Method, device and system for semi persisting scheduling of VoLET(Voice Over Long Term Evolution)services

Abstract

The invention provides a method, a device and a system for semi persisting scheduling of VoLET (Voice Over Long Term Evolution) services. The method includes the following steps that: a semi persisting scheduling device receives a semi persisting scheduling request sent by a user equipment i and then calculates the priority P(i)=Pri(i)*lg(PrbN(i)*overline(COI)(i)+6) / lgRave(i) of the user equipment i, wherein Pri(i) represents the preset priority of the user equipment i, PrbN(i)represents the demanded quantity of a PRB (physical resource block), overline(CQI)(i) represents the average channel quality of the user equipment i, Rave(i) represents the average transmission rate demanded by the user equipment i; and the semi persisting scheduling device sequentially conducts semi persisting scheduling to a plurality of user equipment according to the priorities of the user equipment. Through the method, the device and the system, the utilization ratio of the wireless resource of the VoLTE services is improved, and the user volume and the user satisfaction of the voice services are improved.

Description

technical field [0001] The invention relates to a semi-persistent scheduling method, device and system for VoLTE services, and belongs to the technical field of voice communication. Background technique [0002] The VoLTE service refers to an LTE-based voice (Voice over LTE) service. Among them, the biggest change of the LTE (Long Term Evolution, Long Term Evolution) technology compared with the previous wireless technology lies in the use of the concept of a shared channel. Except for a specific small part of resources used to transmit broadcast messages and uplink and downlink channel control information, other resources are shared by all users and uniformly scheduled. Since wireless resources are shared, the MAC (Media Access Control, Media Access Control) layer of LTE becomes more important in scheduling resources. It not only needs to consider business priorities, but also ensures that most users The benefits; not only to ensure the timely transmission of signaling, b...

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Problems solved by technology

[0007] The problem with the existing technology is that for VoLTE services, although semi-persistent scheduling can greatly reduce signaling overhead compared with dynamic scheduling, in the existing semi-persistent scheduling scheme, requests from user equipment are all first-come-first-served. User equipment with poor channel quality and user equipment with good channel quality have the same priority to use resources, so that invalid data and retransmission data of user equipment with poor channel quality will occupy a lot of resources, and their scheduling is also difficult. It will cause other user equipment to wait for scheduling timeout, thus affecting the utilization of wireless resources

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