US 11,895,535 B2Granted

Wireless backhaul system and communication method and apparatus

AssigneeHuawei Technologies Co., Ltd.

InventorsJing Liu, Mingzeng Dai, Yuanping Zhu, Yibin Zhuo

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Abstract

A wireless backhaul method, including: a wireless backhaul device generates a first F1AP message, maps the first F1AP message to a signaling-plane bearer of an LTE Uu interface, and sends the first F1AP message to a primary base station of the wireless backhaul device via the signaling-plane bearer of the LTE Uu interface. The primary base station obtains the first F1AP message via the signaling-plane bearer of the LTE Uu interface, encapsulates the first F1AP message into a first X2AP message, and sends the first X2AP message to a secondary base station of the wireless backhaul device. The secondary base station receives the first X2AP message and obtains the first F1AP message based on the first X2AP message.

Claims20

Dependent claims

A wireless backhaul system, comprising:

a wireless backhaul device, a secondary base station of the wireless backhaul device, and a primary base station of the wireless backhaul device, the wireless backhaul device comprises a mobile terminal (MT) function unit and a distributed unit (DU), and the secondary base station comprises a centralized unit (CU), wherein the wireless backhaul device is configured to:
generate a first F1AP message on the DU, and
send the first F1AP message to the MT function unit by using the DU;
and
map, on the MT function unit, the first F1AP message to a signaling-plane bearer of an LTE Uu interface, and
send the first F1AP message to the primary base station via the signaling-plane bearer of the LTE Uu interface;
the primary base station is configured to:
obtain the first F1AP message from the MT function unit via the signaling-plane bearer of the LTE Uu interface, and
encapsulate the first F1AP message into a first X2AP message;
or
obtain a first RRC message of a first standard via the signaling-plane bearer of the LTE Uu interface, wherein the first RRC message of the first standard comprises the first F1AP message, and
encapsulate the first RRC message of the first standard into a first X2AP message;
and
send the first X2AP message to the CU of the secondary base station,
encapsulate either the first RRC message of the first standard or the first F1AP message into a first RRC message of a second standard, and
map the first RRC message of the second standard to the signaling-plane bearer of the LTE Uu interface;
and the secondary base station is configured to:
receive, on the CU, the first X2AP message from the primary base station, and
obtain, on the CU, the first F1AP message based on the first X2AP message.

16 more elements

A communication method, applied to a wireless backhaul system comprising a wireless backhaul device and a primary base station of the wireless backhaul device, the wireless backhaul device comprises a mobile terminal (MT) function unit and a distributed unit (DU), and the method comprises:

generating, by the wireless backhaul device, a first F1AP message on the DU, and sending the first F1AP message to the MT function unit by using the DU;
and
mapping, by the wireless backhaul device on the MT function unit, the first F1AP message to a signaling-plane bearer of an LTE Uu interface;
sending the first F1AP message to the primary base station via the signaling-plane bearer of the LTE Uu interface;
encapsulating either a first RRC message of a first standard or the first F1AP message into a first RRC message of a second standard;
and
mapping the first RRC message of the second standard to the signaling-plane bearer of the LTE Uu interface.

4 more elements

A wireless backhaul device in a wireless backhaul system, the wireless backhaul system comprising the wireless backhaul device and a primary base station of the wireless backhaul device, the wireless backhaul device comprises a mobile terminal (MT) function unit and a distributed unit (DU), and the wireless backhaul device comprises:

at least one processor and at least one memory storing instructions;
wherein the instructions are executed by the at least one processor to cause the wireless backhaul device to perform the method of:
generating a first F1AP message on the DU;
and
sending the first F1AP message to the MT function unit by using the DU;
and
mapping, on the MT function unit, the first F1AP message to a signaling-plane bearer of an LTE Uu interface;
and
sending the first F1AP message to the primary base station via the signaling-plane bearer of the LTE Uu interface;
encapsulating either a first RRC message of a first standard or the first F1AP message into a first RRC message of a second standard;
and
mapping the first RRC message of the second standard to the signaling-plane bearer of the LTE Uu interface.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/398,183Filed 10 Aug 2021 · continuation
Priority: CN 201910118153.915 Feb 2019
Published: US 2021/0377802 A12 Dec 2021
Granted: 6 Feb 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

H04W 28/0862
Between base stations: of same hierarchy level
H04W 76/12
Connection setup: setup of transport tunnels
H04W 28/16
Network traffic management; Network resource management: central resource management; Negotiation of resources or communication parameters, e.g.…
H04W 80/02
Wireless network protocols or protocol adaptations to wireless operation: data link layer protocols