Direct retrying method in call request
A call request, direct technology, applied in the direction of electrical components, radio/inductive link selection arrangements, selection devices, etc., can solve problems such as failed to achieve expected retries, voice call failures, and inability to effectively use 2G network resources
Active Publication Date: 2009-02-04
CHINA MOBILE COMM GRP CO LTD
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Problems solved by technology
[0018] First, if the UE / MS returns to the 3G network successfully, the expected purpose of retrying the 3G user directly to the 2G network during the call establishment process is not achieved, and the resources of the 2G network cannot be effectively utilized;
[0019] Second, if the UE / MS fails to return to the 3G network (for example: the signal quality of the 3G network is very poor at this time, which may cause the UE to fail to return to the 3G network), the voice call will fail, and the user experience will deteriorate. Did not achieve the purpose of retrying 3G users directly to the 2G network during the call establishment process, and also cannot effectively use the resources of the 2G network
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[0038] In the present invention, when retrying the network, the network side sends a cell list to the terminal, which can connect to multiple cells, and the mobile terminal can initiate connections to multiple cells, which improves the success rate of retry and effectively utilizes existing network resources .
[0039] Such as figure 2 As shown, it is a flowchart of an embodiment of the direct retry method in the call request of the present invention, including the following steps:
[0040] Step 101, the 3G MSC sends the radio access bearer assignment request information RAB Assignment Request to the 3G RNS according to the received call request, the assignment request information indicates that the call request is a call request under the 3G network; the call request is a voice call request or streaming call request, etc.;
[0041]Step 102, if the condition of direct retry is reached, then the 3G RNS returns the response information RAB Assignment Response and the retry re...
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Present invention relates to a direct operation retry in call request. It contains 3 G switching center transmitting calling message to 3G wireless networks according to received call request, if satisfying direct operation retry condition then feeding back 2 G network response and containing direct operation retry 2 G network target cell list test request message.3mobile switching center transmitting switching containing said list to G mobile switching center, then transmitting switching request message target cell list to base station controller, feeding back list including modified target cell, target cell frequency and target cell identifying number, finally transmitting said modified target cell list to originating call request mobile terminal and connecting with these target cell. Said invention increases connected target cell number and raises direct operation retry success rate.
Description
technical field [0001] The invention relates to a direct retry method in a call request, in particular to a method capable of multiple direct retry in a call request. Background technique [0002] With the development of the times, the upgrading of the communication system is also very fast. Although the new communication network must replace the original communication network, but in the early stage of the new communication network's maturity, the network coverage is not good, and the carrying capacity is relatively small. How to utilize the original communication network is an important issue before people. [0003] The so-called direct retry (Direct Retry) refers to that when the mobile terminal initiates a call on the 3G network, in order to avoid network congestion, etc., it can directly transfer to the 2G network handover, such as figure 1 Shown is the signaling diagram of the existing 3G network-based call to the direct retry of the 2G network, (the signaling in the ...
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IPC IPC(8): H04Q7/38H04Q7/22H04W4/16H04W36/14
Inventor 刘佳李新
Owner CHINA MOBILE COMM GRP CO LTD