Handover processing method and device for wireless self backhaul transmission
A processing method and self-backhaul technology, which is applied in the field of communication, can solve the problems of data packet loss, transmission delay, waste of wireless resources, etc., and achieve the effect of improving reliability, improving the utilization rate of air interface resources, and reducing the waste of wireless resources
Inactive Publication Date: 2011-01-05
HUAWEI TECH CO LTD
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[0007] Due to the characteristics of the self-backhaul itself, that is, radio resources are used between the self-backhaul base station / L3Relay and the eNB (eNodeB, base station), before the UE completes the handover and the MME (Mobility Management Entity, mobility management unit) updates the S-GW bearer , all downlink data will be sent to the self-backhaul base station / L3Relay along the tunnel before the handover, but since the self-backhaul base station / L3Relay has sent a handover command to the UE, the UE can no longer receive downlink data under it, and according to the standard Handover process. At this time, the data that has been sent to the self-backhaul base station / L3 Relay must be forwarded to the target base station eNB, and the self-backhaul base station / L3 Relay will also apply for backhaul air interface resources to forward the received data. The round trip between the backhaul base station / L3Relay and the target base station eNB wastes wireless resources
At the same time, due to the round trip of data flow, it may also cause the loss of data packets and transmission delay.
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[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
[0042] When the UE initiates a handover from the self-backhaul base station / L3Relay to any other base station, Figure 1-4 The downlink data flows in the four handover scenarios in the prior art are respectively shown, wherein, figure 1 Shows the data flow of the UE switching from the self-backhaul base station / L3Relay to the same eNB; figure 2 Shows the data flow of the UE switching from the self-backhaul base station / L3Relay to another eNB; image 3 Shows the data flow of handover between self-backhaul base stations / L3Relay under the same eNB; Figure 4 The data...
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The invention discloses a handover processing method for wireless self backhaul transmission. The method comprises the following steps of: caching a downlink packet by a main base station after receiving a handover request message sent by a self backhaul base station; sending the cached downlink packet to a terminal by the main base station through a target base station. Meanwhile, the invention discloses a base station and a communication system. According to the invention, the utilization ratio of air interface resources and the reliability of data transmission can be improved and the time delay of packet transmission can be reduced.
Description
technical field [0001] The present invention relates to the field of communication technology, in particular to a handover processing method and device for wireless self-backhaul transmission. Background technique [0002] The wireless self-backhaul transmission method uses the mobile terminal as the transmission bearer of the base station, that is, under the same wireless system, the transmission problem of some small base stations is solved through the cascading of two-level wireless access links. In the wireless self-backhaul networking architecture, the packet data from the Secondary BS (slave base station) is carried by the backhaul UE (User End, user terminal equipment) and the Primary BS (main base station), and then sent to the core network element, such as LTE (Long Term Evolution, long-term evolution) S-GW (Serving-Gateway, service gateway) or WiMAX (Worldwide Interoperability for Microwave Access, microwave access global interoperability) AGW (Access Gateway, acce...
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Login to View More IPC IPC(8): H04W36/02H04W88/08
CPCH04W36/02H04W36/08H04W36/023H04W88/08H04W28/04H04W36/0235
Inventor 林高全陈卫民刘晟
Owner HUAWEI TECH CO LTD