Signaling Control Region Parameters for CoMP Access Points
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Solution Overview
Problem
In wireless communication systems, coordinating multiple transmission points to determine a common control region for CoMP communications is challenging due to varying control region sizes and starting points among access points, which affects data transmission and interference estimation.
Innovation Solution
A method where a serving access point signals control region parameters to wireless devices, allowing them to determine a common control region across multiple carriers and access points, enabling accurate data decoding and interference measurement by utilizing blank resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If control region parameters are not standardized across multiple access points, then each access point can independently optimize its control region configuration, but wireless devices cannot accurately determine the common control region for CoMP communications
Solution Approach 1:
The patent applies parameter changes by signaling control region parameters (such as control region size and starting position) from the serving access point to the wireless device. These parameters define the common control region configuration across multiple access points, allowing the wireless device to accurately determine where control information and data portions are located in received signals without requiring complex coordination between access points.
2Reliability
If control region sizes vary among access points, then each access point can adapt to its specific transmission conditions, but data decoding becomes unreliable due to misalignment of control and data regions
Solution Approach 1:
The patent applies segmentation by dividing the resource allocation into distinct control region and data portion based on signaled parameters. The control region parameters indicate the size and position of the control region, allowing the wireless device to segment the received signal appropriately and reliably decode the data portion that follows, even when different access points have different control region configurations.
3Measurement precision
If interference estimation is performed without standardized control regions, then access points can operate independently, but interference measurement accuracy deteriorates due to inconsistent resource element mapping
Solution Approach 1:
The patent applies universality by establishing a common control region configuration that is signaled to the wireless device and applies across multiple access points participating in CoMP communications. This universal configuration enables consistent resource element mapping for both control information and data portions, allowing accurate interference estimation while maintaining operational simplicity through parameter-based control rather than complex coordination procedures.
Data Source
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AI summary
Systems and methodologies are described that facilitate determining control region parameters related to a plurality of carriers and/or coordinated multiple point (CoMP) access points. Wireless devices can receive control region parameters related to the carriers or CoMP access points from a serving access point over control channel resources. Additionally or alternatively, wireless devices can assume all carriers or CoMP access points have substantially the same control region as indicated in a control format indicator channel from the serving access point or based on a configured value.