Multi-Antenna Mode Power Control for Wireless Interference
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Solution Overview
Problem
In wireless communication systems, higher quality of service (QoS) devices often experience signal degradation due to nearby lower QoS devices transmitting at higher power levels, which can limit their ability to switch to higher bandwidth multi-antenna modes.
Innovation Solution
A communication system determines the proximity of lower QoS devices to higher QoS devices and sends control messages to instruct the lower QoS devices to reduce their transmit power, thereby improving the signal-to-interference and noise ratio (SINR) for higher QoS devices, allowing them to switch to higher bandwidth multi-antenna modes like spatial multiplexing MIMO.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lower QoS devices transmit at higher power levels, then their communication reliability is improved, but higher QoS devices experience signal degradation due to interference
Solution Approach 1:
The patent applies local quality by implementing QoS-based power control where different transmit power levels are assigned to different QoS classes. Lower QoS devices (e.g., bronze, silver) are instructed to transmit at reduced power levels when higher QoS devices (e.g., gold) are present in the vicinity, while maintaining normal power levels when interference is not an issue. This localized adjustment of transmission power based on device profile and spatial distribution resolves the contradiction between maintaining communication reliability for lower QoS devices and preventing signal degradation for higher QoS devices.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting the transmit power parameter based on QoS class and device location. The base station monitors the distribution of devices with different QoS profiles and sends control messages to lower QoS devices to reduce their transmit power when higher QoS devices are detected in the same or adjacent cells. This dynamic parameter adjustment resolves the contradiction by adapting the transmission power to the current network conditions and QoS requirements.
2Productivity
If higher QoS devices use higher bandwidth multi-antenna modes, then their data rate is improved, but they require higher SINR that may not be available due to interference from lower QoS devices
Solution Approach 1:
The patent applies preliminary action by proactively controlling the transmit power of lower QoS devices before higher QoS devices attempt to switch to higher bandwidth multi-antenna modes. The base station monitors the presence and distribution of lower QoS devices and preemptively instructs them to reduce transmit power when higher QoS devices are present, thereby ensuring that sufficient SINR is available for higher QoS devices to utilize high-order MIMO modes without interruption or failure.
Solution Approach 2:
The patent applies local quality by creating localized high-SINR zones around higher QoS devices through power control of neighboring lower QoS devices. This enables higher QoS devices to access high-bandwidth multi-antenna modes (such as 4x4 MIMO or spatial multiplexing) in their local vicinity while lower QoS devices operate at reduced power levels, thus resolving the contradiction between achieving high data rates and maintaining sufficient SINR.
3Area of stationary object
If lower QoS devices transmit at normal power levels, then their coverage area is maintained, but higher QoS devices in their vicinity experience interference
Solution Approach 1:
The patent implements dynamics by making the transmit power of lower QoS devices dynamic rather than static. The base station continuously monitors the spatial distribution of devices with different QoS profiles and adjusts the transmit power of lower QoS devices in real-time based on the presence and location of higher QoS devices. When higher QoS devices are present in the same or adjacent cells, lower QoS devices are instructed to reduce power; when no higher QoS devices are present, lower QoS devices can transmit at normal power levels, thus dynamically balancing coverage area and interference.
Solution Approach 2:
The patent applies parameter changes by dynamically modifying the transmit power parameter of lower QoS devices based on network conditions and device distribution. The base station sends control messages to adjust the power parameter of lower QoS devices when higher QoS devices are detected in the vicinity, and restores normal power levels when the interference condition no longer exists, thus resolving the contradiction between maintaining coverage area and reducing interference.
Data Source
AI summary
A wireless device associated with a first profile is communicated with using a first multi-antenna mode. Communication is received from a plurality of wireless devices associated with a second profile. The plurality of wireless devices are determined to be located within a defined area of the wireless device. Based on the determination that the plurality of wireless devices are located within the defined area of the wireless device, at least one of the plurality of wireless devices is sent at least one control message that instructs the at least one of the plurality of wireless devices to transmit a future communication at a lower power level.