RF Switching Guard Periods for 5G Block Symbol Alignment
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Solution Overview
Problem
In 5G cellular communication, traditional frame structures for block symbol transmissions often require different symbol guard periods, leading to complex signal processing in transmitters and receivers, as they must handle various guard period lengths within a subframe, which complicates alignment with specific constraints like those in the LTE standard.
Innovation Solution
The proposed solution involves placing special block symbols with different guard periods into RF switching guard periods, allowing for flexible and scalable frame structures that maintain a common guard period for regular signal transmissions, simplifying transmitter and receiver implementations by aligning subframe lengths without introducing special symbols with different guard periods within regular symbols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If special block symbols with different guard periods are placed within regular signal transmission areas, then subframe length constraints can be fulfilled, but signal processing circuitry complexity increases due to handling multiple guard period lengths
Solution Approach 1:
The patent extracts special block symbols with different guard periods from the regular signal transmission area and relocates them to the RF switching guard period area. This separation allows regular symbols to maintain a common guard period length, simplifying signal processing circuitry while still fulfilling subframe length constraints through the special symbols in the guard period region.
2Device complexity
If a common guard period is used for all block symbols, then signal processing is simplified, but subframe length constraints cannot be fulfilled
Solution Approach 1:
The patent segments the subframe into two distinct areas: an RF switching guard period area and a regular signal transmission area. The common guard period is applied to all block symbols in the regular signal transmission area, simplifying signal processing. Meanwhile, special block symbols with different guard periods are placed in the RF switching guard period area to fulfill subframe length constraints, thus resolving the contradiction between simplification and constraint fulfillment.
3Adaptability or versatility
If different symbol guard periods are used within a subframe, then flexible frame structures can be achieved, but transmitter and receiver implementations become more complex
Solution Approach 1:
The patent applies different guard period characteristics to different spatial regions within the subframe. The RF switching guard period area accommodates special block symbols with varied guard periods, providing frame structure flexibility. The regular signal transmission area maintains uniform common guard periods, keeping transmitter and receiver implementations simple. This local differentiation resolves the contradiction between flexibility and implementation complexity.
Data Source
AI summary
An apparatus includes circuitry that processes a subframe as part of a time-domain signal frame structure used for radio frequency communications. The subframe includes a plurality of block symbols each having an associated time-domain guard period and one or more radio frequency (RF) switching guard periods. Each block symbol of the plurality of block symbols is either a common block symbol or a special block symbol. A common block symbol has a common time-domain guard period with all other common block symbols of the subframe. A special block symbol has a time-domain guard period different from the common time-domain guard period. All the special block symbols in the subframe are placed into the one or more RF switching guard periods.