Method and apparatus for transmitting system information between nodes in the Channel Switch preparation process

Abstract

The invention provides a method for transmitting system information between nodes in the Channel Switch preparation process, which includes: setting storage state of the local target eNB, determiningwhether to transmit the switch request containing system information of the original channel based on the storage state of the target eNB, and monitoring the feedback response of the target eNB; after the target eNB receives the switch request, storing the original channel system information of the UE and returning response, if the original channel system information of the UE is contained in theswitched request message. The invention also provides an apparatus for transmitting system information between nodes in the Channel Switch preparation process. By adoption of the inventive method andapparatus, the transfer frequency of the system information between nodes is reduced, and the internal cost of the wired net is effectively controlled.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a method and device for transferring system information between nodes during cell handover preparation process. Background technique [0002] In a mobile communication system, in order to improve spectrum resource utilization and system capacity, the radio frequency power in the system must be limited within a certain range. When a UE (user terminal) leaves a cell and enters another cell, the received signal of the original cell will become weaker and weaker, while the received signal of the entering cell will become stronger. In order to ensure the communication quality of the mobile terminal, the mobile terminal must be handed over from the original eNB to a new eNB with a stronger signal, that is, handover from the original cell to the target cell. [0003] Before switching from the original cell to the target cell, the UE needs to know the system informa...

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Problems solved by technology

[0006] However, based on the above mechanism, if only the difference part of the system information is to be fed back, the target eNB must know the system information of the original cell for comparison; The INFORMATION message carries the system information of the original cell, and is transmitted to the target eNB by using the X2 port message HANDOVER REQUEST; the update frequency of the system information of the cell is much lower than the switching frequency of the UE between cells, which results in a system information update cycle within one system information update cycle. , the same original cell system information must be transmitted from the same original eNB to the same target eNB through the X2 interface multiple times during each UE handover preparation process, resulting in the overhead of repeatedly occupying the wired network and causing great waste

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