Configurable CDMA Control Segment Signaling
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Solution Overview
Problem
There is a need for efficient techniques to send signaling on the reverse link in wireless communication systems, particularly in CDMA systems, where existing methods result in overhead and inefficiencies due to the configuration and management of signaling channels.
Innovation Solution
The proposed solution involves determining transmission parameters for the CDMA control segment, including size, frames, and frequency hopping, and enabling specific signaling channels, which are then processed, encoded, channelized, scaled, and scrambled before being mapped to a time-frequency region for efficient transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple signaling channels are sent on the CDMA control segment, then the functionality and reliability of reverse link signaling is improved, but the overhead and system complexity increases
Solution Approach 1:
The patent implements dynamic configuration of signaling channels where the base station can enable or disable specific CDMA signaling channels based on system conditions and terminal capabilities. Transmission parameters including channel selection, segment size, and frequency hopping are adjusted dynamically rather than being fixed, allowing the system to adapt to changing requirements while maintaining reliability.
Solution Approach 2:
The patent changes multiple parameters of the CDMA control segment including segment size, transmission frames, frequency hopping patterns, and signaling channel configurations. By optimizing these parameters dynamically, the system achieves reliable signaling transmission without requiring a fixed complex structure for all possible signaling scenarios.
2Productivity
If the CDMA control segment size is increased to accommodate more signaling, then the signaling capacity is improved, but the transmission overhead and resource consumption increases
Solution Approach 1:
The CDMA control segment size is configured dynamically based on the actual signaling requirements. The base station determines the appropriate segment size and enables only the necessary signaling channels for current operations, avoiding allocation of resources for unused channels. This dynamic adjustment allows the system to maintain high signaling capacity when needed while reducing overhead during normal operations.
3Reliability
If frequency hopping is applied to the CDMA control segment, then the reception reliability for edge terminals is improved, but the transmission complexity increases
Solution Approach 1:
Frequency hopping is applied selectively to the CDMA control segment transmission based on specific conditions such as terminal location and channel quality requirements. Edge terminals experiencing poor reception are allocated frequency-hopping patterns to improve their reliability, while terminals with good channel conditions use simpler transmission schemes. This localized application of frequency hopping optimizes reliability for those who need it while minimizing overall system complexity.
Data Source
AI summary
Signaling is efficiently sent on a configurable CDMA control segment. To send signaling, transmission parameters for the CDMA control segment for a serving sector are determined. These parameter may indicate the CDMA control segment size, the frames in which the CDMA control segment is sent, the signaling channels to be sent on the CDMA control segment, and so on. The enabled CDMA signaling channels for a terminal and the average transmission interval for each enabled CDMA signaling channel are determined. For each frame in which the CDMA control segment is sent, the signaling channels to be sent on the CDMA control segment in that frame are determined. The signaling for each signaling channel is processed (e.g., encoded, channelized, scaled, and scrambled). The processed signaling for all signaling channels is combined and mapped to a time-frequency region used for the CDMA control segment in the frame.