HS-SCCH Control Information Indication for Multi-Carrier Scheduling
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Solution Overview
Problem
In UMTS HSDPA networks, the utilization efficiency of HS-SCCH code channels is low due to the need for independent transmission of control information on each carrier, leading to excessive code channel usage and power consumption by both network devices and user equipment.
Innovation Solution
The method involves sending multiple pieces of control information on a single HS-SCCH channel with a cell identity included in the information field, allowing user equipment to determine the serving cell for data and perform demodulation and decoding, thereby reducing the number of control channels required and improving resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If control information is sent independently on each carrier, then scheduling function is maintained, but code channel utilization efficiency deteriorates
Solution Approach 1:
The patent merges control information from multiple carriers into a single HS-SCCH channel. Specifically, control information that would traditionally be sent separately on each carrier's HS-SCCH is instead consolidated and sent through one shared HS-SCCH channel, reducing the total number of code channels required while maintaining the ability to schedule data on multiple carriers.
Solution Approach 2:
The shared HS-SCCH channel is designed to perform multiple functions: it carries control information for multiple different carriers simultaneously. By including carrier identification information in the control message, a single channel becomes universal for controlling data transmission across multiple carriers, eliminating the need for separate dedicated channels for each carrier.
2Adaptability or versatility
If multiple HS-SCCH channels are configured for multi-carrier, then each carrier can be scheduled independently, but power consumption increases
Solution Approach 1:
The patent combines multiple HS-SCCH channels into a single shared channel for multi-carrier operations. Instead of the UE monitoring and processing separate HS-SCCH channels for each carrier, all control information for all carriers is delivered through one consolidated channel, significantly reducing the processing burden and power consumption at the UE side while maintaining full multi-carrier scheduling capability.
3Loss of information
If independent HS-SCCH transmission is used on each carrier, then control information is carrier-specific, but code channel overhead increases
Solution Approach 1:
The patent merges control information for multiple carriers into a single transmitted message structure. The control information includes identifiers that link each control parameter to its specific carrier, allowing the system to maintain carrier-specific control accuracy while transmitting all control data through a single shared HS-SCCH channel, thereby eliminating redundant code channel overhead.
Data Source
AI summary
Embodiments of the present invention disclose a control information indication method and apparatus, and relate to the field of communications technologies. The method includes: sending at least one piece of control information carried in a first serving cell to a user equipment UE, where the control information includes a cell identity (CID), so that the UE parses an information field of the control information to acquire the CID, determines, according to the CID, a serving cell to which data corresponding to the control information belongs, and performs demodulation and decoding on the data in the serving cell by using the control information.