Prioritized random access method, resource allocation method and collision resolution method

Abstract

A prioritized random access method, a resource allocation method, and a collision resolution method are proposed for wireless communication devices with different priority levels pre-assigned according to their respective service requirements. In the prioritized random access method, different priorities are assigned to connection requirements of wireless communication devices according to their respective service characteristics. Collision resolution mechanisms of the prioritized random access method enable establishing connections of different service requirements such as time strict, delay tolerant, and normal user service. The resource allocation method allows different types of contention accesses have different collision opportunities and connection setup delays, and also enables dynamical adjustment in resource allocation according to practical application requirements, the number of MTC devices and system loading. Thus, resource utilization rate of the overall wireless communication network is enhanced.

Description

technical field [0001] The present disclosure relates to a priority random access method, a resource allocation method and a collision resolution method applied to wireless communication devices pre-assigned with different priority levels according to different service requirements. Background technique [0002] Machine-type-communication (MTC) or machine-to-machine (M2M) communication is a unique communication technology that can realize the "Internet of things (IOT)". MTC is defined as an information exchange between a user device (or a wireless communication device) and a server via a wireless communication network, or between user devices without human-computer interaction. Many industry reports point out that the market potential of MTC is huge. Due to the huge market potential of MTC, several wireless communication systems such as 3GPP Long Term Evolution (3GPP LTE) and IEEE 802.16 have begun to develop communication protocols that can apply MTC and are backward compa...

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Problems solved by technology

[0004] In addition, when a large number of MTC devices require to establish connection with the same base station at the same time, this situation may cause a huge load on the base station

On the other hand, in a shared wireless medium, MTC devices with the above-mentioned form of connection establishment requests are more likely to cause collisions, and after each collision, MTC devices must perform random backoff processes for the next connection transmission request respectively. )

When the collision is serious, the connection establishment may fail due to exceeding the preset limit of connection establishment

For example, when an MTC device is requested to send an emergency message (which should be considered as the highest priority) via the base station, the emergency message may time out due to the aforementioned collision and subsequent connection establishment failure.

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