Peer-to-Peer Wireless Terminal Uplink Downlink Resource Sharing
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Solution Overview
Problem
Wide area network (WAN) communications systems face interference from peer to peer signaling when sharing downlink and uplink air link resources, affecting the reception and recovery of signaling by WAN wireless terminals and base stations.
Innovation Solution
A peer to peer wireless terminal uses both WAN uplink and downlink communications air link resources for signaling, implementing different transmission power control functions depending on the mode of operation, allowing it to switch between uplink and downlink share modes based on power control information and resource needs in time or frequency division duplex systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If peer to peer signaling uses WAN air link resources, then communication efficiency is improved, but interference with WAN signaling reception is increased
Solution Approach 1:
The patent segments the air link resources into dedicated peer-to-peer channels and shared WAN channels, allowing peer-to-peer signaling to use resources without interfering with critical WAN signaling. The base station creates separate reception channels for peer-to-peer signals and WAN signals, enabling simultaneous operation without mutual interference.
Solution Approach 2:
The base station acts as an intermediary that receives both peer-to-peer signals and WAN signals, then selectively forwards appropriate signals to the wireless terminal. This intermediary function allows the system to distinguish between peer-to-peer communication and WAN signaling, preventing interference while maintaining both communication types.
2Reliability
If peer to peer device transmits at high power level, then peer to peer communication reliability is improved, but impact on base station signaling recovery is increased
Solution Approach 1:
The patent applies different power control functions based on the specific transmission context. The base station determines appropriate power levels for peer-to-peer transmissions based on local conditions such as distance to wireless terminal, current traffic conditions, and interference levels, rather than using a uniform high power level always.
Solution Approach 2:
The system implements feedback mechanisms where the base station monitors the impact of peer-to-peer transmissions on WAN signaling recovery and adjusts power levels accordingly. This feedback loop allows the system to maintain peer-to-peer communication reliability while preventing excessive interference with base station signaling recovery operations.
3Productivity
If WAN air link resources are shared with peer to peer signaling, then resource utilization is improved, but signaling recovery accuracy is worsened
Solution Approach 1:
The patent segments the signal reception process into separate channels for peer-to-peer signals and WAN signals. The base station receives both types of signals but processes them through different reception paths, ensuring that peer-to-peer signaling does not interfere with the accuracy of WAN signaling recovery while still allowing both to share the air link resources.
Data Source
AI summary
Methods and apparatus for supporting peer to peer communications are described. A peer to peer communications device uses both wide area network (WAN) uplink and downlink communications air link resources for peer to peer signaling. During an uplink share mode of operation a peer to peer wireless terminal uses a wide area network uplink communications band to communicate peer to peer signals, and the peer to peer wireless terminal implements a first transmission power control function. During a downlink share mode of operation, the peer to peer wireless terminal uses a wide area network downlink communications band to communicate peer to peer signals, and the peer to peer wireless terminal implements a second transmission power control function. The second power control function is different from the first power control function.