HSUPA Code Allocation for Circuit Switched Data
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Solution Overview
Problem
Current HSPA systems cannot simultaneously configure dual-carrier uplink high-speed packet access (HSUPA) with circuit switched data calls due to the allocation of all UL codes for maximum rate, leaving no room for dedicated channels needed for circuit switched data, forcing reconfiguration and deactivation of high-data rate features.
Innovation Solution
The method involves determining the presence of a request for a dedicated channel carrying circuit switched data and allocating codes from the high-speed packet access carrier to enable uplink packet switched data transmission while the dedicated channel is ongoing, by reducing the carrier capacity from a full code set to a reduced code set, allowing simultaneous operation with both primary and secondary carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If all UL codes are allocated for maximum HSUPA rate, then uplink packet switched data throughput is improved, but no room remains for dedicated channels needed for circuit switched data calls
Solution Approach 1:
The code set is segmented into two parts: a first code set allocated for HSUPA carriers to maintain high data rate functionality, and a second code set allocated for the dedicated channel to support circuit switched data calls. This segmentation allows both functions to operate simultaneously without resource conflicts.
Solution Approach 2:
The system dynamically changes the code allocation parameters based on service requirements. When circuit switched data calls are active, codes are allocated from the second code set to the dedicated channel while maintaining HSUPA functionality through the first code set, thereby adapting resource distribution to meet varying service demands.
2Speed
If dual-carrier HSUPA is configured with maximum rate features, then peak UL rates are achieved, but circuit switched data calls cannot be supported requiring reconfiguration and deactivation
Solution Approach 1:
The system performs preliminary allocation of the second code set specifically for circuit switched data call support before calls are established. This advance preparation ensures that when circuit switched calls are needed, codes are already available in the second code set, eliminating the need for reconfiguration or deactivation of HSUPA features.
Solution Approach 2:
The code resource management system is designed to be multi-functional, capable of supporting both HSUPA high-speed data transmission and circuit switched data calls simultaneously through separate code sets. This universal design allows the system to adapt to different service types without requiring reconfiguration.
3Adaptability or versatility
If codes are allocated dynamically for dedicated channel, then circuit switched data call support is enabled, but uplink packet switched data capacity is reduced from full code set
Solution Approach 1:
The total code set is divided into a first code set for HSUPA packet switched data and a second code set for dedicated channel circuit switched data. This segmentation ensures that allocating codes to dedicated channels does not reduce the capacity available for packet switched data, as each function has its dedicated code pool.
Data Source
AI summary
There is provided a method including determining, at a user equipment capable of providing uplink packet switched data using at least a first high speed packet access carrier, the presence of a request for a dedicated channel carrying circuit switched data and allocating at least one code from the first high speed packet access carrier for use by the dedicated channel, such that the user equipment is capable of providing uplink packet switched data using the first high speed packet access carrier while the dedicated channel is ongoing.