WO2013026322A1

WO2013026322A1 - Method and system for eliminating mutual interference between bsss during vamos

Info

Publication number: WO2013026322A1
Application number: PCT/CN2012/077561
Authority: WO
Inventors: 翁儒复; 李靖; 况振东
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-08-24
Filing date: 2012-06-26
Publication date: 2013-02-28
Also published as: CN102958113A; CN102958113B

Abstract

Disclosed is a method for eliminating mutual interference between base station subsystems (BSSs) during voice services over adaptive multi-user channels on one slot (VAMOS). The method comprises: configuring a logic interface between BSSs; transmitting among BSSs VAMOS-relevant information by means of said logic interface. Also disclosed is a system for eliminating mutual interference between BSSs during VAMOS. The present invention can solve the problem of user interference between BSSs that is due to BSSs being unable to obtain from each other respective conditions of VAMOS use.

Description

Method and system for solving mutual interference between BSSs when using adaptive single-slot multi-user channel speech

The present invention relates to the field of mobile communications, and more particularly to a method and system for solving mutual interference between base station subsystems (BSS) when using adaptive single-slot multi-user channel voice (VAMOS). Background technique

The network architecture of the traditional Global System for Mobile Communications (GSM) system is shown in Figure 1. It includes the core network, base station controller (BSC, Base Station Controller) and base station (BTS, Base Transceiver Station). And the BTS can be collectively referred to as a Base Station Subsystem (BSS). The interface between the core network and the BSC is called the A interface, and the interface between the BSC and the BTS is called the Abis interface, and the BTS and the mobile terminal ( The interface between MSs is called the Um interface; the core network, BSC and BTS work together to provide complete mobile voice service functions to the MS.

The traditional GSM is a time division multiple access (TDMA) system. The system capacity is limited to time slot (TS) resources, and a TS can only carry one full rate (FR, Full Rate) voice user or Two half-rate (HR, Half Rate) voice users. With the evolution of technology, many techniques for improving the efficiency of spectrum utilization have emerged, and the technology of Voice services over Adaptive Multi-user channels on One Slot (VAMOS) is one of them. VAMOS technology allows two FR voice users or four HR voice users to be simultaneously carried on a single TS, thereby increasing the support of voice user capacity throughout the GSM network without requiring additional spectrum resources.

With the continuous development and evolution of VAMOS technology, operators' requirements for VAMOS technology are also increasing, and more attention is paid to the performance impact of VAMOS technology on the network.

In the prior art, since the BSS cannot know the situation in which other BSSs use VAMOS, Therefore, the BSS can only consider using VAMOS pairing or contact pairing for the MS according to its own use of VAMOS. This leads to the problem that the VAMOS paired channels between the BSSs affect each other after the VAMOS function is used. For example: BTS1 under BSS1 performs VAMOS pairing between User 1 and User 2, using frequency point 1, and BTS2 under BSS2 performs VAMOS pairing between User 3 and User 4, and also uses frequency point 1. At this time, if BTS1 and BTS2 are close to each other, the four users will have mutual interference. Summary of the invention

In view of this, the main purpose of the embodiments of the present invention is to provide a method and system for solving mutual interference between BSSs when using VAMOS, so as to solve the problem of user interference between BSSs caused by the inability to know each other using VAMOS between BSSs.

To achieve the above objective, the technical solution of the embodiment of the present invention is implemented as follows:

Embodiments of the present invention provide a method for solving mutual interference between BSSs when using VAMOS, and the method includes:

Configuring a logical interface between base station subsystems (BSS);

Information about adaptive single-slot multi-user channel voice (VAMOS) is transmitted between the BSSs through the logical interface.

The logical interface is based on an Internet Protocol (IP) bearer or a Time Division Multiplexing (TDM) bearer.

The message format between the BSSs uses the message transmission part (MTP) and the signal connection control part (SCCP) in the No. 7 signaling;

The BSS transmits information about the VAMOS through the message.

The VAMOS related information includes one or more VAMOS pairing information.

Each of the VAMOS pairing information includes: frequency point information used by a group of terminals performing VAMOS pairing under the BSS transmitting the related information of the VAMOS, and cell information in which the cell is located.

After receiving the related information of the VAMOS, the method further includes: The BSS receiving the related information of the VAMOS determines the unused frequency point according to the frequency point information used by the VAMOS paired one or more groups of terminals under the BSS transmitting the VAMOS related information;

VAMOS pairing is performed on one or more groups of terminals under the BSS that receive the relevant information of the VAMOS according to the unused frequency points.

The embodiment of the invention further provides a system for solving mutual interference between BSSs when using VAMOS, characterized in that the system comprises: a configuration module and a transmission module; wherein:

The configuration module is configured to configure a logical interface between the BSSs;

The transmission module is configured to transmit VAMOS related information between the BSSs through the logical interface.

The configuration module is further configured to configure a logical interface between the BSSs based on an Internet Protocol (IP) bearer or a Time Division Multiplexing (TDM) bearer.

The VAMOS related information includes one or more VAMOS pairing information.

The system also includes sending BSS and receiving BSS,

Correspondingly, the transmission module is further configured to transmit related information of the VAMOS that sends the BSS to the receiving BSS;

The receiving BSS is further configured to: after receiving the related information of the VAMOS, determine, according to the frequency point information used by the one or more groups of terminals that are VAMOS paired under the sending BSS, determine an unused frequency point; The unused frequency points perform VAMOS pairing on one or more sets of terminals of their own.

The embodiment of the invention solves the method and system for inter-BSS interference when using VAMOS, and configures a logical interface between the BSSs, through which the BSS can transmit information about each other's VAMOS. BSS can determine the information based on the VAMOS of other BSSs that are known. The frequency used, in this way, the BSS can perform VAMOS pairing on its own terminal using unused frequency points, and since the frequency points used are different, interference with terminals in other BSSs is avoided. DRAWINGS

Figure 1 is a schematic diagram of a conventional GSM network architecture;

2 is a schematic diagram of a method for solving mutual interference between BSSs when using VAMOS according to an embodiment of the present invention;

3 is a schematic diagram of a network architecture of a GSM according to an embodiment of the present invention;

FIG. 4 is a schematic flow chart of information related to transmitting VAMOS between BSSs according to an embodiment of the present invention. detailed description

The core idea of the solution for inter-BSS interference when using VAMOS is to: Send or receive VAMOS related information through a logical interface between BSSs.

Specifically, as shown in FIG. 2, the method in the embodiment of the present invention includes:

Step 201: Configure a logical interface between the BSSs.

As shown in FIG. 3, in the existing GSM network architecture, an interface is configured between the BSS and the BSS, and the BSS can transmit related information of the VAMOS to each other through the interface.

Preferably, the interface between the BSS and the BSS is a logical interface, which is based on an Internet Protocol (IP) bearer or a Time Division Multiplex (TDM) bearer.

The message format between the BSSs is defined by the Message Transfer Part (MTP) and the Signalling Connection Control Part (SCCP) in Signalling System No.7. The BSS transmits the relevant information of the VAMOS through the above message.

Step 202: The BSS transmits the related information of the VAMOS through the logical interface. The VAMOS related information contains one or more VAMOS pairing information. Each VAMOS pairing information includes: frequency point information used by a group of terminals for performing VAMOS pairing under the BSS transmitting the relevant information of the VAMOS, and cell information in which the cell is located.

After receiving the relevant information of the VAMOS, the method further includes:

The BSS receiving the relevant information of the VAMOS determines the unused frequency point according to the frequency point information used by the VAMOS paired one or more groups of terminals under the BSS transmitting the relevant information of the VAMOS;

The VAMOS pairing is performed on one or more groups of terminals under the BSS that receive the relevant information of the VAMOS according to the unused frequency points.

The flow of transmitting VAMOS related information through the logical interface between the BSSs is as shown in FIG. 4. In this embodiment, it is assumed that a logical interface is configured between the BSS1 and the BSS2. Specifically, the VAMOS is transmitted between the BSS1 and the BSS2 through the logical interface. The process of related news, including:

Step 401: The BSS1 sends a message to the BSS2 through the logical interface, where the message carries the information about the VAMOS of the BSS1.

The frequency point information used by a group of terminals that perform VAMOS pairing under BSS1 and the cell information of the group of terminals are referred to as one VAMOS pairing information; when there are multiple groups of terminals under BSS1 for VAMOS pairing, then VAMOS of BSS1 The related information contains multiple VAMOS pairing information.

As an implementation, information about VAMOS can also be sent along with other information.

Step 402: The BSS2 receives the message sent by the BSS1 through the logical interface, and learns the frequency used by the group or groups of terminals that are paired with the VAMOS under the BSS1, thereby determining the unused frequency points. When VAMOS pairing is performed on one or more groups of terminals under BSS2, the unused frequency points determined above are preferentially used.

Step 403: After receiving the message sent by the BSS1 through the logical interface, the BSS2 receives the BSS2. After the information about the VAMOS of the BSS 1, the acknowledgment message is sent to the BSS 1.

It should be noted that the foregoing steps 402 and 403 do not have the requirements of the sequence, the steps.

The 402 does not need to be executed immediately after the BSS2 receives the message sent by the BSS1, and may be executed after sending the confirmation message to the BSS1 in step 403, or may be performed simultaneously with the step 403.

In order to implement the foregoing solution, the embodiment of the present invention further provides a system for solving mutual interference between BSSs when using VAMOS, including: a configuration module and a transmission module; wherein:

a configuration module, configured to configure a logical interface between the BSSs;

The transmission module is configured to transmit information about the VAMOS between the BSSs through the logical interface. Preferably, the configuration module is further configured to configure a logical interface between the BSSs based on an Internet Protocol (IP) bearer or a Time Division Multiplexing (TDM) bearer.

Information about VAMOS contains one or more VAMOS pairing information.

Each VAMOS pairing information includes: frequency point information used by a group of terminals that perform VAMOS pairing under the BSS transmitting the relevant information of the VAMOS, and cell information in which the cell is located.

The system also includes sending BSS and receiving BSS,

Correspondingly, the transmission module is further configured to transmit related information of the VAMOS transmitting the BSS to the receiving BSS;

The receiving BSS is further configured to: after receiving the related information of the VAMOS, determine the unused frequency point according to the frequency point information used by the one or more groups of terminals that perform VAMOS pairing under the BSS; and according to the unused frequency point pair One or more sets of terminals of their own perform VAMOS pairing.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim

1. A method for solving mutual interference between BSSs when using VAMOS, the method comprising: configuring a logical interface between base station subsystems BSS;

The BSS transmits information about the adaptive single-slot multi-user channel voice VAMOS through the logical interface.

2. The method according to claim 1, wherein the logical interface is based on an Internet Protocol IP bearer or a time division multiplexed TDM bearer.

3. The method for resolving mutual interference between BSSs when using VAMOS according to claim 1, wherein the message format between the BSSs uses the message transmission part MTP and the signaling connection control part SCCP in the No. 7 signaling;

The BSS transmits information about the VAMOS through the message.

4. A method of inter-BSS interference when using VAMOS according to claim 1, 2 or 3, wherein the VAMOS related information comprises one or more VAMOS pairing information.

The method for resolving mutual interference between BSSs when using VAMOS according to claim 4, wherein each of said VAMOS pairing information comprises: a group of terminals for performing VAMOS pairing under BSS for transmitting relevant information of said VAMOS Frequency information and the cell information in which it is located.

The method for solving the mutual interference between the BSSs when using the VAMOS according to claim 5, wherein after receiving the related information of the VAMOS, the method further includes:

The BSS that receives the related information of the VAMOS determines frequency points that are not used according to frequency point information used by one or more groups of terminals that are VAMOS paired under the BSS that transmits the related information of the VAMOS;

VAMOS pairing is performed on one or more groups of terminals under the BSS that receive the related information of the VAMOS according to the unused frequency points.

7. A system for solving mutual interference between BSSs when using VAMOS, the system comprising: a configuration module and a transmission module; wherein:

The configuration module is configured to configure a logical interface between the base station subsystems BSS; the transmission module is configured to transmit, by using the logical interface, related information of the adaptive single-time slot multi-user channel voice VAMOS between the BSSs.

8. The system for inter-BSS interference when using VAMOS according to claim 7, wherein the configuration module is further configured to configure a logical interface between the BSSs based on an Internet Protocol IP bearer or a Time Division Multiplexing TDM bearer.

9. The system for inter-BSS interference when using VAMOS according to claim 7, wherein the VAMOS related information includes one or more VAMOS pairing information.

10. The system for resolving mutual interference between BSSs when using VAMOS according to claim 9, wherein each of said VAMOS pairing information comprises: a group of terminals for performing VAMOS pairing under BSS for transmitting relevant information of said VAMOS Frequency information and the cell information in which it is located.

11. The system for inter-BSS interference when using VAMOS according to claim 10, wherein the system further comprises a transmitting BSS and a receiving BSS,