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Low time delay device and method for 5G forward transmission

A low-latency, 5G technology, applied in the field of low-latency devices for 5G fronthaul, can solve the problems of increasing the overall delay of the 5G fronthaul network, and achieve the effects of avoiding occupation, reducing complexity and cost, and improving system efficiency

Active Publication Date: 2019-09-10
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this process, the round-trip time (Round-Trip Time, RTT) brought about by the reporting and issuing of Report and Grant commands produces a large delay, especially in long-distance PON networks, which may introduce millisecond-level delays. Propagation delay, which greatly increases the overall delay in the 5G fronthaul network

Method used

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  • Low time delay device and method for 5G forward transmission
  • Low time delay device and method for 5G forward transmission
  • Low time delay device and method for 5G forward transmission

Examples

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Embodiment

[0030] figure 1 It is a structure diagram of a specific embodiment of a 5G fronthaul low-latency device of the present invention.

[0031] In this example, if figure 1 As shown, a low-latency device for 5G fronthaul in the present invention mainly includes: a central AAU, each sub-AAU, each ONU, and an OLT.

[0032] In a long-distance time-division multiplexing passive optical network, there is a 100km single-mode fiber between the ONU end and the OLT end, and the DU resource pool is deployed at the OLT end. Splitter and ONU respectively 1 、ONU 2 and ONU 3 connection, AAU1-7 Deployed on the ONU side, AAU 1 、AAU 4 belongs to ONU 1 , AAU 2 、AAU 5 and AAU 6 belongs to ONU 2 , AAU 3 、AAU 7 belongs to ONU 3 .

[0033] In the 5G fronthaul network with mixed access of optical fiber and wireless, AAU 1-3 Deployed at the corresponding ONU as a first-level AAU and directly connected to the ONU, the AAU 4-7 As a secondary AAU, it is linked with the corresponding primary ...

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Abstract

The invention discloses a low time delay device and method for 5G forward transmission. The method comprises the following steps: firstly, obtaining an uplink transmission demand of each ONU (OpticalNetwork Unit), performing local dynamic bandwidth distribution, then generating Grant information from a bandwidth distribution result, distributing the Grant information to each ONU, and performing uplink data transmission by each ONU according to the bandwidth distribution result so as to avoid conflicts.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication, and more specifically, relates to a low-delay device and method for 5G fronthaul. Background technique [0002] In 5G communications, the RAN network will evolve from the BBU and RRU two-level architecture of 4G and LTE networks to the three-level architecture of CU, DU, and AAU. The non-real-time processing part in the original BBU was separated and redefined as a centralized unit (CentralizedUnit, CU). The underlying physical layer function in the original BBU was integrated with the original RRU into an active antenna processing unit (Active AntennaUnit, AAU), and The remaining functions of the original BBU are redefined as Distribute Unit (DU), which is responsible for processing high-level physical layer protocols and real-time services. Therefore, the 5G bearer network will be divided into the fronthaul network (Fronthaul) working between AAU and DU, the middlehaul netw...

Claims

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Application Information

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IPC IPC(8): H04B10/2575H04Q11/00H04L29/06
CPCH04B10/25753H04L69/22H04Q11/0062H04Q2011/0086
Inventor 张崇富钟晓宇黄欢邱昆
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA