OFDM Peer Discovery Signal Segmentation in WWAN Silence Intervals
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Solution Overview
Problem
Current WWAN systems lack effective methods for enabling peer-to-peer communication between wireless devices in close proximity, which could reduce traffic load on base stations and enable new services, due to the absence of efficient peer discovery mechanisms.
Innovation Solution
The method involves receiving and transmitting OFDM peer discovery signals within WWAN resources, specifically utilizing a silence interval with dedicated subsets of resources where the base station measures noise in one subset while allowing wireless devices to use another subset for peer discovery, thereby facilitating direct communication between devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If peer discovery signals are transmitted using existing WWAN resources, then peer-to-peer communication can be enabled, but noise measurement accuracy deteriorates due to interference from discovery signals
Solution Approach 1:
The silence interval resources are segmented into two subsets: a first subset reserved for base station noise measurement and a second subset for peer discovery signal transmission. This segmentation allows simultaneous noise measurement and peer discovery without mutual interference, resolving the contradiction between enabling peer-to-peer communication and maintaining noise measurement accuracy
Solution Approach 2:
Different quality requirements are applied to different resource subsets within the silence interval. The first subset is optimized for noise measurement with strict interference constraints, while the second subset is optimized for peer discovery signal transmission. This local differentiation allows each function to operate with appropriate quality levels without compromising the other
2Productivity
If all WWAN resources are used for peer discovery, then discovery efficiency is improved, but noise measurement capability is lost
Solution Approach 1:
The silence interval is divided into two functional subsets: resources for noise measurement and resources for peer discovery. This segmentation ensures that peer discovery can utilize available resources efficiently while preserving dedicated resources for noise measurement, thus maintaining both discovery productivity and measurement reliability
Solution Approach 2:
The silence interval resources serve dual purposes: they enable peer discovery communication while simultaneously preserving the base station's ability to perform noise measurements. This multi-functionality allows the same resource pool to support multiple critical functions without requiring separate dedicated resources for each
Data Source
AI summary
A method of wireless communication of a wireless device includes receiving a signal indicating WWAN resources that can be utilized for communicating peer discovery signals. In addition, the method includes communicating an OFDM peer discovery signal in the WWAN resources. A method of wireless communication of a base station includes transmitting a signal to a wireless device indicating WWAN resources dedicated for a silence interval that can be utilized for communicating peer discovery signals. The WWAN resources dedicated for a silence interval include a first subset of resources and a second subset of resources. The method further includes measuring noise in the first subset of resources and refraining from measuring noise in the second subset of resources.