Radio Access Network Codec Assignment via Walsh Code Distribution
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Solution Overview
Problem
Conventional wireless communication systems inefficiently manage transmission capacity by selecting data coding rates without considering the distribution of Walsh code types, leading to suboptimal allocation of transmission resources.
Innovation Solution
A method in a radio access network device that allocates a new cover code for communication sessions based on the distribution of existing cover codes and updates this distribution, determining a coding rate that accounts for both the updated distribution and capacity loading in the wireless coverage zone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data coding rates are selected without considering the distribution of Walsh code types, then the codec assignment process is simple, but the transmission capacity allocation is inefficient
Solution Approach 1:
The system performs preliminary tracking and recording of Walsh code type distribution before codec assignment. The base station maintains a record of how many active calls are using RC3 versus RC4 Walsh codes, and uses this pre-collected information to inform the codec selection process, thereby improving transmission capacity allocation without adding complex real-time analysis
Solution Approach 2:
The system implements feedback by continuously monitoring the distribution of RC3 and RC4 calls in the sector and using this information to dynamically adjust codec assignment decisions. The base station feeds back the Walsh code distribution state to the codec selection process, creating a closed-loop system that optimizes transmission capacity allocation based on current network conditions
2Speed
If higher coding rates are used to improve transmission speed, then data transmission efficiency increases, but transmission power consumption increases
Solution Approach 1:
The system dynamically adjusts coding rate selection based on real-time Walsh code distribution and sector capacity loading conditions. Rather than using a fixed coding rate, the base station adapts the coding rate to current network state, selecting higher rates when capacity is available and lower rates when the sector is congested, thereby optimizing the trade-off between transmission speed and power consumption
Solution Approach 2:
The system changes the coding rate parameter based on the distribution of RC3 and RC4 calls and overall sector loading. When RC4 calls (which require higher power) are prevalent or when sector capacity is high, the system selects lower coding rates to reduce power consumption. When RC3 calls dominate or capacity is low, higher coding rates are permitted, optimizing the balance between data rate and power usage
3Quantity of substance
If more RC4 calls are allocated to increase channel capacity, then the number of supported calls increases, but forward link power utilization increases
Solution Approach 1:
The base station performs preliminary assessment of the RC3/RC4 call distribution and sector power capacity before admitting new calls. By tracking the current mix of RC3 and RC4 calls and the associated power consumption, the system can predict the impact of admitting additional RC4 calls and make informed decisions to prevent power utilization from exceeding acceptable thresholds
Solution Approach 2:
The system dynamically balances the allocation of RC3 versus RC4 calls based on current power utilization and capacity loading. When forward link power utilization becomes high, the system preferentially admits RC3 calls (which consume less power) or rejects new calls. When power utilization is low and capacity is available, the system can admit RC4 calls to increase the number of supported calls, creating a dynamic optimization of both quantity and power efficiency
Data Source
AI summary
A method and system is disclosed for coordinating codec assignment and radio configuration in wireless communication sessions. When a communication session is set up for an access terminal (AT) operating in a wireless communication system, a network device, such a base station, can determine a coding rate to assign the AT for its air interface in a manner that accounts for radio configuration in a wireless coverage zone of the base station. The base station could use a distribution of types of cover codes in use to monitor radio configuration, and then assign a codec and coding rate for new calls based on the distribution.