Method and apparatus for detecting service style
A technology of business type and codec method, which is applied in the field of GMSC's detection and processing of data services, to ensure the effect of smooth completion
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Embodiment 1
[0032] Embodiment 1: The called party is a single-number mobile user
[0033] Typical applications of data services under 3GPP R4 networking are as follows: figure 1 As shown, the incoming call enters through the GMSC and goes to the called VMSC (Visited Mobile Switching Center) for MT (mobile terminating) calls. The incoming call can use ISUP (ISDN User Part) signaling, and GMSC to VMSC uses For IP bearer, BICC (Bearer Independent Call Control Protocol) signaling is used between offices.
[0034] Such as figure 1 As shown. The process of this embodiment mainly includes the following steps:
[0035] 1. After receiving the IAM message, the GMSC sends an SRI message to the HLR;
[0036] 2. The HLR judges whether the call is a voice service call or a data service call according to the subscription information of the called party, and then sends an SRI_ACK message to the GMSC, in which an optional cell basicservice code is added to carry the service type of the call informatio...
Embodiment 2
[0044] Embodiment 2: The called party is a dual-number mobile user
[0045] For dual-number mobile subscribers, according to different voice and data subscription services, when the gateway office GMSC queries the routing data to the HLR, the HLR judges whether the call is a data service or a voice service according to the corresponding relationship 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, carrying service type information. The GMSC can send different information to the corresponding gateway according to the call type. Codec establishes call bearer: For voice calls, the compression codec algorithm is used, and for data service calls, G.711 transparent transmission is used to establish call bearers.
[0046] The process of this embodiment is as follows figure 2 shown, including the following steps:
[0047] 1. Af...
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