Co-frequency Networking for Trunking Services via Pre-coding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional co-frequency networking technologies are not applicable to trunking services due to high error rates in data decoding for multiple user equipment (UEs), as they rely on beamforming and are designed for unicast scenarios, failing to accurately transmit data to multiple UEs.
Innovation Solution
The implementation of a method and apparatus for co-frequency networking in trunking services using multiple transmission trunking ports with trunking-specific reference signals, pre-coding multi-layer data flows, and resource mapping to enhance data redundancy and accuracy, allowing simultaneous data transmission to multiple UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beamforming technology with dedicated adjustment reference signal is used for co-frequency networking, then downlink channel condition estimation accuracy is improved for unicast UE, but decoding accuracy deteriorates for multiple UEs in trunking service
Solution Approach 1:
The patent segments the reference signal resource into multiple trunking-specific reference signals, each corresponding to a specific transmission trunking port. This segmentation allows each UE to use the reference signal matched to its receiving trunking port for channel estimation, rather than relying on a single dedicated adjustment reference signal designed for unicast scenarios. The segmentation resolves the contradiction by enabling accurate channel estimation for multiple UEs simultaneously, thereby improving data decoding accuracy for all UEs in trunking service.
Solution Approach 2:
The patent applies local quality by configuring different trunking-specific reference signals for different transmission trunking ports based on local channel characteristics. Each transmission trunking port has its own reference signal that is optimized for the specific channel conditions of that port. This allows the system to adapt to local channel variations for each UE-receiving trunking port, improving downlink channel condition estimation accuracy and consequently data decoding accuracy for multiple UEs.
2Productivity
If CoMP transmission technology is used for co-frequency networking, then spectrum utilization is improved, but the technology becomes inapplicable to trunking service due to high error rates
Solution Approach 1:
The patent makes the reference signal system universal by introducing trunking-specific reference signals that can serve multiple UEs simultaneously in trunking service, whereas the conventional dedicated adjustment reference signal was designed only for unicast scenarios. The trunking-specific reference signals enable the CoMP transmission technology to function effectively for both unicast and trunking services, resolving the inapplicability issue and enabling high-error-rate scenarios to be corrected through proper reference signal matching.
3Device complexity
If base station estimates downlink channel condition using uplink channel condition from one UE, then estimation process is simplified, but decoding accuracy deteriorates for other UEs receiving same downlink data
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple trunking-specific reference signals at the base station before actual data transmission. These reference signals are prepared in advance for each transmission trunking port, enabling the UE to perform accurate channel estimation without requiring real-time uplink channel feedback from each UE. This preliminary configuration resolves the contradiction by maintaining low estimation complexity while achieving high decoding accuracy for all UEs.
Data Source
AI summary
A method, an apparatus and a system for co-frequency networking based on a trunking service are provided. The method includes: acquiring a multi-layer data flow generated through a layer mapping process; pre-coding the multi-layer data flow with a preset multi-port pre-coding method to obtain encoded data of each of the transmission trunking ports, where the multi-port pre-coding method matches with the preset plurality of transmission trunking ports; performing resource mapping on the encoded data and the trunking-specific reference signal of each of the transmission trunking ports to obtain transmission data of the transmission trunking port; and transmitting the transmission data of each of the transmission trunking ports to reception trunking ports which match with the transmission trunking port using the transmission trunking port.