WO2008055443A1

WO2008055443A1 - Method and system for transmission of 2g service through 3g network

Info

Publication number: WO2008055443A1
Application number: PCT/CN2007/071027
Authority: WO
Inventors: Shaocheng Xiong
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-11-08
Filing date: 2007-11-07
Publication date: 2008-05-15
Also published as: CN1972246A

Abstract

A method and system for transmission of 2G service through 3G network are provided in the present invention. The method mainly includes that the IP transmission manner is used between the RNC (base station controller) and the NODEB (base station), the RNC or NODEB serving as the transmitting party performs the time slot crossing processing for 2G (the second generation mobile communication) service; the RNC or NODEB serving as the transmitting party performs the combining processing for the processed time slot of 2G service and the time slot of 3G (the third generation mobile communication) service, the 2G service and 3G service combined aretransmitted to the NODEB or RNC serving as the receiving party by the transmission network at the same time. The system mainly includes BSC, RNC, NODEB and BTS. Using the present invention, the problem how the 2G/3G base station transmission together can be realized when the IP transmission manner is used on the 3G IUB interface is solved.

Description

Method and system for transmitting 2G service through 3G network

[1] Technical field

[2] The present invention relates to the field of network communications, and in particular, to a method and system for transmitting 2G services over a 3G network.

[3] Background Art

[4] in WCDMA (Wideband Code Division Multiple

Access, Wideband Code Division Multiple Access) R99 protocol, WCDMA NODEB (base station) and RNC (R adio Network

Interface between Controller, Base Station Controller) 1UB interface uses ATM (asynchronous transfer)

Mode, asynchronous transfer mode) Transmission protocol, with the development of IP technology. In the REL5 protocol, the networking diagram of the IUB interface is shown in Figure 1, and the IUB interface is connected by IP. The middle will pass through a transmission network. The current mainstream physical layer of transmission is E1/T1. Therefore, in the REL5 protocol, IP is carried on E1/T1, called IPoverEl/Tl (IP is carried over the entire E1/T1) and IP over Fractional E1/T1. (IP is carried on part E1/T1).

[5] GSM (Global System Mobile, Global System for Mobile Communications) BTS (Base Transmit)

Station, base station) and BSC (base station

The interface between the controller and the base station controller is only connected in the traditional El/Tl mode. Regardless of the number of users, the mobile operator must use at least one E1/T1 connection to the Abis interface. Therefore, if there are fewer users under the base station, the cost of the mobile operator is too high, and as 3G users continue to increase, 2G users are bound to become less and less.

[6] In order to save costs, general mobile operators (operators that operate both GSM and WCDMA networks) need to place hundreds of GSM BTS and WCDMA NODEBs in the same place, when 3 G-WCDMA systems enter After the mature operation period, the number of 2G-GSM users will enter a shrinking period. As the number of 2G users decreases and the IP transmission cost decreases, the transmission bandwidth of the 2G BTS needs to be reduced to save transmission costs. The Abis interface does not need to completely occupy 1 E1/T1, but only the part is used. The gap can be used, which requires the use of 2G, 3G base station co-transmission technology to divide the bandwidth transmitted to the 3G base station into a 2G base station.

[7] At present, there is no 3G in the prior art.

The IUB interface uses the IP transmission method to implement the 2G3G co-transmission method.

[8] Summary of the invention

[9] The object of the present invention is to provide a method and system for transmitting 2G services through a 3G network, thereby solving the problem of how to implement 2G/3G base station co-transmission when the 3G IUB interface uses the IP transmission mode.

[10] The object of the present invention is achieved by the following technical solutions:

[11] A method of transmitting 2G services over a 3G network, including:

[12] The base station controller RNC and the base station NODEB use the IP transmission mode, and the RNC or NODEB as the sender performs the cross-over processing of the second generation mobile communication 2G service;

[13] The RNC or the NODEB as the sender combines the processed 2G service and the 3G mobile communication 3G service, and synthesizes the 2G service and the 3G service through the transmission network. Transmitted to the NODEB or RNC as the recipient.

[14] A base station controller RNC, comprising:

[15] The BSC side transceiver module is configured to receive the 2G service sent by the BSC and transmit it to the gap intersection and synthesis module; or send the 2G service transmitted by the gap intersection and the synthesis module to the BSC;

[16] The gap intersection and synthesis module is configured to perform the gap intersection processing on the 2G service sent by the BSC side transceiver module, and synthesize the processed gap between the 2G service and the 3G service, and combine the processed The 2G service and the 3G service are transmitted to the transmission side transceiver module; or the combined 2G service and the 3G service transmitted by the transmission side transceiver module are subjected to the gap intersection processing, and the decomposed 2G service is transmitted to the BSC side transceiver module;

[17] The transmission side transceiver module is configured to transmit the 2G service and the 3G service peer that are transmitted through the gap intersection and the synthesis module to the NODEB through the transmission network; or transmit the synthesized 2G service and the 3G service transmitted by the NODEB. Give the gap intersection and synthesis module.

[18] A base station NODEB, including:

[19] The BTS side transceiver module is configured to receive the 2G service sent by the BTS, and transmit the 2G service to the BTS and the synthesis module; or send the 2G service transmitted by the 交叉 gap and the synthesis module to the BTS; [20] The gap intersection and synthesis module is configured to perform the gap intersection processing on the 2G service transmitted by the BTS side transceiver module, and synthesize the processed gap between the 2G service and the 3G service, and combine the processed The 2G service and the 3G service are transmitted to the transmission side transceiver module; or the combined 2G service and the 3G service transmitted by the transmission side transceiver module are subjected to the gap intersection processing, and the decomposed 2G service is transmitted to the BTS side transceiver module;

[21] The transmission side transceiver module is configured to send the 2G service and the 3G service peer that are transmitted by the 交叉 gap intersection and the synthesis module to the RNC through the transmission network; or transmit the synthesized 2G service and the 3G service transmitted by the RNC to The gap intersection and synthesis module.

[22] A system for transmitting 2G services through a 3G network using IP transmission methods, including:

[23] The BSC is used to send the 2G service that needs to be sent to the BTS to the RNC, or to receive the 2G service from the BTS sent by the RNC;

[24] The RNC is configured to receive the 2G service sent by the BSC, perform the gap processing on the 2G service, and synthesize the processed 2G service and the 3G service gap, and synthesize the 2G service. And the 3G service is sent to the NODEB through the transmission network; or, the synthesized 2G service and the 3G service sent by the NODEB through the transmission network are received, and the gapped cross processing is performed, and the decomposed 2G service is sent to the BSC;

[25] The NODEB is configured to receive the 2G service sent by the BTS, perform the gap processing on the 2G service, and synthesize the processed 2G service and the 3G service gap, and synthesize the 2G service. And the 3G service is sent to the RNC through the transmission network; or, the synthesized 2G service and the 3G service sent by the RNC through the transmission network are received, and the gapped cross processing is performed, and the decomposed 2G service is sent to the BTS through the gap crossing function. ;

[26] The BTS is used to send the 2G service that needs to be sent to the BSC to the NODEB, or to receive the 2G service from the BSC sent by the NODEB.

[27] It can be seen from the technical solution provided by the present invention that the present invention transmits 2G services between the BSC and the RNC, the BTS and the NODEB by using the gap crossing function, and the 2G service is transmitted between the RNC and the NODEB. And E1/T1 lines for 3G services. Therefore, the problem of how to implement 2G/3G co-transmission in the case of the 3G IUB interface in the case of IP transmission is solved. It realizes the transmission of 2G services by using 3G transmission, saving 2G transmission cost and simplifying the transmission network. [28] BRIEF DESCRIPTION OF THE DRAWINGS

[29] FIG. 1 is a schematic diagram of networking of an IUB interface in the REL5 protocol in the prior art;

2 is a schematic diagram of an embodiment of a method according to the present invention;

FIG. 3 is a flowchart of a process of an embodiment of the method according to the present invention; FIG.

4 is a schematic structural diagram of an embodiment of a system according to the present invention.

[33] Specific implementation

An embodiment of the present invention provides a method and system for transmitting a 2G service through a 3G network. In the present invention,

The BSC to BTS transmission is forwarded by RNC and NODEB, and the BSC and NODEB complete the gap crossing function. The RNC and the NodeB transmit the 2G and 3G services simultaneously through the IP transmission network.

The embodiment of the present invention is described in detail below with reference to the accompanying drawings. The schematic diagram of the embodiment of the method of the present invention is shown in FIG. 2 . The processing flow of the embodiment of the method is as shown in FIG. 3 , and includes the following steps:

[36] Step 3-1: The BSC sends the 2G service that needs to be sent to the BTS to the RNC.

[37] El is the rate standard for the digital system of the pulse code modulation multiplexing system in Europe. It contains 32 64 kbit/s channels (gap) and the total bandwidth rate is 2.048 Mbit/s, where TS0 is used as The positioning signal, TS1-TS31 can be used to transmit traffic. The transmission physical medium is generally a coaxial cable or a twisted pair.

[38] T1 is the rate standard for the digital system of the pulse code modulation multiplexing system in North America. It contains 24 64 kbit/s channels (gap). All TS1-TS24 can be used to transmit services and transmit physics. The medium is generally twisted pair.

[39] The following describes an embodiment of the present invention by transmitting a service signal between the BSC and the RNC, between the RNC and the NODEB, between the NODEB and the BTS in the E1 manner.

[40] In the embodiment of the present invention, the BSC and the RNC are connected by a cable on the network side.

[41] When the BSC needs to send 2G services to the BTS, the BSC sends the E1 signal to be sent to the RNC's E1-A port through the direct cable. The RNC determines the m gaps required to transmit the 2G service, and switches the m slots required for the 2G service to the m slots of the E1-B port through the internal gap crossing chip. The m gaps before the above exchange and the m gaps after the exchange may not correspond one by one.

[42] Step 3-2. The RNC combines the 2G service and the 3G service into a whole E1 line and sends it to NOD EBo through the transmission network. [43] In this embodiment, IP over Fractional is used between RNC and NODEB.

El (IP is carried on part El) Transmission method.

[44] The RNC combines the m gaps of the above-mentioned exchanged E1-B ports with the remaining 31-m gaps for transmitting 3G services, and synthesizes an entire 31-gap E1 line, and the E1 line Transfer to NODEB via the transport network

[45] Step 3-3. NODEB sends the 2G service to the BTS through the gap crossing function.

[46] After receiving the entire 31-slot El line sent by the RNC, the NODEB decomposes the included 2G service, and sends the m gaps of the 2G service to the BTS through the gap crossing chip. then

, completed the 2G transmission. At the same time, the remaining 31-m gaps for transmitting 3G services are left for use by themselves, and the 3G service transmission is completed.

[47] The upstream direction in which the BTS sends the 2G service to the NODEB is the reverse of the above process, through the process described above for the present invention. It realizes the transmission of 3G吋 2G and 3G by IP.

[48] The schematic structural diagram of the system embodiment of the present invention is shown in FIG. 4, and includes the following modules:

[49] BSC: It is used to send the 2G service that needs to be sent to the BTS to the RNC, and receive the 2G service sent by the RNC through the BSC side transceiver module.

[50] RNC: It is used to receive the 2G service sent by the BSC, and send the 2G service together with the 3G service to the NODEB through the transmission network. Receive 2G services and 3G services sent by NODEB through the transmission network

The 2G service decomposed by the gap crossing and synthesis module is sent to the BSC. Including: gap crossing and synthesis module, BSC side transceiver module and transmission side transceiver module.

[51] The BSC side transceiver module is configured to receive the 2G service sent by the BSC, and transmit the 2G service to the BSC and the synthesis module; and send the 2G service transmitted by the 交叉 gap and the synthesis module to the BSC.

[52] wherein, the gap intersection and synthesis module is used to combine the 2G service sent by the BSC side transceiver module and the 3G service that needs to be sent into a whole E131 gap information, and transmit the information to the transmission side transceiver module.

The E1 line including the 2G service and the 3G service received by the transmission side transceiver module is cross-decomposed, and the decomposed 2G service is transmitted to the BSC side transceiver module.

[53] The transmission side transceiver module is configured to be connected to the transmission network, and the E1 line including the 2G service and the 3G service synthesized by the gap intersection and the synthesis module is sent and received between the NODEBs.

[54] NODEB: It is used to receive the 2G service sent by the BTS, and pass the 2G service and the 3G service together. The transport network is sent to the RNC. Receiving the 2G service and the 3G service sent by the RNC through the transmission network, and transmitting the decomposed 2G service to the BTS through the BTS side transceiver module. Includes: 吋 gap intersection and synthesis module

, BTS side transceiver module and transmission side transceiver module.

[55] The BTS side transceiver module is configured to: receive the 2G service sent by the BTS, and transmit the 2G service to the BTS and the synthesis module; and send the 2G service transmitted by the 交叉 gap and the synthesis module to the BTS.

[56] The gap intersection and synthesis module is used to: combine the 2G service transmitted by the BTS side transceiver module and the 3G service that needs to be sent into a total of 31 gaps of E1, and pass the transmission side transceiver module. The E1 line including the 2G service and the 3G service received by the transmission side transceiver module is decomposed, and the decomposed 2G service is transmitted to the BTS side transceiver module.

[57] The transmission side transceiver module is configured to be connected to the transmission network, and the E1 line including the 2G service and the 3G service synthesized by the gap intersection and the synthesis module is transmitted and received between the RNCs.

[58] BTS: It is used to send the 2G service that needs to be sent to the BSC to the NODEB, and receive the 2G service sent by the NODEB through the gap crossing function.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of within the technical scope disclosed by the present invention. Changes or substitutions are intended to be included within the scope of the invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

Claim

[1] 1. A method for transmitting a 2G service through a 3G network, characterized in that:

The base station controller RNC and the base station NODEB use the IP transmission mode, and the R NC or NODEB as the sender performs the gap crossing processing on the second generation mobile communication 2G service; the RNC or NODEB as the sender will process The subsequent 2G service and the 3G mobile communication 3G service are combined and processed, and the synthesized 2G service and 3G service are transmitted to the NODEB or RNC as the receiver through the transmission network.

[2] 2. The method according to claim 1, wherein the method specifically includes:

The BSC sends the 2G service that needs to be sent to the BTS to the RNC, and the RNC performs the cross-over processing on the 2G service, and combines the processed 2G service and the 3G service gap to synthesize the 2G service. The 3G service is sent to the NODEB through the transmission network; the NODEB acquires the 2G service and the 3G service sent by the RNC, and the 2G service is decomposed by the gap intersection processing, and the 2G service is sent to the BTS. .

[3] The method according to claim 1, wherein the method specifically includes:

The BTS sends the 2G service that needs to be sent to the BSC to the NODEB. The NODEB performs the cross-over processing on the 2G service, and combines the processed 2G service and the 3G service gap to synthesize the 2G service. The 3G service is sent to the RNC through the transmission network; the RNC acquires the 2G service and the 3G service sent by the NODEB, and decomposes the 2G service through the gap processing, and sends the 2G service to the office. Said BSC.

[4] The method according to claim 2 or 3, wherein the IP packet of the 3G service between the RNC and the NODEB is carried on a transmission network carried by a part of the E1/T1 line.

[5] 5. The method according to claim 4, wherein the RNC or NODEB will be the 2

The G service performs the process of processing the gap between the 2G service and the 3G service, and the process includes:

The RNC or the NODEB exchanges a part of the gaps on the port for transmitting the 2G service to a part of the gap on the port for transmitting the 3G service, and combines the part of the gap after the exchange with the part of the 3G service to be transmitted. The gap occupied by the entire E1/T1 line.

[6] 6. A base station controller RNC, comprising: The BSC side transceiver module is configured to receive the 2G service sent by the BSC and transmit it to the gap intersection and synthesis module; or send the 2G service transmitted by the gap intersection and the synthesis module to the BSC; the gap intersection and the synthesis module, The 2G service sent by the BSC side transceiver module is subjected to the splicing process, and the processed 2G service and the 3G service are combined and processed, and the synthesized 2G service and 3G service are transmitted to the transmission side. Transceiver module; or, the combined 2G service and the 3G service transmitted by the transmission side transceiver module are subjected to the gap intersection processing, and the decomposed 2G service is transmitted to the BSC side transceiver module;

The transmission side transceiver module is configured to send the 2G service and the 3G service peer that are transmitted by the gap intersection and the synthesis module to the NODEB through the transmission network; or transmit the synthesized 2G service and the 3G service transmitted by the NODEB to the gap intersection And synthesis modules.

[7] 7. A base station NODEB, which is characterized in that it comprises:

The BTS side transceiver module is configured to receive the 2G service sent by the BTS, and transmit the 2G service to the BSC and the synthesis module; or send the 2G service transmitted by the 交叉 gap and the synthesis module to the BTS; the 交叉 gap intersection and the synthesis module, The 2G service transmitted by the BTS side transceiver module is subjected to the splicing process, and the processed 2G service and the 3G service gap are combined and processed, and the synthesized 2G service and 3G service are transmitted to the transmission side. Transceiver module; or, the composite 2G service and the 3G service transmitted by the transmission side transceiver module are subjected to the gap intersection processing, and the decomposed 2G service is transmitted to the BTS side transceiver module;

The transmitting side transceiver module is configured to send the 2G service and the 3G service peer that are transmitted by the 交叉 gap and the synthesizing module to the RNC through the transmission network; or transmit the synthesized 2G service and the 3G service transmitted by the RNC to the 交叉 slot intersection And synthesis modules.

[8] 8. A system for transmitting 2G services by using a 3G network using IP transmission mode, characterized in that

, including:

The BSC is used to send the 2G service that needs to be sent to the BTS to the RNC, or to receive the 2G service from the BTS sent by the RNC;

The RNC is configured to receive the 2G service sent by the BSC, perform the cross-over processing on the 2G service, and synthesize the processed 2G service and the 3G service gap, and combine the 2G service and the 3G service. Send together to NODEB over the transport network; or, receive NODEB through Transmitting the synthesized 2G service and the 3G service sent by the network, and performing the gap intersection processing, and transmitting the decomposed 2G service to the BSC;

The NODEB is configured to receive the 2G service sent by the BTS, perform the gap processing on the 2G service, and synthesize the processed 2G service and the 3G service gap, and combine the 2G service and the 3G service. And transmitting to the RNC through the transmission network; or receiving the synthesized 2G service and the 3G service sent by the RNC through the transmission network, and performing the gap intersection processing, and transmitting the decomposed 2G service to the BTS through the gap crossing function;

The BTS is used to send the 2G service that needs to be sent to the BSC to the NODEB, or to receive the 2G service from the BSC sent by the NODE B.

[9] 9. The system according to claim 8, wherein the RNC specifically includes:

The BSC side transceiver module is configured to receive the 2G service sent by the BSC and transmit it to the gap intersection and synthesis module; or send the 2G service transmitted by the gap intersection and the synthesis module to the BSC; the gap intersection and the synthesis module, The 2G service sent by the BSC side transceiver module is subjected to the splicing process, and the processed 2G service and the 3G service are combined and processed, and the synthesized 2G service and 3G service are transmitted to the transmission side. Transceiver module; or, the combined 2G service and the 3G service transmitted by the transmission side transceiver module are subjected to the gap intersection processing, and the decomposed 2G service is transmitted to the BSC side transceiver module;

[10] 10. The system according to claim 8 or 9, wherein the NODEB specifically comprises:

The BTS side transceiver module is configured to receive the 2G service sent by the BTS, and transmit the 2G service to the BSC and the synthesis module; or send the 2G service transmitted by the 交叉 gap and the synthesis module to the BTS; the 交叉 gap intersection and the synthesis module, The 2G service transmitted by the BTS side transceiver module is subjected to the splicing process, and the processed 2G service and the 3G service gap are combined and processed, and the synthesized 2G service and 3G service are transmitted to the transmission side. Transceiver module; or, the composite 2G service and the 3G service transmitted by the transmission side transceiver module are subjected to the gap intersection processing, and the decomposed 2G service is transmitted to the BTS side transceiver module; The transmitting side transceiver module is configured to send the 2G service and the 3G service peer that are transmitted by the 交叉 gap and the synthesizing module to the RNC through the transmission network; or transmit the synthesized 2G service and the 3G service transmitted by the RNC to the 交叉 slot intersection And synthesis modules.