Dynamic Uplink Control Channel Gating for Wireless Capacity
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Solution Overview
Problem
In wireless communications, the continuous transmission of uplink control channels leads to significant overhead, especially during periods of inactivity in bursty packet services, which can be addressed by implementing dynamic gating to optimize control channel transmission.
Innovation Solution
The method involves scheduling a discontinuous uplink dedicated physical control channel (DPCCH) based on predefined rules or instructions from the network, adjusting the gating period and duration according to transmission inactivity, and using channel quality indicator reporting information to optimize control channel transmission patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous transmission of uplink control channel is used, then control signaling reliability is maintained, but control overhead increases significantly
Solution Approach 1:
The patent implements discontinuous transmission of the uplink control channel by periodically gating the DPCCH based on data activity detection. Instead of continuous transmission, the control channel is transmitted only during periods when data transmission occurs or according to periodic gating patterns, thereby reducing control overhead while maintaining reliability through periodic presence.
Solution Approach 2:
The patent introduces dynamic gating control where the DPCCH transmission is adaptively adjusted based on data activity. The gating mechanism dynamically switches between continuous and discontinuous transmission modes according to the presence or absence of data on the E-DCH, making the control channel transmission flexible and adaptive to traffic conditions.
2Measurement precision
If continuous transmission of uplink control channel is used, then channel estimation accuracy is maintained, but user equipment power consumption increases
Solution Approach 1:
The patent applies periodic gating to the DPCCH transmission, where the control channel is transmitted in periodic intervals rather than continuously. This periodic transmission reduces the time duration of transmission activities, thereby reducing power consumption while maintaining channel estimation accuracy through periodic updates at intervals sufficient for maintaining synchronization and channel knowledge.
Solution Approach 2:
The patent extracts and removes the DPCCH transmission during periods when data is not being transmitted. By taking out the control channel transmission during idle periods and only transmitting it when necessary (during data activity or according to periodic gating), the patent reduces power consumption while preserving channel estimation capabilities when needed.
3Stability of the object's composition
If continuous transmission of uplink control channel is used, then synchronization is maintained, but uplink capacity is reduced due to overhead
Solution Approach 1:
The patent implements periodic gating of the DPCCH transmission to maintain synchronization stability. By transmitting the control channel periodically rather than continuously, the patent maintains sufficient synchronization information at the network side while reducing the overall overhead, thereby increasing available uplink capacity for data transmission.
Solution Approach 2:
The patent changes the transmission parameter of the DPCCH from continuous to discontinuous based on data activity conditions. This parameter change allows the system to adjust the transmission pattern dynamically, maintaining synchronization through periodic presence while reducing the time and resources consumed by control signaling, thus increasing uplink capacity.
4Quantity of substance
If discontinuous transmission of control channel is implemented, then control overhead is reduced, but detection complexity increases
Solution Approach 1:
The patent applies preliminary action by having the UE notify the network in advance when data transmission is about to occur or has occurred. This preliminary notification allows the network to prepare for and expect the DPCCH transmission, simplifying detection by providing contextual information about when control channel transmissions will occur, thereby reducing detection complexity despite discontinuous transmission.
Data Source
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AI summary
The specification and drawings present a new method, system, apparatus and software product for dynamic gating of an uplink (UL) control channel, e.g., dedicated physical control channel (DPCCH) for increasing capacity of communications, e.g., wireless communications, wherein said gating is defined, using a predetermined criterion, by instructions provided by a network and by a transmission gap in a discontinuous data signal, e.g., transmitted on an enhanced dedicated channel (E-DCH).