P2P and WAN Communication Multiplexing via Subframe Segmentation
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Solution Overview
Problem
Existing wireless communication networks face challenges in efficiently supporting peer-to-peer (P2P) communication within wide area networks (WANs), particularly due to regulatory constraints and interference issues when trying to allocate P2P communication on both downlink and uplink spectra in FDD deployments.
Innovation Solution
The method involves designating specific subframes in the WAN uplink spectrum for P2P communication, allowing P2P mobile entities to use WAN physical layer channels for control information and data transmission, and employing time division multiplexing (TDM) or frequency division multiplexing (FDM) to concurrently support P2P and WAN communications, ensuring transmission gaps to avoid interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If P2P communication is allocated on both downlink and uplink spectra in FDD deployments, then P2P communication capability is improved, but regulatory constraints and interference issues worsen
Solution Approach 1:
The patent segments the uplink spectrum into two distinct groups: a first group of subframes dedicated to WAN communication and a second group of subframes dedicated to P2P communication. This segmentation allows P2P communication to be supported without interfering with WAN communication, resolving the contradiction by allocating specific time resources to each communication type while maintaining overall system adaptability.
Solution Approach 2:
The patent implements periodic action by designating specific subframes in a periodic manner for P2P communication within the uplink spectrum. This periodic allocation ensures that P2P communication occurs at predetermined intervals without continuously interfering with WAN communication, thereby reducing interference while maintaining P2P functionality.
2Productivity
If P2P communication is supported concurrently with WAN communication, then network efficiency and UE capacity are improved, but interference between communications worsens
Solution Approach 1:
The patent segments time resources by dividing uplink subframes into two groups: first group subframes for WAN communication and second group subframes for P2P communication. This temporal segmentation eliminates interference between P2P and WAN communications while enabling concurrent operation, thereby improving network efficiency without generating harmful interference.
Solution Approach 2:
The patent resolves the interference issue by transitioning from frequency-domain separation to time-domain separation. Instead of allocating different frequency bands for P2P and WAN communication, the patent uses time division multiplexing to allocate different time slots (subframe groups), thereby supporting concurrent communications without interference.
3Object-affected harmful factors
If time division multiplexing is used to support P2P and WAN communications, then interference is reduced, but device complexity increases
Solution Approach 1:
The patent reduces device complexity by segmenting subframes into two clearly defined groups with distinct purposes. This segmentation provides a simple and clear resource allocation scheme that is easier to manage than more complex multiplexing approaches, thereby reducing device complexity while effectively reducing interference through time-domain separation.
Data Source
AI summary
Techniques for supporting peer-to-peer (P2P) communication and wide area network (WAN) communication are disclosed. In one aspect, a method operable by a network entity to facilitate peer-to-peer (P2P) communication in a wireless network includes designating a first group of subframes in a wide area network (WAN) uplink (UL) spectrum for WAN communication. The method includes designating a second group of subframes in the WAN UL spectrum for P2P communication. The method further includes allowing P2P mobile entities to use WAN physical layer channels in the second group of subframes to communicate P2P control information and P2P data.