Peer-to-Peer Wireless Timing Structure for Range Segmentation
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Solution Overview
Problem
Peer to peer wireless networks lack effective methods to support reliable communications over different ranges, leading to interference issues where short-range receivers are desensitized or saturated by concurrent long-range signals, preventing successful data recovery.
Innovation Solution
Implementing a peer to peer timing structure with non-overlapping time intervals for short and long-range communications, using different resource blocks with distinct characteristics such as tone width and symbol time intervals, and employing decentralized interference management for peer to peer traffic channel signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If concurrent long-range and short-range communications are supported using the same time resources, then communication versatility is improved, but receiver performance deteriorates due to saturation and de-sensing
Solution Approach 1:
The communication resources are segmented into separate time intervals for long-range and short-range communications. The peer-to-peer timing structure divides discovery resources and paging resources into distinct time blocks, preventing simultaneous transmission and reception that causes saturation and de-sensing.
Solution Approach 2:
The system employs periodic time intervals dedicated to different communication ranges. Long-range communications occur during specific time windows while short-range communications occur during other time windows, creating a periodic pattern that avoids interference while maintaining both communication capabilities.
2Reliability
If centralized power control is used to manage transmission power levels, then communication reliability is improved, but system complexity increases
Solution Approach 1:
The system uses decentralized power control where peer devices autonomously determine their transmission power levels based on the communication range requirements. Instead of requiring centralized base station control, each device independently adjusts its power, reducing system complexity while maintaining reliability through the timing structure that separates communication ranges.
3Device complexity
If peer to peer networks operate without centralized control, then system simplicity is improved, but interference management capability deteriorates
Solution Approach 1:
The peer-to-peer timing structure segments communication resources into distinct time intervals for different ranges and purposes. This segmentation provides structured interference management without requiring centralized control, as the time-division approach inherently prevents overlapping transmissions that cause interference.
Solution Approach 2:
The system changes the time parameter of resource allocation to manage interference. By assigning specific time intervals for long-range versus short-range communications, the system controls interference through temporal parameter changes rather than spatial or power-based control mechanisms.
Data Source
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AI summary
Methods and apparatus well suited for supporting communications over different ranges in, for example, a peer to peer wireless communications system, are described. In the peer to peer network at least some of the types of signals, e.g., peer discovery signals and/or paging signals, are transmitted with no closed loop power control. An exemplary peer to peer timing structure includes air link resources allocated for a particular type of signaling in which the resources are segmented into multiple blocks which do not overlap in time, different ones of the multiple blocks being associated with different ranges. The characteristics of the basic transmission units of the multiple blocks based on range are different, e.g., tone size and symbol width are different. A wireless communications device implements the peer to peer timing structure and uses resources from different range based blocks at different times. Data traffic transmission units may be the same regardless of the range.