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Early media implementation method and device

An implementation method, an early media technology, applied in the field of communication, can solve problems such as bandwidth waste and poor call quality, and achieve the effect of saving bandwidth resources and avoiding mutual interference

Active Publication Date: 2011-06-29
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the bandwidth used by the early media is smaller than the bandwidth of the session media. If the resources allocated by the network side for the calling terminal are suitable for the early media, the session media will cause poor call quality due to insufficient bandwidth; if the resources allocated by the network side for the calling terminal Adapt to session media, then the early media occupies too much bandwidth and wastes bandwidth resources

Method used

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  • Early media implementation method and device
  • Early media implementation method and device
  • Early media implementation method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] Embodiment one, such as figure 1 As shown, a method for implementing early media provided by an embodiment of the present invention includes:

[0101] Step 101: Send a call request to the call session control function entity P-CSCF, and the above call request includes the color ring back tone media session description protocol SDP and the session media SDP;

[0102] The above-mentioned CRBT media SDP includes early media access information supported by the calling terminal, and the above-mentioned session media SDP includes session media access information supported by the calling terminal; the above-mentioned CRBT media can be understood as all early media supported by the calling terminal, for example: For other media such as failure sound media before the session connection is established, in the subsequent embodiments, the early media supported by the calling terminal is taken as an example of CRBT media, and the early media supported by the called terminal is exemp...

Embodiment 2

[0110] Embodiment two, such as Figure 2a , Figure 2b , Figure 2c As shown, the present embodiment takes IMS as the background, the UE supports CRBT and MMTV services respectively, the P-CSCF supports CRBT and MMTV services respectively, the S-CSCF supports CRBT and MMTV services, and the Multimedia Caller Identification Server (Multimedia Caller Identification , MCID AS) supports the chromatic image service, and the MRBT AS supports the CRBT service, including the following steps:

[0111] Step 201: the calling terminal UE initiates an invitation (Invite) request (the Invite request is used for calling, and may be referred to as a call request), if the calling UE supports CRBT media, add session media SDP and CRBT media SDP to the Invite request, The calling UE sends an Invite request to the calling P-CSCF determined in the registration process.

[0112] Step 202: The calling P-CSCF can perform local policy check and Network Address Translation (Network Address Translati...

Embodiment 3

[0148] Embodiment three, such as Figure 3a , Figure 3b As shown, the difference from the second embodiment is that this embodiment includes a media gateway control function entity (Media Gateway Control Function, MGCF), which supports circuit switching (circuit switching, CS) domain color ring service, and may include the following steps:

[0149] Step 301: The calling UE initiates an Invite request (or called: a call request). If the calling UE supports CRBT media, add the session media SDP and CRBT media SDP to the request, and the calling UE sends an invitation request to the calling P identified in the registration process. - CSCF sends Invite request.

[0150] Step 302: The calling P-CSCF can perform local policy check and NAT mapping transformation on the session media SDP and the CRBT media SDP respectively, and the calling P-CSCF sends an Invite request to the calling S-CSCF determined in the registration process, and the calling The S-CSCF triggers the Invite requ...

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Abstract

The embodiment of the invention discloses an early media implementation method and device. The method comprises the following steps: a call request including a color ring media session description protocol (SDP) and a session media SDP to a proxy call session control function (P-CSCF); the color ring media access information returned by the P-CSCF is received; connection of color ring media is set on a network side according to the color ring media access information; the session media access information returned by the P-CSCF is received; and connection of the session media is set on the network side according to the session media access information. The above technical scheme has the benefits that the color ring media SDP and the session media SDP supported by the calling terminal are added to the call request information, and the network side can respectively allocate the color ring media resource and the session media resource according to the color ring media SDP supported by the calling terminal and the session media SDP, so that respective reservation of both the color ring media resource and the session media resource is realized.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to an early media realization method and device. Background technique [0002] The Internet Protocol Multimedia Subsystem (IMS) is a multimedia subsystem defined in the third generation partnership project (Third Generation Partnership Project Release 5, 3GPP R5), which introduces the Session Initiation Protocol (SIP) As a service control protocol, it utilizes the characteristics of SIP's simplicity, easy expansion, and convenient media combination to provide rich multimedia services by separating service control from bearer control. [0003] The main functional entities in IMS include: Call Session Control Function (CSCF), CSCF includes three types of P / I / S-CSCF, which are call control entities used to control user registration, session and other functions; A server (Home Subscriber Server, HSS) is used to centrally manage user subscription data; an application serve...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04W76/02
Inventor 李昌林
Owner HUAWEI TECH CO LTD
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