Sequence Group Offset for Distributed Antenna Interference
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Solution Overview
Problem
In distributed antenna systems, strong interference occurs between user equipments controlled by different transceiver nodes due to the use of the same sequence group, which affects channel estimation accuracy and transmission efficiency.
Innovation Solution
A method where user equipment receives a sequence group offset value from a base station to adjust its sequence group number, allowing user equipments controlled by different transceiver nodes to use different sequence groups, thereby reducing interference and improving transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If all user equipments in a distributed antenna system use the same sequence group at the same time point, then channel estimation can be performed conveniently, but strong interference occurs between user equipments covered by different transceiver nodes
Solution Approach 1:
The patent segments the sequence groups by assigning different sequence groups to different user equipments based on their associated transceiver nodes. Each user equipment is configured with a sequence group offset value that determines which sequence group it uses, thereby dividing the uniform sequence group into multiple distinct sequence groups to reduce interference while maintaining channel estimation capability.
Solution Approach 2:
The patent applies local quality by assigning sequence group offset values specific to each user equipment or transceiver node configuration. Different user equipments in the same cell but associated with different transceiver nodes use different sequence groups, creating localized differentiation that reduces interference without affecting the overall system operation.
2Object-generated harmful factors
If neighboring cells use sequences in different groups, then mutual interference is reduced, but in distributed antenna systems all UEs in the same cell must use different sequence groups which increases system complexity
Solution Approach 1:
The patent makes the sequence group offset value a universal configuration parameter that serves multiple purposes: it determines the sequence group for interference reduction, identifies the transceiver node association, and can be configured through existing base station signaling mechanisms. This multi-functionality reduces the need for separate configuration mechanisms.
Solution Approach 2:
The patent changes the sequence group selection parameter by introducing sequence group offset values that are added to the base sequence group number. This parameter change allows dynamic sequence group assignment based on user equipment configuration while maintaining a simple and systematic approach to sequence group management.
3Object-generated harmful factors
If sequence group offset values are configured for each user equipment, then interference is reduced, but system signaling overhead increases
Solution Approach 1:
The patent implements self-service by enabling user equipments to determine their own sequence group based on configuration information received from the base station. The sequence group offset values can be configured through existing signaling mechanisms and stored in the user equipment, allowing the system to reduce interference without requiring continuous signaling or complex centralized coordination.
Solution Approach 2:
The patent applies partial action by configuring sequence group offset values only for user equipments that need interference reduction, rather than universally applying the same configuration to all user equipments. This allows the system to reduce interference where necessary while minimizing the signaling overhead for user equipments that do not require sequence group differentiation.
Data Source
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AI summary
The present invention discloses an information transmission method, a user equipment and a base station. The method includes: receiving indication signaling that is sent by a base station and includes a sequence group offset value, where the sequence group offset value is used to adjust a sequence group number of a sequence group used by a user equipment for sending a sequence modulated signal; and determining the sequence group number according to the sequence group offset value. The method further includes: determining a sequence group offset value, where the sequence group offset value is used to adjust a sequence group number of a sequence group used by a user equipment for sending a sequence modulated signal; and sending indication signaling to the user equipment, where the indication signaling includes the sequence group offset value. In the information transmission method, the user equipment, and the base station in embodiments of the present invention, the sequence group number of the sequence group used by the user equipment for sending the sequence modulated signal is adjusted. Therefore, user equipments controlled by different transceiver nodes use different sequence groups, thereby reducing interference between the user equipments controlled by different transceiver nodes, and improving transmission efficiency.