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Flow control method and device, CU and DU

A flow control and distributed processing technology, applied in the field of communications, can solve problems such as no solution, and achieve the effect of ensuring throughput performance and optimal throughput performance

Pending Publication Date: 2021-11-02
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 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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  • Flow control method and device, CU and DU
  • Flow control method and device, CU and DU
  • Flow control method and device, CU and DU

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] 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. like 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 als...

Embodiment 2

[0136] 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 ,like 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.

[0137] 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.

[0138] Step 2: The DU send...

Embodiment 3

[0148] 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 ,like 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.

[0149] 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 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.

[0150] 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 infor...

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Abstract

Provided in the present invention are a flow control method and device, a CU and a DU, the method comprising: receiving a flow control state message sent by a second network element connected with a first network element through a forward interface, the flow control state message carrying flow control state information for identifying the flow control state of the second network element, and the first network element and the second network element having different functions; and executing the flow control processing according to the flow control state information. The flow control processing between the first network element and the second network element which communicate through the forward interface is realized by interacting the flow control state of the second network element, so that the problem of how to realize the flow control between network elements with different function requirements in the related technology is effectively solved, therefore, the effect of ensuring the optimal throughput performance according to reasonable flow control is achieved.

Description

[0001] This application is a divisional application of the Chinese patent application with the application number "201611245343.X", the application date is "December 29, 2016", and the title is "fluidic control method, device, CU and DU". technical field [0002] 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 [0003] 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/02H04W76/27H04W76/12H04W28/10H04W80/02H04W80/08H04W88/08H04L12/835H04L12/825H04L12/801H04W92/12H04L47/30
CPCH04L47/10H04L47/30H04W28/0231H04W76/27H04W88/085H04W28/10H04W76/12H04W80/02H04W80/08H04L47/26H04W92/12
Inventor 高音何青春黄河
Owner ZTE CORP