P2P Resource Assignment via Signal Strength Measurement
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Solution Overview
Problem
In cellular P2P communication systems, interference occurs between P2P links using the same resources, disrupting seamless communication.
Innovation Solution
A method and apparatus where a mobile station measures the signal strength of adjacent P2P links' amble signals and reports the results to a base station, allowing the base station to assign P2P resources that minimize interference by separating resource usage in the frequency or time domain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple P2P links use the same resources in one cell, then resource utilization efficiency is improved, but interference occurs between adjacent P2P links
Solution Approach 1:
The patent applies local quality by allowing different P2P links to use different resources (time slots, frequency bands, or codes) based on their specific locations and interference conditions. The base station assigns resources individually to each P2P link considering the local interference environment, thus maintaining high resource utilization while preventing interference between adjacent links.
Solution Approach 2:
The patent implements dynamic resource allocation where the base station continuously monitors interference conditions and adjusts resource assignment for P2P links in real-time. This dynamic approach allows the system to adapt to changing interference conditions, maintaining optimal resource utilization efficiency while preventing interference as links are established, modified, or terminated.
2Loss of time
If P2P communication is established without BS relay, then transmission latency is reduced, but resource management complexity increases
Solution Approach 1:
The patent uses the base station as an intermediary for resource management while allowing direct P2P communication. The base station handles the complex resource allocation, coordination, and interference management tasks, freeing the P2P links from resource management complexity while maintaining low transmission latency through direct communication paths.
3Measurement precision
If P2P amble signal measurement is performed on adjacent links, then interference detection capability is improved, but measurement and reporting overhead increases
Solution Approach 1:
The patent implements partial measurement by having mobile stations measure P2P amble signals only on selected adjacent links rather than all possible links. This selective measurement approach provides sufficient interference detection capability to enable effective resource allocation while reducing the measurement and reporting overhead compared to comprehensive measurement of all adjacent links.
Data Source
AI summary
A method and apparatus for managing resources for Peer-to-Peer (P2P) communication in a wireless communication system. A mobile station (MS) attempting to establish P2P communication receives a P2P amble signal transmitted on at least one adjacent P2P link, measures a signal strength for the P2P amble signal, reports the measurement results to a base station (BS), and performs the P2P communication using a P2P resource that is assigned by the BS according to the measurement results. The BS assigns a resource different from the resource assigned to a P2P link having a highest signal strength measured, as a resource for the P2P communication, thereby preventing possible interference caused by adjacent P2P links.