Wireless Scheduling Gain Adjustment for Coordinated Regions
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Solution Overview
Problem
In wireless communication systems, abrupt changes in channel quality when terminals move between different scheduling regions lead to inefficient data transmission, as existing methods do not adequately adjust Modulation and Coding Scheme (MCS) levels to account for these changes.
Innovation Solution
A method and apparatus that set a gain based on the amplitude of the reverse pilot channel signal to adjust MCS levels when a terminal moves between regions with and without coordinated scheduling, using a receiver, gain setter, and controller to determine the terminal's location and adjust the MCS levels accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If coordinated scheduling is performed in boundary regions of cells, then inter-cell interference is reduced and resource reuse rate is increased, but channel quality changes abruptly when terminals move between inner regions and boundary regions
Solution Approach 1:
The system performs preliminary detection of terminal location (inner region vs. boundary region) and pre-calculates the appropriate MCS level adjustment gain before data transmission. This allows the system to proactively compensate for upcoming channel quality changes when terminals move between regions, rather than reacting after the change occurs.
Solution Approach 2:
The invention dynamically adjusts the MCS level parameter based on the terminal's location and movement state. By changing the MCS level according to the detected gain (which varies with terminal position and coordinated scheduling status), the system adapts to channel quality variations caused by moving between inner and boundary regions.
2Device complexity
If MCS levels are allocated without considering terminal movement between scheduling regions, then resource allocation is simplified, but data transmission efficiency deteriorates due to abrupt channel quality changes
Solution Approach 1:
The system transitions from static MCS level allocation to dynamic allocation by continuously monitoring terminal location and movement state. The MCS level is adjusted in real-time based on detected changes in coordinated scheduling status, allowing the system to adapt to varying channel conditions while maintaining manageable complexity through rule-based adjustment.
Solution Approach 2:
The invention implements a feedback mechanism where the system detects terminal location, determines whether the terminal has moved between inner and boundary regions, and uses this information to adjust the MCS level accordingly. This closed-loop approach ensures data transmission efficiency is maintained by continuously adapting to channel quality changes.
3Reliability
If a low MCS level is selected for terminals in bad channel conditions, then reliable transmission is guaranteed, but data transfer rate is reduced
Solution Approach 1:
The system pre-determines the appropriate MCS level adjustment gain based on terminal location and movement detection before transmission. By anticipating channel quality changes due to terminal movement between regions with and without coordinated scheduling, the system can proactively select optimal MCS levels that maintain reliability while maximizing data transfer rate.
Solution Approach 2:
The invention dynamically changes the MCS level parameter based on the detected gain, which is determined by terminal location and movement state. This allows the system to transition between different MCS levels appropriately - using lower MCS levels when reliability is critical and higher MCS levels when channel conditions permit, thereby balancing reliability and data transfer rate.
Data Source
AI summary
A method and apparatus for scheduling in a wireless communication system configured for coordinated scheduling are disclosed.The scheduling apparatus sets a gain to be obtained when a terminal performs coordinated scheduling in a neighboring cell. The scheduling apparatus determines whether the terminal in the neighboring cell has moved between a first region where coordinated scheduling is not performed and a second region where coordinated scheduling is performed. Next, if it is determined that the terminal in the neighboring cell has moved between the first region where coordinated scheduling is not performed and the second region where coordinated scheduling is performed, the scheduling apparatus controls the radio unit in the neighboring cell to set an Modulation and Coding Scheme (MCS) level based on the gain and perform scheduling based on the MCS level.