HSDPA Data Transfer in Non-CELL_DCH States
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Solution Overview
Problem
In current wireless communication systems, High Speed Downlink Packet Access (HSDPA) is limited to the CELL_DCH state, preventing efficient data transfer in non-CELL_DCH states due to the lack of suitable control plane signaling for Node B to identify the corresponding receiving terminal's H-RNTI, hindering data transmission through the air interface.
Innovation Solution
The method involves encapsulating transmission blocks or protocol data units with H-RNTI or C-RNTI into common transmission channel frames sent through the IUB interface, allowing Node B to use HSDPA characteristics for data transmission by scrambling data with the carried identifier, enabling data transfer in non-CELL_DCH states like CELL_FACH, CELL_PCH, and URA_PCH.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If HSDPA is used only in CELL_DCH state, then the control plane signaling structure remains simple, but data transfer efficiency in non-CELL_DCH states deteriorates
Solution Approach 1:
The invention makes the common transmission channel frame serve multiple functions: it carries both user data (transmission blocks or protocol data units) and control information (H-RNTI or C-RNTI identifiers) simultaneously. This multi-functionality allows HSDPA to operate in non-CELL_DCH states without requiring separate dedicated signaling structures, thus improving data transfer efficiency while avoiding excessive complexity increase.
Solution Approach 2:
The invention merges the control plane signaling (H-RNTI notification) with the user plane data transmission by embedding the H-RNTI/C-RNTI identifier within the common transmission channel frame. This combining approach eliminates the need for separate signaling messages, enabling Node B to identify the receiving terminal and perform HSDPA data transmission in non-CELL_DCH states through a unified structure.
2Adaptability or versatility
If common transmission channel frame is used to carry H-RNTI, then data transmission in non-CELL_DCH state is enabled, but the frame structure complexity increases
Solution Approach 1:
The common transmission channel frame is designed to carry multiple types of information simultaneously: user data (transmission blocks or protocol data units) and terminal identification (H-RNTI or C-RNTI). This multi-functional design enables the frame to support HSDPA data transmission in non-CELL_DCH states while maintaining a relatively simple unified structure that can be processed by existing network elements.
Data Source
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AI summary
In a method for transferring data using HSDPA for data transfer in non-CELL DCH (CELL Dedicated Channel) state provided by the present invention, the common transmission channel frames is used to extra-carry H-RNTI or C-RNTI, and the method includes the following steps: 1.1) RNC encapsulates the transmission blocks or the protocol data units of the downlink data and the H-RNTI or C-RNTI of the corresponding receiving terminal into the common transmission channel frame and transfers them to node B through IUB interface; 1.2) after node B receives and obtains the transmission blocks or the protocol data units and the H-RNTI or C-RNTI of the corresponding receiving terminal, it sends the downlink data through the air-interface according to HSDPA characteristics; 1.3) the corresponding receiving terminal starts to receive the data transmitted on air-interface HS-DSCH channel according to its H-RNTI or C-RNTI monitored through air-interface HS-SCCH channel.