Joint Scheduling and Channel Allocation Method for Reducing Transmission Delay of Downlink Shared Channel

Abstract

The invention discloses an integrated scheduling and channel distribution method for reducing transmission delay of a downlink shared channel of a TD-LTF / TD-LTF-A system. The integrated scheduling and channel distribution method comprises the following steps that (1), a base station divides users whose data need to be transmitted into a plurality of groups, and a terminal group classification table is created; (2), a base station device counts M sample(s) for each channel condition of the users, and calculates an average SINR in the period of M sample(s) for the users; (3), a base station scheduler calculates a dispatching priority of a mobile terminal; (4), according to data volume in a business buffer of the mobile terminal, the base station device determines the amount of resource blocks required by different terminals; (5), the amount of the resource blocks calculated by the terminal is sequentially distributed according to the order of the dispatching priority of the mobile terminal, if some resource blocks are left at last, the users with the longest delay can acquire the resource blocks to reduce the transmission delay of the system as far as possible. The integrated scheduling and channel distribution method makes good use of the channel condition and business state information to determine the dispatching priority and the channel resource is distributed to the users by adopting the Qos channel distribution method which can meet requirements of the users as far as possible.

Description

technical field [0001] The invention relates to a joint scheduling and channel allocation method for reducing the transmission time delay of a downlink shared channel of a TD-LTE / TD-LTE-A system, and belongs to the technical field of wireless resource management research in mobile communication systems. Background technique [0002] With the development of wireless communication technology, TD-LTE / TD-LTE-A, as the fourth generation mobile communication system, can support high-speed multi-user multimedia service transmission. These services usually have strict Qos requirements, such as: transmission delay, transmission data rate, and packet loss rate. Due to the time-varying nature of wireless channels and the limited spectrum resources, it becomes very difficult to meet the QoS requirements of multiple users. [0003] In recent years, OFDM technology is considered as the key radio interface transmission technology in LTE system. OFDM can resist multipath fading and interf...

AI Technical Summary

Problems solved by technology

[0004] Since data services in TD-LTE / TD-LTE-A systems are more sensitive to transmission delay requirements, traditional scheduling and channel allocation methods cannot meet their requirements. We need to propose effective packet scheduling and channel allocation techniques

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