HS-SCCH Code Configuration for Common State Monitoring
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Solution Overview
Problem
In the 3GPP communication protocol, user equipment (UE) in the common state of an enhanced connecting mode needs to configure correct Channelisation codes and scrambling codes to de-spread and de-scramble signaling information on the High Speed Downlink Shared Channel (HS-DSCH), but existing methods lack a systematic approach for providing these codes in the absence of dedicated processes.
Innovation Solution
A method and system where the Radio Network Controller (RNC) informs the UE via signaling with configured Channelisation codes and/or scrambling codes, which the UE then uses to de-spread and de-scramble the High Speed Shared Control Channel (HS-SCCH) signaling information, utilizing system broadcast messages or common carrier messages for code acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE monitors HS-SCCH in common state using H-RNTI, then UE can acquire signaling parameters of HS-PDSCH, but UE cannot correctly receive data without dedicated process and pre-configured codes
Solution Approach 1:
The RNC performs preliminary configuration of Channelisation codes and scrambling codes for HS-SCCH before UE needs to monitor the channel in common state. This pre-configuration eliminates the need for dedicated processes at UE side, allowing direct monitoring and correct data reception using pre-assigned codes.
Solution Approach 2:
The system enables UE to self-configure HS-SCCH monitoring by providing autonomous access to Channelisation codes and scrambling codes through system information broadcasting, without requiring dedicated RRC processes or network-side code assignment during active monitoring.
2Manufacturing precision
If UE uses correct Channelisation codes and scrambling codes to de-spread and de-scramble HS-SCCH, then UE can correctly receive HS-PDSCH data, but system requires complex code management and signaling
Solution Approach 1:
The invention uses universal Channelisation codes and scrambling codes that can be applied to both dedicated and common states. The same code sets are broadcast in system information and can be used by any UE in common state, eliminating the need for state-specific code management while maintaining signal processing accuracy.
Solution Approach 2:
The system changes the parameter delivery mechanism from dedicated RRC signaling to system information broadcasting. By modifying how codes are transmitted (from UE-specific to general broadcast), the system maintains processing accuracy while reducing management complexity.
3Ease of operation
If system broadcasts Channelisation codes and scrambling codes via system information, then UE in common state can acquire codes without dedicated process, but signaling overhead increases
Solution Approach 1:
The invention merges HS-SCCH code configuration information with existing system information broadcasts (System Information Type 5 and 6). By combining code assignment with regular system information updates, the system achieves easy code acquisition without adding separate dedicated signaling channels.
Solution Approach 2:
The broadcasted Channelisation codes and scrambling codes serve multiple purposes: they enable HS-SCCH monitoring in common state, provide code sets for potential HS-DPA operations, and maintain compatibility with existing system information structures, thereby reducing overall signaling requirements.
Data Source
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AI summary
This invention discloses a method and a HS-SCCH used by UE in a common state of an enhanced connecting mode. The method includes the following steps: Step 102, informing the UE via signaling of the Channelisation code and/or the scrambling code of HS-SCCH that can be used by the UE in the common state of the enhanced connecting mode, by means of RNC; Step 104, acquiring the Channelisation code and/or the scrambling code from the signaling by means of UE; and Step 106, when monitoring the HS-SCCH, use the Channelisation code and/or the scrambling code to perform de-spread and de-scramble on the HS-SCCH, by means of UE.With the solution according to this invention, the UE can use correct Channelisation code and scrambling codes to de-spread and de-scramble the signaling information carried on HS-SCCH,