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Method for implementing concurrent calling function in multimedia calls
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An implementation method and multimedia technology, applied in the communication field, can solve the problem of waste of air interface bearing resources of MC services, and achieve the effect of avoiding the waste of air interface bearing resources
Active Publication Date: 2009-12-23
HUAWEI TECH CO LTD
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[0027] However, although the MC service enables a terminal to make multiple calls at the same time, usually the user only talks to one peer at the same time, and each call uses an independent air interface bearer resource.
Obviously in this case, the MC service causes a waste of bearer resources on the air interface
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example 1
[0116] Method Example 1: Calling User 1 (UE1) establishes a multimedia session with User 2 in a multimedia call; during the call, User 1 maintains the multimedia session with User 2 and initiates a multimedia call with User 3; and User 3. Support and be willing to accept the multimedia call. see Figure 5 shown, including the following main steps:
[0117] (Note: Figure 5 The process of obtaining the roaming number is omitted and not shown. )
[0118] 1. User 1 and User 2 complete the process of establishing a multimedia call.
[0119] During the process of establishing a media stream channel between User 1 and User 2, the path that the H.245 message passes through is UE1 / UE2, MGW, MSC, MGW, and UE2 / UE1. TCS, MUXTBSND, and OLC in the figure are all H.245 messages, which are terminal capability sending messages, multiplex table sending messages, and logical channel opening messages. The regulations are necessary. When the receiving end user receives the above message, th...
example 2
[0123] Method Example 2: Calling User 1 (UE1) establishes a multimedia session with User 2 in a multimedia call; during the call, User 1 maintains the multimedia session with User 2 and initiates a multimedia call with User 3; and User 3 terminals do not support multimedia calls. see Figure 6 shown, including the following main steps:
[0124] (Note: Figure 6 The process of obtaining the roaming number is omitted and not shown. )
[0125] 1. Same as method example 1.
[0126] 2. When the user enters the multimedia call state, user 1 initiates a call hold to user 2. MSCSERVER controls MGW to disconnect the bearer between UE1 and UE2, and can play media stream to user 2 to make it wait comfortably. User 1 initiates a new multimedia call to User 3. When MSC SERVER transfers the call to UE3, it supports Fallback to initiate the call. Since UE3 does not support multimedia calls, the call is finally established in the form of voice. Therefore, the establishment between MGW a...
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Abstract
The invention discloses a method for realizing a parallel calling function of a multimedia call, which is used to solve the problem that the current WCDMA circuit domain does not support the use of the air interface bearing resources of the established multimedia call to make a new call. The method of the invention includes: when the user who is in the first multimedia session initiates the call to keep the HOLD service, the MSC SERVER instructs to disconnect the media stream channel of the first session; and the MSC SERVER uses the bearer on the side of initiating the HOLD to control the MGW Create a new media stream channel with the peer user of the new session; then control the MGW to connect the media stream channel on the peer side of the new session with the corresponding media stream channel on the side where HOLD is initiated to establish the media stream channel required for the second session . According to the method, in the WCDMA circuit domain, the media stream channel on the side where the HOLD is initiated can be used to complete the establishment of a new session, thereby avoiding the waste of air interface bearer resources caused by the use of independent air interface bearer resources for each call.
Description
technical field [0001] The invention relates to the communication field, in particular to a method for realizing the parallel calling function of multimedia calling. Background technique [0002] The mobile circuit domain (CS DOMAIN) multimedia call service is an important service in the third-generation mobile communication system, and one of the symbolic services that distinguish the third-generation mobile communication from the second-generation. This service enables users to see the image of the other party while making a voice call, which is a service with important practical application value. [0003] Starting from the R4 version, the third generation of WCDMA mobile communication has defined a set of system architecture to complete various services, including videophone services. The basic network elements included in this system architecture are: user equipment UE, WCDMA system base station NODE B, WCDMA system base station controller RNC, MGW and MSCSERVER. A bas...
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