Dynamic configuration method for channel resources in random access of low earth orbit satellite network

Abstract

The invention provides a method for dynamically configuring channel resources in random access of a low earth orbit satellite network, which comprises the following steps that: a user service model and a network system model are constructed, and model parameters comprise an access demand, the length of an SSB broadcast period, a coverage area of satellites, the number of ROs (Reverse Orientation) and available resources of PO (Power Orientation); a deep reinforcement learning model is constructed, model parameters comprise the state, the action and the reward of the RO in one SSB broadcast period, the state comprises the coverage area of the satellite, the wave position of the RO and the like, and the action comprises the PO allocated for the RO according to the state; training a deep reinforcement learning model according to the training data to obtain a trained deep reinforcement learning model; acquiring the current state of each target RO of each low earth orbit satellite in the current SSB broadcast period, inputting the current state into the trained deep reinforcement learning model, and outputting a target action corresponding to the current state by the trained deep reinforcement learning model; and allocating a target PO resource for each target RO according to the target action.

Description

technical field [0001] The present invention mainly relates to the field of low-orbit satellite communications, and in particular, to a method, device and computer-readable medium for dynamically configuring channel resources in random access to a low-orbit satellite network. Background technique [0002] With the continuous development of terrestrial network technology, the fifth-generation cellular communication system has proposed the goal of seamless global coverage, and low-orbit satellites are rapidly integrated with 5G networks due to their wide coverage and low latency. Three-dimensional, multi-level, all-round and all-weather information network provides strong support. In order to enjoy the network service, the user terminal needs to complete the random access procedure before connecting to the network, realize synchronization with the network, and obtain the exclusive reference identifier of the network. [0003] A low-orbit satellite uses a small number of phase...

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Problems solved by technology

However, in the existing protocol, the base station first configures RO periodically, and then configures PO in the corresponding PUSCH resource group. The number of time slots occupied by each PUSCH resource group is fixed, so the RO in a PRACH group corresponds to When the simultaneous access demand of several wave positions is large or the access demand is small, it will cause a lot of conflicts or waste

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