Method and device for controlling quality of service

Abstract

The invention discloses a method for controlling the quality of service, which is applied to a base station and comprises the steps of receiving information, which is sent by a core network control network element, of a bearer identifier of a core network to which a packet data network (PND) is connected and a corresponding quality of service (QoS) parameter, and building a mapping relation between the core network load identifier and the corresponding QoS parameter; after a wireless bearer capable of meeting QoS parameter requirements is determine to exist between a user terminal and the base station according to the received QoS parameter information connected with the PDN, utilizing the existing wireless bearer meeting the QoS parameter requirements, building a mapping relation between the existing wireless bearer and the bearer identifier of the core network to which the PDN is connected, and sending information of the mapping relation to the user terminal. According to the invention, a wireless bearer is shared in a mode of crossing connection of the packet data network, and he base station can autonomously decide whether to establish a wireless bearer or not, so that the accuracy of quality-of-service control is improved, and air interface resources are saved.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a method and device for controlling service quality. Background technique [0002] In the 4G (Four Generation, fourth-generation mobile communication technology) mobile communication system, the data streams with the same QoS (Quality of Service, Quality of Service) requirements are aggregated into bearers, and the user plane network elements such as base stations and gateways process QoS All take bearer as the minimum granularity. Among them, such as figure 1 As shown, the functions of the main network elements involved in the 4G system QoS solution are as follows: [0003] The terminal (User Equipment, UE) mainly accesses the 4G network through the wireless air interface and obtains services. The terminal exchanges information with the base station through the air interface, and through non-access stratum signaling (Non-Access-Stratum, NAS) and core netwo...

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Problems solved by technology

[0014] 1) When the original bearer cannot meet the service requirements, the policy control entity (Policy and Charging Rules Function) behind the PGW on the network side makes the final decision whether to modify the QoS parameters of the original bearer or create a new one Bearer, and determine the QoS parameters of the bearer, the base station can only accept or reject the QoS parameters requested by PCRF, and cannot adjust QoS according to the actual wireless load, and PCRF actually cannot know the current actual wireless load, so it is difficult to make a reasonable QoS decision

[0015] 2) The wireless bearer on the air interface and the core network bearer are mapped 1:1. The PCRF ensures that there will not be two bearers with the same QoS requirements in one PDN link. However, when the user requests a second PDN link, different PCRFs may decide Establish a bearer with the same QoS requirements as the first PDN link. At this time, there will be two wireless bearers with the same QoS for one user, resulting in waste of resources.

[0016] 3) The bearer is the aggregation of streams. The radio bearer and the network bearer have a 1:1 mapping relationship. If the network side needs flow-based QoS control, different streams require different bearers, which will cause too much data to be carried by the base station.

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