Aperiodic Sounding Reference Signal Frequency Hopping
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting control information due to limited control channel capacity, particularly in multi-user scenarios with multiple antennas, where existing methods struggle to cover the entire frequency band effectively.
Innovation Solution
A method and apparatus for transmitting a narrow-banded aperiodic sounding reference signal by frequency-hopping within the entire frequency bandwidth, using higher layer signaling and PDCCH/EPDCCH to determine time-frequency resources and trigger the signal transmission, allowing efficient allocation of control channels in data regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If control channels are allocated in traditional control regions, then control information can be transmitted, but the control channel capacity is limited and cannot cover the entire frequency band
Solution Approach 1:
The patent extends control channel allocation from traditional time-domain control regions to the frequency domain by allocating control channels in data regions across multiple frequency bands. This dimensional extension allows control information to be transmitted over the entire frequency band, effectively resolving the contradiction between limited control channel capacity and insufficient frequency coverage.
Solution Approach 2:
The patent divides the frequency band into multiple data regions and allocates control channels to different segments. Each control channel is assigned to specific resource blocks within data regions, allowing the system to distribute control information across multiple frequency segments, thereby increasing overall control channel capacity and coverage.
2Reliability
If more control information is transmitted to support MIMO and CoMP technologies, then system performance improves, but the limited control region cannot accommodate all control channels
Solution Approach 1:
The patent moves control channel transmission from the time domain to the frequency domain by utilizing data regions. This allows multiple control channels required for MIMO and CoMP to be transmitted simultaneously across different frequency resources without being constrained by the limited time-domain control region size, thereby supporting enhanced system performance.
Solution Approach 2:
The patent enables data regions to serve dual functions: carrying both data transmissions and control channel transmissions. This multi-functionality allows the system to accommodate increased control information volume for advanced technologies like MIMO and CoMP without sacrificing data transmission capacity, as control and data channels share the frequency resources efficiently.
3Use of energy by moving object
If narrow-banded sounding reference signals are transmitted, then resource allocation is efficient, but the entire frequency band cannot be covered
Solution Approach 1:
The patent divides the frequency band into multiple narrow-banded segments and transmits sounding reference signals across these segments using frequency hopping. Each transmission uses efficient narrow-band resources, while the hopping mechanism ensures comprehensive frequency band coverage over time, resolving the contradiction between transmission efficiency and coverage.
Solution Approach 2:
The patent employs periodic frequency hopping for sounding reference signal transmission. The signal hops to different frequency bands in a periodic manner, allowing efficient narrow-banded transmission at each instance while ensuring complete frequency band coverage through the periodic sequence of hops, thereby balancing efficiency and coverage requirements.
Data Source
AI summary
The present invention relates to a method for transmitting and receiving downlink signal and channel, a terminal therefor and a base station therefor, the method comprising a method for a terminal to transceiver an aperiodic sounding reference signal comprising the steps of: receiving, via a higher layer signaling, two or more parameters for determining a time-frequency resource with which aperiodic sounding signal is transmitted; receiving, via PDCCH and/or EPDCCH, an index designating a parameter set comprising a part of the parameters; receiving, via PDCCH and/or EPDCCH, a signal triggering the aperiodic sounding reference signal; and transmitting the aperiodic sounding reference signal by frequency-hopping to a part of the frequency region within the overall frequency range of interest, frequency hopping being by means of the time-frequency resource corresponding to the parameter received via the higher layer signaling and the parameter included in the parameter set received via the PDCCH and/or the EPDCCH.