Method used for guaranteeing CCE (Communication Control Equipment) distribution fairness in LTE (Long Term Evolution) system

Abstract

The invention relates to a method used for guaranteeing CCE (Communication Control Equipment) distribution fairness in an LTE (Long Term Evolution) system in the field of mobile communication, which comprises the following steps: 1) resetting counters for the number of users distributed with CCE in downlink and uplink before each TTI (Transmission Time Interval) scheduling starts, and simultaneously acquiring uplink and downlink channel quality of users expected to be scheduled; 2) calculating the maximum number of users capable of being distributed with the CCE in the uplink and downlink scheduling in the TTI; 3) respectively setting the counters for the number of users successfully distributed with the CCE in the uplink and downlink scheduling, distributing CCE resources in the CCE resource distribution process only when the counters are smaller than the maximum number of users capable of being distributed with the CCE, and otherwise returning to application failure; and 4) adding 1 to the corresponding counter if the CCE is successfully distributed to the users. The method disclosed by the invention ensures that the ratio of the number of users successfully distributed with the CCE in the uplink scheduling in the LTE system to the number of users successfully distributed with the CCE in the downlink scheduling in the LTE system is in balance related to the uplink and downlink channel quality.

Description

technical field [0001] The invention relates to a method for ensuring the fairness of CCE (Control Channel Element, control channel element) allocation in the LTE (Long Term Evolution, long term evolution system) system in the field of mobile communication. Background technique [0002] In the LTE system, CCE (Control Channel Element) is a resource that carries DCI (Downlink Control Information). DCI format 0 is used to indicate the scheduling result of PUSCH (Physical Uplink Share Channel) in uplink scheduling, and DCI formats 1 to 2A are used for Indicates the scheduling result of PDSCH (Physical Downlink Share Channel) in downlink scheduling. Therefore, the CCE resource becomes a shared resource in the uplink and downlink scheduling, and part of the information indicates the result of the uplink scheduling, and part of the information indicates the result of the downlink scheduling. [0003] From this, it can be known that there must be a problem of preemptive use of thi...

AI Technical Summary

Problems solved by technology

That is, both uplink scheduling and downlink scheduling require the use of CCE resources, but CCE resources are very limited. Once the scheduling side runs fast and there are many users applying for CCE, it will exhaust the CCE resources, resulting in scheduling failures. When the other party fails to apply for CCE resources or only a few users can apply successfully, this will lead to unfair use of CCE resources in uplink and downlink scheduling.

At the same time, during resource allocation in scheduling, the premise of allocating RB (Resource Block) is that there is a corresponding DCI information indication, which tells the user the location information of RB, so once the user fails to apply for CCE resources, he cannot apply RB, if one party in the scheduling can use too few CCE resources, it will inevitably lead to the waste of corresponding RB resources, so it is very necessary to ensure the fair use of CCE by uplink and downlink scheduling

Images