EUDC Downlink Control Channel Multiplexing With DL-DPCH
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Solution Overview
Problem
Next-generation wireless communication systems face challenges in managing high-speed data transmissions with Enhanced Uplink Dedicated Channel (EUDC) control information, as existing methods require large downlink capacities and high transmission power, leading to interference and hardware modification needs.
Innovation Solution
The method involves multiplexing the EUDC downlink control channel with an existing downlink dedicated physical channel (DL-DPCH) using code or time multiplexing, allowing the EUDC control channel to be transmitted without constructing new shared channels, thus minimizing interference and hardware modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a new shared control channel is constructed on the downlink to handle EUDC control information, then the control information can be transmitted, but large downlink capacities and high transmission power are required which generate downlink inter-cell and intra-cell interference
Solution Approach 1:
The patent merges the EUDC downlink control channel with the existing downlink dedicated physical channel (DL-DPCH) by multiplexing them together. This combines two channels into a single transmitted signal, eliminating the need for a separate shared control channel and avoiding the interference problems associated with high-power transmissions on dedicated control channels.
Solution Approach 2:
The DL-DPCH is made multi-functional by multiplexing the EUDC control information onto it. The same physical channel carries both the original DL-DPCH data and the EUDC control information, allowing the channel to serve multiple purposes without requiring additional dedicated resources that would cause interference.
2Reliability
If a new shared control channel is constructed to handle EUDC control information, then control transmission is enabled, but mobile stations cannot support EUDC control information without additional hardware
Solution Approach 1:
By merging the EUDC control channel with the existing DL-DPCH, the patent leverages the mobile station's existing hardware capabilities to receive and process the combined signal. The mobile station uses its existing demodulation and decoding abilities to handle the multiplexed channel, avoiding the need for additional hardware modifications.
Solution Approach 2:
The mobile station's existing hardware is made to serve the dual purpose of receiving both the original DL-DPCH and the EUDC control information through the multiplexed channel. The station's existing processing capabilities are sufficient to handle the combined signal without requiring external hardware assistance or modifications.
3Reliability
If high transmission power is used to meet transmission performance requirements, then control information can be transmitted reliably, but downlink inter-cell and intra-cell interference increases
Solution Approach 1:
The patent combines the EUDC control information with the DL-DPCH signal, allowing the control information to be transmitted at the same power level as the data channel. This eliminates the need for high-power dedicated control channel transmissions that cause interference, while maintaining reliable control information delivery through the multiplexed channel.
Data Source
AI summary
A system and method for wireless communication includes multiplexing an EUDC downlink control channel so that it is transmitted like a downlink dedicated channel (DL-DPCH). The EUDC downlink control channel can be multiplexed with the DL-DPCH by code or by both code and time. The EUDC downlink control channel may be multiplexed with a downlink dedicated physical data channel (DL-DPDCH), a downlink dedicated physical control channel (DL-DPCCH), or both. In one embodiment, the EUDC downlink control channel is multiplexed by adding a multicode channel to a current DL-DPCH and treating the EUDC downlink control channel as a dedicated channel with power control functionality.