Dynamic Receiver Bandwidth Switching for Retransmission Scheduling

Solution Overview

Problem

Current wireless communication systems face limitations in scheduling flexibility and power management during retransmissions, as they typically use a fixed receiver bandwidth for both initial and retransmitted data packets, which can lead to inefficient resource allocation and increased power consumption.

Innovation Solution

Implementing dynamic monitoring and scheduling by allowing receiving devices to switch between different receiver bandwidths for initial and retransmitted data packets, with the transmitting device adjusting its scheduling accordingly, enabling the use of wider or narrower bandwidths based on decoding success, thereby improving flexibility and reducing power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a fixed receiver bandwidth is used for both initial transmission and retransmission, then device complexity is reduced and ease of operation is improved, but scheduling flexibility is limited and power consumption increases

Engineering Contradiction:

Improveease of operationVSAvoidscheduling flexibility

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The patent implements dynamic bandwidth adjustment where the receiver bandwidth is changed based on transmission status. For retransmissions, the receiver switches to a second bandwidth (which may be wider or narrower) to improve decoding success probability, while the transmitter dynamically schedules retransmissions according to this changed bandwidth. This dynamic adaptation resolves the contradiction by allowing the system to operate in a fixed bandwidth mode during normal operation (maintaining ease of use) while switching to dynamic bandwidth adjustment when retransmission is needed (improving scheduling flexibility).

Inventive Principle:

Principle #15Dynamics

2Device complexity

If a fixed receiver bandwidth is used for both initial transmission and retransmission, then device complexity is reduced, but power consumption increases due to inefficient resource allocation

Engineering Contradiction:

Improvedevice complexityVSAvoidpower consumption

Core Design Contradiction:

Device complexityVSUse of energy by moving object

Solution Approach 1:

The patent changes the bandwidth parameter dynamically based on transmission success. When a retransmission is needed, the system switches from a first bandwidth to a second bandwidth for the retransmission. This parameter change allows the receiver to allocate power more efficiently by focusing on the appropriate bandwidth for retransmission, reducing wasted power on monitoring unnecessary frequency resources while maintaining low device complexity through the use of standard bandwidth switching mechanisms.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If the receiver switches to a different bandwidth for retransmission, then scheduling flexibility and power management are improved, but device complexity increases

Engineering Contradiction:

Improvescheduling flexibilityVSAvoiddevice complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements dynamic bandwidth adjustment where the receiver bandwidth is changed based on transmission status. For retransmissions, the receiver switches to a second bandwidth (which may be wider or narrower) to improve decoding success probability, while the transmitter dynamically schedules retransmissions according to this changed bandwidth. This dynamic adaptation resolves the contradiction by allowing the system to operate in a fixed bandwidth mode during normal operation (maintaining ease of use) while switching to dynamic bandwidth adjustment when retransmission is needed (improving scheduling flexibility).

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the bandwidth parameter dynamically based on transmission success. When a retransmission is needed, the system switches from a first bandwidth to a second bandwidth for the retransmission. This parameter change allows the receiver to allocate power more efficiently by focusing on the appropriate bandwidth for retransmission, reducing wasted power on monitoring unnecessary frequency resources while maintaining low device complexity through the use of standard bandwidth switching mechanisms.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10932287B2Dynamic monitoring and scheduling in retransmission

Publication Date: 2021.02.23 QUALCOMM INC

AI summary

Methods, systems, and devices for dynamic monitoring and scheduling in retransmission are described for wireless communications. For example, a receiving device may receive a data transmission in a first receiver bandwidth, determine that a data packet of the data transmission was unsuccessfully decoded, switch to a second receiver bandwidth that is wider than the first receiver bandwidth or narrower than the first receiver bandwidth (e.g., based on determining that the data packet was unsuccessfully decoded), and receive a retransmission of the data packet in the second receiver bandwidth. In another example, a transmitting device may schedule a data transmission according to a first receiver bandwidth, receive an indication that a data packet of the data transmission was unsuccessfully decoded, and schedule a retransmission of the data packet according to a second receiver bandwidth that is wider than the first receiver bandwidth or narrower than the first receiver bandwidth.