Realizing method and system for cell group with same pseudorandom noise (PN) based on code division multiple access (CDMA) cluster system
A technology of a trunking system and an implementation method, which is applied in the directions of broadcast service distribution, electrical components, connection management, etc., and can solve the problem of high switching frequency of the CDMA trunking service system, prone to call drop, and inability to support the CDMA trunking service and other problems, to reduce the switching frequency of the system and avoid the effect of dropped calls
Active Publication Date: 2011-03-16
HUAWEI TEHCHNOLOGIES CO LTD
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Problems solved by technology
Due to the differences between trunking services and ordinary voice services in terms of physical channel establishment methods, the existing method of using the same PN in adjacent cells of ordinary voice services cannot support CDMA trunking services, that is, when the cell radius is small and the terminal moves In scenarios such as high speed, CDMA trunking services still have problems such as high system switching frequency and easy call drop
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[0033] The basic idea of the present invention is: the base station system configures the same PN cell group, and when the terminal initiates a cluster call under the same PN cell, the same PN cell exists in the sectors involved in all users corresponding to the cluster call, and the same PN cell has been The PN cell group establishes channel resources, then the base station system maintains the trunking call; the same PN cell exists in the sectors involved in all users corresponding to the trunking call, and the base station system does not establish channel resources for the same PN cell group, then the base station system is The same-PN cell group establishes channel resources and maintains a cluster call.
[0034] The implementation of the technical solution will be further described in detail below in conjunction with the accompanying drawings.
[0035] figure 1 It is a schematic flow diagram of the implementation method of the same PN cell group based on the code divi...
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The invention discloses a realizing method for a cell group with same pseudorandom noise (PN) based on a code division multiple access (CDMA) cluster system. In the realizing method, a terminal initiates cluster calling under cells with the same PN; a base station system judges whether sectors related to all the users corresponding to the cluster calling intensively are centralized in the same PN cell, and the base station system constructs channel resource for the cell group with the same PN, then the base station keeps the cluster calling; and the base station system judges whether the sectors related to all the users corresponding to the cluster calling intensively are centralized in the same PN cell, and the base station system does not construct channel resource for the cell with the same PN, and then the base station system constructs channel resource for the cell group of the same PN and keeps the cluster calling. The invention also discloses a realizing system for the cell group with the same PN. Because the same PN cell technology is used for the CDMA, the system switching frequency of the CDMA cluster service is reduced and the call drop is avoided.
Description
technical field [0001] The present invention relates to the field of CDMA trunking systems, in particular to a method and system for realizing the same PN (Pseudorandom Noise, pseudorandom noise) cell group of CDMA2000 (CodeDivision Multiple Access, CDMA trunking system) 1x. Background technique [0002] In the CDMA2000 1x wireless cellular system, adjacent cells are distinguished by transmitting PN short codes with different offsets on the forward pilot channel. When the terminal passes through the coverage of different cells, it will switch due to the change of signal strength. In some special application scenarios, such as when the radius of the cell is small and the terminal moves quickly, the terminal in the call may switch frequently , and the increase in the number of handoffs, especially at high speeds, is prone to call drop. From the perspective of macro statistics, the call drop rate of the base station will increase and the stability of the system will decrease. ...
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IPC IPC(8): H04W4/06H04W76/02H04W84/08
Inventor 曹金波
Owner HUAWEI TEHCHNOLOGIES CO LTD