  • a further embodiment of the present invention provides a base station, including a processor and a memory, where: the processor is configured to receive a first uplink signal sent by a mobile station, and acquire a signal soft quantity corresponding to the first uplink signal. a value or a signal hard value; obtaining, according to the first uplink signal, the signal softness value or the signal hard value, quality indication information indicating reliability of the first uplink signal; Transmitting the signal softness value or the signal hard value to the second base station, where the quality indication information is higher than the preset threshold, for the second base station to perform soft combining according to the signal softness value. Or performing selective combining according to the hard value;
  • the memory is configured to store the preset threshold.
  • a further aspect of the embodiments of the present invention further provides a network system, including a first base station and a second base station. And the mobile station, the mobile station moves in an overlapping area of the coverage area of the first cell corresponding to the first base station and the second cell corresponding to the second base station; wherein, the first base station uses the foregoing Base station.
  • FIG. 1 is a schematic flowchart of an embodiment of an information sending method according to the present invention
  • FIG. 2 is a schematic diagram of an application of an embodiment of an information transmission method in a CRAN according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of an application of an information transmission method according to an embodiment of the present invention in a HetNet
  • FIG. 3 is a schematic diagram of an application of an information transmission method according to an embodiment of the present invention in a HetNet
  • FIG. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention. detailed description
  • the embodiment of the present invention provides a solution that is a base station.
  • a base station Before transmitting, for example, a signal softness value to another base station, first acquiring quality indication information corresponding to the uplink signal sent by the mobile station for indicating the reliability of the uplink signal, and then using the quality indication information with a previously preset threshold The value is compared. If the quality indication information meets the threshold requirement, the signal softness value is sent to another base station according to the processing flow of the prior art; if the requirement is not met, the signal softness value is not sent, thereby solving the problem.
  • the small interval carries out a large amount of traffic problems caused by the softness of the signal.
  • FIG. 1 is a schematic flowchart of an embodiment of an information sending method according to the present invention. As shown in FIG. 1, the method includes:
  • Step 100 The first base station receives the first uplink signal sent by the mobile station, and acquires a signal softness value or a signal hard value corresponding to the first uplink signal.
  • the mobile station is corresponding to the first cell and the second base station corresponding to the first base station.
  • the cell handover is performed because the mobile station is at the cell edge.
  • the mobile station switches from the first cell to the second cell as an example.
  • the mobile station When the mobile station moves into the overlapping area of the first cell and the second cell, since the signal strength of the first cell decreases, in order to ensure the normal communication service of the mobile station, the mobile station is switched from the first cell to the second cell.
  • the mobile station sends an uplink signal, and the first base station and the second base station receive the uplink signal of the mobile station at the same time.
  • the uplink signal received by the first base station is referred to as the first.
  • An uplink signal is referred to as a second uplink signal, and the first uplink signal and the second uplink signal may be different due to a difference in uplink coverage between the first station and the second base station.
  • the first base station may obtain a signal softness value or a signal hard value corresponding to the first uplink signal according to the first uplink signal.
  • the signal softness value described in this embodiment refers to a probability that the characterization information is a preset value, for example, a soft log likelihood ratio (LLR) information with information bits of +1 or -1 or a received signal and possible transmission.
  • the codebook is related to the magnitude of the match.
  • the hard value of the signal refers to the decoded information bits. Since the signal softness value or the signal hard value can represent the first uplink signal, the first base station can send the signal softness value or the signal hard value to the second base station for the second base station to perform in the subsequent processing procedure.
  • the multi-cell signal is combined to complete the soft handover of the cell.
  • Step 101 The first base station acquires quality indication information used to indicate reliability of the first uplink signal according to the first uplink signal, the signal softness value, or the signal hard value. After obtaining the corresponding signal softness value or signal hard value according to the first uplink signal, the quality indication information corresponding to the first uplink signal may be further calculated according to the signal softness value or the signal hard value.
  • the quality indication information is, for example, a signal to noise ratio (SNR) of the signal, a decoded parity bit, a noise threshold, etc., that is, it can represent the reliability of the first uplink signal.
  • SNR signal to noise ratio
  • the corresponding maximum score value and the second largest score value may be obtained as the signal softness value of the first uplink signal, and then the quality indication is obtained according to the difference between the maximum score value and the second largest score value.
  • Obtaining quality indication information according to the hard value of the signal for example, if the first uplink signal is encoded by TC (toubo code) ICC (convolution code), it may be based on a cyclic redundancy check (cyclic Redundancy check, CRC) gets quality indication information.
  • the quality indication information can be calculated according to the signal to noise ratio (SNR) of the first uplink signal.
  • SNR signal to noise ratio
  • Step 102 The first base station, if it is determined by the judgment that the quality indication information is higher than a preset threshold, sends the signal softness value or the signal hard value to the second base station, where The two base stations perform soft combining according to the signal softness value or perform selective combining according to the hard value.
  • the first base station may determine whether to send the signal softness value or the signal hard value corresponding to the first uplink signal to the second base station according to the quality indication information and the previously preset threshold value. Specifically, the first base station compares the quality indication information with the preset threshold. If the quality indication information is higher than the preset threshold, the first uplink signal is useful for soft handover, so the first base station will be A signal softness value or a signal hard value corresponding to an uplink signal is sent to the second base station. If the quality indication information is not higher than the preset threshold, the first uplink signal is useless for soft handover. Therefore, the first base station does not send the signal softness value or signal hard value corresponding to the first uplink signal to the second base station. This will save transmission resources to the utmost.
  • the preset threshold value may be obtained by a compromise between performance and traffic based on different quality indication information.
  • the CRC may be used as the quality indication information
  • the SNR may be used as the quality indication information
  • the different quality indication information may have different
  • the selection method can achieve a compromise between performance and traffic. The lower the threshold, the better the performance and the greater the traffic. At the same time, it can be adjusted in real time according to the actual flow of the system to obtain the maximum gain of the system capacity.
  • the signal softness value of all the received other cells can be directly combined with the signal softness value of the local cell.
  • the log likelihood ratio LLR is combined, or the signal hard values of all received other cells are selectively combined with the signal hard values of the local cell, for example, data coverage is directly performed according to the arrival time.
  • the processing method provided by the embodiment of the present invention can be applied to various fields, such as CRAN or HetNet.
  • FIG. 2 is a schematic diagram of application of an embodiment of an information sending method in CRAN according to the present invention.
  • CRAN uses the distributed BBU+RRU architecture.
  • the baseband BBU and the radio RRU in the base station are separated and extended.
  • One BBU can carry multiple radio unit RRUs, so that the baseband pool resources can be shared.
  • Distributed base stations can achieve greater capacity for centralized placement of BBUs. This brings convenience to adjacent multi-sector signal combining, and also brings huge data transmission traffic between cells.
  • the method provided by the embodiment of the present invention can well solve the problem of large data transmission traffic in the CRAN.
  • the quality indication information is calculated on the softness value of the signal in the local cell, and is determined in the BBU chip according to the quality indication information, and the quality indication information is not transmitted to other BBU chips when the quality indication information is lower than the preset threshold; Information above the preset threshold is passed to other BBU chips.
  • Other BBU chips perform multi-chip information merging.
  • the information sending method provided by the embodiment of the present invention can also be applied to anti-interference.
  • the first base station sends the signal softness value or the signal hard value corresponding to the uplink signal sent by the mobile station to the second base station
  • the second-level base station can calculate the mobile station to send according to the signal softness value or the signal hard value.
  • the first-up signal and accordingly, removes interference from the first uplink signal in the actually received uplink signal.
  • FIG. 3 is a schematic diagram of an application of the method for transmitting information according to the present invention in HetNet.
  • the uplink and downlink coverage is not symmetric.
  • the downlink coverage of the micro-station is smaller than the uplink coverage, which causes the user switching to the macro station to actually receive the superior uplink signal quality of the micro-station.
  • the method provided by the embodiment of the present invention can also be applied, and the problem of large data transmission traffic is well solved.
  • the soft handoff area of the system is first expanded, and the number of serving cells of the user is improved to obtain better signal quality. Then, the information transmission method provided by the embodiment of the present invention is used to reduce the transmission traffic.
  • data transmission traffic can be greatly reduced while acquiring most soft combining or selective combining gain between cells. It is also possible to maximize the gain of system capacity under the requirement of transmitting traffic between certain cells.
  • the embodiment of the present invention can be used not only for the receiver information combination but also for the receiver to generate the transmission control signal based on the received signal. Specifically, after the first receiver according to the calculated quality indication information, the first indicator can be based on the quality indication information.
  • the size determines whether the control signal for controlling the uplink signal transmission is sent to another receiver; the other receiver can combine the received control signal with the uplink transmission control signal generated by the receiver to generate a control signal to be transmitted downstream. .
  • multi-cell merging can also be performed based on the same method, and is not limited to the merging of two cells in the above embodiment.
  • the processing method provided by the foregoing embodiment the case where the mobile station moves in the overlapping area of the coverage area of the first cell and the second cell and performs the soft handover of the cell will be described as an example.
  • the processing method for limiting the traffic between the base stations provided by the embodiment of the present invention can also be applied to other occasions, such as the multi-point coordinated transmission and reception technology CoMP, and the like.
  • the base station includes a receiving module 41, an obtaining module 42 and a processing module 43.
  • the receiving module 41 is configured to receive a first uplink signal sent by the mobile station.
  • the obtaining module 42 is configured to receive the first uplink signal, the signal softness value or the location sent by the receiving module 41 a signal hard value, and obtaining quality indication information for indicating reliability of the first uplink signal according to the first uplink signal, the signal softness value or the signal hard value;
  • the processing module 43 is configured to receive Obtaining the quality indication information sent by the module 42, if it is determined by the judgment that the quality indication information is higher than a preset threshold, sending the signal softness value or the signal hard value to the second base station, for The second base station performs soft combining according to the signal softness value or performs selective combining according to the hard value.
  • the base station After receiving the first uplink signal sent by the mobile station, the base station obtains a corresponding signal softness value or signal hard value.
  • the obtaining module 42 obtains the quality indication information according to the first uplink signal, the signal softness value or the signal hard value, and then determines, by the processing module 43, that the signal softness value needs to be sent to other base stations according to the quality indication information and the preset threshold value. Or a signal hard value, if it is determined by the judgment that the quality indication information is higher than a preset threshold, sending the signal softness value or the signal hard value to other base stations, for the other base station according to the The signal softness values are soft combined or selectively combined according to the hard values.
  • the processing module 43 is further configured to: if the quality indication information is not higher than the preset threshold by the judgment, the signal softness value or the signal hard value is not sent to the second base station.
  • the base station provided by the embodiment of the present invention may further include a storage module 44, configured to store a preset threshold, and update the stored preset threshold.
  • FIG. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station includes a processor 51 and a memory 52, where the processor 51 is configured to receive a first uplink signal sent by the mobile station, and obtain the a signal softness value or a signal hard value corresponding to the first uplink signal; An uplink signal, the softness value of the signal, or the hard value of the signal, to obtain quality indication information for indicating reliability of the first uplink signal; if it is determined by the judgment that the quality indication information is higher than a preset threshold And transmitting, by the second base station, the signal softness value or the signal hard value, for the second base station to perform soft combining according to the signal softness value or performing selective combining according to the hard value
  • the memory 52 is configured to store the preset threshold.
  • the base station provided by the foregoing embodiment of the present invention can greatly reduce data transmission traffic while acquiring most soft combining or selective combining gain between cells. It is also possible to obtain the maximum gain of the system capacity under the requirement of transmitting traffic between certain cells.
  • the embodiment of the present invention further provides a network system, where the network system includes a first base station, a second base station, and a mobile station, where the mobile station corresponds to the first cell corresponding to the first base station and the second base station
  • the overlapping area within the coverage of the two cells moves.
  • the first base station may use the foregoing base station as shown in FIG. 4 or FIG. 5 .
  • the second base station is used for soft combining or selective combining to complete soft switching of the mobile station.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, i.e., may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a hardware plus software functional unit.
  • the above integrated unit implemented in the form of a software functional unit can be stored in a calculation
  • the machine can be read from the storage medium.
  • the software functional unit is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform the method of various embodiments of the present invention. Part of the steps.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program code. .

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

Abstract

本发明实施例提供一种信息发送方法、基站和网络***。通过获取接收信号的质量指示信息来判断是否需要转发信号软性量值或信号硬值，以供其他基站进行多小区信号的合并。本发明实施例可以在获取小区间大部分软合并或者选择性合并增益的同时，极大的减少数据传输流量；也可以在一定小区间传输流量的要求下，最大限度的获取***容量的增益。

Description

信息发送方法、 基站和网络*** 技术领域 本发明实施例涉及无线通信技术， 尤其涉及一种信息发送方法、 基站和 网络***。 背景技术
在移动通信***中， 当处于连接状态的移动台从一个小区移动到另一个 小区时， 为了保证通信不中断， 通信***通常会启动切换过程（即将与原服 务小区的连接译放， 并与新服务小区产生连接）来保证该移动台的业务传输。 其中， 软切换（ Soft Hand-off )是指在导频信道的载波频率相同时小区之间的 信道切换。 在切换过程中， 移动台与原基站和新基站同时保持通信链路， 只 有当移动台与新基站建立稳定的无信通信后， 才断开与原基站的联系， 软切 换可有效地提高小区切换的可靠性。 典型的软切换是在各基站之间通过直接 传输信号软性量值或信号硬值来完成多小区的信息合并即软合并。
由于软合并需要进行大量信号软性量值或信号硬值的传输， 特别是绿色 无线接入网 （CRAN )和异构网 （ Heterogeneous Network; 简称： HetNet )等 应用中， 处于软合并的用户比率越来越大， 此时通用公共无线接口 （The Common Public Radio Interface; 简称： CPRI ) 的传输带宽成为软切换的主要 限制； 如果做全规格的软合并， 必将大大增加成本。 发明内容
本发明实施例针对现有技术的缺陷， 提供一种信息发送方法、 基站和网 络***。
本发明实施例一方面提供一种信息发送方法， 包括：
第一基站接收移动台发送的第一上行信号， 并获取所述第一上行信号对 应的信号软性量值或信号硬值；
所述第一基站根据所述第一上行信号、 所述信号软性量值或所述信号硬 值， 获取用于表示所述第一上行信号可靠性的质量指示信息； 所述第一基站若通过判断获知所述质量指示信息高于预设门限值， 则向 第二基站发送所述信号软性量值或所述信号硬值， 以供所述第二基站根据所 述信号软性量值进行软合并或者根据所述硬值进行选择性合并。
如上所述的方法还包括： 所述第一基站若通过判断获知所述质量指示信 息不高于预设门限值 , 则不向所述第二基站发送所述信号软性量值或所述信 号硬值。
如上所述的方法还包括： 根据实际流量实时调整所述预设门限值。
本发明实施例另一方面还提供一种基站， 包括：
接收模块， 用于接收移动台发送的第一上行信号， 并获取所述第一上行 信号对应的信号软性量值或信号硬值；
获取模块， 用于接收所述接收模块发送的所述第一上行信号、 所述信号 软性量值或所述信号硬值， 并根据所述第一上行信号、 所述信号软性量值或 所述信号硬值获取用于表示所述第一上行信号可靠性的质量指示信息；
处理模块， 用于接收所述获取模块发送的所述质量指示信息， 若通过判 断获知所述质量指示信息高于预设门限值 , 则向第二基站发送所述信号软性 量值或所述信号硬值， 以供所述第二基站根据所述信号软性量值进行软合并 或者根据所述硬值进行选择性合并。
如上所述的基站， 处理模块还用于： 若通过判断获知所述质量指示信息 不高于预设门限值， 则不向所述第二基站发送所述信号软性量值或所述信号 硬值。
如上所述的基站， 还包括： 存储模块， 用于存储所述预设门限值。
本发明实施例又一方面还提供一种基站， 包括处理器和存储器， 其中： 所述处理器用于接收移动台发送的第一上行信号， 并获取所述第一上行 信号对应的信号软性量值或信号硬值； 根据所述第一上行信号、 所述信号软 性量值或所述信号硬值， 获取用于表示所述第一上行信号可靠性的质量指示 信息； 若通过判断获知所述质量指示信息高于预设门限值， 则向第二基站发 送所述信号软性量值或所述信号硬值， 以供所述第二基站根据所述信号软性 量值进行软合并或者根据所述硬值进行选择性合并；
存储器用于存储所述预设门限值。
本发明实施例再一方面还提供一种网络***， 包括第一基站、 第二基站 和移动台， 所述移动台在所述第一基站对应的第一小区和所述第二基站对应 的第二小区所覆盖范围的重叠区域内移动； 其中， 所述第一基站釆用上述的 基站。
本发明实施例提供的信息发送方法、 基站和网络***， 通过获取接收信 号的质量指示信息来判断是否需要转发信号软性量值或信号硬值， 以供其他 基站进行多小区信号的合并。 本发明实施例可以在获取小区间大部分软合并 或者选择性合并增益的同时， 极大的减少数据传输流量； 也可以在一定小区 间传输流量的要求下， 最大限度的获取***容量的增益。 附图说明 图 1为本发明信息发送方法实施例流程示意图；
图 2为本发明信息发送方法实施例在 CRAN中的应用示意图； 图 3为本发明信息发送方法实施例在 HetNet中的应用示意图； 图 4为本发明实施例提供的基站结构示意图；
图 5为本发明实施例提供的基站结构示意图。 具体实施方式
针对现有技术进行软切换的过程中， 基站之间转发的用于进行多小区合 并的信息例如信号软性量值导致流量过大等缺陷， 本发明实施例提供一种解 决方案即在一基站向另一基站发送例如信号软性量值之前， 首先获取移动台 发送的上行信号对应的用于表示所述上行信号可靠性的质量指示信息， 然后 将该质量指示信息与之前预设的门限值进行比较， 若质量指示信息满足门限 值要求则按照现有技术的处理流程将信号软性量值发送给另一基站； 若不满 足要求， 则不发送信号软性量值， 以此解决小区间进行大量的信号软性量值 带来的流量问题。
图 1为本发明信息发送方法实施例流程示意图， 如图 1所示， 该方法包 括：
步骤 100、 第一基站接收移动台发送的第一上行信号， 并获取所述第一 上行信号对应的信号软性量值或信号硬值；
本发明实施例中移动台在第一基站对应的第一小区和第二基站对应的第 二小区所覆盖范围的重叠区域内移动， 由于移动台处于小区边缘， 因此要发 生小区切换，本实施例中以移动台从第一小区切换到第二小区为例进行说明。
当移动台移动到第一小区和第二小区的重叠区域内时， 由于第一小区的 信号强度下降， 为了保证移动台正常的通信业务， 要将移动台从第一小区切 换第二小区中。 在进行软切换的过程中， 移动台会发送上行信号， 第一基站 和第二基站此时将同时接收到移动台的上行信号， 本实施例中将第一基站接 收到的上行信号称为第一上行信号， 将第二基站接收到的上行信号称为第二 上行信号， 由于第一级站和第二基站上行覆盖范围的差异， 因此第一上行信 号和第二上行信号可能会不同。
当第一基站接收到第一上行信号后， 便可以根据该第一上行信号获取该 第一上行信号所对应的信号软性量值或信号硬值。 本实施例中所述的信号软 性量值是指表征信息为预设值的概率， 例如信息比特为 +1或者 - 1的软对数 似然比 （LLR )信息或者接收信号与可能的发射码本相关匹配后的量值。 信 号硬值是指译码后的信息比特。 由于信号软性量值或信号硬值能够表征第一 上行信号， 因此在后续的处理流程中第一基站可以将信号软性量值或信号硬 值发送给第二基站， 以供第二基站进行多小区信号的合并处理， 完成小区的 软切换。
步骤 101、 所述第一基站根据所述第一上行信号、 所述信号软性量值或 所述信号硬值， 获取用于表示所述第一上行信号可靠性的质量指示信息； 第一基站在根据第一上行信号获得对应的信号软性量值或信号硬值后， 便可以根据信号软性量值或信号硬值进一步计算获得对应于第一上行信号的 质量指示信息。 所述的质量指示信息例如信号的信噪比（signal to noise ratio; 简称： SNR ) 、 译码后的校验位、 噪声门限等等， 即其能够表示第一上行信 号可靠性。
根据信号软性量值获得质量指示信息例如， 若第一上行信号釆用 RM
( Reed - Muller )编码， 则可以获取到对应的最大打分值和次大打分值作为 第一上行信号的信号软性量值， 然后再根据最大打分值和次大打分值的差值 得到质量指示信息。
根据信号硬值获得质量指示信息， 例如若第一上行信号釆用 TC ( toubo code ) ICC ( convolution code ) 编码， 则可以根据循环冗余校验 ( cyclic redundancy check , CRC )得到质量指示信息。
当然还可以直接根据第一上行信号本身获得质量指示信息， 例如可以根 据第一上行信号的信噪比（SNR )计算质量指示信息。
步骤 102、 所述第一基站若通过判断获知所述质量指示信息高于预设门 限值， 则向第二基站发送所述信号软性量值或所述信号硬值， 以供所述第二 基站根据所述信号软性量值进行软合并或者根据所述硬值进行选择性合并。
第一基站获取到质量指示信息后， 便可以根据质量指示信息和之前预设 的门限值决定是否将第一上行信号对应的信号软性量值或信号硬值发送给第 二基站。 具体地， 第一基站将质量指示信息和预设门限值进行比较， 若质量 指示信息高于预设门限值， 则说明第一上行信号对于软切换是有用的， 因此 第一基站将第一上行信号对应的信号软性量值或信号硬值发送给第二基站。 质量指示信息不高于预设门限值，则说明第一上行信号对于软切换是无用的， 因此第一基站不向第二基站发送第一上行信号对应的信号软性量值或信号硬 值， 这样可以最大限度节省传输资源。
所述的预设门限值可以基于不同质量指示信息通过性能与流量的折中获 得， 例如可以使用 CRC做质量指示信息， 可以使用 SNR做质量指示信息， 那么不同的质量指示信息可以有不同的选择方法， 可以在性能和流量中取得 折衷， 门限值越低， 性能越优， 流量越大。 同时也可以根据***的实际流量 实时地进行调整， 以获取***容量的最大增益。
第二基站若接收到第一级站发送的信号软性量值或信号硬值， 则可以直 接将所有收到的其它小区的信号软性量值与本小区的信号软性量值进行软合 并例如对数似然比 LLR合并， 或者将所有收到的其它小区的信号硬值与本小 区的信号硬值进行选择性合并， 例如直接根据到达时间进行数据覆盖。 本发 明实施例提供的处理方法， 可以应用到多个领域中， 例如 CRAN或 HetNet 中。
图 2为本发明信息发送方法实施例在 CRAN中的应用示意图。 随着移动 互联网、 物联网逐渐兴起， 无线网络中的数据流量迅速上升。 由于市场竟争 加剧， 运营商需要新的无线接入网演进方案来提升移动互联网时代自身的竟 争力， 这种具备 4C 特色， 即 Clean (节能减排） ， Centralized (集中处理） ， Cooperative (协作式无线电）和 Cloud (利用了云计算能力的软硬件平台）的 绿色无线接入网被称为 CRAN。 如图 2所示， CRAN釆用分布式 BBU+RRU 的架构， 基站中的基带 BBU和射频 RRU 实现了分离且拉远， 一个 BBU可 以带多个射频单元 RRU, 从而可以共享基带池资源。 分布式的基站可以实现 更大容量的 BBU 集中放置。 这样给相邻的多扇区信号合并带来了方便， 同 时也带来了小区间巨大的数据传输流量。
本发明实施例提供的方法便可以很好地解决 CRAN内的数据传输流量大 的问题。 具体地， 在本小区对信号软性量值计算质量指示信息， 根据质量指 示信息在本 BBU芯片内进行判断，质量指示信息低于预设门限值则不传给其 它 BBU芯片； 若质量指示信息高于预设门限值则传给其它 BBU芯片。 其它 BBU芯片进行多芯片信息合并。
本发明实施例提供的信息发送方法还可以应用于抗干扰。 具体地， 第一 基站将移动台发送的上行信号对应的信号软性量值或信号硬值发送给第二基 站， 第二级基站可以根据信号软性量值或信号硬值计算出移动台发送的第 ― 上行信号，并据此在实际接收到的上行信号中去除来自第一上行信号的干扰。
图 3为本发明信息发送方法实施例在 HetNet中的应用示意图，在 HetNet 组网场景下， 上下行的覆盖并不是对称的。 如图 3所示， 由于天线发射功率 的不一致， 微站的下行覆盖小于上行覆盖， 这会造成切换到宏站的用户实际 上微站接收的上行信号质量更优。 此时， 需要对在宏站将如图 3所示的 Non - SHO 区域加入软合并区， 并以最小的代价实现信号的软合并。 本发明实施 例提供的方法同样可以得以应用， 并很好地解决数据传输流量大的问题。
在例如 HetNet或者 CRAN网络架构下，先扩大***的软切换区，提高用 户的服务小区数目， 获得更好的信号质量； 然后再通过本发明实施例提供的 信息发送方法减少传输流量。 本发明实施例可以在获取小区间大部分软合并 或者选择性合并增益的同时， 极大的减少数据传输流量。 也可以在一定小区 间传输流量的要求下， 最大限度的获取***容量的增益。
本发明实施例不仅可以用于接收机信息合并， 还可以用于接收机基于接 收信号产生的发射控制信号， 具体地， 第一接收机根据计算出来的质量指示 信息后， 可以根据质量指示信息的大小决定是否将用于控制上行信号发送的 控制信号发送给另一个接收机； 另一个接收机可以根据接收到的控制信号和 本接收机产生的上行发射控制信号合并， 产生下行所要发送的控制信号。 另 夕卜， 还可以基于同样的方法进行多小区合并， 而不仅局限于上述实施例中的 两个小区的合并。
上述实施例提供的处理方法中， 以移动台在第一小区和第二小区所覆盖 范围的重叠区域内移动， 进行小区软切换的场合为例进行说明， 本领域技术 人员可以理解的是， 本发明实施例提供的能够限制基站间流量的处理方法， 还可以适用于其他场合， 例如多点协同传输接收技术 CoMP中， 等等。
图 4为本发明实施例提供的基站结构示意图， 如图 4所示， 该基站包括 接收模块 41、 获取模块 42和处理模块 43 , 其中， 接收模块 41用于接收移动 台发送的第一上行信号， 并获取所述第一上行信号对应的信号软性量值或信 号硬值； 获取模块 42用于接收所述接收模块 41发送的所述第一上行信号、 所述信号软性量值或所述信号硬值， 并根据所述第一上行信号、 所述信号软 性量值或所述信号硬值获取用于表示所述第一上行信号可靠性的质量指示信 息； 处理模块 43用于接收获取模块 42发送的所述质量指示信息， 若通过判 断获知所述质量指示信息高于预设门限值 , 则向第二基站发送所述信号软性 量值或所述信号硬值， 以供所述第二基站根据所述信号软性量值进行软合并 或者根据所述硬值进行选择性合并。
具体地，基站通过接收模块 41接收到移动台发送的第一上行信号后， 获 取对应的信号软性量值或信号硬值。 获取模块 42根据第一上行信号、信号软 性量值或信号硬值获取质量指示信息，然后通过处理模块 43根据质量指示信 息和预设门限值判断是需要向其他基站发送信号软性量值或信号硬值， 若通 过判断获知所述质量指示信息高于预设门限值， 则向其他基站发送所述信号 软性量值或所述信号硬值， 以供所述其他基站根据所述信号软性量值进行软 合并或者根据所述硬值进行选择性合并。处理模块 43还用于若通过判断获知 所述质量指示信息不高于预设门限值 , 则不向所述第二基站发送所述信号软 性量值或所述信号硬值。
进一步地， 本发明实施例提供的基站中还可以包括存储模块 44, 用来存 储预设门限值， 并更新所存储的预设门限值。
图 5为本发明实施例提供的基站结构示意图， 如图 5所示， 该基站包括 处理器 51和存储器 52, 其中， 处理器 51用于接收移动台发送的第一上行信 号， 并获取所述第一上行信号对应的信号软性量值或信号硬值； 根据所述第 一上行信号、 所述信号软性量值或所述信号硬值， 获取用于表示所述第一上 行信号可靠性的质量指示信息； 若通过判断获知所述质量指示信息高于预设 门限值， 则向第二基站发送所述信号软性量值或所述信号硬值， 以供所述第 二基站根据所述信号软性量值进行软合并或者根据所述硬值进行选择性合 并； 存储器 52用于存储所述预设门限值。
本发明上述实施例提供的基站， 可以在获取小区间大部分软合并或者选 择性合并增益的同时， 极大的减少数据传输流量。 也可以在一定小区间传输 流量的要求下， 最大限度的获取***容量的增益。
本发明实施例还提供一种网络***， 该网络***包括第一基站、 第二基 站和移动台， 所述移动台在所述第一基站对应的第一小区和所述第二基站对 应的第二小区所覆盖范围的重叠区域内移动。 其中， 第一基站可以釆用上述 如图 4或图 5所提供的基站，具体的结构和功能可以参见上述实施例的记载， 此处不再赘述。 第二基站用于进行软合并或者选择性合并， 完成移动台的软 切换。
在本发明所提供的几个实施例中，应该理解到，所揭露的装置和方法， 可以通过其它的方式实现。 例如， 以上所描述的装置实施例仅仅是示意性 的， 例如， 所述单元的划分， 仅仅为一种逻辑功能划分， 实际实现时可以 有另外的划分方式， 例如多个单元或组件可以结合或者可以集成到另一个 ***， 或一些特征可以忽略， 或不执行。 另一点， 所显示或讨论的相互之 间的耦合或直接耦合或通信连接可以是通过一些接口， 装置或单元的间接 耦合或通信连接， 可以是电性， 机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的， 作为单元显示的部件可以是或者也可以不是物理单元， 即可以位于一个地 方， 或者也可以分布到多个网络单元上。 可以根据实际的需要选择其中的 部分或者全部单元来实现本实施例方案的目的。
另外， 在本发明各个实施例中的各功能单元可以集成在一个处理单元 中， 也可以是各个单元单独物理存在， 也可以两个或两个以上单元集成在 一个单元中。 上述集成的单元既可以釆用硬件的形式实现， 也可以釆用硬 件加软件功能单元的形式实现。
上述以软件功能单元的形式实现的集成的单元， 可以存储在一个计算 机可读取存储介质中。 上述软件功能单元存储在一个存储介质中， 包括若 干指令用以使得一台计算机设备（可以是个人计算机， 服务器， 或者网络 设备等） 或处理器 （processor )执行本发明各个实施例所述方法的部分步 骤。 而前述的存储介质包括： U盘、 移动硬盘、 只读存储器 （Read-Only Memory, ROM ) 、 随机存取存储器 ( Random Access Memory, RAM ) 、 磁碟或者光盘等各种可以存储程序代码的介质。
本领域技术人员可以清楚地了解到， 为描述的方便和简洁， 仅以上述 各功能模块的划分进行举例说明， 实际应用中， 可以根据需要而将上述功 能分配由不同的功能模块完成， 即将装置的内部结构划分成不同的功能模 块， 以完成以上描述的全部或者部分功能。 上述描述的装置的具体工作过 程， 可以参考前述方法实施例中的对应过程， 在此不再赘述。
最后应说明的是： 以上各实施例仅用以说明本发明的技术方案， 而非对 其限制； 尽管参照前述各实施例对本发明进行了详细的说明， 本领域的普通 技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改， 或者对其中部分或者全部技术特征进行等同替换； 而这些修改或者替换， 并 不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims

权 利 要 求 书
1、 一种信息发送方法， 其特征在于， 包括：
第一基站接收移动台发送的第一上行信号， 并获取所述第一上行信号对 应的信号软性量值或信号硬值；
所述第一基站根据所述第一上行信号、 所述信号软性量值或所述信号硬 值， 获取用于表示所述第一上行信号可靠性的质量指示信息； 所述第一基站 若通过判断获知所述质量指示信息高于预设门限值 , 则向第二基站发送所述 信号软性量值或所述信号硬值， 以供所述第二基站根据所述信号软性量值进 行软合并或者根据所述硬值进行选择性合并。
2、 根据权利要求 1所述的方法， 其特征在于， 所述方法还包括： 所述第一基站若通过判断获知所述质量指示信息不高于预设门限值， 则 不向所述第二基站发送所述信号软性量值或所述信号硬值。
3、 根据权利要求 1或 2所述的方法， 其特征在于， 所述方法还包括： 根据实际流量实时调整所述预设门限值。
4、 一种基站， 其特征在于， 包括：
接收模块， 用于接收移动台发送的第一上行信号， 并获取所述第一上行 信号对应的信号软性量值或信号硬值；
获取模块， 用于接收所述接收模块发送的所述第一上行信号、 所述信号 软性量值或所述信号硬值， 并根据所述第一上行信号、 所述信号软性量值或 所述信号硬值获取用于表示所述第一上行信号可靠性的质量指示信息；
处理模块， 用于接收所述获取模块发送的所述质量指示信息， 若通过判 断获知所述质量指示信息高于预设门限值 , 则向第二基站发送所述信号软性 量值或所述信号硬值， 以供所述第二基站根据所述信号软性量值进行软合并 或者根据所述硬值进行选择性合并。
5、 根据权利要求 4所述的基站， 其特征在于， 所述处理模块还用于： 若通过判断获知所述质量指示信息不高于预设门限值， 则不向所述第二 基站发送所述信号软性量值或所述信号硬值。
6、 根据权利要求 4或 5所述的基站， 其特征在于， 还包括：
存储模块， 用于存储所述预设门限值。
7、 一种基站， 其特征在于， 包括处理器和存储器， 其中： 所述处理器用于接收移动台发送的第一上行信号， 并获取所述第一上行 信号对应的信号软性量值或信号硬值； 根据所述第一上行信号、 所述信号软 性量值或所述信号硬值， 获取用于表示所述第一上行信号可靠性的质量指示 信息； 若通过判断获知所述质量指示信息高于预设门限值， 则向第二基站发 送所述信号软性量值或所述信号硬值， 以供所述第二基站根据所述信号软性 量值进行软合并或者根据所述硬值进行选择性合并；
所述存储器用于存储所述预设门限值。
8、 一种网络***， 包括第一基站、 第二基站和移动台， 所述移动台在所 述第一基站对应的第一小区和所述第二基站对应的第二小区所覆盖范围的重 叠区域内移动； 其特征在于， 所述第一基站釆用如权利要求 4-7任一所述的 基站。
PCT/CN2012/084592 2012-11-14 2012-11-14 信息发送方法、基站和网络*** WO2014075240A1 (zh)

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