NB-IoT PRB Allocation for PDCCH Congestion
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Solution Overview
Problem
The current Narrowband Internet of Things (NB-IoT) communication framework experiences service congestion and reduced scheduling flexibility due to excessive communication load on specific Physical Resource Blocks (PRBs).
Innovation Solution
The method involves determining one or more PRBs other than the current PRB for transmitting associated channels of a current Physical Downlink Control Channel (PDCCH), and transmitting these channels on the determined PRBs. This approach allows for the distribution of communication load across multiple PRBs, thereby alleviating congestion and enhancing scheduling flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If NB-PDCCH and NB-PDSCH are transmitted in the same PRB configured by higher-layer signaling, then the transmission structure is simple and easy to implement, but the communication load on one PRB increases excessively, resulting in service congestion and reduced scheduling flexibility
Solution Approach 1:
The patent segments the transmission resources by separating NB-PDCCH and NB-PDSCH into different PRBs. The base station determines a first PRB for NB-PDCCH and a second PRB for NB-PDSCH, distributing communication load across multiple PRBs rather than concentrating it in one PRB, thereby avoiding service congestion and improving scheduling flexibility
Solution Approach 2:
The patent introduces frequency domain dimension by using different PRBs for control channel and data channel transmissions. This dimensional separation allows independent resource allocation and scheduling in the frequency domain, enhancing scheduling flexibility while maintaining implementation simplicity through standardized procedures
2Device complexity
If NB-PDCCH and NB-PDSCH are transmitted in the same PRB, then the resource allocation is concentrated and easy to manage, but the communication load on that PRB increases, leading to service congestion
Solution Approach 1:
The patent divides the resource allocation into separate PRBs for NB-PDCCH and NB-PDSCH. The base station determines a first PRB for control channel and a second PRB for data channel, segmenting the communication load to prevent congestion on any single PRB while maintaining manageable resource allocation through standardized determination procedures
Solution Approach 2:
The patent enables dynamic PRB selection for NB-PDCCH and NB-PDSCH transmissions. The base station can flexibly determine different PRBs based on current network conditions, user requirements, and traffic patterns, allowing adaptive resource management that responds to changing communication demands without increasing overall system complexity
Data Source
AI summary
A method of transmitting information includes: determining one or more physical resource blocks (PRBs) for transmitting one or more associated channels of a current physical downlink control channel (PDCCH) and transmitting the one or more associated channels on the one or more determined PRBs. The one or more determined PRBs include one or more PRBs other than a current PRB for transmitting the current PDCCH. By determining one or more PRBs for transmitting the one or more associated channels of the current PDCCH or for repeatedly transmitting the current PDCCH, with the one or more determined PRBs including one or more PRBs other than the current PRB for transmitting the current PDCCH, when the one or more associated channels are transmitted on the one or more determined PRBs, it can avoid service congestion caused by excessive load on a certain PRB, and can improve a scheduling flexibility.