Interference Reporting Optimization for Coexisting Radios
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems with coexisting radios, in-device coexistence interference occurs due to the proximity of multiple radio transceivers, leading to issues where current filter technologies may not provide sufficient rejection, especially when different radio technologies operate on adjacent frequencies, necessitating alternative methods to manage interference.
Innovation Solution
A method is introduced where a device with coexisting radios and capable of carrier aggregation determines changes in the activation status of secondary cells, compares interference information, and decides whether to report it, thereby reducing unnecessary reporting and minimizing interference by using stored information when no change is detected, and reporting only new interference information to the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple radio transceivers are equipped in a single device to enable access to various networks and services, then the versatility and connectivity of the device is improved, but in-device coexistence interference occurs between the collocated radio transceivers
Solution Approach 1:
The patent segments the operation of multiple radio transceivers by dividing time into different periods, allocating specific time slots to different radio technologies (e.g., LTE, WiFi, Bluetooth) to operate sequentially rather than simultaneously, thereby reducing mutual interference while maintaining versatility
Solution Approach 2:
The patent implements periodic action by establishing recurring time patterns where different radio transceivers are activated in alternating periods. The network entity configures periodic time-domain multiplexing patterns that rhythmically switch between different radio operations, preventing continuous interference while ensuring each radio technology receives regular operational opportunities
2Object-affected harmful factors
If current filter technologies are used to separate transmit and receive signals, then signal separation is achieved, but sufficient rejection cannot be provided when different radio technologies operate on adjacent frequencies
Solution Approach 1:
The patent introduces time-domain multiplexing as an intermediary mechanism between conflicting radio signals. Instead of relying solely on frequency-based filtering, the system uses time slots as a mediator to separate transmit and receive operations, allowing signals on adjacent frequencies to operate without direct interference by ensuring they do not occur simultaneously
Solution Approach 2:
The patent segments the frequency bands and time operations such that different radio technologies operate in dedicated time slots within their respective frequency bands. This segmentation approach complements filter technologies by adding a temporal dimension to signal separation, achieving sufficient rejection where frequency filtering alone is inadequate
3Reliability
If a device reports interference information to the network entity for every change in activation status of secondary cells, then the network can respond to interference conditions, but unnecessary reporting overhead increases when no actual interference change occurs
Solution Approach 1:
The patent implements feedback by having the device compare newly determined interference information against previously reported information before sending updates. The network entity receives feedback only when actual changes in interference conditions occur, allowing the system to maintain reliable interference management while filtering out redundant reports that would increase overhead without providing new information
4Productivity
If carrier aggregation is used to aggregate multiple component carriers to increase bandwidth, then the data transmission capacity is improved, but the complexity of managing coexisting radios and interference increases
Solution Approach 1:
The patent segments the management of aggregated carriers by associating each component carrier with specific time slots and radio technologies. This segmentation simplifies the complexity of managing multiple coexisting radios on aggregated carriers by providing clear temporal boundaries for each radio's operation, making the system more manageable despite the increased bandwidth capability
Data Source
AI summary
Methods and apparatus for control of a device with coexisting radios and capable of carrier aggregation are disclosed. A change in the activation status of a secondary cell can be determined where after interference information to be reported is determined in response to the determined change. The determined interference information is compared to interference information reported previously for a similar change, and a decision is made based thereon whether to send the determined interference information. In a network entity interference information received from at least one device is stored. The stored interference information is used in the control when it is determined that no interference information is received subsequent to a new change in the activation status of the secondary cell.