Random access processing method, base station, terminal and system

Abstract

The invention discloses a random access processing method, a base station, a terminal and a system. The processing method comprises the following steps: receiving a leading sequence sent by the terminal, and distinguishing the leading sequence which is sent by a M2M terminal from the leading sequence; calculating the total power of the leading sequence which is sent by the M2M terminal and received in a preset time; judging whether the overload occurs according to the total power, if yes, sending a first random access respond message to the M2M terminal, such that the M2M terminal retreats in a retreat window according to a retreat indication in the first random access respond message, and resends the leading sequence with an identical power; if no, sending a second random access respond message to the M2M terminal, such that the M2M terminal performs the subsequent random access process according to the second random access respond message. The processing method breaks up a huge amount of M2M terminals which have sudden and random access, reduces the collision probability of the M2M terminal during the subsequent access, and improves the success ratio of the random access.

Description

technical field [0001] The present invention relates to the communication field, in particular to a random access processing method, base station, terminal and system. Background technique [0002] M2M (Machine to Machine Communication, machine-to-machine communication mode) may represent direct communication between terminals in a cellular network. M2M is different from H2H (Human to Human Communication, human-to-human communication method). M2M is based on terminals in specific industries, and uses SMS (Short Message Service, short message service) / USSD (Unstructured Supplementary Service Data, unstructured supplementary service data) / GPRS (General Packet Radio Service, General Packet Radio Service) etc. as access means, provide group customers with machine-to-machine solutions to meet customers' requirements for production process monitoring, command and dispatch, remote data collection and measurement, remote diagnosis, intelligent Informatization needs in transportati...

AI Technical Summary

Problems solved by technology

[0011] For the situation where a large number of terminals collide and cause conflicts, conflict resolution often fails. At this time, the reason for conflict resolution failure is not caused by the low power of the transmitted preamble sequence, but by too many terminals connected at the same time. It is specified in the standard that the terminal will still climb the slope at this time, and perform random access again with a higher power, so that there are still a large number of users performing random access at the same time point, and the access will still fail, and it will also cause the terminal to send The power is getting higher and higher, so this kind of blind climbing can only cause a waste of power, and cannot significantly improve the probability of random access success

Images