WO2015123935A1

WO2015123935A1 - Load balancing method, device and computer storage medium

Info

Publication number: WO2015123935A1
Application number: PCT/CN2014/078836
Authority: WO
Inventors: 刘俊强; 刘柳; 王珂; 常永宇
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-02-20
Filing date: 2014-05-29
Publication date: 2015-08-27
Also published as: CN104869592A

Abstract

Embodiments of the present invention provide a load balancing method, a device and a computer storage medium among base stations in a heterogeneous network. The load balancing method can be applied to a target base station in a first type of base stations and a second type of base stations in the heterogeneous network. The transmission power of the first type of base stations is larger than that of the second type of base stations, and at least one second-type base station is located in the coverage range of the first-type base station. The method comprises: judging whether overloading occurs or not, and if the overloading occurs, implementing a control operation associated with a cell individual offset (CIO), where the control operation associated with the CIO is used to cause at least one user terminal currently served by the target base station to select one base station as a service base station, and the base station selected by the user terminal is a base station except the target base station in the first type of base stations and the second type of base stations.

Description

负载均衡方法、装置及计算储介质 Load balancing method, device and calculation storage medium

技术领域 Technical field

本发明涉及通信技术，尤其涉及一种异构网络中基站间的负载均衡方法、装置及计算机存储介质。背景技术 The present invention relates to communication technologies, and in particular, to a load balancing method, apparatus, and computer storage medium between base stations in a heterogeneous network. Background technique

异构网络（ HetNet， Heterogeneous Network ) 是指在原有的宏基站 ( MNB， Macro NodeB ) 与其服务用户所形成的宏蜂窝网络中加入基站 ( LNB, Low Power NodeB ), 用户终端（UE， User Equipment )根据自身的位置及接收到的两基站的功率等参数自适应的在接入 MNB与 LNB中进行选择。 MNB与 LNB都可以作为用户的服务基站，并且由于 LNB可以作为 MNB的补充，分担 MNB的负担，填补 MNB的覆盖盲区，因此，异构网络往往有着更高的容量和更好的覆盖效果。 Heterogeneous network (HetNet, Heterogeneous Network) refers to a base station (LNB, Low Power NodeB), and a user equipment (UE, User Equipment) in a macro cellular network formed by an original macro base station (MNB, Macro NodeB) and its service users. The selection is made in the access MNB and the LNB according to parameters such as its own location and the received power of the two base stations. Both the MNB and the LNB can serve as the serving base station of the user, and since the LNB can be used as a supplement to the MNB, the burden of the MNB is shared, and the coverage area of the MNB is filled. Therefore, the heterogeneous network often has higher capacity and better coverage.

在传统的同构网络中，各个基站的发射功率相同，用户终端根据接收到的下行导频功率强度选择服务基站，不会出现上下行不均衡的问题。但是，异构网络中，由于引入了发射功率和 MNB相差很大的 LNB，下行方向上各个基站的发射功率不再一样，而上行方向上都是接收用户终端发射的功率，所以下行覆盖边界更靠近 LNB，而上行覆盖边界为 MNB和 LNB 的中间。若这时候用户终端按照传统的方法选择服务基站，即比较接收到各个基站导频强度的方法，即使用户终端更靠近 LPN，但是该用户终端也有可能选择宏基站作为其服务基站。这些用户终端位于上行覆盖分界与下行覆盖分界之间，这个区域被称为不均衡区域。如图 1 所示，再把这一区域划分，区域中靠近宏基站的一部分，以上行覆盖边界和软切换边界为界限，这个区域里的用户终端为宏基站用户终端，但是到微基站的路损更小，所以为了让宏基站接收并解调这些用户终端的信号，这些用户终端的发射功率都较大，会对基站造成较大的上行干扰。而区域中靠近基站的一部分，在下行覆盖边界和软切换边界之间，这个区域里的用户终端由宏基站进行服务，但是微基站也在这些用户终端的激活集里，微基站可以对这些用户终端进行功率控制，减小这些用户终端的发射功率，避免太大的上行干扰，但是发射功率的减小降低了这些用户终端的信号在宏站处的接收质量。信道接收质量的降低，尤其是上行的控制信道接收质量的降低会大大影响***的性能。 In a conventional homogeneous network, the transmit power of each base station is the same, and the user terminal selects the serving base station according to the received downlink pilot power strength, and there is no problem of uplink and downlink imbalance. However, in a heterogeneous network, the LNBs with different transmit powers and MNBs are introduced, and the transmit power of each base station in the downlink direction is no longer the same, while the uplink direction is the power transmitted by the receiving user terminal, so the downlink coverage boundary is further Close to the LNB, and the upstream coverage boundary is in the middle of the MNB and LNB. If the user terminal selects the serving base station according to the conventional method at this time, that is, the method of receiving the pilot strength of each base station is compared, even if the user terminal is closer to the LPN, the user terminal may select the macro base station as its serving base station. These user terminals are located between the uplink coverage boundary and the downlink coverage boundary, and this area is called an imbalance area. As shown in FIG. 1, this area is further divided into a part of the area close to the macro base station, and the above-mentioned line coverage boundary and soft handover boundary are bounded. The user terminal in this area is a macro base station user terminal, but the path to the micro base station. The loss is smaller, so in order for the macro base station to receive and demodulate the signals of these user terminals, the transmission of these user terminals The power is large, causing large uplink interference to the base station. And a part of the area close to the base station is between the downlink coverage boundary and the soft handover boundary, and the user terminals in the area are served by the macro base station, but the micro base station is also in the activation set of the user terminals, and the micro base station can serve these users. The terminal performs power control to reduce the transmission power of these user terminals to avoid too much uplink interference, but the reduction of the transmission power reduces the reception quality of the signals of these user terminals at the macro station. The reduction in channel reception quality, especially the degradation of the uplink control channel reception quality, greatly affects the performance of the system.

在通常情况下，宏基站的负载要大于微基站的负载，但在某些情况下，也会出现微基站的负载要大于宏基站的负载，例如宏基站覆盖一个工厂，另外还有一个：基站覆盖一个礼堂。工厂在礼堂里召开职工大会的时候，绝大部分人在礼堂内或礼堂附近，则此时覆盖该礼堂的微基站的负载要比覆盖该工厂的宏基站的负载高得多。这种情况下，虽然这些新增的微基站用户到微基站的路损比到宏站小，但是由于微基站负载过重，每个用户终端能分配到的授权很小，用户终端所能发射的功率很小，进而导致微基站接收到用户终端信号的信噪比（ SINR， Signal to Interference plus Noise Ratio ) 值很小。并且这时候宏基站用户是减小的，每个宏基站用户分配到的授权变大，发射功率也增大，对基站的上行干扰也增大。 Under normal circumstances, the load of the macro base station is greater than the load of the micro base station, but in some cases, the load of the micro base station is also greater than the load of the macro base station, for example, the macro base station covers one factory, and another one: base station Cover an auditorium. When the factory held a staff meeting in the auditorium, most of the people were in the auditorium or near the auditorium. At this time, the load of the micro base station covering the auditorium was much higher than the load of the macro base station covering the factory. In this case, although the path loss of the newly added micro base station users to the micro base station is smaller than that of the macro station, since the micro base station is overloaded, the authorization that each user terminal can allocate is small, and the user terminal can transmit. The power is small, and the signal to interference plus noise ratio (SINR) of the signal received by the micro base station is small. At this time, the macro base station user is reduced, the authorization assigned by each macro base station user becomes larger, the transmission power also increases, and the uplink interference to the base station also increases.

这种例子在实际生活中很常见，再比如说一个宏基站位于一个小山包上，负责覆盖周围的几个村庄，每个村子中都有一个微基站。白天人们出了村子到田里工作，宏基站的负载较高，而微基站负载较低。相反的，晚上人们都回村子里了，宏基站的负载降低，而各个微基站的负载升高，这时候就应该把一部分基站用户卸载给宏基站。 This kind of example is very common in real life. For example, a macro base station is located on a small hill, which is responsible for covering several surrounding villages. Each village has a micro base station. During the day, people out of the village to work in the field, the macro base station has a higher load, and the micro base station has a lower load. On the contrary, in the evening, people return to the village, the load of the macro base station is reduced, and the load of each micro base station is increased. At this time, some base station users should be offloaded to the macro base station.

上述例子都已经说明了由于不同时间内用户分布的显著变化，需要实时进行负载控制。 WCDMA ***中主要的负载控制有：准入控制、负载平衡控制、数据调度以及拥塞控制。 The above examples have all demonstrated that real-time load control is required due to significant changes in user distribution over time. The main load controls in WCDMA systems are: admission control, load balancing control, data scheduling, and congestion control.

准入控制是指用户在一个小区建立新的呼叫或者切换的时候， ***根据当前的负载情况以及预测用户进入后负载来决定是否允许用户进入系统。这样虽然保护了***的正常运行，但是对那些新来呼叫而无法得到服务的用户是不公平的。 Admission control refers to the system root when a user establishes a new call or handover in a cell. The user is allowed to enter the system based on the current load situation and predicting the user entering the post load. This protects the normal operation of the system, but it is unfair to those who are new to the call and unable to get service.

负载平衡控制，同载频的负载平衡控制的办法是呼吸效应，指的是小区基站负载过重的时候，可以减小该基站的发射功率，缩小基站的覆盖范围，从而把一部分用户卸载到邻基站上。但是，减少发射功率会减小接收信号的 SINR值，从而减小***的性能，并且在异构网络中，基站负载过重的时候，由于微基站的发射功率本来就小，如果再继续减小其发射功率，会加大***的上下行不均衡。所以异构网络中微基站过载不适合使用呼吸效应。 Load balancing control, the load balancing control method of the same carrier frequency is the breathing effect, which means that when the cell base station is overloaded, the transmitting power of the base station can be reduced, the coverage of the base station can be reduced, and some users can be offloaded to the neighboring area. On the base station. However, reducing the transmit power reduces the SINR value of the received signal, thereby reducing the performance of the system, and in a heterogeneous network, when the base station is overloaded, the transmit power of the micro base station is originally small, if it continues to decrease Its transmit power will increase the system's uplink and downlink imbalance. Therefore, the overload of the micro base station in the heterogeneous network is not suitable for the respiratory effect.

数据调度是为了提高小区资源的利用率，引进 Packet Scheduling技术，在小区的速率不可控业务过载过大或者过小的时候，相应减小或者增加尽力服务（BE， Best Effort )业务的吞吐率，以控制小区的整体负载在一个稳定的水平。数据调度属于高层的负载控制，并且会削弱一些 BE业务的传输性能。 Data scheduling is to improve the utilization of cell resources. The Packet Scheduling technology is introduced to reduce or increase the throughput of best-effort (BE) services when the rate of uncontrollable traffic in the cell is too large or too small. To control the overall load of the cell at a stable level. Data scheduling is a high-level load control and can impair the transmission performance of some BE services.

拥塞控制主要的处理方法是保证一些高优先级的业务，暂停一些低优先级的业务。属于高层的负载管理。并且，我们希望尽量不要出现拥塞。 The main processing method of congestion control is to guarantee some high-priority services and suspend some low-priority services. It belongs to the high-level load management. And, we hope to avoid congestion as much as possible.

上述各种方法中，只有负载平衡控制是在不影响其它业务性能的情况下，来实现负载平衡的，使***的整体性能最好的方法。但是传统的负载平衡控制、呼吸效应在异构网络中不能解决微基站过载的情况。发明内容 Among the above various methods, only load balancing control is a method that achieves load balancing and does not affect the performance of other services, so that the overall performance of the system is the best. However, the traditional load balancing control and breathing effects cannot solve the overload of the micro base station in the heterogeneous network. Summary of the invention

本发明实施例提供了一种异构网络中基站间的负载均衡方法、装置及计算机存储介质，能够避免相关技术中的负载控制技术影响业务性能或加大了异构网络中的上下行不均衡的问题。 The embodiments of the present invention provide a load balancing method, a device, and a computer storage medium between base stations in a heterogeneous network, which can prevent the load control technology in the related technology from affecting service performance or increase uplink and downlink imbalance in a heterogeneous network. The problem.

本发明实施例的技术方案是这样实现的：本发明实施例一种负载均衡方法，所述负载均衡方法应用于异构网络中的第一类型基站与第二类型基站中的目标基站，所述第一类型基站的发射功率大于所述第二类型基站的发射功率，所述第一类型基站的覆盖范围内至少存在一个所述第二类型基站，所述方法包括： The technical solution of the embodiment of the present invention is implemented as follows: In the embodiment of the present invention, a load balancing method is applied to a target base station in a first type of base station and a second type of base station in a heterogeneous network, where a transmit power of the first type of base station is greater than the second The transmitting power of the type of the base station, the at least one of the second type of base stations is located in the coverage of the first type of base station, and the method includes:

判断所述目标基站是否存在过载； Determining whether the target base station has an overload;

当所述目标基站存在过载时，执行一小区个体偏置（ CIO, Cell Individual Offset )相关的控制操作，所述 CI0相关的控制操作用于使所述目标基站当前服务的至少一个用户终端选择一个基站作为服务基站，且所述用户终端所选择的基站为所述第一类型基站与第二类型基站中除所述目标基站之外的基站。 When the target base station is overloaded, perform a cell-specific offset (CIO) control operation, where the CI0-related control operation is used to select at least one user terminal currently served by the target base station. The base station serves as a serving base station, and the base station selected by the user terminal is a base station other than the target base station among the first type base station and the second type base station.

优选地，当所述目标基站为所述第二类型基站时，所述 CI0相关的控制操作包括：减小小区个体偏置 CI0，并向所述第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端发送 CI0减小消息，所述 CI0减小消息用于控制接收到所述 CI0减小消息的用户终端确定减小后的 CI0值，并根据减小后的 CI0值选择服务基站； Preferably, when the target base station is the second type of base station, the CI0 related control operation includes: reducing a cell individual offset CI0, and serving the user terminal of the second type of base station, and an active set The user terminal including the second type of base station sends a CI0 reduction message, where the CI0 reduction message is used to control the user terminal that receives the CI0 reduction message to determine the reduced CI0 value, and according to the reduced The CI0 value selects the serving base station;

当所述目标基站为所述第一类型基站时，所述 CI0相关的控制操作包括：向所述目标基站的覆盖范围内的第二类型基站发送 CI0增大请求，所述 CI0增大请求用于使接收到所述 CI0增大请求的第二类型基站增大 CI0，并向所述第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端发送 CI0增大消息，所述 CI0增大消息用于控制接收到所述 CI0增大消息的用户终端确定增大后的 CI0值，并^ =艮据增大后的 CI0值选择服务基站。 When the target base station is the first type of base station, the CI0 related control operation includes: sending a CI0 increase request to the second type of base station within the coverage of the target base station, where the CI0 increase request is used And causing the second type of base station that receives the CI0 increase request to increase CI0, and sending a CI0 increase message to the user terminal served by the second type of base station and the user terminal including the second type of base station in the active set. The CI0 increase message is used to control the user terminal that receives the CI0 increase message to determine the increased CI0 value, and to select the serving base station according to the increased CI0 value.

优选地，所述向所述目标基站的覆盖范围内的第二类型基站发送 CI0 增大请求，包括： Preferably, the sending the CI0 increase request to the second type of base station in the coverage of the target base station includes:

通过无线网络控制器向所述目标基站的覆盖范围内的第二类型基站发送 CI0增大请求。优选地，所述向所述第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端发送 CIO消息，包括： A CI0 increase request is sent by the radio network controller to a second type of base station within the coverage of the target base station. Preferably, the sending the CIO message to the user terminal that is served by the second type of base station, and the user terminal that includes the second type of base station in the activation set, includes:

通过主公共控制物理信道向所述第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端发送 CIO消息。 A CIO message is sent to a user terminal serving the second type of base station by a primary common control physical channel, and a user terminal including the second type of base station in an activation set.

优选地，所述通过主公共控制物理信道向所述第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端发送 CIO消息，包括： Preferably, the sending the CIO message to the user terminal that serves the second type of base station by using the primary common control physical channel, and the user terminal that includes the second type of base station in the activation set, includes:

通过主公共控制物理信道中的最后一个时隙的最后 256个码片向所述第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端发送 CIO消息。 The CIO message is sent to the user terminal served by the second type of base station and the user terminal including the second type of base station in the active set by the last 256 chips of the last slot in the primary common control physical channel.

优选地，当所述目标基站为第二类型基站时，所述 CIO相关的控制操作还包括增大噪声填充（NP， Noise Padding ); Preferably, when the target base station is a second type of base station, the CIO related control operation further includes increasing noise filling (NP, Noise Padding);

当所述目标基站为第一类型基站时，所述 CIO相关的控制操作还包括：向所述目标基站的覆盖范围内的第二类型基站发送 NP减小请求，所述 NP 减小请求用于使得所述目标基站的覆盖范围内第二类型基站减小 NP。 When the target base station is the first type of base station, the CIO related control operation further includes: sending an NP reduction request to the second type of base station within the coverage of the target base station, where the NP reduction request is used for The second type of base station within the coverage of the target base station is reduced by NP.

优选地，所述异构网络为高速上行链路分组接入异构网络。 Preferably, the heterogeneous network is a high speed uplink packet access heterogeneous network.

本发明实施例还提供一种负载均衡装置，包括： The embodiment of the invention further provides a load balancing device, including:

判断模块，配置为判断目标基站是否存在过载，所述目标基站为异构网络中的第一类型基站与第二类型基站中的目标基站，所述第一类型基站的发射功率大于所述第二类型基站的发射功率，所述第一类型基站的覆盖范围内至少存在一个所述第二类型基站； The determining module is configured to determine whether the target base station is overloaded, the target base station is a target base station in the first type of base station and the second type of base station in the heterogeneous network, and the transmit power of the first type of base station is greater than the second Transmit power of the type base station, at least one of the second type of base stations exists in the coverage of the first type of base station;

执行模块，配置为当所述目标基站存在过载时，执行一 CIO相关的控制操作，所述 CIO相关的控制操作配置为使所述目标基站当前服务的至少一个用户终端选择一个基站作为服务基站，且所述用户终端所选择的基站为所述第一类型基站与第二类型基站中除目标基站之外的基站。 An execution module, configured to perform a CIO-related control operation when the target base station is overloaded, where the CIO-related control operation is configured to enable at least one user terminal currently served by the target base station to select one base station as the serving base station, And the base station selected by the user terminal is a base station other than the target base station in the first type of base station and the second type of base station.

优选地，所述执行模块包括：调整单元，配置为当所述目标基站为第二类型基站时，减小小区个体偏置 CIO; Preferably, the execution module comprises: The adjusting unit is configured to: when the target base station is the second type of base station, reduce the cell individual offset CIO;

第一发送单元，配置为向所述第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端发送 CIO减小消息，所述 CIO减小消息用于控制接收到所述 CIO 减小消息的用户终端确定减小后的 CIO 值，并根据减小后的 CIO值选择服务基站； a first sending unit, configured to send a CIO reduction message to a user terminal serving the second type of base station, and a user terminal in the activation set including the second type of base station, where the CIO reduction message is used to control receiving The user terminal that describes the CIO reduction message determines the reduced CIO value, and selects the serving base station according to the reduced CIO value;

第二发送单元，配置为所述目标基站为第一类型基站时，向所述目标基站的覆盖范围内的第二类型基站发送 CIO增大请求，所述 CIO增大请求用于使接收到所述 CIO增大请求的第二类型基站增大 CIO，并向所述第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端发送 CIO增大消息，所述 CIO增大消息用于控制接收到所述 CIO增大消息的用户终端确定增大后的 CIO值，并根据增大后的 CIO值选择服务基站。 a second sending unit, configured to send, to the second type of base station in the coverage of the target base station, a CIO increase request, where the target base station is a first type of base station, where the CIO increase request is used to enable receiving The second type of base station of the CIO increase request increases the CIO, and sends a CIO increase message to the user terminal served by the second type of base station and the user terminal including the second type of base station in the active set, the CIO increase The large message is used to control the user terminal that receives the CIO increase message to determine the increased CIO value, and select the serving base station according to the increased CIO value.

优选地，所述第二发送单元，还配置为通过无线网络控制器向所述目标基站的覆盖范围内的第二类型基站发送 CIO增大请求。 Preferably, the second sending unit is further configured to send, by the radio network controller, a CIO increase request to the second type of base station in the coverage of the target base station.

优选地，所述第一发送单元，还配置为通过主公共控制物理信道向所述第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端发送 CIO消息。 Preferably, the first sending unit is further configured to send a CIO message to a user terminal serving the second type of base station by using a primary common control physical channel, and a user terminal including the second type of base station in an activation set.

优选地，所述第一发送单元，还配置为通过主公共控制物理信道中的最后一个时隙的最后 256个码片向所述第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端发送 CIO消息。 Preferably, the first sending unit is further configured to: the user terminal serving the second type of base station by using the last 256 chips of the last slot in the primary common control physical channel, and the activation set including the first The user terminal of the second type of base station sends a CIO message.

优选地，所述调整单元还配置为所述目标基站为第二类型基站时增大 P; Preferably, the adjusting unit is further configured to increase P when the target base station is a second type of base station;

所述第二发送单元还配置为所述目标基站为第一类型基站时，向所述目标基站的覆盖范围内的第二类型基站发送 NP减小请求，所述 NP减小请求用于使得所述目标基站的覆盖范围内第二类型基站减小 NP。 The second sending unit is further configured to: when the target base station is the first type of base station, send an NP reduction request to the second type of base station in the coverage of the target base station, where the NP reduction request is used to make the The second type of base station within the coverage of the target base station reduces the NP.

优选地，所述异构网络为高速上行链路分组接入异构网络。本发明实施例还提供一种计算机存储介质，所述计算机存储介质中存储有计算机可执行指令，所述计算机可执行指令用于执行以上所述的负载均衡方法。 Preferably, the heterogeneous network is a high speed uplink packet access heterogeneous network. The embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the load balancing method described above.

本发明实施例的有益效果是： The beneficial effects of the embodiments of the present invention are:

本发明实施例提供的技术方案，针对异构网络中基站间负载不均衡的问题，尤其是由用户终端的分布变化而引起的基站间的负载不均衡的问题，通过调整异构网络中的低功率的基站的 CIO，实现了异构网络中基站间的负载均衡，避免了相关技术中的负载控制方法影响技术影响业务性能或加大了异构网络中的上下行不均衡的问题。附图说明 The technical solution provided by the embodiment of the present invention is directed to the problem of unbalanced load between base stations in a heterogeneous network, in particular, the problem of load imbalance between base stations caused by distribution changes of user terminals, by adjusting low in heterogeneous networks. The CIO of the power base station implements load balancing between the base stations in the heterogeneous network, and avoids the problem that the load control method in the related technology affects the service performance of the technology or increases the uplink and downlink imbalance in the heterogeneous network. DRAWINGS

图 1为异构网络中上下行不均衡的示意图； Figure 1 is a schematic diagram of uplink and downlink imbalance in a heterogeneous network;

图 2为本发明实施例 1提供的异构网络中基站间的负载均衡方法的流程图； 2 is a flow chart of a method for load balancing between base stations in a heterogeneous network according to Embodiment 1 of the present invention;

图 3为异构网络中修改 CIO值对异构网络的覆盖影响示意图；图 4为主公共控制物理信道的帧结构； FIG. 3 is a schematic diagram of the impact of modifying a CIO value on a heterogeneous network in a heterogeneous network; FIG. 4 is a frame structure of a main common control physical channel;

图 5为本发明实施例提供的异构网络中基站间的负载均衡装置；图 6为 HSUPA异构网络中对微基站进行过载处理过程的流程图；图 7为 HSUPA异构网络中对宏基站进行过载处理过程的流程图；图 8为 HSUPA异构网络中对微基站及宏基站进行负载均衡过程的流程图。具体实施方式 FIG. 5 is a flowchart of a load balancing device between base stations in a heterogeneous network according to an embodiment of the present invention; FIG. 6 is a flowchart of an overload processing procedure for a micro base station in an HSUPA heterogeneous network; FIG. 7 is a macro base station in an HSUPA heterogeneous network. Flowchart for performing an overload processing procedure; FIG. 8 is a flow chart of a load balancing process for a micro base station and a macro base station in an HSUPA heterogeneous network. detailed description

为使本发明实施例要解决的技术问题、技术方案和优点更加清楚，下面将结合附图及具体实施例进行详细描述。 The technical problems, the technical solutions, and the advantages of the embodiments of the present invention will be more clearly described in the following description.

发明人在实施本发明的过程中发现，相关技术提供的上述各种方法中，只有负载平衡控制是在不影响其它业务性能的情况下，来实现负载平衡的，使***的整体性能最好的方法，但是传统的负载平衡控制、呼吸效应在异构网络中不能解决微基站过载的情况，这是因为呼吸效应可能减小微基站的发射功率，并导致异构网络中的上下行不均衡加大。 The inventors have found in the process of implementing the present invention that among the above various methods provided by the related art, Only load balancing control is the best way to achieve load balancing and improve the overall performance of the system without affecting other service performance. However, traditional load balancing control and breathing effects cannot solve micro base station overload in heterogeneous networks. In this case, the respiratory effect may reduce the transmission power of the micro base station and cause an increase in uplink and downlink imbalance in the heterogeneous network.

本发明实施例记载了一种基站间的负载均衡方法、装置及计算机存储介质，能够通过调整异构网络中的低功率的基站的 CIO，实现异构网络中基站间的负载均衡。 The embodiments of the present invention describe a method, a device, and a computer storage medium for load balancing between base stations, which can implement load balancing between base stations in a heterogeneous network by adjusting CIOs of low-power base stations in a heterogeneous network.

图 2为本发明实施例提供的异构网络中基站间的负载均衡方法的流程图，所述负载均衡方法应用于所述异构网络中目标基站，所述异构网络中包括第一类型基站与第二类型基站，所述第一类型基站的发射功率大于所述第二类型基站的发射功率，所述第一类型基站的覆盖范围内至少存在一个所述第二类型基站，如图 2所示，所述方法包括以下步骤： 2 is a flowchart of a method for load balancing between base stations in a heterogeneous network according to an embodiment of the present disclosure, where the load balancing method is applied to a target base station in the heterogeneous network, where the heterogeneous network includes a first type of base station. With the second type of base station, the transmit power of the first type of base station is greater than the transmit power of the second type of base station, and at least one of the second type of base stations exists in the coverage of the first type of base station, as shown in FIG. 2 The method includes the following steps:

步骤 S200，判断目标基站是否存在过载。 Step S200: Determine whether the target base station has an overload.

步骤 S202，当存在过载时，执行一小区个体偏置 CIO相关的控制操作。所述 CIO相关的控制操作用于使所述目标基站当前服务的至少一个用户终端选择一个基站作为服务基站，且所述用户终端所选择的基站为所述第一类型基站与第二类型基站中除目标基站之外的基站。 Step S202: When there is an overload, perform a cell-specific bias CIO related control operation. The CIO-related control operation is used to enable at least one user terminal currently served by the target base station to select one base station as a serving base station, and the base station selected by the user terminal is the first type of base station and the second type of base station. A base station other than the target base station.

CIO是指用户终端在进行小区选择的时候，将接收到的各个小区的导频信号强度加上对应的小区个体偏置来进行比较，当某个小区的 CIO值增大时，会增大用户终端选择该小区概率，当减小某个小区的 CIO值时，则会减小用户终端选择该小区的概率。 CIO means that when the user terminal performs cell selection, the received pilot signal strength of each cell is compared with the corresponding cell individual offset to compare, and when the CIO value of a certain cell increases, the user is increased. The terminal selects the probability of the cell. When the CIO value of a certain cell is decreased, the probability that the user terminal selects the cell is reduced.

在上述技术方案中，首先目标基站判断是否存在过载，当目标基站存在过载时，执行一 CIO相关的控制操作，以使所述目标基站当前服务的用户终端中的至少一个用户终端根据所述 CIO相关的控制操作选择一个基站作为服务基站，所述目标基站选择的基站为所述第一类型基站与第二类型基站中除所述目标基站之外的一个基站，从而，减少了该目标基站当前服务的用户终端的数量，实现了对该目标基站进行卸载的目的。 In the foregoing technical solution, first, the target base station determines whether there is an overload, and when the target base station is overloaded, performs a CIO-related control operation, so that at least one user terminal currently served by the target base station is according to the CIO. The related control operation selects a base station as the serving base station, and the base station selected by the target base station is a base station other than the target base station in the first type of base station and the second type of base station, thereby reducing the current target base station Service The number of user terminals of the service achieves the purpose of offloading the target base station.

作为一个实施方式，所述目标基站为第二类型基站时，所述 CIO相关的控制操作可以包括：减小小区个体偏置 CIO，并向所述第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端发送 CIO 减小消息，所述 CIO减小消息用于控制接收到所述 CIO减小消息的用户终端确定减小后的 CIO值，并根据减小后的 CIO值选择服务基站；所述目标基站为第一类型基站时，所述 CIO相关的控制操作可以包括：向所述目标基站的覆盖范围内的第二类型基站发送 CIO增大请求，所述 CIO增大请求用于使接收到所述 CIO增大请求的第二类型基站增大 CIO，并向所述第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端发送 CIO增大消息，所述 CIO增大消息用于控制接收到所述 CIO增大消息的用户终端确定增大后的 CIO值，并根据增大后的 CIO值选择服务基站。 As an implementation manner, when the target base station is a second type of base station, the CIO related control operations may include: reducing a cell individual offset CIO, and serving the user terminal of the second type of base station, and an active set a user terminal including the second type of base station sends a CIO reduction message, where the CIO reduction message is used to control a user terminal that receives the CIO reduction message to determine a reduced CIO value, and according to the reduced The CIO value is selected as the serving base station; when the target base station is the first type of base station, the CIO related control operation may include: sending a CIO increase request to the second type of base station within the coverage of the target base station, the CIO The increase request is for causing the second type of base station that receives the CIO increase request to increase the CIO, and send the user terminal that serves the second type of base station and the user terminal that includes the second type of base station in the active set a CIO increase message, the CIO increase message is used to control a user terminal that receives the CIO increase message to determine an increased CIO value, and root CIO after increasing the value of a serving base station selection.

在上述技术方案中，当目标基站即过载的基站为第二类型基站时，所述 CIO相关的控制操作可以为减小小区个体偏置 CIO，向目标基站即该第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端发送 CIO减小消息，以控制接收到所述 CIO减小消息的用户终端根据所述 CIO减小消息确定减小后的 CIO值选择月良务基站，由于该第二类型基站的 CIO减小，则接受到该消息的用户终端在选择服务基站时，尤其是对处于切换区域的用户终端，对于本应该将该第二类型基站切换为服务基站的用户终端（即激活集中包括该第二类型基站的用户终端）的切换过程延迟，从而，减小了该第二类型基站服务用户终端继续增多的可能，同时对于该第二类型基站当前服务的用户终端中倾向于将其他基站切换为服务基站的用户终端的切换过程提前，从而，减小了该第二类型基站服务的用户终端，即实现了对该第二类型基站的负载进行卸载的目的。 In the foregoing technical solution, when the target base station, that is, the overloaded base station is the second type of base station, the CIO related control operation may be a user terminal that reduces the cell individual offset CIO and serves the target base station, that is, the second type of base station. And a user terminal that includes the second type of base station in the activation set sends a CIO reduction message, to control a user terminal that receives the CIO reduction message to determine a reduced CIO value according to the CIO reduction message, and select a month If the CIO of the second type of base station is reduced, the user terminal receiving the message selects the serving base station, especially for the user terminal in the handover area, and should switch the second type of base station to the service. The handover process delay of the user terminal of the base station (ie, the user terminal in the activation set including the second type of base station), thereby reducing the possibility that the second type of base station serving user terminal continues to increase, and simultaneously serving the second type of base station User terminal in the user terminal tends to switch the other base station to the user terminal of the serving base station In advance, thereby reducing the user terminal served by the second type of base station, that is, the purpose of offloading the load of the second type of base station is achieved.

当目标基站即过载的基站为第一类型基站时，所述 CIO相关的控制操作可以为向所述目标基站的覆盖范围内的第二类型基站发送 CIO 增大请求，以使得接收到所述 CIO增大请求的第二类型基站增大 CIO，并向所述第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端发送 CIO增大消息， CIO增大消息用以控制用户终端（即接收到所述 CIO增大消息的用户终端）才艮据所述 CIO增大消息确定增大后的 CIO值，根据增大后的 CIO值选择服务基站，由于该第一类型基站的覆盖范围内的第二类型基站的 CIO增大，第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端接收到了该 CIO增大消息，尤其是对处于切换区域的用户终端，即第一类型基站当前服务的用户终端中倾向于将该第一类型基站的覆盖范围内的某一第二类型基站切换为服务基站的用户终端（也即当前服务基站为所述第一类型基站且激活集中包括所述第二类型基站的用户终端），在处于切换区域的用户终端接受到该 CIO增大消息后选择服务基站时，可以使切换过程提前，从而，减少了该第一类型基站服务用户终端，即实现了对该第一类型基站的负载进行卸载的目的。 When the target base station, that is, the overloaded base station is the first type of base station, the CIO related control operation may be to send a CIO to the second type of base station within the coverage of the target base station. Soliciting, so that the second type of base station receiving the CIO increase request increases the CIO, and sends a CIO increase to the user terminal served by the second type of base station and the user terminal including the second type of base station in the active set The big message, the CIO increase message is used to control the user terminal (ie, the user terminal that receives the CIO increase message) to determine the increased CIO value according to the CIO increase message, according to the increased CIO value. Selecting a serving base station, the user terminal served by the second type of base station, and the user terminal including the second type of base station receiving the CIO are received because the CIO of the second type of base station in the coverage of the first type of base station is increased. Increasing the message, especially for the user terminal in the handover area, that is, the user terminal currently served by the first type of base station, tends to switch the second type of base station within the coverage of the first type of base station to the user of the serving base station. The terminal (that is, the current serving base station is the first type of base station and the active set includes the user terminal of the second type of base station) is in the handover area When the user terminal receives the selected serving base station after increasing CIO message, the handover procedure can be made in advance, thus reducing the first type base stations which service a user terminal, i.e. the load to achieve the object of the first type base stations will be unloaded.

举例说明口下： For example:

有第一类型基站 A，该第一类型基站 A的信号覆盖范围内有第二类型基站 Al、第二类型基站 A2及第二类型基站 A3。 There is a first type of base station A. The signal coverage of the first type of base station A includes a second type of base station Al, a second type of base station A2, and a second type of base station A3.

当基站 A1过载时，将减小基站 A1的 CIO值，同时，向基站 A1服务用户终端及激活集中包括基站 A1 的用户终端发送 CIO值减小的消息，对于基站 A1服务用户终端，即使用基站 A1作为服务基站的用户终端，在接收到基站 A1 的 CIO值减小的消息后，会根据该消息选择其服务基站，从而，使得部分用户终端的将选择其他基站作为其服务基站，对于激活集中包括基站 A1的用户终端，在接收到基站 A1的 CIO值减小的消息后，在选择其服务基站时，会使得部分用户终端避免选择基站 A1作为其服务基站，因此，实现了对基站 A1进行卸载的目的。 When the base station A1 is overloaded, the CIO value of the base station A1 is reduced, and the CIO value reduction message is sent to the base station A1 serving user terminal and the user terminal including the base station A1 in the activation set. For the base station A1 to serve the user terminal, the base station is used. A user terminal serving as the serving base station, after receiving the message that the CIO value of the base station A1 is reduced, selects its serving base station according to the message, so that some user terminals select other base stations as their serving base stations, for the active set. The user terminal including the base station A1, after receiving the message that the CIO value of the base station A1 is reduced, when selecting the serving base station, causes some user terminals to avoid selecting the base station A1 as its serving base station, thereby implementing the base station A1. The purpose of the uninstallation.

当基站 A过载时，基站 A向基站 Al、基站 A2及基站 A3发送 CIO增大请求，基站 A1收到该请求后，增大基站 A1的 CIO值，并向基站 A1服务用户终端及激活集中包括基站 A1 的用户终端发送 CIO增大的消息，其中，接收到该消息的用户终端中包括：激活集中包括基站 A1 的基站 A服务的用户终端，即当前使用基站 A作为服务基站且激活集中包括基站 A1 的用户终端，这些用户终端在接收到基站 A1 的 CIO增大的消息后，会根据该消息选择其服务基站，从而，使得部分用户终端的服务基站从基站 A 变为基站 Al，实现了对基站 A进行卸载的目的，类似的，基站 A2及基站 A3在接收到 CIO增大请求后，会执行相似的操作，实现对基站 A进行卸载的目的。 When the base station A is overloaded, the base station A sends a CIO increase request to the base station A1, the base station A2, and the base station A3. After receiving the request, the base station A1 increases the CIO value of the base station A1, and serves the base station A1. The user terminal and the user terminal in the activation set including the base station A1 send a message that the CIO is increased. The user terminal that receives the message includes: the user terminal that is served by the base station A of the base station A1 in the activation set, that is, the base station A is currently used. Serving the base station and the active set includes the user terminals of the base station A1. After receiving the CIO increase message of the base station A1, the user terminals select their service base stations according to the message, thereby causing the serving base stations of some user terminals to change from the base station A. For the base station A1, the base station A is unloaded. Similarly, after receiving the CIO increase request, the base station A2 and the base station A3 perform similar operations to achieve the purpose of offloading the base station A.

在对第二类型基站的 CIO值进行调整时，并不会加大上下行不均衡的问题。如图 3 所示，图中所示宏站即为发射功率较高的第一类型基站，微站即为发射功率较低的第二类型基站，微站位于宏站的信号覆盖范围内。当微站的 CIO值为 OdB时，下行覆盖边界点位于 A点处，如果此时的宏站过载，需要对宏站的信号覆盖范围内的微站的 CIO值进行调整，增大微站的 CIO值，比如增大 3dB，此时下行覆盖边界点将会向宏站移动 3dB，位于 B点处，从而，使得站的服务区域增大，相应的宏站的服务区域减小，一部分用户从宏站卸载到站上，并且，宏站的边缘用户终端对站产生的上行干扰减弱。由于，在此过程中，并没有对宏站或微站的发射功率进行调整，因此，并不会加大该异构网络中的上下行不均衡。 When the CIO value of the second type of base station is adjusted, the problem of uplink and downlink imbalance is not increased. As shown in Figure 3, the macro station shown in the figure is the first type of base station with higher transmit power, and the micro station is the second type of base station with lower transmit power. The micro station is located within the signal coverage of the macro station. When the CIO value of the micro station is OdB, the downlink coverage boundary point is located at point A. If the macro station is overloaded at this time, it is necessary to adjust the CIO value of the micro station within the signal coverage of the macro station to increase the micro station. The CIO value, for example, increases by 3dB. At this time, the downlink coverage boundary point will move to the macro station by 3dB, which is located at point B, thereby increasing the service area of the station, and reducing the service area of the corresponding macro station. The macro station is offloaded to the station, and the uplink interference generated by the edge user terminal of the macro station to the station is weakened. Since, in this process, the transmit power of the macro station or the micro station is not adjusted, the uplink and downlink imbalance in the heterogeneous network is not increased.

作为一个实施方式，所述向所述目标基站的覆盖范围内的第二类型基站发送 CIO增大请求，可以通过以下方式实现：通过无线网络控制器向所述目标基站的覆盖范围内的第二类型基站发送 CIO增大请求。 As an implementation manner, the sending, by the second type of base station in the coverage of the target base station, the CIO increase request may be implemented by: performing, by the wireless network controller, a second coverage within the coverage of the target base station The type base station sends a CIO increase request.

在上述技术方案中，当第一类型基站的负载过重的时候，通过无线网络控制器（RNC， Radio Network Controller )给在第一类型基站的信号覆盖范围内的所有第二类型基站发送增大 CIO的请求，即通过 RNC将 CIO增大请求发送给其信号覆盖范围内的第二类型基站。 In the foregoing technical solution, when the load of the first type of base station is excessive, the radio network controller (RNC, Radio Network Controller) sends an increase to all the second type of base stations in the signal coverage of the first type of base station. The request of the CIO, that is, the CIO increase request is sent by the RNC to the second type of base station within its signal coverage.

作为一个实施方式，向第二类型基站服务的用户终端及激活集中包括所述第二类型基站的用户终端发送 CIO消息，可以通过以下方式实现：通过主公共控制物理信道向第二类型基站服务的用户终端及激活集中包括所述第二类型基站的用户终端发送 CIO消息。 As an embodiment, the user terminal and the activation set serving the second type of base station include The user terminal of the second type of base station sends a CIO message, which can be implemented by: sending a CIO message to a user terminal serving the second type of base station by using the primary common control physical channel and a user terminal including the second type of base station in the activation set. .

在上述技术方案中，由于第二类型基站需要向用户终端发送 CIO消息，而所述用户终端不仅包括该第二类型基站服务用户终端（即将该第二类型基站选择为服务基站的用户终端），还包括激活集中包括该第二类型基站的用户终端，因此，可以通过主公共控制物理信道向这些用户终端发送消息，即由主公共控制物理信道承载该第二类型基站的 CIO消息。 In the foregoing technical solution, the second type of base station needs to send a CIO message to the user terminal, and the user terminal includes not only the second type of base station serving user terminal (that is, the second type of base station is selected as the user terminal of the serving base station), The user terminal including the second type of base station is also activated in the active set. Therefore, the message can be sent to the user terminals through the primary common control physical channel, that is, the CIO message of the second type of base station is carried by the primary common control physical channel.

作为一个实施方式，所述通过主公共控制物理信道向第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端发送 CIO 消息，可以通过以下方式实现：通过主公共控制物理信道中的最后一个时隙的最后 256个码片向第二类型基站服务的用户终端及激活集中包括所述第二类型基站的用户终端发送 CIO消息。 As an embodiment, the sending of the CIO message to the user terminal serving the second type of base station by using the primary common control physical channel and the user terminal including the second type of base station in the activation set may be implemented by: The last 256 chips of the last time slot in the physical channel send a CIO message to the user terminal served by the second type of base station and the user terminal including the second type of base station in the active set.

在上述技术方案中，图 4为主公共控制物理信道的帧结构，如图 4所示，由于主公共控制物理信道占用固定 SF=256，每个帧中有 15个时隙，每个时隙的头 256码片（chips )为空，由 SCH填充，可以选择第 15个时隙的最后 256个 chips, 即通过主公共控制物理信道的最后一个符号来传递 CIO消息，可以将该 CIO消息成为 CIO指示（CIO indicator ), 其中，该最后一个符号由两个比特调制形成，即该符号包括两个比特，因此，如果 CIO 指示为 CIO增大 ldB，则该两个比特可以设置为 1、 1，如果 CIO指示为 CIO减小 ldB，则该两个比特可以设置为 -1、 -1。 In the above technical solution, FIG. 4 is a frame structure of a main common control physical channel. As shown in FIG. 4, since the primary common control physical channel occupies a fixed SF=256, there are 15 time slots in each frame, and each time slot The first 256 chips are empty, filled by the SCH, and the last 256 chips of the 15th time slot can be selected, that is, the CIO message is transmitted through the last symbol of the main common control physical channel, and the CIO message can be CIO indicator (CIO indicator), wherein the last symbol is formed by two bits modulation, that is, the symbol includes two bits, so if the CIO indicates that CIO increases ldB, the two bits can be set to 1, 1 If the CIO indicates that the CIO is reduced by ldB, the two bits can be set to -1, -1.

噪声填充（NP， Noise Padding )是某个基站服务用户终端在受到较强的其他基站服务用户终端的上行干扰的时候，通过提升该基站的接收天线的底噪，使基站接收到的用户终端的上行信号 SINR下降，为了使得该 SINR 值提升至理想状态，需要使该基站服务用户终端的发射功率增大，而由于其他基站服务用户终端的发射功率不变，因此，使得其他基站服务用户对该基站服务用户的上行干扰减小。通常情况下， NP可以配合 CIO来使用。作为一个实施方式，当所述目标基站为第二类型基站时，所述 CIO相关的控制操作还可以包括增大 NP; 当所述目标基站为第一类型基站时，所述 CIO相关的控制操作还可以包括：向所述目标基站的覆盖范围内的第二类型基站发送 NP减小请求， NP减小请求用于使接收到所述 NP减小请求的第二类型基站减小 NP。 NP (Noise Padding) is a user terminal of a base station serving user terminal that receives the uplink interference of the receiving antenna of the base station when it is subjected to uplink interference of the other base station serving user terminal. The SINR of the uplink signal is decreased. In order to increase the SINR value to an ideal state, the base station needs to increase the transmission power of the user terminal, and since the transmission power of the other base station serving the user terminal does not change, the other base station serves the user. The uplink interference of the base station serving user is reduced. Normally, NP can be used with CIO. As an embodiment, when the target base station is a second type of base station, the CIO related control operation may further include: increasing an NP; when the target base station is a first type of base station, the CIO related control operation The method may further include: transmitting an NP reduction request to the second type of base station within the coverage of the target base station, where the NP reduction request is used to reduce the NP of the second type of base station that receives the NP reduction request.

在上述技术方案中，当某一第二类型基站增大 CIO时，同时可以减小该第二类型基站的 NP，当某一第二类型基站减小 CIO时，同时可以增大该第二类型基站的 NP。当过载的基站为第二类型基站时，可以减小该过载的第二类型基站的 CIO，以使第二类型基站服务的用户终端根据所述第二类型基站的 CIO减小消息选择服务基站，从而减少该第二类型基站的服务用户；类似地，可以通过增大该第二类型基站的 NP的方式来实现上述目的；当过载的基站为第一类型基站时，可以通过增大过载的第一类型基站的覆盖范围内的第二类型基站的 CIO，以使第一类型基站服务用户终端根据相应的第二类型基站的 CIO增大消息选择服务基站，从而减少该第一类型基站服务的用户终端，同时，可以减小过载的第一类型基站的覆盖范围内的第二类型基站的 NP来实现上述目的。 In the foregoing technical solution, when a certain type of base station increases CIO, the NP of the second type of base station can be reduced at the same time, and when a certain type of base station decreases CIO, the second type can be increased at the same time. The NP of the base station. When the overloaded base station is the second type of base station, the CIO of the overloaded second type of base station may be reduced, so that the user terminal served by the second type of base station selects the serving base station according to the CIO reduction message of the second type of base station, Thereby reducing the service user of the second type of base station; similarly, the above object can be achieved by increasing the NP of the second type of base station; when the overloaded base station is the first type of base station, the overloaded a CIO of a second type of base station within a coverage of a type of base station, such that the first type of base station serving user terminal selects a serving base station according to a CIO increase message of the corresponding second type of base station, thereby reducing users of the first type of base station service The terminal, meanwhile, can reduce the NP of the second type of base station within the coverage of the overloaded first type of base station to achieve the above object.

作为一个实施方式，所述异构网络为高速上行链路分组接入异构网络。本发明实施例还记载一种计算机存储介质，所述计算机存储介质中存储有计算机可执行指令，所述计算机可执行指令用于执行图 2 所述的负载均衡方法。 As an implementation manner, the heterogeneous network is a high speed uplink packet access heterogeneous network. The embodiment of the invention further describes a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the load balancing method described in FIG.

本发明实施例还记载了一种异构网络中基站间的负载均衡装置 50，如图 5所示，所述装置 50包括： The embodiment of the present invention further describes a load balancing device 50 between base stations in a heterogeneous network. As shown in FIG. 5, the device 50 includes:

判断模块 51，配置为判断目标基站是否存在过载，所述目标基站为异构网络中的第一类型基站与第二类型基站中的目标基站，所述第一类型基站的发射功率大于所述第二类型基站的发射功率，所述第一类型基站的覆盖范围内至少存在一个所述第二类型基站； The determining module 51 is configured to determine whether the target base station is overloaded, the target base station is a target base station in the first type of base station and the second type of base station in the heterogeneous network, and the transmit power of the first type of base station is greater than the first Transmit power of two types of base stations, coverage of the first type of base station There is at least one of the second type of base stations within the cover;

执行模块 52，配置为当目标基站存在过载时，执行一 CIO相关的控制操作，所述 CIO相关的控制操作用于使所述目标基站当前服务的至少一个用户终端选择一个基站作为服务基站，且所述用户终端所选择的基站为所述第一类型基站与第二类型基站中除目标基站之外的基站。 The execution module 52 is configured to perform a CIO-related control operation when the target base station is overloaded, where the CIO-related control operation is used to enable at least one user terminal currently served by the target base station to select one base station as the serving base station, and The base station selected by the user terminal is a base station other than the target base station among the first type of base station and the second type of base station.

作为一个实施方式，所述执行模块包括（图 5中未示出）： As an embodiment, the execution module includes (not shown in FIG. 5):

调整单元，配置为当所述目标基站为第二类型基站时，减小小区个体偏置 CIO; An adjusting unit, configured to: when the target base station is a second type of base station, reduce a cell individual offset CIO;

第二发送单元，配置为当所述目标基站为第一类型基站时，向所述目标基站的覆盖范围内的第二类型基站发送 CIO增大请求，所述 CIO增大请求用于使接收到所述 CIO增大请求的第二类型基站增大 CIO，并向所述第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端发送 CIO增大消息，所述 CIO增大消息用于控制接收到所述 CIO增大消息的用户终端确定增大后的 CIO值，并根据增大后的 CIO值选择服务基站。 a second sending unit, configured to: when the target base station is a first type of base station, send a CIO increase request to a second type of base station in a coverage area of the target base station, where the CIO increase request is used to enable receiving The second type of base station of the CIO increase request increases CIO, and sends a CIO increase message to a user terminal served by the second type of base station and a user terminal including the second type of base station in an active set, the CIO The increase message is used to control the user terminal receiving the CIO increase message to determine the increased CIO value, and select the serving base station according to the increased CIO value.

所述第二发送单元，还配置为通过无线网络控制器向所述目标基站的覆盖范围内的第二类型基站发送 CIO增大请求。 The second sending unit is further configured to send a CIO increase request to the second type of base station in the coverage of the target base station by using the radio network controller.

所述第一发送单元，还配置为通过主公共控制物理信道向所述第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端发送 CIO消息。 The first sending unit is further configured to send a CIO message to the user terminal serving the second type of base station by using the primary common control physical channel, and the user terminal including the second type of base station in the activation set.

作为一个实施方式，所述调整单元还配置为当所述目标基站为第二类型基站时增大 NP; 所述第二发送单元还配置为当所述目标基站为第一类型基站时，向所述目标基站的覆盖范围内的第二类型基站发送 NP减小请求，所述 NP减小请求用于使得所述目标基站的覆盖范围内第二类型基站减小 NP。 As an embodiment, the adjusting unit is further configured to increase an NP when the target base station is a second type of base station; The second sending unit is further configured to: when the target base station is the first type of base station, send an NP reduction request to the second type of base station in the coverage of the target base station, where the NP reduction request is used to make The second type of base station within the coverage of the target base station reduces the NP.

作为一个实施方式，所述异构网络可以为高速上行链路分组接入异构网络。 As an embodiment, the heterogeneous network may be a high speed uplink packet access heterogeneous network.

实际应用中，负载均衡装置 50可以设置于目标基站中，判断模块 51、执行模块 52可由负载均衡装置 50中的中央处理器（ CPU, Central Processing Unit )、数字信号处理器（DSP， Digital Signal Processor )或现场可编程门阵列（FPGA， Field Programmable Gate Array ) 实现。 In a practical application, the load balancing device 50 can be disposed in the target base station, and the determining module 51 and the executing module 52 can be implemented by a central processing unit (CPU) in the load balancing device 50, and a digital signal processor (DSP, Digital Signal Processor). ) or Field Programmable Gate Array (FPGA) implementation.

本发明实施例还记载了在 HSUPA异构网络中对基站进行过载处理的过程，在该 HSUPA异构网络中，某一基站的用户终端数量不断增大，有可能导致该微基站过载，图 6为 HSUPA异构网络中对基站进行过载处理过程的流程图，如图 6所示，处理过程包括以下步骤： The embodiment of the present invention also describes a process of performing overload processing on a base station in an HSUPA heterogeneous network. In the HSUPA heterogeneous network, the number of user terminals of a certain base station is continuously increased, which may cause overload of the micro base station, FIG. 6 A flow chart for performing an overload processing procedure on a base station in an HSUPA heterogeneous network, as shown in FIG. 6, the processing procedure includes the following steps:

步骤 S600，判断该基站是否过载，如果基站过载，进入步骤 S602，否则进入步骤 S606。 In step S600, it is determined whether the base station is overloaded. If the base station is overloaded, the process goes to step S602, otherwise, the process goes to step S606.

在该步骤中，基站的过载分为上行过载或下行过载，对于下行过载的情况，当微基站服务用户终端增多的时候，由于微基站到其信号覆盖边缘的用户终端的路径损耗最大，因此，边缘用户终端的数据传输将最先出现拥塞，拥塞可以通过位于基站端的下行数据缓存检测出来，因而可以根据边缘用户终端的下行拥塞状态，判断该微基站是否出现下行过载；对于上行过载的情况，当基站服务用户终端增多的时候，由于基站的底噪抬升值是基本固定的，因此，每个用户终端所允许的发射功率随着用户终端的增多而减小，微基站为每个用户终端分配的授权减小，微基站处接收到的上行信号的 SINR值减小，从而使得用户终端只能使用较低接的调制，传输速率变低，最终导致用户终端上行数据缓存出现拥塞，从而造成上行过载，因而可以根据边缘用户终端的上行拥塞状态，判断该微基站是否出现上行过载。 In this step, the overload of the base station is divided into an uplink overload or a downlink overload. For the downlink overload situation, when the micro base station serves the user terminal, the path loss of the user terminal of the micro base station to the edge of the signal coverage is the largest, therefore, The data transmission of the edge user terminal will be congested first. The congestion can be detected by the downlink data buffer located at the base station. Therefore, it can be determined whether the micro base station has a downlink overload according to the downlink congestion status of the edge user terminal. For the uplink overload situation, When the number of user terminals of the base station increases, since the base noise rise value of the base station is substantially fixed, the transmit power allowed by each user terminal decreases as the number of user terminals increases, and the micro base station allocates each user terminal. The authorization is reduced, and the SINR value of the uplink signal received by the micro base station is reduced, so that the user terminal can only use the lower connection modulation, and the transmission rate becomes lower, which eventually causes congestion of the uplink data buffer of the user terminal, thereby causing uplink. Overload, so it can be used according to the edge The uplink congestion state of the terminal, determining that the micro base station is No uplink overload occurs.

步骤 S602，检测当前微基站的 CIO取值是否满足预设条件，如果满足则进入步骤 S604，否则进入步骤 S606。 Step S602, detecting whether the CIO value of the current micro base station satisfies a preset condition, if yes, proceeding to step S604, otherwise proceeding to step S606.

由于 CIO值有一定的取值范围，因此，在对基站的 CIO值进行调整时，需要注意不能使得 CIO值超出预设范围，通常， CIO取值大于等于 OdB 小于等于 6dB。 Since the CIO value has a certain value range, when adjusting the CIO value of the base station, care must be taken not to make the CIO value exceed the preset range. Generally, the CIO value is greater than or equal to OdB and less than or equal to 6 dB.

步骤 S604，减小微基站的 CIO值，同时增加基站的 NP值。 Step S604, reducing the CIO value of the micro base station and increasing the NP value of the base station.

减小基站的 CIO值，以使得微基站向相关用户终端发送 CIO值减小消息，同时增加 NP值；在此步骤中，基站的 CIO值可以减小 ldB，从而使得基站向基站服务用户终端及激活集中包括该基站的用户终端发送消息，告知这些用户终端，该基站的 CIO值减小 ldB，同时，在该基站处，可以使 NP值加 1。 Decrease the CIO value of the base station, so that the micro base station sends a CIO value reduction message to the relevant user terminal, and increases the NP value; in this step, the CIO value of the base station can be reduced by ldB, so that the base station serves the user terminal to the base station and The activation set includes a user terminal of the base station to send a message to inform the user terminals that the CIO value of the base station is decreased by ldB, and at the same time, the NP value can be incremented by one at the base station.

步骤 S606，保持原有的 CIO值及 NP值。 In step S606, the original CIO value and the NP value are maintained.

本发明实施例还记载了在 HSUPA异构网络中对宏基站进行过载处理的过程，在该 HSUPA异构网络中，某一宏基站的用户终端数量不断增大，有可能导致该宏基站过载，该宏基站的信号覆盖范围内包括两个微基站，分别为基站 B1及微基站 B2，图 7为 HSUPA异构网络中对宏基站进行过载处理过程的流程图，如图 7所示，该处理过程包括以下步骤： The embodiment of the present invention also describes a process of performing overload processing on a macro base station in an HSUPA heterogeneous network. In the HSUPA heterogeneous network, the number of user terminals of a macro base station is continuously increased, which may cause overload of the macro base station. The signal coverage of the macro base station includes two micro base stations, which are a base station B1 and a micro base station B2, and FIG. 7 is a flowchart of an overload processing process for the macro base station in the HSUPA heterogeneous network, as shown in FIG. The process includes the following steps:

步骤 S700，判断该宏基站是否过载，如果过载则进入步骤 S702，否则继续判断宏基站是否过载（也可以不执行任何操作）。 Step S700: Determine whether the macro base station is overloaded. If it is overloaded, proceed to step S702. Otherwise, continue to determine whether the macro base station is overloaded (other operations may not be performed).

在该步骤中，宏基站的过载分为上行过载或下行过载，对宏基站的上行过载的判断方法及下行过载的判断方法与对微基站的过载判断方法类似。 In this step, the overload of the macro base station is divided into an uplink overload or a downlink overload, and the method for determining the uplink overload of the macro base station and the method for determining the downlink overload are similar to the method for determining the overload of the micro base station.

步骤 S702，宏基站向其覆盖范围内的微基站 B1及微基站 B2发送 CIO 增大请求。 Step S702, the macro base station sends a CIO increase request to the micro base station B1 and the micro base station B2 in its coverage area.

在此步骤中，宏基站可以通过无线网络控制器向该宏基站的信号覆盖范围内的基站发送 CIO增大 ldB的请求。 In this step, the macro base station can cover the signal of the macro base station by the radio network controller. The base station in the range sends a request for the CIO to increase the ldB.

步骤 S704，基站 B1检测其 CIO取值是否满足预设条件，如果满足则进入步骤 S708，否则进入步骤 S712。 Step S704, the base station B1 detects whether the CIO value meets the preset condition, and if yes, proceeds to step S708, otherwise proceeds to step S712.

步骤 S706，基站 B2检测其 CIO取值是否满足预设条件，如果满足则进入步骤 S710，否则进入步骤 S712。 Step S706, the base station B2 detects whether the CIO value meets the preset condition, and if yes, proceeds to step S710, otherwise proceeds to step S712.

步骤 S708，增大微基站 B1的 CIO值，同时减小基站 B1的 NP值。增大基站 B1的 CIO值，以使得基站 B1向相关用户终端发送 CIO 增大消息，同时减小 NP值；在此步骤中，基站 B1 的 CIO值可以增大 ldB, 从而使得微基站 B1向激活集中包括该微基站 B1 的宏基站服务用户终端发送消息，告知这些用户终端，基站 B1的 CIO值增大 ldB，同时，在基站 B 1处，可以使 NP值减 1。 Step S708, increasing the CIO value of the micro base station B1 while reducing the NP value of the base station B1. Increasing the CIO value of the base station B1, so that the base station B1 sends a CIO increase message to the relevant user terminal, and reduces the NP value; in this step, the CIO value of the base station B1 can be increased by ldB, so that the micro base station B1 is activated. The macro base station serving user terminal including the micro base station B1 transmits a message to inform the user terminals that the CIO value of the base station B1 is increased by ldB, and at the base station B1, the NP value can be decremented by one.

步骤 S710，增大微基站 B2的 CIO值，同时减小微基站 B2的 NP值。增大基站 B2的 CIO值，以使得基站 B2向相关用户终端发送 CIO 增大消息，同时减小 NP值；在此步骤中，基站 B2的 CIO值可以增大 ldB, 从而使得微基站 B2向激活集中包括该微基站 B2的宏基站服务用户终端发送消息，告知这些用户终端，基站 B2的 CIO值增大 ldB，同时，在基站 B2处，可以使 NP值减 1。 Step S710, increasing the CIO value of the micro base station B2 while reducing the NP value of the micro base station B2. Increasing the CIO value of the base station B2, so that the base station B2 sends a CIO increase message to the relevant user terminal, and reduces the NP value; in this step, the CIO value of the base station B2 can be increased by ldB, so that the micro base station B2 is activated. The macro base station serving user terminal including the micro base station B2 transmits a message to inform the user terminals that the CIO value of the base station B2 is increased by ldB, and at the base station B2, the NP value can be decremented by one.

步骤 S712，保持原有的 CIO值及 NP值。 In step S712, the original CIO value and the NP value are maintained.

本发明实施例还记载了对 HSUPA异构网络中宏基站及基站进行负载的过程，在该 HSUPA异构网络中，有一宏基站，该宏基站的信号覆盖范围内包括两个微基站，分别为微基站 B 1及微基站 B2，由于在对该异构网络中的任一基站进行卸载的过载中，都有可能导致该异构网络中的其他基站过载，因此，需要反复执行基站的负载均衡方法。图 8为 HSUPA异构网络中对微基站及宏基站进行负载均衡过程的流程图，如图 8所示，该处理过程包括以下步骤： The embodiment of the present invention further describes a process of performing load on a macro base station and a base station in an HSUPA heterogeneous network. In the HSUPA heterogeneous network, there is a macro base station, where the signal coverage of the macro base station includes two micro base stations, respectively The micro base station B 1 and the micro base station B2 may overload the other base stations in the heterogeneous network due to overloading of any base station in the heterogeneous network. Therefore, it is necessary to repeatedly perform load balancing of the base station. method. FIG. 8 is a flowchart of a load balancing process for a micro base station and a macro base station in a HSUPA heterogeneous network. As shown in FIG. 8, the process includes the following steps:

步骤 S800，判断微基站 B1是否过载，如果过载则进入步骤 S802，否则进入步骤 S806。 Step S800, determining whether the micro base station B1 is overloaded, if it is overloaded, proceeding to step S802, Then, the process proceeds to step S806.

步骤 S802，检测基站 Bl的 CIO取值是否满足预设条件，如果满足则进入步骤 S804，否则进入步骤 S806。 Step S802, detecting whether the CIO value of the base station Bl satisfies a preset condition, if yes, proceeding to step S804, otherwise proceeding to step S806.

步骤 S804，减小基站 B1的 CIO值，同时增加基站 B1的 NP值。减小基站 B1的 CIO值，以使得基站 B1向相关用户终端发送 CIO 值减小消息，同时增加 NP值；在此步骤中，基站 B1的 CIO值可以减小 IdB, 从而使得微基站 B1向微基站 B1服务用户终端及激活集中包括该微基站 B1的用户终端发送消息，告知这些用户终端，基站 B1的 CIO值减小 ldB，同时，在微基站 B1处，可以使 NP值加 1，从而，实现了对微基站 B1的卸载，在此过程中，部分基站 B1服务用户终端被卸载到基站 B1所属的宏基站，使得宏基站服务用户终端数量增多。 Step S804, reducing the CIO value of the base station B1 and increasing the NP value of the base station B1. The CIO value of the base station B1 is reduced, so that the base station B1 sends a CIO value reduction message to the relevant user terminal, and increases the NP value. In this step, the CIO value of the base station B1 can be reduced by the IdB, so that the micro base station B1 is micro- The base station B1 serves the user terminal and the user terminal including the micro base station B1 in the activation set to send a message, and informs the user terminals that the CIO value of the base station B1 is decreased by ldB, and at the micro base station B1, the NP value can be increased by 1, thereby The offloading of the micro base station B1 is implemented. In this process, the partial base station B1 serves the user terminal to be offloaded to the macro base station to which the base station B1 belongs, so that the number of macro base station service user terminals increases.

步骤 S806，判断宏基站是否过载，如果过载则进入步骤 S808，否则进入步骤 S800及步骤 S818。 Step S806, it is judged whether the macro base station is overloaded. If it is overloaded, the process proceeds to step S808, otherwise, the process proceeds to step S800 and step S818.

步骤 S808，宏基站向其覆盖范围内的基站 B1及基站 B2发送 CIO 增大请求。 Step S808, the macro base station sends a CIO increase request to the base station B1 and the base station B2 in its coverage.

在此步骤中，宏基站可以通过无线网络控制器向该宏基站的信号覆盖范围内的基站发送 CIO增大 IdB的请求。 In this step, the macro base station may send a CIO request for increasing the IdB by the radio network controller to the base station within the signal coverage area of the macro base station.

步骤 S810，微基站 B1检测其 CIO取值是否满足预设条件，如果满足则进入步骤 S814，否则进入步骤 S800。 Step S810, the micro base station B1 detects whether the CIO value meets the preset condition, and if yes, proceeds to step S814, otherwise proceeds to step S800.

步骤 S812，微基站 B2检测其 CIO取值是否满足预设条件，如果满足则进入步骤 S816，否则进入步骤 S818。 Step S812, the micro base station B2 detects whether the CIO value meets the preset condition, and if yes, proceeds to step S816, otherwise proceeds to step S818.

步骤 S814，增大微基站 B1的 CIO值，同时减小基站 B1的 NP值，然后进入步骤 S800。 Step S814, increasing the CIO value of the micro base station B1 while reducing the NP value of the base station B1, and then proceeding to step S800.

增大基站 Bl的 CIO值，以使得基站 B1向相关用户终端发送 CIO 增大消息，同时减小 NP值，进入步骤 S800; 在此步骤中，基站 B1 的 CIO值可以增大 ldB，从而使得基站 B1向激活集中包括该基站 B1的宏基站服务用户终端发送消息，告知这些用户终端，微基站 B1的 CIO值增大 ldB，同时，在微基站 B1处，可以使 NP值减 1，该步骤有可能导致基站 B1服务用户终端数量增多，从而使得微基站 B1再次过载，因此需要对微基站 B1再次执行卸载过程。 Increasing the CIO value of the base station B, so that the base station B1 sends a CIO increase message to the relevant user terminal, and reduces the NP value, and proceeds to step S800; in this step, the CIO value of the base station B1 can be increased by ldB, thereby causing the base station to B1 includes the base station B1 in the active set The macro base station serves the user terminal to send a message to inform the user terminals that the CIO value of the micro base station B1 is increased by ldB, and at the same time, the NP value can be decremented by one at the micro base station B1. This step may cause the number of serving user terminals of the base station B1 to increase. Therefore, the micro base station B1 is overloaded again, so it is necessary to perform the uninstall process again for the micro base station B1.

步骤 S816，增大微基站 B2的 CIO值，减小基站 B2的 NP值，进入步骤 S818。 Step S816, increasing the CIO value of the micro base station B2, reducing the NP value of the base station B2, and proceeding to step S818.

增大基站 B2的 CIO值，以使得基站 B2向相关用户终端发送 CIO 增大消息，同时减小 NP值；在此步骤中，基站 B2的 CIO值可以增大 ldB, 从而使得微基站 B2向激活集中包括该微基站 B2的宏基站服务用户终端发送消息，告知这些用户终端，基站 B2的 CIO值增大 ldB，同时，在基站 B2处，可以使 NP值减 1。 Increasing the CIO value of the base station B2, so that the base station B2 sends a CIO increase message to the relevant user terminal, and reduces the NP value; in this step, the CIO value of the base station B2 can be increased by ldB, so that the micro base station B2 is activated. The macro base station serving user terminal including the micro base station B2 transmits a message to inform the user terminals that the CIO value of the base station B2 is increased by ldB, and at the base station B2, the NP value can be decremented by one.

步骤 S818，判断基站 B2是否过载，如果过载则进入步骤 S820，否则进入步骤 S806。 Step S818, it is judged whether the base station B2 is overloaded. If it is overloaded, the process goes to step S820, otherwise, the process goes to step S806.

步骤 S820，检测基站 B2的 CIO取值是否满足预设条件，如果 CIO 取值满足预设条件，则进入步骤 S822，否则进入步骤 S806。 In step S820, it is detected whether the CIO value of the base station B2 meets the preset condition. If the CIO value satisfies the preset condition, the process goes to step S822, otherwise the process goes to step S806.

步骤 S822，减小微基站 B2的 CIO值，以使得微基站 B2向相关用户终端发送 CIO值减小消息，同时增加基站 B2的 NP值，进入步骤 S806。 Step S822, reducing the CIO value of the micro base station B2, so that the micro base station B2 sends a CIO value reduction message to the relevant user terminal, and increases the NP value of the base station B2, and proceeds to step S806.

通过上述过程，最终使得该异构网络中的宏基站、微基站 B1及微基站 B2都不会过载。 Through the above process, the macro base station, the micro base station B1, and the micro base station B2 in the heterogeneous network are not overloaded.

本领域内的技术人员应明白，本发明实施例可提供为方法、 ***、或计算机程序产品。因此，本发明可采用硬件实施例、软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质 (包括但不限于磁盘存储器和光学存储器等）上实施的计算机程序产品的形式。 Those skilled in the art will appreciate that embodiments of the invention may be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware aspects. Moreover, the invention can take the form of a computer program product embodied on one or more computer usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

本发明是参照根据本发明实施例的方法、设备（***）、和计算机程序产品的流程图和 /或方框图来描述的。应理解可由计算机程序指令实现流程图和 /或方框图中的每一流程和 /或方框、以及流程图和 /或方框图中的流程和 /或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生配置为实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的装置。 The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It should be understood that the flow can be implemented by computer program instructions Each of the processes and/or blocks in the figures and/or block diagrams, and combinations of the flows and/or blocks in the flowcharts and/or block diagrams. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine that causes configuration of instructions executed by a processor of a computer or other programmable data processing device Means for implementing the functions specified in a block or blocks of a flow or a flow and/or a block diagram of a flow chart.

这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能。 The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供配置为实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的步骤。 These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps that are configured to implement the functions specified in one or more blocks of the flowchart or in a block or blocks of the flowchart.

以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。工业实用性 The above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It should be considered as the scope of protection of the present invention. Industrial applicability

本发明实施例中，目标基站判断是否存在过载；当存在过载时，执行一小区个体偏置 CIO相关的控制操作，针对异构网络中基站间负载不均衡的问题，尤其是由用户终端的分布变化而引起的基站间的负载不均衡的问题，通过调整异构网络中的低功率的基站的 CIO，实现了异构网络中基站间的负载均衡，避免了相关技术中的负载控制方法影响技术影响业务性能或加大了异构网络中的上下行不均衡的问题。 In the embodiment of the present invention, the target base station determines whether there is an overload; when there is an overload, performs a cell-specific bias CIO-related control operation, and the problem that the load between the base stations in the heterogeneous network is unbalanced, especially by the user terminal The problem of unbalanced load between base stations caused by the change, the load balancing between the base stations in the heterogeneous network is realized by adjusting the CIO of the low-power base station in the heterogeneous network, and the load control method in the related art is avoided. Affects service performance or increases the imbalance between uplink and downlink in heterogeneous networks.

Claims

权利要求书 Claim

1. 一种负载均衡方法，应用于异构网络中的第一类型基站与第二类型基站中的目标基站，所述第一类型基站的发射功率大于所述第二类型基站的发射功率，所述第一类型基站的覆盖范围内至少存在一个所述第二类型基站，所述方法包括： A load balancing method, which is applied to a target base station in a first type of base station and a second type of base station in a heterogeneous network, where a transmit power of the first type of base station is greater than a transmit power of the second type of base station, At least one second type of base station exists in the coverage of the first type of base station, and the method includes:

当所述目标基站存在过载时，执行一小区个体偏置 CIO相关的控制操作，所述 CIO相关的控制操作用于使所述目标基站当前服务的至少一个用户终端选择一个基站作为服务基站，且所述用户终端所选择的基站为所述第一类型基站与第二类型基站中除所述目标基站之外的基站。 When the target base station is overloaded, perform a cell-specific bias CIO-related control operation, where the CIO-related control operation is used to enable at least one user terminal currently served by the target base station to select one base station as the serving base station, and The base station selected by the user terminal is a base station other than the target base station among the first type of base station and the second type of base station.

2. 如权利要求 1所述的方法，其中，当所述目标基站为所述第二类型基站时，所述 CIO相关的控制操作包括：减小小区个体偏置 CIO，并向所述第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端发送 CIO减小消息，所述 CIO减小消息用于控制接收到所述 CIO 减小消息的用户终端确定减小后的 CIO值，并才艮据减小后的 CIO值选择月良务基站； 2. The method according to claim 1, wherein, when the target base station is the second type of base station, the CIO related control operation comprises: reducing a cell individual offset CIO, and to the second a user terminal of the type base station service, and a user terminal including the second type of base station in the activation set to send a CIO reduction message, where the CIO reduction message is used to control the user terminal that receives the CIO reduction message after determining to decrease The CIO value, and select the monthly good base station according to the reduced CIO value;

当所述目标基站为所述第一类型基站时，所述 CIO相关的控制操作包括：向所述目标基站的覆盖范围内的第二类型基站发送 CIO增大请求，所述 CIO增大请求用于使接收到所述 CIO增大请求的第二类型基站增大 CIO，并向所述第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端发送 CIO增大消息，所述 CIO增大消息用于控制接收到所述 CIO增大消息的用户终端确定增大后的 CIO值，并^ =艮据增大后的 CIO值选择服务基站。 When the target base station is the first type of base station, the CIO related control operation includes: sending a CIO increase request to the second type of base station in the coverage of the target base station, where the CIO increase request is used And causing the second type of base station that receives the CIO increase request to increase the CIO, and sending a CIO increase message to the user terminal served by the second type of base station and the user terminal including the second type of base station in the active set And the CIO increase message is used to control the user terminal that receives the CIO increase message to determine the increased CIO value, and select the serving base station according to the increased CIO value.

3. 如权利要求 2所述的方法，其中，所述向所述目标基站的覆盖范围内的第二类型基站发送 CIO增大请求，包括：通过无线网络控制器向所述目标基站的覆盖范围内的第二类型基站发送 CIO增大请求。 The method of claim 2, wherein the sending the CIO increase request to the second type of base station in the coverage of the target base station comprises: A CIO increase request is sent by the radio network controller to a second type of base station within the coverage of the target base station.

4. 如权利要求 2所述的方法，其中，所述向所述第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端发送 CIO消息，包括： The method of claim 2, wherein the sending the CIO message to the user terminal that is served by the second type of base station and the user terminal that includes the second type of base station in the activation set includes:

5. 如权利要求 4所述的方法，其中，所述通过主公共控制物理信道向所述第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端发送 CIO消息，包括： 5. The method according to claim 4, wherein the user terminal serving the second type of base station by using a primary common control physical channel, and the user terminal of the activation set including the second type of base station, send a CIO message, Includes:

6. 如权利要求 2所述的方法，其中，当所述目标基站为第二类型基站时，所述 CIO相关的控制操作还包括增大噪声填充 NP; 6. The method according to claim 2, wherein, when the target base station is a second type of base station, the CIO related control operation further comprises increasing a noise filling NP;

7. 如权利要求 1至 6任一项所述的方法，其中，所述异构网络为高速上行链路分组接入异构网络。 The method according to any one of claims 1 to 6, wherein the heterogeneous network is a high speed uplink packet access heterogeneous network.

8. 一种负载均衡装置，包括： 8. A load balancing device comprising:

执行模块，配置为当所述目标基站存在过载时，执行一小区个体偏置 CIO相关的控制操作，所述 CIO相关的控制操作配置为使所述目标基站当前服务的至少一个用户终端选择一个基站作为服务基站，且所述用户终端所选择的基站为所述第一类型基站与第二类型基站中除目标基站之外的基站。 An execution module, configured to perform a cell individual offset when the target base station is overloaded a CIO-related control operation, the CIO-related control operation is configured to enable at least one user terminal currently served by the target base station to select one base station as a serving base station, and the base station selected by the user terminal is the first type of base station And a base station other than the target base station in the second type of base station.

9. 如权利要求 8所述的装置，其中，所述执行模块包括： 9. The apparatus according to claim 8, wherein the execution module comprises:

10. 如权利要求 9所述的装置，其中， 10. The apparatus according to claim 9, wherein

11. 如权利要求 9所述的装置，其中， 11. The apparatus according to claim 9, wherein

12. 如权利要求 11所述的装置，其中， 12. The apparatus according to claim 11, wherein

所述第一发送单元，还配置为通过主公共控制物理信道中的最后一个时隙的最后 256个码片向所述第二类型基站服务的用户终端、以及激活集中包括所述第二类型基站的用户终端发送 CIO消息。 The first sending unit is further configured to pass the last one of the main common control physical channels The last 256 chips of the time slot send a CIO message to the user terminal served by the second type of base station and the user terminal including the second type of base station in the active set.

13. 如权利要求 9所述的装置，其中， 13. The apparatus according to claim 9, wherein

所述调整单元还配置为所述目标基站为第二类型基站时增大噪声填充 P; The adjusting unit is further configured to increase a noise filling P when the target base station is a second type of base station;

14. 如权利要求 8至 13任一项所述的装置，其中，所述异构网络为高速上行链路分组接入异构网络。 The apparatus according to any one of claims 8 to 13, wherein the heterogeneous network is a high speed uplink packet access heterogeneous network.

15. 一种计算机存储介质，所述计算机存储介质中存储有计算机可执行指令，所述计算机可执行指令用于执行权利要求 1至 7任一项所述的负载均衡方法。 A computer storage medium storing computer executable instructions for performing the load balancing method according to any one of claims 1 to 7.