Random access method based on resource pattern

Abstract

The invention discloses a resource pattern-based random access method. By adopting the method, the following effects can be achieved: signals sent by a user continuously or discontinuously occupy a physical layer channel resource according to a resource pattern; in combination with a preferred coded modulation mode in a working mode, after the signals sent by the user are partially collided at a receiving end, the probability that messages are unrecoverable (which means the interruption probability) can be significantly reduced; in combination with a preferred resource pattern in the working mode, the proportion of the part of the signals sent by the user that have collisions at the receiving end can be effectively controlled; and in combination with the working mode and the resource pattern, the system load and the success probability of single transmission performed by the user can be optimized, the working mode for processing the transmitted messages can satisfy various system loadand transmission requirements, and compared with a traditional random multiple access scheme, the success rate of the single transmission performed by the user can be significantly improved.

Description

technical field [0001] The invention relates to the technical field of multiple access for digital information transmission, in particular to a random access method based on resource patterns. Background technique [0002] In a typical mobile communication system, a base station needs to communicate with multiple users within the coverage area, and the channel model for uplink multi-user transmission is an uplink multiple access channel (multiple access channel for short). Traditional uplink multi-user communication process with the base station adopts the mode of combining contention channel, signaling channel and data channel. Each user first uses the contention channel to establish a connection with the base station through the contention access method according to the agreement, so as to obtain the signaling channel and data channel resources (including signaling resources and pilot resources) required by the user to send information, and then use the corresponding Sign...

AI Technical Summary

Problems solved by technology

And when the user fails a single transmission, the behavior of the user retransmitting will also cause problems such as network congestion and excessive user delay.

Therefore, random access technologies such as traditional ALOHA are difficult to apply to scenarios where the user power is limited or the message to be transmitted has strong timeliness, which requires a high probability of success for a single user transmission.

[0011] Third, traditional ALOHA and other random access technologies require users to send signals to occupy the same amount of small resources, which leads to the physical layer having to face a random number of sent signals, which is very important for building channel models, calculating channel capacity, and designing coding and modulation approaches to capacity. The model presents a great challenge

Therefore, random access technologies such as traditional ALOHA are sensitive to system load, and it is difficult to perform adaptive processing according to system load.

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