A method and apparatus for detecting service style
A technology of business type and encoding and decoding method, which is applied in the field of detection and processing of data services by GMSC, to ensure the effect of smooth completion
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Embodiment 1
[0035] Embodiment 1: The called party is a single-number mobile user
[0036] The typical application of data services under the 3GPP R4 network is shown in Figure 1. Incoming calls enter through GMSC and go to the called VMSC (Visited Mobile Switching Center mobile terminal office) for MT (mobile terminating) calls. The incoming call can use ISUP (ISDN). User Part ISDN user part) signaling, GMSC to VMSC adopts IP bearer, and BICC (Bearer Independent Call Control Protocol bearer independent call control protocol) signaling is used between offices.
[0037] As shown in Figure 1, the process of this embodiment mainly includes the following steps:
[0038] 1. After receiving the IAM message, the GMSC sends an SRI message to the HLR;
[0039] 2. The HLR judges whether the call is a voice service call or a data service call based on the subscription information of the called party, and then sends an SRI_ACK message to the GMSC. The optional cell basicservice code is added to the messag...
Embodiment 2
[0047] Embodiment 2: The called is a dual-number mobile user
[0048] For dual-number mobile users, according to the different voice and data subscription services, when the gateway office GMSC inquires the routing data from the HLR, the HLR determines whether the call is a data service or a voice service according to the correspondence between the called subscription information and the called number, and then Return the SRI-ACK message to the GMSC, and add optional information elements in the SRI-ACK message, such as basic service code, which carries information about the service type. According to the type of this call, the GMSC can issue different information to the corresponding gateway. Codec establishes the call bearer: for voice calls, the compression codec algorithm is used, and for data service calls, the call bearer is established by G.711 transparent transmission.
[0049] The flow of this embodiment is shown in Figure 2, and includes the following steps:
[0050] 1. A...
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