WO2009149636A1

WO2009149636A1 - Method for communication switching in a base station transceiver station and the base station subsystem thereof

Info

Publication number: WO2009149636A1
Application number: PCT/CN2009/071866
Authority: WO
Inventors: 刘绍峰; 邹成钢; 李国宏
Original assignee: 华为技术有限公司
Priority date: 2008-06-13
Filing date: 2009-05-20
Publication date: 2009-12-17
Also published as: CN101291538A; CN101291538B

Abstract

A method for communication switching in a base station transceiver station (BTS) and the base station subsystem thereof are disclosed in the embodiments of the present invention. The present invention solves the problem of communication switching between a calling mobile station and a called mobile station which are both located in a same BTS group. The method includes that the communication switching between the calling mobile station and the called mobile station is performed at a transmission convergence BTS in a BTS group, when the calling mobile station and the called mobile station are judged from a same BTS group under a same base station controller (BSC) by the base station controller (BSC). The base station subsystem includes a base station controller and a base station transceiver station. The embodiments of the present invention enable the calling mobile station and the called mobile station to perform communication switching at the communication convergence BTS without a transcoder TC performing encoding/decoding for the voice frames.

Description

Method for performing communication exchange at base transceiver station and base station subsystem The present application claims a method and base station for communication exchange at a base transceiver station, which is filed on June 13, 2008 and has the application number of 200810110678.X. The priority of the Chinese application of the "Subsystem" is incorporated herein by reference in its entirety.

Technical field

The present invention relates to telecommunications communication technologies, and in particular, to a method for performing communication exchange between a Base Transceiver Station (BTS) and a Base Station Subsystem (BSS).

Taking the Global System for Mobile communications (GSM) as an example, the base station subsystem BSS usually includes: a base transceiver station BTS, a base station controller (BSC) and/or a code converter (Transcoder, TC). ). The BTS communicates with the mobile station (MS) via the Um wireless interface, and the TC is externally connected to the Mobile Switching Center (MSC) through the A interface. Within the BSS, the BSC is connected to the BTS through the Abis interface, and through the Ater interface and the TC. Connected.

According to the GSM protocol, the BSS does not provide the voice service switching function. The uplink voice frame is transmitted from the BTS to the BSC via the Abis interface, and after the BSC is internally exchanged, it is transmitted to the TC through the Ater interface. The TC decodes the voice frame and transmits it through the A interface. The MSC to the core network (Core Network) is switched to the downlink voice frame on the CN side, and then transmitted to the TC through the A interface. After the downlink voice frame is encoded by the TC, it is transmitted to the BSC through the Ater interface. After internal exchange, it is transmitted to the BTS via the Abis interface.

In the prior art, when a pair of mobile calls are located inside the same radio access network, especially when the BTSs accessed by the calling mobile station and the called mobile station are located in the same BTS group, the voice frame must also be transmitted back. Switch to the CN side of the core network. As shown in Figure 1, a pair of calling MSs (MSa, MSb) make calls, and the voice frames are processed as follows: MSa->BTSl->BTS3->BSC->TC->MSC->TC->BSC->BTS3->BTS2-> MSb.

In the process of the creation of the present invention, the inventors have found that at least the following problems exist in the prior art:

1) Since the voice frame has two TC codec conversions in the transmission, it will cause a large delay, reduce the voice quality, and increase the waste of the TC resource and the Ater interface transmission resource;

2) The bandwidth consumption of the Abis interface transmission network will be increased, and the bottleneck of the Abis interface transmission resource will be caused;

3) Due to the participation of MSC, the waste of existing CN side network resources will be increased. Summary of the invention

Embodiments of the present invention provide a method for performing communication exchange at a base transceiver station BTS and a base station subsystem for solving a communication exchange problem between a calling mobile station and a called mobile station in the same BTS group, which can save The transmission resources of the Abis interface and the Ater interface reduce the transmission delay during the call, improve the voice quality, and save the transmission bandwidth of the TC and the CN side.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

A method for performing communication exchange at a base transceiver station BTS includes:

Receiving, by the base station controller, a command for performing communication exchange between the calling mobile station and the called mobile station, where the command is determined by the BSC that the calling mobile station and the called mobile station are located in the same BSC. Sended within the BTS group;

The transmission convergence BTS in the BTS group performs communication exchange between the calling mobile station and the called mobile station.

A base station controller includes:

a BSC radio resource module, configured to send a communication exchange request message to the BTS management module when the calling mobile station and the called mobile station are located in the same base station controller BSC;

a BTS management module, configured to: according to the communication exchange request message, determine that the calling mobile station and the called mobile station are located in the same BTS group, and send the caller to the transmission aggregation BTS in the BTS group The mobile station and the called mobile station exchange instructions for communication. A base transceiver station includes:

a receiving unit, configured to receive an instruction sent by the base station controller BSC to perform communication exchange between the calling mobile station and the called mobile station, where the calling mobile station and the called mobile station are located in the same BTS under the same BSC s;

And a switching unit, configured to perform communication exchange between the calling mobile station and the called mobile station according to the communication exchange instruction received by the receiving unit.

A base station subsystem includes:

a base station controller, configured to: when the calling mobile station and the called mobile station are located in the same BTS group under the same base station controller BSC, send a call to the calling mobile station to the transmission aggregation BTS in the BTS group An instruction to exchange communication with the called mobile station;

The base transceiver station is configured to perform communication exchange between the calling mobile station and the called mobile station according to the communication exchange command from the base station controller.

The above technical solution provided by the embodiment of the present invention, when determining that the calling mobile station and the called mobile station are from the same BTS group under the same base station controller BSC, the calling mobile station and the called mobile station are The transmission aggregation BTS in the BTS group performs communication exchange, so that the calling mobile station and the called mobile station from the same BTS group do not need to perform encoding/decoding for the voice frame through the TC, thereby reducing the transmission delay during the call. The voice quality is improved, the TC resources are saved, and the transmission resources of the Abis interface and the Ater interface are saved. At the same time, the core network is not limited, and the core network can be supported without changing the core network, thereby saving the CN side. Transmission bandwidth. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly described below.

1 is a schematic diagram of a process of processing a voice frame of a pair of calling and called MSs in the prior art;

2 is a flowchart of a method for performing communication exchange in a BTS according to an embodiment of the present invention; FIG. 3 is a schematic diagram of one or more BTS situations in a same BTS group in a TDM manner; FIG. A schematic diagram of a BTS for communication exchange; 5 is a schematic diagram of communication exchange between different BTSs according to Embodiment 2 of the present invention; FIG. 6 is a schematic diagram of communication exchange in an IP transmission convergence BTS according to Embodiment 3 of the present invention; FIG. 7 is a base station controller according to an embodiment of the present invention; Functional module diagram;

FIG. 8 is a schematic structural diagram of a base transceiver station according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a base station subsystem according to an embodiment of the present invention. detailed description

The embodiment of the present invention provides a BTS group and a transmission convergence BTS concept:

In time division multiplexing TDM mode, if:

The calling mobile station and the called mobile station access the same BTS;

Or the calling mobile station and the called mobile station access different BTSs, and the different access BTSs are directly or indirectly connected to the same primary BTS;

Alternatively, the BTS accessed by one of the calling mobile station and the called mobile station is a primary BTS, and the BTS accessed by the other party is directly or indirectly connected to the primary BTS; wherein, the primary BTS Refers to the BTS directly connected to the BSC through the Abis interface;

If one of the above situations is met, the primary called mobile station is considered to be located in the same BTS group.

In the TDM mode, the transport convergence BTS may be the same access BTS of the calling mobile station and the called mobile station, or a primary BTS directly connected to the BSC, and one or more BTSs are connected by the transmission convergence BTS to form the same. BTS group.

In the Internet Protocol IP mode, if:

The calling mobile station and the called mobile station access the same BTS;

Alternatively, the calling mobile station and the called mobile station access different BTSs, and the different access BTSs can communicate with each other through the IP transmission network;

Alternatively, the calling mobile station and the called mobile station access different BTSs, and the different access BTSs are in different IP transmission networks, but can communicate with each other through the same IP transmission convergence BTS;

In the IP mode, the transport convergence BTS can be the same connection between the calling mobile station and the called mobile station. Into the BTS, or different access BTSs that can communicate through the IP transmission network, or IP transmission aggregation BTS, one or more BTSs are connected by the transmission aggregation BTS to form the same BTS group.

The method for performing communication exchange on the BTS, the base station controller, the base transceiver station, and the base station subsystem provided by the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

It is to be understood that the base transceiver station BTS and the base station controller BSC according to the embodiments of the present invention are mainly described by taking the GSM system as an example. However, in other communication systems, the base transceiver station and the base station controller have corresponding titles. For example, in a wideband code division multiple access WCDMA system, the base station is a NodeB, and the base station controller is a radio network controller RNC. For the sake of simplicity, the present invention is described by taking BTS and BSC as examples, but is not limited thereto.

As shown in FIG. 2, FIG. 2 is a schematic diagram of a method for performing communication exchange in a BTS according to an embodiment of the present invention. The method in this embodiment includes:

Step 201: Determine whether both the calling mobile station and the called mobile station are from the same base station controller BSC.

If both the calling mobile station and the called mobile station are from the same BSC, proceed to step 202. If the calling mobile station and the called mobile station are not from the same BSC, the communication switching process described in this embodiment may be exited.

In this step, the BSC uniquely identifies an MS terminal by using a Global Call Reference (GCR), which includes a Global BSC Identifier and a Local Call Reference, which are used to uniquely identify the BSC. And calls within the BSC.

The method for judging whether the calling mobile station and the called mobile station are from the same BSC includes: mode 1, the call detection can be completed without relying on the MSC, and the transmission and detection of the GCR can be completed by the TC, and the specific detection process is as follows: The TC of the upward BSC sends the GCR of the calling mobile station, the GCR includes a global BSC identification identifier; the downlink TC receives the GCR of the calling mobile station and sends it to the BSC of the called mobile station side; The BSC on the mobile station side judges the calling mobile station and the called mobile by using the global BSC identification identifier in the GCR of the calling mobile station Whether the stations are from the same BSC.

In the second mode, the MSC can be used to complete the call detection. For example, the BSC of the calling mobile station sends a GCR of the calling mobile station to the MSC, where the GCR information includes a global BSC identification identifier; the calling mobile station The GCR is received by the MSC and sent to the BSC of the called mobile station side; the BSC of the called mobile station side determines the calling mobile station and the called mobile by using the global BSC identification identifier in the GCR of the calling mobile station. Whether the station is from the same BSC.

Step 202: The BSC determines whether the calling and called mobile stations are located in the same BTS group. If the calling mobile station and the called mobile station are located in the same BTS group, proceed to step 203, and if not located in the same BTS group, exit the communication switching process described in this embodiment.

Figure 3 shows various scenarios of the BTS in which the primary and secondary mobile stations are located in the same BTS group in the time division multiplexing TDM mode, including:

The calling mobile station and the called mobile station access the same BTS (case 1 or 4 or 5 as shown in the figure); or

The calling mobile station and the called mobile station access different BTSs, and the different access BTSs are directly or indirectly connected to the same primary BTS (as in the case of 2 or 3); or

The BTS accessed by the calling mobile station and the called mobile station side is a primary BTS, and the BTS accessed by the other party is directly or indirectly connected to the primary BTS (as in the case 6).

The first-level BTS refers to a BTS that is directly connected to the BSC through the Abis interface, and the BTS where the BTS of the primary called party is located in the BTS group is collectively referred to as a transmission and convergence BTS, that is, In the TDM mode, the transmission aggregation BTS may be the same access BTS of the primary and the called mobile station, or a primary BTS directly connected to the BSC, and one or more BTSs are connected by the transmission aggregation BTS to form the same BTS group. If one of the above situations is met, it is considered that the calling and called mobile stations are located in the same BTS group.

In the Internet Protocol IP mode, the BTSs in which the calling and called mobile stations are located in the same BTS group can also have various situations, including:

The calling mobile station and the called mobile station access the same BTS; or The calling mobile station and the called mobile station access different BTSs, and the different access BTSs communicate with each other through the IP transmission network; or

The calling mobile station and the called mobile station access different BTSs, and the different access BTSs are in different IP transmission networks, but can communicate with each other through the same IP transmission.

There is no BTS level concept in the BTS group in IP mode, and all BTS levels are the same. The BTS in which the BTS of the primary called party is located in the BTS group may be collectively referred to as a transmission aggregation BTS. That is, in the IP mode, the transmission aggregation BTS may be the same access BTS of the primary and the called mobile station. , or different access BTSs that can communicate through the IP transmission network, or IP transmission aggregation BTS. One or more BTSs are connected by the transmission aggregation BTS to form the same BTS group. If one of the above situations is met, the primary and the called mobile stations are considered to be located in the same BTS group.

Step 203: The BSC determines whether the voice coding rate in the access information of the calling mobile station and the called mobile station is the same. If the voice coding rate in the access information of the calling mobile station and the called mobile station is different, Then, proceed to step 204; if the voice coding rate in the access information of the calling mobile station and the called mobile station is the same, then the process proceeds to step 205.

Step 204, adjusting the speech coding rate of the calling mobile station and the called mobile station to the same speech coding rate.

The scheme for adjusting the voice coding rate of the calling mobile station and the called mobile station to the same voice coding rate may be various, including: adjusting the voice coding rate of the called mobile station to the voice coding rate of the calling mobile station; Alternatively, the voice coding rate of the calling mobile station may be adjusted to the voice coding rate of the called mobile station; or the voice coding rate of the calling mobile station and the called mobile station may be adjusted to the calling mobile station. The same speech coding rate as the speech code rate of the called mobile station.

Step 205: The BSC sends an instruction for performing communication exchange to the transmission aggregation BTS in the BTS group.

Step 206: According to the communication exchange instruction, the calling mobile station and the called mobile station perform communication exchange in a transmission convergence BTS in the BTS group. The communication convergence BTS in the BTS group for communication exchange may specifically include two situations, such as:

In the TDM mode, an Abis interface transmission slot information table is configured in the transmission convergence BTS, where the transmission slot information table records circuit slot information of the calling mobile station and the called mobile station, according to the configured transmission time. The slot information table loops back the circuit slots of the calling mobile station and the called mobile station.

In the IP mode, an Abis interface network interworking function (IFF) table is configured in the transmission aggregation BTS, where the IWF table records exchange routing information between the calling mobile station and the called mobile station, according to the configured IWF. The table changes the destination IP and the destination port, and loops back the switched routes of the calling mobile station and the called mobile station. Table 1 and Table 2 show the IWF table configured in the IP mode. The IWF table can convert the uplink voice frame format to the IP packet format. The downlink IP packet format can be converted to the voice frame format. The speech frame format is converted to each other. Table 1

Table 2

After the transmission convergence BTS in the BTS group performs communication exchange between the calling mobile station and the called mobile station, the method in the embodiment of the present invention, as shown in FIG. 2, may further include:

Step 207: The BSC translates the transmission resource of the Ater interface and the transmission resource of the Abis interface that is translated to the transmission convergence BTS.

After the communication exchange between the calling mobile station and the called mobile station is completed, the method of the embodiment of the present invention may further include:

Step 208: The transmission aggregation BTS removes the circuit slot loopback or the exchange route loopback between the calling mobile station and the called mobile station. The loopback removal method may be: the BSC notifying the transmission aggregation BTS to delete the configured Abis interface transmission slot information table or the network interworking function IWF table, where the calling mobile station and the called party are moved by the transmission convergence BTS The circuit's time slot loopback or switch routing loopback is removed.

In the method for performing communication exchange in the BTS provided by the embodiment of the present invention, when the calling mobile station and the called mobile station are from the same BSC, the BSC firstly determines whether the calling mobile station and the called mobile station are located in the same BTS group. Determining, if the calling mobile station and the called mobile station are located in the same BTS group, determining, by the BSC, whether the voice coding rate in the access information of the calling mobile station and the called mobile station is the same, if Differently, the speech coding rates of the calling mobile station and the called mobile station are adjusted to the same rate. Through the above operation, after the same BSC sends a communication exchange instruction to the transmission aggregation BTS in the same BTS group, according to the communication exchange instruction, the calling mobile station and the called mobile station may be in the The transmission aggregation BTS in the BTS group performs communication exchange. In this way, the calling mobile station and the called mobile station from the same BTS group do not need to encode/decode the voice frame through the TC, thereby reducing the transmission delay during the call, improving the voice quality, and saving the TC resource; It also saves the transmission resources of the Abis interface and the Ater interface; at the same time, it can be supported without the restriction of the core network, and can be supported without changing the core network, thus saving the transmission bandwidth of the CN side.

The communication between the calling mobile station and the called mobile station in the BTS group for communication exchange can be performed in two modes: TDM mode and IP mode. Compared with the exchange in the TDM mode, the hybrid transmission mode of the IP bearer data service can realize the narrowband and broadband integrated transmission, which can greatly reduce the transmission construction and operation and maintenance cost of the operator. The following is a more specific description of the communication exchange in the BTS in IP mode:

The first embodiment, as shown in FIG. 4, is a schematic diagram of the communication exchange between the same BTS in the IP mode. The method in the first embodiment includes:

The BSC judges that the calling and called MSa and MSb are under the same BTS, as shown in Figure 4, and can be in the same BST1.

Determining, by the BSC, the speech coding in the access information of the calling mobile station and the called mobile station The rates are the same, or if the speech coding rates in the access information of the calling mobile station and the called mobile station are not the same, the speech coding rate of the calling and called mobile stations is adjusted to the same rate.

The BSC sends an instruction for performing a communication exchange to the BTS1, where the instruction carries an IWF table, and the information of the IWF table, for example:

The BTS1 replaces the voice frame of the MSa with the voice frame of the MSb according to the IWF table, and the processing in the reverse direction is similar, thereby implementing internal voice loopback in the BTS 1.

In the voice call of the terminal MSa and the MSb in the first embodiment, the voice loopback can be performed not directly according to the IP address, but the voice loopback is directly performed in the BTS1, so that the communication of the voice frame between the MSa and the MSb is realized, thereby saving the BTS1 to The transmission resources of the Abis interface of the BSC also save the transmission resources of the Ater interface of the BSC and the TC and the transmission bandwidth of the TC and CN side.

Embodiment 2 As shown in FIG. 5, FIG. 5 is a schematic diagram of communication exchange between different BTSs, and the method of the second embodiment includes:

The BSC determines that the calling mobile station MSa and the called mobile station MSb are from different BTSs, and the different BTSs can communicate with each other through the IP transmission network. As shown in FIG. 5, the MSa may be from BTS1, and the MSb is from BTS3, BTS1. It can communicate with the BTS3 through the IP transmission network.

The BSC determines that the voice coding rate in the access information of the calling mobile station and the called mobile station is the same, or if the voice coding rate in the access information of the calling mobile station and the called mobile station is not the same, The speech coding rate of the primary and secondary mobile stations is adjusted to the same rate.

Sending, by the BSC, an instruction for performing a communication exchange to the BTS3, where the instruction carries an IWF table, The information of the IWF table, such as:

According to the IWF table, the destination IP address of the MSA voice frame is changed from the IP0 of the BSC to the IP3 of the BTS3, and the destination port is changed from the PORT0 of the BSC to the PORT3 of the BTS3, and the message is transmitted on the IP network, directly according to the destination IP address IP3. The route is forwarded to the BTS3, and the IP packet is changed to the downlink MSb voice frame for processing in the BTS3, and the reverse direction processing is similar, thereby implementing the communication exchange of the voice frame between the MSa and the MSb.

In the voice call of the terminal MSa and the MSb in the second embodiment, the route can be exchanged between the BTS1 and the BTS3, and the communication frame of the voice frame between the MSa and the MSb is exchanged. The transmission resources of the Abis interface from the BTS1 to the BSC and the BTS2 to the BSC are saved, and the transmission resources of the Ater interface of the BSC and the TC and the transmission bandwidth of the TC and CN side are also saved.

The third embodiment, as shown in FIG. 6, is a schematic diagram of the communication exchange in the IP convergence BTS. The method in the third embodiment includes:

The BSC determines that the calling mobile station MSa and the called mobile station MSb are from different BTSs. The different BTSs are in different IP transmission networks, but can communicate and transmit through the IP transmission aggregation BTS. As shown in FIG. 6, it can be: MSa comes from BTS1, MSb comes from BTS3, BTS1 and BTS3 can communicate with each other through IP transmission convergence BTS.

The BSC sends an instruction for performing a communication exchange to the IP transmission aggregation BTS, where the instruction carries an IWF table, and the information of the IWF table, for example: Voice frame user datagram protocol UDP/Internet Protocol IP

Source IP Destination IP Source Port Destination Port Type

IP packet

IP1 IP3 PORT1 PORT3 UDP

The voice frame of the MSA transmits the IP data packet to the IP transmission aggregation BTS through the IP port of the BTS1. The destination IP address of the IP data packet is the IPO of the BSC, and the destination port is the PORT0 of the BSC, and is performed according to the IWF table at the IP transmission convergence BTS. The routing loopback is exchanged, and the destination IP of the IP packet of the MSa is replaced by the IP0 of the BSC to the IP3 of the BTS3. The packet is transmitted on the IP network, and is directly routed to the BTS3 according to the destination IP address IP3, and is changed to BTS3 in BTS3. The MSb's IP data packet is processed, and the reverse direction processing is similar, thereby realizing the communication exchange of the voice frame between the MSa and the MSb.

In the voice call of the terminal MSa and the MSb in the third embodiment, the voice loopback can be directly performed between the BTS1, the IP convergence BTS, and the BTS3 according to the IP address, and the communication of the voice frame between the MSa and the MSb is realized. Therefore, the transmission resources of the IP convergence BTS to the Abis interface of the BSC are saved, and the transmission resources of the Ater interface of the BSC and the TC and the transmission bandwidth of the TC and CN side are also saved.

Based on the method provided by the embodiment of the present invention, the embodiment of the present invention provides a base station controller, as shown in FIG. 7, including a BSC radio resource module 701, a BSC resource control module 702, and a BTS management module 703, where

The BSC radio resource module 701 is configured to send a communication exchange request message to the BTS management module when the calling mobile station and the called mobile station are located in the same base station controller.

Whether the calling mobile station and the called mobile station are from the same BSC, can be performed by the TC or by the MSC.

The BTS management module 703 is configured to: according to the performing the communication exchange request message, when the calling mobile station and the called mobile station are located in the same BTS group, send the to the transmission convergence BTS in the BTS group The calling mobile station and the called mobile station exchange instructions for communication.

The BSC radio resource module 701 is further configured to move the calling mobile station and the called party before the transmission convergence BTS in the BTS group exchanges communication between the calling mobile station and the called mobile station. The speech coding rate of the station is adjusted to the same speech coding rate.

The scheme for adjusting the voice coding rate of the calling mobile station and the called mobile station to the same voice coding rate may be various, including: adjusting the voice coding rate of the called mobile station to the voice coding of the calling mobile station. Rate; or adjust the speech coding rate of the calling mobile station to the speech coding rate of the called mobile station; or adjust the speech coding rate of the calling mobile station and the called mobile station to the calling mobile station and the called mobile station voice The same speech coding rate in the intersection of the coding rates.

The BSC resource control module 702 is configured to: after the communication convergence BTS in the BTS group performs communication exchange between the calling mobile station and the called mobile station, release the transmission resource of the Ater interface and release the transmission resource to the transmission aggregation. The transmission resource of the Abis interface of the BTS.

Based on the method provided by the embodiment of the present invention, the embodiment of the present invention further provides a base station receiving and transmitting station, as shown in FIG. 8, including:

The receiving unit 801 is configured to receive, by the base station controller BSC, an instruction for performing communication exchange between the calling mobile station and the called mobile station, where the calling mobile station and the called mobile station are located in the same BTS group under the same BSC. Inside.

The switching unit 802 is configured to perform communication exchange between the calling mobile station and the called mobile station according to the communication exchange instruction received by the receiving unit.

According to different modes of the BTS, the base transceiver station further includes:

The first configuration unit 803A is configured to configure an Abis interface transmission slot information table, where the transmission slot information table is used to record circuit time slots of the calling mobile station and the called mobile station. The switching unit 802 is further configured to perform loopback on the circuit slots of the calling mobile station and the called mobile station according to the transmission slot information table configured by the first configuration unit.

The second configuration unit 803B is configured to configure an Abis interface network interworking function IWF table, where the IWF table is used to record the exchange route between the calling mobile station and the called mobile station. The switching unit 802 is further configured to: change the destination IP and the destination port according to the IWF table configured by the second configuration unit, and perform loopback on the exchange route between the calling mobile station and the called mobile station.

The base transceiver station further includes: The deleting unit 804 is configured to delete the Abis interface transmission time slot information table or the network interworking function IWF table after the communication between the calling mobile station and the called mobile station ends, and move the calling mobile station and the called party The path slot loopback or switch routing loopback between the stations is removed.

Finally, based on the method provided by the embodiment of the present invention, the embodiment of the present invention further provides a base station subsystem, as shown in FIG. 9, including:

The base station controller 910 is configured to: when the calling mobile station and the called mobile station are located in the same BTS group under the same base station controller BSC, send the call mobile to the transmission aggregation BTS in the BTS group. The station and the called mobile station exchange instructions for communication.

The base transceiver station 920 is configured to perform communication exchange between the calling mobile station and the called mobile station accessing the base transceiver station according to the communication exchange command from the base station controller.

The base station controller 910 is further configured to: after the transmission convergence BTS in the BTS group exchanges communication between the calling mobile station and the called mobile station, perform voice coding of the calling mobile station and the called mobile station. The rate is adjusted to the same speech coding rate.

The base transceiver station 920 is further configured to configure an Abis interface transmission slot information table, where the transmission slot information table is used to record a circuit of a calling mobile station and a called mobile station that access the base transceiver station a time slot; loopbacks the circuit slots of the calling mobile station and the called mobile station according to the configured transmission slot information table.

The base transceiver station 920 is further configured to configure an Abis interface network interworking function IWF table, where the IWF table is used to record a switched route between a calling mobile station and a called mobile station that accesses the base transceiver station; The configured IWF table changes the destination IP address and the destination port, and loops back the switched routes of the calling mobile station and the called mobile station.

After the transmission convergence BTS in the BTS group exchanges communication between the calling mobile station and the called mobile station,

The base station controller 910 is further configured to translate the transmission resources of the Ater interface and the transmission resources of the transmission aggregation BTS Abis interface.

After the communication between the calling mobile station and the called mobile station ends, The base transceiver station 920 is further configured to delete the Abis interface transmission time slot information table or the network interworking function IWF table, and loop or exchange circuit time slots between the calling mobile station and the called mobile station. The route loopback is removed.

The embodiment of the present invention adopts the above technical solution. When the calling mobile station and the called mobile station are located under the same BSC, the BSC first determines whether the calling mobile station and the called mobile station are located in the same BTS group. If the BCS group is located in the same BTS group, it is further determined by the BSC whether the voice coding rate in the access information of the calling mobile station and the called mobile station is the same. If the voice coding rate is not the same, the calling party moves. The voice coding rate of the station and the called mobile station is adjusted to the same voice coding rate; the voice coding rate in the calling mobile station and the called mobile station access information is the same or the calling mobile station and the called party After the voice coding rate of the mobile station is adjusted to the same voice coding rate, the BSC sends an instruction for communication exchange to the transmission aggregation BTS in the BTS group, and the Abis interface transmission time slot is configured in the transmission convergence BTS according to the BTS of different modes. The manner in which the information table or the network interworking function is an IWF table, and the transmission convergence of the calling mobile station and the called mobile station in the BTS group is implemented. The BTS performs communication exchange. In this way, the calling mobile station and the called mobile station from the same BTS group do not need to perform encoding/decoding for the voice frame through the TC, thereby reducing the transmission delay during the call, improving the voice quality, and saving the TC resource; It also saves the transmission resources of the Abis interface and the Ater interface; at the same time, it can be supported without the limitation of the core network, and can be supported without modifying the core network, thus saving the transmission bandwidth of the CN side.

A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. In execution, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

The above is only a few embodiments of the present invention, and various modifications and changes may be made to the present invention without departing from the spirit and scope of the invention.

Claims

Claim

A method for performing communication exchange at a base transceiver station BTS, comprising: receiving an instruction sent by a base station controller BSC to perform communication exchange between a calling mobile station and a called mobile station, where the command is The BSC determines that the calling mobile station and the called mobile station are located in the same BTS group under the same BSC;

The transmission aggregation BTS in the BTS group performs communication exchange between the calling mobile station and the called mobile station.

The method according to claim 1, wherein the transmission convergence BTS in the BTS group performs communication exchange between the calling mobile station and the called mobile station, and includes:

In the time division multiplexing TDM mode, an Abis interface transmission slot information table is configured in the transmission convergence BTS, and circuit time slots between the calling mobile station and the called mobile station are performed according to the configured transmission slot information table. Loopback; wherein the transport convergence BTS comprises: the same BTS directly or indirectly connected to the access BTS different from the calling mobile station and the called mobile station.

In the Internet Protocol IP mode, an Abis interface network interworking function IWF table is configured in the transport aggregation BTS, and the destination IP address and the destination port are changed according to the configured IWF table, and the exchange between the calling mobile station and the called mobile station is performed. The route is looped back. The transport convergence BTS includes: a different access BTS that the calling mobile station and the called mobile station communicate with each other through the IP transmission network, or an IP transmission convergence BTS.

The method according to any one of claims 1 to 3, wherein before the transmission convergence BTS in the BTS group exchanges communication between the calling mobile station and the called mobile station, the method further Includes:

The BSC adjusts the speech coding rate of the calling mobile station and the called mobile station to the same speech coding rate.

The method according to any one of claims 1 to 3, wherein after the transmission convergence BTS in the BTS group performs communication exchange between the calling mobile station and the called mobile station, the method further Includes:

The BSC translates the transmission resources of the Ater interface and the transmission resources of the Abis interface that is translated to the transmission convergence BTS.

The method according to claim 2 or 3, wherein after the communication between the calling mobile station and the called mobile station ends, the method further includes:

The transmission aggregation BTS deletes the Abis interface transmission slot information table or network interworking function IWF

The method according to any one of claims 1 to 6, wherein the BSC determines that the calling mobile station and the called mobile station are located in the same BSC, and includes:

The code converter TC of the BSC uplink line on the calling mobile station side transmits the global call identifier GCR of the calling mobile station, and the GCR includes the global BSC identification identifier of the BSC on the calling mobile station side;

The downlink code converter TC receives the global call identity GCR of the calling mobile station and sends it to the BSC of the called mobile station side;

The BSC on the called mobile station side uses the global BSC identification identifier of the BSC on the calling mobile station side in the GCR of the calling mobile station to determine that both the calling mobile station and the called mobile station are from the same BSC. ; or,

The BSC on the calling mobile station side transmits the global call identifier GCR of the calling mobile station to the mobile switching center MSC, and the GCR includes the global BSC identification identifier of the BSC on the calling mobile station side;

The mobile switching center MSC receives the GCR of the calling mobile station and sends it to the BSC of the called mobile station side;

The BSC on the called mobile station side uses the global BSC identification identifier of the BSC on the calling mobile station side in the GCR of the calling mobile station to determine that both the calling mobile station and the called mobile station are from the same BSC.

8. A base station controller, comprising: a BSC radio resource module, configured to send a communication exchange request message to the BTS management module when the calling mobile station and the called mobile station are located in the same base station controller BSC;

a BTS management module, configured to send, according to the communication exchange request message, that the calling mobile station and the called mobile station are located in the same BTS group, to the transmission aggregation BTS in the BTS group to send the calling party The mobile station and the called mobile station exchange instructions for communication.

9. The base station controller of claim 8 wherein:

The BSC radio resource module is further configured to: after the transmission convergence BTS in the BTS group exchanges communication between the calling mobile station and the called mobile station, perform voice coding of the calling mobile station and the called mobile station. The rate is adjusted to the same speech coding rate.

The base station controller according to claim 9, wherein the base station controller further comprises:

a BSC resource control module, configured to: after the communication convergence BTS in the BTS group exchanges communication between the calling mobile station and the called mobile station, release the transmission resource of the Ater interface and translate the transmission resource to the transmission convergence BTS The transmission resource of the Abis interface.

11. A base transceiver station, comprising:

a receiving unit, configured to receive, by the base station controller BSC, an instruction for performing communication exchange between the calling mobile station and the called mobile station, where the calling mobile station and the called mobile station are located in the same BTS group under the same BSC ;

The base transceiver station according to claim 11, wherein the base transceiver station further comprises:

a first configuration unit, configured to configure an Abis interface transmission time slot information table, where the transmission time slot information table is used to record circuit time slots of the calling mobile station and the called mobile station;

The switching unit is configured to loop back circuit slots of the calling mobile station and the called mobile station according to the transmission slot information table configured by the first configuration unit.

a second configuration unit, configured to configure an Abis interface network interworking function IWF table, where the IWF table is used to record a switched route between the calling mobile station and the called mobile station;

The switching unit is configured to change the destination IP and the destination port according to the IWF table configured by the second configuration unit, and perform loopback on the exchange route between the calling mobile station and the called mobile station.

The base transceiver station according to claim 12 or 13, wherein the base transceiver station further comprises:

a deleting unit, configured to delete the Abis interface transmission time slot information table or the network interworking function IWF table after the communication between the calling mobile station and the called mobile station ends, and the calling mobile station and the called mobile station The circuit between the time slot loopback or the exchange route loopback is removed.

15. A base station subsystem, comprising:

And a base transceiver station, configured to perform communication exchange between the calling mobile station and the called mobile station according to the communication exchange instruction from the base station controller.

16. The base station subsystem of claim 15 wherein:

The base station controller is further configured to: before the transmission convergence BTS in the BTS group exchanges communication between the calling mobile station and the called mobile station, the voice coding rate of the calling mobile station and the called mobile station Adjust to the same speech encoding rate.

17. The base station subsystem of claim 16 wherein:

The base transceiver station is further configured to configure an Abis interface transmission time slot information table, where the transmission time slot information table is used to record circuit time slots of the calling mobile station and the called mobile station; The slot information table loops back the circuit slots of the calling mobile station and the called mobile station; or

The base transceiver station is further configured to configure an Abis interface network interworking function IWF table, the IWF The table is used to record the exchange route between the calling mobile station and the called mobile station; change the destination IP and the destination port according to the configured IWF table, and loop back the exchange route between the calling mobile station and the called mobile station.

18. The base station subsystem of claim 17 wherein:

The base station controller is further configured to: after the communication convergence BTS in the BTS group performs communication exchange between the calling mobile station and the called mobile station, release the transmission resource of the Ater interface and translate the transmission to the transmission Convergence of transmission resources of the Abis interface of the BTS.

19. The base station subsystem of claim 18, wherein

The base transceiver station is further configured to delete the Abis interface transmission time slot information table or the network interworking function IWF table after the communication between the calling mobile station and the called mobile station ends, and the calling mobile station The circuit slot loopback or exchange routing loopback between the called mobile station and the called mobile station is removed.