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Traffic control method and device, CU (Centralized Unit) and DU (Distributed Unit)

A flow control and network element technology, applied in the field of communication, can solve problems such as no solution

Active Publication Date: 2018-07-06
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, in related technologies, it is proposed to divide network functions according to specific requirements, and network elements with different functional requirements are connected through forward interfaces. However, how to implement flow control between network elements with different functional requirements no related solutions

Method used

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  • Traffic control method and device, CU (Centralized Unit) and DU (Distributed Unit)
  • Traffic control method and device, CU (Centralized Unit) and DU (Distributed Unit)
  • Traffic control method and device, CU (Centralized Unit) and DU (Distributed Unit)

Examples

Experimental program
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Embodiment 1

[0065] The method embodiment provided in Embodiment 1 of the present application may be executed in a mobile terminal, a computer terminal, or a similar computing device. Take running on a mobile terminal that implements flow control as an example, figure 1 It is a hardware structural block diagram of a mobile terminal according to a flow control method in an embodiment of the present invention. Such as figure 1 As shown, the mobile terminal 10 may include one or more (only one is shown in the figure) processor 102 (the processor 102 may include but not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA, etc.), for A memory 104 for storing data, and a transmission device 106 for communication functions. Those of ordinary skill in the art can understand that, figure 1 The shown structure is only for illustration, and it does not limit the structure of the above-mentioned electronic device. For example, the mobile terminal 10 may ...

Embodiment 2

[0135] Figure 7 Schematic diagram of the flow control flow between the first network element and the second network element provided by the preferred embodiment of the present invention Figure II ,Such as Figure 7 shown. The first network element is CU, the second network element is DU, the interface between CU and DU is called NGx interface, NGx-C is the control plane of the fronthaul interface, and NGx-U is the user plane of the fronthaul interface.

[0136] Step 1: The CU sends a "data sending message" to the DU, and tells the DU the serial number information of the data packet sent by the current NGx-U, which can be the RLC SN number or a newly defined serial number, and the DU should remember the serial number of the data packet sent , which can be used for packet loss detection on the fronthaul interface. It may also include: a packet retransmission indication, which is used to indicate whether the data packet is a retransmission RLC PDU.

[0137] Step 2: The DU s...

Embodiment 3

[0147] Figure 8 Schematic diagram of the flow control flow between the first network element and the second network element provided by the preferred embodiment of the present invention Figure three ,Such as Figure 8 As shown, the first network element is CU, the second network element is DU, the interface between CU and DU is called NGx interface, NGx-C is the control plane of the fronthaul interface, and NGx-U is the user plane of the fronthaul interface.

[0148] Step 1: The CU sends a "data sending message" to the DU, telling the DU the serial number information of the data packet sent by the current NGx-U, which can be the PDCP SN number or a newly defined serial number, and the DU should remember the serial number of the data packet sent , which can be used for packet loss detection on the fronthaul interface.

[0149] Step 2: The DU can receive the flow control information on the CU side sent by the CU, including but not limited to one or more of the following info...

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Abstract

The invention provides a traffic control method and device, a CU (Centralized Unit) and a DU (Distributed Unit). The method comprises the steps of receiving a traffic control state message sent by a second network element connected with a first network element through a fronthaul interface, wherein the traffic control state message carries traffic control state information for identifying a traffic control state of the second network element, and different functions are divided for the first network element and the second network element; and performing traffic control processing according tothe traffic control state information. Through interaction of the traffic control state of the second network element, the traffic control processing between the first network element and the second network element which carry out communication through the fronthaul interface is realized, the problem of how to realize the traffic control between different network elements with different function requirements in related technologies is effectively solved, so the effect of ensuring the optimum throughput performance according to reasonable traffic control is achieved.

Description

technical field [0001] The present invention relates to the communication field, and in particular, to a flow control method and device, a centralized processing unit (Centralized Unit, CU for short), and a distributed processing unit (Distributed Unit, DU for short). Background technique [0002] In 5G mobile communications, massive connections and higher rate requirements for users require long-term evolution (Long Term Evolution, referred to as LTE) in the Base Band Unit (Base Band Unit, referred to as BBU), BBU and Radio Remote Unit The transmission capacity of the common public radio interface (Common Public Radio Interface, CPRI for short) between the fronthaul interface (referred to as RRU) poses a great challenge, because the CPRI interface transmits the in-phase quadrature ( In-Phase Quadrature, referred to as IQ) signal, the CPRI interface has relatively large requirements for transmission delay and bandwidth. If the 5G air interface rate increases to tens of Gbps...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/801H04L12/835H04L47/30
CPCH04L47/10H04L47/30H04W28/0231H04W76/27H04W88/085H04W28/10H04W76/12H04W80/02H04W80/08H04L47/26H04W92/12
Inventor 高音何青春黄河
Owner ZTE CORP