CN114727411A

CN114727411A - Information interaction method and equipment

Info

Publication number: CN114727411A
Application number: CN202110005376.1A
Authority: CN
Inventors: 郝悦; 江天明; 陈卓; 邓伟
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2021-01-05
Filing date: 2021-01-05
Publication date: 2022-07-08

Abstract

The invention provides an information interaction method and equipment, belonging to the technical field of wireless communication, wherein the information interaction method comprises the following steps: sending first information to a second base station or receiving the first information sent by the second base station, wherein the first information comprises at least one of RRC control information, SUL uplink RLC layer shunting data and MAC layer scheduling and HARQ time sequence; the first base station is one of a base station corresponding to an SUL carrier and a base station corresponding to a non-SUL carrier, and the second base station is the other of the base station corresponding to the SUL carrier and the base station corresponding to the non-SUL carrier. The invention defines the interactive control information and data information between the base station corresponding to the SUL carrier and the base station corresponding to the non-SUL carrier, so that the terminal can work in the scene that the SUL carrier and the non-SUL carrier do not share the same station, and the cell edge uplink performance and the user uplink throughput are improved.

Description

Information interaction method and equipment

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to an information interaction method and device.

Background

Compared with the downlink, the Uplink is easier to cover and limit, the requirement on low frequency is more urgent, 900/1800/F/A/E can be replanted to 5G, and the Uplink is enhanced by adopting a full Uplink spectrum Supplement Uplink (SUL) mode; and the existing or potential frequency of 5G, such as 4.9GHz/6 GHz/millimeter wave, etc., may be considered to adopt TDD + SUL (where TDD is Time Division multiplexing).

In the related art, a mode of binding downlink carriers and uplink carriers one by one is defined to define SUL carriers, and the SUL carriers belong to a co-sited scene based on TDD + SUL. However, at present, the network establishment cost is further reduced, and in combination with the uplink and downlink coverage differences of TDD and SUL carriers, it is very likely to deploy a TDD non-co-sited scheme in the form of SUL + N (N > ═ 1). In order to realize the non co-station scheme, the technology of inter-station interaction correlation needs to be determined.

Disclosure of Invention

In view of the above, the present invention provides an information interaction method and device, which are used to solve the problem that the technology related to inter-station interaction between the SUL carrier and the non-SUL carrier when the carriers are not co-sited is still unclear.

In order to solve the above technical problem, in a first aspect, the present invention provides an information interaction method, applied to a first base station, including:

sending first information to a second base station or receiving the first information sent by the second base station, wherein the first information comprises at least one of RRC control information, SUL uplink RLC layer shunting data and MAC layer scheduling and HARQ time sequence;

the first base station is one of a base station corresponding to an SUL carrier and a base station corresponding to a non-SUL carrier, and the second base station is the other of the base station corresponding to the SUL carrier and the base station corresponding to the non-SUL carrier.

Optionally, at least one of the RRC control information, the SUL uplink RLC layer shunted data, and the MAC layer scheduling and HARQ timing includes: at least one of system information, information in the random access process, paging information, location update information, RRC recovery related information, uplink and downlink scheduling HARQ timing, uplink control information, SUL uplink channel quality related information, SUL uplink RLC layer shunting data, uplink power control information, radio link monitoring information and mobility management information.

Optionally, the sending first information to a second base station or receiving the first information sent by the second base station includes:

and sending the first information to the second base station or receiving the first information sent by the second base station through an NG interface and/or an Xn interface.

Optionally, the system message includes information related to SUL channel configuration, where the SUL channel includes at least one of PUCCH, PUSCH, and PRACH.

Optionally, a distance between the first base station and the second base station is smaller than a preset value, where the preset value is determined according to a length of a cyclic prefix.

Optionally, the first base station is a base station corresponding to the non-SUL carrier;

the method further comprises the following steps:

and sending the timing advance to the terminal.

Optionally, the timing advance is a larger one of the first timing advance and the second timing advance;

alternatively, the first and second electrodes may be,

the timing advance comprises a first timing advance and a second timing advance;

the first timing advance is a timing advance corresponding to the SUL carrier, and the second timing advance is a timing advance corresponding to the non-SUL carrier.

Optionally, the method further includes:

and receiving capability information reported by a terminal, wherein the capability information is used for indicating whether the terminal supports a plurality of timing advance groups and/or the number of the timing advance groups supported by the terminal.

Optionally, the terminal is a terminal supporting carrier aggregation CA and/or dual connectivity DC, where the dual connectivity includes dual connectivity NR-DC of a new wireless NR system, EN-DC using a long term evolution LTE base station as a master station and a new wireless base station as an auxiliary station, and NE-DC using the new wireless base station as a master station and a long term evolution base station as an auxiliary station.

Optionally, for terminals supporting EN-DC and/or NE-DC, the capability information indicates the number of timing advance groups for the NR cell group, and the number of timing advance groups for the master cell group for LTE is indicated by LTE timing advance group capability information;

for the NR CA/NR-DC frequency band combination, if the frequency band combination comprises more than one frequency band item, the terminal supports different timing advances on different frequency band items; if not, the terminal supports only one timing advance group for the NR portion;

for terminals supporting NR-DC, multiple timing advance groups are supported.

In a second aspect, the present invention further provides a first base station, including:

the information interaction module is used for sending first information to a second base station or receiving the first information sent by the second base station, wherein the first information comprises at least one of RRC control information, SUL uplink RLC layer shunting data and MAC layer scheduling and HARQ time sequence;

Optionally, the information interaction module is configured to send the first information to the second base station or receive the first information sent by the second base station through an NG interface and/or an Xn interface.

the first base station further comprises:

and the sending module is used for sending the timing advance to the terminal.

alternatively, the first and second electrodes may be,

Optionally, the first base station further includes:

a receiving module, configured to receive capability information reported by a terminal, where the capability information is used to indicate whether the terminal supports multiple timing advance groups and/or a number of the timing advance groups supported by the terminal.

for terminals supporting NR-DC, multiple timing advance groups are supported.

In a third aspect, the present invention further provides a first base station, including: a transceiver and a processor;

the transceiver is configured to send first information to a second base station or receive the first information sent by the second base station, where the first information includes at least one of RRC control information, SUL uplink RLC layer offload data, and MAC layer scheduling and HARQ timing;

Optionally, the transceiver is configured to send the first information to the second base station or receive the first information sent by the second base station through an NG interface and/or an Xn interface.

the transceiver is further configured to send a timing advance to the terminal.

alternatively, the first and second electrodes may be,

Optionally, the transceiver is further configured to receive capability information reported by a terminal, where the capability information is used to indicate whether the terminal supports multiple timing advance groups and/or the number of timing advance groups supported by the terminal.

for terminals supporting NR-DC, multiple timing advance groups are supported.

In a fourth aspect, the present invention further provides a first base station, including a memory, a processor, and a program stored in the memory and executable on the processor; the processor implements the steps of any of the above-described information interaction methods when executing the program.

In a ninth aspect, the present invention further provides a readable storage medium, on which a program is stored, where the program is executed by a processor to implement the steps in any of the above-mentioned information interaction methods.

The technical scheme of the invention has the following beneficial effects:

the embodiment of the invention defines the interactive control information and data information between the base station corresponding to the SUL carrier and the base station corresponding to the non-SUL carrier, so that the terminal can work in the scene that the SUL carrier and the non-SUL carrier do not share the same station, and the cell edge uplink performance and the user uplink throughput are improved.

Drawings

Fig. 1 is a schematic flowchart of an information interaction method according to a first embodiment of the present invention;

fig. 2 is a schematic view of a non-co-sited scenario of an SUL carrier and a non-SUL carrier in an embodiment of the present invention;

fig. 3 is one of schematic diagrams illustrating information interaction between an Xn interface of non-co-sited SUL carrier and non-SUL carrier in the embodiment of the present invention;

fig. 4 is a second schematic diagram illustrating information interaction between the non-co-sited Xn interfaces of the SUL carrier and the non-SUL carrier according to the embodiment of the present invention;

fig. 5 is a schematic diagram of timing advance adjustment in the embodiment of the present application;

FIG. 6 is a diagram illustrating another timing advance adjustment in an embodiment of the present application;

fig. 7 is a schematic structural diagram of a first base station according to a second embodiment of the present invention;

fig. 8 is a schematic structural diagram of a first base station according to a third embodiment of the present invention;

fig. 9 is a schematic structural diagram of a first base station in a fourth embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.

Referring to fig. 1, fig. 1 is a schematic flow chart of an information interaction method according to an embodiment of the present invention, where the method is applied to a first base station, and includes the following steps:

step 11: transmitting first information to a second base station or receiving the first information transmitted by the second base station, where the first information includes at least one of Radio Resource Control (RRC) information, SUL uplink Radio Link Control (RLC) layer split data, and Media Access Control (MAC) layer scheduling and Hybrid Automatic Repeat reQuest (HARQ) timing; the SUL uplink RLC layer shunted data may also be referred to as RLC layer uplink shunted data;

the first base station is one of a base station corresponding to an SUL carrier and a base station corresponding to a non-SUL (i.e., NSUL) carrier (or referred to as an UL carrier), and the second base station is the other of the base station corresponding to the SUL carrier and the base station corresponding to the non-SUL carrier. The non-SUL carriers may be, for example, TDD carriers.

The above information interaction method is exemplified below.

Optionally, at least one of the RRC Control Information (that is, RRC Control signaling), the SUL Uplink RLC layer shunted data, and the MAC layer scheduling and HARQ timing includes at least one of a system message, a message in a random access process, a paging message, location update Information, RRC recovery (resume) related Information, an Uplink and downlink scheduling HARQ timing, Uplink Control Information (UCI), SUL Uplink channel quality related Information, SUL Uplink RLC layer shunted data, Uplink power Control Information, Radio Link Monitoring (RLM) Information, and mobility management Information.

In the first information, the system message, the message in the random access process, the paging message and/or the location update information are information which needs to be interacted between the first base station and the second base station when the terminal works in an idle state. In the first information, at least one of an uplink and downlink scheduling HARQ timing sequence, uplink control information, SUL uplink channel quality information, SUL uplink RLC layer split data, uplink power control information, radio link monitoring information, and mobility management information is information that needs to be interacted between the first base station and the second base station when the terminal is in a connected state.

The SUL uplink channel quality related information includes a channel Sounding Reference Signal (SRS) and/or a Signal to Interference plus Noise Ratio (SINR).

In the embodiment of the present invention, each message that needs to be interacted between the first base station and the second base station, for the RRC control signaling, the RLC layer uplink split data, and the MAC layer scheduling and HARQ timing, introduces an interaction delay relative to a common indoor Baseband processing Unit (BBU) and a common Baseband board, thereby affecting scheduling and performance. Specifically, the timeliness of inter-station interaction may affect the scheduling timing, transmission and processing delay of the base station, and may cause performance loss due to the problem of too large interaction delay (refer to that the maximum performance of LTE cross-station Carrier Aggregation (CA) is reduced by about 30%, or the setting of the K1/K2 parameter is too large, and the HARQ process is limited and cannot be scheduled fully). The transmission delay is affected by a transmission architecture (for example, whether a centralized-Radio Access Network (C-RAN) is provided or not) deployed between the base stations, a node position, a node number, a transmission load, and the like, and there is a potential possibility that a low-delay characteristic cannot be supported (for example, a mini slot).

Under the non-co-sited scene of the base station corresponding to the SUL carrier and the base station corresponding to the non-SUL carrier, because the interaction of control information and data information needs to be carried out, the bandwidth of an NG interface and/or an Xn interface has higher requirements, and therefore transmission transformation and interface upgrading need to be carried out.

That is, the first base station and the second base station may exchange the first information through the NG interface, may also exchange the first information through the Xn interface, and may also simultaneously use the NG interface and the Xn interface to exchange the first information.

The NG interface is an interface between the base station and the core network, that is, the first base station and the second base station may interact with the first information through the core network.

Optionally, the system message includes information related to a SUL Channel configuration, where the SUL Channel includes at least one of a Physical Uplink Control Channel (PUCCH), a Physical Uplink Shared Channel (PUSCH), and a Physical Random Access Channel (PRACH). In other words, the system message includes the SUL channel configuration PUCCH/PUSCH and the access PRACH related configuration.

Referring to fig. 2, an example of an interaction process of control information and data information between a base station corresponding to an SUL carrier (frequency band) and a base station corresponding to a TDD carrier (4.9GHz frequency band) in a non co-sited scenario is described below. Referring to fig. 3 and 4, assuming that the subcarrier intervals of the SUL and the TDD carrier are the same, if the terminal receives downlink data in the N slot of the B station, the PUCCH feedback position, K1 parameter and related information are determined by the MAC layer interactive scheduling and HARQ information of the B station → a station, and feedback ACK/NACK is sent to the a station in the N + K1 slot, where the K1 parameter configuration is flexibly configurable by 0-15, but the B station → a station interactive delay still needs to be considered; conversely, if the terminal receives DCI control information containing uplink scheduling in the B station in the N time slot, the PUSCH sending position, the K2 parameter and the related information of the A station are determined through interactive scheduling and HARQ information of the MAC layer of the B station → the A station, uplink PUSCH data is sent to the A station in the N + K2 time slot, and split data is transmitted from the A station to the B station through the RLC layer, wherein the K2 parameter configuration can be flexibly configured by 0-15, but the interactive delay of the B station → the A station still needs to be considered. From non-co-station deployment, the problem of excessive interaction delay still needs to be avoided as much as possible, otherwise, the problem that the supported parameter configuration of K1/K2 cannot be obtained or the HARQ process is limited may result.

Optionally, a distance between the first base station and the second base station is smaller than a preset value, where the preset value is determined according to a length of a Cyclic Prefix (CP).

If the distance between the first base station and the second base station exceeds the CP coverage, the SUL scheme is not recommended to be started.

For example, the frequency bands of the first base station and the second base station are respectively 4.9GHz and 2.3GHz, when the CP length is 2.4-2.6 μ s @30kHz, the distance between the first base station and the second base station is required to be controlled within 720-780 m, the distance outside 720-780 m exceeds the CP coverage, and the ratio of the overlapping area of the 4.9GHz uplink coverage and the 2.3GHz uplink coverage is low, and it is not suggested to start the SUL scheme.

In addition, the distance between the first base station and the second base station is small, and the transmission delay of the first information can be reduced.

the method further comprises the following steps:

and sending Timing Advance (TA) to the terminal.

For a terminal in an SUL scene of an unconcealed station, a first base station and a second base station respectively measure TA (timing advance) of the terminal residing on an SUL carrier or a non-SUL carrier, and a base station corresponding to the non-SUL carrier sends a TAC (cell identity indicator) adjustment amount through a downlink carrier.

In an optional specific embodiment, the timing advance is a larger one of the first timing advance and the second timing advance; the first timing advance is a timing advance corresponding to the SUL carrier, and the second timing advance is a timing advance corresponding to the non-SUL carrier.

In the embodiment of the application, the same TA is adopted for adjustment aiming at the problem of inconsistent TA introduced by different paths from a terminal to a base station corresponding to a non-SUL carrier and a base station corresponding to an SUL carrier, and when the SUL carrier is earlier than the non-SUL carrier, the TA delay amount is adjusted according to the measurement result of the SUL carrier; otherwise, the TA delay amount is adjusted according to the non-SUL carrier measurement result.

In the related art, a TA advance mechanism is introduced to align the time of information sent by different terminals in a cell to a base station side. Referring to the upper half of fig. 5 and 6, for the scenario where the SUL carrier and the non-SUL carrier do not co-operate, due to the different paths from the terminal to the base station corresponding to the SUL carrier and the base station corresponding to the non-SUL carrier, when the terminal performs scheduling and data transmission on the non-co-operate SUL carrier or the non-SUL carrier, the transmission time of a certain carrier has a certain amount of advance compared with the reception window set by the base station using another carrier, which may cause part of the valid data in the OFDM symbol to be truncated. Referring to the lower half of fig. 5 and fig. 6, the TA is determined by the TA determining method provided in the embodiment of the present application.

In another optional specific embodiment, the timing advance includes a first timing advance and a second timing advance;

In the embodiment of the application, aiming at the problem of inconsistent TA introduced by different paths from a terminal to a base station corresponding to a non-SUL carrier and a base station corresponding to a SUL carrier, different TA are adopted to adjust based on the measurement results of the SUL carrier and the non-SUL carrier respectively.

Optionally, the method further includes:

receiving capability information reported by a terminal, where the capability information is used to indicate whether the terminal supports multiple Timing Advance Groups (TAGs) and/or the number of the Timing Advance groups supported by the terminal.

In the embodiment of the application, terminal capability reporting is defined, a base station indicates the terminal to report a signal for measuring TA, and the base station supports a plurality of TAGs.

Optionally, the terminal is a terminal supporting Carrier Aggregation (CA) and/or Dual Connectivity (DC), and the Dual Connectivity includes a Dual Connectivity NR-DC of a new wireless NR system, an EN-DC using a new radio base station as a master station and an NE-DC using the new radio base station as a master station and a long term evolution base station as a slave station.

for terminals supporting NR-DC, multiple timing advance groups are supported.

Specifically, the number of timing advance groups supported by the terminal is defined as follows:

the embodiment of the invention provides a flow related to inter-station interaction and TA acquisition aiming at an SUL working mechanism (including an idle state and a connection state) in a non co-station scene. In other words, the definition of the inter-station interaction information and the perfection of the TA operation mechanism enable the SUL and non-SUL carriers (or referred to as UL carriers) to operate in a non-co-station scenario as possible.

In other optional specific embodiments, the process of sending the first information to the second base station or receiving the first information sent by the second base station may not be included, and includes: and the first base station sends the timing advance to a terminal, wherein the first base station is a base station corresponding to the non-SUL carrier. Optionally, the timing advance is a larger one of the first timing advance and the second timing advance;

alternatively, the first and second electrodes may be,

Optionally, the method further includes:

for terminals supporting NR-DC, multiple timing advance groups are supported.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a first base station according to a second embodiment of the present invention, where the first base station 70 includes:

an information interaction module 71, configured to send first information to a second base station or receive the first information sent by the second base station, where the first information includes at least one of RRC control information, SUL uplink RLC layer shunted data, and MAC layer scheduling and HARQ timing;

Optionally, the information interaction module 71 is configured to send the first information to the second base station or receive the first information sent by the second base station through an NG interface and/or an Xn interface.

Optionally, the distance between the first base station 70 and the second base station is smaller than a preset value, where the preset value is determined according to the length of the cyclic prefix.

the first base station 70 further comprises:

and the sending module is used for sending the timing advance to the terminal.

alternatively, the first and second electrodes may be,

Optionally, the first base station further includes:

a receiving module, configured to receive capability information reported by a terminal, where the capability information is used to indicate whether the terminal supports multiple timing advance groups and/or the number of timing advance groups supported by the terminal.

for terminals supporting NR-DC, multiple timing advance groups are supported.

The embodiment of the present invention is a product embodiment corresponding to the above method embodiment, and therefore, detailed description is omitted here, and please refer to the first embodiment in detail.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a first base station according to a third embodiment of the present invention, where the first base station 80 includes: a transceiver 81 and a processor 82;

the transceiver 81 is configured to send first information to a second base station or receive the first information sent by the second base station, where the first information includes at least one of RRC control information, SUL uplink RLC layer offload data, and MAC layer scheduling and HARQ timing;

Optionally, the transceiver 81 is configured to send the first information to the second base station or receive the first information sent by the second base station through an NG interface and/or an Xn interface.

the transceiver 81 is further configured to send a timing advance to the terminal.

alternatively, the first and second electrodes may be,

Optionally, the transceiver 81 is further configured to receive capability information reported by a terminal, where the capability information is used to indicate whether the terminal supports multiple timing advance groups and/or the number of timing advance groups supported by the terminal.

for terminals supporting NR-DC, multiple timing advance groups are supported.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a first base station according to a fourth embodiment of the present invention, where the first base station 90 includes a processor 91, a memory 92, and a program stored in the memory 92 and capable of being executed on the processor 91; the processor 91 implements the following steps when executing the program:

sending first information to a second base station or receiving the first information sent by the second base station, wherein the first information comprises at least one of RRC control information, SUL uplink RLC layer shunting data, MAC layer scheduling and HARQ time sequence;

Optionally, when the processor 91 executes the program, the following steps may be further implemented:

the sending first information to a second base station or receiving the first information sent by the second base station includes:

and sending the timing advance to the terminal.

alternatively, the first and second electrodes may be,

for terminals supporting NR-DC, multiple timing advance groups are supported.

The specific working process of the embodiment of the present invention is the same as that of the first embodiment of the method, and therefore, detailed description is not repeated here, and please refer to the description of the method steps in the first embodiment.

Fifth embodiment of the present invention provides a readable storage medium, where a program is stored, and when the program is executed by a processor, the method implements the steps in any one of the information interaction methods in the first embodiment. Please refer to the above description of the method steps in the corresponding embodiments.

The Base Station in the embodiment of the present invention may be a Base Transceiver Station (BTS) in Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA), a Base Station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), an evolved Node B (eNB, eNodeB) in LTE, a relay Station, an Access point, a Base Station in a future 5G network, and the like, which are not limited herein.

A terminal in embodiments of the present invention may be a wireless terminal, which may be a device that provides voice and/or other traffic data connectivity to a user, a handheld device having wireless connection capability, or other processing device connected to a wireless modem. A wireless terminal, which may be a mobile terminal such as a mobile telephone (or "cellular" telephone) and a computer having a mobile terminal, e.g., a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, may communicate with one or more core networks via a Radio Access Network (RAN), and may exchange language and/or data with the RAN. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. A wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), and a Terminal (User Device or User Equipment), which are not limited herein.

The readable storage medium includes a computer readable storage medium. Computer-readable storage media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. An information interaction method applied to a first base station is characterized by comprising the following steps:

2. The method of claim 1, wherein at least one of the RRC control information, SUL uplink RLC layer offload data, and MAC layer scheduling and HARQ timing comprises: at least one of system information, information in the random access process, paging information, location update information, RRC recovery related information, uplink and downlink scheduling HARQ timing, uplink control information, SUL uplink channel quality related information, SUL uplink RLC layer shunting data, uplink power control information, radio link monitoring information and mobility management information.

3. The method according to claim 1 or 2, wherein the transmitting the first information to the second base station or receiving the first information transmitted by the second base station comprises:

4. The method of claim 2, wherein the system message comprises SUL channel configuration related information, and wherein the SUL channel comprises at least one of PUCCH, PUSCH, and PRACH.

5. The method of claim 1, wherein a distance between the first base station and the second base station is less than a predetermined value, and wherein the predetermined value is determined according to a length of a cyclic prefix.

6. The method according to claim 1 or 5, wherein the first base station is a base station corresponding to the non-SUL carrier;

the method further comprises the following steps:

and sending the timing advance to the terminal.

7. The method of claim 6, wherein the timing advance is the greater of a first timing advance and a second timing advance;

alternatively, the first and second electrodes may be,

8. The method of claim 1, further comprising:

9. The method of claim 8, wherein the terminal is a terminal supporting Carrier Aggregation (CA) and/or Dual Connectivity (DC), and the dual connectivity comprises a dual connectivity (NR-DC) of a new wireless NR system, an EN-DC with a Long Term Evolution (LTE) base station as a primary station and a new wireless base station as a secondary station, and an NE-DC with the new wireless base station as a primary station and the long term evolution base station as a secondary station.

10. The method of claim 9, wherein for a terminal supporting EN-DC and/or NE-DC, the capability information indicates a number of timing advance groups for a NR cell group, the number of timing advance groups for a master cell group for LTE being indicated by LTE timing advance group capability information;

for terminals supporting NR-DC, multiple timing advance groups are supported.

11. A first base station, comprising:

12. A first base station, comprising: a transceiver and a processor;

13. A first base station comprising a memory, a processor and a program stored on the memory and executable on the processor; characterized in that the processor implements the steps in the information interaction method according to any one of claims 1 to 10 when executing the program.

14. A readable storage medium on which a program is stored, the program implementing the steps in the information interaction method according to any one of claims 1 to 10 when executed by a processor.