TW202329741A - Method and user equipment for rach procedure - Google Patents

Method and user equipment for rach procedure Download PDF

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TW202329741A
TW202329741A TW111148484A TW111148484A TW202329741A TW 202329741 A TW202329741 A TW 202329741A TW 111148484 A TW111148484 A TW 111148484A TW 111148484 A TW111148484 A TW 111148484A TW 202329741 A TW202329741 A TW 202329741A
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random access
access channel
candidate cell
procedure
command
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TW111148484A
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蔡承融
陳薏如
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聯發科技股份有限公司
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/002Transmission of channel access control information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0833Random access procedures, e.g. with 4-step access

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A method for random access channel (RACH) procedure is proposed. The network node allocates a transmission configuration indicator (TCI) state associated with the RACH procedure for a user equipment (UE) and transmits a command triggering the RACH procedure for a candidate cell to the UE. The UE determines the RACH resource configured to the candidate cell based on the TCI state associated with the candidate cell. Then, the UE transmits a message on the RACH resource to the network node.

Description

隨機存取通道過程的方法和使用者設備Method and user equipment for random access channel procedure

本發明的實施方式一般涉及無線通訊系統,並且,更具體地,係有關於具有傳輸配置指示符(transmission configuration indicator,TCI)的狀態啟動(activation)/指示的隨機存取通道(random access channel,RACH)過程。Embodiments of the present invention relate generally to wireless communication systems, and, more particularly, to random access channels with state activation/indication of a transmission configuration indicator (TCI). RACH) process.

多年來,無線通訊網路呈指數增長。長期演進(Long-Term Evolution,LTE)系統提供了簡單網路架構帶來的高峰值資料速率、低延遲、改進的系統容量以及低運行成本。LTE系統,又稱第四代(4th Generation,4G)系統,亦提供了與較舊網路的無縫集成,例如全球行動通訊系統(Global System For Mobile Communications,GSM)、分碼多重存取(Code Division Multiple Access,CDMA)和通用行動電訊系統(Universal Mobile Telecommunications System,UMTS)。在LTE系統中,演進通用地面無線存取網路(evolved universal terrestrial radio access network,E-UTRAN)包括與複數個稱為使用者設備(user equipment,UE)的行動站通訊的複數個演進節點B(evolved Node-B,eNodeB或eNB)。第三代合作夥伴計畫(3 rdgeneration partner project,3GPP)網路通常包括第二代(2nd Generation,2G)/第三代(3rd Generation,3G)/4G系統的混合。下一代行動網路(Next Generation Mobile Network,NGMN)董事會已經決定將未來NGMN活動的重點放在定義第五代(5th Generation,5G)新無線電(new radio,NR)系統的端到端需求上。 Wireless communication networks have grown exponentially over the years. Long-Term Evolution (LTE) systems offer high peak data rates, low latency, improved system capacity, and low operating costs brought about by a simple network architecture. The LTE system, also known as the 4th Generation (4G) system, also provides seamless integration with older networks, such as Global System For Mobile Communications (GSM), Code Division Multiple Access ( Code Division Multiple Access, CDMA) and Universal Mobile Telecommunications System (UMTS). In the LTE system, the evolved universal terrestrial radio access network (evolved universal terrestrial radio access network, E-UTRAN) includes a plurality of evolved node Bs communicating with a plurality of mobile stations called user equipment (UE). (evolved Node-B, eNodeB or eNB). A 3rd generation partner project (3GPP) network typically includes a mix of 2nd Generation (2G)/3rd Generation (3G)/4G systems. The Next Generation Mobile Network (NGMN) Board of Directors has decided to focus future NGMN activities on defining the end-to-end requirements for 5th Generation (5G) new radio (NR) systems.

在傳統5G技術中,在UE透過無線電資源控制(radio resource control,RRC)信令觸發小區改變或切換過程之後,將只執行下行鏈路同步(downlink synchronization,DL sync)操作和上行鏈路(uplink,UL)同步操作(例如,RACH過程)。然而,在當前RACH過程中,沒有與RACH過程相關聯的TCI狀態。UE可能沒有足夠的資訊來執行RACH過程。此外,在當前RACH過程中,需要基於兩個單獨的過程來操作DL同步操作和UL同步操作。In traditional 5G technology, after the UE triggers the cell change or handover process through radio resource control (radio resource control, RRC) signaling, only downlink synchronization (DL sync) operations and uplink (uplink synchronization) operations will be performed. , UL) synchronous operation (for example, RACH procedure). However, in the current RACH procedure, there is no TCI status associated with the RACH procedure. UE may not have enough information to perform RACH procedure. Furthermore, in the current RACH procedure, DL synchronization operation and UL synchronization operation need to be operated based on two separate procedures.

因此,尋求解決方案。So, seek a solution.

提出了一種用於RACH過程的方法。網路節點為UE分配與RACH過程相關聯的TCI狀態,並向UE發送觸發候選小區的RACH過程的命令。UE可以基於與候選小區相關聯的TCI狀態來確定配置給候選小區的RACH資源。此外,UE可以在RACH資源上向網路節點發送消息。當命令指示觸發與TCI相關聯的RACH過程用於小區改變或切換時,UE可以基於TCI狀態觸發小區改變或切換。因此,在本發明中,TCI狀態可以與RACH過程相關聯,並且DL同步操作和UL同步操作可以組合在同一過程中。A method for RACH procedure is proposed. The network node assigns the TCI state associated with the RACH procedure to the UE, and sends a command to the UE to trigger the RACH procedure of the candidate cell. The UE may determine the RACH resources configured for the candidate cell based on the TCI state associated with the candidate cell. In addition, the UE can send a message to the network node on the RACH resource. When the command indicates to trigger the RACH procedure associated with the TCI for cell change or handover, the UE may trigger the cell change or handover based on the TCI status. Therefore, in the present invention, TCI status can be associated with RACH procedure, and DL synchronization operation and UL synchronization operation can be combined in the same procedure.

在一個實施例中,UE可以從網路節點接收命令,所述命令觸發候選小區的RACH過程。UE可以基於與候選小區相關聯的TCI狀態來確定配置給候選小區的RACH資源。此外,UE可以在RACH資源上向網路節點發送消息。In one embodiment, the UE may receive an order from the network node, the order triggering the RACH procedure of the candidate cell. The UE may determine the RACH resources configured for the candidate cell based on the TCI state associated with the candidate cell. In addition, the UE can send a message to the network node on the RACH resource.

在一個實施例中,UE還基於TCI狀態監測RACH過程的隨機存取響應(random access response,RAR)。此外,當命令指示觸發RACH過程用於小區改變或切換時,UE可以進一步基於TCI狀態觸發小區改變或切換。In one embodiment, the UE also monitors a random access response (random access response, RAR) of the RACH procedure based on the TCI state. In addition, when the command indicates to trigger the RACH procedure for cell change or handover, the UE may further trigger the cell change or handover based on the TCI state.

本發明提出的具有TCI狀態指示的RACH過程可以結合DL同步操作和UL同步操作在同一過程中,加速小區改變或切換的速度。The RACH process with TCI state indication proposed by the present invention can combine DL synchronization operation and UL synchronization operation in the same process, and accelerate the speed of cell change or switching.

下面的詳細描述中描述了其他實施方式和優點。所述發明內容並非旨在定義本發明。本發明由發明申請專利範圍限定。Other embodiments and advantages are described in the detailed description below. This summary is not intended to define the invention. The present invention is limited by the patent scope of the invention application.

現在將詳細參考本發明的一些實施方式,其示例見附圖。Reference will now be made in detail to some embodiments of the invention, examples of which are illustrated in the accompanying drawings.

第1圖描述了根據本發明各方面的示例性5G NR網路100。5G NR網路100包括網路節點101,網路節點101通訊地連接到在存取網路110的許可頻帶(例如,對於毫米波,30GHz~300GHz)中操作的UE 102,存取網路110使用無線電存取技術(RAT)(例如,5G NR技術)提供無線電存取。存取網路110透過NG介面連接到5G核心網路120,更具體地,透過NG使用者平面部分(NG user-plane part,NG-u)連接到使用者平面功能(User Plane Function,UPF),並且透過NG控制平面部分(NG control-plane part,NG-c)連接到行動性管理功能(Mobility Management Function,AMF)。出於負載共用和冗餘的目的,一個gNB可以連接到複數個UPF/AMF。網路節點101可以是基地台(base station,BS)或gNB。UE 102可以是智慧型電話、可穿戴設備、物聯網(Internet of Things,IoT)設備和平板電腦等。可選地,UE 102可為插入或安裝有資料卡的筆記本電腦(Notebook,NB)或個人電腦(Personal Computer,PC),其中資料卡包括數據機(modem)和RF收發器以提供無線通訊的功能。Figure 1 depicts an exemplary 5G NR network 100 in accordance with aspects of the present invention. The 5G NR network 100 includes a network node 101 communicatively connected to a licensed frequency band in an access network 110 (e.g., For UE 102 operating in mmWave, 30GHz~300GHz), the access network 110 provides radio access using radio access technology (RAT) (eg, 5G NR technology). The access network 110 is connected to the 5G core network 120 through the NG interface, more specifically, connected to the user plane function (UPF) through the NG user-plane part (NG user-plane part, NG-u) , and connect to the Mobility Management Function (AMF) through the NG control-plane part (NG-c). One gNB can be connected to multiple UPFs/AMFs for load sharing and redundancy purposes. The network node 101 may be a base station (base station, BS) or a gNB. The UE 102 may be a smart phone, a wearable device, an Internet of Things (Internet of Things, IoT) device, a tablet computer, and the like. Optionally, UE 102 may be a notebook computer (Notebook, NB) or a personal computer (Personal Computer, PC) inserted or installed with a data card, wherein the data card includes a modem (modem) and an RF transceiver to provide wireless communication Function.

網路節點101可以為地理覆蓋區域提供通訊覆蓋,其中透過通訊鏈路103支援與UE 102的通訊。網路節點101和UE 102之間的通訊鏈路103可以利用一個或更多個頻率載波來形成一個或更多個小區(例如,PCell和一個或一個以上SCell)。5G NR網路100中所示的通訊鏈路103可以包括從UE 102到網路節點101的上行鏈路傳輸(例如,在實體上行鏈路控制通道(Physical Uplink Control Channel,PUCCH)或實體上行鏈路共用通道(Physical Uplink Shared Channel,PUSCH)上),或者從網路節點101到UE 102的下行鏈路傳輸(例如,在實體下行鏈路控制通道(Physical Downlink Control Channel,PDCCH)或者實體下行共用通道(Physical Downlink Shared Channel,PDSCH)上)。The network node 101 can provide communication coverage for a geographic coverage area, where communication with the UE 102 is supported via the communication link 103 . The communication link 103 between the network node 101 and the UE 102 may utilize one or more frequency carriers to form one or more cells (eg, a PCell and one or more SCells). The communication link 103 shown in the 5G NR network 100 may include an uplink transmission from the UE 102 to the network node 101 (for example, on a Physical Uplink Control Channel (PUCCH) or a Physical Uplink on the physical uplink shared channel (Physical Uplink Shared Channel, PUSCH)), or the downlink transmission from the network node 101 to the UE 102 (for example, on the physical downlink control channel (Physical Downlink Control Channel, PDCCH) or the physical downlink shared channel (Physical Downlink Shared Channel, PDSCH)).

根據一新穎方面,UE 102可以從網路節點101接收命令。所述命令可以觸發候選小區的RACH過程。然後,UE 102可以基於所述命令執行RACH過程。具體地,UE 102可以基於與候選小區相關聯的TCI狀態來確定配置給候選小區的RACH資源。UE 102可以基於TCI狀態接收命令。此外,UE 102可以在RACH資源上向網路節點101發送與RACH過程相對應的消息或資訊。According to a novel aspect, UE 102 may receive commands from network node 101 . The order may trigger the RACH procedure of the candidate cell. UE 102 can then perform RACH procedures based on the order. Specifically, the UE 102 may determine the RACH resource configured for the candidate cell based on the TCI state associated with the candidate cell. UE 102 may receive commands based on TCI status. In addition, the UE 102 can send messages or information corresponding to the RACH procedure to the network node 101 on the RACH resource.

根據一新穎方面,來自網路節點101的命令可以至少指示TCI狀態的索引。此外,所述命令可以至少指示RACH過程的前導碼索引和用於無競爭隨機存取(contention free random access,CFRA)的實體RACH(physical RACH,PRACH)遮罩(mask)索引。According to a novel aspect, the command from the network node 101 may indicate at least an index of the TCI state. In addition, the command may indicate at least a preamble index of the RACH procedure and a physical RACH (physical RACH, PRACH) mask index for contention free random access (CFRA).

在一個示例中,所述命令可以是下行鏈路控制資訊(downlink control information,DCI),其至少針對DL接收向UE 102指示TCI狀態。在另一示例中,所述命令可以是媒體存取控制(medium access control,MAC)控制元素(control element,CE),其至少為啟動TCI狀態而向UE 102指示TCI狀態。在所述應用中,所述命令可以指示觸發RACH過程用於切換(或小區改變),或者指示觸發RACH過程用於其他操作(例如,定時提前(timing advance,TA)捕獲)。In one example, the command may be downlink control information (DCI) indicating TCI status to UE 102 at least for DL reception. In another example, the command may be a medium access control (MAC) control element (CE) that indicates the TCI status to the UE 102 at least for enabling the TCI status. In the application, the command may indicate to trigger the RACH procedure for handover (or cell change), or indicate to trigger the RACH procedure for other operations (for example, timing advance (timing advance, TA) acquisition).

根據一新穎方面,UE 102可以基於與RACH過程相關聯的TCI狀態來選擇或確定同步訊號(synchronization signal,SS)和實體廣播通道(physical broadcast channel,PBCH)塊(SSB)或通道狀態資訊(channel status information,CSI)-參考訊號(reference signal,RS)。也就是說,觸發的RACH過程可以與由UE 102基於TCI狀態確定或選擇的SSB或CSI-RS相關聯。SSB或CSI-RS可以是與至少准同址(quasi co location,QCL)類型D相關聯的源RS,其直接或間接與TCI狀態相關聯。According to a novel aspect, the UE 102 may select or determine a synchronization signal (SS) and a physical broadcast channel (PBCH) block (SSB) or channel state information (channel state information) based on a TCI state associated with a RACH procedure status information, CSI) - reference signal (reference signal, RS). That is, the triggered RACH procedure may be associated with the SSB or CSI-RS determined or selected by the UE 102 based on the TCI status. The SSB or CSI-RS may be a source RS associated with at least quasi co-location (QCL) type D, which is directly or indirectly associated with the TCI status.

根據一新穎方面,與RACH過程相關聯的TCI狀態可以與對應於候選小區的附加實體小區索引(physical cell index,PCI)相關聯。也就是說,如果TCI狀態與附加PCI相關聯,SSB或CSI-RS可以與附加PCI相關聯。此外,PRACH資源可以與SSB或CSI-RS相關聯。網路節點101可以針對每個附加PCI向UE 102配置RACH資源配置的參數(例如,RACH配置和RACH時機)。在一個示例中,UE 102可以確定或選擇與SSB或CSI-RS相對應的RACH資源。在另一示例中,網路節點101可以透過RACH資源配置來分配與SSB或CSI-RS相對應的RACH資源。在另一示例中,UE 102可以確定或選擇與SSB或CSI-RS相對應的RACH資源,並且網路節點101可以透過RACH資源配置來分配與SSB或者CSI-RS對應的RACH。According to a novel aspect, a TCI state associated with a RACH procedure may be associated with an additional physical cell index (PCI) corresponding to a candidate cell. That is, if the TCI state is associated with an additional PCI, the SSB or CSI-RS can be associated with the additional PCI. Also, PRACH resources can be associated with SSB or CSI-RS. The network node 101 may configure parameters of RACH resource configuration (eg, RACH configuration and RACH timing) to the UE 102 for each additional PCI. In one example, UE 102 can determine or select RACH resources corresponding to SSB or CSI-RS. In another example, the network node 101 may allocate RACH resources corresponding to SSB or CSI-RS through RACH resource configuration. In another example, UE 102 may determine or select RACH resources corresponding to SSB or CSI-RS, and network node 101 may allocate RACH resources corresponding to SSB or CSI-RS through RACH resource configuration.

根據一新穎方面,UE 102可以基於與RACH過程相關聯的TCI狀態來確定空間傳輸(transmission,Tx)濾波器。According to a novel aspect, UE 102 may determine a spatial transmission (Tx) filter based on a TCI state associated with a RACH procedure.

根據一新穎方面,在UE 102在RACH資源上向網路節點101發送與RACH過程相對應的消息或資訊之後,UE 102可以基於TCI狀態監測和接收RACH過程的RAR。According to a novel aspect, after the UE 102 sends a message or information corresponding to the RACH procedure to the network node 101 on the RACH resource, the UE 102 can monitor and receive the RAR of the RACH procedure based on the TCI status.

根據一新穎方面,當UE 102基於TCI狀態監測RACH過程的RAR時,UE 102可以透過基於TCI狀態來假設解調參考訊號(demodulation reference signal,DM-RS)天線埠QCL屬性來檢測控制通道上的DCI。此外,UE 102可以透過基於TCI狀態假設DM-RS天線埠QCL屬性來接收RAR。UE 102可以確定控制通道的設置。在一個示例中,UE 102可以基於與RACH過程相關聯的服務小區(或觸發RACH過程的小區)的配置來確定控制通道的設置。在另一示例中,UE 102可以基於與TCI狀態相關聯的候選小區的配置來確定控制通道的設置。在另一示例中,UE 102可以基於系統區塊(system information block,SIB)來確定控制通道的設置,其中SIB與基於TCI狀態確定的SSB相關聯。According to a novel aspect, when the UE 102 monitors the RAR of the RACH procedure based on the TCI status, the UE 102 can detect the RAR on the control channel by assuming the demodulation reference signal (DM-RS) antenna port QCL attribute based on the TCI status DCI. In addition, UE 102 can receive RAR by assuming DM-RS antenna port QCL attributes based on TCI status. UE 102 may determine settings for the control channel. In one example, UE 102 may determine the setting of the control channel based on the configuration of the serving cell associated with the RACH procedure (or the cell triggering the RACH procedure). In another example, the UE 102 can determine the setting of the control channel based on the configuration of the candidate cell associated with the TCI state. In another example, the UE 102 may determine the setting of the control channel based on a system information block (SIB), where the SIB is associated with the SSB determined based on the TCI state.

根據一新穎方面,網路節點101可以指示UE 102是否監測RAR。在一個示例中,網路節點101可以透過與RACH過程相關聯的命令來指示UE 102是否監測RAR。換句話說,所述命令可以指示UE 102是否需要監測RACH過程的RAR。如果所述命令指示UE不需要監測RACH過程的RAR,則意味著UE只需要向網路發送隨機存取前導碼。According to a novel aspect, the network node 101 may indicate to the UE 102 whether to monitor RAR. In one example, the network node 101 may instruct the UE 102 whether to monitor the RAR through a command associated with the RACH procedure. In other words, the order may indicate whether UE 102 needs to monitor RAR for RACH procedures. If the command indicates that the UE does not need to monitor the RAR of the RACH procedure, it means that the UE only needs to send the random access preamble to the network.

根據一新穎方面,UE 102可以將RAR或TA命令中指示的初始TA值應用於與TCI狀態相關聯的TA組。According to a novel aspect, the UE 102 can apply the initial TA value indicated in the RAR or TA command to the TA group associated with the TCI state.

根據一新穎方面,如果命令指示觸發RACH過程用於小區改變或切換,UE 102可以在RACH資源上將與RACH過程相對應的消息或資訊(例如,隨機存取前導碼)發送到候選小區(或目標小區)中的另一網路節點。在UE 102從候選小區(或目標小區)的網路節點接收到RAR之後,UE 102可以基於TCI狀態執行小區改變或切換。According to a novel aspect, if the command indicates to trigger a RACH procedure for cell change or handover, UE 102 may send a message or information (e.g., random access preamble) corresponding to the RACH procedure to the candidate cell (or another network node in the target cell). After the UE 102 receives the RAR from the network node of the candidate cell (or target cell), the UE 102 may perform a cell change or handover based on the TCI status.

第2圖描述了根據本發明某些實施方式的網路節點和UE的簡化框圖。網路節點201可以是BS或gNB,但本發明不應限於此。UE 202可以是智慧型電話、可穿戴設備、IoT設備和PC等。或者,UE 202可以是插入或安裝有資料卡的NB或PC,其中資料卡包括數據機和RF收發器以提供無線通訊的功能。Figure 2 depicts a simplified block diagram of a network node and a UE according to some embodiments of the present invention. The network node 201 may be a BS or a gNB, but the present invention should not be limited thereto. UE 202 may be a smart phone, a wearable device, an IoT device, a PC, etc. Alternatively, the UE 202 may be a NB or a PC with a data card inserted or installed, wherein the data card includes a modem and an RF transceiver to provide wireless communication functions.

網路節點201具有天線陣列211(天線陣列211具有發送和接收無線電訊號的複數個天線)、一個或更多個射頻(radio frequency,RF)收發器212,與天線陣列211耦合,從天線陣列211接收RF訊號,將它們轉換為基頻訊號,並發送到處理器213。RF收發器212亦轉換從處理器213接收的基頻訊號,將它們轉換為RF訊號,並發送到天線陣列211。處理器213處理接收到的基頻訊號並調用不同功能模組和電路220以執行網路節點201中的功能。記憶體214存儲程式指令和資料215以控制網路節點201的操作。網路節點201亦包括實現根據本發明實施方式的不同任務的複數個功能模組和電路。The network node 201 has an antenna array 211 (the antenna array 211 has a plurality of antennas for transmitting and receiving radio signals), one or more radio frequency (radio frequency, RF) transceivers 212, coupled with the antenna array 211, from the antenna array 211 The RF signals are received, converted to baseband signals, and sent to the processor 213 . The RF transceiver 212 also converts the baseband signals received from the processor 213 , converts them to RF signals, and sends them to the antenna array 211 . The processor 213 processes the received baseband signal and invokes various functional modules and circuits 220 to perform functions in the network node 201 . The memory 214 stores program instructions and data 215 to control the operation of the network node 201 . The network node 201 also includes a plurality of functional modules and circuits for realizing different tasks according to the embodiments of the present invention.

類似地,UE 202具有發送和接收無線電訊號的天線231陣列。RF收發器232與天線耦合,從天線陣列231接收RF訊號,將它們轉換為基頻訊號,並發送到處理器233。RF收發器232亦轉換從處理器233接收的基頻訊號,將它們轉換為RF訊號,並發送到天線陣列231。處理器233處理接收到的基頻訊號並調用不同功能模組和電路240以執行UE 202中的功能。記憶體234存儲程式指令和資料235以控制UE 202的操作。UE 202亦包括實現根據本發明實施方式的不同任務的複數個功能模組和電路。Similarly, UE 202 has an array of antennas 231 for sending and receiving radio signals. The RF transceiver 232 is coupled to the antenna, receives RF signals from the antenna array 231 , converts them into fundamental frequency signals, and sends them to the processor 233 . The RF transceiver 232 also converts the baseband signals received from the processor 233 , converts them to RF signals, and sends them to the antenna array 231 . The processor 233 processes the received baseband signal and invokes various functional modules and circuits 240 to perform functions in the UE 202 . Memory 234 stores program instructions and data 235 to control the operation of UE 202 . The UE 202 also includes a plurality of functional modules and circuits for implementing different tasks according to the embodiments of the present invention.

功能模組和電路220和240可以由硬體、韌體、軟體及其任意組合來實現和配置。當由處理器213和233執行時(例如,透過執行程式指令和資料215和235),功能模組和電路220和240允許網路節點201和UE 202執行本發明的實施例。The functional modules and circuits 220 and 240 can be realized and configured by hardware, firmware, software and any combination thereof. When executed by processors 213 and 233 (eg, by executing program instructions and data 215 and 235), functional modules and circuits 220 and 240 allow network node 201 and UE 202 to perform embodiments of the present invention.

在第2圖的示例中,網路節點201包括資源分配電路221和配置電路222。資源分配電路22可以為UE 202分配與RACH過程相關聯的TCI狀態。配置電路222可以向UE 202發送觸發候選小區的RACH過程的命令。In the example of FIG. 2 , the network node 201 includes a resource allocation circuit 221 and a configuration circuit 222 . Resource allocation circuitry 22 may allocate UE 202 a TCI state associated with a RACH procedure. The configuration circuit 222 may send a command to the UE 202 to trigger the RACH procedure of the candidate cell.

在第2圖的示例中,UE 202可以包括確定電路241和報告電路242。確定電路241可以基於來自網路節點201的命令來觸發PRACH過程,並基於與候選小區相關聯的TCI狀態來確定配置給候選小區的RACH資源。報告電路242可以在RACH資源上向網路節點201發送與RACH過程相對應的消息或資訊(例如,隨機存取前導碼)。In the example of FIG. 2 , UE 202 may include determining circuitry 241 and reporting circuitry 242 . The determination circuit 241 may trigger the PRACH procedure based on the command from the network node 201, and determine the RACH resource configured for the candidate cell based on the TCI state associated with the candidate cell. The reporting circuit 242 may send messages or information (eg, random access preamble) corresponding to the RACH procedure to the network node 201 on the RACH resource.

第3圖描述了根據新穎方面的用於小區改變或切換的RACH過程。在步驟310中,服務小區中的網路節點301向UE 302發送命令。所述命令觸發候選小區的RACH過程。Figure 3 depicts RACH procedures for cell change or handover in accordance with novel aspects. In step 310 , the network node 301 in the serving cell sends a command to the UE 302 . The command triggers the RACH procedure of the candidate cell.

在步驟320中,UE 302基於與候選小區相關聯的TCI狀態來確定配置給候選小區的RACH資源。UE 302可以基於與候選小區相關聯的TCI狀態來接收命令。In step 320, the UE 302 determines the RACH resources configured for the candidate cell based on the TCI state associated with the candidate cell. UE 302 can receive the order based on the TCI status associated with the candidate cell.

在步驟330中,UE 302在RACH資源上向候選小區(或目標小區)中的網路節點303發送RACH過程的消息或資訊(例如,隨機存取前導碼)。In step 330, the UE 302 sends the message or information of the RACH procedure (eg, random access preamble) to the network node 303 in the candidate cell (or target cell) on the RACH resource.

步驟320和330可應用於常規RACH過程的消息1(Msg1)。Steps 320 and 330 are applicable to message 1 (Msg1 ) of the conventional RACH procedure.

在步驟340中,UE 302可以基於TCI狀態來監測RACH過程的RAR。所述命令可以指示UE 302是否需要監測RACH過程的RAR。In step 340, the UE 302 may monitor the RAR of the RACH procedure based on the TCI status. The order may indicate whether the UE 302 needs to monitor the RAR of the RACH procedure.

在步驟350中,候選小區中的網路節點303可以向UE 302發送RACH過程的RAR。In step 350 , the network node 303 in the candidate cell may send the RAR of the RACH procedure to the UE 302 .

步驟340和350可應用於常規RACH過程的消息2(Msg2)。Steps 340 and 350 are applicable to message 2 (Msg2) of the conventional RACH procedure.

在步驟360中,UE 302可以基於TCI狀態執行小區改變或切換(即,從服務小區切換到目標小區)。In step 360, the UE 302 may perform a cell change or handover (ie, handover from a serving cell to a target cell) based on the TCI state.

第4圖係根據本發明新穎方面的RACH過程的方法流程圖。在步驟401中,UE從網路節點接收命令,所述命令觸發候選小區的RACH過程。Figure 4 is a method flow diagram of a RACH procedure in accordance with the novel aspects of the present invention. In step 401, the UE receives an order from the network node, the order triggers the RACH procedure of the candidate cell.

在步驟402中,UE基於與候選小區相關聯的TCI狀態來確定配置給候選小區的RACH資源。在所述實施例中,UE可以基於與候選小區相關聯的TCI狀態來接收命令。In step 402, the UE determines RACH resources configured for the candidate cell based on the TCI state associated with the candidate cell. In the described embodiment, the UE may receive the order based on the TCI status associated with the candidate cell.

在步驟403中,UE在RACH資源上向網路節點發送消息。In step 403, the UE sends a message to the network node on the RACH resource.

第5圖係根據本發明另一新穎方面的RACH過程的方法流程圖。在步驟501中,UE從服務小區中的第一網路節點接收命令,所述命令觸發候選小區的RACH過程。在所述實施例中,所述命令還指示觸發RACH過程用於小區改變或切換。Fig. 5 is a method flow diagram of a RACH procedure according to another novel aspect of the present invention. In step 501, a UE receives an order from a first network node in a serving cell, and the order triggers a RACH procedure of a candidate cell. In said embodiment, said order also indicates to trigger RACH procedure for cell change or handover.

在步驟502中,UE基於與候選小區相關聯的TCI狀態來確定配置給候選小區的RACH資源。在所述實施例中,UE可以基於與候選小區相關聯的TCI狀態來接收命令。In step 502, the UE determines RACH resources configured for the candidate cell based on the TCI state associated with the candidate cell. In the described embodiment, the UE may receive the order based on the TCI status associated with the candidate cell.

在步驟503中,UE在RACH資源上向候選小區(或目標小區)中的第二網路節點發送消息。In step 503, the UE sends a message to the second network node in the candidate cell (or target cell) on the RACH resource.

步驟504中,UE從第二網路節點接收RACH過程的RAR。In step 504, the UE receives the RAR of the RACH procedure from the second network node.

在步驟505中,UE基於TCI狀態觸發小區改變或切換。In step 505, the UE triggers a cell change or handover based on the TCI state.

儘管已經結合用於指導目的的某些特定實施方式描述了本發明,但本發明不限於此。因此,在不背離申請專利範圍中闡述的本發明的範圍的情況下,可以實現對所述實施方式的各種特徵的各種修改、改編和組合。Although the invention has been described in connection with certain specific embodiments for instructional purposes, the invention is not limited thereto. Accordingly, various modifications, adaptations and combinations of the various features of the described embodiments may be effected without departing from the scope of the invention as set forth in the claims.

100:5G NR網路 101,201,301,303:網路節點 102,202,302:UE 103:通訊鏈路 110:存取網路 120:核心網路 211,231:天線陣列 212,232:RF收發器 213,233:處理器 214,234:記憶體 215,235:程式指令和資料 220,240:功能模組和電路 221:資源分配電路 222:配置電路 241:確定電路 242:確定電路 310,320,330,340,350,360,401,402,403,501,502,503,504,505:步驟 100:5G NR network 101,201,301,303: network nodes 102,202,302:UE 103: Communication link 110: access network 120: Core network 211,231: Antenna array 212,232: RF transceiver 213,233: Processor 214,234: memory 215, 235: Program instructions and data 220,240: Functional modules and circuits 221: Resource allocation circuit 222: Configuration circuit 241: Determine the circuit 242: Determine the circuit 310,320,330,340,350,360,401,402,403,501,502,503,504,505: steps

圖式描述了本發明的實施方式,其中相同數字表示相同的部件。 第1圖描述了根據本發明各方面的示例性5G NR網路100。 第2圖描述了根據本發明某些實施方式的網路節點和UE的簡化框圖。 第3圖描述了根據新穎方面的用於小區改變或切換的RACH過程。 第4圖係根據本發明新穎方面的RACH過程的方法流程圖。 第5圖係根據本發明另一新穎方面的RACH過程的方法流程圖。 The drawings depict embodiments of the invention, wherein like numerals refer to like parts. FIG. 1 depicts an exemplary 5G NR network 100 in accordance with aspects of the present invention. Figure 2 depicts a simplified block diagram of a network node and a UE according to some embodiments of the present invention. Figure 3 depicts RACH procedures for cell change or handover in accordance with novel aspects. Figure 4 is a method flow diagram of a RACH procedure in accordance with the novel aspects of the present invention. Fig. 5 is a method flow diagram of a RACH procedure according to another novel aspect of the present invention.

302:UE 302:UE

301,303:網路節點 301,303: network nodes

310,320,330,340,350,360:步驟 310, 320, 330, 340, 350, 360: steps

Claims (13)

一種隨機存取通道過程的方法,包括: 一使用者設備從一網路節點接收一命令,所述命令觸發一候選小區的一隨機存取通道過程;以及 所述使用者設備基於與所述候選小區相關聯的一傳輸配置指示符狀態來確定配置給所述候選小區的一隨機存取通道資源;以及 所述使用者設備在所述隨機存取通道資源上向所述網路節點發送一消息。 A method of randomly accessing a channel process, comprising: a UE receives a command from a network node that triggers a random access channel procedure for a candidate cell; and determining, by the UE, a RACH resource allocated to the candidate cell based on a transmission configuration indicator state associated with the candidate cell; and The UE sends a message to the network node on the RACH resource. 如請求項1所述的隨機存取通道過程的方法,其中,所述命令至少指示所述傳輸配置指示符狀態的一索引。The method for random access channel procedure as claimed in claim 1, wherein said command indicates at least an index of said transmission configuration indicator state. 如請求項1所述的隨機存取通道過程的方法,其中,所述使用者設備基於所述傳輸配置指示符狀態接收所述命令。The method for random access channel procedure as claimed in claim 1, wherein the UE receives the command based on the transmission configuration indicator state. 如請求項1所述的隨機存取通道過程的方法,其中,所述命令至少指示一前導碼索引和一實體隨機存取通道遮罩索引。The method for random access channel procedure according to claim 1, wherein the command indicates at least a preamble index and a physical random access channel mask index. 如請求項1所述的隨機存取通道過程的方法,其中,所述命令是一下行鏈路控制資訊或一媒體存取控制控制元素。The method for random access channel procedure as claimed in claim 1, wherein the command is a downlink control information or a media access control control element. 如請求項1所述的隨機存取通道過程的方法,其中,所述觸發的隨機存取通道過程與一同步訊號和實體廣播通道塊或一通道狀態資訊參考訊號相關聯,其中所述同步訊號和實體廣播通道塊或所述通道狀態資訊參考訊號基於所述傳輸配置指示符狀態確定,並且所述隨機存取通道資源與所述同步訊號和實體廣播通道塊或所述通道狀態資訊參考訊號相關聯。The method for random access channel process as claimed in claim 1, wherein the triggered random access channel process is associated with a synchronization signal and a physical broadcast channel block or a channel state information reference signal, wherein the synchronization signal and the physical broadcast channel block or the channel state information reference signal is determined based on the transmission configuration indicator state, and the random access channel resource is related to the synchronization signal and the physical broadcast channel block or the channel state information reference signal couplet. 如請求項1所述的隨機存取通道過程的方法,還包括: 所述使用者設備基於所述傳輸配置指示符狀態監測所述隨機存取通道過程的一隨機存取響應。 The method for the random access channel process as described in claim item 1, further comprising: The UE monitors a random access response of the random access channel process based on the transmission configuration indicator state. 如請求項1所述的隨機存取通道過程的方法,其中,所述命令指示所述使用者設備是否需要監測所述隨機存取通道過程的一隨機存取響應。The method for a random access channel procedure according to claim 1, wherein the command indicates whether the UE needs to monitor a random access response of the random access channel procedure. 如請求項7所述的隨機存取通道過程的方法,還包括: 在所述命令指示觸發所述隨機存取通道過程用於一小區改變或切換的情況下,所述使用者設備在接收到所述隨機存取響應之後基於所述傳輸配置指示符狀態執行所述小區改變或切換。 The method for the random access channel process as described in claim item 7, further comprising: In case the command indicates to trigger the random access channel procedure for a cell change or handover, the UE performs the Cell change or handover. 如請求項7所述的隨機存取通道過程的方法,所述監測還包括: 透過基於所述傳輸配置指示符狀態假設解調參考訊號天線埠准同址特性來檢測一控制通道上的一下行鏈路控制資訊。 As the method for the random access channel process described in claim item 7, the monitoring also includes: A downlink control message on a control channel is detected by assuming a DRS antenna port quasi-co-location property based on the TCI state. 如請求項10所述的隨機存取通道過程的方法,還包括: 所述使用者設備基於與所述隨機存取通道過程相關聯的一服務小區的一配置、與所述傳輸配置指示符狀態相關聯的一候選小區的一配置和與基於所述傳輸配置指示符狀態確定的一同步訊號塊相關聯的一系統區塊中的至少一個來確定所述控制通道的一設置。 The method for the random access channel process as described in claim item 10, further comprising: The UE is based on a configuration of a serving cell associated with the random access channel procedure, a configuration of a candidate cell associated with the transmission configuration indicator state and based on the transmission configuration indicator The state of at least one of a system block associated with a sync signal block is determined to determine a setting of the control channel. 如請求項7所述的隨機存取通道過程的方法,還包括: 所述使用者設備將所述隨機存取響應或一定時提前命令中指示的一初始定時提前值應用於與所述傳輸配置指示符狀態相關聯的一定時提前組。 The method for the random access channel process as described in claim item 7, further comprising: The UE applies an initial timing advance value indicated in the random access response or a certain timing advance command to a certain timing advance group associated with the transmission configuration indicator state. 一種用於隨機存取通道過程的使用者設備,包括: 一接收器,從一網路節點接收一命令,所述命令觸發一候選小區的一隨機存取通道過程; 一處理器,基於與所述候選小區相關聯的一傳輸配置指示符狀態來確定配置給所述候選小區的一隨機存取通道資源;以及 一發送器,在所述隨機存取通道資源上向所述網路節點發送一消息。 A user equipment for a random access channel process, comprising: a receiver for receiving a command from a network node, the command triggering a random access channel procedure for a candidate cell; a processor for determining a random access channel resource allocated to the candidate cell based on a transmission configuration indicator state associated with the candidate cell; and A sender sends a message to the network node on the random access channel resource.
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