Pilot Pattern Control Signaling in Dedicated Mobile Channels
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Solution Overview
Problem
In mobile communication systems, existing methods for transmitting control information, such as ACK/NACK, often require additional resources or cause data loss, especially when using separate channels or code multiplexing, which can lead to performance deterioration and inefficient channel usage.
Innovation Solution
The method involves modulating the pattern and phase of a pilot field in a dedicated physical channel to transmit control information without requiring a separate overhead channel, using orthogonal and sign-inverted pilot patterns to encode control information within the existing pilot field, allowing for efficient transmission and reception of control information without additional channel allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control information is transmitted using a separate physical channel, then control information can be reliably transmitted, but channel resources are consumed and channel efficiency deteriorates
Solution Approach 1:
The patent combines control information transmission with the existing dedicated physical channel by modulating the pilot field. Instead of using a separate channel for control information, the invention merges both data and control information into the same channel structure, specifically utilizing the pilot field of the dedicated physical channel to carry control information through pattern selection and phase modulation.
Solution Approach 2:
The pilot field of the dedicated physical channel is given multiple functions: it serves both as a reference signal for channel estimation and as a carrier for control information. By enabling the pilot field to simultaneously perform channel estimation and control information transmission, the invention eliminates the need for separate control channels while maintaining reliable control information delivery.
2Productivity
If control information is transmitted using code multiplexing, then control information can be transmitted without additional channels, but data loss occurs and performance deteriorates
Solution Approach 1:
The patent segments the pilot field into multiple orthogonal patterns that can represent different control information states. By dividing the pilot field into distinct orthogonal patterns (e.g., different phases or sequences), the invention enables control information encoding without interfering with the underlying data transmission, thus avoiding data loss while maintaining channel efficiency.
3Ease of operation
If additional overhead channels are allocated for control information, then control information transmission is simplified, but resource consumption increases and channel efficiency decreases
Solution Approach 1:
The dedicated physical channel serves itself by incorporating control information transmission capabilities within its existing structure. The pilot field, which is already part of the dedicated physical channel, is utilized to carry control information through pattern modulation, enabling the channel to handle both data and control functions without requiring external overhead channels or additional resource allocation.
Data Source
AI summary
An apparatus and method for transmitting/receiving control information using a pilot pattern inserted in a plot field of a dedicated physical channel in a mobile communication system including a transmitter for transmitting data and a receiver for receiving the data. The apparatus and method include selecting control information according to whether the data is received; and selecting a pilot pattern according to the control information, and inserting the selected pilot pattern in a pilot field of a dedicated physical channel as the control information, before transmission. The pilot pattern includes a first pilot pattern used when the control information is not transmitted, a second pilot pattern being orthogonal with the first pilot pattern, and a third pilot pattern generated by inverting a sign of the second pilot pattern.