Method and device for performing circuit domain services
A circuit domain service and circuit domain technology, which is applied in the field of circuit domain services, can solve the problems of inability to determine whether the target cell supports circuit domain services, and UEs cannot make circuit domain calls normally, so as to improve efficiency and reduce handover delay. Effect
Active Publication Date: 2009-09-30
HUAWEI TECH CO LTD
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Problems solved by technology
In addition, in the future, HSPA+ and other networks that support packet domain may support circuit domain services, but based on the need to share traffic, it may also need to be redirected or switched to cells that support circuit domain services in other networks
[0006] The inventors of the present invention found that the defect of the prior art is that the access network entity of the PS-supporting network cannot judge whether the target cell in other networks supports CS domain services when performing a handover decision.
Therefore, the source cell may handover the UE to a target cell that does not support circuit domain services, so that the UE cannot make normal CS domain calls
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[0019] According to the embodiment of the present invention, after receiving the CS domain call request from the terminal, the access network entity in the PS domain-supporting network selects a cell supporting CS domain services as the target cell according to the type information of the candidate target cell, and then switches the terminal to the selected target cell. The cell types here include cells supporting CS domain services and cells not supporting CS domain services. The access network entity here may be an enhanced base station eNB or an evolved base station NB+, or other entities with similar functions.
[0020] According to the embodiment of the present invention, after receiving the terminal's circuit domain call request, the access network entity in the network supporting the packet domain can inform the target cell or the intermediate entity of the circuit domain indication information, and the circuit domain indication information is used to indicate the hando...
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The invention discloses a method for performing circuit domain services. According to the method, after a circuit domain call request sent by a terminal in a network supporting packet domain is received, a candidate target cell supporting the circuit domain services is selected as a target cell according to type information of candidate target cells; or whether the target cell supports the circuit domain services or not is judged according to a switching response message returned by the target cell or an associative entity; therefore, the method avoids switching UE to a cell not supporting the circuit domain services, improves the switching efficiency and reduces the switching delay. The invention also discloses a device for the circuit domain services.
Description
technical field [0001] The present invention relates to a mobile communication system, in particular to a technology for conducting circuit domain services. Background technique [0002] With the continuous development of mobile network technology and the maturity of IP-based technology, higher requirements are placed on the speed and access delay of mobile communication networks. In order to ensure the competitiveness of the 3GPP (Third Generation Partnership Project) system for 10 years or more, an access technology evolution work SAE / LTE (System Architecture Evolution / Long Term Evolution, system architecture evolution / long-term evolution) It is being carried out within the 3GPP organization. Some of the most important parts of this type of technological evolution include: reduced delay and response time, higher user data rates, enhanced system capacity and coverage, and reduced overall cost for operators. In addition, in order to make full use of the frequency of UMTS (...
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Inventor 杨艳梅蔺波
Owner HUAWEI TECH CO LTD