System and Methods for Compress and Forward Relaying Schemes in Joint Signal Processing

A method implemented by a base station for compress and forward relaying in joint multi-cell processing (MCP), the method comprising:

• receiving a plurality of user signals from a plurality of user terminals, wherein the user signals are sent from the user terminals to a plurality of base stations including the base station;
• receiving an assigned quantization noise level from a network, wherein the assigned quantization noise level is one of a plurality of quantized noise levels determined for the base stations using an alternating convex optimization of a weighted sum-rate maximization function subject to a backhaul sum capacity constraint on backhaul links between the base stations and the network;
• quantizing a combination signal of the user signals according to the assigned quantization noise level;
• and
• relaying the quantized combination signal to the network.

A network component for supporting compress and forward relaying in joint multi-cell processing (MCP), the network component comprising:

• at least one processor;
• and
• a non-transitory computer readable storage medium storing programming for execution by the at least one processor, the programming including instructions to:
• establish a weighted sum-rate maximization function which allows optimization of quantization noise levels for a plurality of backhaul links from a plurality of radio nodes to the network component for joint MCP, wherein the weighted sum-rate maximization function is subject to a backhaul sum capacity constraint on the backhaul links;
• and
• determine the quantization noise levels using an alternating convex optimization of the weighted sum-rate maximization function.

A radio node for compress and forward relaying in joint multi-cell processing (MCP), the radio node comprising:

• at least one processor;
• and
• a non-transitory computer readable storage medium storing programming for execution by the at least one processor, the programming including instructions to:
• receive a plurality of user signals from a plurality of user terminals, wherein the user signals are sent from the user terminals to a plurality of base stations including the base station;
• receive an assigned quantization noise level from a network, wherein the assigned quantization noise level is one of a plurality of quantized noise levels determined for the base stations using an alternating convex optimization of a weighted sum-rate maximization function subject to a backhaul sum capacity constraint on backhaul links between the base stations and the network;
• quantize a combination signal of the user signals, according to the assigned quantization noise level, using Wyner-Ziv coding or a single user compression algorithm that excludes statistical correlations between the user signals at the base stations;
• and
• relay the quantized combination signal to the network.