BTS Baseband Sample Compression Across OBSAI and CPRI Links
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Solution Overview
Problem
Current transceiver systems in wireless communication networks face challenges in managing increasing data volumes and evolving standards, leading to the need for costly hardware upgrades, particularly in terms of serial data link capacity and resource conservation, without compliance with existing standards like OBSAI and CPRI which do not support signal sample compression.
Innovation Solution
The method involves compressing signal samples at the RF or baseband processor units before transfer over serial data links, formatting them for compatibility with existing protocols, and decompressing them at the receiving end to maintain signal processing integrity, using compressors and decompressors integrated into the system architecture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal samples are transferred uncompressed over serial data links, then signal processing quality is maintained, but data transfer capacity is insufficient and hardware upgrades are required
Solution Approach 1:
The patent applies compression parameters to reduce the bit width of signal samples from their original precision (e.g., 16 bits) to a compressed format (e.g., 8 bits or variable length). This parameter change enables more samples to be transferred over the same serial data link capacity, directly resolving the contradiction between maintaining signal quality and increasing data transfer capacity. The compression is reversible through decompression at the receiving end.
2Productivity
If serial data link capacity is increased to handle growing data volumes, then data transfer capacity improves, but system cost and complexity increase
Solution Approach 1:
Instead of increasing the physical capacity of serial data links (which would require more expensive hardware), the patent changes the data representation parameters by compressing signal samples. This allows the existing hardware infrastructure to handle larger data volumes without upgrade, avoiding increased system cost and complexity while still achieving the desired productivity improvement.
3Productivity
If more computing resources are allocated to handle increasing data processing requirements, then signal processing capability improves, but resource conservation is compromised
Solution Approach 1:
The patent reduces the quantity of computing resources required by compressing signal samples before transfer. This parameter change in data representation decreases the total data volume that needs to be processed, transmitted, and stored, thereby conserving computing resources while maintaining the ability to handle growing data processing requirements through more efficient resource utilization.
Data Source
AI summary
A signal compression method and apparatus for a base transceiver system (BTS) in a wireless communication network provides efficient transfer of compressed signal samples over serial data links in the system. For the uplink, an RF unit of the BTS compresses baseband signal samples resulting from analog to digital conversion of a received analog signal followed by digital downconversion. The compressed signal samples are transferred over the serial data link to the baseband processor then decompressed prior to normal signal processing. For the downlink, the baseband processor compresses baseband signal samples and transfers the compressed signal samples to the RF unit. The RF unit decompresses the compressed samples prior to digital upconversion and digital to analog conversion to form an analog signal for transmission over an antenna. Compression and decompression can be incorporated into operations of conventional base stations and distributed antenna systems, including OBSAI or CPRI compliant systems.