Uplink Scheduling via DCI Power Allocation
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Solution Overview
Problem
In Licensed Assisted Access (LAA) uplink communication, the determination of authorization information and allocation of transmit power among carriers and channels is not clearly defined in existing technologies, leading to inefficiencies in power management and channel allocation.
Innovation Solution
An uplink scheduling method and apparatus where a User Equipment (UE) receives Downlink Control Information (DCI) from a base station to determine and allocate transmit power for uplink channels or signals based on configuration information, including specific bits for carrier indicators, resource block assignments, and transmit power control commands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If LAA uplink communication is implemented without clear authorization information determination and transmit power allocation rules, then the system can support both licensed and unlicensed carriers, but the power management and channel allocation become inefficient and ambiguous
Solution Approach 1:
The patent applies parameter changes by introducing specific DCI format parameters (format 0 or 4 with LAA indication) that carry authorization information and transmit power allocation rules. The DCI includes parameters such as carrier indicator, resource block assignment, and TPC commands that dynamically adjust power allocation across licensed and unlicensed carriers, transforming the ambiguous power management into a controlled parameter-based system
Solution Approach 2:
The patent segments the transmit power allocation by introducing separate power control mechanisms for different carriers (licensed carrier 210 and unlicensed carrier 220) and different channels (PUCCH 202, PUSCH 204, SRS 206). The base station independently controls power allocation for each segment through dedicated DCI parameters, allowing fine-grained power management across multiple carriers and channels
2Productivity
If multiple carriers and channels are used for uplink transmission, then the system capacity and flexibility increase, but the complexity of transmit power allocation and authorization determination increases
Solution Approach 1:
The patent implements universality by designing a multi-functional DCI structure (format 0 or 4) that simultaneously handles multiple functions: carrier indication, resource allocation, transmit power control, and authorization determination. This single DCI message controls multiple uplink channels (PUCCH, PUSCH, SRS) across multiple carriers, reducing the need for separate control mechanisms for each channel and carrier
Solution Approach 2:
The patent introduces DCI as an intermediary that mediates between the base station's scheduling decisions and the UE's transmit power allocation. The DCI carries TPC commands and authorization information that translate high-level scheduling intentions into specific power allocation actions, simplifying the complexity by providing a standardized intermediate control layer
3Adaptability or versatility
If authorization information is not clearly defined in the standard, then the system can accommodate different carrier types, but the determination of authorization information and transmit power becomes ambiguous and inefficient
Solution Approach 1:
The patent resolves the ambiguity by defining specific DCI parameters that carry authorization information. The DCI format 0 or 4 includes explicit parameters such as carrier indicator, resource block assignment, and TPC commands that precisely determine authorization status and power allocation. This transforms the ambiguous authorization determination into a precise parameter-based decision process
Solution Approach 2:
The patent implements feedback mechanisms where the base station monitors uplink transmissions and sends updated DCI messages with adjusted TPC commands and authorization information. This closed-loop feedback ensures that authorization information remains accurate and up-to-date, allowing the system to adapt to changing conditions while maintaining precise control
Data Source
AI summary
Provided is an uplink scheduling method and apparatus. The method includes that a User Equipment (UE) receives Downlink Control Information (DCI) sent by a base station, and the UE sends an uplink channel or/and an uplink signal and determines transmit power of the channel or/and the signal according to configuration information of the base station and the DCI.