Quick switching method for physical layer of mobile communication system
A mobile communication system, fast handover technology, applied in wireless communication, electrical components, radio/inductive link selection and arrangement, etc., can solve the problem of increasing handover process delay and network signaling load, mobile terminals cannot obtain diversity gain with multiple antennas etc. to achieve the effects of reducing system signaling load, improving throughput, and reducing transmission power
Inactive Publication Date: 2005-07-06
SOUTHEAST UNIV
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[0006] In a traditional cell, the handover of a mobile terminal first requires the current serving base transceiver station (BTS) to send handover control signaling to the base station controller (BSC), and the base station controller (BSC) then sends a handover control signaling to the target base transceiver station (BTS). Control signaling, thus increasing the delay and network signaling load of the entire handover process
In traditional sectorized cells, inter-sector softer handover occurs when the terminal moves to the edge of an adjacent sector in the cell. Although the softer handover process can be implemented at the physical layer, the mobile terminal cannot pass multiple Antennas get diversity gain
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[0020] In a distributed cellular mobile communication system, when a mobile terminal is inside a generalized cell, the physical layer fast handover (L1 Handover) algorithm is used to assign a radio frequency antenna to the mobile terminal to maintain communication with the terminal. Since there is no signaling exchange between the mobile terminal and the system network, the handover delay is reduced. On the one hand, the fast switching execution process effectively reduces the average transmission power of the antennas in the cell and reduces the interference in the system; on the other hand, the selective multi-antenna transmission technology based on fast switching can The processing technology obtains higher diversity gain while effectively resisting channel fading.
[0021] The physical layer fast switching method of the mobile communication system of the present invention lies in that in the distributed cellular mobile communication system, when the mobile terminal moves ...
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A physical layer quick switching method for mobile communication system belonging to wireless resource management technology of wireless cellular mobile communication system, when mobile terminal moves in generalized community, the transmitter / receiver of base station directly realizes physical layer quick switching process according to mobile terminal signal strength received by every antenna, the basic rule of quick switching in physical layer is that making mobile terminal always communicating with the antenna having better channel condition according to different antenna covering range in generalized community, whole process from judging to switching is completed in physical layer, the physical layer quick switching contains A, transmitter / receiver of base station periodically measuring mobile terminal signal received by every RF antenna in generalized community, B, transmitter / receiver of base station updating RF antenna list of mobile terminal according to measured result of every mobile terminal, C, transmitter / receiver of base station selecting corresponded RF antenna and mobile terminal to communicate according to the RF antenna list of different mobile terminal.
Description
technical field [0001] The invention is a physical layer fast handover technology applicable to a distributed cellular mobile communication system, and belongs to the technical field of wireless resource management in a wireless cellular mobile communication system. Background technique [0002] Handover technology is one of the key technologies in cellular mobile communication systems. Effective handover algorithms can maintain link quality, suppress interference, and improve system capacity and quality of service (QoS) of cellular systems. According to whether the existing call connection is interrupted during the handover, the handover technology can be divided into a hard handoff (Hard Handoff) technology and a soft handoff (Soft Handoff) technology. Hard handover refers to disconnecting an existing ongoing call before a new call is established. Time Division Multiple Access / Frequency Division Multiple Access (TDMA / FDMA) uses hard handover tec...
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IPC IPC(8): H04W36/18H04W36/30
Inventor 尤肖虎赵新胜
Owner SOUTHEAST UNIV