SBFD Downlink Resource Mapping Around Unavailable Frequency Bands
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Solution Overview
Problem
Existing communication systems face challenges in efficiently mapping resources for downlink transmission and reception, particularly in subband full duplex (SBFD) scenarios, leading to inefficiencies and potential resource wastage due to improper allocation.
Innovation Solution
A resource determination method and apparatus that involves receiving and sending specific information to indicate unavailable frequency domains and allocated resources, enabling accurate mapping of resources for downlink transmission and reception in SBFD time units, using non-interleaved or interleaved mapping modes as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If resources are allocated in SBFD time units without considering unavailable frequency domains, then resource allocation can be simplified, but resource wastage occurs due to improper allocation
Solution Approach 1:
The frequency domain is segmented into available and unavailable subbands. The network device indicates unavailable frequency domains through first information, allowing the terminal to segment its resource selection process. This segmentation enables simplified allocation within available resources while avoiding wastage in unavailable domains, resolving the contradiction between allocation simplicity and resource efficiency.
Solution Approach 2:
The network device performs preliminary action by indicating unavailable frequency domains before the terminal allocates resources. The first information about unavailable domains is provided in advance, enabling the terminal to pre-filter its resource selection and map allocated resources only to available subbands, thus avoiding resource wastage while maintaining allocation simplicity.
2Speed
If resource mapping is performed without accurate information about unavailable frequency domains, then the mapping process is faster, but resource allocation accuracy deteriorates
Solution Approach 1:
The network device provides first information about unavailable frequency domains as preliminary information before resource mapping. This allows the terminal to perform accurate resource mapping by pre-knowing which subbands to avoid, achieving both speed (through efficient mapping processes) and accuracy (through informed resource selection).
Solution Approach 2:
The first information about unavailable frequency domains acts as an intermediary that mediates between the resource allocation request and the actual resource mapping. This intermediary information enables the terminal to accurately identify available subbands and map resources appropriately, maintaining both mapping speed and allocation accuracy.
3Productivity
If all allocated resources are used for downlink transmission, then downlink efficiency is improved, but uplink transmission capability is reduced due to subband full duplex constraints
Solution Approach 1:
Different frequency subbands are assigned different qualities/functions. Some subbands are designated as unavailable for downlink (reserved for uplink in SBFD operation), while others are available. This local differentiation allows the system to maximize downlink efficiency in available subbands while preserving uplink capability in reserved subbands, resolving the contradiction between downlink productivity and uplink adaptability.
Solution Approach 2:
The frequency domain is segmented into downlink-available and uplink-reserved subbands. This segmentation enables the system to simultaneously support downlink transmission in available subbands and uplink transmission in unavailable subbands, achieving both high downlink efficiency and maintained uplink capability under SBFD constraints.
Data Source
Figure 1~2a
Figure 2b~2c
Figure 2d
AI summary
The present disclosure provides a resource determination method and apparatus, and a device and a storage medium. The method comprises: receiving first information and second information sent by a network device, wherein the first information is used for indicating a frequency domain range which cannot be used for downlink transmission and/or reception, and the second information is used for indicating a first resource allocated by the network device to a terminal; and on the basis of the first information and the second information, determining in a subband full duplex (SBFD) time unit a second resource used for downlink transmission and/or reception. Thus, during PDSCH transmission and/or reception, VRBs may be all mapped to PRBs used for downlink transmission and/or reception, thereby improving the resource utilization efficiency.