Method for multiplexing multi-RRU common cell resources in 5G network

Abstract

The invention discloses a method for multiplexing multi-RRU common cell resources in a 5G network, which comprises the following steps that a BBU / host configures an independent reference signal resource for an RRU / extension unit, and the reference signal resource is configured with a unique identifier, specific sending time and a frequency domain position; the RRU / expansion unit sends the reference signal according to the sending time and the frequency domain position configured by the reference signal resource; when the UE accesses the cell, the base station configures signaling information for the UE, and the UE measures the reference signal sent by the RRU / expansion unit and uploads the measured reference signal strength and reference signal resource identifier or uploads the referencesignal resource identifier with the strongest signal strength to the base station; the base station acquires a reference signal identifier with the strongest signal strength according to the information reported by the UE, determines the position of an RRU / extension unit coverage area where the UE is located, and constructs a connection relationship topological graph of the UE and the RRU / extension unit; and according to the cell load state, the base station multiplexes channel resources among the UEs under different RRU / extension unit coverage areas to serve the UEs. According to the invention, the network capacity can be multiplied, the network interference is reduced, the energy efficiency is improved, and the cost is reduced.

Description

technical field [0001] The present invention relates to the technical field of 5G wireless communication, and in particular to a method for multiplexing resources of multiple RRUs in a 5G network shared cell. Background technique [0002] For decades since the birth of the wireless communication industry, the "coverage" and "capacity" of the wireless communication network have always been two core themes. The invention of the cellular network has solved these two problems well. The cellular network divides a geographical area into several small areas, and then installs a base station with moderate transmission power in each small area to achieve wireless signal coverage in the target area—this small area covered by the wireless signal of the base station can provide wireless communication services Areas are called "cells". [0003] Macro base stations will configure multiple RRUs as one cell in some special scenarios, such as high-speed rail / subway and dense urban areas wit...

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Problems solved by technology

[0005] 1) The equipment resource overhead is large: because the processing and calculation of the baseband signal is very large, creating an L1 cell for each RRU consumes a lot of equipment resources and the deployment cost is high;

[0006] 2) Extended Pi station is not applicable: This solution is usually applied in macro base station scenarios

There are a large number of RF units in the extended skin station scenario, the equipment cost of creating an L1 cell for each RF unit, and the transmission cost between the host and the RF unit are very high;

[0007] 3) SRS resource overhead is large: Since the base station and UEs are "one-to-many" communication, in order to avoid SRS signal conflicts between different UEs, each UE in the cell needs to allocate independent SRS resources, so this scheme channel The resource overhead is large, and the base station is required to support higher SRS channel demodulation specifications, which increases the cost of the base station

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