CN110034877B

CN110034877B - Method and equipment for transferring configuration information of supplemental uplink carrier

Info

Publication number: CN110034877B
Application number: CN201810028304.7A
Authority: CN
Inventors: 汪巍崴; 王弘; 许丽香
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2018-01-11
Filing date: 2018-01-11
Publication date: 2024-04-09
Anticipated expiration: 2038-01-11
Also published as: CN110034877A; CN118157830A

Abstract

The invention discloses a method for transmitting configuration information of a supplementary uplink carrier, which comprises the following steps: the method comprises the steps that a first network side entity obtains supplementary uplink carrier SUL configuration information; the first network side entity sends a configuration message carrying SUL configuration information to the second network side entity. Compared with the prior art, the invention helps the base station (or the centralized unit of the base station) to know SUL configuration of other base stations (or the distributed units of the base station) by transmitting the interactive SUL configuration information between the network side entities, so that the network side entities can determine whether to configure a cell containing SUL for UE or not, thereby fully utilizing the SUL to expand the uplink coverage of the system.

Description

Method and equipment for transferring configuration information of supplemental uplink carrier

Technical Field

The present invention relates to the field of wireless communications technologies, and in particular, to a method and apparatus for delivering configuration information of a supplemental uplink carrier.

Background

In an NR (New Radio access) network or a 5G network, in order to improve coverage of an uplink signal, particularly at a high frequency, a concept of a SUL (Supplementary uplink, supplementary uplink carrier) is proposed. For FDD systems, typically one UE (user equipment) will be configured with one downlink carrier (or frequency/band) and one uplink carrier (or frequency/band) (referred to as non-SUL carrier in this disclosure). To improve uplink coverage, NR supports configuring the UE with another uplink carrier (or frequency/frequency band), which is the SUL. In this way, one UE may configure two uplink carriers (one non-SUL carrier and one SUL carrier) and one downlink carrier, which belong to the same cell, see fig. 1. For TDD systems, generally, a UE is configured with a carrier on which the UE performs uplink and downlink communications in a time division manner, and in order to improve uplink coverage, NR supports configuring another uplink carrier (or frequency/frequency band) for the UE, where the uplink carrier is a SUL, and thus a UE is configured with a SUL carrier and a TDD carrier (referred to as a non-SUL carrier in the present invention), where the two carriers belong to the same cell, see fig. 2.

When the SUL is introduced in one cell, one UE can transmit data on two uplink carriers, but under the control of the network, one UE cannot transmit data on the uplink shared channel (PUSCH) on the two uplink carriers at the same time. When the UE initially accesses a cell containing the SUL, the UE compares its measured downlink signal strength of the cell with a threshold, and if the downlink signal strength is below the threshold, the UE may perform a random access procedure on the SUL to access the cell.

To support the SUL, the NR system defines some configuration information related to the SUL. The network side may decide whether to configure the SUL for the UE or whether to schedule the UE to transmit data on the SUL according to the channel state of the UE. However, the current system cannot exchange SUL configuration information between related network side entities (such as between base stations, between a centralized unit and a distributed unit of a base station), and cannot add/modify/release SUL for UE between network side entities, which results in that the network side entities do not know respective cell configuration information, cannot decide whether to configure cells containing SUL for UE, and further triggers the network side entities to perform SUL configuration. In addition, when the UE fails in radio link, the network side cannot determine whether the failure is caused by using the SUL, and cannot correct the SUL parameter configuration for the failure caused by the SUL, which affects the implementation of the purpose of introducing the SUL to enhance uplink coverage. In view of the foregoing, it is desirable to provide a method and apparatus for delivering supplemental uplink carrier configuration information that can solve the above-mentioned problems.

Disclosure of Invention

The invention aims at: the method and the device for transmitting the configuration information of the supplemental uplink carrier can effectively enhance the uplink coverage of the NR system.

In order to achieve the above object, the present invention provides a resource allocation information transfer method, which includes the steps of:

the method comprises the steps that a first network side entity obtains supplementary uplink carrier SUL configuration information;

the first network side entity sends a configuration message carrying SUL configuration information to the second network side entity.

Preferably, the SUL configuration information includes at least one of the following:

SUL configuration information of at least one first cell, wherein the first cell is a cell served by a first network side entity;

SUL configuration information of at least one first neighbor cell, wherein the first neighbor cell is a neighbor cell of a cell served by a first network side entity;

SUL configuration information of at least one second cell, wherein the second cell is a cell served by other base stations;

and SUL configuration information of at least one second neighbor cell, wherein the second neighbor cell is a neighbor cell of cells served by other base stations.

SUL configuration information of at least one first cell serving User Equipment (UE), the first cell being a cell served by a first network side entity, the UE being a UE served by the first network side entity.

Preferably, the configuration message further carries at least one of the following information:

indication information related to an uplink carrier of the UE;

indication information related to modifying the configuration of the uplink carrier of the UE;

configuring indication information of random access related information on SUL for UE;

modifying indication information of random access related information on SUL for UE;

at least one first cell supports indication information of SUL, and the first cell is a cell served by a first network side entity;

and the indication information of the SUL is supported by at least one first neighbor cell, wherein the first neighbor cell is a neighbor cell of a cell served by the first network side entity.

SUL supporting indication information of at least one second cell, wherein the second cell is served by other base stations;

and at least one second neighbor cell supporting SUL indication information, wherein the second neighbor cell is a neighbor cell of a cell served by other base stations.

Preferably, before the first network side entity obtains the configuration information of the supplementary uplink carrier SUL, the method further includes:

the method comprises the steps that a first network side entity receives a request message which is sent by a second network side entity and used for acquiring SUL configuration information, wherein the request message carries the SUL configuration information acquired by the second network side entity.

Preferably, the SUL configuration information acquired by the second network side entity includes at least one of the following:

SUL configuration information of at least one first cell, wherein the first cell is a cell served by a second network side entity;

SUL configuration information of at least one first neighbor cell, wherein the first neighbor cell is a neighbor cell of a cell served by a second network side entity;

Preferably, the request message further carries at least one of the following:

indication information related to an uplink carrier of the UE;

the indication information of supporting SUL of at least one first cell, the first cell is a cell served by a second network side entity;

the indication information of the SUL is supported by at least one first adjacent cell, and the first adjacent cell is the adjacent cell of the cell served by the second network side entity;

SUL supporting indication information of at least one first cell, wherein the first cell is served by other base stations;

Information about the measurement results of the cells.

Preferably, after receiving the request message for obtaining the SUL configuration information sent by the second network side entity, the first network side entity includes:

if the request message carries indication information related to the uplink carrier of the UE, the first network side entity judges whether SUL configuration information needs to be sent to the second network side entity according to the indication information related to the uplink carrier of the UE;

if yes, executing the step that the first network side entity acquires the configuration information of the supplementary uplink carrier SUL.

Preferably, the indication information related to the uplink carrier of the UE includes at least one of the following:

configuring indication information of non-supplementary uplink carrier non-SUL for UE;

configuring indication information of SUL for UE;

and configuring non-SUL and indication information of the SUL for the UE.

Preferably, after the first network side entity sends the configuration message carrying the SUL configuration information to the second network side entity, the method further includes:

The first network side entity receives a confirmation message sent by the second network side entity, wherein the confirmation message comprises at least one of the following items:

SUL configuration information of at least one second neighbor cell, wherein the second neighbor cell is a neighbor cell of a cell served by other base stations;

at least one first neighbor cell supports indication information of SUL, wherein the first neighbor cell is a neighbor cell of a cell served by a second network side entity;

Preferably, the SUL configuration information includes at least one of:

Identification information of a cell in which the SUL is located;

identification information of a base station of a cell where the SUL is located;

carrier frequency of the SUL;

bandwidth of the SUL;

an initial upstream bandwidth portion of the SUL;

signal strength threshold information of SUL;

configuration information about random access on the SUL;

configuration information of a Physical Uplink Control Channel (PUCCH) on the SUL;

configuration information of a Physical Uplink Shared Channel (PUSCH) on the SUL;

configuration information of sounding reference signal SRS on SUL.

Preferably, the method comprises the steps of,

the first network side entity comprises a first base station, and the second network side entity comprises a second base station; or (b)

The first network side entity comprises a distribution unit of the first base station, and the second network side entity comprises a concentration unit of the first base station.

In order to achieve the above object, the present invention further provides a network side device, which includes:

the SUL configuration information acquisition module is used for acquiring SUL configuration information;

the SUL configuration information sending module is used for sending a configuration message carrying SUL configuration information to the network side entity.

In order to achieve the above object, the present invention also provides a configuration optimization information transfer method, which includes the following steps:

the method comprises the steps that a first network side entity obtains information related to link failure of User Equipment (UE);

And the first network side entity optimizes the configuration parameters of the UE served by the first network side entity according to the information related to the link failure.

Preferably, the first network side entity obtains information related to link failure of the UE, including:

the method comprises the steps that a first network side entity receives a message sent by UE and acquires information related to link failure of the UE; or (b)

The first network side entity receives information related to link failure of the UE sent by the second network side entity.

Preferably, the information related to link failure of the UE sent by the second network side entity is sent by the third network side entity to the second network side entity; or the third network side entity receives the link failure related information of the UE sent by the UE and forwards the link failure related information to the second network side entity; or the UE sends the message to the second network entity.

Preferably, the information related to link failure includes at least one of:

the reason information of the link failure of the UE;

information related to the use of the supplementary uplink carrier SUL by the UE.

Preferably, the first network side entity includes a base station, a centralized unit of the base station, or a distributed unit of the base station; the second network side entity comprises a base station, a centralized unit of the base station or a distributed unit of the base station; the third network side entity comprises a base station, a centralized unit of the base station or a distributed unit of the base station.

the link failure information acquisition module is used for acquiring information related to link failure of User Equipment (UE);

and the optimization processing module is used for carrying out optimization processing on the configuration parameters of the served UE according to the information related to the link failure.

the User Equipment (UE) acquires information related to link failure;

and the UE sends the information related to the link failure to a network side entity.

Preferably, the information related to link failure includes at least one of:

the reason information of the link failure of the UE;

In order to achieve the above object, the present invention also provides a user equipment, including:

the link failure information acquisition module is used for acquiring information related to link failure;

and the link failure information sending module is used for sending the information related to the link failure to a network side entity.

Compared with the prior art, the technical effects of the invention include but are not limited to: through transferring the interactive SUL configuration information between the network side entities, the base station (or the centralized unit of the base station) is helped to know SUL configuration of other base stations (or the distributed units of the base station), so that the network side entity can decide whether to configure a cell containing SUL for UE or not, and the SUL is fully utilized to expand uplink coverage of the system.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of an FDD system supplemental uplink carrier;

fig. 2 is a schematic diagram of a TDD system supplemental uplink carrier;

fig. 3 is a flowchart of a method for configuring a supplemental uplink carrier according to the present invention;

fig. 4 is a schematic diagram of interaction of SUL configuration information between two base stations according to an embodiment of the present invention;

fig. 5 is a schematic diagram of interaction of SUL configuration information between a centralized unit and a distributed unit of a base station according to an embodiment of the present invention;

FIG. 6 is a diagram illustrating a second embodiment of a base station hub unit determining to add/modify/release SULs;

fig. 7 is a schematic diagram of selecting a SUL for random access by a UE according to a second embodiment of the present invention;

fig. 8 is a schematic diagram of adding/modifying/releasing SUL determined by a base station distribution unit (assisted by a centralized unit) according to a second embodiment of the present invention;

fig. 9 is a schematic diagram of adding/modifying/releasing SUL determined by a base station distribution unit according to a second embodiment of the present invention;

Fig. 10 is a schematic diagram of a radio link failure mode of a UE in the third embodiment of the present invention;

fig. 11 is a schematic diagram of another radio link failure mode of the UE in the third embodiment of the present invention;

fig. 12 is a schematic diagram of a UE reporting a link failure report to a network side according to the third embodiment of the present invention;

fig. 13 is a schematic diagram of a distribution unit of a three-base station reporting a link failure report to a centralized unit according to an embodiment of the present invention;

fig. 14 is a block diagram of a network side device for supplementing an uplink carrier configuration method according to the present invention.

Detailed Description

Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of illustrating the present disclosure and are not to be construed as limiting the present disclosure.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As used herein, a "terminal" or "user equipment" includes both a device of a wireless signal receiver having no transmitting capability and a device of receiving and transmitting hardware having receiving and transmitting hardware capable of bi-directional communication over a bi-directional communication link, as will be appreciated by those skilled in the art. Such a device may include: a cellular or other communication device having a single-line display or a multi-line display or a cellular or other communication device without a multi-line display; a PCS (PerSonal CommunicationS Service, personal communication system) that may combine voice, data processing, facsimile and/or data communication capabilities; a PDA (PerSonal Digital ASSiStant ) that can include a radio frequency receiver, pager, internet/intranet access, web browser, notepad, calendar and/or GPS (Global PoSitioning SyStem ) receiver; a conventional laptop and/or palmtop computer or other appliance that has and/or includes a radio frequency receiver. As used herein, "terminal," "terminal device" may be portable, transportable, installed in a vehicle (aeronautical, maritime, and/or land-based), or adapted and/or configured to operate locally and/or in a distributed fashion, to operate at any other location(s) on earth and/or in space. The "terminal" and "terminal device" used herein may also be a communication terminal, a network access terminal, and a music/video playing terminal, for example, may be a PDA, a MID (Mobile Internet Device ), and/or a mobile phone with a music/video playing function, and may also be a smart tv, a set top box, and other devices.

The base station to which the present disclosure relates may be a base station (gNB) of an NR system, a base station (eNB) of an LTE system, or other types of base stations. The interface between the base stations is an X2 interface or an Xn interface or other interfaces. In addition, one base station may include a CU (Central unit) and a Distributed Unit (DU). The CUs have at least Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP) protocol layers, etc., and may also include service data adaptation protocols (SDAP, service Data Adaptation Protocol). The DUs have radio link control protocol (RLC), medium Access Control (MAC), physical layer, etc. Between CU and DU is a standardized public interface F1, or other interface.

The message names mentioned in this disclosure are examples only, and other names may be employed.

SUL configuration information referred to in this disclosure includes at least one of the following:

1. identification information of cell where SUL is located

2. Identification information of base station of cell where SUL is located

3. Basic parameters of the SUL (reference may be made to FrequencyInfoUL in TS 38.331), which include at least one of the following information:

(1) Carrier frequency of SUL

(2) SUL bandwidth

(3) Initial upstream bandwidth portion of SUL

4. The signal strength threshold information of the SUL is used to perform a random access procedure on the SUL to access a cell if the measured signal strength (RSRP) of the cell is lower than the threshold value when the UE performs initial access on the cell. Reference is made to sul-RSRP-Threshold in TS38.331

5. The configuration information related to random access on SUL may be Cell-specific (i.e. configuration information related to Cell-specific random access), UE-specific (i.e. configuration information related to UE-specific random access), or Cell-specific random access-related configuration information and configuration information related to UE-specific random access, and reference may be made to RACH-ConfigCommon, RACH-ConfigDedic in TS38.331

6. Configuration information of PUCCH (Physical Uplink Control Channel ) on SUL may be Cell-specific (i.e. Cell-specific PUCCH-related configuration information), UE-specific (i.e. UE-specific PUCCH-related configuration information), or configuration information of PUCCH containing Cell-specific and UE-specific PUCCH may be referred to as PUCCH-Config in TS38.331

7. Configuration information of PUSCH (Physical Uplink Shared Channel ) on SUL may be Cell-specific (i.e. Cell-specific PUSCH-related configuration information), UE-specific (i.e. UE-specific PUSCH-related configuration information), or may contain Cell-specific PUSCH configuration information and UE-specific PUSCH configuration information, and reference may be made to PUSCH-Config in TS38.331

8. Configuration information of SRS (Sounding reference signal ) on SUL may be Cell-specific (i.e. Cell-specific SRS-related configuration information), UE-specific (i.e. UE-specific SRS-related configuration information), or configuration information of SRS of Cell-specific and SRS of UE-specific may be contained, and reference may be made to SRS-Config in TS38.331

Referring to fig. 3, a method for transmitting configuration information of a supplemental uplink carrier according to the present disclosure includes the following steps:

step 101, a first network side entity acquires SUL configuration information;

step 102, a first network side entity sends a configuration message carrying SUL configuration information to a second network side entity so that the second network side entity obtains the resource configuration condition of the first network side entity; further, the second network entity may configure the SUL for the UE.

The method for transmitting the configuration information of the supplementary uplink carrier disclosed by the disclosure specifically comprises two aspects:

1. how to interact the configuration information of the SUL between network entities (between base stations, or between a centralized unit and a distributed unit of a base station).

2. How the addition/modification/release of the SUL is made between network entities (between base stations, or between a centralized unit and a distributed unit of a base station).

The configuration optimization information transmission method disclosed by the disclosure specifically comprises the following steps:

3. how the UE reports information about the radio link failure related to the SUL to the network side.

Examples of these three aspects are given below, respectively.

Example 1

1. The configuration information of the SUL is interacted between two base stations (base station 1 and base station 2), and the interface between the base stations can be X2, xn or other interface types. Please refer to fig. 4.

Step 1: the base station 1 transmits a message 1 (request message for acquiring SUL configuration) to the base station 2, the message including at least one of the following information:

1. identification information of at least one cell served by the base station 1;

2. SUL configuration information for at least one cell served by base station 1, indicating that at least one cell served by base station 1 supports SUL. If none of the cells served by the base station 1 support SUL, this information is not included;

3. Identification information of at least one neighbor cell of at least one cell served by the base station 1, that is, identification information of at least one neighbor cell, which is a neighbor cell of any one cell served by the base station 1;

4. SUL configuration information of at least one neighbor cell of at least one cell served by the base station 1, that is, SUL configuration information of at least one neighbor cell, which is a neighbor cell of any one cell served by the base station 1, indicates that at least one neighbor cell of at least one cell served by the base station 1 supports SUL. If none of the neighbor cells of the cell served by the base station 1 supports SUL, this information is not included;

5. identification information of at least one cell served by other base stations;

6. SUL configuration information for at least one cell served by other base stations, the information indicating that the at least one cell served by the other base stations supports SULs. If the SUL is not supported by the cells served by the other base stations, the information is not contained;

7. identification information of at least one neighbor cell of at least one cell served by other base stations, that is, identification information of at least one neighbor cell, the neighbor cell being a neighbor cell of any one cell served by the other base stations;

8. SUL configuration information of at least one neighbor cell of at least one cell served by other base stations, that is, SUL configuration information of at least one neighbor cell, the neighbor cell being a neighbor cell of any one cell served by the other base stations, the information indicating that at least one neighbor cell of at least one cell served by the other base stations supports SUL. If none of the neighbor cells of the cell served by the base station 1 supports SUL, this information is not included;

9. indication information of at least one cell supporting SUL served by the base station 1;

10. at least one neighbor cell of at least one cell served by the base station 1 supports indication information of the SUL.

11. Indication information of SUL supported by at least one cell served by other base stations;

12. at least one neighbor cell of at least one cell served by the other base station supports indication information of the SUL.

The above information about other base stations may be transmitted from other base stations to the base station 1.

Step 2: the base station 2 sends a message 2 (configuration message carrying SUL configuration information) to the base station 1, the message containing at least one of the following information:

1. identification information of at least one cell served by the base station 2;

2. SUL configuration information for at least one cell served by base station 2, indicating that at least one cell served by base station 2 supports SUL. If none of the cells served by the base station 2 support SUL, this information is not included;

3. identification information of at least one neighbor cell of at least one cell served by the base station 2, that is, identification information of at least one neighbor cell, which is a neighbor cell of any one cell served by the base station 2;

4. SUL configuration information of at least one neighbor cell of at least one cell served by the base station 2, that is, SUL configuration information of at least one neighbor cell, which is a neighbor cell of any one cell served by the base station 2, indicates that at least one neighbor cell of at least one cell served by the base station 2 supports SUL. This information is not contained if none of the neighbor cells of the cell served by the base station 2 support SUL.

9. indication information of at least one cell supported SUL served by the base station 2;

10. at least one neighbor cell of at least one cell served by the base station 2 supports indication information of the SUL.

The above information about other base stations may be transmitted from other base stations to the base station 2. In the two steps, the message 1 and the message 2 can be EN-DC X2Setup request message and EN-DC X2Setup response message, xn Setup request message and Xn Setup response message, EN-DC Configuration update message and EN-DC Configuration update acknowledge message, xn Configuration update message and Xn Configuration update acknowledge message respectively, and can also be messages of other names.

Through the two-step interaction, each base station can be helped to know whether cells supported on other base stations support SULs and the configuration of the associated SULs.

2. Configuration information of the SUL is interacted between the central unit and the distribution unit of the base station (the distribution unit triggers), see fig. 5 (a).

Step 1: the distribution unit sends a message 3a (configuration message carrying SUL configuration information) to the concentration unit, which message contains at least one of the following information:

1. identification information of at least one cell served by the distribution unit of the base station;

2. SUL configuration information of at least one cell served by the distribution unit of the base station, the information indicating that the at least one cell served by the distribution unit supports SUL, and if none of the cells served by the distribution unit of the base station support SUL, the information is not included;

3. identification information of at least one neighbor cell of at least one cell served by the distribution unit of the base station, that is, identification information of at least one neighbor cell, the neighbor cell being a neighbor cell of any one cell served by the distribution unit of the base station;

4. SUL configuration information of at least one neighbor cell of at least one cell served by the distribution unit of the base station, that is, SUL configuration information of at least one neighbor cell, the neighbor cell being a neighbor cell of any one cell served by the distribution unit of the base station, the information indicating that at least one neighbor cell of at least one cell served by the distribution unit of the base station supports SUL, and if none of the neighbor cells of the cell served by the distribution unit of the base station support SUL, the information is not included.

9. indication information of at least one cell supporting SUL served by the distribution unit of the base station;

10. At least one neighbor cell of at least one cell served by the distribution unit of the base station supports indication information of the SUL.

The information related to the other base stations may be sent by the other base stations to the distribution unit of the base station, or may be sent to the central unit of the base station first and then to the distribution unit of the base station. Step 2: the concentrator unit feeds back a message 4a (acknowledgement message of the SUL configuration message) to the distribution unit indicating that the acknowledgement concentrator unit received the message 3a sent by the distribution unit. Further, optionally, one of the following information may be included:

1. identification information of at least one cell served by the concentration unit;

2. SUL configuration information for at least one cell served by the centralized unit, the information indicating that the at least one cell served by the centralized unit supports SUL, the information not being included if none of the cells served by the centralized unit support SUL;

3. identification information of at least one neighbor cell of at least one cell served by the centralizing unit, that is, identification information of at least one neighbor cell, the neighbor cell being a neighbor cell of any one cell served by the centralizing unit;

4. SUL configuration information of at least one neighbor cell of at least one cell served by the concentration unit, that is, SUL configuration information of at least one neighbor cell, the neighbor cell being a neighbor cell of any one cell of the concentration unit, the information indicating that the at least one neighbor cell of the at least one cell served by the concentration unit supports SUL. If none of the neighbor cells of the cells served by the centralized unit support SULs, this information is not included.

6. SUL configuration information of at least one cell served by other base stations, the information indicating that the at least one cell served by the other base stations supports SUL, and if none of the cells served by the other base stations supports SUL, the information is not included;

7. the identification information of at least one neighbor cell of at least one cell served by other base stations, that is, the identification information of at least one neighbor cell, which is a neighbor cell of any one cell served by other base stations and transmitted by the base stations or the other base stations received by the centralized unit of the base stations;

8. SUL configuration information of at least one neighbor cell of at least one cell served by other base stations, that is, SUL configuration information of at least one neighbor cell, the neighbor cell being a neighbor cell of any one cell served by other base stations transmitted by the base station or other base stations received by a centralized unit of the base station, the information indicating that the at least one neighbor cell of the at least one cell served by the other base stations supports SUL. If none of the neighbor cells of the cells served by the other base station support SULs, this information is not included.

9. Indication information of at least one cell supporting SUL served by the centralized unit;

10. at least one neighbor cell of at least one cell served by the concentration unit supports indication information of the SUL.

The information related to the other base stations may be sent by the other base stations to the central unit of the base station.

In the two steps, the messages 3a and 4a can be F1Setup request message and F1Setup response message, gNB-DU Configuration Update message and gNB-DU Configuration Update Acknowledge respectively, and can also be messages with other names.

Through the interaction of the two steps, on one hand, the centralized unit of each base station can be helped to obtain whether the cell served by the distribution unit supports SUL and related SUL configuration, and also can obtain whether the neighbor cell of the cell served by the distribution unit supports SUL and related SUL configuration; on the other hand, the distribution unit of the base station can be helped to obtain whether the cells served by other base stations support SUL and related SUL configuration, and also can obtain whether the neighbor cells of the cells served by other base stations support SUL and related SUL configuration.

3. Configuration information of the SUL is interacted between the hub unit and the distribution unit of the base station (hub unit trigger), see fig. 5 (b).

Step 1: the concentration unit sends a message 3b (request message for obtaining the SUL configuration) to the distribution unit, which message contains at least one of the following information:

6. SUL configuration information regarding at least one cell served by other base stations, the information indicating that the at least one cell served by the other base stations supports SULs, the information not being included if none of the cells served by the other base stations support SULs;

8. SUL configuration information of at least one neighbor cell of at least one cell served by other base stations, that is, SUL configuration information of at least one neighbor cell, the neighbor cell being a neighbor cell of any one cell served by other base stations transmitted by the base station or a centralized unit of the base station with respect to the other base stations, the information indicating that the at least one neighbor cell of the at least one cell served by the other base stations supports SUL, and not including the information if none of the neighbor cells of the cells served by the other base stations support SUL.

Step 2: the distribution unit feeds back a message 4b (configuration message carrying SUL configuration information) to the concentration unit indicating that it has acknowledged that the distribution unit received the message 3b sent by the concentration unit. Further, optionally, one of the following information may be included:

The information related to the other base stations may be sent by the other base stations to the distribution unit of the base station, or may be sent to the central unit of the base station first and then to the distribution unit of the base station. In the two steps, the messages 3b and 4b may be gNB-CU Configuration Update message and gNB-CU Configuration Update Acknowledge, respectively, or may be messages of other names.

Through the interaction of the two steps, on one hand, a distribution unit of the base station can be helped to obtain whether cells served by other base stations support SUL and related SUL configuration, and also can obtain whether neighbor cells of the cells served by other base stations support SUL and related SUL configuration; on the other hand, the centralized unit of each base station can be helped to obtain whether the cell served by the distribution unit supports SUL and related SUL configuration, and can also obtain whether the neighbor cell of the cell served by the distribution unit supports SUL and related SUL configuration.

Example two

For one UE, the operation between the centralized unit and the distributed unit of the base station regarding the addition/modification/release of the SUL may be implemented in one of the following ways.

Mode one: the central unit of the base station determines the addition/modification/release of the SUL, see fig. 6.

Step 1: the central unit of the base station sends a message 5 (request message for acquiring the SUL configuration) to the distribution units of the base station, at least containing information related to the SUL configuration of the cells generated by the central unit side, the information being information related to the SUL configuration of at least one cell serving the user, the information including at least one of the following information for one cell serving the user:

1. identification information of a cell, which may be PCell (Primary Cell), PSCell (Primary Secondary cell), SCell (Secondary cell) or SCG (Secondary Cell Group) SCell;

2. indication information related to the uplink carrier of the UE, which may be a displayed indication information or an implicit indication information, may be used to represent at least one of the following indication information:

(1) And configuring indication information of the non-SUL carrier for the UE. In another embodiment, the indication information may also be represented by a manner that does not include the "information related to UE uplink carrier

(2) And configuring the indication information of the SUL carrier for the UE only. In another embodiment, the indication information may also be represented by a manner that does not include the "information related to UE uplink carrier

(3) Configuring indication information of non-SUL carrier and SUL carrier for UE, or configuring indication information of SUL for UE, or activating indication information of SUL carrier, or adding indication information of SUL for UE. The indication information indicates that if the "information related to the UE uplink carrier" is not included, the non-SUL carrier is configured for the UE only by default, and if the indication information in the "information related to the UE uplink carrier" is included, the non-SUL carrier and the SUL carrier are configured for the UE. In another embodiment, the indication information may also be represented by a manner that does not include the "information related to UE uplink carrier

3. Indication information related to modifying the configuration of the uplink carrier of the UE, which may be a displayed indication information or an implicit indication information, which may be used to represent one of the following indication information:

(1) Indication information to modify configuration of SUL carrier of UE

(2) Modifying indication information of configuration of non-SUL carrier of UE

(3) Modifying indication information of configuration of SUL carrier and non-SUL carrier of UE

4. Configuring indication information of random access related information (cell-specific and/or UE-specific) on SUL for UE

5. Modifying for a UE indication information of random access related information (cell-specific and/or UE-specific) on a SUL

The cell serving the user for which the above information is directed may be, in one embodiment, a cell newly added for the user; in another embodiment, it may be a cell of an existing service user.

2. Information about the measurement results of the cell, which may include at least one of the following information:

1. identification information of the cell;

2. signal strength information (RSRP) of a cell, or signal quality information (RSRQ), or signal-to-interference and noise ratio information (SINR), etc.;

3. measurement information about the SSB (Synchronization Signal block, synchronization signal block, including PSS, SSS, PBCH) of a cell, which may be obtained by measuring signals (e.g. PSS, SSS, PBCH, DM-RS, CSI-RS) in the signal block, may include at least one of the following information:

(1) Identification information of at least one synchronization signal block, further, the identification information can be used to indicate position information of the synchronization signal block

(2) Measurement of the at least one synchronization signal block, e.g. RSRP, RSRQ, SINR, etc

(3) Identification information of at least one suitable synchronization signal block selected by the UE, further, the identification information may be used to indicate location information of the synchronization signal block

(4) Measurement results of at least one suitable synchronization signal block selected by the UE, e.g. RSRP, RSRQ, SINR, etc

In addition, the information related to the measurement result of the cell may also include measurement results of other cells that do not serve the user.

Step 2: the distribution unit of the base station sends a message 6 (configuration message carrying SUL configuration information) to the concentration unit of the base station, the message 6 being a response message to the message 5 in step 1, and containing at least information on SUL configuration of cells generated at the distribution unit side, the information being information on SUL configuration of at least one cell serving a user, the information including at least one of the following information for one cell serving the user:

1. identification information of the cell;

2. indication information related to the uplink carrier of the UE, which may be a displayed indication information or an implicit indication information, may be used to represent one of the following indication information:

(1) Indication information to modify configuration of SUL carrier of UE

(2) Modifying indication information of configuration of non-SUL carrier of UE

5. Modifying indication information 6 of random access related information (cell-specific and/or UE-specific) on the SUL and configuration information of SUL carrier of the cell for the UE;

7. the configuration information of the non-SUL of the cell, wherein the configuration parameters possibly included in the configuration information can refer to the configuration parameters included in the configuration information of the SUL;

the cell serving the user for which the above information is directed may be, in one embodiment, a cell newly added for the user; in another embodiment, it may be one cell for an existing service user. The information related to SUL configuration may be generated by the distribution unit according to the message of step 1, or may be determined by the distribution unit

Before step 1, there may be an optional step 0, in which the central unit of the base station receives information related to the measurement result of the cell reported by the UE, where the information is sent to the distribution unit by the UE, and then sent to the central unit by the distribution unit, or received by the central unit of the base station from other base stations. The information on the measurement result of the cell includes at least one of the following information (the cell included in the information may not be a serving cell of the user):

1. Identification information of the cell;

3. measurement information about a synchronization signal block (SSB: synchronization Signal block) of a cell, which includes PSS, SSS, PBCH, which may be obtained by measuring signals (e.g., PSS, SSS, PBCH, DM-RS, CSI-RS) in the signal block, may include at least one of the following information:

After step 2, optionally, step 3 may be further included, that is, the central unit of the base station sends the configuration information received in step 2 to the UE, and may send the configuration information to the UE through the distribution unit, or may send the configuration information to other base stations, and then send the configuration information to the UE through other base stations.

The above steps 1 and 2 may be applied to a UE context establishment procedure between the centralized unit and the distributed unit, or a UE context modification procedure initiated by the centralized unit, or other procedures. Message 5 and message 6 may be UE Context Setup Request message and UE Context Setup response message, UE Context Modification Request message and UE Context Modification Response message, respectively, or may be other names of messages.

Through the interaction of the two steps, the distribution unit of the base station can be helped to generate non-SUL carrier wave and/or SUL carrier wave configuration for the UE, and finally the configuration is sent to the UE.

This approach can be extended to the addition/modification/release of the SUL of the UE initiated by base station 1, between two base stations (base station 1 and base station 2), which interface between these two base stations can be X2/Xn, or other interfaces. The specific method is similar to the above description, namely, the centralized unit in the step 1 and the step 2 is modified to be the base station 1, and the distributed unit is modified to be the base station 2. For step 0, the base station 1 may acquire cell measurement information reported by the UE, where the cell measurement information may be referred to above, and the measurement information may be reported by the UE or may be sent by other base stations. For step 3, the configuration information of the UE may be sent to the UE through the base station 1 or the base station 2. The interaction between the two base stations can be applied to a handover procedure, wherein the messages 5 and 6 in the steps 1 and 2 are Handover Request message and Handover Request Acknowledge message respectively, and can also be applied to a dual-connection establishment procedure, the messages 5 and 6 in the steps 1 and 2 are S-Node Addition Request and S-Node Addition Request Acknowledge respectively, or SgNB Addition Request message and SgNB Addition Request Acknowledge message respectively, and can also be applied to a dual-connection modification procedure, and the messages 5 and 6 in the steps 1 and 2 are S-Node Modification Request and S-Node Modification Request Acknowledge respectively, or SgNB Modification Request message and SgNB Modification Request Acknowledge message respectively; in addition, other flows, and other messages may be employed.

In addition, for the case of initial access of the UE, if the UE selects the SUL to perform the procedure of random access, the distribution unit may send indication information to the centralized unit, where the indication information indicates that the UE selects the SUL to perform random access, and further, the indication information may indicate that the distribution unit has provided configuration information of the SUL to the centralized unit. Optionally, after receiving the indication information, the central unit may trigger the distribution unit to provide the configuration information of the SUL in the manner of step 1 and step 2. Please refer to fig. 7.

Step 0a: the distribution unit knows that the UE performs random access on the SUL. The distribution unit can determine whether to perform random access in SUL according to carrier wave for receiving random access signal

Step 0b: the distribution unit sends the indication information of random access on SUL to the centralized unit, the indication information can be sent in Initial UL RRC message or other information, and optionally, the information can also carry the configuration information of SUL

Optionally, the SUL is further configured as in step 1 and step 2 above.

Step 3: the centralized unit of the base station sends the configuration information of the SUL to the UE, and the configuration information is firstly sent to the distribution unit and then sent to the UE by the distribution unit; or sent to the UE through other base stations.

Mode two: the distribution unit of the base station determines the addition/modification/release of the SUL (the supplementary information is provided by the concentration unit), see fig. 8.

Step 1: the central unit of the base station sends a message 7 (request message for obtaining the SUL configuration) to the distribution units of the base station, the message 7 comprising at least information about the measurement results of the cells (the cells contained in this information may not be serving cells of the users), in particular at least one of the following information:

1. identification information of the cell;

Step 2: the distribution unit of the base station sends a message 8 (configuration message carrying SUL configuration information) to the concentration unit of the base station, the message 8 being a response message to the message 7 in step 1, and containing at least information on SUL configuration of cells generated at the distribution unit side, the information being information on SUL configuration of at least one cell serving a user, the information including at least one of the following information for one cell serving the user: :

1. identification information of the cell;

(1) Indication information to modify configuration of SUL carrier of UE

(2) Modifying indication information of configuration of non-SUL carrier of UE

5. Modifying indication information 6 of random access related information (cell-specific and/or UE-specific) on the SUL and configuration information of the SUL of the cell for the UE;

7. The configuration parameters possibly included in the configuration information of the non-SUL of the cell may refer to the configuration parameters included in the configuration information of the SUL.

Before step 1, there may be an optional step 0, in which the central unit of the base station receives information related to the measurement result of the cell reported by the UE, where the information is sent to the distribution unit by the UE, and then sent to the central unit by the distribution unit, or received by the central unit of the base station from other base stations. The information on the measurement result of the cell includes at least one of the following information (the cell indicated in the information may not be the serving cell of the user):

1. identification information of the cell;

In the two steps, the method can be applied to a UE context establishment flow between a centralized unit and a distributed unit, or a UE context modification flow initiated by the centralized unit, or other flows. Message 7 and message 8 may be UE Context Setup Request message and UE Context Setup response message, UE Context Modification Request message and UE Context Modification Response message, respectively, or may be other names of messages.

This approach can be extended to the addition/modification/release of the SUL decided by base station 2 between two base stations (base station 1 and base station 2), which can be X2/Xn or other interfaces. The specific method is similar to the above description, namely, the centralized unit in the step 1 and the step 2 is modified to be the base station 1, and the distributed unit is modified to be the base station 2. For the step 0, the base station 1 can acquire the cell measurement information reported by the UE, the cell measurement information can be referred to the above description, and the measurement information can be reported by the UE or sent by other base stations. For step 3, the configuration information of the UE may be sent to the UE through the base station 1 or the base station 2. The interaction between the two base stations can be applied to a handover procedure, wherein the messages 7 and 8 in the steps 1 and 2 are Handover Request message and Handover Request Acknowledge message respectively, and can also be applied to a dual-connection establishment procedure, the messages 7 and 8 in the steps 1 and 2 are S-Node Addition Request and S-Node Addition Request Acknowledge respectively, or SgNB Addition Request message and SgNB Addition Request Acknowledge message respectively, and can also be applied to a dual-connection modification procedure, and the messages 7 and 8 in the steps 1 and 2 are S-Node Modification Request and S-Node Modification Request Acknowledge respectively, or SgNB Modification Request message and SgNB Modification Request Acknowledge message respectively; in addition, other flows, and other messages may be employed.

Mode three: the distribution unit of the base station determines the addition/modification/release of the SUL, see fig. 9.

Step 1: the distribution unit of the base station sends a message 9 (configuration message carrying the SUL configuration) to the concentration unit of the base station, the message containing at least information on the SUL configuration of the cells generated at the distribution unit side, the information being information on the SUL configuration of at least one cell serving the user, the information comprising at least one of the following information for one cell serving the user: :

1. identification information of the cell;

(1) Indication information to modify configuration of SUL carrier of UE

(2) Modifying indication information of configuration of non-SUL carrier of UE

The cell serving the user for which the above information is directed may be, in one embodiment, a cell newly added for the user; in another embodiment, it may be one cell for an existing service user. The information related to the SUL configuration may be generated by the distribution unit according to the message of step 1, or may be determined by the distribution unit.

Step 2: the central unit of the base station sends a message 10 (SUL configured acknowledgement message) to the distribution units of the base station, which message 10 acknowledges the correct reception of message 9.

Before step 1, there may be an optional step 0, where the distribution unit of the base station obtains information related to the measurement result of the cell from the concentration unit, where the information may be sent to the concentration unit by the distribution unit or received by the concentration unit of the base station from other base stations. The information includes at least one of the following information (the cell contained in the information may not be the serving cell of the user):

1. identification information of the cell;

After step 2, optionally, step 3 may be further included, that is, the centralized unit of the base station sends the configuration information received in step 1 to the UE, and may send the configuration information to the UE through the distribution unit, or may send the configuration information to other base stations, and then send the configuration information to the UE through other base stations.

In the two steps, the method can be applied to a UE context modification flow initiated by a distribution unit, or other flows. Message 9 and message 10 may be UE Context Modification Required message and UE Context Modification Confirm message, respectively, or may be messages of other names.

This approach can be extended to the addition/modification/release of the SUL initiated by base station 2 between two base stations (base station 1 and base station 2), which interface between these two base stations can be X2/Xn, or other interfaces. The specific method is similar to the above description, namely, the centralized unit in the step 1 and the step 2 is modified to be the base station 1, and the distributed unit is modified to be the base station 2. For the step 0, the base station 2 can obtain the cell measurement information reported by the UE, and the cell measurement information can be referred to the above description. For step 3, the configuration information of the UE may be sent to the UE through the base station 1 or the base station 2. The interaction between the two base stations can be applied to the modification flow of the dual connection, and the messages 9 and 10 in the step 1 and the step 2 are respectively S-Node Modification Required message and S-Node Modification Confirm message, or SgNB Modification Required message and SgNB Modification Confirm message; in addition, other flows, and other messages may be employed.

Example III

Failure of the UE to connect to the network may occur, resulting in the UE being unable to communicate with a base station or with a distribution unit in a base station.

1. If the cell of the base station or the distribution unit of the base station serving the UE is a PCell (or MCG PCell), further, the cell of the base station or the distribution unit of the base station serving the UE may further include an SCell (or MCG SCell), as in fig. 10, the cause of the failure may be one of the following "cause information 1" (one embodiment may see the relevant indication information in RLF-Report in TS36.331 or TS 38.331):

1. timer timeout, such as T310 timeout, T312 timeout, one embodiment may be seen as T310-expire, T312-expire in TS36.331 or TS 38.331;

2. random access problem. An example is that the random access problem indicates that a random access failure occurs on the PCell (or MCG PCell), or that a random access failure occurs on the SCell (or MCG SCell) of the base station, an embodiment may be seen in random access probability in TS36.331 or TS 38.331;

3. the number of retransmissions of the UE RLC layer exceeds the maximum number of retransmissions of the RLC layer, one embodiment may refer to RLC-MaxNumRetx in TS36.331 or TS38.331, or indicate RLC failure;

4. The cause of a connection failure, such as a radio link failure, or a handover failure, one embodiment may be seen in connectionfailuretype in TS36.331 or TS 38.331;

2. if the cell served by the base station or the distribution unit of the base station is a PSCell (or SCG PSCell), further, the cell served by the base station or the distribution unit of the base station may also include an SCG SCell, as in fig. 11, the cause of the failure may be one of the following "cause information 2" (see for one embodiment the relevant indication information in SCGFailureInformation or FailureReportSCG-to-totherate in TS36.331 or TS 38.331):

1. timer expiration, such as T313 expiration, one embodiment may be found in T313-expiration in TS36.331 or TS 38.331;

2. random access problem. As an example, the random access problem indicates that a random access failure occurs on a PSCell (or SCG PSCell), or the random access problem indicates that a random access failure occurs on an SCG SCell, an embodiment may be seen in random access problem in TS36.331 or TS 38.331;

3. the number of retransmissions of the UE RLC layer exceeds the maximum number of retransmissions of the RLC layer, which occurs at the base station where the SCG is located, one embodiment may refer to the RLC-MaxNumRetx in TS36.331 or TS38.331, or indicate RLC failure;

4. SCG change failure, an event indicating that the UE has failed in changing the base station or the distribution unit of the base station serving the SCG, one embodiment may be seen in SCG-ChangeFaily in TS36.331 or TS 38.331;

5. beyond the maximum uplink transmission time difference, one embodiment may see maxUL-TimingDiff in TS36.331 or TS 38.331;

6. the SCG reconfiguration failure, which represents a failure occurring when the SCG of the UE is reconfigured, may be seen in SCG-reconfigFailure in TS36.331 or TS38.331 for one embodiment.

7. The signaling sent on SCG fails in integrity protection, one embodiment may be seen in srb-interfailure in TS36.331 or TS 38.331.

After introduction of the SUL, the failure may occur when the UE communicates with the network using the SUL, or may occur when the UE communicates with the network using the non-SUL, or may occur when both the SUL and the non-SUL are used. However, in the prior art, when the UE reports the failure cause, it does not indicate whether the failure occurs when using the SUL, when using the non-SUL, or when using both. Thus, the present disclosure provides the following mechanism for reporting the cause of failure.

Mechanism one: the UE reports to the network side, see fig. 12.

Step 1: the UE sends a failure report message to the network side, wherein the message contains information related to link failure and at least comprises one of the following information:

1. the reason information of the failure of the UE comprises at least one reason information of the reason information 1 and/or the reason information 2;

2. information related to the use of the SUL by the UE, which may be at least one of:

1. the UE uses the indication information of the non-SUL, in which one embodiment indicates that the UE is using the non-SUL, and in which another embodiment indicates that the UE is using the non-SUL in the process of determining that the UE fails; in another embodiment, the indication information indicates that the UE failed because of using a non-SUL; in another embodiment, the indication information indicates that the UE is using a non-SUL at a time when the UE determines that the UE fails;

2. the UE uses the indication information of the SUL, in one embodiment, the UE is instructed to use the SUL, and in another embodiment, the indication information indicates that the UE is using the SUL in the process of judging that the UE fails; in another embodiment, the indication information indicates that the UE failed due to the use of the SUL; in another embodiment, the indication information indicates that the UE is using the SUL at a time when the UE determines that the UE fails;

3. The UE uses the indication information of the SUL and the non-SUL, one embodiment is that the UE is indicated to use the SUL and the non-SUL, and the other embodiment is that the indication information indicates that the UE is using the non-SUL and the SUL in the process of judging failure; in another embodiment, the indication information indicates that the UE failed because of using the non-SUL and the SUL; in another embodiment, the indication information indicates that the UE is using the non-SUL and the SUL at the time when the UE determines that it failed.

For example, if the information reported by the UE includes: 1) Random access problem; and 2) the UE using the indication information of the SUL, indicating that the UE fails because the UE fails when performing random access on the SUL; yet another example is if the information reported by the UE includes: 1) The retransmission times of the UE RLC layer exceeds the maximum retransmission times of the RLC layer; and 2) indication information that the UE is using the SUL, it indicates that the failure of the UE occurs because the number of retransmissions of the RLC layer exceeds the maximum number of retransmissions of the RLC layer when the SUL is used for communication.

In addition, the "cause information of failure of UE" and "information related to usage of SUL by UE" may be expressed by one indication information, that is, one indication information.

In this step, there are two possible ways for the UE to report to the network:

possibility 1: after the UE fails, it reconnects to a cell (cell 2), which may be different from the cell (cell 1) served by the UE when it failed, in one embodiment, cell 1 is at a different base station, or a different distribution unit of the same base station, or the same base station as cell 2. The UE reports the information to the base station where the cell 2 is located; or the UE reports the information to a distribution unit of the base station where the cell 2 is located, and then the distribution unit reports the information to a concentration unit of the base station;

possibility 2: after the UE fails, the UE is still connected with another base station or another distribution unit of the same base station (the UE communicates with two base stations or two distribution units of one base station before the failure occurs), and the UE reports the information to the base station which still keeps the connection; or the UE reports the information to a distribution unit of the base station which still keeps connection, and then the distribution unit reports the information to a concentration unit of the base station.

Optionally, before step 1, there may be further step 0: the base station sends a failure report request message to the UE, wherein the message requests the UE to report failure cause information; or the centralized unit of the base station transmits a failure report request message to the distribution unit, and then the distribution unit transmits the request message to the UE.

Optionally, after step 1, there may be further step 2: the base station or the central unit of the base station that receives the "link failure related information" sends a failure notification message to the base station (or the central unit of the base station) where the UE fails, where the message includes some or all of the "link failure related information" may occur when the base station or the central unit of the base station that receives the "link failure related information" is different from the base station where the UE fails.

The mechanism has the effects of helping the base station to determine the uplink carrier used by the UE when failure occurs, and further helping the base station to optimize the configuration parameters of the user served by the base station and reducing the probability of failure occurrence.

Mechanism II: the distribution unit reports to the concentration unit, see fig. 13.

Step 1: the distribution unit transmits a failure report message to the concentration unit, the content of the message being generated by the distribution unit based on a failure occurring when communicating with the UE, the message containing information related to link failure, which includes at least one of the following information:

1. cause information of failure of the UE, the information including at least one of the cause information 1 and/or the cause information 2;

3. the UE uses the indication information of the SUL and the non-SUL, one embodiment is that the UE is indicated to use the SUL and the non-SUL, and the other embodiment is that the indication information indicates that the UE is using the non-SUL and the SUL in the process of judging failure; in another embodiment, the indication information indicates that the UE failed because of using the non-SUL and the SUL; in another embodiment, the indication information indicates that the UE is using the non-SUL and the SUL at the moment when the UE determines that it failed;

For example, if the reported information includes: 1) Random access problem; and 2) the UE using the indication information of the SUL, indicating that the UE fails because the UE fails when performing random access on the SUL; as yet another example, if the reported information includes: 1) The number of retransmissions of the UE RLC layer exceeds the maximum number of retransmissions of the RLC layer and 2) indication information that the UE is using the SUL indicates that the UE has failed because the number of retransmissions of the RLC layer exceeds the maximum number of retransmissions of the RLC layer when communicating using the SUL.

In addition, the "cause information of failure of UE" and "information related to usage of SUL by UE" may be represented by one indication information, i.e. one indication information

Optionally, before step 1, there may be further step 0: the centralized unit sends a failure report request message to the distribution unit, and the message requests the distribution unit to report information related to link failure;

optionally, after step 1, there may be further step 2: the centralized unit sends a failure report confirmation message to the distribution unit, wherein the message confirms that the message sent by the distribution unit in the step 1 is received; or the central unit of the base station sends a failure notification message to the base station (or the central unit of the base station) where the UE fails, wherein the message comprises part or all of the information related to the link failure

The mechanism has the effects of helping the centralized unit to determine the uplink carrier used by the UE when failure occurs, and further helping the base station to optimize the configuration parameters of the base station, wherein the parameters can be the configuration parameters required by the service user or the configuration parameters of the service cell, so that the probability of failure occurrence is reduced.

Referring to fig. 14, a network side device for supplementing uplink carrier configuration information delivery according to the present disclosure includes:

the SUL configuration information sending module is used for sending a message containing SUL configuration information to the network side entity so that the network side entity can acquire resource configuration conditions of other network entities, and still further, the network side entity can configure the SUL for the UE.

The working processes of determining the SUL configuration information module and sending the SUL configuration information module correspond to steps 101 and 102 of the supplemental uplink carrier configuration method of the present disclosure, and are not described herein.

As can be seen from the above detailed description of the present disclosure, the present disclosure has at least the following advantageous technical effects compared to the prior art:

first, through transferring the interactive SUL configuration information between the network side entities, the base station (or the centralized unit of the base station) is helped to know SUL configuration of other base stations (or the distributed units of the base station), so that the network side entity can determine whether to select a cell containing SUL for UE, and the network side entity is also helped to know resource status of other network side entities, thereby fully utilizing SUL to expand uplink coverage of the system.

Secondly, by adding/modifying/releasing SUL for UE at the network side entity, the network side can decide to trigger the network entity to configure the cell containing SUL for UE and configure SUL for UE according to the channel state of UE, and at the same time, when UE switches or configures double link for UE, the network side can also help to select proper cell and configure SUL for user.

Thirdly, optimizing configuration parameters of a network side entity according to the radio link failure information of the UE on the SUL, wherein the parameters can be configuration parameters required by a service user or configuration parameters of a service cell, so that SUL configuration of the network side and the UE side is corrected, the probability of UE communication failure is reduced, and the reliability of the system is improved.

Those skilled in the art will appreciate that the present disclosure includes reference to apparatus for performing one or more of the operations described in the present disclosure. These devices may be specially designed and constructed for the required purposes, or may comprise known devices in general purpose computers. These devices have computer programs stored therein that are selectively activated or reconfigured. Such a computer program may be stored in a device (e.g., a computer) readable medium or any type of medium suitable for storing electronic instructions and respectively coupled to a bus, including, but not limited to, any type of disk (including floppy disks, hard disks, optical disks, CD-ROMs, and magneto-optical disks), ROMs (Read-Only memories), RAMs (Random AcceSS Memory, random access memories), EPROMs (EraSable Programmable Read-Only memories), EEPROMs (Electrically EraSable Programmable Read-Only memories), flash memories, magnetic cards, or optical cards. That is, a readable medium includes any medium that stores or transmits information in a form readable by a device (e.g., a computer).

It will be understood by those within the art that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. Those skilled in the art will appreciate that these computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing method to perform the functions specified in the block diagrams and/or block or blocks of the flowchart of the present disclosure, by the processor of the computer or other programmable data processing method.

Those of skill in the art will appreciate that the various operations, methods, steps in the flow, actions, schemes, and alternatives discussed in the present disclosure may be alternated, altered, combined, or eliminated. Further, other steps, measures, schemes in various operations, methods, flows that have been discussed in this disclosure may also be alternated, altered, rearranged, split, combined, or deleted. Further, steps, measures, schemes in the prior art with various operations, methods, flows disclosed in the present disclosure may also be alternated, altered, rearranged, decomposed, combined, or deleted.

The foregoing is only a partial embodiment of the present disclosure, and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present disclosure, and such modifications and adaptations are intended to be comprehended within the scope of the present disclosure.

Claims

1. A method performed by a concentration unit CU of a base station in a wireless communication system, comprising:

receiving an initial uplink UL radio resource control, RRC, message from a distributed unit, DU, of the base station, the RRC message including SUL access indication information indicating that a user equipment, UE, has performed access on a supplementary uplink SUL;

sending an establishment request message to a DU of the base station;

receiving a setup response message from the DU of the base station in response to the setup request message, the setup response message including a UE-specific configuration associated with a physical uplink shared channel, PUSCH, on the SUL;

wherein the setup request message includes:

a first cell identity ID of a primary cell PCell or a primary secondary cell PSCell of a secondary cell group SCG;

first information indicating whether UL, SUL, or both UL and SUL are configured for the PCell or the PSCell;

a second cell ID of the secondary cell SCell; and

Second information indicating whether UL, SUL, or both UL and SUL are configured for the SCell.

2. The method of claim 1, wherein the setup response message further comprises at least one of:

identification information of a serving cell of the UE;

SUL configuration information of the service cell; or (b)

UL configuration information of the serving cell.

3. The method of claim 1, further comprising:

and sending SUL configuration information to the UE through the DU of the base station.

4. A method performed by a distributed unit, DU, of a base station in a wireless communication system, comprising:

transmitting an initial uplink UL radio resource control RRC message to a centralized unit CU of the base station, the RRC message including SUL access indication information indicating that user equipment UE has performed access on a supplementary uplink SUL;

receiving an establishment request message sent by the CU of the base station;

transmitting an establishment response message to the CU of the base station in response to the establishment request message, the establishment response message including a UE-specific configuration associated with a physical uplink shared channel, PUSCH, on the SUL;

wherein the setup request message includes:

a second cell ID of the secondary cell SCell; and

5. The method of claim 4, wherein the setup response message further comprises at least one of:

identification information of a serving cell of the UE;

SUL configuration information of the service cell; or (b)

UL configuration information of the serving cell.

6. The method of claim 4, further comprising:

and sending SUL configuration information to the UE.

7. A concentration unit CU of a base station in a wireless communication system, comprising:

a transceiver; and

at least one processor coupled with the transceiver and configured to:

sending an establishment request message to a DU of the base station;

Wherein the setup request message includes:

a second cell ID of the secondary cell SCell; and

8. The CU of claim 7, wherein the setup response message further comprises at least one of:

identification information of a serving cell of the UE;

SUL configuration information of the service cell; or (b)

UL configuration information of the serving cell.

9. The CU of claim 7, the at least one processor further configured to:

10. A distributed unit DU of a base station in a wireless communication system, the DU comprising:

a transceiver; and

at least one processor coupled with the transceiver and configured to:

Receiving an establishment request message sent by the CU of the base station;

wherein the setup request message includes:

a second cell ID of the secondary cell SCell; and

11. The DU of claim 10 wherein the setup response message further includes at least one of:

identification information of a serving cell of the UE;

SUL configuration information of the service cell; or (b)

UL configuration information of the serving cell.

12. The DU of claim 10 wherein the at least one processor is further configured to:

and sending SUL configuration information to the UE.