WO2018028336A1

WO2018028336A1 - Random access method and device

Info

Publication number: WO2018028336A1
Application number: PCT/CN2017/091163
Authority: WO
Inventors: 张元�; 梁靖; 傅婧
Original assignee: 电信科学技术研究院
Priority date: 2016-08-12
Filing date: 2017-06-30
Publication date: 2018-02-15
Also published as: TWI643516B; TW201806429A; CN107734712A

Abstract

Disclosed in the present invention are a random access method and device, for solving the problem that the random access capacity of a whole system is limited as NB-loT supports multicarrier operations while a UE can only initiate random access on a primary carrier. The method comprises: a terminal receiving random access information of carriers capable of initiating random access, the carriers capable of initiating random access comprising a primary carrier and a secondary carrier; the terminal selecting a carrier from the carriers capable of initiating random access, according to the random access information, to initiate random access. The solutions using the embodiments of the present invention can not only initiate random access on the primary carrier, but can also initiate random access on the secondary carrier, thereby improving the random access capacity of the whole system, and providing better services to a large number of NB-IoT terminals.

Description

Random access method and device

The present application claims priority to Chinese Patent Application No. 201610664934.4, entitled "A Random Access Method and Apparatus", filed on August 12, 2016, the entire contents of in.

Technical field

The present invention relates to the field of communications technologies, and in particular, to a random access method and device.

Background technique

The Narrow Band Internet of Things (NB-IoT) Work Item (WI) is adopted and started in the 3GPP Release 13 (Release 13, Rel 13) phase. The goal of the narrowband Internet WI phase is to standardize the wireless access of the Cellular Internet of Things (CIoT) based on Long Term Evolution (LTE)/Long Term Evolution-Advanced (Long Term Evolution-Advanced, The LTE-A technology is extended. The main network features and objectives are: enhancing indoor coverage, supporting a large number of low-speed device access, low latency sensitivity, reducing device cost, reducing device power consumption, and optimizing network architecture. Among them, the characteristics that NB-IoT communication may have include:

NB-IoT terminal has low mobility;

The data transmission performed by the NB-IoT terminal and the network side does not require high real-time performance;

The NB-IoT terminal is energy limited and requires extremely low power consumption;

Only small amount of information is transmitted between the NB-IoT terminal and the network side;

NB-IoT terminals have low implementation complexity, and so on.

An NB-IoT terminal can have one or more of the above characteristics.

In order to reduce the cell load, NB-IoT supports multi-carrier operation. Under multi-carrier operation, the carrier is divided into a primary carrier (also referred to as an anchor carrier) and a secondary carrier (also referred to as a non-anchor carrier). The user equipment (User Equipment, referred to as UE; also referred to as the terminal) on the primary carrier can receive the Narrow Band Physical Broadcast Channel (NPBCH) and the Narrow Band Primary Synchronization Signal (NPSS). Narrow Band Secondary Synchronization Signal (NSSS) and System Information Block (SIB) transmission. The R13 UE on the secondary carrier currently only needs the Narrow Band-Physical Downlink Control Channel (Narrow Band-Physical Downlink Control Channel, The Narrow Band-Physical Downlink Shared Channel (NB-PDSCH) and/or the Narrow Band-Physical Uplink Shared Channel (NB-PUSCH). NB-IoT terminals cannot work on multiple carriers at the same time due to their limited capabilities. In R13, random access can only be initiated on the primary carrier. When the network side is configured with the connected state. When the UE works in the secondary carrier, the UE will continue to work on the secondary carrier until it enters the idle state, or needs to initiate random access in the connected state or be allocated to another carrier.

The NB-IoT supports multi-carrier operation, and the UE can only initiate random access on the primary carrier, which results in limited random access capacity of the system and cannot provide a better service for a large number of NB-IoT terminals.

Summary of the invention

The embodiment of the present invention provides a random access method and device, which is used to solve the problem that the NB-IoT supports multi-carrier operation, and the UE can only initiate random access on the primary carrier, which results in limited random access capacity of the system. The problem.

In a first aspect, a random access method is provided, the method comprising:

Receiving, by the terminal, random access information of a carrier that can initiate random access, where the carrier that can initiate random access includes a primary carrier and a secondary carrier;

According to the random access information, the terminal selects one carrier from the carrier that can initiate random access to initiate random access.

The random access information includes at least one of the following: attribute information of a carrier that can initiate random access, random access channel configuration information of a carrier that can initiate random access, and random access that can initiate random access. Physical random access channel configuration information of the carrier.

In a possible implementation manner, the random access information further includes:

Identification information for indicating a correspondence between random access channel configuration information and/or physical random access channel configuration information and a carrier that can initiate random access.

a bitmap identifier indicating whether the random access channel configuration information of the secondary carrier that can initiate the random access is the same as the random access channel configuration information of the primary carrier, and/or the secondary carrier used to indicate the secondary carrier that can initiate the random access Whether the physical random access channel configuration information and the physical random access channel configuration information of the primary carrier are the same bitmap identifier;

or

A bitmap identifier indicating whether the random access channel configuration information and the physical random access channel configuration information of the secondary carrier that can initiate random access are the same as the random access channel configuration information and the physical random access channel configuration information of the primary carrier .

In a possible implementation manner, attribute information of a carrier that can initiate random access includes at least one of the following information:

The downlink working frequency and/or the uplink working frequency of the carrier that can initiate the random access, the index of the carrier that can initiate the random access, and the bitmap configuration information of the downlink available subframe of the carrier that can initiate the random access, can be initiated. The downlink interval configuration of the randomly accessed carrier and the in-band carrier information of the carrier that can initiate random access.

In a possible implementation manner, the random access channel configuration information of the carrier that can initiate random access includes the following At least one of the information:

The maximum number of transmissions of the random access sequence, the power increment parameter, the random access channel list, and the additional offset of cell selection or reselection when the radio resource control RRC connection setup fails.

In a possible implementation manner, the physical random access channel configuration information of the carrier that can initiate random access includes at least one of the following information:

a cyclic prefix length of a physical random access channel, a list of information of a reference signal reception level threshold, and a parameter list of a physical random access channel;

The parameter list includes a period of a physical random access channel, an initial time of a physical random access channel, a subcarrier offset of a physical random access channel, and at least a number of subcarriers of a physical random access channel. One parameter.

According to any of the foregoing embodiments, in a possible implementation manner, if the terminal is in an RRC idle state, the terminal needs to establish an RRC connection, or the terminal resumes an RRC connection; the terminal is configured according to the random access information. From the carrier that can initiate random access, select one carrier to initiate random access, including:

The terminal determines a carrier that receives the paging;

Determining, by the terminal, the random access information of the carrier that receives the paging from the random access information, and according to the random access information of the carrier that receives the paging, on the carrier that receives the paging , initiate random access.

In a possible implementation manner, the terminal, according to the random access information, selects one carrier to initiate random access from the carrier that can initiate random access, and includes:

The terminal receives indication signaling for instructing the terminal to initiate random access on the physical downlink control channel PDCCH on any carrier that can initiate random access;

Determining, by the terminal from the random access information, random access information of any carrier that can initiate random access, and according to any random access information of the carrier that can initiate random access, Random access is initiated on any of the carriers that can initiate random access.

In a possible implementation manner, if the terminal is in an RRC connected state, or the terminal has uplink data, a random access needs to be initiated; and the terminal may initiate a random access carrier according to the random access information. Select one carrier to initiate random access, including:

Determining, by the terminal, the random access information of the secondary carrier configured by the network side for the terminal from the random access information, and configuring the secondary carrier configured for the terminal on the network side according to the determined random access information. On, initiate random access.

In a possible implementation manner, the terminal, according to the random access information, before selecting a carrier to initiate random access from a carrier that can initiate random access, further includes: switching, by the terminal, according to the network side a command to determine a target cell and a target carrier configured on the network side;

The terminal, according to the random access information, selects a carrier to initiate random access from the carrier that can initiate the random access, and includes: the terminal according to the random access information of the target carrier, in the target carrier On, initiated in Random access of the target cell.

In this manner, the terminal receives random access information of a carrier that can initiate random access, including:

Receiving, by the handover command, the random access information of the target carrier by using the handover command; or

The terminal receives random access information of a carrier that can initiate random access in the target cell, and determines random access information of the target carrier from the random access information.

In a possible implementation, if the terminal is in an RRC connected state and moves to an edge of a current cell, or the terminal is in an RRC connection reestablishment state;

The terminal, according to the random access information, before selecting a carrier to initiate random access from the carrier that can initiate random access, further includes: determining, by the terminal, the target cell;

Receiving the random access information of the carrier that can initiate the random access, the terminal includes: receiving, by the terminal, random access information of a carrier that can initiate random access in the target cell;

The terminal selects one carrier to initiate random access from the carrier that can initiate random access according to the random access information, and includes:

Determining, by the terminal, a carrier that receives a paging in the target cell, and determining, in the random access information, random access information of a carrier that receives a paging in the target cell, according to the determined random access information. Initiating random access on a carrier that receives paging in the target cell; or

The terminal randomly selects a carrier that can be initiated by the terminal and the network side to initiate random access, and determines random access information of the selected carrier from the random access information, and according to the determined random access. Information, initiating random access on the selected carrier.

In a second aspect, a random access method is provided, the method comprising:

The network side sends the random access information of the carrier that can initiate the random access to the terminal, where the carrier that can initiate the random access includes the primary carrier and the secondary carrier;

The network side receives random access of the terminal on any carrier that can initiate random access.

For the random access information of the carrier that can initiate the random access, refer to the related description in the first aspect, and details are not described herein again.

In a possible implementation, the network side sends the random access information of the carrier that can initiate the random access to the terminal, including:

The network side sends the random access information of the carrier that can initiate the random access to the terminal by using the system information of the primary carrier in the cell; or

The network side sends the random access information of the target carrier configured by the network side to the terminal to the terminal by using a handover command.

In a third aspect, a terminal is provided, where the terminal includes:

a receiving module, configured to receive random access information of a carrier that can initiate random access, where the random access can be initiated The carrier includes a primary carrier and a secondary carrier;

And an access module, configured to select, according to the random access information, a carrier to initiate random access from a carrier that can initiate random access.

In a possible implementation manner, the access module is specifically configured to:

Receiving indication signaling for instructing the terminal to initiate random access on the physical downlink control channel PDCCH on any carrier that can initiate random access;

Determining, from the random access information, random access information of any carrier that can initiate random access, and according to any random access information of the carrier that can initiate random access, A random access can be initiated on a carrier that can initiate random access.

In a possible implementation manner, if the terminal is in an RRC connected state, or the terminal has uplink data, a random access needs to be initiated; the access module is specifically configured to:

Determining random access information of the secondary carrier configured by the network side for the terminal from the random access information, and initiating, on the network side, the secondary carrier configured for the terminal, according to the determined random access information, Random access.

Determining a target cell and a target carrier configured by the network side according to the handover command sent by the network side; and performing random access on the target cell on the target carrier according to the random access information of the target carrier.

In this manner, the receiving module is specifically configured to:

Receiving random access information of the target carrier by using the handover command; or

And receiving random access information of a carrier that can initiate random access in the target cell, and determining random access information of the target carrier from the random access information.

In a possible implementation, if the terminal is in an RRC connected state and moves to an edge of a current cell, or the terminal is in an RRC connection reestablishment state; the access module is specifically configured to: determine a target cell;

Determining a carrier that receives a paging in the target cell, and determining, in the random access information, random access information of a carrier that receives a paging in the target cell, according to the determined random access information, Determining random access on the carrier that receives the paging in the target cell; or randomly selecting the carrier that can be initiated by the terminal and the network side to initiate random access, and determining the selected carrier from the random access information Random access information, and according to the determined random access information, initiate random access on the selected carrier;

The receiving module is specifically configured to: receive random access information of a carrier that can initiate random access in the target cell.

In a fourth aspect, a terminal is provided, the terminal comprising a transceiver, and at least one processor coupled to the transceiver, wherein:

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

Receiving, by the transceiver, random access information of a carrier that can initiate random access, where the carrier that can initiate random access includes a primary carrier and a secondary carrier; and according to the random access information, a random access may be initiated In the carrier, one carrier is selected to initiate random access;

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

In a possible implementation manner, if the terminal is in an RRC idle state, the terminal needs to establish an RRC connection, or the terminal resumes an RRC connection; the processor reads a program in the memory, and specifically performs the following process. :

Determining a carrier that receives the paging; determining, from the random access information, random access information of the carrier that receives the paging, and according to the random access information of the carrier that receives the paging, in the receiving Random access is initiated on the carrier of the call.

In a possible implementation manner, the processor reads a program in the memory, and specifically performs the following process:

Receiving, by the transceiver, indication signaling for instructing the terminal to initiate random access on a physical downlink control channel PDCCH on any carrier that can initiate random access;

In a possible implementation manner, if the terminal is in an RRC connected state, or the terminal has uplink data arriving, a random access needs to be initiated; the processor reads the program in the memory, and specifically performs the following process:

In this manner, the processor reads the program in the memory, and specifically performs the following process:

Controlling, by the transceiver, the random access information of the target carrier by using the handover command;

or

And receiving, by the transceiver, random access information of a carrier that can initiate random access in the target cell, and determining random access information of the target carrier from the random access information.

In a possible implementation, if the terminal is in an RRC connected state and moves to an edge of a current cell; or the terminal is in an RRC connection reestablishment state; the processor reads a program in the memory, specifically executing the following Process:

Determining the target cell;

Receiving, by the transceiver, random access information of a carrier that can initiate random access in the target cell;

Determining a carrier that receives a paging in the target cell, and determining, in the random access information, random access information of a carrier that receives a paging in the target cell, according to the determined random access information, Determining random access on the carrier that receives the paging in the target cell; or randomly selecting the carrier that can be initiated by the terminal and the network side to initiate random access, and determining the selected carrier from the random access information Random access information, and initiate random access on the selected carrier according to the determined random access information.

In a fifth aspect, a network side device is provided, where the network side device includes:

a sending module, configured to send random access information of a carrier that can initiate random access to a terminal, where the carrier that can initiate random access includes a primary carrier and a secondary carrier;

The receiving module is configured to receive random access of the terminal on any carrier that can initiate random access.

In a possible implementation manner, the sending module is specifically configured to:

Sending random access information of a carrier that can initiate random access to the terminal by using system information of the primary carrier in the cell; or

The random access information of the target carrier configured by the network side device for the terminal is sent to the terminal by using a handover command.

In a sixth aspect, a network side device is provided, the network side device comprising: a transceiver, and at least one processor connected to the transceiver, wherein:

Controlling, by the transceiver, random access information of a carrier that can initiate random access, to the terminal, where the carrier that can initiate random access includes a primary carrier and a secondary carrier;

Receiving, by the transceiver, random access of the terminal on any carrier that can initiate random access;

Controlling, by the transceiver, the random access information of the carrier that can initiate random access by using system information of the primary carrier in the cell; or

And controlling the transceiver to send the random access information of the target carrier configured by the network side device to the terminal to the terminal by using a handover command.

According to a seventh aspect, a computer readable storage medium storing executable program code, the program The code is used to implement the method described in the first aspect.

In an eighth aspect, a computer readable storage medium is provided, wherein executable program code is stored, the program code for implementing the method of the second aspect.

In the method and device provided by the embodiment of the present invention, the terminal first receives random access information of a carrier that can initiate random access, and then selects one carrier from carriers that can initiate random access according to the received random access information. Initiating a random access, the scheme of the embodiment of the present invention can not only initiate random access on the primary carrier, but also random access initiated on the secondary carrier, thereby improving the overall random access capacity of the system, which can be massive. The NB-IoT terminal provides better service.

DRAWINGS

FIG. 1 is a schematic flowchart of a method for random access on a terminal side according to an embodiment of the present disclosure;

FIG. 2 is a schematic flowchart diagram of a random access method on a network side according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a terminal according to an embodiment of the present disclosure;

4 is a schematic diagram of another terminal according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a network side device according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of another network side device according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The "multiple" and "multiple sets" referred to in the embodiments of the present invention mean two or more.

The embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It is to be understood that the embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the embodiment shown in FIG. 1, a random access method on the terminal side is provided, including:

S11. The terminal receives random access information of a carrier that can initiate random access, where the carrier that can initiate random access includes a primary carrier and a secondary carrier.

The number of secondary carriers that can initiate random access is one or more.

Optionally, the random access information of the primary carrier and the random access information of the secondary carrier that can initiate random access may be sent simultaneously through one system information, or may be separately sent through multiple system information.

S12. The terminal selects one carrier from the carrier that can initiate random access according to the random access information to initiate random access.

In the embodiment of the present invention, the terminal first receives the random access information of the carrier that can initiate the random access, and then selects one carrier to initiate the random access from the carrier that can initiate the random access according to the received random access information. The solution of the embodiment of the present invention can not only initiate random access on the primary carrier, but also random access initiated on the secondary carrier, thereby improving the overall random access capacity of the system, and can be used for a large number of NB-IoT terminals. Good service.

In the embodiment of the present invention, the random access information includes at least one of the following information:

The attribute information of the carrier that can initiate the random access, the random access channel configuration information of the carrier that can initiate the random access, and the physical random access channel configuration information of the carrier that can initiate the random access.

In this embodiment of the present invention, the attribute information of each carrier that can initiate random access includes at least one of the following information:

The downlink working frequency and/or the uplink working frequency of the carrier that can initiate the random access, the index of the carrier that can initiate the random access, and the bitmap of the downlink available subframe of the carrier that can initiate the random access (bitmap) The configuration information, the downlink configuration of the carrier that can initiate the random access, and the inband carrier information of the carrier that can initiate the random access.

The index of the secondary carrier that can initiate the random access can also be notified to the terminal in an implicit manner. For example, the index of the secondary carrier is implicitly notified by the secondary carrier configuration list, that is, the index of the secondary carrier is in the secondary carrier according to the secondary carrier. Configure the sort order in the list order as an index.

In this embodiment of the present invention, the random access channel configuration information of each carrier that can initiate random access is one or more sets, and each set of random access channel configuration information includes at least one of the following information:

The maximum number of transmissions of the random access sequence, the power increment parameter, the random access channel list, and the additional offset of cell selection or reselection when the Radio Resource Control (RRC) connection establishment fails.

In the embodiment of the present invention, the physical random access channel configuration information of each carrier that can initiate random access is one or more sets, and each set of physical random access channel configuration information includes at least one of the following information:

A cyclic prefix (CP) length of a physical random access channel, a list of information of a reference signal reception level threshold, and a parameter list of a physical random access channel.

The parameter list of the physical random access channel corresponds to one or more parameters of the physical random access channel, and the parameter list includes but is not limited to at least one of the following parameters: a period of the physical random access channel, an initial time, and a subcarrier. Offset, number of subcarriers, etc.

a bitmap identifier indicating whether the random access channel configuration information of the secondary carrier that can initiate random access is the same as the random access channel configuration information of the primary carrier, and/or is used to indicate that random access can be initiated. Subcarrier carrier a bitmap identifier of whether the random access channel configuration information is the same as the physical random access channel configuration information of the primary carrier;

or

a bitmap for indicating whether the random access channel configuration information of the secondary carrier that can initiate random access and the physical random access channel configuration information are the same as the random access channel configuration information of the primary carrier and the physical random access channel configuration information ( Bitmap) identifier.

For example, a bitmap identifier indicating that the random access channel configuration information of the secondary carrier that can initiate random access is the same as the random access channel configuration information of the primary carrier is used as an example, and each of the bitmap identifiers is used. The bit corresponds to a secondary carrier, and the bit value is “0”, indicating that the random access channel configuration information of the secondary carrier corresponding to the bit is different from the random access channel configuration information of the primary carrier, and the bit value is “1” The random access channel configuration information of the secondary carrier corresponding to the bit is the same as the random access channel configuration information of the primary carrier.

According to any of the foregoing embodiments, the terminal in S12 selects one carrier to initiate random access from the carrier that can initiate random access according to the random access information, and the specific implementation manner is different in different scenarios. There are several possible implementations:

Mode 1, the scenario applied by the mode is that the terminal is in an RRC idle state, the terminal needs to establish an RRC connection, or the terminal resumes an RRC connection.

In this manner, S11 specifically includes:

The terminal receives the random access information of the carrier that can initiate the random access sent by the network side by using the system broadcast, for example, the system information of the primary carrier in the cell where the terminal is currently located.

In the embodiment of the present invention, the system information includes a Master Information Block (MIB) and/or a System Information Block (SIB).

In this manner, S12 specifically includes:

The terminal determines a carrier that receives the paging;

Specifically, the terminal may determine, according to system information of a primary carrier in a cell where the terminal is currently located, a carrier that receives a paging.

The mode 2 is applied to the scenario where the network side has configured the secondary carrier as the working carrier of the terminal, and the physical downlink control channel (Physical Downlink Control Channel, PDCCH for short) on the configured secondary carrier. The terminal is instructed to initiate random access.

In this manner, S11 specifically includes:

In this manner, S12 specifically includes:

The terminal receives indication signaling for instructing the terminal to initiate random access on the PDCCH on any secondary carrier;

Determining random access information of any of the secondary carriers from the random access information, and starting random on the any secondary carrier according to the random access information of any of the secondary carriers Access.

Mode 3: The scenario applied by the mode is that the secondary carrier is configured as the working carrier of the terminal for the terminal, and the terminal needs to initiate random access if the terminal is in the RRC connected state or the terminal has uplink data arrives. .

In this manner, S11 specifically includes:

In this manner, S12 specifically includes:

Mode 4: The scenario applied by the mode is that the handover of the terminal is configured on the network side.

In this way, before S12, it also includes:

The terminal determines the target cell and the target carrier configured by the network side according to the handover command sent by the network side.

The handover command indicates a target cell configured by the network side for the terminal and a target carrier on the target cell.

In this manner, the S12 specifically includes: the terminal initiating random access in the target cell on the target carrier according to random access information of the target carrier.

In this manner, the terminal acquires random access information of the target carrier, and includes the following two possible implementation manners:

Manner 41: The handover command carries random access information of the target carrier.

In this manner, S11 specifically includes:

The terminal receives random access information of the target carrier by using the handover command.

Manner 42: The random access information of the target carrier is not carried in the handover command.

In this manner, S11 specifically includes:

The terminal receives random access information of a carrier that can initiate random access in the target cell.

Further, the terminal determines random access information of the target carrier from the received random access information.

Specifically, the terminal receives, by using a system broadcast, for example, system information of a primary carrier in the target cell, and receiving random access information of a carrier that can initiate random access in the target cell that is sent by the network.

Mode 5: The scenario applied by the mode is that the terminal is in an RRC connected state and moves to an edge of a current cell; or the terminal is in an RRC connection reestablishment state.

In this manner, before S12, the method further includes: the terminal determining the target cell.

Specifically, if the terminal is in an RRC connected state and moves to an edge of a current cell, the terminal determines the target cell by using a cell reselection process; if the terminal is in an RRC connection reestablishment state, the terminal passes the The cell selection process determines the target cell.

In this manner, S11 specifically includes: the terminal receiving random access information of a carrier that can initiate random access in the target cell.

Specifically, the terminal broadcasts the random access information of the carrier that can initiate the random access in the target cell that is sent by the network side by using the system broadcast, such as the system information of the primary carrier in the target cell.

In this manner, S12 specifically includes the following two possible implementation manners:

In a mode, the terminal determines a carrier that receives a paging in the target cell, and determines, in the random access information, random access information of a carrier that receives a paging in the target cell, according to the determined random The access information is initiated on the carrier that receives the paging in the target cell, and initiates random access.

The mode 52, the terminal randomly selects a carrier that can be initiated by the terminal and the network side to initiate random access, and determines random access information of the selected carrier from the random access information, and according to the determined Random access information, initiate random access on the selected carrier.

In this manner, if the number of carriers that can initiate random access supported by the terminal and the network side is at least two, the terminal randomly selects one of the at least two carriers that can initiate random access. The carrier initiates random access. Certainly, the carrier that initiates random access may also be selected in other manners. For example, the terminal may select a carrier with the best signal strength to initiate random access; and the like. The specific selection manner is not limited in the embodiment of the present invention.

In the embodiment shown in FIG. 2, a random access method on the network side is provided, including:

S21: The network side sends the random access information of the carrier that can initiate the random access to the terminal, where the carrier that can initiate the random access includes the primary carrier and the secondary carrier.

S22. The network side receives random access of the terminal on any carrier that can initiate random access.

For the random access information of the carrier that can initiate random access, refer to the related description in the embodiment shown in FIG. 1 , and details are not described herein again.

In the embodiment of the present invention, if the network side configures the terminal to perform cell handover, S22 specifically includes the following possible implementation manners:

The network side sends the random access information of the carrier that can initiate the random access to the terminal through the system broadcast. For example, the network side sends the random carrier that can initiate the random access by using the system information on the primary carrier in the cell. Access information; or

The random access method provided by the embodiment of the present invention is described in detail below through several specific embodiments.

Embodiment 1 This embodiment describes a random access procedure when a terminal is in an RRC idle state and establishes or restores an RRC connection, and specifically includes:

1) The terminal receives random access information of a carrier that can initiate random access, which is sent by the network side in the system broadcast, and stores the information;

2) When the terminal needs to initiate initial access, for example, when receiving a paging or need to send data or signaling, if the terminal is allowed to access the network, the terminal initiates a random access procedure on the carrier receiving the paging, otherwise it does not initiate Random access process.

Embodiment 2 This embodiment describes a random access procedure of a terminal when a network side instructs a terminal to initiate a random access procedure by using a PDCCH order. Specifically include:

2) The secondary side is configured on the network side to the terminal, and the configuration is successful;

3) When the terminal does not need to update the system message, the network side instructs the terminal to initiate a random access procedure on the PDCCH on the configured secondary carrier;

4) The terminal initiates a random access procedure on the secondary carrier that receives the PDCCH.

Embodiment 3: This embodiment describes a random access procedure of a terminal when the terminal is in an RRC connected state and uplink data arrives to initiate a random access procedure. Specifically include:

3) When the terminal does not need to update the system message, the terminal initiates a random access procedure on the secondary carrier configured on the network side.

Embodiment 4: This embodiment describes a random access procedure of a terminal under handover of a network side configuration. Specifically include:

1) The network side configuration terminal switches to the target cell;

Specifically, the network side sends a handover command to indicate related information of the target cell, and the related information of the target cell includes, but is not limited to, at least one of the following information:

The identifier of the target cell, the identifier of the target carrier (such as the frequency of the target carrier), and the random access information of the target carrier. The target carrier may be a primary carrier or a secondary carrier of the target cell.

2) If the target carrier configured on the network side is the primary carrier of the target cell, the terminal reads the system information on the primary carrier of the target cell and stores it, and initiates a random access procedure on the primary carrier;

If the target carrier configured on the network side is the secondary carrier of the target cell, further:

If the related information of the target cell includes random access information of the target carrier, the terminal initiates a random access procedure on the target carrier according to the random access information;

If the related information of the target cell does not include random access information of the target carrier, the terminal receives the network side Reading, by the primary carrier in the target cell, random access information of one or more secondary carriers that can initiate random access in the target cell, and storing the random access information of the target carrier, and acquiring the random access information of the target carrier according to the target carrier Incoming information, initiating a random access procedure on the target carrier.

Embodiment 5: This embodiment describes a process of random access of a terminal when the terminal is in an RRC connected state and moves to a cell edge. Specifically include:

1) The terminal is in an RRC connected state, and the target cell is selected by cell reselection;

2) The terminal reads system information in the primary carrier of the target cell and stores it;

3) The terminal initiates a random access procedure on the primary carrier of the target cell.

Embodiment 6: This embodiment describes a process of random access of a terminal when the terminal is in an RRC connected state and moves to a cell edge. Specifically include:

3) The terminal receives the random access information of the carrier that can initiate the random access sent by the network side in the system broadcast of the target cell, and stores, according to the system information of the target cell, determines the carrier that the terminal receives the paging, on the carrier. Initiate a random access process.

Embodiment 7: This embodiment describes a process of random access of a terminal when the terminal is in an RRC connected state and moves to a cell edge. Specifically include:

3) The terminal receives the random access information of the carrier that can initiate the random access, which is sent by the network side in the system broadcast of the target cell, and stores the terminal. The terminal randomly selects one terminal and the carrier supported by the network side to initiate a random access procedure.

Embodiment 8: This embodiment describes a process of random access of a terminal when a terminal RRC connection is reestablished. Specifically include:

1) The terminal performs cell selection and selects a target cell;

2) The terminal reads system information in the primary carrier of the target cell and stores it, and determines whether to access the cell according to the access control information broadcasted on the primary carrier. When the terminal can access, perform the following 3), otherwise return to execute. Cell selection, select other cells;

3) The terminal reads the random access information of the carrier that can initiate the random access sent by the network side in the broadcast of the target cell, and stores, and determines, according to the system information of the target cell, the carrier that the terminal receives the paging, on the carrier. Initiate a random access process.

The above method processing flow can be implemented by a software program, which can be stored in a storage medium, and when the stored software program is called, the above method steps are performed.

Based on the same inventive concept, a terminal is provided in the embodiment of the present invention. The principle of solving the problem is similar to the method embodiment shown in FIG. 1 . Therefore, the implementation of the terminal can refer to the implementation of the method. Do not Let me repeat.

In the embodiment shown in FIG. 3, a terminal is provided, and the terminal includes:

The receiving module 31 is configured to receive random access information of a carrier that can initiate random access, where the carrier that can initiate random access includes a primary carrier and a secondary carrier;

The access module 32 is configured to select one carrier to initiate random access from the carriers that can initiate random access according to the random access information.

For the random access information of the carrier that can initiate the random access, refer to the related description in the embodiment shown in FIG. 1 , and details are not described herein again.

In a possible implementation, if the terminal is in an RRC idle state, the terminal needs to establish an RRC connection, or the terminal resumes an RRC connection; the access module 32 is specifically configured to:

In a possible implementation manner, the access module 32 is specifically configured to:

In a possible implementation manner, if the terminal is in an RRC connected state, or the terminal has uplink data, a random access needs to be initiated; the access module 32 is specifically configured to:

In this manner, the receiving module 31 is specifically configured to:

In a possible implementation, if the terminal is in an RRC connected state and moves to an edge of a current cell, or the terminal is in an RRC connection reestablishment state, the access module 32 is specifically configured to: determine a target cell;

Determining a carrier that receives a paging in the target cell, and determining, in the random access information, the target cell The random access information of the carrier that receives the paging, according to the determined random access information, initiates random access on the carrier that receives the paging in the target cell; or randomly selects both the terminal and the network side to support a carrier that can initiate random access, determining random access information of the selected carrier from the random access information, and initiating random access on the selected carrier according to the determined random access information;

The receiving module 31 is specifically configured to: receive random access information of a carrier that can initiate random access in the target cell.

In the embodiment shown in Figure 4, another terminal is provided, the terminal comprising a transceiver 41, and at least one processor 42 coupled to the transceiver 41, wherein:

The processor 42 is configured to read the program in the memory 43 and perform the following process:

Receiving, by the transceiver 41, random access information of a carrier that can initiate random access, where the carrier that can initiate random access includes a primary carrier and a secondary carrier; and according to the random access information, a carrier that can initiate random access Selecting a carrier to initiate random access;

The transceiver 41 is configured to receive and transmit data under the control of the processor 42.

In FIG. 4, the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 42 and various circuits of memory represented by memory 43. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. The transceiver 41 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. For different user equipments, the user interface 44 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like. The processor 42 is responsible for managing the bus architecture and general processing, as well as providing various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. The memory 43 can store data used by the processor 42 when performing operations.

Optionally, the processor 42 can be a central buried device (CPU), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a CPLD complex programmable. Complex Programmable Logic Device (CPLD).

In a possible implementation manner, if the terminal is in an RRC idle state, the terminal needs to establish an RRC connection, or the terminal resumes an RRC connection; the processor 42 reads the program in the memory 43 to perform the following process:

Determining a carrier that receives the paging; determining, from the random access information, random access information of the carrier that receives the paging, and according to the random access information of the carrier that receives the paging, in the receiving On the carrier of the call, initiate random Access.

In a possible implementation, the processor 42 reads the program in the memory 43 and performs the following processes:

Receiving, by the transceiver 41, the indication signaling for instructing the terminal to initiate random access on the physical downlink control channel PDCCH on any carrier that can initiate random access;

In a possible implementation manner, if the terminal is in an RRC connected state, or the terminal has uplink data arriving, it is required to initiate random access; the processor 42 reads the program in the memory 43 to perform the following process:

In this manner, the processor 42 reads the program in the memory 43 and specifically performs the following process:

The control transceiver 41 receives the random access information of the target carrier by using the handover command;

or

Receiving, by the transceiver 41, random access information of a carrier that can initiate random access in the target cell, and determining random access information of the target carrier from the random access information.

In a possible implementation manner, if the terminal is in an RRC connected state and moves to an edge of a current cell; or the terminal is in an RRC connection reestablishment state; the processor 42 reads a program in the memory 43 to perform the following process:

Determining the target cell;

Receiving, by the transceiver 41, random access information of a carrier that can initiate random access in the target cell;

Based on the same inventive concept, the network side device is further provided in the embodiment of the present invention. The principle of the device is similar to the method embodiment shown in FIG. 2, and the implementation of the device can be implemented by referring to the method. It will not be repeated here.

In the embodiment shown in FIG. 5, a network side device is provided, where the network side device includes:

The sending module 51 is configured to send random access information of a carrier that can initiate random access to the terminal, where the carrier that can initiate random access includes a primary carrier and a secondary carrier;

The receiving module 52 is configured to receive random access of the terminal on any carrier that can initiate random access.

In a possible implementation manner, the sending module 51 is specifically configured to:

In the embodiment shown in FIG. 6, another network side device is provided, the network side device comprising: a transceiver 61, and at least one processor 62 connected to the transceiver 61, wherein:

The processor 62 is configured to read the program in the memory 63 and perform the following process:

The control transceiver 61 sends the random access information of the carrier that can initiate the random access to the terminal, where the carrier that can initiate the random access includes the primary carrier and the secondary carrier;

Receiving random access of the terminal through the transceiver 61 on any carrier that can initiate random access;

The transceiver 61 is configured to receive and transmit data under the control of the processor 62.

Here, in FIG. 6, the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 62 and various circuits of memory represented by memory 63. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. Transceiver 61 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium. The processor 62 is responsible for managing the bus architecture and general processing, as well as providing various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. The memory 63 can store data used by the processor 62 when performing operations.

Alternatively, the processor 62 can be a CPU, an ASIC, an FPGA, or a CPLD.

In a possible implementation, the processor 62 reads the program in the memory 63, and specifically performs the following process:

The control transceiver 61 sends the random access information of the carrier that can initiate the random access to the terminal by using the system information of the primary carrier in the cell; or

The control transceiver 61 transmits the random access information of the target carrier configured by the network side device to the terminal to the terminal by using a handover command.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

While the preferred embodiment of the invention has been described, it will be understood that Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

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

Claims

A random access method, the method comprising:

Receiving, by the terminal, random access information of a carrier that can initiate random access, where the carrier that can initiate random access includes a primary carrier and a secondary carrier;

According to the random access information, the terminal selects one carrier from the carrier that can initiate random access to initiate random access.
The method according to claim 1, wherein the random access information comprises at least one of the following: attribute information of a carrier that can initiate random access, and random access of a carrier that can initiate random access. Channel configuration information, and physical random access channel configuration information of a carrier that can initiate random access.
The method according to claim 2, wherein the random access information further comprises:

Identification information for indicating a correspondence between random access channel configuration information and/or physical random access channel configuration information and a carrier that can initiate random access.
The method according to claim 2, wherein the random access information further comprises:

a bitmap identifier indicating whether the random access channel configuration information of the secondary carrier that can initiate the random access is the same as the random access channel configuration information of the primary carrier, and/or the secondary carrier used to indicate the secondary carrier that can initiate the random access Whether the physical random access channel configuration information and the physical random access channel configuration information of the primary carrier are the same bitmap identifier;

or

A bitmap identifier indicating whether the random access channel configuration information and the physical random access channel configuration information of the secondary carrier that can initiate random access are the same as the random access channel configuration information and the physical random access channel configuration information of the primary carrier .
The method according to claim 2, wherein the attribute information of the carrier that can initiate random access comprises at least one of the following information:

The downlink working frequency and/or the uplink working frequency of the carrier that can initiate the random access, the index of the carrier that can initiate the random access, and the bitmap configuration information of the downlink available subframe of the carrier that can initiate the random access, can be initiated. The downlink interval configuration of the randomly accessed carrier and the in-band carrier information of the carrier that can initiate random access.
The method according to claim 2, wherein the random access channel configuration information of the carrier that can initiate the random access comprises at least one of the following information:

The maximum number of transmissions of the random access sequence, the power increment parameter, the random access channel list, and the additional offset of cell selection or reselection when the radio resource control RRC connection setup fails.
The method according to claim 2, wherein the physical random access channel configuration information of the carrier that can initiate random access comprises at least one of the following information:

a cyclic prefix length of a physical random access channel, a list of information of a reference signal reception level threshold, and a physical a list of parameters of the machine access channel;

The parameter list includes a period of a physical random access channel, an initial time of a physical random access channel, a subcarrier offset of a physical random access channel, and at least a number of subcarriers of a physical random access channel. One parameter.
The method according to any one of claims 1 to 7, wherein if the terminal is in an RRC idle state, the terminal needs to establish an RRC connection, or the terminal resumes an RRC connection; the terminal is according to the random Access information, from a carrier that can initiate random access, select one carrier to initiate random access, including:

The terminal determines a carrier that receives the paging;

Determining, by the terminal, the random access information of the carrier that receives the paging from the random access information, and according to the random access information of the carrier that receives the paging, on the carrier that receives the paging , initiate random access.
The method according to any one of claims 1 to 7, wherein the terminal selects one carrier to initiate random access from the carrier that can initiate random access according to the random access information, and includes:

The terminal receives indication signaling for instructing the terminal to initiate random access on the physical downlink control channel PDCCH on any carrier that can initiate random access;

Determining, by the terminal from the random access information, random access information of any carrier that can initiate random access, and according to any random access information of the carrier that can initiate random access, Random access is initiated on any of the carriers that can initiate random access.
The method according to any one of claims 1 to 7, wherein if the terminal is in an RRC connected state, or the terminal has uplink data arriving, it is required to initiate random access; the terminal according to the random access Information, from a carrier that can initiate random access, select one carrier to initiate random access, including:

Determining, by the terminal, the random access information of the secondary carrier configured by the network side for the terminal from the random access information, and configuring the secondary carrier configured for the terminal on the network side according to the determined random access information. On, initiate random access.
The method according to any one of claims 1 to 7, wherein the terminal includes, according to the random access information, a carrier that can initiate random access, before selecting a carrier to initiate random access, and further comprising: The determining, by the terminal, the target cell and the target carrier configured by the network side according to the handover command sent by the network side;

The terminal, according to the random access information, selects a carrier to initiate random access from the carrier that can initiate the random access, and includes: the terminal according to the random access information of the target carrier, in the target carrier Initiating random access at the target cell.
The method according to claim 11, wherein the terminal receives random access information of a carrier that can initiate random access, including:

Receiving, by the handover command, the random access information of the target carrier by using the handover command; or

The terminal receives random access information of a carrier that can initiate random access in the target cell, and determines random access information of the target carrier from the random access information.
The method according to any one of claims 1 to 7, wherein the terminal is in an RRC connected state and moves to an edge of a current cell; or the terminal is in an RRC connection reestablished state;

The terminal, according to the random access information, before selecting a carrier to initiate random access from the carrier that can initiate random access, further includes: determining, by the terminal, the target cell;

Receiving the random access information of the carrier that can initiate the random access, the terminal includes: receiving, by the terminal, random access information of a carrier that can initiate random access in the target cell;

The terminal selects one carrier to initiate random access from the carrier that can initiate random access according to the random access information, and includes:

Determining, by the terminal, a carrier that receives a paging in the target cell, and determining, in the random access information, random access information of a carrier that receives a paging in the target cell, according to the determined random access information. Initiating random access on a carrier that receives paging in the target cell; or

The terminal randomly selects a carrier that can be initiated by the terminal and the network side to initiate random access, and determines random access information of the selected carrier from the random access information, and according to the determined random access. Information, initiating random access on the selected carrier.
A random access method, the method comprising:

The network side sends the random access information of the carrier that can initiate the random access to the terminal, where the carrier that can initiate the random access includes the primary carrier and the secondary carrier;

The network side receives random access of the terminal on any carrier that can initiate random access.
The method according to claim 14, wherein the random access information comprises at least one of the following: attribute information of a carrier that can initiate random access, and random access of a carrier that can initiate random access. Channel configuration information, and physical random access channel configuration information of a carrier that can initiate random access.
The method according to claim 15, wherein the random access information further comprises:

Identification information for indicating a correspondence between random access channel configuration information and/or physical random access channel configuration information and a carrier that can initiate random access.
The method according to claim 15, wherein the random access information further comprises:

a bitmap identifier indicating whether the random access channel configuration information of the secondary carrier that can initiate the random access is the same as the random access channel configuration information of the primary carrier, and/or the secondary carrier used to indicate the secondary carrier that can initiate the random access Whether the physical random access channel configuration information and the physical random access channel configuration information of the primary carrier are the same bitmap identifier;

or

A bitmap identifier indicating whether the random access channel configuration information and the physical random access channel configuration information of the secondary carrier that can initiate random access are the same as the random access channel configuration information and the physical random access channel configuration information of the primary carrier .
The method according to claim 15, wherein attribute information of a carrier capable of randomly accessing is initiated Includes at least one of the following information:

The downlink working frequency and/or the uplink working frequency of the carrier that can initiate the random access, the index of the carrier that can initiate the random access, and the bitmap configuration information of the downlink available subframe of the carrier that can initiate the random access, can be initiated. The downlink interval configuration of the randomly accessed carrier and the in-band carrier information of the carrier that can initiate random access.
The method according to claim 15, wherein the random access channel configuration information of the carrier that can initiate random access comprises at least one of the following information:

The maximum number of transmissions of the random access sequence, the power increment parameter, the random access channel list, and the additional offset of cell selection or reselection when the radio resource control RRC connection setup fails.
The method according to claim 15, wherein the physical random access channel configuration information of the carrier that can initiate random access includes at least one of the following information:

a cyclic prefix length of a physical random access channel, a list of information of a reference signal reception level threshold, and a parameter list of a physical random access channel;

The parameter list includes a period of a physical random access channel, an initial time of a physical random access channel, a subcarrier offset of a physical random access channel, and at least a number of subcarriers of a physical random access channel. One parameter.
The method according to any one of claims 14 to 20, wherein the network side sends the random access information of the carrier that can initiate the random access to the terminal, including:

The network side sends the random access information of the carrier that can initiate the random access to the terminal by using the system information of the primary carrier in the cell; or

The network side sends the random access information of the target carrier configured by the network side to the terminal to the terminal by using a handover command.
A terminal, wherein the terminal comprises:

a receiving module, configured to receive random access information of a carrier that can initiate random access, where the carrier that can initiate random access includes a primary carrier and a secondary carrier;

And an access module, configured to select, according to the random access information, a carrier to initiate random access from a carrier that can initiate random access.
The terminal according to claim 22, wherein the random access information comprises at least one of the following: attribute information of a carrier that can initiate random access, and random access of a carrier that can initiate random access. Channel configuration information, and physical random access channel configuration information of a carrier that can initiate random access.
The terminal according to claim 23, wherein the random access information further comprises:

Identification information for indicating a correspondence between random access channel configuration information and/or physical random access channel configuration information and a carrier that can initiate random access.
The terminal according to claim 23, wherein the random access information further comprises:

a bitmap identifier indicating whether the random access channel configuration information of the secondary carrier that can initiate the random access is the same as the random access channel configuration information of the primary carrier, and/or the secondary carrier used to indicate the secondary carrier that can initiate the random access Whether the physical random access channel configuration information and the physical random access channel configuration information of the primary carrier are the same bitmap identifier;

or

A bitmap identifier indicating whether the random access channel configuration information and the physical random access channel configuration information of the secondary carrier that can initiate random access are the same as the random access channel configuration information and the physical random access channel configuration information of the primary carrier .
The terminal according to claim 23, wherein the attribute information of the secondary carrier that can initiate random access includes at least one of the following information:

The downlink working frequency and/or the uplink working frequency of the carrier that can initiate the random access, the index of the carrier that can initiate the random access, and the bitmap configuration information of the downlink available subframe of the carrier that can initiate the random access, can be initiated. The downlink interval configuration of the randomly accessed carrier and the in-band carrier information of the carrier that can initiate random access.
The terminal according to claim 23, wherein the random access channel configuration information of the carrier that can initiate random access includes at least one of the following information:

The maximum number of transmissions of the random access sequence, the power increment parameter, the random access channel list, and the additional offset of cell selection or reselection when the radio resource control RRC connection setup fails.
The terminal according to claim 23, wherein the physical random access channel configuration information of the carrier that can initiate random access includes at least one of the following information:

a cyclic prefix length of a physical random access channel, a list of information of a reference signal reception level threshold, and a parameter list of a physical random access channel;

The parameter list includes a period of a physical random access channel, an initial time of a physical random access channel, a subcarrier offset of a physical random access channel, and at least a number of subcarriers of a physical random access channel. One parameter.
The terminal according to any one of claims 22 to 28, wherein if the terminal is in an RRC idle state, the terminal needs to establish an RRC connection, or the terminal resumes an RRC connection; to:

Determining a carrier that receives the paging; determining, from the random access information, random access information of the carrier that receives the paging, and according to the random access information of the carrier that receives the paging, in the receiving Random access is initiated on the carrier of the call.
The terminal according to any one of claims 22 to 28, wherein the access module is specifically configured to:

Receiving indication signaling for instructing the terminal to initiate random access on the physical downlink control channel PDCCH on any carrier that can initiate random access;

Determining, from the random access information, random access information of any carrier that can initiate random access, and according to any random access information of the carrier that can initiate random access, a carrier that can initiate random access On, initiate random access.
The terminal according to any one of claims 22 to 28, wherein the access module is specifically configured to: if the terminal is in an RRC connected state, or the terminal has uplink data to arrive at a random access; the access module is specifically configured to:

Determining random access information of the secondary carrier configured by the network side for the terminal from the random access information, and initiating, on the network side, the secondary carrier configured for the terminal, according to the determined random access information, Random access.
The terminal according to any one of claims 22 to 28, wherein the access module is specifically configured to:

Determining a target cell and a target carrier configured by the network side according to the handover command sent by the network side; and performing random access on the target cell on the target carrier according to the random access information of the target carrier.
The terminal according to claim 32, wherein the receiving module is specifically configured to:

Receiving random access information of the target carrier by using the handover command; or

And receiving random access information of a carrier that can initiate random access in the target cell, and determining random access information of the target carrier from the random access information.
The terminal according to any one of claims 22 to 28, wherein the terminal is in an RRC connected state and moves to an edge of a current cell; or the terminal is in an RRC connection reestablishment state; For: determining a target cell;

Determining a carrier that receives a paging in the target cell, and determining, in the random access information, random access information of a carrier that receives a paging in the target cell, according to the determined random access information, Determining random access on the carrier that receives the paging in the target cell; or randomly selecting the carrier that can be initiated by the terminal and the network side to initiate random access, and determining the selected carrier from the random access information Random access information, and according to the determined random access information, initiate random access on the selected carrier;

The receiving module is specifically configured to: receive random access information of a carrier that can initiate random access in the target cell.
A network side device, where the network side device includes:

a sending module, configured to send random access information of a carrier that can initiate random access to a terminal, where the carrier that can initiate random access includes a primary carrier and a secondary carrier;

The receiving module is configured to receive random access of the terminal on any carrier that can initiate random access.
The device according to claim 35, wherein the random access information comprises at least one of the following: attribute information of a carrier that can initiate random access, and random access of a carrier that can initiate random access. Channel configuration information, and physical random access channel configuration information of a carrier that can initiate random access.
The device according to claim 36, wherein the random access information further comprises:

Identification information for indicating a correspondence between random access channel configuration information and/or physical random access channel configuration information and a carrier that can initiate random access.
The device according to claim 36, wherein the random access information further comprises:

a bitmap identifier indicating whether the random access channel configuration information of the secondary carrier that can initiate the random access is the same as the random access channel configuration information of the primary carrier, and/or the secondary carrier used to indicate the secondary carrier that can initiate the random access Whether the physical random access channel configuration information and the physical random access channel configuration information of the primary carrier are the same bitmap identifier;

or

A bitmap identifier indicating whether the random access channel configuration information and the physical random access channel configuration information of the secondary carrier that can initiate random access are the same as the random access channel configuration information and the physical random access channel configuration information of the primary carrier .
The device according to claim 36, wherein the attribute information of the carrier that can initiate random access comprises at least one of the following information:

The downlink working frequency and/or the uplink working frequency of the carrier that can initiate the random access, the index of the carrier that can initiate the random access, and the bitmap configuration information of the downlink available subframe of the carrier that can initiate the random access, can be initiated. The downlink interval configuration of the randomly accessed carrier and the in-band carrier information of the carrier that can initiate random access.
The device according to claim 36, wherein the random access channel configuration information of the carrier that can initiate random access comprises at least one of the following information:

The maximum number of transmissions of the random access sequence, the power increment parameter, the random access channel list, and the additional offset of cell selection or reselection when the radio resource control RRC connection setup fails.
The device according to claim 36, wherein the physical random access channel configuration information of the carrier that can initiate random access comprises at least one of the following information:

a cyclic prefix length of a physical random access channel, a list of information of a reference signal reception level threshold, and a parameter list of a physical random access channel;

The parameter list includes a period of a physical random access channel, an initial time of a physical random access channel, a subcarrier offset of a physical random access channel, and at least a number of subcarriers of a physical random access channel. One parameter.
The device according to any one of claims 35 to 41, wherein the sending module is specifically configured to:

Sending random access information of a carrier that can initiate random access to the terminal by using system information of the primary carrier in the cell; or

The random access information of the target carrier configured by the network side device for the terminal is sent to the terminal by using a handover command.
A terminal, characterized in that the terminal comprises a transceiver and at least one processor connected to the transceiver, wherein:

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

Receiving, by the transceiver, random access information of a carrier that can initiate random access, where the carrier that can initiate random access includes a primary carrier and a secondary carrier; and according to the random access information, a random access may be initiated In the carrier, select one Carriers initiate random access;

The transceiver is configured to receive and transmit data under the control of the processor.
A network side device, the network side device comprising: a transceiver, and at least one processor connected to the transceiver, wherein:

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

Controlling, by the transceiver, random access information of a carrier that can initiate random access, to the terminal, where the carrier that can initiate random access includes a primary carrier and a secondary carrier;

Receiving, by the transceiver, random access of the terminal on any carrier that can initiate random access;

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