Wireless SS Block Signaling With Dual-Purpose PBCH Fields
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Solution Overview
Problem
The existing New Radio (NR) system faces challenges in reducing bit overheads and terminal processing complexity in the transmission of synchronization signal blocks.
Innovation Solution
The use of a first indication field in a PBCH of an SS block to indicate either a PRB grid offset or resource information of another SS block, along with a second indication field to clarify the purpose of the first indication field, thereby optimizing the signaling overheads and reducing terminal detection complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a first indication field in a PBCH of an SS block is used to indicate resource information of another SS block, then signaling overhead is reduced, but terminal processing complexity increases due to the need to determine the purpose of the indication field
Solution Approach 1:
The first indication field in the PBCH is designed to serve multiple purposes: it can indicate either a PRB grid offset for control resource sets or resource information for another SS block. This multi-functionality allows the same field to reduce signaling overhead for different types of information, directly addressing the contradiction by reducing bit overhead while managing terminal processing complexity through clear determination rules
Solution Approach 2:
A second indication field is introduced as an intermediary element to clarify the purpose of the first indication field. This second field acts as a mediator that helps the terminal device determine whether the first field contains PRB grid offset information or SS block resource information, thereby resolving the ambiguity and managing processing complexity while maintaining the overhead reduction benefits
2Loss of time
If a first indication field in a PBCH of an SS block is used to indicate resource information of another SS block, then access delay is reduced, but terminal power consumption increases due to enhanced detection requirements
Solution Approach 1:
The resource information of the second SS block is pre-indicated in the first indication field of the first SS block's PBCH. This preliminary action allows the terminal device to obtain crucial resource information in advance, enabling it to directly access the second SS block without performing extensive blind detection, thereby reducing access delay while managing power consumption through efficient information retrieval
Solution Approach 2:
The second indication field provides feedback information that helps the terminal device determine the correct interpretation of the first indication field. This feedback mechanism enables the terminal to make informed decisions about resource allocation and detection strategies, optimizing the balance between access delay reduction and power consumption by avoiding unnecessary processing
Data Source
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AI summary
Embodiments of this application provide a wireless communication method and device, to lower bit overheads and reduce the complexity of terminal processing in the sending of a synchronization signal (SS) block. The method includes: determining that a first indication field in a physical broadcasting channel (PBCH) included in a first SS block is used to indicate a physical resource block (PRB) grid offset between channels or signals of an SS block and a non-SS block or indicate resource information of a second SS block; and sending the first SS block, where it is determined that the first indication field is used to indicate the resource information of the second SS block, the first indication field in the first SS block indicates the resource information of the second SS block.