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CN1863164A - Method for controlling reverse congestion of ABIS interface and transceiver base station - Google Patents

Method for controlling reverse congestion of ABIS interface and transceiver base station Download PDF

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Publication number
CN1863164A
CN1863164A CNA2006100009035A CN200610000903A CN1863164A CN 1863164 A CN1863164 A CN 1863164A CN A2006100009035 A CNA2006100009035 A CN A2006100009035A CN 200610000903 A CN200610000903 A CN 200610000903A CN 1863164 A CN1863164 A CN 1863164A
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CN
China
Prior art keywords
congestion control
reverse
abis interface
congestion
bts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CNA2006100009035A
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Chinese (zh)
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CN100466616C (en
Inventor
王志峰
万蓉
林青
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CNB2006100009035A priority Critical patent/CN100466616C/en
Priority to PCT/CN2006/003019 priority patent/WO2007079640A1/en
Priority to CNA2006800122197A priority patent/CN101160981A/en
Publication of CN1863164A publication Critical patent/CN1863164A/en
Application granted granted Critical
Publication of CN100466616C publication Critical patent/CN100466616C/en
Expired - Fee Related legal-status Critical Current
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Abstract

本发明提供一种ABIS接口反向拥塞控制方法和收发基站，通过设置预拥塞控制门限，并检测ABIS接口反向拥塞程度，使BTS能够在ABIS接口反向还没有达到拥塞、且即将达到拥塞时，对ABIS接口反向进行拥塞控制处理，有效避免了数据丢包现象，从而有效避免了由于数据丢包引起的影响ABIS接口的数据传输性能、重传的数据浪费空口资源、重传的数据增加ABIS接口的拥塞压力、用户满意度差等问题；从而实现了提高空口资源利用率、提高用户满意度的目的。

Figure 200610000903

The invention provides an ABIS interface reverse congestion control method and a transceiver base station. By setting the pre-congestion control threshold and detecting the ABIS interface reverse congestion degree, the BTS can be used when the ABIS interface reverse has not yet reached congestion and is about to reach congestion. , the reverse congestion control process is performed on the ABIS interface, which effectively avoids the phenomenon of data packet loss, thereby effectively avoiding the impact of data packet loss on the data transmission performance of the ABIS interface, the waste of air interface resources by retransmitted data, and the increase in retransmitted data Congestion pressure of the ABIS interface, poor user satisfaction and other problems; thereby achieving the purpose of improving air interface resource utilization and improving user satisfaction.

Figure 200610000903

Description

一种ABIS接口反向拥塞控制方法和收发基站A kind of ABIS interface reverse congestion control method and transceiver base station

技术领域technical field

本发明涉及网络通讯技术领域，具体涉及一种ABIS接口反向拥塞控制方法和收发基站。The invention relates to the technical field of network communication, in particular to an ABIS interface reverse congestion control method and a transceiver base station.

背景技术Background technique

在低速的无线移动通信技术中，空口速率一般是通信的瓶颈，所以，空口速率是拥塞控制和带宽优化的重点。In low-speed wireless mobile communication technologies, the air interface rate is generally the communication bottleneck, so the air interface rate is the focus of congestion control and bandwidth optimization.

在(cdma2000 1x-RTT EVolution to packet Data Optimized services)中，反向数据流向为：AT(Access terminal，接入终端)->BTS(Base TransceiverStation，收发基站)->BSC(Base Station Controller，基站控制器)->PCF(数据业务控制功能模块)->核心网。由于单用户空口反向峰值速率可达1.8Mbps，所以，ABIS(BTS和BSC之间的接口)的接口带宽也可能成为通信的瓶颈。In (cdma2000 1x-RTT EVolution to packet Data Optimized services), the reverse data flow direction is: AT (Access terminal, access terminal) -> BTS (Base TransceiverStation, base transceiver station) -> BSC (Base Station Controller, base station control device) -> PCF (data service control function module) -> core network. Since the reverse peak rate of the single-user air interface can reach 1.8Mbps, the interface bandwidth of the ABIS (the interface between the BTS and the BSC) may also become a communication bottleneck.

由于ABIS接口的数据传输实现成本比较昂贵，如采用微波、卫星等传输方式传输数据，因此，合理有效的充分利用ABIS接口带宽就显得非常重要了。Because the data transmission cost of ABIS interface is relatively expensive, such as using microwave, satellite and other transmission methods to transmit data, it is very important to make full use of the bandwidth of ABIS interface reasonably and effectively.

AT->BTS->BSC的反向数据流向示意图如附图1所示。The reverse data flow diagram of AT->BTS->BSC is shown in Figure 1.

图1中，BTS通过空口接收AT传输来的数据，并根据数据的优先级将数据放入相应的队列中，然后，BTS根据一定的调度算法，从队列中读取数据，并通过ABIS接口将数据发送给BSC。In Figure 1, the BTS receives the data transmitted by the AT through the air interface, and puts the data into the corresponding queue according to the priority of the data. Then, the BTS reads the data from the queue according to a certain scheduling algorithm, and sends the data to the queue through the ABIS interface. Data is sent to BSC.

如果将BTS为一个业务流分配的缓冲区大小称为缓冲区长度，将某一时刻缓冲区中存储的数据量称为队列长度，那么，在通常情况下，队列长度应小于缓冲区长度。当缓冲区长度和队列长度相等时，如果仍有数据到达BTS，就会造成BTS的缓冲区溢出，BTS会丢弃其新接收到的数据包。If the buffer size allocated by the BTS for a service flow is called the buffer length, and the amount of data stored in the buffer at a certain moment is called the queue length, then, under normal circumstances, the queue length should be smaller than the buffer length. When the buffer length is equal to the queue length, if there is still data arriving at the BTS, the buffer overflow of the BTS will be caused, and the BTS will discard its newly received data packets.

从图1可以看出，当空口速率超过ABIS接口带宽时，BTS的某些队列如优先级较低的业务流对应的队列长度就会增加，当队列溢出时，BTS只好丢弃后接收的数据。瞬时的空口速率超过ABIS接口带宽是不会造成BTS队列溢出的，但是，当空口速率在较长时间内持续超过ABIS接口带宽时，就可能造成BTS队列溢出。在数据传输过程中，如果出现话务高峰、数据突发、部分ABIS接口传输故障等情况，都会导致ABIS接口带宽不足或者短时间内带宽不足，从而造成ABIS接口反向流量拥塞。此时，如果不进行适当的控制，会造成BTS的缓冲区溢出，导致数据丢包。It can be seen from Figure 1 that when the rate of the air interface exceeds the bandwidth of the ABIS interface, the length of some queues of the BTS, such as those corresponding to service flows with lower priority, will increase. When the queue overflows, the BTS has to discard the received data. The instantaneous air interface rate exceeding the ABIS interface bandwidth will not cause BTS queue overflow. However, when the air interface rate exceeds the ABIS interface bandwidth for a long time, it may cause BTS queue overflow. During the data transmission process, if traffic peaks, data bursts, transmission failures of some ABIS interfaces, etc. occur, the bandwidth of the ABIS interface will be insufficient or the bandwidth will be insufficient in a short period of time, resulting in reverse traffic congestion of the ABIS interface. At this time, if proper control is not performed, the buffer of the BTS will overflow, resulting in data packet loss.

当上层传输协议为类似于TCP的协议时，避免BTS丢弃数据包、缓解ABIS接口反向流量拥塞的方法主要有两种：When the upper-layer transmission protocol is a protocol similar to TCP, there are two main methods to prevent the BTS from discarding data packets and alleviate the reverse traffic congestion on the ABIS interface:

方法一：TCP会因为BTS的丢包而启动慢启动算法和拥塞避免算法，从而缓解ABIS接口反向流量拥塞。Method 1: TCP will start the slow start algorithm and congestion avoidance algorithm due to the packet loss of the BTS, so as to alleviate the reverse traffic congestion of the ABIS interface.

方法一中，BTS丢弃数据包会导致超时重传，并且会启动慢启动和拥塞避免算法，BTS丢弃的数据会造成RLP(Radio Link Protocol，无线链路协议)重传，重传的数据不但浪费空口资源，还会增加ABIS接口的拥塞压力，而且，慢启动和拥塞避免严重影响了系统的吞吐量。In the first method, BTS discarding data packets will lead to overtime retransmission, and will start the slow start and congestion avoidance algorithm. The data discarded by BTS will cause RLP (Radio Link Protocol, wireless link protocol) retransmission, and the retransmitted data will not only waste Air interface resources will also increase the congestion pressure of the ABIS interface, and slow start and congestion avoidance seriously affect the throughput of the system.

方法二：当ABIS接口出现拥塞后，BTS发送广播消息，将系统允许的最大发送速率通知所有的AT，从而控制所有AT的发送速率，限制空口反向速率，减缓并进一步消除ABIS接口的拥塞；当ABIS接口拥塞情况消除后，BTS发送广播消息，恢复所有AT的最大发送速率。Method 2: When the ABIS interface is congested, the BTS sends a broadcast message to inform all ATs of the maximum transmission rate allowed by the system, thereby controlling the transmission rate of all ATs, limiting the reverse rate of the air interface, and slowing down and further eliminating the congestion of the ABIS interface; When the congestion on the ABIS interface is eliminated, the BTS sends a broadcast message to restore the maximum transmission rate of all ATs.

方法二中，BTS丢弃数据包同样会导致超时重传，重传的数据浪费了空口资源、增加了ABIS接口的拥塞压力，同时，由于广播消息的发送需要一定的延迟，所以，在这段延迟的时间里拥塞情况将持续。而且，限制所有AT的最大发送速率，或者在拥塞后BTS丢弃所有后接收到的数据包，不能为优先级高的用户提供区别服务质量。BTS启动拥塞控制时，所有的AT会同时降低发送速率，拥塞消除后，所有的AT又会同时提高发送速率，可能会使BTS频繁的启动、停止拥塞控制过程，从而造成系统的振荡。In method 2, the discarded data packets by the BTS will also lead to overtime retransmission. The retransmitted data wastes air interface resources and increases the congestion pressure on the ABIS interface. Congestion will continue for a period of time. Moreover, limiting the maximum sending rate of all ATs, or BTS discarding all received packets after congestion, cannot provide differentiated QoS for high-priority users. When BTS starts congestion control, all ATs will reduce the transmission rate at the same time. After the congestion is eliminated, all ATs will increase the transmission rate at the same time, which may cause BTS to frequently start and stop the congestion control process, resulting in system oscillation.

当上层传输协议为类似于UDP或者流媒体协议时，数据包的丢弃不会反馈到发送端，这样，ABIS接口拥塞情况得不到缓解和避免，而且，BTS丢弃的数据不会引起数据重传，从而造成数据丢失，在VOIP、VT等业务中，连续的语音帧或视频帧丢弃，会严重降低服务质量，影响用户感受。When the upper-layer transmission protocol is similar to UDP or streaming media protocol, the discarding of data packets will not be fed back to the sender, so that the congestion of the ABIS interface cannot be alleviated and avoided, and the data discarded by BTS will not cause data retransmission , resulting in data loss. In services such as VOIP and VT, continuous audio frames or video frames are discarded, which will seriously reduce service quality and affect user experience.

总之，上层传输协议无论是类似于UDP或者流媒体协议、还是类似于TCP的协议，都无法避免BTS丢弃数据包的现象，在无线移动应用中，空口资源是比较紧缺的资源，BTS将接收到的数据丢弃，浪费了空口资源。也就是说，在AT的发射功率没有降低，即反向干扰没有降低的情况下，系统实际的吞吐量下降了，从而降低了空口资源的利用率。In short, whether the upper-layer transmission protocol is similar to UDP or streaming media protocol, or a protocol similar to TCP, it cannot avoid the phenomenon of BTS discarding data packets. In wireless mobile applications, air interface resources are relatively scarce resources, and BTS will receive The data is discarded, wasting air interface resources. That is to say, when the transmit power of the AT is not reduced, that is, the reverse interference is not reduced, the actual throughput of the system is reduced, thereby reducing the utilization rate of air interface resources.

发明内容Contents of the invention

本发明的目的在于，提供一种ABIS接口反向拥塞控制方法和收发基站，通过在ABIS接口反向还没有达到拥塞、且即将达到拥塞时，对ABIS接口反向进行拥塞控制处理，有效避免了数据丢包现象，从而提高了空口资源利用率、提高了用户满意度。The object of the present invention is to provide a reverse congestion control method for an ABIS interface and a transceiver base station, by performing congestion control processing on the ABIS interface in the reverse direction when the ABIS interface has not yet reached congestion and is about to reach congestion, effectively avoiding Data packet loss phenomenon, thereby improving the utilization rate of air interface resources and improving user satisfaction.

为达到上述目的，本发明提供的一种ABIS接口反向拥塞控制方法，包括：In order to achieve the above object, a kind of ABIS interface reverse congestion control method provided by the present invention comprises:

a、设置ABIS接口反向预拥塞控制门限；a. Set the reverse pre-congestion control threshold of the ABIS interface;

b、收发基站BTS检测ABIS接口反向拥塞程度；b. The transceiver base station BTS detects the reverse congestion degree of the ABIS interface;

c、BTS在确定ABIS接口反向拥塞程度达到预拥塞控制门限时，对ABIS接口进行拥塞控制处理。c. When the BTS determines that the reverse congestion level of the ABIS interface reaches the pre-congestion control threshold, it performs congestion control processing on the ABIS interface.

所述步骤a中的预拥塞控制门限包括：ABIS接口带宽占用率门限、BTS业务流队列长度门限、BTS业务流缓冲区占用率门限中的一个或多个。The pre-congestion control threshold in step a includes: one or more of: ABIS interface bandwidth occupancy threshold, BTS service flow queue length threshold, BTS service flow buffer occupancy threshold.

预拥塞控制门限包括：ABIS接口带宽占用率门限时，所述步骤b包括：The pre-congestion control threshold includes: when the ABIS interface bandwidth occupancy rate threshold, the step b includes:

BTS检测预定时间间隔内空口反向平均速率，并将空口反向平均速率与ABIS接口带宽的比值确定为ABIS接口反向拥塞程度；The BTS detects the reverse average rate of the air interface within a predetermined time interval, and determines the ratio of the average reverse rate of the air interface to the bandwidth of the ABIS interface as the reverse congestion degree of the ABIS interface;

预拥塞控制门限包括：BTS业务流缓冲区占用率门限时，所述步骤b包括：The pre-congestion control threshold includes: when the BTS service flow buffer occupancy rate threshold, the step b includes:

BTS检测业务流队列长度，并将业务流队列长度与业务流缓冲区长度的比值确定为ABIS接口反向拥塞程度。The BTS detects the service flow queue length, and determines the ratio of the service flow queue length to the service flow buffer length as the reverse congestion level of the ABIS interface.

所述步骤c中对ABIS接口进行拥塞控制处理的步骤具体包括下述步骤中的1个或多个：The step of performing congestion control processing on the ABIS interface in the step c specifically includes one or more of the following steps:

c1、BTS将反向激活指示RAB设置为忙状态或者将RAB的门限设置为预定值，以要求AT降低发送速率；c1. The BTS sets the reverse activation indication RAB to a busy state or sets the threshold of the RAB to a predetermined value to require the AT to reduce the sending rate;

c2、BTS限制AT的接入消息发送频度；c2. The BTS restricts the sending frequency of the AT's access message;

c3、BTS调整预定AT业务流的反向MAC层参数，以要求预定AT降低发送速率。c3. The BTS adjusts the reverse MAC layer parameters of the service flow of the predetermined AT to require the predetermined AT to reduce the sending rate.

当AT为Rev0的AT时，AT根据速率转移矩阵进行发送速率的降速处理；When the AT is the AT of Rev0, the AT performs the deceleration processing of the transmission rate according to the rate transfer matrix;

当AT为RevA的AT时，AT根据反向MAC层算法进行发送速率的降速处理。When the AT is the AT of RevA, the AT performs the deceleration processing of the sending rate according to the reverse MAC layer algorithm.

所述步骤a还包括：设置ABIS接口反向预拥塞控制取消门限，所述反向预拥塞控制取消门限小于预拥塞控制门限；The step a also includes: setting the ABIS interface reverse pre-congestion control cancellation threshold, the reverse pre-congestion control cancellation threshold is smaller than the pre-congestion control threshold;

且所述步骤c还包括：c4、当BTS检测的ABIS接口反向拥塞程度不超过预拥塞控制取消门限时，取消ABIS接口的拥塞控制处理。And the step c further includes: c4. When the reverse congestion degree of the ABIS interface detected by the BTS does not exceed the pre-congestion control cancellation threshold, cancel the congestion control process of the ABIS interface.

所述步骤c4中取消ABIS接口的拥塞控制处理的步骤具体包括下述步骤中的1个或多个：The step of canceling the congestion control processing of the ABIS interface in the step c4 specifically includes one or more of the following steps:

BTS调整预定AT业务流的反向MAC层参数，要求预定AT提高发送速率；The BTS adjusts the reverse MAC layer parameters of the predetermined AT service flow, and requires the predetermined AT to increase the sending rate;

BTS恢复AT的接入消息发送频度；The BTS resumes the sending frequency of the AT's access message;

BTS将RAB设置为正常状态或者将RAB的门限设置为第二预定值，以要求AT提高发送速率。The BTS sets the RAB to a normal state or sets the threshold of the RAB to a second predetermined value, so as to require the AT to increase the sending rate.

本发明还提供一种收发基站，包括：所述收发基站中设置有存储模块、检测模块和拥塞控制处理模块；存储模块：存储有ABIS接口反向预拥塞控制门限；检测模块：检测ABIS接口反向拥塞程度，并输出检测结果；The present invention also provides a transceiver base station, comprising: the transceiver base station is provided with a storage module, a detection module and a congestion control processing module; the storage module: stores the reverse pre-congestion control threshold of the ABIS interface; To the degree of congestion, and output the detection results;

拥塞控制处理模块：在确定检测模块输出的ABIS接口反向拥塞程度达到存储模块中存储的预拥塞控制门限时，对ABIS接口进行拥塞控制处理。Congestion control processing module: when it is determined that the reverse congestion degree of the ABIS interface output by the detection module reaches the pre-congestion control threshold stored in the storage module, perform congestion control processing on the ABIS interface.

所述拥塞控制处理模块中包括：判断子模块和拥塞控制处理子模块；The congestion control processing module includes: a judging submodule and a congestion control processing submodule;

判断子模块：在确定检测模块输出的ABIS接口反向拥塞程度达到存储模块中存储的ABIS接口反向预拥塞控制门限时，通知拥塞控制处理子模块进行拥塞控制处理；Judgment sub-module: when it is determined that the ABIS interface reverse congestion degree output by the detection module reaches the ABIS interface reverse pre-congestion control threshold stored in the storage module, notify the congestion control processing sub-module to perform congestion control processing;

拥塞控制处理子模块：在接收到拥塞控制处理通知时，ABIS接口进行拥塞控制处理，所述拥塞控制处理包括下述步骤中的一个或多个：Congestion control processing submodule: when receiving the congestion control processing notification, the ABIS interface performs congestion control processing, and the congestion control processing includes one or more of the following steps:

将RAB设置为忙状态或者将RAB的门限设置为预定值，以要求AT降低发送速率；限制AT的接入消息发送频度；调整预定AT业务流的反向MAC层参数，以要求预定AT降低发送速率。Set the RAB to a busy state or set the threshold of the RAB to a predetermined value to require the AT to reduce the transmission rate; limit the frequency of the AT's access message transmission; adjust the reverse MAC layer parameters of the predetermined AT business flow to require the predetermined AT to reduce sending rate.

所述拥塞控制处理模块中还设置有拥塞控制取消子模块；The congestion control processing module is also provided with a congestion control canceling submodule;

判断子模块在通知拥塞控制处理子模块进行拥塞控制处理后，又确定检测模块输出的ABIS接口反向拥塞程度不超过存储模块中存储的ABIS接口反向预拥塞控制取消门限时，通知拥塞控制取消子模块取消拥塞控制处理；After the judging sub-module notifies the congestion control processing sub-module to perform congestion control processing, and determines that the ABIS interface reverse congestion degree output by the detection module does not exceed the ABIS interface reverse pre-congestion control cancellation threshold stored in the storage module, it notifies the congestion control cancellation The sub-module cancels the congestion control processing;

拥塞控制取消子模块：在接收到判决子模块输出的拥塞控制取消通知后，对ABIS接口进行拥塞控制取消处理；Congestion control cancellation sub-module: After receiving the congestion control cancellation notification output by the judgment sub-module, perform congestion control cancellation processing on the ABIS interface;

所述存储模块中存储的ABIS接口反向预拥塞控制取消门限小于预拥塞控制门限。The ABIS interface reverse pre-congestion control cancellation threshold stored in the storage module is smaller than the pre-congestion control threshold.

通过上述技术方案的描述可知，通过设置预拥塞控制门限，并检测ABIS接口反向拥塞程度，使BTS能够在ABIS接口反向还没有达到拥塞、且即将达到拥塞时，对ABIS接口反向进行拥塞控制处理，有效避免了数据丢包现象，从而有效避免了由于数据丢包引起的影响ABIS接口的数据传输性能、重传的数据浪费空口资源、重传的数据增加ABIS接口的拥塞压力、用户满意度差等问题；本发明通过采用设置RAB为忙状态、限制AT的接入消息的发送频度、调整优先级低的AT业务流的反向MAC层参数等方法来限制AT的发送速率，使BTS能够为不同优先级的AT业务提供区别服务，保证了高优先级业务的服务质量；通过设置小于预拥塞控制门限的预拥塞控制取消门限，避免了BTS频繁启动、停止拥塞控制处理的现象，有效避免了系统振荡；从而通过本发明提供的技术方案实现了提高空口资源利用率、提高用户满意度、提高服务质量可实现性的目的。From the description of the above technical solution, it can be seen that by setting the pre-congestion control threshold and detecting the reverse congestion degree of the ABIS interface, the BTS can reverse the congestion of the ABIS interface when the ABIS interface has not yet reached congestion and is about to reach congestion Control processing effectively avoids the data packet loss phenomenon, thereby effectively avoiding the data transmission performance of the ABIS interface caused by data packet loss, the retransmitted data wastes air interface resources, and the retransmitted data increases the congestion pressure of the ABIS interface. User satisfaction problems such as poor speed; the present invention limits the sending rate of the AT by adopting methods such as setting the RAB as a busy state, limiting the sending frequency of the access message of the AT, and adjusting the reverse MAC layer parameters of the AT service flow with low priority, so that BTS can provide differentiated services for AT services with different priorities, ensuring the service quality of high-priority services; by setting the pre-congestion control cancellation threshold smaller than the pre-congestion control threshold, the phenomenon of BTS frequently starting and stopping congestion control processing is avoided. The system vibration is effectively avoided; thus, through the technical solution provided by the present invention, the objectives of improving the utilization rate of air interface resources, improving user satisfaction, and improving the realizability of service quality are realized.

附图说明Description of drawings

图1是AT->BTS->BSC的反向数据流向示意图；Figure 1 is a schematic diagram of the reverse data flow of AT->BTS->BSC;

图2是本发明的收发基站示意图。Fig. 2 is a schematic diagram of a transceiver base station of the present invention.

具体实施方式Detailed ways

如果在ABIS接口反向还没有达到拥塞、且即将达到拥塞时，对ABIS接口反向进行拥塞控制处理，即提前对ABIS接口反向进行拥塞控制处理，则能够有效避免了数据丢包现象，从而能够避免因数据丢包而引起的浪费空口资源、用户满意度差等种种缺陷。If the reverse congestion control process is performed on the ABIS interface when the reverse direction of the ABIS interface has not yet reached congestion and is about to reach congestion, that is, the reverse congestion control process is performed on the ABIS interface in advance, which can effectively avoid data packet loss, thereby Various defects such as waste of air interface resources and poor user satisfaction caused by data packet loss can be avoided.

因此，本发明的核心是：设置ABIS接口反向预拥塞控制门限，收发基站BTS检测ABIS接口反向拥塞程度，BTS在确定ABIS接口反向拥塞程度超过预拥塞控制门限时，对ABIS接口进行拥塞控制处理。Therefore, the core of the present invention is: the reverse pre-congestion control threshold of the ABIS interface is set; control processing.

本发明首先需要为ABIS接口反向设置预拥塞控制门限，预拥塞控制门限应当保证在ABIS接口的拥塞程度达到预拥塞控制门限时，ABIS接口反向还没有达到拥塞，也就是说，当ABIS接口的拥塞程度达到预拥塞控制门限时，BTS还不会进行数据丢包处理。The present invention first needs to reversely set the pre-congestion control threshold for the ABIS interface. The pre-congestion control threshold should ensure that when the congestion level of the ABIS interface reaches the pre-congestion control threshold, the ABIS interface has not yet reached congestion in the reverse direction. That is to say, when the ABIS interface When the congestion level reaches the pre-congestion control threshold, the BTS will not perform data packet loss processing.

预拥塞控制门限的设置与BTS检测ABIS接口反向拥塞程度的方法相对应，如当预拥塞控制门限设置为ABIS接口带宽占用率门限时，BTS需要检测ABIS接口带宽占用率；当预拥塞控制门限设置为BTS业务流队列长度门限时，BTS需要检测BTS业务流队列长度；当预拥塞控制门限设置为BTS业务流缓冲区占用率门限时，BTS需要检测BTS业务流缓冲区占用率。本发明中的预拥塞控制门限可以同时包括上述门限中的一个或多个，当预拥塞控制门限包括上述门限中的多个时，BTS的检测过程也应该包括对应的多个。The setting of the pre-congestion control threshold corresponds to the method used by the BTS to detect the reverse congestion degree of the ABIS interface. For example, when the pre-congestion control threshold is set to the bandwidth occupancy rate threshold of the ABIS interface, the BTS needs to detect the bandwidth occupancy rate of the ABIS interface; When it is set to the BTS service flow queue length threshold, the BTS needs to detect the BTS service flow queue length; when the pre-congestion control threshold is set to the BTS service flow buffer occupancy rate threshold, the BTS needs to detect the BTS service flow buffer occupancy rate. The pre-congestion control threshold in the present invention may include one or more of the above-mentioned thresholds at the same time. When the pre-congestion control threshold includes multiple of the above-mentioned thresholds, the detection process of the BTS should also include corresponding multiples.

当BTS确定其检测到的ABIS接口反向拥塞程度达到预拥塞控制门限时，应采用降低AT的发送速率等方法对ABIS接口反向进行拥塞控制处理，使ABIS接口反向拥塞程度低于预拥塞控制门限。为避免BTS频繁的启动、停止拥塞控制过程，避免系统的振荡，本发明还设置有ABIS接口反向预拥塞控制取消门限，而且，反向预拥塞控制取消门限的取值应小于预拥塞控制门限的取值。在BTS对ABIS接口反向进行拥塞控制处理过程中，如果BTS检测到ABIS接口的反向拥塞程度不超过反向预拥塞控制取消门限，则BTS应取消反向拥塞控制处理过程。When the BTS determines that the reverse congestion level of the detected ABIS interface reaches the pre-congestion control threshold, it should use methods such as reducing the transmission rate of the AT to perform reverse congestion control processing on the ABIS interface, so that the reverse congestion level of the ABIS interface is lower than the pre-congestion level. control threshold. For avoiding BTS frequent start, stop congestion control process, avoid system oscillation, the present invention is also provided with ABIS interface reverse pre-congestion control cancellation threshold, and the value of reverse pre-congestion control cancellation threshold should be less than pre-congestion control threshold value of . During the reverse congestion control process of the ABIS interface, if the BTS detects that the reverse congestion level of the ABIS interface does not exceed the reverse pre-congestion control cancellation threshold, the BTS shall cancel the reverse congestion control process.

降低AT的发送速率的方法如将RAB(反向激活指示)设置为忙状态、将RAB的门限设置为预定值如最小值，限制AT的接入消息发送频度、调整预定AT业务流的反向MAC层参数等。本发明可以采用上述任何一种方法来降低AT的发送速率，也可以在采用其中一种降低AT的发送速率的方法没有使ABIS接口的反向拥塞程度不超过反向预拥塞控制取消门限时，再采用其中另外的一种方法来继续降低AT的发送速率，在先后采用上述两种方法仍然没有使ABIS接口的反向拥塞程度不超过反向预拥塞控制取消门限时，可以再采用第三种方法来降低AT的发送速率。本发明可以先采用将RAB设置为忙状态、将RAB的门限设置为预定值如最小值的方法，在采用该方法没有达到目的时，再采用限制AT的接入消息发送频度的方法，如果仍然没有达到目的，再采用调整预定AT业务流的反向MAC层参数的方法。The method of reducing the sending rate of AT is, for example, setting the RAB (Reverse Activation Indicator) to the busy state, setting the threshold of RAB to a predetermined value such as the minimum value, limiting the frequency of sending AT access messages, and adjusting the reaction rate of the predetermined AT service flow. To the MAC layer parameters, etc. The present invention can use any one of the above methods to reduce the transmission rate of the AT, or when one of the methods for reducing the transmission rate of the AT does not make the reverse congestion degree of the ABIS interface not exceed the reverse pre-congestion control cancellation threshold, Then use another method to continue to reduce the transmission rate of AT. When the above two methods are adopted successively and the reverse congestion degree of the ABIS interface does not exceed the reverse pre-congestion control cancellation threshold, the third method can be used. method to reduce the sending rate of AT. The present invention can first adopt the method of setting the RAB to a busy state and setting the threshold of the RAB to a predetermined value such as a minimum value. When the method fails to achieve the purpose, the method of limiting the sending frequency of the AT's access message is adopted. If If the goal is still not achieved, the method of adjusting the reverse MAC layer parameters of the predetermined AT service flow is adopted.

下面对本发明的ABIS接口反向拥塞控制方法进行详细描述。The ABIS interface reverse congestion control method of the present invention will be described in detail below.

本发明提供三种度量ABIS接口反向拥塞程度的方法。The invention provides three methods for measuring the degree of reverse congestion of the ABIS interface.

方法一：检测ABIS接口带宽占用率。Method 1: Detect the bandwidth usage of the ABIS interface.

设定BTS的检测周期为T，在这个周期内，空口反向平均速率Rairave应该为检测周期T内BTS从空口接收的所有数据量与检测周期T的比值。设定ABIS接口带宽为Rabis，则ABIS接口带宽占用率＝Rairave/Rabis。本发明可以根据网络的实际情况来设置检测周期T，ABIS接口带宽占用率应该在0～1之间，而且，ABIS接口带宽占用率越接近于1，说明ABIS接口反向越接近于拥塞。预拥塞控制门限即ABIS接口带宽占用率门限应小于1。Set the detection period of the BTS as T. In this period, the air interface reverse average rate Rairave should be the ratio of all data received by the BTS from the air interface within the detection period T to the detection period T. If the ABIS interface bandwidth is set to Rabis, then the ABIS interface bandwidth occupancy rate=Rairave/Rabis. The present invention can set the detection cycle T according to the actual situation of the network, and the bandwidth occupancy rate of the ABIS interface should be between 0 and 1, and the closer the bandwidth occupancy rate of the ABIS interface is to 1, it means that the reverse direction of the ABIS interface is closer to congestion. The pre-congestion control threshold, that is, the bandwidth occupancy threshold of the ABIS interface, should be less than 1.

瞬时的空口反向速率超过ABIS接口带宽是可以的，但是，空口反向平均速率Rairave不能超过ABIS接口带宽Rabis，即空口反向速率不能在较长时间段内持续超过ABIS接口带宽Rabis。It is possible for the instantaneous air interface reverse rate to exceed the ABIS interface bandwidth, but the air interface reverse average rate Rairave cannot exceed the ABIS interface bandwidth Rabis, that is, the air interface reverse rate cannot continue to exceed the ABIS interface bandwidth Rabis for a long period of time.

方法二、检测BTS业务流队列长度。Method 2: Detect the length of the BTS service flow queue.

如果BTS调度时间可以忽略的话，BTS中任何业务流队列的溢出，都说明ABIS接口反向出现拥塞，所以，采用检测BTS业务流队列长度可以作为检测ABIS接口反向拥塞程度的度量。BTS业务流队列长度越接近于业务流缓冲区的长度，说明ABIS接口反向越接近于拥塞。预拥塞控制门限即BTS业务流队列长度门限应小于业务流缓冲区的长度。If the BTS scheduling time can be ignored, any traffic queue overflow in the BTS indicates reverse congestion on the ABIS interface. Therefore, detecting the length of the BTS traffic queue can be used as a measure to detect the reverse congestion degree of the ABIS interface. The closer the BTS service flow queue length is to the service flow buffer length, the closer the reverse ABIS interface is to congestion. The pre-congestion control threshold, that is, the BTS service flow queue length threshold, should be smaller than the service flow buffer length.

方法三、检测BTS业务流缓冲区占用率。Method 3: Detect the buffer occupancy rate of the BTS service flow.

由于BTS中各业务流的缓冲区的长度可能存在差异，所以，各业务流对应的门限值可能存在差异，为方便BTS对预拥塞的判决过程，本发明可以为业务流定义BTS业务流缓冲区占用率，BTS业务流缓冲区占用率＝BTS业务流队列长度/BTS业务流缓冲区长度。这样，各业务流队列对应的BTS业务流缓冲区占用率门限值可以统一。BTS业务流缓冲区占用率应该在0～1之间，BTS业务流缓冲区占用率越接近于1，说明ABIS接口反向越接近于拥塞。预拥塞控制门限即BTS业务流缓冲区占用率门限应小于1。Since there may be differences in the buffer lengths of each service flow in the BTS, there may be differences in the threshold values corresponding to each service flow. In order to facilitate the BTS to judge the pre-congestion process, the present invention can define the BTS service flow buffer for the service flow Area occupancy rate, BTS service flow buffer occupancy rate = BTS service flow queue length/BTS service flow buffer length. In this way, the threshold value of the occupancy rate of the BTS service flow buffer corresponding to each service flow queue can be unified. The BTS traffic buffer occupancy rate should be between 0 and 1. The closer the BTS traffic buffer occupancy rate is to 1, the closer the ABIS interface is to congested in the reverse direction. The pre-congestion control threshold, that is, the buffer occupancy threshold of the BTS service flow, should be less than 1.

在利用上述检测过程进行拥塞程度检测，并触发拥塞控制处理过程后，到拥塞控制发生作用的这段时间称为反映时间，在反映时间内，BTS应使业务流队列长度不再增加。After the above detection process is used to detect the congestion level and trigger the congestion control process, the period until the congestion control takes effect is called the reflection time. During the reflection time, the BTS should stop increasing the length of the traffic queue.

如果BTS业务流缓冲区较小，在反映时间内空口数据可以将其充满，或者在反映时间内充满的缓冲区数据可以发送完毕，则不适合用第二和第三种方法来衡量ABIS接口拥塞程度，也就是说，如果BTS中并发的业务流很多，而每个业务流的缓冲区长度较小，则应该选择第一种方法来检测ABIS接口反向拥塞程度，否则，可以选择第二种和第三种方法来检测ABIS接口反向拥塞程度。If the BTS service flow buffer is small, the air interface data can fill it within the reflection time, or the full buffer data can be sent within the reflection time, then it is not suitable to use the second and third methods to measure the ABIS interface congestion That is to say, if there are many concurrent service flows in the BTS, and the buffer length of each service flow is small, you should choose the first method to detect the reverse congestion degree of the ABIS interface, otherwise, you can choose the second method And the third method to detect the reverse congestion degree of the ABIS interface.

下面以ABIS接口带宽占用率、BTS流缓冲区占用率为例，对本发明的ABIS接口反向拥塞控制的算法，即ABIS接口反向拥塞控制过程进行说明。Taking the bandwidth occupancy rate of the ABIS interface and the occupancy rate of the BTS stream buffer as examples, the algorithm of the reverse congestion control of the ABIS interface of the present invention, that is, the reverse congestion control process of the ABIS interface will be described.

设定ABIS接口带宽占用率和BTS流缓冲区占用率对应的预拥塞控制门限值均为AbisOverFlowThresh，ABIS接口带宽占用率和BTS流缓冲区占用率对应的预拥塞控制取消门限值均为AbisStableThresh。这里的AbisStableThresh应小于AbisOverFlowThresh。Set the pre-congestion control thresholds corresponding to the bandwidth occupancy rate of the ABIS interface and the occupancy rate of the BTS flow buffer to AbisOverFlowThresh, and the corresponding pre-congestion control cancellation thresholds to the bandwidth occupancy rate of the ABIS interface and the occupancy rate of the BTS flow buffer to AbisStableThresh . AbisStableThresh here should be smaller than AbisOverFlowThresh.

当ABIS接口带宽占用率或者BTS流缓冲区占用率超过AbisOverFlowThresh时，BTS触发ABIS接口反向拥塞控制过程，限制空口反向发送速率。When the bandwidth occupancy rate of the ABIS interface or the occupancy rate of the BTS flow buffer exceeds AbisOverFlowThresh, the BTS triggers the reverse congestion control process of the ABIS interface to limit the reverse transmission rate of the air interface.

在ABIS接口反向拥塞控制过程中，如果BTS检测到ABIS接口带宽占用率或者BTS业务流缓冲区占用率低于AbisStableThresh时，取消拥塞控制过程，从而，在充分利用ABIS接口带宽的情况下，避免了BTS反复启动、停止拥塞控制过程的现象。During the reverse congestion control process of the ABIS interface, if the BTS detects that the bandwidth occupancy rate of the ABIS interface or the buffer occupancy rate of the BTS service flow is lower than AbisStableThresh, the congestion control process is canceled. The phenomenon that the BTS starts and stops the congestion control process repeatedly.

ABIS接口反向拥塞控制过程可以分为下列几个步骤进行：The reverse congestion control process of the ABIS interface can be divided into the following steps:

步骤1、当BTS检测到ABIS接口反向拥塞程度超过AbisOverFlowThresh，也就是说，当触发ABIS接口反向拥塞控制时，首先需要调整扇区的RAB，将RAB设置为“busy”，来要求AT降低发送速率。RAB是扇区级参数，对扇区下所有AT都起作用。基于Rev0(protocol reversion 0，协议版本0)的AT根据速率转移矩阵进行发送速率的降速处理；基于RevA(protocol reversion A，协议版本A)的AT根据反向MAC层算法进行发送速率的降速处理。本发明可以通过对不同的AT、不同的业务流设置不同的状态转移矩阵或者反向MAC层参数，来实现控制不同优先级的业务降低发送速率的幅度，从而能够为高优先级业务提供区别服务特征，保证了高优先级业务的服务质量。Step 1. When the BTS detects that the reverse congestion level of the ABIS interface exceeds AbisOverFlowThresh, that is, when the reverse congestion control of the ABIS interface is triggered, it first needs to adjust the RAB of the sector and set the RAB to "busy" to require the AT to reduce sending rate. RAB is a sector-level parameter, which works for all ATs under the sector. The AT based on Rev0 (protocol revision 0, protocol version 0) performs the deceleration processing of the transmission rate according to the rate transition matrix; the AT based on RevA (protocol revision A, protocol version A) decelerates the transmission rate according to the reverse MAC layer algorithm deal with. The present invention can control different priority services by setting different state transition matrices or reverse MAC layer parameters for different ATs and different service flows, so as to provide differentiated services for high priority services Features, to ensure the service quality of high-priority business.

当BTS取消拥塞控制处理过程时，BTS根据空口反向负荷来设置RAB，即如果空口反向负荷不高，则RAB被设置为“no busy”，于是，该扇区下所有AT恢复其发射功率和数据发送速率。When the BTS cancels the congestion control process, the BTS sets the RAB according to the reverse load of the air interface, that is, if the reverse load of the air interface is not high, the RAB is set to "no busy", so all ATs in this sector resume their transmit power and data transmission rate.

当ABIS接口不能直接设置RAB的值时，可以通过设置RAB的门限来限制该扇区下AT的发送速率，即在启动ABIS接口反向拥塞控制处理过程时，将RAB的门限值设置为最小值，这样，ROT(底噪提升，rise overthermal)很容易超过这个门限，从而使BTS将RAB设置为“busy”。同样，当BTS取消拥塞控制处理过程时，可以通过恢复RAB的门限值，使BTS根据反向ROT(Rise OverThermal)来设置RAB的值，将RAB设置为“no busy”。When the ABIS interface cannot directly set the RAB value, you can set the RAB threshold to limit the transmission rate of AT in this sector, that is, set the RAB threshold to the minimum when starting the ABIS interface reverse congestion control process In this way, the ROT (rise overthermal) can easily exceed this threshold, so that the BTS sets the RAB to "busy". Similarly, when the BTS cancels the congestion control process, the threshold value of the RAB can be restored, so that the BTS can set the value of the RAB according to the reverse ROT (Rise OverThermal), and set the RAB to "no busy".

在采用步骤1中的方法不能使BTS检测到的ABIS接口反向拥塞程度不超过AbisStableThresh时，需要到步骤2。When the method in step 1 cannot make the reverse congestion degree of the ABIS interface detected by the BTS not exceed AbisStableThresh, go to step 2.

步骤2、如果大量AT同时进行登记、发起会话请求或者连接请求，大量的接入消息也会对ABIS接口反向业务流量造成冲击，如在系统升级、举行活动、早晨开机等时候，会对ABIS接口反向业务流量造成冲击。这样，在对ABIS接口进行拥塞控制处理时，还需要适当限制AT的接入消息发送频度，以保证高优先级AT的接入。Step 2. If a large number of ATs register, initiate session requests or connect requests at the same time, a large number of access messages will also have an impact on the reverse service traffic of the ABIS interface. The reverse service traffic on the interface causes an impact. In this way, when performing congestion control processing on the ABIS interface, it is also necessary to properly limit the sending frequency of AT access messages to ensure the access of high-priority ATs.

在采用步骤1和步骤2中的方法能够使BTS检测到的ABIS接口反向拥塞程度不超过AbisStableThresh时，需要首先取消AT接入消息发送频度的限制，然后，再恢复RAB的设置。When using the method in step 1 and step 2 to make the ABIS interface reverse congestion level detected by BTS not exceed AbisStableThresh, it is necessary to first cancel the restriction on the frequency of sending AT access messages, and then restore the RAB settings.

在采用步骤1和步骤2中的方法仍然不能使BTS检测到的ABIS接口反向拥塞程度不超过AbisStableThresh时，需要到步骤3。When the methods in steps 1 and 2 still cannot make the ABIS interface reverse congestion level detected by the BTS not exceed AbisStableThresh, go to step 3.

步骤3、如果当前激活的业务流的优先级都比较高，通过设置RAB和限制AT接入消息发送频度使ABIS接口反向拥塞程度仍然超过AbisStableThresh时，则需要有选择性的调节部分业务流的反向MAC层参数，以降低部分AT的发射功率，从而降低相应的业务流的发送速率。Step 3. If the priority of the currently activated service flows is relatively high, and the reverse congestion degree of the ABIS interface still exceeds AbisStableThresh by setting RAB and restricting the frequency of sending AT access messages, it is necessary to selectively adjust some service flows The parameters of the reverse MAC layer are used to reduce the transmit power of some ATs, thereby reducing the transmission rate of the corresponding service flow.

本发明可以针对业务流缓冲区占用率最大的部分业务流，启动拥塞控制处理过程。具体方法为：由AN发起与AT针对预定业务流的参数协商过程，通过降低AT的T2PInFlow等参数，来限制AT的发射功率。The present invention can start the congestion control processing process for the part of the service flow with the largest occupancy rate of the service flow buffer. The specific method is: the AN initiates a parameter negotiation process with the AT for a predetermined service flow, and limits the transmit power of the AT by reducing parameters such as T2PInFlow of the AT.

由于BTS通过ABIS接口发送数据时，是根据各个业务流的优先级进行调度的，所以，业务流缓冲区占用率最大的业务流也是优先级较低的业务流，因此，该方法可以降低优先级低的AT的发射功率，从而保证优先级高的AT具有较高的发射功率，保证优先级高的AT的服务质量。When the BTS sends data through the ABIS interface, it is scheduled according to the priority of each service flow, so the service flow with the largest buffer occupancy rate of the service flow is also a service flow with a lower priority. Therefore, this method can reduce the priority The transmission power of the AT is low, thereby ensuring that the AT with a high priority has a high transmission power, and ensuring the service quality of the AT with a high priority.

在采用步骤1、步骤2和步骤3中的方法使BTS检测到的ABIS接口反向拥塞程度不超过AbisStableThresh时，首先需要恢复AT的反向MAC层参数设置，然后，再取消AT接入消息发送频度的限制，最后，再恢复RAB的设置。When the method in step 1, step 2 and step 3 is used to make the ABIS interface reverse congestion level detected by the BTS not exceed AbisStableThresh, it is first necessary to restore the reverse MAC layer parameter settings of the AT, and then cancel the sending of the AT access message Frequency limitation, and finally, restore the RAB settings.

本发明提供的BTS主要包括：存储模块、检测模块和拥塞控制处理模块。The BTS provided by the present invention mainly includes: a storage module, a detection module and a congestion control processing module.

存储模块主要用于存储ABIS接口反向预拥塞控制门限，这里的ABIS接口反向预拥塞控制门限可以为ABIS接口带宽占用率门限、BTS业务流队列长度门限、BTS业务流缓冲区占用率门限中的一个或多个。The storage module is mainly used to store the reverse pre-congestion control threshold of the ABIS interface. Here, the reverse pre-congestion control threshold of the ABIS interface can be the bandwidth occupancy threshold of the ABIS interface, the BTS service flow queue length threshold, and the BTS service flow buffer occupancy rate threshold. one or more of .

存储模块中还可以存储有ABIS接口反向预拥塞控制取消门限，ABIS接口反向预拥塞控制取消门限应小于ABIS接口反向预拥塞控制门限。ABIS接口反向预拥塞控制取消门限也可以包括多种，分别与上述各种ABIS接口反向预拥塞控制门限对应。The storage module may also store an ABIS interface reverse pre-congestion control cancellation threshold, and the ABIS interface reverse pre-congestion control cancellation threshold should be smaller than the ABIS interface reverse pre-congestion control threshold. The ABIS interface reverse pre-congestion control cancellation threshold may also include multiple types, corresponding to the above-mentioned various ABIS interface reverse pre-congestion control thresholds.

检测模块应根据存储模块中存储的门限来检测ABIS接口反向预拥塞的程度，如检测ABIS接口带宽占用率、BTS业务流队列长度、BTS业务流缓冲区占用率等。具体的检测方法如上述方法中的描述。The detection module should detect the degree of reverse pre-congestion of the ABIS interface according to the threshold stored in the storage module, such as detecting the bandwidth occupancy rate of the ABIS interface, the length of the BTS service flow queue, and the occupancy rate of the BTS service flow buffer. The specific detection method is as described in the above method.

拥塞控制处理模块主要用于在确定检测模块输出的ABIS接口反向拥塞程度达到存储模块中存储的预拥塞控制门限时，对ABIS接口进行拥塞控制处理，在拥塞控制处理过程中，在确定检测模块输出的ABIS接口反向拥塞程度不超过存储模块中存储的预拥塞控制取消门限时，取消ABIS接口的拥塞控制处理。The congestion control processing module is mainly used to perform congestion control processing on the ABIS interface when the reverse congestion degree of the ABIS interface output by the detection module reaches the pre-congestion control threshold stored in the storage module. When the output reverse congestion level of the ABIS interface does not exceed the pre-congestion control cancellation threshold stored in the storage module, cancel the congestion control processing of the ABIS interface.

拥塞控制处理模块的主要功能由判断子模块、拥塞控制处理子模块和拥塞控制取消子模块来实现。The main functions of the congestion control processing module are realized by the judging sub-module, the congestion control processing sub-module and the congestion control canceling sub-module.

判断子模块主要用于在确定检测模块输出的ABIS接口反向拥塞程度达到存储模块中存储的ABIS接口反向预拥塞控制门限时，通知拥塞控制处理子模块进行拥塞控制处理；在通知拥塞控制处理子模块进行拥塞控制处理后，又确定检测模块输出的ABIS接口反向拥塞程度不超过存储模块中存储的ABIS接口反向预拥塞控制取消门限时，通知拥塞控制取消子模块取消拥塞控制处理。The judging sub-module is mainly used to notify the congestion control processing sub-module to perform congestion control processing when the ABIS interface reverse congestion degree output by the detection module reaches the ABIS interface reverse pre-congestion control threshold stored in the storage module; After the sub-module performs congestion control processing, and determines that the ABIS interface reverse congestion degree output by the detection module does not exceed the ABIS interface reverse pre-congestion control cancellation threshold stored in the storage module, it notifies the congestion control cancellation sub-module to cancel the congestion control process.

拥塞控制处理子模块在接收到拥塞控制处理通知时，ABIS接口进行拥塞控制处理，具体的拥塞控制处理可以为将RAB设置为忙状态或者将RAB的门限设置为预定值，以要求AT降低发送速率；限制AT的接入消息发送频度；调整预定AT业务流的反向MAC层参数，以要求预定AT降低发送速率等。具体的拥塞控制处理过程的先后顺序等如上述方法中的描述。When the congestion control processing sub-module receives the congestion control processing notification, the ABIS interface performs congestion control processing. The specific congestion control processing can be setting the RAB to a busy state or setting the threshold of the RAB to a predetermined value to require the AT to reduce the sending rate ; Restrict the sending frequency of the AT's access message; adjust the reverse MAC layer parameters of the predetermined AT service flow, so as to require the predetermined AT to reduce the sending rate, etc. The sequence of the specific congestion control process is as described in the above method.

拥塞控制取消子模块在接收到判断子模块传输来的取消拥塞控制处理的通知时，对ABIS接口进行拥塞控制取消处理。具体的取消拥塞控制处理的先后顺序等如上述方法中的描述。When the congestion control canceling sub-module receives the notification of canceling the congestion control processing transmitted by the judging sub-module, it performs the congestion control canceling process on the ABIS interface. The specific sequence of canceling the congestion control processing is as described in the above method.

虽然通过实施例描绘了本发明，本领域普通技术人员知道，本发明有许多变形和变化而不脱离本发明的精神，本发明的申请文件的权利要求包括这些变形和变化。Although the present invention has been described by way of example, those of ordinary skill in the art know that there are many variations and changes in the present invention without departing from the spirit of the invention, and the claims of the application document of the present invention include these variations and changes.

Claims (10)

1、一种ABIS接口反向拥塞控制方法，其特征在于，包括：1, a kind of ABIS interface reverse congestion control method, it is characterized in that, comprising: a、设置ABIS接口反向预拥塞控制门限；a. Set the reverse pre-congestion control threshold of the ABIS interface; b、收发基站BTS检测ABIS接口反向拥塞程度；b. The transceiver base station BTS detects the reverse congestion degree of the ABIS interface; c、BTS在确定ABIS接口反向拥塞程度达到预拥塞控制门限时，对ABIS接口进行拥塞控制处理。c. When the BTS determines that the reverse congestion level of the ABIS interface reaches the pre-congestion control threshold, it performs congestion control processing on the ABIS interface. 2、如权利要求1所述的一种ABIS接口反向拥塞控制方法，其特征在于，所述步骤a中的预拥塞控制门限包括：ABIS接口带宽占用率门限、BTS业务流队列长度门限、BTS业务流缓冲区占用率门限中的一个或多个。2. The reverse congestion control method of an ABIS interface according to claim 1, wherein the pre-congestion control threshold in said step a comprises: ABIS interface bandwidth occupancy rate threshold, BTS service flow queue length threshold, BTS One or more of the service flow buffer occupancy thresholds. 3、如权利要求2所述的一种ABIS接口反向拥塞控制方法，其特征在于：3, a kind of ABIS interface reverse congestion control method as claimed in claim 2, is characterized in that: 预拥塞控制门限包括：ABIS接口带宽占用率门限时，所述步骤b包括：The pre-congestion control threshold includes: when the ABIS interface bandwidth occupancy rate threshold, the step b includes: BTS检测预定时间间隔内空口反向平均速率，并将空口反向平均速率与ABIS接口带宽的比值确定为ABIS接口反向拥塞程度；The BTS detects the reverse average rate of the air interface within a predetermined time interval, and determines the ratio of the average reverse rate of the air interface to the bandwidth of the ABIS interface as the reverse congestion degree of the ABIS interface; 预拥塞控制门限包括：BTS业务流缓冲区占用率门限时，所述步骤b包括：The pre-congestion control threshold includes: when the BTS service flow buffer occupancy rate threshold, the step b includes: BTS检测业务流队列长度，并将业务流队列长度与业务流缓冲区长度的比值确定为ABIS接口反向拥塞程度。The BTS detects the service flow queue length, and determines the ratio of the service flow queue length to the service flow buffer length as the reverse congestion level of the ABIS interface. 4、如权利要求1所述的一种ABIS接口反向拥塞控制方法，其特征在于，所述步骤c中对ABIS接口进行拥塞控制处理的步骤具体包括下述步骤中的1个或多个：4. An ABIS interface reverse congestion control method according to claim 1, characterized in that the step of performing congestion control processing on the ABIS interface in the step c specifically includes one or more of the following steps: c1、BTS将反向激活指示RAB设置为忙状态或者将RAB的门限设置为预定值，以要求AT降低发送速率；c1. The BTS sets the reverse activation indication RAB to a busy state or sets the threshold of the RAB to a predetermined value to require the AT to reduce the sending rate; c2、BTS限制接入终端AT的接入消息发送频度；c2. The BTS restricts the frequency of sending access messages of the access terminal AT; c3、BTS调整预定AT业务流的反向MAC层参数，以要求预定AT降低发送速率。c3. The BTS adjusts the reverse MAC layer parameters of the service flow of the predetermined AT to require the predetermined AT to reduce the sending rate. 5、如权利要求4所述的一种ABIS接口反向拥塞控制方法，其特征在于：5. A method for reverse congestion control of an ABIS interface as claimed in claim 4, characterized in that: 当AT为RevO的AT时，AT根据速率转移矩阵进行发送速率的降速处理；When the AT is the AT of RevO, the AT performs the deceleration processing of the transmission rate according to the rate transfer matrix; 当AT为RevA的AT时，AT根据反向MAC层算法进行发送速率的降速处理。When the AT is the AT of RevA, the AT performs the deceleration processing of the sending rate according to the reverse MAC layer algorithm. 6、如权利要求1至5中任一权利要求所述的一种ABIS接口反向拥塞控制方法，其特征在于，所述步骤a还包括：6. An ABIS interface reverse congestion control method according to any one of claims 1 to 5, characterized in that said step a further comprises: 设置ABIS接口反向预拥塞控制取消门限，所述反向预拥塞控制取消门限小于预拥塞控制门限；Setting the ABIS interface reverse pre-congestion control cancellation threshold, the reverse pre-congestion control cancellation threshold is less than the pre-congestion control threshold; 且所述步骤c还包括：And the step c also includes: c4、当BTS检测的ABIS接口反向拥塞程度不超过预拥塞控制取消门限时，取消ABIS接口的拥塞控制处理。c4. When the reverse congestion level of the ABIS interface detected by the BTS does not exceed the pre-congestion control cancellation threshold, cancel the congestion control process of the ABIS interface. 7、如权利要求6所述的一种ABIS接口反向拥塞控制方法，其特征在于，所述步骤c4中取消ABIS接口的拥塞控制处理的步骤具体包括下述步骤中的1个或多个：7. An ABIS interface reverse congestion control method according to claim 6, characterized in that the step of canceling the congestion control processing of the ABIS interface in step c4 specifically includes one or more of the following steps: BTS调整预定AT业务流的反向MAC层参数，以要求预定AT提高发送速率；The BTS adjusts the reverse MAC layer parameters of the scheduled AT service flow to require the scheduled AT to increase the sending rate; BTS恢复AT的接入消息发送频度；The BTS resumes the sending frequency of the AT's access message; BTS将RAB设置为正常状态或者将RAB的门限设置为第二预定值，以要求AT提高发送速率。The BTS sets the RAB to a normal state or sets the threshold of the RAB to a second predetermined value, so as to require the AT to increase the sending rate. 8、一种收发基站，其特征在于，所述收发基站中设置有存储模块、检测模块和拥塞控制处理模块；8. A transceiver base station, characterized in that, the transceiver base station is provided with a storage module, a detection module and a congestion control processing module; 存储模块：存储有ABIS接口反向预拥塞控制门限；Storage module: stores the ABIS interface reverse pre-congestion control threshold; 检测模块：检测ABIS接口反向拥塞程度，并输出检测结果；Detection module: detect the degree of reverse congestion of the ABIS interface, and output the detection result; 拥塞控制处理模块：在确定检测模块输出的ABIS接口反向拥塞程度达到存储模块中存储的预拥塞控制门限时，对ABIS接口进行拥塞控制处理。Congestion control processing module: when it is determined that the reverse congestion degree of the ABIS interface output by the detection module reaches the pre-congestion control threshold stored in the storage module, perform congestion control processing on the ABIS interface. 9、如权利要求8所述的一种收发基站，其特征在于，所述拥塞控制处理模块中包括：判断子模块和拥塞控制处理子模块；9. The transceiver base station according to claim 8, wherein the congestion control processing module includes: a judging submodule and a congestion control processing submodule; 判断子模块：在确定检测模块输出的ABIS接口反向拥塞程度达到存储模块中存储的ABIS接口反向预拥塞控制门限时，通知拥塞控制处理子模块进行拥塞控制处理；Judgment sub-module: when it is determined that the ABIS interface reverse congestion degree output by the detection module reaches the ABIS interface reverse pre-congestion control threshold stored in the storage module, notify the congestion control processing sub-module to perform congestion control processing; 拥塞控制处理子模块：在接收到拥塞控制处理通知时，ABIS接口进行拥塞控制处理，所述拥塞控制处理包括下述步骤中的一个或多个：Congestion control processing sub-module: when receiving the congestion control processing notification, the ABIS interface performs congestion control processing, and the congestion control processing includes one or more of the following steps: 将RAB设置为忙状态或者将RAB的门限设置为预定值，以要求AT降低发送速率；Set the RAB to a busy state or set the threshold of the RAB to a predetermined value to require the AT to reduce the sending rate; 限制AT的接入消息发送频度；Limit the frequency of sending AT access messages; 调整预定AT业务流的反向MAC层参数，以要求预定AT降低发送速率。Adjust the reverse MAC layer parameters of the predetermined AT service flow to require the predetermined AT to reduce the sending rate. 10、如权利要求9所述的一种收发基站，其特征在于，所述拥塞控制处理模块中还设置有拥塞控制取消子模块；10. The base transceiver station according to claim 9, wherein the congestion control processing module is further provided with a congestion control cancellation submodule; 判断子模块在通知拥塞控制处理子模块进行拥塞控制处理后，又确定检测模块输出的ABIS接口反向拥塞程度不超过存储模块中存储的ABIS接口反向预拥塞控制取消门限时，通知拥塞控制取消子模块取消拥塞控制处理；After the judging sub-module notifies the congestion control processing sub-module to perform congestion control processing, and determines that the ABIS interface reverse congestion degree output by the detection module does not exceed the ABIS interface reverse pre-congestion control cancellation threshold stored in the storage module, it notifies the congestion control cancellation The sub-module cancels the congestion control processing; 拥塞控制取消子模块：在接收到判决子模块输出的拥塞控制取消通知后，对ABIS接口进行拥塞控制取消处理；Congestion control cancellation sub-module: After receiving the congestion control cancellation notification output by the judgment sub-module, perform congestion control cancellation processing on the ABIS interface; 所述存储模块中存储的ABIS接口反向预拥塞控制取消门限小于预拥塞控制门限。The ABIS interface reverse pre-congestion control cancellation threshold stored in the storage module is smaller than the pre-congestion control threshold.
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