Mobile Station PUSCH Scheduling Request and Channel Feedback Transmission
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Solution Overview
Problem
In the EUTRA communication system, the mobile station apparatus cannot simultaneously transmit a scheduling request and a channel feedback report using different channels, leading to resource allocation inefficiencies and delays in uplink data transmission when the channel feedback report is not fed back.
Innovation Solution
The mobile station apparatus transmits a scheduling request using the physical uplink shared channel (PUSCH) when receiving a signal from the base station indicating no uplink data, allowing simultaneous transmission of the scheduling request and channel feedback report without uplink data, thereby enabling efficient resource allocation and rapid uplink data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the mobile station apparatus transmits channel feedback report using PUCCH, then channel quality information is fed back to base station, but scheduling request cannot be transmitted simultaneously
Solution Approach 1:
The patent combines the channel feedback report and scheduling request into a single transmission on the PUSCH channel. When the base station determines that uplink data transmission is not required but channel feedback is needed, it allocates PUSCH resources for control information only, allowing both the channel feedback report and scheduling request to be transmitted simultaneously on this shared channel, thereby resolving the mutual exclusion between PUCCH and scheduling request transmission.
Solution Approach 2:
The PUSCH channel is made multi-functional by enabling it to carry both data transmission and control information transmission. The base station can allocate PUSCH resources for control information only when uplink data is not required, making the PUSCH serve dual purposes: carrying user data when needed and carrying control information (channel feedback report and scheduling request) when data transmission is not required.
2Productivity
If the mobile station apparatus transmits only channel feedback report without uplink data, then resource allocation efficiency improves, but scheduling request transmission is delayed
Solution Approach 1:
The patent merges the scheduling request transmission with the channel feedback report transmission by allocating PUSCH resources for control information. This allows the mobile station to transmit both the channel feedback report and scheduling request in the same time slot, eliminating the delay that would occur if scheduling request had to wait for a separate transmission opportunity, while maintaining resource allocation efficiency.
3Ease of operation
If the base station allocates PUSCH resources for control information only, then simultaneous transmission of channel feedback and scheduling request is enabled, but channel quality feedback accuracy may be affected
Solution Approach 1:
The PUSCH channel is configured for control information transmission with appropriate modulation and coding schemes optimized for control data. The base station can select appropriate transmission parameters (modulation order, coding rate) when allocating PUSCH resources for control information, ensuring that channel feedback reports transmitted on PUSCH maintain sufficient accuracy while enabling simultaneous scheduling request transmission.
Data Source
AI summary
To provide a mobile station apparatus and a communication system that realize an efficient transmission control for a base station apparatus to allocate resources of the PUSCH with appropriate AMC mode in accordance with the channel feedback report and the scheduling request from the mobile station apparatus, and also enable rapid transmission of the uplink data (enable rapid transmission of the UL-SCH) when the mobile station apparatus transmits only the channel feedback report. A mobile station apparatus 200 applied to a system in which a base station apparatus 100 allocates the physical uplink shared channel and the mobile station apparatus 200 transmits uplink data using the physical uplink shared channel, transmits to the base station apparatus 100 the scheduling request requesting the base station apparatus 100 to allocate resources for transmitting the uplink data, using the physical uplink shared channel.