CN100375575C - Measurement control method for switching between mobile communication cells - Google Patents

Measurement control method for switching between mobile communication cells Download PDF

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CN100375575C
CN100375575C CN 200510000473 CN200510000473A CN100375575C CN 100375575 C CN100375575 C CN 100375575C CN 200510000473 CN200510000473 CN 200510000473 CN 200510000473 A CN200510000473 A CN 200510000473A CN 100375575 C CN100375575 C CN 100375575C
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measurement
frequency
ue
carrier
load
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CN1805592A (en
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曹增峰
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大唐移动通信设备有限公司
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Abstract

本发明是移动通信小区切换的测量控制方法,在保证用户链路质量和用户设备UE测量小区个数最少的条件下仍能对所有邻小区有选择地进行同频、异频切换,并在多个载波间灵活地均衡小区间负荷。 The present invention is a cell measurement control method in mobile communication handover, still for all neighboring cells are selectively performed at the same frequency guarantee a minimum number of users and the user equipment UE link quality measurement cell conditions, inter-frequency handover, and a multi- between the carrier flexibly inter-cell load balancing. 包括:无线网络控制器RNC接收来自UE的测量报告,并按为UE配置的测量控制信息组织上报;在UE上报1G/1D/2A事件时,RNC从1G/1D/2A事件提供的同频或异频目标小区中根据导频信号测量信息生成切换目标小区;在UE上报链路恶化事件时,附带若干距离该UE最近基站上同频与/或异频小区的路径损耗测量报告值,RNC根据该若干路径损耗测量报告值和其对应的若干基站上载波的负荷确定负荷均衡的切换目标基站及切换目标小区对应的载波。 Comprising: a radio network controller RNC receives the measurement report from the UE, control information organization press configured for the UE measurement reporting; the same reporting 1G / 1D / 2A event when the UE, RNC from the 1G / 1D / 2A or event frequency provided inter-frequency cell in the target measurement information based on the pilot signal generating handover target cell; when the UE reports event link deteriorated, the UE comes from a number of the nearest base station on the same frequency and / or inter-frequency cell path loss measurement report values, RNC according to the load on the plurality of path loss measurement reports several base stations and their corresponding values ​​determined load balancing carrier handover target base station and the handover target cell corresponding to the carrier.

Description

移动通信小区切换的测量控制方法技术领域本发明涉及移动通信技术,是一种用于移动通信小区切换、获取目标小区信息的测量控制方法。 TECHNICAL FIELD The measurement control handover of the mobile communication cell of the present invention relates to mobile communication technology, a mobile communication switching cell, a target cell acquires the measurement control information. 背景技术码分多址(CDMA)系统是自干扰受限系统,其干扰主要包括小区内干扰及小区间干扰。 BACKGROUND OF THE INVENTION Code Division Multiple Access (CDMA) system is self-interference limited system, which includes the interference and inter-cell interference inside the cell interference. 小区内干扰主要是自身符号间千扰以及多址千扰,小区间千4尤包括同频邻小区干扰和相邻载波的邻小区(异频邻小区)干扰。 Intra-cell interference is mainly one thousand interference between own symbols and multiple access interference one thousand, one thousand four inter-cell co-frequency adjacent cells include in particular interference and the adjacent carriers adjacent cells (inter-frequency neighboring cell) interference. 虽然同频组网是3G 网络扩容的基础,但因为同频组网时,体现在小区间干扰上比异频组网时大, ^v而影响同频组网容量。 Although the same frequency networking is the basis of 3G network expansion, but because the same time-frequency network, reflected in the large inter-cell interference when the different frequency than the network, ^ v affect the capacity of the same frequency networking. 如图1所示的同频小区间切换时的小区间干扰:用户终端(UE)分别处在小区边缘的A、 B、 C三个位置,其运动轨迹如图中虛线ac一b,运动中用户会进行同频切换操作,小区间干扰在D点附近变得很大。 Inter-cell interference when switching between intra-frequency cells shown in Figure 1: a user terminal (UE) in the cell edge, respectively A, B, C three positions, its trajectory shown in phantom in an ac B, movement the user will perform the same operation frequency handover, an inter-cell interference becomes large in the vicinity of the point D. 在小区硬切换方案中,如果硬切换的目标邻小区与服务小区使用相同的频率(即同频切换),则在用户从服务小区边缘向邻小区运动过程中,用户接收服务小区的信号强度逐渐变小,但同频干扰却不会变小,甚至会增大, 导致用户链路质量(Ec/Io)快速恶化。 In cell hard handover scheme, if the hard handover target neighboring cell and the serving cell using the same frequency (i.e., the same frequency handover), then the user's signal strength of the serving cell from the serving cell edge neighbor cells during exercise, the user receives the gradually becomes smaller, but not co-channel interference becomes small, even increases, causing the user a link quality (Ec / Io) rapid deterioration. 又由于硬切换方案中,供终端进行切换的时间很短,恶化的用户链路质量使终端极易掉话(而在软切换方案中, 情况则完全不同,软切换手机可将服务小区与目标小区的两路信号合并,产生较好的Ec/Io,从而保证在切换过程中,能平稳地进行通话)。 Also, because the hard handover scheme, the time for handover of the terminal is very short, so that the user of the terminal link quality deterioration easily dropped calls (in soft handoff scenario, the situation is completely different, soft handoff may be a mobile phone serving cell and the target two signals merged cell, resulting in better Ec / Io, to ensure that during the handover, the call can be performed smoothly). 相对而言,在硬切换时采用不同频率(异频切换),效杲会明显改善。 In contrast, different frequencies (inter-frequency handover) during a hard handover, Gao efficiency will be significantly improved. 即在服务小区与目标小区的边界处使用不同频率,可大大提高硬切换的成功率,而且对原有的网络影响小,无需对现网进行调整,容易在现有网络中加以实施,优化简便。 I.e., at the boundary of the serving cell using the target cell with the different frequency, can greatly improve the success rate of the hard handover, and little impact on the existing network, the existing network does not need to be adjusted, easily be implemented in an existing network, optimization is simple . 据统计,在比较理想的情况下,不同频率系统间硬切换成功率可达95%,而同频系统间硬切换的切换成功率一般在50-70 %之间。 According to statistics, in the ideal case, the system hard handover between different frequencies up to 95% success rate, handover success rate and with inter-frequency hard handover system is generally between 50-70%. 这是因为小区同频组网时的小区间干扰比小区异频组网时的小区间干扰大,而导致同频石更切换成功率低于异频硬切换。 This is because when the inter-cell co-channel interference networking large inter-cell interference than a cell at different frequency networking, resulting in intra-frequency handover success rate is lower than the stone more inter-frequency hard handover. 切换过程需要UE及时上报所测量的小区导频信号强度。 UE handover procedure needs to be promptly reported to the measured conductivity cell pilot signal strength. 小区导频信号强度测量值能够反映导频信号的路径损耗(路径损耗反映了无线信道对无线信号的慢衰落影响)。 Cell pilot signal strength measurements can reflect pilot signal path loss (path loss reflects slower radio channel radio signal fading). 为了尽可能地减少不必要的小区切换次数,系统会要求终端切换到路径损^^最小所对应的小区。 To minimize the number of unnecessary cell switch, the system will ask the terminal to switch the path loss corresponding to the smallest cell ^^. 慢衰落影响可采用相关对数正态分布产生,标准差。 Slow fading may be employed to generate the relevant log-normal distribution, standard deviation. =6. 0。 = 6.0. 平均路径损辆< 采用cost231—hata模型,则平均路径损耗公式如下:丄(小46.3 + 33.91og/-13.821og/^-"(/J+(44,9-6.551og/Jlog"CM .式中,f为载波频率;d为终端与基站间的距离;/^为基站高度;&为终端高度;c^为路径损耗指数;aW=(ul°g/—Q'7H561°g/—a8)。终端测量路径损耗的公式为:路径损耗(dB)=导频信号发射功率-接收导频信号强度其中的导频信号发射功率由同频或异频小区信息中信息单元(IE)— "Primary CCPCH Tx Power" (TDD模式)/ "Primary CPICH Tx power " (FDD模式) 给出,单位为dBm,无线网络控制器(RNC: Radio Network Controler )会通过测量消息告诉终端其所有邻小区的导频信号发射功率。 接收导频信号强度的单位为dBm。通过上述分析可知,当同频小区间干扰较大时,终端(UE)进行同频硬切换的成功率不高;此时终端若进行异频硬切换,则可以提高切换成功率。为此, 终端进行小区切 The average path loss vehicles <cost231-hata model employed, the average path loss equation as follows: Shang (small 46.3 + 33.91og / -13.821og / ^ - "(/ J + (44,9-6.551og / Jlog" CM formula , f is the carrier frequency; d is the distance between the terminal and the base station; / ^ is the height of the base station; height & terminal; C ^ path loss exponent; aW = (ul ° g / -Q'7H561 ° g / -a8) the terminal measurement path loss formula: path loss (dB) = pilot signal transmission power - receiving pilot signal strength wherein the pilot signal transmit power by the same or different frequency cell information in the information element (IE) - "Primary CCPCH Tx Power "(TDD mode) /" Primary CPICH Tx power "(FDD mode) are given in units of dBm, a radio network controller (RNC: radio network Controler) tells the terminal that all neighboring cells by measuring the pilot message the signal transmitting unit received pilot power of the pilot signal strength in dBm by the above analysis, when large interference with the inter-frequency cell, terminal (UE) for the same frequency hard handover success rate is not high; At this time, if the terminal XOR frequency hard handover, the handover success rate can be increased. for this reason, the terminal performs cell cut 换时,通常需要同时进行同频测量和异频测量,RNC根据终端上报的测量结果决定采用同频切换还是异频切换甚至负荷切换,其中的负荷切换是根据相邻小区负荷情况决定切换的目标小区。 When changing, usually need to be measured with the frequency and inter-frequency measurement, the RNC handover decided to use the same frequency handoff or inter-frequency handover measurement result even load reported by the terminal, wherein the load is determined handover target neighboring cell handover according to load condition district.

根据协议规范要求,时分双工(TDD)系统,终端最多测量的邻小区个数,包括:32个TDD同频小区(含服务小区);32个异频小区(包括分布在最多三个TDD载波上的TDD小区及分布在最多三个FDD载波上的FDD小区,如果终端具有此能力的话);32个RAT GSM小区(如果终端具有此能力的话)。 The protocol specification requirements, time division duplex (TDD) system, a maximum number of neighbor cells measured by the terminal, comprising: co-frequency TDD cell 32 (including the serving cell); 32 inter-frequency cells (including the distribution of at most three TDD carrier TDD cells distributed on and on up to three carriers FDD FDD cell, the terminal has this capability if any); 32 RAT GSM cell (the terminal if it has this capability). 频分双工(FDD)系统,终端最多测量的邻小区个数,包括:32个FDD同频小区(含服务小区);32个异频小区(包括分布在最多两个FDD载波上的FDD 小区及分布在最多三个TDD载波上的TDD小区,如果终端具有此能力的话);在IPDL ( Idle Periods in DownLink)间隔内能够监测16个同频小区(如果终端具有此能力的话)。 Frequency division duplex (FDD) system, a maximum number of neighbor cells measured by the terminal, comprising: FDD 32 intra-frequency cells (including the serving cell); 32 inter-frequency cells (including over a maximum of two carriers FDD FDD cell and TDD cells distributed on up to three carrier TDD, if the terminal has this capability it); in the IPDL (Idle Periods in DownLink) spacer 16 can monitor intra-frequency cells (the terminal if it has this capability). 因此,无论是TDD终端还是FDD终端,其测量异频载波的邻小区个数均受到限制。 Thus, either FDD or TDD terminal terminal, the number of inter-frequency neighbor cell measurement carriers are restricted. 载波的能力,则终端会无法测量所有存在的TDD与/或FDD异频小区;而目前终端进行小区切换时均利用终端测量并上^^艮的邻小区测量信息(其中包括终端测量的路径损耗信息)生成目标切换小区,因此可供终端切换的目标小区范围会受到很大限制,即无法充分利用系统的已有资源。 Carrier capabilities, the terminal may not measure all the existing TDD and / or FDD inter-frequency cell; and utilize the terminal and the measured neighbor cells when ^^ Gen current terminal performs cell handover measurement information (including path loss measured by the terminal information) generating a target handover cell, and therefore the terminal for handover target cell range will be greatly restricted, i.e. not make full use of existing resources of the system. 如果相邻基站支持的载波个数没有超出协议规范要求,则终端能够测量所有邻小区。 If the number of carriers supported by the neighboring base stations does not exceed the protocol specification requirements, the terminal is able to measure all neighboring cells. 当终端利用一般测量控制方法进行切换时,终端测量的小区个数会很多,每次测量完所有邻小区的时间也很长,这使得终端无法及时上报邻小区测量信息,从而降低小区切换的成功率。 When the terminal is switched by a general measurement control method, the terminal measures the number of cells will be a lot, all neighboring cells After each measurement time is very long, which makes the terminal can not timely reporting neighbor cell measurement information, thus reducing the success of cell handover rate. 综上所述,目前的小区切换测量控制方法不仅复杂且不实用,常常由于受到终端能力限制而无法灵活有效地均衡小区间负荷。 In summary, the current switching cell measurement control method is complicated and impractical often due to terminal capability can not be flexibly and effectively limit the inter-cell load balancing. 发明内容本发明的目的是设计一种移动通信小区切换的测量控制方法,终端在测量小区个数最少的条件下仍然能够对所有邻小区有选择地进行同频切换、异频切换,且能提高切换成功率;并能在多个载波(栽波个数不受限制)间灵活地均 Object of the present invention is to devise a measurement control method of cell switching a mobile communication terminal in a minimum number of cells measured under conditions still can be selectively performed for all neighboring cells with the frequency handover, inter-frequency handover, can improve the handover success rate; and the flexibility to average between a plurality of carriers (the number of waves is not limited to plant)

衡小区间负荷;同时,本发明还能保证用户的链路质量。 Inter-cell load value; Meanwhile, the present invention can also ensure that the link quality of the user. 实现本发明目的的技术方案是: 一种移动通信小区切换的测量控制方法, 无线网络控制器RNC接收来自用户设备UE的测量报告,该测量报告按RNC为UE配置的测量控制信息组织并上报;还包括:A. 在UE上才艮链路恶化事件报告的同时,还附带若干个距离该UE最近基站上同频与/或异频小区的路径损耗测量报告值,并执行步骤B;在UE上报1G/1D/2A事件报告时,执行步骤C;B. MC根据该若干个路径损耗测量报告值和与其对应的若干基站上载波的负荷确定负荷均衡的切换目标基站及切换目标小区对应的载波;C. RNC从UE的1G/1D/2A事件提供的同频或异频目标小区中,根据导频信号测量信息生成切换目标小区。 This object is achieved technical solution: a mobile communication control method of a measuring cell handover, the radio network controller RNC receives the measurement report from the user equipment UE, the measurement report by the UE measurement configuration RNC control information organization and reported; further comprising: a link Gen deterioration was reported events on the UE at the same time, also with a number of the UE from the nearest base station with the same frequency / inter-frequency cell or the path loss measurement report values, and step B; the UE. when reporting 1G / 1D / 2A event report, step C;. B MC determines the load balancing handover target base station and the handover target cell corresponding to the carriers according to a load on a plurality of base stations of the plurality of path loss measurement reported values ​​and corresponding carrier ;. C from the same RNC 1G / 1D / 2A supplied UE event or different frequency in the target cell, the pilot signal measurement information generated based on the handover target cell. 其中,RNC为UE配置测量控制信息,包括:a. 在UE同频测量消息中设置1G/1D事件测量配置信息;b. 在UE异频测量消息中设置2A事件测量配置信息,并在该UE异频测量消息的附加测量信息中附加同频测量消息的测量ID;c. 在UE测量消息中设置链路恶化事件对应的测量配置信息,并在该UE 测量消息的附加测量信息中附加同频测量消息及异频测量消息的测量ID。 Wherein, the RNC configures the UE measurement control information, comprising: a intra-frequency measurement in the UE message provided 1G / 1D event measurement configuration information; B disposed 2A event measurement configuration information in the UE inter-frequency measurement message, and the UE.. additional inter-frequency measurement information measurement message with additional pilot measurement message ID;. c disposed deterioration event link information corresponding to the measurement configuration message, the UE measurement, and an additional intra-frequency measurement information measured in the additional message in the UE measurement messages and measurement of inter-frequency measurement message ID. 其中,RNC将所述测量控制信息按所述a — b一c的顺序组织并发送给UE; 在所述步骤a的同频测量配置与步骤b的异频测量配置中,要求UE只测量每个相邻基站支持的一个载波。 Wherein, the measurement control information to the RNC according to the a - b a c organized sequentially sends the UE; frequency measurements in step a and the step b with the configuration of inter-frequency measurement configuration, each UE is required to measure only neighboring base station supports a carrier. 所述步骤A中,在所述的若干个距离UE最近基站上同频与/或异频小区的路径损耗测量报告值,是所述UE通过测量系统所要求的相邻基站上的一个同频载波或一个异频栽波,所得到的至多三个同频与/或异频小区的最小路径损耗值; 所述步骤B中,确定负荷均衡的切换目标基站及切换目标小区对应的载波进一步包括:Bl. RNC将得到的至多三个路径损耗测量报告值中最小的路径损耗测量报告值对应的基站确定为切换目标基站;B2.计算该切换目标基站上每个栽波的负荷,并按大小进行排序; B3.将负荷最小的栽波作为所述的切换目标小区对应的载波。 Said step A, the UE from the plurality of base stations on the same frequency with the nearest / or inter-frequency cell measurement report pathloss value is the same frequency on a UE by measuring neighboring base station required by the system a plant or inter-frequency carrier wave, the frequency obtained with up to three and / or a minimum path loss value different frequency cell; in the step B, the load balancing is determined handover target base station and the handover target cell corresponding to the carrier further comprises .: Bl path loss measurement report up to three values ​​obtained RNC smallest path loss measurement report corresponding to the value determined as the handover target base station; B2 calculation load on each of the wave planted handover target base station, the size press. sort;. B3 the smallest load as the plant wave corresponding to the handover target cell carriers. 所述步骤B2中,切换目标基站上每个载波的负荷,是按与该切换目标基站 Said step B2, the load of each carrier handover target base station, a handover target base station according to the

上载波相同并包括该切换目标基站的距离UE最近的至多三个基站上载波负荷之和计算得到的,该距离UE最近的至多三个基站是链路质量恶化时附加上报的同频与/或异频邻小区路径损耗测量值所一一对应的基站。 On a carrier and comprising the same distance to the handover target base station UE on up to three nearest base station calculates the sum of the load carriers obtained, the latest UE from the base station up to three additional deterioration of the link quality is reported by the same frequency and / or inter-frequency neighbor cell base station measures the path loss values ​​one to one. 所迷基站上每个载波的负荷由RNC周期性计算,包括:如果所述UE工作在时分双工模式,上、下行栽波相同,当所使用的上行与下行码资源均不跨时隙时,计算的载波负荷是基站上该载波的最小时隙负荷值;当所使用的上行与下行码资源跨时隙时,计算的载波负荷是基站上该载波的时隙负荷平均值;如果所述UE工作在频分双工模式,区分上行/下行载波计算所述的载波负荷,上行载波负荷是上行栽波对应的栽波负荷,下行栽波负荷是下行载波对应的载波负荷;所述步骤B3中,将负荷最小的上行与下行载波分别作为所述切换目标小区对应的上行与下行载波。 The load on each carrier is calculated by the RNC periodically fan base, comprising: if the UE operates in a time division duplex mode, the same downlink planted wave, when the uplink and downlink code resources are not used by cross slots, carrier load calculation is a minimum value of the carrier slots on the loading station; when the uplink and downlink code resources used in the cross-slot, time slot-carrier load calculation is the average value of the load carrier at the base station; if the UE operates in a frequency division duplex mode, to distinguish the uplink / downlink carrier of the carrier load is calculated uplink load carrier wave is planted planted wave corresponding to the uplink load, wave loads are planted downlink carrier corresponding to the downlink carrier load; step B3, the minimum load of the uplink and downlink carriers respectively corresponding to the handover target cell and the downlink carrier as the uplink. 本发明方法,RNC根据UE (终端)上报的距离其最近的若千个基站上同频与/或异频小区的路径损耗测量报告值(即RNC使用的若干个小区路径损耗测量值分别来自这若干个不同基站),及MC通过计算获取的负荷信息,即上述若干个基站各载波上的负荷大小,来生成同频或异频切换目标基站及切换目标小区对应的载波。 The method of the present invention, RNC according to the UE (terminal) reported from its nearest if or thousands of base stations with frequency and / or inter-frequency cell path loss measurement report value (i.e., a plurality of cell path loss measurements RNC used separately from these several different base stations), and calculates load information acquired by the MC, i.e., the magnitude of the load on each carrier said plurality of base stations to generate the same frequency or inter-frequency handover target base station and the handover target cell corresponding to the carrier. 该若干个的最大值为三个。 The maximum number is three. 本发明提出了一种保证链路质量的切换控制方法,即在链路质量好时做传统意义上的小区切换,在链路质量变差时做本发明的负荷均衡切换。 The present invention proposes a handover control method for ensuring the quality of the link, i.e., to make a cell handover in the traditional sense when the link quality is good, do load balancing handover of the present invention when the link quality deteriorates. 本发明提出的小区切换的测量控制方法,采用终端上报的距离其最近的若干个基站上同频与/或异频小区的路径损耗测量值来获取同频或异频切换的目标基站。 Cell handover measurement control method proposed by the present invention, a terminal which is reported from the same frequency and the recent several base stations / or inter-frequency cell path loss measurements to obtain the target base station inter-frequency or intra-frequency handover. RNC根据小区负荷信息与小区路径损耗测量值来确定负荷均衡切换的目标小区所对应的载波。 RNC determines a target cell load balancing switch corresponding to the carrier path loss measured value and the cell according to the cell load information. 其中在计算负荷时,对于工作在时分双工模式(TDD)的终端UE,需判断终端是否跨时隙,而其上行载波与下行载波相同。 Wherein in the calculation of the load, for working in a time division duplex mode terminal UE (TDD), the terminal determines whether the required cross-slots, while the same uplink carrier and a downlink carrier. 对于工作在频分双工模式的终端UE,需要区分小区的上、下行负荷,小区的上、下行负荷就是小区所对应的上、下行栽波的载波负荷。 For working in a frequency division duplex mode of the terminal the UE, need to distinguish cell, the downlink load, the downlink load of the cell is a cell corresponding to the carrier wave planted downlink load. 此处需要说明的是:小区的负荷信息可分为时隙负荷、载波负荷两种定义, 时隙负荷的定义比较多,如时隙接收总功率、时隙干扰功率、时隙信噪比、时隙数据业务吞吐量、时隙已占用码资源个数等。 It should be noted here: cell load information load can be divided into time slots, two definitions define the load carrier, the load more slots, such as the total power of the received slot, time slot interference power, SNR slot, slot data traffic throughput, and so the number of occupied time slot code resources. 本发明方法对时隙负荷定义不 The method of the present invention is defined not to load slots

做限制。 Do restrictions. 本发明对TDD模式终端的载波负荷的定义可以是:载波负荷是小区对应载波的上、下行所有时隙的时隙负荷平均值(即时隙负荷平均值)。 Definition of the load carrier TDD mode terminal of the present invention may be: a carrier corresponding to the load cell on the carrier is, downlink slot load average of all the time slots (time slots load average). 本发明对TDD模式终端的载波负荷的定义也可以是:小区对应载波的上行最小时隙负荷值与下行最小时隙负荷值的平均值(即最小时隙负荷值)。 Definition of the load carrier TDD mode terminal according to the present invention may be: an uplink carrier corresponding to the minimum cell load value of the downlink timeslot average value of the minimum load time slot (i.e., slot minimum load value). 根据协议规范要求,小区切换时,终端测量的小区个数及载波个数存在一个上限,即终端可能无法测量所有邻小区,而使提供切换的目标小区范围受到限制。 The protocol specifications, when switching the cell, the cell number and the number of carriers in the presence of a terminal measurement limit, i.e., the terminal may not measure all neighboring cells, the target cell to provide the limited range switching. 而本发明方法则没有这种限制,在只需测量每个相邻基站的一个载波的条件下,终端就可以对所有邻小区有选择地进行同频切换或异频切换,使测量小区的个数降低不少,相应的测量更及时、可靠,从而提高了终端的切换成功率,同时还能在个数不受限制的多个载波间灵活地均衡小区间的负荷,在保证切换的同时保证用户的链路质量。 The method of the present invention has no such limitation, measuring only one carrier in each of the neighboring base conditions, the terminal can be selectively performed with the frequency handover or an inter-frequency handover for all neighbor cells, the measurement of a cell many log reduction, the corresponding measurement is more timely, reliable, thereby improving the success rate of the handover of the terminal, while flexible load balancing between a plurality of cells between the number of carriers is not limited, to ensure handover while guaranteeing link quality of the user. 本发明用于3G无线通信网络系统,可适用于TDD与FDD两种模式。 The present invention is a 3G wireless communication network system is applicable to TDD and FDD modes. 附图说明图1是同频小区间切换时的小区间干扰示意图;图2是基于本发明测量控制方法的切换控制流程框图。 BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a co-channel inter-cell interference at an inter-cell handover schematic diagram; FIG. 2 is a block flow diagram of the switching control of the measurement control method based on the present invention. 具体实施方式本发明提出一种用于小区切换的测量控制方法,使UE在测量最少小区个数的条件下仍然能够对所有邻小区进行有选择地同频切换、异频切换,提高切换成功率;同时降低终端的测量压力,更及时可靠地更新终端的测量值,有利于及时准确地执行切换,还可以大大提高系统进行负荷均衡的灵活性。 DETAILED DESCRIPTION The present invention proposes a control method for measuring a cell handover the UE still can be measured selectively with the frequency handover, inter-frequency handover for all neighboring cells under minimal number of cell, handover success rate increases ; while reducing the pressure measuring terminal, more timely updated reliably measured value of the terminal, the handover execution facilitate timely and accurate, but also can greatly improve the flexibility of the load balancing system. 本发明通过比较同频或异频小区路径损耗大小,来判断终端是否进入切换区域,及确定具体的切换目标小区。 By comparing the present invention, inter-frequency or intra-frequency cell path loss size, the terminal determines whether to enter the switching area, and determines the handover target cell specific. 本发明的测量控制方法主要体现在两个方面:1)若终端上报的是1G/1D/2A事件(最佳同频或异频小区发生改变时),系统认为此情况下终端所在位置附近的小区间干扰小,则系统要求终端进行传统意义上的小区间切换,即终端切换时选择的同频或异频目标小区由1G/1D/2A 事件提供。 Measurement control method of the present invention mainly in two aspects: 1) If the terminal is reported 1G / 1D / 2A events (with the best time-frequency or inter-frequency cell change), the system location of the terminal that is located near this case small inter-cell interference, the system requires the terminal inter-cell handover in the traditional sense, i.e., when the terminal switches select the same or different frequency by the target cell 1G / 1D / 2A events. 2 )若终端上报的是链路质量恶化事件,系统认为此情况下小区间干扰较大, 则系统要求终端进行基于负荷的切换。 2) If the terminal is reported link quality deterioration event, the system considers the inter-cell interferences this case, the system requires the terminal based on the switching load. 此时系统要求终端在上报链路质量恶化事件时,还要同时附加上报同频小区与/或异频小区最小的路径损耗测量值(同频小区与/或异频小区路径损耗测量值的报告个数不超过三个,上报时已经对该不超过三个的路径损耗测量值按大小排序,且排在第一位的就是其中最小的一个),系统再4艮据终端上报的这些小区的测量报告及获取的负荷信息决定终端切换的目标小区。 At this time, when the system requires the terminal to report the link quality deteriorates event, it would also have the additional report intra-frequency cells and / or minimum value of path loss measurements inter-frequency cell (intra-frequency cell and / or inter-frequency cell path loss measurement report the number of no more than three, have no more than three of the path loss measurement report when the values ​​are sorted by size, and these cells is one row in a first one of the smallest), the system then reported by the terminal 4, according to the Gen and obtaining a load measurement report information determining handover target cell. 通过调整链路质量恶化的门限值,系统可以在切换成功率与切换次数之间做一个合理的折中考虑。 By adjusting the link quality deterioration threshold, the system can make a reasonable compromise between the consideration handover success rate and the number of switches. 参见图2,基于本发明测量控制方法的切换流程框图。 Referring to Figure 2, a block diagram of handover process based on a measurement control method of the present invention. 步骤21, RNC配置并发送UE测量控制信息。 Step 21, RNC sending UE measurement configuration and control information. 本发明给出用于本测量控制方法的终端测量控制配置,其中链路质量恶化事件对应的UE测量控制信息根据实际采用的无线资源管理(RRM: Radio Resource Management )算法灵活配置。 The terminal measures the present invention are given for the present method of controlling the measurement configuration wherein the event corresponding to a link quality deterioration UE according to measurement control information used in an actual radio resource management (RRM: Radio Resource Management) algorithms flexible configuration. UE测量控制配置,包括:1 )在UE同频测量(Intra-frequency measurement )消息中设置事件(具体配置为1G Event或/及ID Event )测量配置信息。 UE measurement control configuration, comprising: 1) intra-frequency measurement (Intra-frequency measurement) message event provided UE (specifically configured to 1G Event or / and ID Event) measurement configuration information. 2 )在UE异频测量(Inter-freq醒cy measurement)消息中设置事件(具体配置为2A Event)测量配置信息,并在此消息的附加测量信息中附加同频测量消息的测量ID。 2) Set Event inter-frequency measurement the UE (Inter-freq wake cy measurement) message (specifically configured 2A Event) measurement configuration information, and the additional measurement with the message ID in the additional pilot measurement information in this message. 3 )在UE测量消息中设置与链路质量恶化事件对应的UE测量配置事件,并在此消息的附加测量信息中附加同频测量消息及异频测量消息的测量ID。 3) provided with the UE measures the link quality message corresponding to the event of deterioration of UE measurement configuration events and messages with additional measurement frequency and inter-frequency measurement message ID in the additional measurement information in this message. 需要说明的是:上述配置方案中各个测量消息必须按照上述配置方案中的描述次序(指1-2-3的顺序)顺序地组织并发送;上述的同频/异频测量配置, 要求终端只测量每个相邻基站支持的一个载波(相邻基站可能会支持多个载波, 只测量其中的一个载波就可避免对其它栽波的不必要的测量);测量ID由Uu 4妄口消息MEASUREMENT CONTROL中的IE— "Measurement Identity"给出。 Note that: the above-described embodiment the configuration of each message must be measured as described in the above-described configuration scheme in order (refer to the order 1-2-3) organized sequentially and transmitting; the above-described intra-frequency / inter-frequency measurement configuration, only the request terminal measuring each of the adjacent base station supports a carrier (neighboring base station may support a plurality of carriers, wherein the carrier only one measure can avoid unnecessary measurements of other plant wave); Uu 4 measured by the jump ID interface message mEASUREMENT CONTROL of IE- "Measurement Identity" is given. 上述配置方法是本发明技术方案实现的基础。 The method of the above arrangement is the basis of the aspect of the present invention is implemented. 步骤22, RNC接收来自UE的测量报告,该测量报告是UE根据RNC配置给UE的测量控制信息组织及顺序上报的。 Step 22 is, RNC receives the measurement report from the UE, the UE according to the measurement report to the RNC measurement configuration of the UE control information sequence and organization reported. 步骤23,RNC对来自终端的测量报告进行上报事件判断,即判断是1G/1D/2A 事件还是链路恶化事件,是1G/1D/2A事件则执行步骤241、 242,是链路恶化事件则执行步骤251、 252。 Step 23, RNC measurement report from the terminal and report the event determination, i.e., determines a 1G / 1D / 2A deterioration event or event link is 1G / 1D / 2A event executes step 241, 242, the event is a deterioration of the link perform steps 251, 252. 该判断有利于保证链路质量,且其算法简单易行。 The judgment will help ensure link quality, and its algorithm is simple. 步骤241,在终端上报1G/1D/2A事件时,系统要求终端进行传统意义上的小区间切换,终端切换时采用的同频或异频目标小区由1G/1D/2A事件提供,再根据导频信号测量信息(导频信号强度最强)生成切换目标小区;步骤242,按确定的切换目标小区进行小区间切换。 Step 241, when the terminal reports 1G / 1D / 2A event, the system requires a terminal between cells in the traditional sense switch, with use of the terminal switching frequency or inter-frequency target cell provided by the 1G / 1D / 2A events, then according to the guide pilot signal measurement information (the strongest pilot signal strength) generates a handover target cell; step 242, inter-cell handover in the determined handover target cell. 步骤251,在终端上报链路恶化事件时,系统要求终端进行基于负荷的负荷均衡切换,根据负荷信息及小区测量信息生成负荷均衡切换的目标小区。 Step 251, when the terminal reports an event link is deteriorated, the system load balance request terminal based on the switching load, the measurement information to generate a target cell load according to a load balancing handover and cell information. 假定:相邻基站支持N个不同的下行载波。 Assumed: N neighboring base station supports different downlink carriers. 基站支持的N个下行载波标号i, i = l, 2, 3,…,N;终端测量报告消息中的若干个小区(代表距离其最近的几个基站)标号j, j = l,…,j";基站j上载波i的负荷大小为、,终端对基站j测量得到的路径损耗测量值为M,。则RNC负荷均衡切换目标小区的生成方法分为两步: (1 )首先根据UE上报的最小路径损耗测量值M,,确定出该最小路径损耗测量值气对应的基站为切换目标基站。(2 )然后对切换目标基站上的各个载波的负荷大小排序,负荷最小的上行与下行载波就是切换目标小区对应的上行与下行载波,其中TDD模式的上行栽波与下行载波相同。在计算该切换目标基站上的各个载波的负荷大小时,为了有效均衡小区间 Base station supports N downlink carriers numeral i, i = l, 2, 3, ..., N; terminal measurement report message several cells (which represents the distance of the nearest several base stations) reference j, j = l, ..., j "; i on the magnitude of the load carrier base station j to the base station to the terminal j ,, path loss measurements measured value M ,. the RNC handover load balancing method of generating a target cell is divided into two steps: (1) the first UE the minimum path loss measurement reported by M ,, is determined that the value of the minimum value of the path loss measurement gas corresponding to the handover target base station. (2) then the size of the load on each carrier handover target base station ordering, the minimum uplink and the downlink load carrier handover target cell is the corresponding uplink and downlink carrier, wherein the uplink TDD mode the same downlink carrier wave planted in the calculation of load size on the respective carriers handover target base station, in order to effectively inter-cell balancing

负荷,每个载波的负荷大小都需要考虑距离UE最近的若干个基站上相同载波负荷的互相影响,即计算该切换目标基站上每个栽波的负荷,是按与切换目标基站上栽波相同的距离UE最近的至多三个基站(包括该切换目标基站)上栽波负荷之和计算得到。 Load, load size for each carrier needs to consider the influence from the UE on each carrier load the same latest several base stations, i.e., calculates the load of each switching wave planted on the target base station, the same plant according to the handover target base wave UE planting distances and the calculated sum wave load on the latest up to three base stations (including the handover target base station). 上面用于计算负荷大小的基站是链路质量恶化时附加上报的同频与/或异频邻小区路径损耗测量值所一一对应的基站。 The above base station for calculating the load size is reported by the link quality degradation with additional frequency and / or inter-frequency neighbor cell base station measures the path loss values ​​one to one. 如果某基站不存在此栽波,则该基站上此栽波对应负荷值取为0。 If a base station in this plant wave does not exist, the base station corresponding to this wave plant load value is taken as 0. 切换目标基站上载波i上的负荷大小为:<formula>formula see original document page 12</formula>此切换目标基站,N个载波上负荷最小的栽波为切换目标小区对应的载波。 Handover target base station on the magnitude of the load on the carrier i is: <formula> formula see original document page 12 </ formula> this handover target base station, the minimum load of N carriers handover target cell planted wave corresponding to the carrier. 公式(I )中基站j上载波i的负荷(、)大小是RNC周期性计算的结果,其计算方法如下:如果待切换用户工作在TDD模式,当其所使用的上行与下行码资源均不跨时隙时,则负荷、代表基站j上载波i的最小时隙负荷值,是该载波i的上行最小时隙负荷值与下行最小时隙负荷值的平均值;当其所使用的上行或下行码资源跨时隙时,则负荷、代表基站J上载波i的时隙负荷平均值,是该栽波i 的上下行所有时隙的时隙负荷平均值。 Formula (I) in the base station j on the load carrier i (,) is the result of the size of the RNC periodically calculated, which is calculated as follows: If the user switches to be working in the TDD mode, uplink and downlink code resources when they are not used across time slots, load, minimum load value representative base station j time slots on carrier i, the carrier is an uplink time slot i is the minimum load value and the minimum average downlink slot load value; which it is used or when the uplink downlink code resources across time slots, the load, the carrier time slots representative base station J i load average is the average of the load slot planted vertically traveling wave i of all slots. 如果待切换用户工作在FDD模式,则负荷、代表基站j上载波i的载波负荷。 If the user switched to be working in FDD mode, the load, the representative base station j carrier load carrier i. 计算载波负荷时需要区分上行/下行栽波,即其上行载波负荷就是上行载波对应的载波负荷,下行载波负荷就是下行载波对应的载波负荷。 Calculating the need to distinguish between the uplink carrier load / downlink planted wave, i.e., a load which uplink carrier is an uplink carrier corresponding to the load carrier, the load carrier is a downlink carrier corresponding to the downlink carrier load. 上述通过负荷均衡切换进行小区间负荷均衡的实现方法筒单灵活。 By the above-described switching of the load balancing inter-cell load balancing method to achieve a single flexible tube. 步骤252,按确定的负荷均衡切换目标小区(确定的切换目标基站与切换目标小区对应的载波)进行负荷均衡切换。 Step 252, the load balancing is determined by the handover target cell (handover target base station and determining the handover target cell carrier corresponding to) handover for load balancing. 本发明方法使UE在切换时只需测量最少个数的同频和/或异频小区,使终端测量值的更新更加及时与可靠,有利于及时准确地切换,并且可切换的 The method of the present invention that the UE only measured at the frequency with the minimum number of switch and / or inter-frequency cells, the measured values ​​for the update of the terminal more timely and reliable, timely and accurate manner conducive to switching, and switchable

TDD/FDD异频目标载波个数不受限制,有利于载波间的负荷均衡。 TDD / FDD inter-frequency certain number of carriers not limited facilitate load balancing between carriers. 总之,本发明降低了终端实现切换的复杂度,提高用户切换的成功率,并尽可能地保i正了链路质量,同时本发明降低了小区间负荷均衡算法的复杂度。 In summary, the present invention reduces the complexity of the terminal to achieve switching, improve the success rate of the handover user, and n i as the defenses of link quality, while the present invention reduces the complexity of inter-cell load balancing algorithm.

Claims (9)

1.一种移动通信小区切换的测量控制方法,无线网络控制器RNC接收来自用户设备UE的测量报告,该测量报告按RNC为UE配置的测量控制信息组织并上报,其特征在于包括: A.在UE上报链路恶化事件报告的同时,还附带若干个距离该UE最近基站上同频与/或异频小区的路径损耗测量报告值,并执行步骤B;在UE上报1G/1D/2A事件报告时,执行步骤C; B.RNC根据该若干个路径损耗测量报告值和其对应的若干基站上载波的负荷确定负荷均衡的切换目标基站及切换目标小区对应的载波; C.RNC从UE的1G/1D/2A事件提供的同频或异频目标小区中,根据导频信号测量信息生成切换目标小区。 Measurement control method for a mobile communication cell handover, the radio network controller RNC receives the measurement report from the user equipment UE, the measurement report by the UE measurement configuration RNC control information organization and reported, characterized by comprising: A. the deterioration of the link reporting event report at the UE, it is also included a number of the UE from the nearest base station with the same frequency / inter-frequency cell or the path loss measurement report values, and step B; reporting 1G / 1D / 2A events in UE reporting, step C; B.RNC loss measurements reported values ​​of several base stations and on which a load carrier corresponding load balance determined handover target base station and the handover target cell based on the carrier corresponding to a plurality of paths; C.RNC from the UE with the 1G / 1D / 2A events or different frequency provided by the target cell, the handover target cell pilot signal measurement information generated based.
2. 根据权利要求1所述的方法,其特征在于RNC为UE配置测量控制信息, 包括:a. 在UE同频测量消息中设置1G/1D事件测量配置信息;b. 在UE异频测量消息中设置2A事件测量配置信息,并在该UE异频测量消息的附加测量信息中附加同频测量消息的测量ID;c. 在UE测量消息中设置链路恶化事件对应的测量配置信息,并在该UE 测量消息的附加测量信息中附加同频测量消息及异频测量消息的测量ID。 2. The method according to claim 1, characterized in that the RNC configures the UE measurement control information, comprising:.. A set 1G / 1D event the UE measurement configuration information message intra-frequency measurement; b. Inter-frequency measurement the UE message 2A provided in the event measurement configuration information, and additional measurement message ID intra-frequency measurement in the additional information of the UE measuring inter-frequency measurement message;. c disposed deterioration event link information corresponding to the measurement configuration message, the UE measurement, and additional measurement information of the UE measurement message in the message with additional measurement frequency and inter-frequency measurement message ID.
3. 根据权利要求2所述的方法,其特征在于:RNC将所述测量控制信息按所述a —b —c的顺序组织并发送给UE;在所述步骤a的同频测量配置与步骤b 的异频测量配置中,要求UE只测量每个相邻基站支持的一个载波。 3. The method according to claim 2, wherein: RNC according to the measurement control information to the sequential organization of a -b -c sends the UE; frequency measurement in the same configuration and said step of step a b inter-frequency measurement configuration, the UE is required to measure only one carrier supported by each neighbor base station.
4. 根据权利要求1所述的方法,其特征在于所述步骤A中,所述的若干个距离UE最近基站上同频与/或异频小区的路径损耗测量报告值,是所述UE通过测量系统所要求的相邻基站上的一个同频载波或一个异频载波所得到的至多三个同频与/或异频小区的最小路径损耗值。 4. The method according to claim 1, wherein said step A, said plurality of base station nearest from the UE with the same frequency / path loss measurement report values ​​or inter-frequency cell, the UE is by up to three, the same frequency and / or inter-frequency cell with a minimum path loss value or a different carrier frequency on the carrier frequency required by the measurement system obtained by neighboring base stations.
5. 根据权利要求4所述的方法,其特征在于所述步骤B进一步包括: Bl. RNC将得到的至多三个路径损耗测量报告值中最小的一个路径损寿毛测量报告值对应的基站确定为切换目标基站;B2.计算该切换目标基站上每个载波的负荷,并按大小进行排序; B3.将负荷最小的载波作为所述的切换目标小区对应的载波。 5. The method of claim 4, wherein said step B further comprises:. Bl path loss measurement report up to three values ​​obtained RNC in a minimum path loss of life gross measurement report determined value corresponding to the base station for the handover target base station;. B2 calculating the load of each carrier on the handover target base station, according to the size of the sort;. the B3 minimum load carrier as said carrier corresponding to the handover target cell.
6. 根据权利要求5所述的方法,其特征在于:所述步骤B2中,切换目标基站上每个栽波的负荷,是按与该切换目标基站上载波相同并包括该切换目标基站的距离UE最近的至多三个基站上载波负荷之和计算得到的,该距离UE最近的至多三个基站是链路质量恶化时附加上报的同频与/或异频邻小区路径损耗测量值所——对应的基站。 6. The method according to claim 5, wherein: said step B2, the switching load of each base station planted on the target wave, the carrier is identical to the handover target base station and the handover target base station includes a distance by up to three recent carrier load station UE and the sum calculated by the UE from the nearest base station is the link up to three additional quality degradation reported with the same frequency / inter-frequency neighbor cells or path loss measurement values ​​- corresponding base station.
7. 根据;f又利要求6所述的方法,其特征在于:所述基站上每个载波的负荷由RNC周期性计算,包括:如果所述UE工作在时分双工模式,上、下行载波相同,当所使用的上行与下行码资源均不跨时隙时,计算的栽波负荷是基站上该载波的最小时隙负荷值;当所使用的上行与下行码资源跨时隙时,计算的载波负荷是基站上该栽波的时隙负荷平均值;如果所述UE工作在频分双工模式,区分上行/下行载波计算所述的载波负荷,上行载波负荷是上行载波对应的载波负荷,下行栽波负荷是下行载波对应的载波负荷;所述步骤B3中,将负荷最小的上行与下行载波分别作为所述切换目标小区对应的上行与下行载波。 The; F and Li method of claim 6, wherein: the load of each carrier calculated at the base station periodically by the RNC, comprising: if the UE operates in a time division duplex mode, uplink and downlink carrier the same, when the uplink and downlink code used resources are not cross slots, planted wave load calculation slot is a minimum value of the load carrier at the base station; when the uplink and downlink code resources used in the cross-slot, the calculated carrier load average load is the slot at the base station of the plant wave; and if the UE operates in a frequency division duplex mode, to distinguish the uplink / downlink carrier is calculated according to the load carrier, the load carrier is an uplink carrier corresponding to the uplink carrier load, downlink load carrier wave is planted downlink carrier corresponding to a load; step B3, the minimum load of the uplink and downlink carriers handover target cell corresponding to the uplink and downlink, respectively, as a carrier.
8. 根据权利要求7所述的方法,其特征在于:所述的最小时隙负荷值,是根据所述载波上行最小时隙负荷值与下行最小时隙负荷值计算的平均值。 8. The method according to claim 7, wherein: said slot minimum load values, are the average of the minimum load value and the downlink time slot the minimum slot load value calculated from the uplink carrier.
9. 根据权利要求7所述的方法,其特征在于:所述的时隙负荷平均值,是根据所述载波上行与下行所有时隙计算的负荷平均值。 9. The method according to claim 7, wherein: said slot load average, based on the average value of the load carrier uplink and downlink time slots in all calculations.
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