Multi-Carrier HSDPA for TD-SCDMA Peak Rate
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Solution Overview
Problem
The existing TD-SCDMA system's single-carrier HSDPA technology provides a low down-peak-rate, which cannot meet the demand for high-speed packet data services, as it is limited to a single carrier frequency and narrow-band TDD mode, resulting in a theoretical peak value speed of only 2.8Mbps.
Innovation Solution
Implementing multi-carrier HSDPA technology by establishing a multi-carrier cell, where data packets for high-speed downlink packet access are transmitted across multiple carriers, allowing the Node B to send data on multiple carriers simultaneously and the UE to receive data on multiple carriers, thereby improving service speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If single-carrier HSDPA technology is used in TD-SCDMA system, then system complexity is kept simple, but service speed and down-peak-rate are limited to low levels
Solution Approach 1:
The patent combines multiple carrier frequencies into a single multi-carrier cell, allowing the system to aggregate bandwidth resources from multiple carriers (e.g., 1.6MHz × N carriers) to achieve higher down-peak-rates and service speeds while maintaining unified cell management and resource allocation mechanisms
2Speed
If multi-carrier HSDPA technology is implemented, then service speed increases to N×2.8Mbps, but channel resource configuration and management complexity increases
Solution Approach 1:
The patent establishes a universal multi-carrier cell framework where a single cell can manage multiple carrier frequencies with unified resource allocation, HARQ process management, and control channel configuration, allowing the same cell identity and resource management mechanisms to operate across N carriers simultaneously
Solution Approach 2:
The patent segments the downlink data transmission across multiple carriers by allocating different HS-PDSCH resources on different carrier frequencies, allowing parallel data transmission while maintaining independent resource management for each carrier within the unified cell structure
Data Source
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AI summary
The present invention discloses a method for implementing multi-carrier HSDPA for TD-SCDMA system, comprises: establishing a multi-carrier cell at the network side, wherein multiple carrier resources in the multi-carrier cell being managed and allocated as a whole at the network side; configuring HS-PDSCH resources on at least one of the carriers of the multi-carrier cell, and at least one pair of HS-SCCH and HS-SICH physical channel resources on at least one of the carriers, at the same time, creating a MAC-hs to manage the channel resources on the carriers and the configuration of the MAC-hs entity itself; the network side allocating HSDPA resources to a user terminal, and sending the HSDPA resources to the user terminal; and the network side dynamically allocating the HSDPA resources on at least one carrier for the user terminal to transmit service data.