CN100389622C - Method and device for realizing uninterrupted 2G service during co-transmission of 3G and 2G networks - Google Patents

Abstract

The present invention provides a method and a device with uninterrupted 2G service when 3G and 2G are simultaneously transmitted. When the 3G and the 2G are simultaneously transmitted, a logic circuit is arranged in a 3G base station controller. When the 3G base station controller can not carry out time slot cross processing on the 2G service, a transmission line of a 2G base station controller is connected with a transmission line of the 3G base station controller through the logic circuit, and the logic circuit is used for transmitting the 2G service. The method of the present invention can guarantee the normal transmission of the 2G service between the 2G base station controller and the 2G base station when the time slot cross function of the 3G base station controller is invalid due to the reasons of reset, etc.

Description

Method and device for realizing uninterrupted 2G service during co-transmission of 3G and 2G networks

technical field

The invention relates to the field of network communication, in particular to a method for realizing uninterrupted 2G services when 3G and 2G networks are co-transmitted.

Background technique

The interface between the BTS (base station) and the BSC (base station controller) of the GSM (Global System for Mobile Communications) network (namely the Abis interface) is generally connected in the traditional E1T1 mode, and its network diagram is shown in Figure 1. In practical applications, regardless of the number of users connected under the BTS, mobile operators must use at least one E1 to connect to the Abis interface. If there are fewer users connected under the BTS, the E1 connection may only occupy a few time slots of one E1 , such as TS1-TS10, the remaining time slots are wasted. Thereby, the cost of the mobile operator is wasted.

The interface between NODEB (base station) and RNC (base station controller) of 3G WCDMA (Wideband Code Division Multiple Access) system (i.e. IUB interface) is generally connected by traditional E1T1 mode, and its network diagram is shown in Figure 2 . In the case of few early deployment users, mobile operators must also use at least one E1 to connect to the IUB interface, which also has the problem of cost waste.

Therefore, for the purpose of saving costs, operators who operate both GSM and WCDMA networks generally adopt NodeB and BTS co-site and co-transmission when building WCDMA networks, which can greatly improve the efficiency of existing equipment and transmission resources. utilization rate. The detailed description of the technology of NodeB and BTS co-site co-transmission is as follows:

In many areas, the transmission resources between the BTS and BSC of the GSM network often have certain redundancy. Therefore, in the early stage of WCDMA network construction, several 64Kbit/s time slots can be separated from the redundant 2Mbit/s E1 of the GSM network for RAN transmission of the WCDMA network.

At the same time, in order to save costs, operators who generally operate both GSM and WCDMA networks need to place hundreds of GSM BTSs and WCDMA NODEBs in the same place. When the 3G-WCDMA system enters the mature operation period, the number of 2G-GSM users enters the shrinking period. With the reduction of GSM users, the transmission bandwidth connected to the BTS needs to be reduced to save transmission costs. At this time, the GSM network does not need One E1 is completely occupied, and only part of the time slots of E1 can be used. Therefore, the 2G3G base station co-transmission technology is used to allocate most of the E1 to 3G-WCDMA users, and the E1 bandwidth of NODEB is divided into part of the time slots for 2G A schematic diagram of a network of a base station is shown in FIG. 3 .

As shown in Figure 3, an E1 line from the BSC can be distributed to E1-1/E1-2/E1-3 through the RNC to complete the transmission between the three base stations BTS1, BTS2, and BTS3 and the BSC. Therefore, the interface between 2G BSC and BTS does not need to pull a single E1/T1 line, but uses the transmission between 3G RNC and NODEB to transmit GSM network services through the WCDMA network to allocate some time slots to the GSM network .

It can be seen from Figure 3 that the RNC and NODEB of 3G need to realize the function of E1T1 time slot crossover. The processing procedure of the E1T1 time slot crossover function is as follows:

RNC crosses some time slots (such as TS1-TS10) of E1 (tentatively named E1-A) delivered by BSC to TS1-TS10 of E1-1 of RNC, and crosses TS11-TS20 of E1-A to E1 of RNC TS11-TS20 of -2, cross TS21-TS30 of E1-A to TS21-TS30 of E1-3 of RNC.

Afterwards, E1-1, E1-2 and E1-3 combine the time slots of 2G services delivered by the BSC and the time slots of their own 3G services into a complete E1, and then input them to the 2G and 3G transmission equipment respectively. For example, E1-1 combines the TS1-TS10 delivered by the BSC and its own 3G service time slots TS11-TS31 into a complete E1 (31 time slots of all TS1-TS31), and then sends it to several kilometers or NODEB1 dozens of kilometers away. NODEB1 keeps the 3G service time slots it needs, and transmits the 2G service time slots, such as the E1-A time slots TS1-TS10 delivered by the BSC, to the 2G BTS1. Thus, the purpose of 2G3G co-transmission is achieved.

The disadvantages of the above-mentioned existing 2G3G co-transmission technology are:

All the E1 sent by the BSC to the BTS through the RNC will be affected by the RNC. If the RNC fails to work normally, for example, the RNC is reset, the information of the 2G BSC cannot be sent to the BTS, and all 2G services will be interrupted.

In fact, because the 3G RNC equipment is a newly developed product, it is not very mature, and needs frequent software and even hardware upgrades. During the software or hardware upgrade process, the RNC needs to be reset. Therefore, the above-mentioned E1T1 time slot crossover function It will fail due to the reset of the RNC, and all BTSs using the 2G3G co-transmission technology will be interrupted, which seriously affects the use of 2G users, causing 2G users to drop calls or be unable to access the Internet.

Contents of the invention

In view of the problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a method and device for realizing uninterrupted 2G services when 3G and 2G networks are co-transmitted, so that when the time slot crossover function of the 3G base station controller is reset When other reasons fail, the normal transmission of 2G services between the 2G base station controller and the 2G base station is guaranteed.

The purpose of the present invention is achieved through the following technical solutions:

A method for realizing uninterrupted 2G services when 3G and 2G networks are co-transmitted, comprising:

A. When the 3G and 2G networks are co-transmitted, a logic circuit is set in the 3G base station controller;

B. When the 3G base station controller cannot perform time slot crossover processing on 2G services, connect the transmission line of the 2G base station controller and the transmission line of the 3G base station controller through the logic circuit, and use the logic circuit to perform 2G Transmission of business.

Described step A specifically comprises:

When 3G and 2G are co-transmitted, in the 3G base station controller, a logic circuit is set between the 2G transmission line for transmitting 2G services from the 2G base station controller to the 3G base station controller and the transmission line for transmitting services from the 3G base station controller to the 3G base station.

Described step A also includes:

When the 3G base station controller can perform time slot interleaving processing on 2G services, the set logic circuit is disabled.

Described step B specifically comprises:

B1. When the 3G base station controller cannot perform time slot crossover processing on the 2G service, connect the transmission line of the 2G base station controller and the transmission line of the 3G base station controller through the logic circuit;

B2, passing the 2G service transmitted from the 2G base station controller to the 3G base station controller through the logic circuit to each transmission line of the 3G base station controller, and passing the 2G service to the 3G base station through the transmission line, Then pass it to the 2G base station.

The 3G includes Wideband Code Division Multiple Access WCDMA or CDMA2000, and the 2G includes Global System for Mobile Communications GSM or General Packet Radio Service GPRS.

The transmission line includes E1 or T1.

A device for realizing uninterrupted 2G services when 3G and 2G networks are co-transmitted, the device is implemented by a 3G base station controller, and the 3G base station controller includes:

Logic circuit module: when the time slot crossover function of the 3G base station controller cannot perform time slot crossover processing on the 2G service, connect the transmission lines of the 2G base station controller and each transmission line of the 3G base station controller through a logic circuit, and connect the 2G The 2G service of the base station controller is crossed to each transmission line of the 3G base station controller.

As can be seen from the technical solution provided by the present invention above, the present invention sets a logic circuit in the 3G base station controller when the 3G and 2G networks transmit together, so that the time slot crossover function of the 3G base station controller can be realized due to reset, etc. When the cause fails, ensure the normal transmission of 2G services between the 2G base station controller and the 2G base station.

It avoids that when the 2G network and the WCDMA or CDMA2000 network are co-transmitted, a large number of 2G users cannot access the Internet or make calls during the process before and after the RNC reset.

Description of drawings

Figure 1 is a schematic diagram of the network when the interface between the BTS and the BSC of the GSM network is connected in the traditional E1T1 mode;

Fig. 2 is a schematic diagram of networking when the interface between NODEB and RNC of the 3G WCDMA system is connected in the traditional E1T1 mode;

Figure 3 is a schematic diagram of a network that divides the bandwidth of the 3G base station into a part of time slots for the 2G base station when the 2G3G base station co-transmission technology is used;

Fig. 4 is the processing flowchart of the specific implementation mode of the method of the present invention;

Fig. 5 is a schematic diagram of a logic circuit arranged between E1-A of the BSC and E1-1, E1-2 and E1-3 of the RNC in the embodiment of the present invention;

Fig. 6 is a structural diagram of a specific implementation manner of the device of the present invention.

Detailed ways

The present invention provides a method and device for realizing uninterrupted 2G services when 3G and 2G networks are co-transmitted. The transmission line of the 2G base station controller is connected with the transmission line of the 3G base station controller, and the logic circuit is used to transmit 2G services.

Describe the method of the present invention in detail below in conjunction with accompanying drawing, represent 2G network with GSM, WCDMA represent 3G network as example, the processing flow of the specific implementation mode of method of the present invention is as shown in Figure 4, comprises the following steps:

Step 4-1. Set up a logic circuit between the transmission line of the BSC and the transmission line of the RNC. Under normal circumstances, disable the logic circuit.

When the GSM network and the WCDMA network are co-transmitting, a logic circuit is set between the transmission line of the BSC and the transmission line of the RNC, and the logic circuit is disabled when the RNC is in normal operation. The transmission line of the BSC and the transmission line of the RNC include E1 or T1.

For example, as shown in Figure 5, a logic circuit is set between E1-A of the BSC and E1-1, E1-2, and E1-3 of the RNC (the dotted line in Figure 5), when the RNC is in normal operation When , the logic circuit is disabled by a logic switch. At this time, E1-1, E1-2, and E1-3 are independent of each other. The 2G service on the E1-A of the BSC is delivered to the E1-1/E1-2/E1-3 of the RNC through the time slot crossover function of the RNC.

Step 4-2. When the RNC is reset, connect the above logic circuits through a logic switch.

When the RNC is reset due to a software or hardware upgrade process, the time slot crossing function of the RNC will be invalid. At this time, the logic circuits set above are not reset, and the logic circuits set above are connected through a logic switch. That is to connect E1-A of the BSC with E1-1, E1-2 and E1-3 of the RNC.

Step 4-3. Perform 2G service transmission between the BSC and the BTS through the above logic circuit.

After connecting the E1-A of the BSC with the E1-1, E1-2 and E1-3 of the RNC through the above logic circuit, the 2G signal on the E1-A can be unconditionally short After receiving the E1-1/E1-2/E1-3, the 2G service is transmitted to the 3G base station through the E1-1/E1-2/E1-3, and then to the 2G base station. Thus, the transmission of 2G services is performed between the BSC and the BTS. Therefore, during the reset process of the RNC, the normal transmission of the 2G service between the BSC and the BTS can also be guaranteed.

When the RNC returns to normal, the time slot crossover function of the RNC can be used. Then, the logic link is disabled through the logic switch, and the configuration data connection under normal conditions is resumed, and the 2G service transmission between the BSC and the BTS is completed through the time slot crossover function of the RNC.

In summary, using the method of the present invention, in the process before and after the RNC reset, there is no bad influence on GSM users such as being unable to access the Internet and unable to communicate.

The method of the present invention is also applicable to the co-transmission of other 3G networks and 2G networks. For example: WCDMA and GPRS (General Packet Radio Service) network, CDMA2000 and GPRS network, CDMA2000 and GSM network, etc.

When the 3G and 2G networks provided by the present invention are co-transmitted, the structural diagram of the specific implementation of the device for realizing the uninterrupted 2G service is shown in Figure 6. The device is implemented by a 3G base station controller and includes the following modules:

Logic circuit module: When the time slot crossover function of the 3G base station controller fails due to reset and other reasons, connect the transmission line of the 2G base station controller and the transmission line of the 3G base station controller through a logic circuit, and connect the 2G The service is crossed to each transmission line of the 3G base station controller.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (7)

1. realize the professional unbroken method of 2G when 3G and 2G network transmit altogether, it is characterized in that, comprising:

A, when 3G and 2G network transmit altogether, in the NodeB controller, logical circuit is set;

B, when described NodeB controller can not carry out the time slot cross processing to the 2G business, by described logical circuit the transmission line of 2G base station controller and the transmission line of described NodeB controller are coupled together, utilize this logical circuit to carry out the transmission of 2G business.

2. method according to claim 1 is characterized in that, described steps A specifically comprises:

When 3G and 2G network transmit altogether, in the NodeB controller, between the transmission line of NodeB transport service, logical circuit is set to the 2G transmission line and the NodeB controller of NodeB controller transmission 2G business at the 2G base station controller.

3. method according to claim 2 is characterized in that, described steps A also comprises:

When described NodeB controller can carry out the time slot cross processing to the 2G business, the logical circuit of described setting is not enabled.

4. according to claim 1,2 or 3 described methods, it is characterized in that described step B specifically comprises:

B1, when described NodeB controller can not carry out the time slot cross processing to the 2G business, by described logical circuit the transmission line of 2G base station controller and the transmission line of described NodeB controller are coupled together;

B2, the 2G business that described 2G base station controller is passed to described NodeB controller by described logical circuit are crossed to each transmission line of described NodeB controller, give NodeB by this transmission line with described 2G service delivery, pass to the 2G base station again.

5. method according to claim 1 is characterized in that described 3G comprises Wideband Code Division Multiple Access (WCDMA) WCDMA or CDMA2000, and described 2G comprises global system for mobile communications GSM or general packet radio service gprs.

6. method according to claim 1 is characterized in that described transmission line comprises E1 or T1.

7. realize the professional unbroken device of 2G when 3G and 2G network transmit altogether, this device is realized by the NodeB controller, it is characterized in that, described NodeB controller comprises:

Application of logic circuit module: when the Timeslot cross function of NodeB controller can not carry out the time slot cross processing to the 2G business, by logical circuit the transmission line of 2G base station controller and each transmission line of NodeB controller are coupled together, the 2G business of described 2G base station controller is crossed to each transmission line of described NodeB controller.

Images