Dynamic PDCCH Capacity Balancing Between Macro and Small Cells
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Solution Overview
Problem
In wireless communication systems, the downlink control channel (PDCCH) of base stations can become congested, especially when serving a large number of users, leading to delayed transmissions and other undesirable outcomes due to imbalanced capacity utilization between macro and small cell base stations.
Innovation Solution
A method is introduced to dynamically balance the capacity of PDCCH between macro and small cell base stations by automatically transferring a portion of air interface resources, increasing the capacity of one channel while decreasing the other, without altering the allocation of shared/traffic channel resources, using a controller to detect threshold differences in unused resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the PDCCH capacity is increased to serve more users, then the coverage area is expanded, but the channel becomes congested leading to delayed transmissions
Solution Approach 1:
The patent applies dynamics by enabling dynamic reallocation of PDCCH resources between macro and small cell base stations based on real-time usage patterns. The system continuously monitors and adjusts the capacity allocation, allowing the macro base station to reduce capacity when small cells are heavily utilized, thereby preventing congestion while maintaining coverage flexibility.
Solution Approach 2:
The patent changes the parameter of PDCCH capacity allocation dynamically. By adjusting the capacity parameter of the macro base station's PDCCH based on observed usage patterns and interference conditions, the system optimizes the balance between coverage area and transmission reliability, preventing congestion without sacrificing adaptability.
2Reliability
If the PDCCH capacity of macro base station is reduced to prevent congestion, then transmission delays are reduced, but the coverage area is limited
Solution Approach 1:
The system dynamically adjusts the PDCCH capacity allocation based on real-time conditions. When small cell usage is low, the macro base station can allocate more capacity to maintain coverage. When small cell usage is high, the macro base station reduces capacity to prevent congestion, thus dynamically balancing coverage and reliability.
Solution Approach 2:
The patent implements feedback mechanisms where the network observes actual usage patterns of PDCCH resources and adjusts capacity allocation accordingly. This feedback loop allows the system to learn from historical data and make informed decisions about capacity distribution, optimizing both coverage and transmission reliability.
3Productivity
If the capacity of PDCCH is dynamically adjusted between macro and small cell base stations, then resource allocation is optimized, but the system complexity increases
Solution Approach 1:
The system performs self-adjustment by automatically monitoring usage patterns and reallocating PDCCH resources without requiring manual intervention. The macro and small cell base stations autonomously observe their own and each other's usage patterns, making decisions about capacity allocation to optimize resource utilization while managing system complexity.
Solution Approach 2:
The patent applies preliminary action by using historical data and predictive models to anticipate future usage patterns. The system proactively adjusts capacity allocation before congestion occurs or coverage gaps emerge, rather than reacting to problems after they arise, thereby optimizing resource allocation efficiency while managing complexity through foresight.
Data Source
AI summary
Disclosed is a method and system for balancing control channel resource allocations between base stations. As disclosed, a first base station provides a first downlink control channel including a first set of air interface resources and a second base station provides a second downlink control channel including a second set of air interface resources, the first set of air interface resources and the second set of air interface resources being mutually exclusive. Upon detecting a threshold difference between (i) an extent of a capacity of the first downlink control channel being unused and (ii) an extent of a capacity of the second downlink control channel being unused, the system may change allocation resources between downlink control channels such that (i) capacity of one of the first and second downlink control channels is increased and (ii) capacity of the other one of the first and second downlink control channels is decreased.