Method for dispatching cluster multimedia service downlink wireless resource under TD-LTE (time division-long time evolution) public network

Abstract

The invention relates to a method for dispatching a cluster multimedia service downlink wireless resource under a TD-LTE (time division-long time evolution) public network, which relates to a downlink wireless resource dispatching method, and aims at solving the problem that the user in low priority cannot acquire the resource for a long time, can improve the fairness among different users, also can satisfy the transmission characteristics of the cluster multimedia service, i.e. the QoS (quality of service) characteristic of the multimedia service for satisfying the user in high priority. Since the real-time service has the time-delay sensitive characteristic, the bearable maximal time delay needs to be defined in the QoS characteristic of each real-time service, when one real-time service cannot be dispatched for a long time, the waiting time of a data packet exceeds the bearable maximal time delay, and the data packet of the data stream is considered as packet loss. Due to the QoS characteristic satisfying the real-time business in priority, the real-time service flow is selected; if the to-be-dispatched real-time service flow exists, an IP / PF algorithm is used for dispatching the selected real-time service flow. By adopting the method, on the premise of satisfying the transmission cluster multimedia business characteristics of the LTE public network, the problem that the user in low priority cannot acquire the resource for a long time can be solved, and the fairness among different users can be improved.

Description

technical field [0001] The invention relates to a downlink wireless resource scheduling method. Background technique [0002] DTLC theory: DTLC (Discrete-Time Line Control) theory, such as figure 2 As shown, let t k,i is the start time of the kth frame of the i-th real-time service flow, so there is a sampling interval △t(k)=t k+1,i -t k,i Equal to the duration of an LTE frame. It can be obtained from the block diagram: q i (k+1)-q i (k)=d i (k)-u i (k). Among them, q i (k) is the ith queue at t k,i the length of the moment, u i (k) is the amount of data to be transmitted in the kth frame time, d i (k) represents the amount of data newly filled into the queue in the kth frame time. We assume the following general control law: [0003] u i (k)=h i (k)*q i (k), where the "*" operation is a discrete-time convolution. h i (z) for h i (k) Z transformation, namely H i (z)=Z[h i (k)]. use h si (k) represents the impulse response of the system, so there is q ...

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Problems solved by technology

[0015] The purpose of the present invention is to provide a TD-LTE public network cluster multimedia service downlink radio resource scheduling method to solve the problem that low priority users may not be able to obtain resources for a long time, to achieve improved fairness between users; The transmission characteristics of multimedia services, that is, the QoS characteristics of multimedia services for high-priority users

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