CN1269367C - Apparatus and method for processing group data in mobile communication system - Google Patents

Fig. 1 is the block diagram of the general IS-95A/B of expression system.Referring to Fig. 1, from communication terminal 10,20 grouped data sends calls out (transmission calls) by

31,32 and

33 be sent to mobile switching centre (MSC) 40, between MSC 40 and IWF (IWF) (inter-working function) 50, provide internet interface function (hardware and agreement), make that the user can access the Internet 70.

, be used for the network component units of above-mentioned access services herein, for example the

42, and home location register and

41 are connected to MSC 40.

Newly add a packet data serving node (PDSN) 30, made the BTS 21-24 and the

26,27 that receive 3G modulator-demodulator channel can be directly connected to packet data serving node 30.Referring to Fig. 2, with identical in the general IS-95A/B system (except checking and other business), the Packet Service that is used for access the Internet 70 sends to call out and carries out signaling process at MSC 40.Then, the actual packet business is connected to PDSN 30 from BSC 26,27, rather than by MSC 40 and IWF 50.

The IS-95A/B system of Fig. 1 comprises the IWF50 that has with

30 identical functions of Fig. 2.But it is because MSC 40 can't be with the high speed processing grouped data in the environment of the IS-95A/B of Fig. 1 system that the IS-95C system of Fig. 2 adopts

30.

But, although

26,27 directly send to

30 by the

30 that sets up among Fig. 2 with Packet Service, because to the backwards compatibility of IS-95A/B business (if mobile terminal accessing IS-95C system that is used for general IS-95A/B system, should provide corresponding service with the condition identical) with visit IS-95A/B network, be difficult to get rid of general MSC40, IWF method of attachment and IWF system.

Support under the situation of the graphic service in the group mode as in the

14 H.323 in the communication system shown in Fig. 1 and 2, comprise that the multi-medium data of image is connected to the H.323 support image device 71 (notebook among Fig. 2) of

70 by PDSN 30 visits in group mode, make that H.323

14 receives corresponding service.

More than explained mobile radio station (mobile to land) calling of group mode to land.To send calling from

14 and send to a user who is connected with

70.

Under the situation of mobile-to-mobile (mobile to mobile) packet call, i.e. the H.323 calling of

14, business provides with access method does not also have standardization.

Fig. 3 is the block diagram of expression according to IS-95C of the present invention system.Referring to Fig. 3, the IS-95C system comprises: a plurality of base stations (BTS) 210-240; Base station controller (BSC) 300a, 300b, be used to control the operation of BTS 210-240, when being grouped data, input signal supports Packet data service, execution is as link layer protocol (ISLP) between the system of the interface protocol between BSC and the mobile switching centre (MSC), time-division multiplex packet data is decoded as input signal pulse code modulated (PCM) data when input signal is compressed speech data, and the PCM data imported of coding; Mobile switching centre (MSC) 400 is used for exchange from

300a, the voice call of 300b or the path of grouped data, or exchange is the voice call of destination or the path of grouped data with its regional BTS; Voice mail server 410 and home location register and authentication center 420 all are connected to MSC 400; Be connected to the charge system 510 of MSC 400, be used to collect each user's expense; IWF (IWF) 520 has the ancestral home and the foreign agent functionality of the IP address aligning of the transmission calling that is used for support terminal, is used for MSC 400 is linked to another network; With the data core network that is connected to IWF 520 (DCN) 530, be used to handle Packet data service and visit external network.

Herein, BSC 300a, 300b comprise at least one vocoder 310.As shown in Figure 4, each

310 comprises: CPU (CPU) 311, have and be used for by judging that input signal is that voice call or grouped data come control signal to handle the

311a in path, with be used for the

311b that ISLP handles the grouped data imported and carries out HDLC control, on

311b, ISLP is installed; At least one digital signal processor (DSP) 312a, 312n is used for the compressed speech data of input is decoded as the PCM data and the gained data are sent to MSC 400, perhaps sends to BTS 210 with the PCM digital coding of input and with the gained data;

313 is used for receiving from DSP 312a, the time division multiplexing voice signal of 312n and from the time-division multiplex packet data signal of the

311b of

311, and signal outputed to MSC 400.

According to a preferred embodiment of the invention, in a

311, realize following functional part: be used for by judging that input signal is that voice call or grouped data come control signal to handle the

311a in path, and have ISLP, carry out ISLP between BSC and the MSC, be used for when input signal is grouped data, supporting Packet data service and time division

311b through the grouped data of ISLP processing as BSC and MSC interface protocol (in IS-728, defining).

But also

311 is as

311a, and implements

311b separately.

Compare with the conventional IS-95C system of Fig. 2, the IS-95C system of Fig. 3 does not adopt and is connected to

300a, the particular packet data serving node (PDSN) of 300b, but providing ancestral home and foreign agent functionality to aim at (simple IP or mobile radio station IP) to support the mobile terminal IP address that sends calling about mobile radio station to land to IWF 520, this has reduced system and has set up expense and improved application.

Under the situation of system shown in Figure 2, can be only by the time-division multiplexing function that is used to send speech information at

300a, send data between 300b and the MSC 400.But, according to the present invention, having improved

300a, the

310 of 300b is to send grouped data by the time division multiplexing path.

Therefore, the vocoder of the communication system of Fig. 3 and Fig. 4 can send mobile radio station to land or mobile-to-mobile grouped data by MSC 400.When the user capture IP network, from

300a, 300b sends to PDSN with the group mode data, directly send to the MSC that there is part in counterpart terminal by between a MSC and other MSC or the path between this MSC and the PDSN then, rather than send to a terminal that is used for wired packet data service by the route of internet, therefore easily support the business of mobile-to-mobile grouped data (receipt of call).That is, can be by the function of exchange support call exchange of MSC.

On the other hand, can not pass through PDSN (referring to Fig. 2) and send the mobile-to-mobile grouped data., can adopt the

310 and the MSC 400 that are used for voice call to be used for packet data call herein, thereby reduce to be used for capacity and necessity of the network equipment that the internet connects.As a result, can significantly reduce initial cost.

310 shown in Fig. 4 is used for by MSC 400 from portable terminal to the catv terminal visit data, and echo eliminating function is provided.According to the present invention, when input signal was grouped data,

310 was provided with ISLP (defining) in IS-728, and ISLP is the interface protocol between BSC and MSC that is used for general IS-95B data service.

On the other hand, send transmission data (being used to support the HW (

311b) of 384Kbps) with the speed that is suitable for IS-95C.Processor chips as CPU realize in a chip recently.Therefore, be easy to support H/W and need not to increase dedicated outside plant or glue logic.

As shown in Figure 4, when sending voice call by vocoder,

311 sends to MSC 400 by

313 with the PCM data that produce among the DSP 312a-312n, perhaps carries out rightabout operation.When sending the group mode business datum by vocoder, CPU311 ISLP handles this data, by these data of

311b time division multiplexing, and data is sent to switch 313, rather than data are sent to DSP 312a-312n.

At this moment,

311 is according to judging that from the information of

210 inputs input signal is voice signal or grouped data.Distinguish voice signal and grouped data by the particular key of a user terminal.Be input to the CPU of BSC for information about from terminal by BTS.

When voice call is opposite with packet data call (, when input signal is a voice call, do not send packet call, or vice versa), perhaps when a terminal connected voice call and packet data call simultaneously,

311 provided the voice and packet data concurrent service of one of business option of IS-95C.

At first, the

311a of

311 distinguishes process (S1) by judging that input signal is voice call or packet data call, carry out the calling that is used for selective call processing path.

On the other hand, when input signal is grouped data, carry out the packet data processes process, make

311b ISLP handle this grouped data, then the resulting data of time division multiplexing (S3).

1. mobile communication system comprises:

Mobile radio station;

Be connected to the base station of mobile radio station;

Be connected to the base station controller of base station, have vocoder, this vocoder is used for the path and the visit grouping of control input signals;

Be connected to the mobile switching centre of base station controller;

IWF is used for mobile switching centre is linked to another network;

Be connected to the data core network of IWF, be used to handle Packet data service and visit external network.

2. according to the system of claim 1, wherein IWF is connected to mobile switching centre, have and be used to support the origin agent function and/or the foreign agent functionality of aiming at, and mobile switching centre is linked to another network from the IP address that the transmission of mobile radio station is called out.

3. according to the system of claim 1, wherein vocoder comprises:

CPU is used for by judging that input signal is that voice call or grouped data come control signal to handle the path;

At least one digital signal processor is used to handle the voice signal from CPU;

Hdlc controller is used for the grouped data that time division multiplexing is distinguished in CPU;

Switch is used to exchange time-multiplexed speech processing signals and/or packet data processes signal from digital signal processor and hdlc controller.

4. mobile communication system with vocoder, wherein vocoder comprises:

CPU is used for by judging that input signal is that voice call or grouped data come control signal to handle the path;

At least one digital signal processor is used to handle the voice signal from CPU;

Switch is used to exchange from the speech processing signals of digital signal processor and/or from the time-multiplexed packet data processes signal of CPU.

5. according to the system of claim 4, wherein CPU comprises:

Core is used for by judging that input signal is that voice call or grouped data come control signal to handle the path;

Hdlc controller is used for the grouped data that time division multiplexing is distinguished in core.

6. according to the system of claim 4, wherein digital signal processor is decoded as the PCM data with the voice data of input, and the gained data are sent to mobile switching centre, perhaps sends to the base station with the PCM digital coding of input and with the gained data.

7. the method for a deal with data in mobile communication system may further comprise the steps:

By judging that in base station controller input signal is that voice call or packet call data distinguish that a calling is to select signal processing path;

If the calling of being distinguished is a packet call, then handles the predetermined protocol that is used to connect base station controller and mobile switching centre, and carry out time division multiplexing by scheduled control unit; And

Data processing signal according to this packet call switching time division multiplex.

8. according to the method for claim 7, further comprise step: in mobile switching centre, exchange is from the voice call of base station controller or the path of grouped data, also exchanging with its regional base station is the voice call of destination or the path of grouped data, and carries out the signaling process that is used for system verification and professional control.

9. according to the method for claim 7, further comprise step: support the ancestral home and/or the foreign agent functionality of aiming at mobile switching centre to be linked to another network at an IWF place from the IP address that the transmission of mobile radio station is called out by use being used to of increasing newly.

10. according to the method for claim 7, further comprise step: be connected to the data core network of IWF, by access to the Internet one external network to handle Packet data service.

11. according to the method for claim 7, wherein when the described packet call data of input, these packet call data of hdlc controller time division multiplexing by corresponding to described scheduled control unit send it to the TDM switch then.

12. method according to claim 7 or 11, wherein when the described packet call data of input, between base station controller and mobile switching centre,, send it to the TDM switch then by having these packet call data of hdlc controller time division multiplexing corresponding to the interface protocol of described predetermined protocol.