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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(hào)
US11350410B2
公開(kāi)日期
2022-05-31
申請(qǐng)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,ue,access,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(shuō)明書(shū)

A specific example of a timing relationship between links is illustrated in FIG. 33. An RN cannot simultaneously connect Tx/Rx backhaul links to a parent node and a child node so that the two links have no reason to be correlated. Accordingly, all nodes can have the same DL Tx timing and UL Rx timing, which may cause a simple scheduling/coordination structure.

In this option, nodes may have the same slot boundaries (or boundaries of multiple slots). However, access link timings may be different for nodes and thus SSB transmission timings may also be different.

In this case, SSB can be transmitted in slots with different slot numbers between nodes although SFN start points are identical for the nodes. Alternatively, SFN start points may be different for the nodes although SSB is transmitted in slots with the same slot number between the nodes.

That is, in FIG. 33, DgNB(a) and RN(c) transmit SSB in slot #0 whereas RN(b) and RN(d) transmit SSB in slot #1, for example. Although all nodes transmit SSB in slot #0, for example, RN(b) and RN(d) may transmit a slot #(n+1) when a slot #n is transmitted for DgNB(a) and RN(c).

As in option B, the access link timing does not change even when a backhaul link route between a DgNB and an RN changes. Further, a CLI issue with respect to UEs does not occur.

In this section, three options for scheduling between links in an IAB environment have been provided.

Option (a) provides flexibility of resource utilization but has disadvantages of some restrictions and a complicated structure. On the other hand, options (b) and (c) can solve the disadvantages of option (a) but has low resource utilization flexibility.

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