Carrier aggregation based method for separating control plane from user plane

Abstract

The invention relates to a carrier aggregation based method for separating a control plane from a user plane. Base stations include a macro base station and micro base stations which are used for establishing a communication connection with user equipment. The method comprises the steps that the macro base station and the micro base stations are respectively set as a primary serving cell (Pcell) and secondary serving cells (Scells); a control signal uses the scheduling grant of the macro base station and is sent prior to a first MAC CE signal; in the previous step, if the scheduling grant of the macro base station is sufficient to support the transmission of the first MAC CE signal besides the part used by the control signal, the macro base station sends the first MAC CE signal, otherwise, the macro base station sends the first MAC CE signal to the micro base station; and the first MAC CE control signal uses the scheduling grant and is sent prior to data. According to the method, optimal allocation of the scheduling grant of the macro base station is realized while high-level mobility management is guaranteed.

Description

technical field [0001] The present invention relates to the field of wireless communication, and more specifically, relates to a method for realizing separation of control plane and user plane based on carrier aggregation in a base station and user equipment of a wireless communication network. Background technique [0002] In today's heterogeneous wireless communication network, there are generally macro base stations with a larger coverage area and micro base stations with a relatively smaller coverage area. figure 1 A schematic diagram 100 of a network architecture in the prior art is shown. It can be seen from the figure that in such a network environment, the macro base station 110 provides the most basic network coverage (the part shown in the dotted background in the figure), and at the same time , such as micro base stations 121, 122, 123, and 124 with smaller power (ie, smaller network coverage (areas marked with backslashes in the figure)) provide higher-speed netw...

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Problems solved by technology

In this way, on the one hand, RRC signaling may not fully utilize the scheduling resources on the macro base station, that is, there may be some remaining scheduling resources on the macro base station that can be used by other signaling, but due to the traditional Only RRC signaling is propagated on the macro base station, so that this part of the remaining scheduling resources will be wasted; on the other hand, an important type of "control signaling", that is, MAC CE signaling, is also eager to be able to pass the scheduling of the macro base station resources, and transmission on the scheduling resources of the micro base station will cause the transmission delay brought by the X2 interface, which is unfavorable for the communication of the wireless network and the optimization of subsequent scheduling

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