Multi-Carrier TD-SCDMA Uplink Throughput via Dynamic Channel Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing high speed uplink packet access technologies, such as HSUPA, face challenges when integrated into multi-carrier TD-SCDMA systems, as they require adaptations to manage carrier resources efficiently and ensure high throughput, especially in supporting multiple carriers and diverse user equipment requirements.
Innovation Solution
The proposed method configures E-PUCH, E-AGCH, and E-HICH physical channel resources on multiple carriers, allowing dynamic allocation and scheduling of E-DCH transport data through MAC-e/MAC-es entities, enabling both scheduling and non-scheduling transport modes, with the option for these channels to be on the same or different carriers for each user equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If HSUPA technology is introduced into multi-carrier TD-SCDMA system, then uplink transport throughput is improved, but device complexity increases due to multiple carrier resource management
Solution Approach 1:
The patent divides the multi-carrier system into independent carrier units, where each carrier can be independently configured with E-PUCH, E-AGCH, and E-HICH channels. This segmentation allows the system to manage each carrier separately, reducing the overall complexity of resource management while maintaining high throughput across multiple carriers.
Solution Approach 2:
The patent introduces a new dimension of carrier frequency resource allocation by allowing E-PUCH, E-AGCH, and E-HICH channels to be configured on different carriers. This multi-dimensional resource allocation approach enables the system to achieve high throughput by utilizing multiple frequency resources simultaneously while managing complexity through structured channel configuration rules.
2Adaptability or versatility
If multiple physical channels are configured on multiple carriers, then resource allocation flexibility is improved, but system overhead increases
Solution Approach 1:
The patent makes the E-PUCH, E-AGCH, and E-HICH physical channels universal across multiple carriers, where the same channel types can be configured on different carriers according to system requirements. This multi-functionality allows flexible resource allocation while reusing channel structures, thereby controlling overhead.
Solution Approach 2:
The patent allows different carriers to have different channel configurations based on local requirements. Specifically, it enables selective configuration of E-PUCH, E-AGCH, and E-HICH on different carriers, allowing the system to allocate resources flexibly where needed while avoiding unnecessary overhead on carriers where certain channels are not required.
3Productivity
If dynamic scheduling is implemented across multiple carriers, then data transmission efficiency is improved, but control signaling overhead increases
Solution Approach 1:
The patent segments the control signaling function by introducing separate E-AGCH channels on different carriers, allowing scheduling information to be distributed across multiple carriers. This segmentation enables efficient data transmission on the data carrier while controlling signaling overhead by using dedicated control carriers or shared control resources.
Solution Approach 2:
The patent uses E-AGCH as an intermediary channel that carries scheduling grants from the network to the user equipment. By establishing E-AGCH on appropriate carriers, the system enables efficient dynamic scheduling while managing control overhead through structured grant transmission mechanisms that reduce redundant signaling.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A high speed uplink packet access method and system used for multi-carrier TD-SCDMA system are disclosed. The method comprises the following steps: carrier resources on which the scheduling enhanced physical uplink channels are configured are allocated to user equipment; the enhanced absolute grant channel and the enhanced HARQ acknowledgement indicator channel are configured on the allocated carrier resources; the data from the enhanced dedicated transport channel are mapped through media access control layer onto the enhanced dedicated channel and further mapped onto the scheduling enhanced physical uplink channel; the scheduling enhanced physical uplink channels are granted to the user equipment through the enhanced absolute grant channel, so as to transmit the data from the enhanced dedicated transport channel to the base station; the base station feeds back the status information about receiving the data from the enhanced dedicated transport channel to the user equipment through the enhanced HARQ acknowledgement indicator channel. With the present invention, the carrier resources in multi-carrier TD-SCDMA system are utilized sufficiently and thus the cell uplink transport throughput is improved.