A method and device for realizing drx function

Abstract

The invention relates to the field of communication and discloses a method and a device for realizing a discontinuous reception (DRX) function, which are used for lowering operation cost of a system on the premise of not increasing equipment cost and not influencing cell capacity. The method comprises the following steps of: establishing DRX related timers for user equipment (UE) by using a base station when the UE accesses the system; and judging whether to schedule the UE or not only according to the states of the DRX related timers of the current UE to be scheduled in the current subframe before scheduling, instead of determining the states of the DRX related timers of all the UE. Therefore, by the method and the device, the operation cost of a network side can be effectively saved, resource waste of the system is avoided, the equipment cost of the network side cannot be increased, and the user capacity of cells cannot be influenced.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a method and device for realizing DRX functions. Background technique [0002] According to the LTE (Long Term Evolution) protocol, the DRX (discontinuous reception) function can be configured for the UE in the "RRC_CONNECTED" (radio resource control protocol connection) state. After the DRX function is enabled, the UE can discontinuously monitor the PDCCH (physical downlink sharing) control channel). A DRX cycle consists of two states: "working state" - during which UE monitors PDCCH; "DRX state" - during which UE can skip PDCCH data reception to save power. [0003] In order to realize the transition between the two states in the DRX cycle, the network side configures several timers for the DRX function of each UE at the RRC layer, which are called DRX-related timers. Taking a UE as an example, the DRX-related timers mainly include: [0004] DRX Inactivity Timer: the DR...

AI Technical Summary

Problems solved by technology

Therefore, in each subframe, the network side does not necessarily need to determine the DRX flags of all UEs, but only needs to obtain the DRX flags of UEs that are scheduled. From this perspective, the network side in each subframe is All UEs in the system update the corresponding DRX-related timers, which is a waste of system time-frequency resources

[0011] For example, suppose there are 1000 UEs in the cell, and each UE needs to configure 1 DRX Inactivity Timer, 1 On Duration Timer, 8 DRX Retransmission Timers and 8 HARQ Rtt Timers: then at least 1000*(1+ 1+8+8)=18000 DRX-related timers, and the precision of each DRX-related timer is very high (with a granularity of 1ms), then, in each subframe, the network side is related to these 18000 DRX The timer updates the state, which will bring huge resource overhead to the processor on the network side, thereby affecting the capacity of the cell. Specifically: if the capacity of the cell is to be maintained, a processor with higher performance is required, or more Two processors work in parallel, which will greatly increase the equipment cost on the network side. If the hardware environment remains unchanged, it is necessary to reduce the number of UEs in the cell and reduce the system capacity.

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