WO2018024029A1

WO2018024029A1 - Random access method and apparatus

Info

Publication number: WO2018024029A1
Application number: PCT/CN2017/087512
Authority: WO
Inventors: 谌丽
Original assignee: 电信科学技术研究院
Priority date: 2016-08-05
Filing date: 2017-06-08
Publication date: 2018-02-08
Also published as: CN107690201A; CN107690201B

Abstract

Embodiments of the present application relate to the technical field of wireless communications, and particularly relate to a random access method and apparatus, used to solve a problem of the prior art in which a random access solution is not provided for a system having a multi-layer network structure. The embodiments of the present application comprise: determining, according to a configuration of a network apparatus, a transmission point and/or a transmission point group; and performing random access to the determined transmission point and/or transmission point group. The present invention enables random access to a determined transmission point and/or transmission point group for a terminal, thus achieving random access in a system having a multi-layer network structure.

Description

Method and device for performing random access

The present application claims priority to Chinese Patent Application No. 201610641357.7, filed on Aug. 5, 2016, entitled "A Method and Apparatus for Performing Random Access", the entire contents of which are incorporated by reference. In this application.

Technical field

The present application relates to the field of wireless communication technologies, and in particular, to a method and device for performing random access.

Background technique

The reasons for random access in Long Term Evolution (LTE) systems are as follows:

1. Access from the Radio Resource Control (RRC) idle (IDLE) state (also referred to as initial access);

2. The radio link fails to initiate RRC connection reestablishment (also a type of initial access);

3. The handover process requires random access;

4. When the terminal (UE) is in the RRC_CONNECTED state, downlink data arrives;

5. When the UE is in the RRC_CONNECTED state, uplink data arrives.

For the case of downlink data arrival and handover, if there is a dedicated preamble, non-contention random access can be used. The process of non-contention random access is as shown in Figure 1, which is mainly divided into three steps:

Msg0: The base station allocates a random access preamble index (ra-Preamble Index) for non-contention random access and a random access channel (RACH) resource RACH used for random access to the UE. RACH Mask Index (ra-RACH-MaskIndex): The non-contention random access caused by the arrival of the downlink data uses the Physical Downlink Control Channel (PDCCH) to carry the information, and the non-contention random connection caused by the handover The intrusion carries this information through a handover command.

Msg1: The UE sends the designated dedicated preamble to the base station on the specified Physical Random Access Channel (RACH) resource according to the ra-PreambleIndex and the ra-RACH-MaskIndex indicated by the Msg0. After receiving the Msg1, the base station calculates the uplink timing advance TA according to Msg1.

Msg2: The base station sends a random access response to the UE, and the random access response includes timing advance information, and notifies the UE of the timing advance of the subsequent uplink transmission.

For random access caused by all other random access reasons, competitive random access can be used to compete for random access. The process is shown in Figure 2, which is divided into four steps:

Msg1: The UE selects random access preamble and RACH resources and uses the RACH resource to send the selected random access preamble to the base station;

Msg2: The base station receives the preamble, calculates the timing advance TA, and sends a random access response to the UE, where the random access response includes at least the timing advance information and an uplink grant (UL grant) for Msg3;

Msg3: The UE sends an uplink transmission on the UL grant specified by the Msg2. The content of the Msg3 uplink transmission is different for different random access reasons. For example, for the initial access, the Msg3 transmits an RRC connection establishment request.

Msg4: The contention resolution message, the UE can judge whether the random access is successful according to Msg4.

Since the 5G system introduces a new network architecture, the 5G system has the characteristics of a multi-layer network structure, so that the random access process of the LTE system cannot be directly applied to the 5G system.

In summary, there is currently no scheme for random access to a system with a multi-layer network structure.

Summary of the invention

The present application provides a method and device for performing random access, which solves the problem in the prior art that there is no solution for random access to a system with a multi-layer network structure.

A method for performing random access provided by an embodiment of the present application, where the method includes:

The terminal determines a transmission point and/or a transmission point group according to the configuration of the network side device;

The terminal performs random access with the determined transmission point and/or transmission point group.

Optionally, the terminal performs random access with the determined transmission point, including:

Sending, by the terminal, a random access request to the determined transmission point;

The terminal receives a random access response from a transmission point.

Optionally, the terminal sends a random access request to the determined transmission point, including:

The terminal sends a random access request on a random access resource that is valid at the transmission point;

The valid random access resource includes a preamble code used by the transmission point and a time-frequency resource used to carry a valid preamble code.

Optionally, the terminal performs random access with the determined transmission point group, including:

The terminal sends a random access request to the determined transmission point group;

The terminal receives a random access response from a transmission point.

Optionally, the terminal sends a random access request to the determined transmission point group, including:

The terminal sends a random access request on a random access resource that is valid for the transmission point group;

The valid random access resource includes a preamble code used by the transmission point group and is valid for carrying The time-frequency resource of the preamble code.

Optionally, the effective random access resources of all the transmission points in the transmission point group are the same; or

The effective random access resources of all transmission points in the transmission point group are all different; or

The parts of the effective random access resources of all transmission points in the transmission point group are the same.

Optionally, after receiving the random access response from the transmission point, the terminal further includes:

The terminal sends an uplink transmission scheduled by the random access response to the transmission point.

Optionally, the terminal sends an uplink transmission scheduled by the random access response to the transmission point, including:

If the terminal receives a random access response of a transmission point, the terminal sends an uplink transmission scheduled by the random access response by using the transmission resource indicated by the received random access response; or

If the terminal receives a random access response of multiple transmission points, the terminal selects one transmission point from the multiple transmission points, and sends the transmission resource indicated by the random access response from the selected transmission point. Uplink transmission of random access response scheduling.

Optionally, the terminal selects one transmission point from the multiple transmission points, including:

The terminal selects one transmission point from the plurality of transmission points according to a channel condition with a transmission point among the plurality of transmission points.

The network side device determines a transmission point and/or a transmission point group;

The network side device configures the determined transmission point and/or transmission point group for the terminal, so that the terminal and the transmission point and/or the transmission point group perform random access.

Optionally, after the network side device configures the determined transmission point for the terminal, the method further includes:

If the network side device determines a corresponding transmission point according to the random access request sent by the terminal to the transmission point, the network side device indicates random access between the transmission point and the terminal;

If the network side device cannot determine the corresponding transmission point according to the random access request sent by the terminal to the transmission point, the network side device indicates that all transmission points that receive the random access request are sent to the terminal. Random access response.

Optionally, after the network side device configures the determined transmission point group for the terminal, the method further includes:

If the network side device determines a corresponding transmission point according to the random access request sent by the terminal to the transmission point, the network side device indicates that at least one transmission point in the transmission point group sends a random access response to the terminal. ;

Receiving, by the transmission point, a random access request from the terminal, wherein the random access request is sent by the terminal to the determined transmission point and/or the transmission point group;

After receiving the indication of the network side device, the transmission point sends a random access response to the terminal.

Optionally, after the transmitting point sends the random access response to the terminal after receiving the indication of the network side device, the method further includes:

And if the transmission point receives an uplink transmission scheduled by the random access response from the terminal, the transmission point sends a contention resolution message to the terminal.

The first type of terminal for performing random access provided by the embodiment of the present application, the terminal includes:

a first determining module, configured to determine a transmission point and/or a transmission point group according to a configuration of the network side device;

And a processing module, configured to perform random access with the determined transmission point and/or the transmission point group.

Optionally, the processing module is specifically configured to:

Sending a random access request to the determined transmission point;

Receive a random access response from the transmission point.

Optionally, the processing module is specifically configured to:

Sending a random access request on a random access resource that is valid at the transmission point;

Optionally, the processing module is specifically configured to:

Sending a random access request to the determined transmission point group;

Receive a random access response from the transmission point.

Optionally, the processing module is specifically configured to:

Sending a random access request on a random access resource that is effective for the transmission point group;

The valid random access resource includes a preamble code used by the transmission point group and a time-frequency resource used to carry a valid preamble code.

Optionally, the processing module is further configured to:

After receiving the random access response from the transmission point, the uplink transmission of the random access response scheduling is sent to the transmission point.

Optionally, the processing module is specifically configured to:

If a random access response of a transmission point is received, the uplink transmission scheduled by the random access response is sent by the received transmission resource indicated by the random access response; or

If a random access response of multiple transmission points is received, one transmission point is selected from the multiple transmission points, and the random access response scheduling is sent by the transmission resource indicated by the random access response from the selected transmission point. Uplink transmission.

Optionally, the processing module is specifically configured to:

Selecting one of the plurality of transmission points according to a channel condition with a transmission point among the plurality of transmission points.

The first network side device that performs random access, which is provided by the embodiment of the present application, where the network side device includes:

a second determining module, configured to determine a transmission point and/or a transmission point group;

And a configuration module, configured to configure the determined transmission point and/or transmission point group for the terminal, so that the terminal and the transmission point and/or the transmission point group perform random access.

Optionally, the configuration module is further configured to:

If the corresponding transmission point is determined according to the random access request sent by the terminal to the transmission point, indicating that the transmission point and the terminal perform random access;

If the corresponding transmission point cannot be determined according to the random access request sent by the terminal to the transmission point, all transmission points that have received the random access request are sent a random access response to the terminal.

Optionally, the configuration module is further configured to:

If the corresponding transmission point is determined according to the random access request sent by the terminal to the transmission point, indicating that at least one transmission point in the transmission point group sends a random access response to the terminal;

The first transmission point for random access provided by the embodiment of the present application includes:

a receiving module, configured to receive a random access request from the terminal, where the random access request is sent by the terminal to the determined transmission point and/or the transmission point group;

And a sending module, configured to send a random access response to the terminal after receiving the indication of the network side device.

Optionally, the sending module is further configured to:

If an uplink transmission of the random access response scheduling from the terminal is received, a contention resolution message is sent to the terminal.

The second terminal for performing random access provided by the embodiment of the present application includes:

A processor for reading a program in the memory, performing the following process:

Determining a transmission point and/or a transmission point group according to the configuration of the network side device; passing the transceiver with the determined transmission point and/or Or a transmission point group for random access;

A transceiver for receiving and transmitting data under the control of a processor.

Optionally, the processor is specifically configured to:

Sending a random access request to the determined transmission point through the transceiver;

A random access response from the transmission point is received by the transceiver.

Optionally, the processor is specifically configured to:

Transmitting a random access request by the transceiver on a random access resource that is effective at the transmission point;

Optionally, the processor is specifically configured to:

Sending a random access request to the determined transmission point group through the transceiver;

Optionally, the processor is specifically configured to:

Transmitting, by the transceiver, a random access request on a random access resource that is effective for the transmission point group;

Optionally, the processor is specifically configured to:

A network side device that performs random access according to the second embodiment of the present application, where the network side device includes:

Determining a transmission point and/or a transmission point group; configuring, by the transceiver, a determined transmission point and/or a transmission point group for the terminal to randomly access the terminal and the transmission point and/or the transmission point group;

Optionally, the processor is further configured to:

The second transmission point for random access provided by the embodiment of the present application includes:

Receiving, by the transceiver, a random access request from the terminal, where the random access request is sent by the terminal to the determined transmission point and/or the transmission point group; after receiving the indication of the network side device, Transceiver sends a random access response to the terminal;

Optionally, the processor is further configured to:

In the embodiment of the present application, the terminal determines a transmission point and/or a transmission point group according to the configuration of the network side device, and performs random access with the determined transmission point and/or the transmission point group. Since the terminal can perform random access with the determined transmission point and/or transmission point group, random access is realized in the system of the multi-layer network structure; the system performance is further improved.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following drawings will be briefly described in the description of the embodiments. It is obvious that the drawings in the following description are only some embodiments of the present application, Those skilled in the art can also obtain other drawings based on these drawings without paying for inventive labor.

1 is a schematic flow chart of a method for non-contention random access in the background art;

2 is a schematic flow chart of a method for competing random access in the background art;

3 is a schematic structural diagram of a system of a 5G system according to an embodiment of the present application;

4 is a schematic structural diagram of a system for performing random access according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a first terminal according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a first network side device according to an embodiment of the present application;

7 is a schematic structural diagram of a first transmission point according to an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a second terminal according to an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a second network side device according to an embodiment of the present application;

10 is a schematic structural diagram of a second transmission point according to an embodiment of the present application;

FIG. 11 is a schematic flowchart of a method for performing random access on a terminal side according to an embodiment of the present disclosure;

12 is a schematic flowchart of a method for performing random access by a network side auxiliary terminal according to an embodiment of the present application;

13 is a schematic flowchart of a method for performing random access by a transmission point auxiliary terminal according to an embodiment of the present application;

14 is a schematic diagram of a terminal performing contention random access through a transmission point according to an embodiment of the present application;

15 is a schematic diagram of a terminal performing non-contention random access through a transmission point according to an embodiment of the present application;

16 is a schematic diagram of a terminal performing contention random access through a transmission point when a network side device cannot identify a transmission point according to an embodiment of the present disclosure;

17 is a schematic diagram of a terminal performing contention random access through a transmission point group according to an embodiment of the present application;

FIG. 18 is a schematic diagram of a non-contention random access by a terminal through a transmission point group according to an embodiment of the present application;

FIG. 19 is a schematic diagram of a terminal performing contention random access by a transmission point group when a network side device cannot identify a transmission point according to an embodiment of the present disclosure.

detailed description

The solution of the embodiment of the present application can be applied to a system with a multi-layer network structure, such as a 5G system.

In the new generation of wireless network systems (5G systems), a new network architecture is introduced, as shown in Figure 3. The network side node is divided into a central unit (Central Unit, CU, or base station (NB)) and a distributed unit (DU), and the user side node is a terminal.

On the network side, a central unit controls a plurality of distributed units deployed in a certain area, and the distributed units perform air interface transmission with the terminal through a Transmission Reception Point (TRP). That is, the network side node includes a central unit and a TRP two-layer physical node to control transmission, the central unit is a central control node, and the TRP is a network-side transmission point that directly performs air interface transmission with the terminal. One or more TRPs can simultaneously serve the terminal for data transmission.

In a TRP, there may be multiple beam direction transmissions, such as Beam1, Beam2, and Beam3 in TRP4 in Figure 3. In the 5G system, the terminal can continuously transmit in the area containing multiple TRPs, maintaining the terminal context. Continuous This area does not need to be switched. The area containing multiple TRPs can be regarded as a cell.

In addition to the above-mentioned 5G system, any multi-layer network structure system can apply the solution of the embodiment of the present application.

The present application will be further described in detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, but not all embodiments. . All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

As shown in FIG. 4, the system for performing random access in this embodiment of the present application includes: a terminal 10, a network side device 20, and at least one transmission point 30.

The terminal 10 is configured to determine a transmission point and/or a transmission point group according to a configuration of the network side device, and perform random access with the determined transmission point and/or the transmission point group.

The network side device 20 is configured to determine a transmission point and/or a transmission point group; and configure the determined transmission point and/or transmission point group for the terminal to perform random access between the terminal and the transmission point and/or the transmission point group.

The transmission point 30 is used for random access with the terminal.

The terminal in the embodiment of the present application performs random access with the determined transmission point, and may also perform random access with the determined transmission point group, which are respectively introduced below.

Case 1: The terminal performs random access with the determined transmission point.

Random access for the first case can be classified into competitive random access and non-contention random access.

First, non-competitive random access.

1. After determining the transmission point, the terminal sends a random access request (also referred to as Msg1) to the determined transmission point.

Optionally, the terminal may send a random access request on a random access resource that is valid at the transmission point;

2. The transmission point receives a random access request from the terminal.

After receiving the random access request from the terminal, the network side device determines whether the transmission point can be uniquely identified according to the random access request received by the transmission point (such as a specific preamble code group and/or a specific time-frequency resource and a specific transmission). Point binding, which can uniquely identify the transmission point according to the specific preamble code group and/or the specific time-frequency resource corresponding to the received random access request.

If the network side device determines a corresponding transmission point according to the random access request sent by the terminal to the transmission point, The network side device instructs the transmission point to perform random access with the terminal, that is, the determined transmission point sends a random access response (also referred to as Msg2) to the terminal and performs a subsequent random access procedure with the terminal;

If the network side device cannot determine the corresponding transmission point according to the random access request sent by the terminal to the transmission point, the network side device cannot identify whether the multiple transmission point receives a random access request or multiple transmissions sent by one terminal. The network side device separately receives a random access request sent by a different terminal, and the network side device allows multiple transmission points that correctly receive the random access request to send a random access response to the terminal, that is, the network side device indicates that the random access is received. All transmission points of the access request send a random access response to the terminal.

3. The terminal receives a random access response from a transmission point.

Second, competitive random access.

2. The transmission point receives a random access request from the terminal.

If the network side device determines a corresponding transmission point according to the random access request sent by the terminal to the transmission point, the network side device indicates random access between the transmission point and the terminal, that is, indicates the determined transmission. The point sends a random access response (also referred to as Msg2) to the terminal and performs a subsequent random access procedure with the terminal;

3. The terminal receives a random access response from a transmission point.

4. The terminal sends an uplink transmission (also referred to as Msg3) of the random access response scheduling to the transmission point.

Here, the terminal will receive a random access response of one or more transmission points.

If the terminal receives a random access response of a transmission point, the terminal sends an uplink transmission scheduled by the random access response by using the transmission resource indicated by the received random access response.

Optionally, the terminal selects one transmission point from the multiple transmission points according to a channel condition between the transmission points in the multiple transmission points.

For example, the terminal may determine channel conditions between the transmission points in the plurality of transmission points according to information such as channel measurement status, load indication, and the like of the transmission points, and select a transmission point.

In an implementation, the terminal may select one transmission point from the plurality of transmission points according to a channel condition between each of the plurality of transmission points;

The transmission point may also be selected after the channel condition between the terminal and a transmission point satisfies the requirement (such as the channel quality is greater than a set threshold), and the channel state with other transmission points is no longer determined.

In the case that the terminal performs random access with a transmission point, the uplink transmission resource scheduled by the random access response and sent by the random access response is at the same transmission point. In this way, if multiple transmission points receive a random access request sent by a terminal, the terminal only selects one of the random access responses to send the uplink transmission scheduled by the random access response. If multiple transmission points receive random access requests from different terminals, the random access response of different transmission points indicates different resources, and different terminals send the resources indicated by the random access response received by themselves. The uplink transmission of the random access response scheduling can distinguish different terminals based on different resources.

5. The transmission point receives an uplink transmission from a random access response schedule of the terminal.

If the terminal identifier is stored on the transmission point, the transmission point of the uplink transmission that receives the random access response scheduling may identify the terminal that transmits the uplink transmission scheduled by the random access response according to the stored terminal identifier, and perform a contention resolution decision.

If the terminal identification information is not stored on the transmission point, the transmission point sends the uplink transmission of the random access response scheduling to the network side device, and the network side device performs a contention resolution decision.

6. After the contention resolution decision is completed, the transmission point sends a contention resolution message (also referred to as Msg4) to the terminal.

The transmission point for transmitting the contention resolution message to the terminal may be the transmission point of the uplink transmission scheduled to receive the random access response in step 5, or may not be. For example, the network side device may instruct a transmission point to send a contention resolution message to the terminal.

Case 2: The terminal performs random access with the determined transmission point group.

Random access for the second case can be classified into competitive random access and non-contention random access.

First, non-competitive random access.

1. After determining the transmission point group, the terminal sends a random access request (also referred to as Msg1) to the determined transmission point group.

Optionally, the terminal may send a random access request on the random access resource that is valid in the transmission point group;

The preamble code used by the transmission point group is a preamble code used by all transmission points in the transmission point group;

The time-frequency resource used by the transmission point group to carry the valid preamble code is a time-frequency resource corresponding to all transmission points in the transmission point group for carrying the effective preamble code.

In an implementation, the effective random access resources of all transmission points in the transmission point group are the same; or

2. The transmission point receives a random access request from the terminal.

If the network side device determines a corresponding transmission point according to the random access request sent by the terminal to the transmission point, the network side device indicates that at least one transmission point in the transmission point group sends a random access response to the terminal. (Also called Msg2).

The transmission point indicated by the network side device may be different from the transmission point of the received random access request.

In an implementation, the network side device may select the terminal according to the channel condition between the transmission point and the terminal and whether the subsequent transmission service can be provided for the terminal, and indicate the selected terminal.

For example, the network side device may determine the channel condition between the terminal and the transmission point in the transmission point group according to the channel measurement status, the load indication, and the like of the transmission point, and select a transmission point with a good channel condition.

For example, if the transmission point can correctly receive the random access request, it is determined that the transmission point channel condition is good.

For example, the channel condition between the terminal and the transmission point in the transmission point group can be determined according to the terminal channel quality measurement report, and the transmission point with good channel condition is selected.

When determining whether the terminal can provide the subsequent transmission service, the terminal may perform the determination according to whether the transmission point has sufficient resources for the terminal to perform random access and data transmission, and if there are sufficient resources, determine that the terminal can provide the subsequent transmission service; otherwise It is determined that the terminal cannot provide subsequent transmission services.

It is also determined according to the load of the transmission point. If the load of the transmission point is less than the threshold, it is determined that the terminal can provide the subsequent transmission service; otherwise, it is determined that the terminal cannot provide the subsequent transmission service.

The network side device may instruct a transmission point to send a random access response for the terminal; or may indicate that multiple transmission points are in the A random access response is sent to the terminal jointly on the same time-frequency resource. Regardless of whether a transmission point or multiple transmission points send a random access response, the terminal determines the corresponding resource according to the random access response indication.

If the network side device cannot determine the corresponding transmission point according to the random access request sent by the terminal to the transmission point group, the network side device cannot identify whether the multiple transmission point receives the random access request sent by one terminal or multiple The transmission point respectively receives the random access request sent by the different terminal, and the network side device allows multiple transmission points that correctly receive the random access request to send a random access response to the terminal, that is, the network side device indicates that the network access device receives the All transmission points of the random access request send a random access response to the terminal.

3. The terminal receives a random access response from a transmission point.

Second, competitive random access.

2. The transmission point receives a random access request from the terminal.

The network side device may indicate that one transmission point sends a random access response for the terminal, and may also indicate that multiple transmission points jointly send a random access response to the terminal on the same time-frequency resource. Regardless of whether a transmission point or multiple transmission points send a random access response, the terminal determines the corresponding resource according to the random access response indication.

3. The terminal receives a random access response from a transmission point.

In the case where the terminal performs random access with a transmission point group, the resource indicated by the received random access response may be It is also possible to be at different transmission points on the same transmission point. Optionally, if multiple transmission points receive a random access request sent by one terminal, multiple random access responses of different transmission points may indicate the same resource (ie, joint transmission); if multiple transmission points are received separately To random access requests sent from different terminals, random access responses of different transmission points will indicate different resources, thereby finally distinguishing the terminals.

The network side device in the embodiment of the present application may be a base station (such as a macro base station, a home base station, etc.), and may also be other network side devices.

As shown in FIG. 5, the first terminal in this embodiment of the present application includes:

a first determining module 500, configured to determine a transmission point and/or a transmission point group according to a configuration of the network side device;

The processing module 501 is configured to perform random access with the determined transmission point and/or the transmission point group.

Optionally, the processing module 501 is specifically configured to:

Sending a random access request to the determined transmission point;

Receive a random access response from the transmission point.

Optionally, the processing module 501 is specifically configured to:

Sending a random access request to the determined transmission point group;

Receive a random access response from the transmission point.

Optionally, the processing module 501 is specifically configured to:

Optionally, the processing module 501 is further configured to:

Optionally, the processing module 501 is specifically configured to:

As shown in FIG. 6, the first network side device in this embodiment of the present application includes:

a second determining module 600, configured to determine a transmission point and/or a transmission point group;

The configuration module 601 is configured to configure the determined transmission point and/or transmission point group for the terminal to perform random access between the terminal and the transmission point and/or the transmission point group.

Optionally, the configuration module 601 is further configured to:

As shown in FIG. 7, the first transmission point in this embodiment of the present application includes:

The receiving module 700 is configured to receive a random access request from the terminal, where the random access request is sent by the terminal to the determined transmission point and/or the transmission point group;

The sending module 701 is configured to send a random access response to the terminal after receiving the indication of the network side device.

Optionally, the sending module 701 is further configured to:

As shown in FIG. 8, the second terminal in this embodiment of the present application includes:

The processor 801 is configured to read a program in the memory 804 and perform the following process:

According to the configuration of the network side device, the transmission point and/or the transmission point group are determined; the transceiver 802 performs random access with the determined transmission point and/or the transmission point group.

The transceiver 802 is configured to receive and transmit data under the control of the processor 801.

Optionally, the processor 801 is specifically configured to:

Sending a random access request to the determined transmission point;

Receive a random access response from the transmission point.

Optionally, the processor 801 is specifically configured to:

Sending a random access request to the determined transmission point group;

Receive a random access response from the transmission point.

Optionally, the processor 801 is specifically configured to:

Optionally, the processor 801 is further configured to:

Optionally, the processor 801 is specifically configured to:

In the implementation, the interaction between the processor 801 and the network side is implemented by the transceiver 802, and will not be separately described herein.

In FIG. 8, a bus architecture (represented by bus 800), bus 800 may include any number of interconnected buses and bridges, and bus 800 will include one or more processors and memory 804 represented by general purpose processor 801. The various circuits of the memory are linked together. The bus 800 can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art, and therefore, will not be further described herein. Bus interface 803 provides an interface between bus 800 and transceiver 802. Transceiver 802 can be an element or a plurality of elements, such as multiple receivers and transmitters, providing means for communicating with various other devices on a transmission medium. For example, transceiver 802 receives external data from other devices. The transceiver 802 is configured to send the processed data of the processor 801 to other devices. Depending on the nature of the computing system, a user interface 805 can also be provided, such as a keypad, display, speaker, microphone, joystick.

The processor 801 is responsible for managing the bus 800 and the usual processing, running the general purpose operating system as described above. The memory 804 can be used to store data used by the processor 801 when performing operations.

Optionally, the processor 801 can be a central buried device (CPU), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device ( Complex Programmable Logic Device, CPLD).

As shown in FIG. 9, the second network side device in this embodiment of the present application includes:

The processor 901 is configured to read a program in the memory 904 and perform the following process:

A transmission point and/or a transmission point group is determined; the determined transmission point and/or transmission point group is configured by the transceiver 902 for the terminal to randomly access the terminal and the transmission point and/or the transmission point group.

The transceiver 902 is configured to receive and transmit data under the control of the processor 901.

Optionally, the processor 901 is further configured to:

In an implementation, the interaction between the processor 901 and the terminal is implemented by the transceiver 902 and the transmission point, that is, the processor 901 sends the information that needs to be sent to the terminal to the transmission point through the transceiver 902, and the transmission point is sent to the terminal. After receiving the information from the terminal that needs to be sent to the network side device, the transmission point sends the information to the network side device, and the processor 901 receives the information through the transceiver 902.

The network side device and the transmission point can be connected by wire, wireless, or the like.

In FIG. 9, a bus architecture (represented by bus 900), bus 900 can include any number of interconnected buses and bridges, and bus 900 will include one or more processors represented by processor 901 and memory represented by memory 904. The various circuits are linked together. The bus 900 can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art, and therefore, will not be further described herein. Bus interface 903 provides an interface between bus 900 and transceiver 902. Transceiver 902 can be an element or a plurality of elements, such as a plurality of receivers and transmitters, providing means for communicating with various other devices on a transmission medium. The data processed by the processor 901 is transmitted over the wireless medium via the antenna 905. Further, the antenna 905 also receives the data and transmits the data to the processor 901.

The processor 901 is responsible for managing the bus 900 and the usual processing, and can also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. The memory 904 can be used to store data used by the processor 901 in performing operations.

Optionally, the processor 901 can be a CPU, an ASIC, an FPGA, or a CPLD.

As shown in FIG. 10, the second transmission point in this embodiment of the present application includes:

The processor 1001 is configured to read a program in the memory 1004 and perform the following process:

Receiving, by the transceiver 1002, a random access request from the terminal, where the random access request is sent by the terminal to the determined transmission point and/or the transmission point group; after receiving the indication of the network side device, A random access response is sent to the terminal by the transceiver 1002.

The transceiver 1002 is configured to receive and transmit data under the control of the processor 1001.

Optionally, the processor 1001 is further configured to:

In an implementation, the interaction between the processor 1001 and the terminal is implemented by the transceiver 1002, and the interaction between the processor 1001 and the network side device can also be implemented by the transceiver 1002. The transceiver 1002 has at least two sets of transmission modes, one of which is a way of interacting with the terminal, for example, a wireless mode, and the other is a mode of interacting with the network side device, such as a wireless mode or a wired mode.

In an implementation, the interaction between the processor 1001 and the terminal is implemented by the transceiver 1002 and the transmission point, that is, the processor 1001 sends the information that needs to be sent to the terminal to the transmission point through the transceiver 1002, and the transmission point is sent to the terminal. After receiving the information from the terminal that needs to be sent to the network side device, the transmission point sends the information to the network side device, and the processor 1001 receives the information through the transceiver 1002.

In FIG. 10, a bus architecture (represented by bus 1000), bus 1000 may include any number of interconnected buses and bridges, and bus 1000 will include one or more processors represented by processor 1001 and memory represented by memory 1004. The various circuits are linked together. The bus 1000 can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art, and therefore, will not be further described herein. Bus interface 1003 provides an interface between bus 1000 and transceiver 1002. The transceiver 1002 can be an element or a plurality of elements, such as a plurality of receivers and transmitters, providing means for communicating with various other devices on a transmission medium. The data processed by the processor 1001 is transmitted over the wireless medium via the antenna 1005. Further, the antenna 1005 also receives the data and transmits the data to the processor 1001.

The processor 1001 is responsible for managing the bus 1000 and the usual processing, and can also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. The memory 1004 can be used to store data used by the processor 1001 in performing operations.

Optionally, the processor 1001 may be a CPU, an ASIC, an FPGA, or a CPLD.

Based on the same inventive concept, the embodiment of the present application further provides a method for performing random access on the terminal side, where the device corresponding to the method is a terminal in a system for performing random access in the embodiment of the present application, and the method solves the problem. The principle is similar to the device, so the implementation of the method can be referred to the implementation of the device, and the details are not repeated here.

As shown in FIG. 11, the method for performing random access on the terminal side of the embodiment of the present application includes:

Step 1100: The terminal determines a transmission point and/or a transmission point group according to the configuration of the network side device.

Step 1101: The terminal performs random access with the determined transmission point and/or the transmission point group.

The terminal receives a random access response from a transmission point.

The valid random access resource includes a preamble preamble code used by the transmission point and a time-frequency resource used to carry a valid preamble code.

The terminal receives a random access response from a transmission point.

Based on the same inventive concept, the embodiment of the present application further provides a network side auxiliary terminal for performing random access, and the device corresponding to the method is a network side device in a system for performing random access in the embodiment of the present application, and The principle of the method for solving the problem is similar to that of the device. Therefore, the implementation of the method can be referred to the implementation of the device, and the repeated description is not repeated.

As shown in FIG. 12, the method for performing random access by the network side auxiliary terminal in this embodiment of the present application includes:

Step 1200: The network side device determines a transmission point and/or a transmission point group.

Step 1201: The network side device configures a determined transmission point and/or a transmission point group for the terminal, so that the terminal is configured. Random access with transmission points and/or transmission point groups.

Based on the same inventive concept, the embodiment of the present application further provides a method for a random access by a transmission point auxiliary terminal, where the device corresponding to the method is a transmission point in a system for performing random access in the embodiment of the present application, and The method for solving the problem is similar to the device. Therefore, the implementation of the method can be referred to the implementation of the device, and the repeated description is not repeated.

As shown in FIG. 13, the method for performing random access by the transmission point auxiliary terminal in the embodiment of the present application includes:

Step 1300: The transmission point receives a random access request from the terminal, where the random access request is sent by the terminal to the determined transmission point and/or the transmission point group.

Step 1301: After receiving the indication of the network side device, the transmission point sends a random access response to the terminal.

The solutions of the embodiments of the present application are described in detail below by way of various examples.

Embodiment 1 The terminal performs random access with a TRP (the base station can uniquely identify the TRP according to Msg1).

In the first embodiment, the base station can uniquely identify the TRP according to Msg1. There are two cases: 1) The TRP uniquely identifies Msg1. At this time, other TRPs cannot resolve Msg1 or determine that Msg1 is not sent to itself after receiving Msg1. 2) The base station can uniquely identify Msg1. TRP cannot determine whether it is based on Msg1. Own, so after the TRP reports to the base station, the base station can uniquely identify the TRP, and the random access response decision is determined by the base station.

The process for competing random access and non-contention random access is described as follows.

1. Competitive random access: See Figure 14 for details.

Terminal side:

Step 1: When determining that the random access is initiated, the terminal selects a random access resource of a TRP (such as TRP1 in FIG. 14), and sends a random access request Msg1.

Step 2: The terminal receives the random access response Msg2 under TRP1.

Step 3: The terminal sends Msg3 to TRP1 on the uplink resource indicated by Msg2.

Among them, Msg3 contains terminal identification information required for contention resolution.

Step 4: The terminal receives the contention resolution message Msg4 sent by the TRP1.

Network side:

Step 1: The TRP1 receives the random access request Msg1 sent by the terminal.

TRP1 can decide whether to reply Msg2 to the terminal, or pass Msg1 to the base station to make a random access response decision by the base station.

Step 2: The TRP1 sends a random access response Msg2, and the Msg2 includes an uplink resource allocation, and is used by the terminal to send the Msg3.

Since the node that sends Msg2 is TRP1, the uplink resource specified in Msg2 is on TRP1.

Step 3: The TRP1 receives the Msg3 sent by the terminal on the uplink resource indicated by the Msg2.

If the terminal identifier is stored on the TRP1, the TRP2 identifies the terminal according to the terminal identifier included in the Msg3 after receiving the Msg3, and performs a contention resolution decision; otherwise, the TRP1 sends the Msg3 to the NB, and the base station performs a contention resolution decision.

Step 4: Assume that the contention resolution decision is TRP1 (the competition decision here may be performed by the base station or TRP1), and the TRP1 sends a contention resolution message Msg4 to the terminal.

The contention resolution message is generated by the base station or TRP1 in step 3.

2. Non-contention random access: See Figure 15 for details.

Terminal side:

Step 0: The terminal receives the non-contention random access command Msg0 sent by the base station, and determines a TRP and a random access resource that initiate non-contention random access.

Wherein, Msg0 may be sent to the terminal by TRP1 or other TRP;

Step 1: The terminal sends a random access request Msg1 according to the random access resource indicated by Msg0 on the determined TRP (such as TRP1 in FIG. 15).

Step 2: The terminal receives the random access response Msg2 under TRP1 to complete the random access procedure.

Network side:

Step 0: The base station sends a non-contention random access command Msg0 to the terminal through the TRP.

The Msg0 includes the resources of the non-contention random access, and the sending node of the Msg0 may be the TRP1 or other TRPs (if other TRPs, the TRP corresponding to the non-contention random access resources is required to be the TRP1).

Step 1: The TRP1 receives the random access request Msg1 sent by the terminal.

Step 2: The TRP1 sends a random access response Msg2 to complete the non-contention random access procedure.

Embodiment 2: The terminal performs random access with a TRP (the network side cannot uniquely identify the TRP according to Msg1).

In the second embodiment, the network side cannot uniquely identify the TRP according to Msg1. At this time, only the random access scenario is contending. See Figure 16 for details.

Terminal side:

Step 1: When the terminal determines to initiate random access, the terminal selects a random access resource to send a random access request Msg1.

Step 2: The terminal receives the random access response Msg2. If multiple terminals are received, the terminal selects one Msg2 to reply. For example, the terminal selection responds to Msg2 on TRP1 in FIG.

Network side:

Step 1: TRP1 and TRP2 receive the random access request Msg1 sent by the terminal.

Step 2: TRP1 and TRP2 send a random access response Msg2, and Msg2 includes an uplink resource allocation, which is used by the terminal to send Msg3.

Since the base station cannot uniquely determine the TRP for the terminal, both TRP1 and TRP2 must send Msg2 to the terminal, indicating that the uplink resources of TRP1 and TRP2 are used for Msg3 transmission.

Step 3: At least one TRP receives the Msg3 sent by the terminal on the uplink resource indicated by Msg2.

Here, different TRPs may send multiple Msg2s, and only one TRP may receive Msg3; or multiple Msg3s may be received, and the base station can distinguish different terminals.

The TRP sends the Msg3 to the NB, and the base station performs a contention resolution decision.

Step 4: Assuming that the contention resolution decision is TRP1 (where the contention decision may be performed by the base station or TRP1), the TRP1 sends a contention resolution message Msg4 to the terminal.

Embodiment 3: The terminal performs random access with a TRP group (the base station can uniquely identify the TRP according to Msg1).

In the third embodiment, the base station can uniquely identify the TRP according to Msg1. There are two cases: 1) The TRP uniquely identifies Msg1. At this time, other TRPs cannot resolve Msg1 or determine that Msg1 is not sent to itself after receiving Msg1. 2) The base station can uniquely identify Msg1. TRP cannot determine whether it is based on Msg1. Own, so after the TRP reports to the base station, the base station can uniquely identify the TRP, and the random access response decision is determined by the base station.

1. Competitive random access: See Figure 17 for details.

Terminal side:

Step 1: When determining that the random access is initiated, the terminal selects a random access resource of a TRP (such as TRP1 in FIG. 17), and sends a random access request Msg1.

Step 2: The terminal receives the random access response Msg2 in a TRP group.

The TRP that sends the Msg2 may be the TRP1 or other TRP (such as the TRP2 in FIG. 17), and the uplink resource indicated in the Msg2 may be on the TRP2 or other TRP.

Step 3: The terminal sends Msg3 to the TRP in the TRP group on the uplink resource indicated by the Msg2, where the Msg3 includes terminal identification information required for contention resolution.

Step 4: The terminal receives the contention resolution message Msg4.

Network side:

Step 1: Msg1 receives the random access request Msg1 sent by the terminal.

Since the TRP group is based on random access, the base station needs to make a random access response decision.

Step 2: Assuming that the base station determines that the TRP2 is a random access response, the TRP2 sends a random access response Msg2, and the Msg2 includes an uplink resource allocation, and is used by the terminal to send the Msg3.

The uplink resource specified in Msg2 is on TRP2.

Optionally, in the random access based on the TRP group, the same Msg2 may be sent by multiple TRPs on the same resource to implement joint transmission.

Step 3: On the uplink resource indicated by Msg2, receive the Msg3 sent by the terminal.

And identify the terminal according to the terminal identifier included in Msg3.

If the terminal identifier is stored on the TRP2, the TRP2 identifies the terminal according to the terminal identifier included in the Msg3 after receiving the Msg3, and performs a contention resolution decision; otherwise, the TRP2 sends the Msg3 to the NB, and the base station performs a contention resolution decision.

Step 4: Assuming that the contention resolution decision is TRP2 (where the contention decision may be performed by the base station or TRP2), the TRP2 sends a contention resolution message Msg4 to the terminal.

2. Non-contention random access: See Figure 18 for details.

Terminal side:

Wherein, Msg0 may be sent to the terminal by TRP1 or other TRP;

Step 1: The terminal sends a random access request Msg1 according to the random access resource indicated by Msg0 on the determined TRP (such as TRP1 in FIG. 18).

Step 2: The terminal receives the random access response Msg2 in a TRP group, and the TRP that sends the Msg2 may be TRP1 or other TRP (such as TRP2 in FIG. 18) to complete the random access procedure.

Base station side:

Step 1: The TRP1 receives the random access request Msg1 sent by the terminal.

TRP1 passes Msg1 to the base station to make a random access response decision by the base station.

Step 2: Assuming that the TRP1 passes the Msg1 to the base station and the base station makes a random access response decision, and the decision is TRP2, the TRP2 sends a contention resolution message Msg4 to the terminal.

Embodiment 4: The terminal performs random access with a TRP group (the base station cannot uniquely identify the TRP according to Msg1).

In the fourth embodiment, the base station cannot uniquely identify the TRP according to Msg1. At this time, only the random access scenario is contending. See Figure 19 for details.

Terminal side:

Step 3: Step 3: The terminal sends Msg3 to TRP1 on the uplink resource indicated by Msg2.

Network side:

Since the base station cannot uniquely determine the TRP targeted by the terminal, both TRP1 and TRP2 must send Msg2 to the terminal. The uplink resources of TRP1 and TRP2 are respectively indicated for Msg3 transmission.

The TRP sends the Msg3 to the base station, and the base station performs a contention resolution decision.

In the above embodiment, the base station sends information to the terminal through TRP.

The present application has been described above with reference to block diagrams and/or flowchart illustrations of a method, apparatus (system) and/or computer program product according to embodiments of the present application. It will be understood that one block of the block diagrams and/or flowchart illustrations and combinations of blocks of the block diagrams and/or flowchart illustrations can be implemented by computer program instructions. These computer program instructions may be provided to a general purpose computer, a processor of a special purpose computer, and/or other programmable data processing apparatus to produce a machine such that instructions for execution via a computer processor and/or other programmable data processing apparatus are created for A method of implementing the functions/actions specified in the block diagrams and/or flowchart blocks.

Accordingly, the application can also be implemented in hardware and/or software (including firmware, resident software, microcode, etc.). Still further, the application can take the form of a computer program product on a computer usable or computer readable storage medium having computer usable or computer readable program code embodied in a medium for use by an instruction execution system or Used in conjunction with the instruction execution system. In the context of the present application, a computer usable or computer readable medium can be any medium that can contain, store, communicate, communicate, or transport a program for use by an instruction execution system, apparatus or device, or in conjunction with an instruction execution system, Used by the device or device.

It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit and scope of the application. Thus, it is intended that the present invention cover the modifications and variations of the present invention.

Claims

A method for performing random access, characterized in that the method comprises:

The terminal determines a transmission point and/or a transmission point group according to the configuration of the network side device;

The terminal performs random access with the determined transmission point and/or transmission point group.
The method according to claim 1, wherein the terminal performs random access with the determined transmission point, including:

Sending, by the terminal, a random access request to the determined transmission point;

The terminal receives a random access response from a transmission point.
The method of claim 2, wherein the terminal sends a random access request to the determined transmission point, including:

The terminal sends a random access request on a random access resource that is valid at the transmission point;

The valid random access resource includes a preamble preamble code used by the transmission point and a time-frequency resource used to carry a valid preamble code.
The method according to claim 1, wherein the terminal performs random access with the determined transmission point group, including:

The terminal sends a random access request to the determined transmission point group;

The terminal receives a random access response from a transmission point.
The method of claim 4, wherein the terminal sends a random access request to the determined transmission point group, including:

The terminal sends a random access request on a random access resource that is valid for the transmission point group;

The valid random access resource includes a preamble code used by the transmission point group and a time-frequency resource used to carry a valid preamble code.
The method of claim 5, wherein the effective random access resources of all transmission points in the transmission point group are the same; or

The effective random access resources of all transmission points in the transmission point group are all different; or

The parts of the effective random access resources of all transmission points in the transmission point group are the same.
The method according to claim 2 or 4, wherein after the terminal receives the random access response from the transmission point, the method further includes:

If the terminal receives a random access response of a transmission point, the terminal sends an uplink transmission scheduled by the random access response by using the transmission resource indicated by the received random access response; or

If the terminal receives a random access response of multiple transmission points, the terminal selects from the multiple transmission points A transmission point, and the uplink transmission scheduled by the random access response is transmitted by the transmission resource indicated by the random access response from the selected transmission point.
The method of claim 7, wherein the terminal selects one of the plurality of transmission points, including:

The terminal selects one transmission point from the plurality of transmission points according to a channel condition with a transmission point among the plurality of transmission points.
A method for performing random access, characterized in that the method comprises:

The network side device determines a transmission point and/or a transmission point group;

The network side device configures the determined transmission point and/or transmission point group for the terminal, so that the terminal and the transmission point and/or the transmission point group perform random access.
The method according to claim 9, wherein after the network side device configures the determined transmission point for the terminal, the method further includes:

If the network side device determines a corresponding transmission point according to the random access request sent by the terminal to the transmission point, the network side device indicates random access between the transmission point and the terminal;

If the network side device cannot determine the corresponding transmission point according to the random access request sent by the terminal to the transmission point, the network side device indicates that all transmission points that receive the random access request are sent to the terminal. Random access response.
The method according to claim 9, wherein after the network side device configures the determined transmission point group for the terminal, the method further includes:

If the network side device determines a corresponding transmission point according to the random access request sent by the terminal to the transmission point, the network side device indicates that at least one transmission point in the transmission point group sends a random access response to the terminal. ;

If the network side device cannot determine the corresponding transmission point according to the random access request sent by the terminal to the transmission point, the network side device indicates that all transmission points that receive the random access request are sent to the terminal. Random access response.
A method for performing random access, characterized in that the method comprises:

Receiving, by the transmission point, a random access request from the terminal, wherein the random access request is sent by the terminal to the determined transmission point and/or the transmission point group;

After receiving the indication of the network side device, the transmission point sends a random access response to the terminal.
The method according to claim 12, wherein after the transmission point sends the random access response to the terminal after receiving the indication from the network side device, the method further includes:

If the transmission point receives an uplink transmission scheduled by the random access response from the terminal, the transmission point is The terminal sends a contention resolution message.
A terminal for performing random access, wherein the terminal includes:

a first determining module, configured to determine a transmission point and/or a transmission point group according to a configuration of the network side device;

And a processing module, configured to perform random access with the determined transmission point and/or the transmission point group.
The terminal according to claim 14, wherein the processing module is specifically configured to:

Sending a random access request to the determined transmission point;

Receive a random access response from the transmission point.
The terminal according to claim 15, wherein the processing module is specifically configured to:

Sending a random access request on a random access resource that is valid at the transmission point;

The valid random access resource includes a preamble code used by the transmission point and a time-frequency resource used to carry a valid preamble code.
The terminal according to claim 14, wherein the processing module is specifically configured to:

Sending a random access request to the determined transmission point group;

Receive a random access response from the transmission point.
The terminal according to claim 17, wherein the processing module is specifically configured to:

Sending a random access request on a random access resource that is effective for the transmission point group;

The valid random access resource includes a preamble code used by the transmission point group and a time-frequency resource used to carry a valid preamble code.
The terminal according to claim 18, wherein effective transmission resources of all transmission points in the transmission point group are the same; or

The effective random access resources of all transmission points in the transmission point group are all different; or

The parts of the effective random access resources of all transmission points in the transmission point group are the same.
The terminal according to claim 15 or 17, wherein the processing module is further configured to:

If a random access response of a transmission point is received, the uplink transmission scheduled by the random access response is sent by the received transmission resource indicated by the random access response; or

If a random access response of multiple transmission points is received, one transmission point is selected from the multiple transmission points, and the random access response scheduling is sent by the transmission resource indicated by the random access response from the selected transmission point. Uplink transmission.
The terminal according to claim 20, wherein the processing module is specifically configured to:

Selecting one of the plurality of transmission points according to a channel condition with a transmission point among the plurality of transmission points.
A network side device that performs random access, where the network side device includes:

a second determining module, configured to determine a transmission point and/or a transmission point group;

And a configuration module, configured to configure the determined transmission point and/or transmission point group for the terminal, so that the terminal and the transmission point and/or the transmission point group perform random access.
The network side device according to claim 22, wherein the configuration module is further configured to:

If the corresponding transmission point is determined according to the random access request sent by the terminal to the transmission point, indicating that the transmission point and the terminal perform random access;

If the corresponding transmission point cannot be determined according to the random access request sent by the terminal to the transmission point, all transmission points that have received the random access request are sent a random access response to the terminal.
The network side device according to claim 22, wherein the configuration module is further configured to:

If the corresponding transmission point is determined according to the random access request sent by the terminal to the transmission point, indicating that at least one transmission point in the transmission point group sends a random access response to the terminal;

If the corresponding transmission point cannot be determined according to the random access request sent by the terminal to the transmission point, all transmission points that have received the random access request are sent a random access response to the terminal.
A transmission point for performing random access, characterized in that the transmission point comprises:

a receiving module, configured to receive a random access request from the terminal, where the random access request is sent by the terminal to the determined transmission point and/or the transmission point group;

And a sending module, configured to send a random access response to the terminal after receiving the indication of the network side device.
The transmission point according to claim 25, wherein the transmitting module is further configured to:

If an uplink transmission of the random access response scheduling from the terminal is received, a contention resolution message is sent to the terminal.
A terminal for performing random access, wherein the terminal includes:

A processor for reading a program in the memory, performing the following process:

Determining a transmission point and/or a transmission point group according to a configuration of the network side device; performing random access by the transceiver and the determined transmission point and/or transmission point group;

A transceiver for receiving and transmitting data under the control of a processor.
The terminal according to claim 27, wherein the processor is specifically configured to:

Sending a random access request to the determined transmission point through the transceiver;

A random access response from the transmission point is received by the transceiver.
The terminal according to claim 28, wherein the processor is specifically configured to:

Transmitting a random access request by the transceiver on a random access resource that is effective at the transmission point;

The valid random access resource includes a preamble code used by the transmission point and is valid for carrying The time-frequency resource of the preamble code.
The terminal according to claim 27, wherein the processor is specifically configured to:

Sending a random access request to the determined transmission point group through the transceiver;

A random access response from the transmission point is received by the transceiver.
The terminal according to claim 30, wherein the processor is specifically configured to:

Transmitting, by the transceiver, a random access request on a random access resource that is effective for the transmission point group;

The valid random access resource includes a preamble code used by the transmission point group and a time-frequency resource used to carry a valid preamble code.
The terminal according to claim 31, wherein the effective random access resources of all transmission points in the transmission point group are the same; or

The effective random access resources of all transmission points in the transmission point group are all different; or

The parts of the effective random access resources of all transmission points in the transmission point group are the same.
The terminal according to claim 28 or 30, wherein the processor is specifically configured to:

If a random access response of a transmission point is received, the uplink transmission scheduled by the random access response is sent by the received transmission resource indicated by the random access response; or

If a random access response of multiple transmission points is received, one transmission point is selected from the multiple transmission points, and the random access response scheduling is sent by the transmission resource indicated by the random access response from the selected transmission point. Uplink transmission.
The terminal according to claim 33, wherein the processor is specifically configured to:

Selecting one of the plurality of transmission points according to a channel condition with a transmission point among the plurality of transmission points.
A network side device that performs random access, where the network side device includes:

A processor for reading a program in the memory, performing the following process:

Determining a transmission point and/or a transmission point group; configuring, by the transceiver, a determined transmission point and/or a transmission point group for the terminal to randomly access the terminal and the transmission point and/or the transmission point group;

A transceiver for receiving and transmitting data under the control of a processor.
The network side device according to claim 35, wherein the processor is further configured to:

If the corresponding transmission point is determined according to the random access request sent by the terminal to the transmission point, indicating that the transmission point and the terminal perform random access;

If the corresponding transmission point cannot be determined according to the random access request sent by the terminal to the transmission point, all transmission points that have received the random access request are sent a random access response to the terminal.
The network side device according to claim 35, wherein the processor is further configured to:

If the corresponding transmission point is determined according to the random access request sent by the terminal to the transmission point, indicating that at least one transmission point in the transmission point group sends a random access response to the terminal;

If the corresponding transmission point cannot be determined according to the random access request sent by the terminal to the transmission point, all transmission points that have received the random access request are sent a random access response to the terminal.
A transmission point for performing random access, characterized in that the transmission point comprises:

A processor for reading a program in the memory, performing the following process:

Receiving, by the transceiver, a random access request from the terminal, where the random access request is sent by the terminal to the determined transmission point and/or the transmission point group; after receiving the indication of the network side device, Transceiver sends a random access response to the terminal;

A transceiver for receiving and transmitting data under the control of a processor.
The transmission point of claim 38, wherein the processor is further configured to:

If an uplink transmission of the random access response scheduling from the terminal is received, a contention resolution message is sent to the terminal.