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Switching method between frequencies

An inter-frequency and gap technology, applied in the field of inter-frequency handover, can solve the problems of poor data transmission link performance, loss of power control bit information, and link quality degradation, so as to improve resource utilization and prevent link signal quality. The effect of reducing and shortening the transmission interval

Inactive Publication Date: 2005-01-12
HUAWEI TECH CO LTD
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Problems solved by technology

Due to the large gap generated by the compressed mode, more power control bit information may be lost, resulting in poor performance of the data transmission link. In the process of inter-frequency handover, the signal quality itself has deteriorated, and precise power control is required. control to prevent link quality degradation, so existing inter-frequency handover methods are not conducive to preventing link quality degradation

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Embodiment Construction

[0018] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0019] DPCCH gating technology is suitable for uplink and downlink data transmission links. When there is no data to send, stop sending DPCCH, and when there is data to send, resume sending of DPCCH and DPDCH (dedicated physical control channel and dedicated physical data channel). Since the gating technology adopts the above scheme, compared with the compressed mode, the gating gap generated in a data frame is not continuous, making the gating gap smaller. If the gating technology is used for switching between frequencies, the TPC will be lost. Less information. The essence of the present invention is that the UE performs inter-frequency cell synchronization and measurement through the gap generated by the DPCCH gating technology. It can provide physical frame gaps while maintaining the continuity of power control and improving the performance of inter-frequency...

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Abstract

A method of switching between frequencies includes the follows: Using the Vser's equipment to detect signal quality of original small area, if detected quality of signal is lower than predefined threshold the measurnig result will be reported to network and the network will define to apply gating technique of special physical control channel for carrying on measurement between frequencies and also to dispose transmission format set, UE and DPCCH gate control parameter at base station side according to the reported rsult; UE and network side will carry on gate control according to the gate control parameter, UE will carry on also quality measurement of signal and synchronization for adjacent frequency small area by using gap created with DPCCH gate control technique and to report measuring result to network; the network will judge whether the switching between frequencies is ncessary or not according to measured result.

Description

Technical field [0001] The present invention relates to a method for switching user equipment (UE) in a mobile communication system between different base stations, especially an inter-frequency switching method. Background technique [0002] In a mobile communication system, when the UE moves from a local base station to a target base station, handovers between base stations are usually involved. Since the frequency used when the UE establishes a connection with the local base station or the target base station may be different, the essence of this handover is The above is switching between frequencies. The existing inter-frequency handover scheme is implemented in compressed mode. The specific method is: when the UE monitors that the signal quality of the original cell is lower than a predefined threshold, it reports the measurement result to the network, and the network according to the reported result, Configure the compressed mode parameters of the UE and the base station th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/30H04B7/26
Inventor 李志明
Owner HUAWEI TECH CO LTD