Wireless Device Group Coordinator for Random Access Resource Allocation
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Solution Overview
Problem
In cellular networks with a high number of Machine Type Communication (MTC) devices, the control channel resources are often congested due to each device needing to establish its own radio connection, leading to inefficiencies in Random Access Channel (RACH) access, especially when many devices attempt to access the network simultaneously.
Innovation Solution
Implementing a method where wireless devices are grouped, with one device acting as a coordinator for direct mode communication, allowing them to collectively request resources from the network node, reducing the intensity of random access attempts and enabling coordinated resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each device establishes its own radio connection for random access, then individual device connectivity is ensured, but control channel resources become congested when many devices access simultaneously
Solution Approach 1:
Multiple MTC devices are grouped together and share a common radio connection for random access. The group uses shared uplink resources to transmit random access requests to the network, reducing the number of individual control channel occupations while maintaining each device's connectivity to the network.
2Productivity
If devices are grouped for coordinated random access, then control channel congestion is reduced, but the complexity of group management and coordination increases
Solution Approach 1:
MTC devices automatically select themselves into groups based on their service requirements and transmit their group affiliation in their random access request. The network node automatically assigns group IDs and manages the grouping process, eliminating the need for manual group configuration and reducing signaling overhead.
3Productivity
If a coordinator device is assigned to represent a group, then the number of random access attempts is reduced, but the selection and management of coordinator devices adds complexity
Solution Approach 1:
The coordinator device is automatically selected from within the MTC group based on predetermined criteria such as device ID or signal quality. The coordinator's identity is derived from the group composition itself, eliminating the need for separate coordinator selection procedures and reducing management complexity.
4Productivity
If group size is increased to reduce random access intensity, then resource allocation efficiency improves, but the delay in resource assignment increases
Solution Approach 1:
The network node dynamically adjusts the group size and composition based on current network conditions, traffic patterns, and resource availability. Groups can be reconfigured in real-time to optimize the balance between reducing random access intensity and minimizing resource assignment delays, allowing the system to adapt to changing requirements.
Data Source
AI summary
A first wireless device, a second wireless device, a network node and respective methods performed thereby for performing random access are provided. The first wireless device, the second wireless device and the network node are operable in a wireless communication network. The method performed by the first wireless device comprises receiving (105) from the network node, a configuration that the first wireless device and one or more second wireless devices are part of a group, and that the first wireless device shall act as a coordinator for the group, wherein wireless devices in the group are capable of direct mode communication, D2D; and receiving (120) one or more resource requests from respective one or more second wireless devices in the group, wherein each one of the resource requests are received over a D2D link, between the first wireless device and the respective one or more second wireless devices. The method further comprises transmitting (160) a random access request to the network node, which random access request relates to requested resources according to the received one or more resource requests from the group.