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Method for slot format for backhaul and access link in wireless communication system and terminal using same method

專利號
US11350410B2
公開日期
2022-05-31
申請人
LG Electronics Inc.（KR Seoul）
發(fā)明人
Hyangsun You; Yunjung Yi; Huayue Song
IPC分類
H04W72/04; H04W72/12; H04W84/04
技術(shù)領(lǐng)域
backhaul,node,link,dgnb,slot,in,access,ue,rn,iab
地域： Seoul

摘要

The present disclosure provides a method for data transmission or reception performed by a first node in a wireless communication system, the method including: performing a first data transmission or reception to or from a UE on an access link on the basis of a first timing case in an access time duration; and performing a second data transmission or reception to or from a second node or a donor base station on a backhaul link on the basis of a second timing case in a backhaul time duration, wherein downlink transmission timings over the donor base station, the first node, the second node and the UE are aligned in the first timing case, and downlink and uplink transmission timings or downlink and uplink reception timings are aligned in the first node in the second timing case.

說明書

Option C can be considered in order to eliminate timing dependency between links. In this option, a link for the gNB function and a link for the UE function can be TDMed in view of a node.

A node has two functions of the gNB function and the UE function. The gNB function supports and communicates with UEs and child nodes and the UE function connects to and communicates with a parent node. Accordingly, a backhaul link with a parent node is related to the UE function and a backhaul link with a child node and an access link is related to the gNB function.

FIG. 32 schematically illustrates an example of IAB scheduling according to option C.

TDM of the gNB function and the UE function may mean TDM of an even-numbered hop and an odd-numbered hop, and scheduling of this option can be composed of four steps which are illustrated in FIG. 32.

(1) Step 1: DL of access/backhaul links for an odd-numbered hop

(2) Step 2: UL of access/backhaul links for an odd-numbered hop

(3) Step 3: DL of access/backhaul links for an even-numbered hop (DL of an access link of +DgNB)

(4) Step 4: UL of access/backhaul links for an even-numbered hop (DL of an access link of +DgNB)

The main purpose of this option is to generate an independent Tx/Rx timing between links.

In view of a DgNB, the DgNB has no backhaul link with a parent node. Accordingly, the DgNB may not pay attention to a backhaul link timing for a time duration for the UE function, and thus the access link of the DgNB can be used.

FIG. 33 schematically illustrates another example of IAB scheduling according to option C.

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