Uplink Resource Allocation via Dynamic Cyclic Shift Sets
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G, face challenges in efficient uplink resource allocation and random access procedures, leading to increased intra-cell and inter-cell interference, higher access delays, and suboptimal user experience due to limitations in existing cyclic shift sets and resource allocation mechanisms.
Innovation Solution
The proposed solution involves a method for uplink resource allocation in 5G wireless communication systems, where a base station allocates Bandwidth Parts (BWP) and Physical Resource Blocks (PRBs) to User Equipment (UE), using a new cyclic shift set design for preamble sequences to reduce interference and improve access efficiency, and extends the transport block size (TBS) indication in random access responses to support machine-type communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If existing cyclic shift sets and resource allocation mechanisms are used, then system compatibility is maintained, but intra-cell and inter-cell interference increases
Solution Approach 1:
The patent introduces a new parameter 'cyclicShiftSetIndex' that allows dynamic selection between different cyclic shift sets (first set with smaller shifts, second set with larger shifts). This parameter change enables the system to adapt to different interference conditions while maintaining backward compatibility with existing systems.
Solution Approach 2:
The patent makes the cyclic shift selection dynamic by allowing the base station to indicate which cyclic shift set to use through downlink control information. This dynamic adaptation enables the system to respond to changing interference conditions in real-time, resolving the contradiction between maintaining compatibility and reducing interference.
2Loss of time
If traditional random access procedures are used, then protocol simplicity is maintained, but access delay increases
Solution Approach 1:
The patent performs preliminary actions by pre-configuring multiple cyclic shift sets and pre-establishing the mechanism for selecting between them. The base station prepares the first cyclic shift set for normal operations and the second cyclic shift set for high-interference scenarios, allowing rapid response without complex real-time calculations.
Solution Approach 2:
The patent introduces an intermediary mechanism through the 'cyclicShiftSetIndex' parameter carried in downlink control information or system information. This intermediary enables the base station to guide UE selection of appropriate cyclic shift sets without requiring complex direct negotiation or real-time analysis between base station and UE.
3Adaptability or versatility
If existing transport block size indication is used, then message format simplicity is maintained, but machine-type communication support is insufficient
Solution Approach 1:
The patent makes the random access response structure multi-functional by extending the transport block size indication field to serve both traditional uplink data scheduling and machine-type communication requirements. The same field structure supports diverse TBS values needed for different machine-type applications without requiring separate dedicated fields or protocols.
Data Source
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AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). An embodiment of the present disclosure provides a base station, a user equipment (UE), and a method for uplink resource allocation and a method for uplink transmission, which are applied in the field of communication technologies. The method includes that: a base station allocates Bandwidth Part (BWP) resources and intra-BWP Physical Resource Block (PRB) resources to a UE, and then transmits BWP resource indication information and intra-BWP PRB resource indication information to the UE. The BWP resource indication information is used for indicating the BWP resources allocated by the base station to the UE. The intra-BWP PRB resource indication information is used for indicating the intra-BWP PRB resources allocated by the base station, and then the UE receives the BWP resource indication information and the intra-BWP PRB resource indication information transmitted by the base station, and then determines the BWP resources and the intra-BWP PRB resources allocated by the base station according to the BWP resource indication information and the intra-BWP PRB resource indication information so as to perform uplink transmission.