CN113141667B

CN113141667B - Random access method, information processing device, terminal and network equipment

Info

Publication number: CN113141667B
Application number: CN202010055417.3A
Authority: CN
Inventors: 谢芳; 刘光毅
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2020-01-17
Filing date: 2020-01-17
Publication date: 2023-05-09
Anticipated expiration: 2040-01-17
Also published as: CN113141667A

Abstract

The embodiment of the invention provides a random access method, an information processing method, a device, a terminal and network side equipment, wherein the method comprises the following steps: cell selection is performed under the condition that part or all of CHO configuration of the terminal is unavailable; if the target cell selected by the terminal belongs to a first CHO candidate target base station or cell of CHO configuration, accessing the target cell by adopting the CHO configuration corresponding to the first CHO candidate target base station or cell or random access resources in the CHO configuration; according to the embodiment of the invention, when the terminal triggers the reestablishment flow, the terminal is quickly accessed to the CHO candidate target base station or the cell according to the CHO configuration, or the terminal reports the related information of the CHO configuration in the reestablishment process or after the reestablishment is completed, so that the terminal can help other CHO candidate target base stations or cells to release the special random access resource reserved for the terminal as soon as possible, or help the CHO candidate target base stations or cells for which the CHO configuration is unavailable to optimize the subsequent configuration.

Description

Random access method, information processing device, terminal and network equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a random access method, an information processing device, a terminal, and a network side device.

Background

Conditional handover (Conditional Hand Over, CHO) is a mechanism to enhance the robustness of the handover procedure, avoiding that the terminal cannot normally complete the handover procedure when the channel between the terminal and the serving cell suddenly gets worse (especially at high frequencies or when the terminal moves at high speed). Therefore, the base station can configure the terminal to trigger measurement reporting at a lower threshold, and carry a higher threshold for triggering switching in the switching command, and also can carry random access resources used by the terminal in the target cell, and once the switching threshold is met, the terminal initiates a random access process to the target base station.

After the terminal receives the CHO configuration information carried in the reconfiguration information, it detects the availability (company check) of the CHO information. If it is detected that some configurations of CHO are not available, for example, a Random Access Channel (RACH) Occasion (RO) label of a random access channel (Random Access Channel, RACH) resource where the terminal cannot identify a certain candidate target cell configuration, a Bandwidth part (BWP) where the terminal does not support a dedicated random access resource, or that the CHO related configuration exceeds the terminal capability, the terminal directly triggers the reestablishment procedure.

Because the reestablishment process is initiated by the terminal and the source cell is not notified, the source cell does not know when and why the terminal initiates the reestablishment process, and further cannot know which CHO configurations are not available, so that the candidate target cell cannot avoid similar problems or optimize in the subsequent CHO configurations; moreover, all candidate target cells do not know that the terminal has left, and still keep reserving a dedicated Cell radio network temporary identifier (C-RNTI) and random access resources for the terminal, which causes waste of network side resources.

On the other hand, since the first step of the reestablishment procedure is to perform cell selection, the terminal may select a CHO candidate target cell configured in advance by the source cell, and access the target cell by using a contention-based access procedure according to the existing mechanism. This may result in collisions, reducing the effectiveness of the random access and increasing the time delay of the random access procedure.

Disclosure of Invention

The embodiment of the invention aims to provide a random access method, an information processing device, a terminal and network side equipment, so as to solve the problem that the terminal random access speed is low or network side resource is wasted when terminal reestablishment flow is triggered by the unavailable CHO configuration in the prior art.

In order to achieve the above object, the present invention provides a random access method, applied to a terminal, comprising:

cell selection is carried out under the condition that the conditional switching CHO configuration of the terminal is partially or completely unavailable;

if the target cell selected by the terminal belongs to a first CHO candidate target base station or cell of CHO configuration, accessing the target cell by adopting the CHO configuration corresponding to the first CHO candidate target base station or cell or random access resource in the CHO configuration.

And the first CHO candidate target base station or the cell is available in corresponding CHO configuration, or the first CHO candidate target base station or the cell is available in random access resource in corresponding CHO configuration.

Wherein, the random access resources in the CHO configuration corresponding to the first CHO candidate target base station or cell are: and the first CHO candidate target base station or cell is a special random access resource configured by the terminal.

The embodiment of the invention also provides an information processing method, which is applied to the terminal and comprises the following steps:

and sending the related information of the conditional switching CHO configuration to the first network side equipment.

Wherein the information about the CHO configuration includes an indication that the CHO configuration is partially or wholly unavailable.

Wherein, the related information of the CHO configuration is carried by a radio resource control RRC reestablishment request or a radio link failure RLF report or a target message.

Wherein the RRC reestablishment request or RLF report or target message also carries:

a reestablishment cause or a connection failure cause or a radio link failure cause, the reestablishment cause or the connection failure cause or the radio link failure cause being: CHO configurations are partially or wholly unavailable.

Wherein, the related information of the CHO configuration includes at least one of the following:

identification information of CHO candidate target base stations or cells;

a CHO candidate target base station or a cell reserves a special cell radio network temporary identifier C-RNTI for a terminal;

the CHO configures the frequency point information of unavailable CHO candidate target base station or district;

CHO configures identification information of unavailable CHO candidate target base stations or cells;

the CHO configures a C-RNTI reserved for a terminal by an unavailable CHO candidate target base station or cell;

the CHO configures unavailable information of the unavailable CHO candidate target base stations or cells.

Wherein the unavailable information of the CHO candidate target base station for which CHO configuration is unavailable comprises at least one of the following:

a random access preamble;

a random access opportunity;

Bandwidth part BWP;

CHO configurations exceed termination capability.

The embodiment of the invention also provides an information processing method, which is applied to the first network side equipment and comprises the following steps:

and receiving the related information of the conditional switching CHO configuration sent by the terminal.

identification information of CHO candidate target base stations or cells;

Wherein the unavailable information of the CHO candidate target base station or cell for which CHO configuration is unavailable comprises at least one of the following:

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

The embodiment of the invention also provides an information processing method applied to the first network side device or the second network side device, comprising the following steps:

and sending first indication information to third network side equipment, wherein the first indication information is used for indicating the terminal to be rebuilt or connected to the first network side equipment, and the first indication information carries identification information of the terminal.

The first indication information also carries information related to the conditional switching CHO configuration of the terminal.

identification information of CHO candidate target base stations or cells;

Wherein the non-availability information of the CHO candidate target base station or cell for which CHO configuration is not available includes at least one of:

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

The embodiment of the invention also provides an information processing method applied to the third network side equipment, comprising the following steps:

receiving first indication information sent by first network side equipment or second network side equipment; the first indication information is used for indicating the terminal to be rebuilt to or connected to the first network side equipment, and the first indication information carries the identification information of the terminal.

Wherein the method further comprises:

and releasing the special random access resource reserved for the terminal according to the first indication information.

Identification information of CHO candidate target base stations or cells;

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

and sending second indication information to second network side equipment, wherein the second indication information is used for indicating the terminal to be rebuilt to or connected to the first network side equipment.

Wherein the second indication information carries: indication that CHO configuration is partially or wholly unavailable.

Wherein the indication that the CHO configuration is partially or completely unavailable is carried by a reestablishment cause or a connection failure cause.

Wherein the second indication information further carries: part or all of the information related to CHO configuration of the terminal.

Wherein the second indication information further carries: identification information of the terminal.

identification information of CHO candidate target base stations or cells;

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

The embodiment of the invention also provides an information processing method applied to the second network side equipment, comprising the following steps:

and receiving second indication information sent by the first network side equipment, wherein the second indication information is used for indicating the terminal to be rebuilt to or connected with the first network side equipment.

identification information of CHO candidate target base stations or cells;

a random access preamble;

a random access opportunity;

Bandwidth part BWP;

CHO configurations exceed termination capability.

and sending fourth indication information to fourth network side equipment, wherein the fourth indication information is used for indicating that CHO configuration of the fourth network side equipment is unavailable.

Wherein the fourth indication information carries at least one of the following:

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

The embodiment of the invention also provides an information processing method which is applied to the fourth network side equipment and comprises the following steps:

and receiving fourth indication information sent by the first network side equipment or the second network side equipment, wherein the fourth indication information is used for indicating that CHO configuration of the fourth network side equipment is unavailable.

non-availability information of CHO candidate target base station or cell for which CHO configuration is not available

Wherein the method further comprises:

and optimizing the CHO configuration of the fourth network side equipment according to the fourth indication information.

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

The embodiment of the invention also provides a random access device, which is applied to the terminal and comprises:

a selecting module, configured to perform cell selection when the conditional switch CHO configuration of the terminal is partially or completely unavailable;

and the access module is used for accessing the target cell by adopting the CHO configuration corresponding to the first CHO candidate target base station or the cell or the random access resource in the CHO configuration if the target cell selected by the terminal belongs to the first CHO candidate target base station or the cell of the CHO configuration.

The embodiment of the invention also provides a terminal, which comprises a processor and a transceiver, wherein the transceiver is used for receiving and transmitting data under the control of the processor, and the processor is used for executing the following operations:

The embodiment of the invention also provides an information processing device, which is applied to the terminal and comprises:

and the first sending module is used for sending the related information of the conditional switching CHO configuration to the first network side equipment.

The embodiment of the invention also provides an information processing device, which is applied to the first network side equipment and comprises:

and the first receiving module is used for receiving the related information of the conditional switching CHO configuration sent by the terminal.

The embodiment of the invention also provides a network side device, which is a first network side device, and comprises a processor and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, and the processor is used for executing the following operations:

The embodiment of the invention also provides an information processing device, which is applied to the first network side equipment or the second network side equipment and comprises:

the second sending module is used for sending first indication information to the third network side equipment, the first indication information is used for indicating the terminal to be rebuilt or connected to the first network side equipment, and the first indication information carries the identification information of the terminal.

The embodiment of the invention also provides a network side device, which is a second network side device or a third network side device, and comprises a processor and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, and the processor is used for executing the following operations:

The embodiment of the invention also provides an information processing device, which is applied to third network side equipment and comprises:

the second receiving module is used for receiving first indication information sent by the first network side equipment or the second network side equipment; the first indication information is used for indicating the terminal to be rebuilt to or connected to the first network side equipment, and the first indication information carries the identification information of the terminal.

The embodiment of the invention also provides a network side device, which is a third network side device, and comprises a processor and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, and the processor is used for executing the following operations:

and the third sending module is used for sending second indicating information to second network side equipment, wherein the second indicating information is used for indicating the terminal to be rebuilt to or connected to the first network side equipment, and the second network side equipment is a source base station of the terminal.

and sending second indication information to second network side equipment, wherein the second indication information is used for indicating the terminal to be rebuilt to or connected to the first network side equipment, and the second network side equipment is a source base station of the terminal.

The embodiment of the invention also provides an information processing device, which is applied to the second network side equipment and comprises:

and the third receiving module is used for receiving second indication information sent by the first network side equipment, and the second indication information is used for indicating the terminal to be rebuilt to or connected to the first network side equipment.

The embodiment of the invention also provides a network side device, which is a second network side device, and comprises a processor and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, and the processor is used for executing the following operations:

a fourth sending module, configured to send fourth indication information to a fourth network side device, where the fourth indication information is used to indicate that CHO configuration of the fourth network side device is unavailable; and the fourth indication information carries the unavailable information of the CHO configuration of the fourth network side equipment.

The embodiment of the invention also provides a network side device, which is a first network side device or a second network side device, and comprises a processor and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, and the processor is used for executing the following operations:

transmitting fourth indication information to fourth network side equipment, wherein the fourth indication information is used for indicating that CHO configuration of the fourth network side equipment is unavailable; and the fourth indication information carries the unavailable information of the CHO configuration of the fourth network side equipment.

The embodiment of the invention also provides an information processing device, which is applied to fourth network side equipment and comprises:

a fourth receiving module, configured to receive fourth indication information sent by the first network side device or the second network side device, where the fourth indication information is used to indicate that CHO configuration of the fourth network side device is unavailable; and the fourth indication information carries the unavailable information of the CHO configuration of the fourth network side equipment.

The embodiment of the invention also provides a network side device, which is a fourth network side device, and comprises a processor and a transceiver, wherein the transceiver receives and transmits data under the control of the processor, and the processor is used for executing the following operations:

receiving fourth indication information sent by the first network side equipment or the second network side equipment, wherein the fourth indication information is used for indicating that CHO configuration of the fourth network side equipment is unavailable; and the fourth indication information carries the unavailable information of the CHO configuration of the fourth network side equipment.

The embodiment of the invention also provides communication equipment, which comprises a memory, a processor and a program stored in the memory and capable of running on the processor, wherein the processor realizes the random access method when executing the program; alternatively, the processor may implement the information processing method as described above when executing the program.

The embodiment of the present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps in a random access method as described above; alternatively, the program when executed by a processor implements the steps in the information processing method as described above.

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

in the random access method, the information processing method, the device, the terminal and the network side equipment provided by the embodiment of the invention, under the condition that part or all of CHO configuration of the terminal is unavailable, the terminal rapidly accesses the CHO candidate target base station or the cell according to the CHO configuration when triggering the reestablishment flow, or the terminal reports related information of the CHO configuration in the reestablishment process or after the reestablishment is completed, thereby helping other CHO candidate target base stations or cells to release special random access resources reserved for the terminal as soon as possible, or helping the CHO candidate target base stations or cells with unavailable CHO configuration to optimize subsequent configuration.

Drawings

Fig. 1 shows a flow chart of steps of a random access method according to an embodiment of the present invention;

FIG. 2 is a flowchart showing steps of an information processing method according to an embodiment of the present invention;

FIG. 3 is a flowchart showing a second step of the information processing method according to the embodiment of the present invention;

FIG. 4 is a flowchart illustrating a third step of the information processing method according to the embodiment of the present invention;

FIG. 5 is a flowchart showing steps of an information processing method according to an embodiment of the present invention;

FIG. 6 is a flowchart showing steps of an information processing method according to an embodiment of the present invention;

FIG. 7 is a flowchart showing steps of an information processing method according to an embodiment of the present invention;

FIG. 8 is a flowchart showing steps of an information processing method according to an embodiment of the present invention;

FIG. 9 is a flowchart illustrating steps of an information processing method according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a random access device according to an embodiment of the present invention;

fig. 11 shows a schematic structural diagram of a terminal according to an embodiment of the present invention;

fig. 12 is a schematic diagram showing a configuration of an information processing apparatus according to an embodiment of the present invention;

FIG. 13 is a schematic diagram showing a second configuration of an information processing apparatus according to an embodiment of the present invention;

fig. 14 is a schematic structural diagram of a network side device according to an embodiment of the present invention;

FIG. 15 is a third schematic diagram of an information processing apparatus according to an embodiment of the present invention;

FIG. 16 is a diagram showing a fourth configuration of an information processing apparatus according to an embodiment of the present invention;

FIG. 17 is a diagram showing a fifth embodiment of an information processing apparatus;

FIG. 18 is a diagram showing a sixth embodiment of an information processing apparatus;

FIG. 19 is a schematic diagram showing a structure of an information processing apparatus according to an embodiment of the present invention;

Fig. 20 shows a schematic structural diagram of an information processing apparatus according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, an embodiment of the present invention provides a random access method, which is applied to a terminal, and includes:

step 11, in case that the conditional switch CHO configuration of the terminal is partially or completely unavailable, cell selection is performed.

In the step, terminal CHO configuration is configured by network side equipment for the terminal, and when the terminal discovers that part or all of the CHO configuration is unavailable, a reestablishment flow is initiated, wherein the first step is cell selection.

And step 12, if the target cell selected by the terminal belongs to a first CHO candidate target base station or cell of CHO configuration, accessing the target cell by adopting CHO configuration corresponding to the first CHO candidate target base station or cell or random access resource in CHO configuration.

In this step, the CHO configuration of the terminal includes a plurality of CHO candidate target base stations or cells. If the target cell selected by the terminal belongs to one of CHO candidate target base stations or cells (for example, a first CHO candidate target base station or cell) configured by CHO, the terminal accesses the target cell by adopting CHO configuration corresponding to the first CHO candidate target base station or cell, or the terminal accesses the target cell by adopting random access resources in CHO configuration corresponding to the first CHO candidate target base station or cell.

If the target cell selected by the terminal is not one of the CHO candidate target base station or the cell configured by CHO, the terminal initiates a contention-based random access procedure to access the target cell.

Optionally, the CHO configuration corresponding to the first CHO candidate target base station or cell is available, or the random access resource in the CHO configuration corresponding to the first CHO candidate target base station or cell is available.

As an optional embodiment, the random access resources in the CHO configuration corresponding to the first CHO candidate target base station or cell are: and the first CHO candidate target base station or cell is a special random access resource configured by the terminal.

Because the first CHO candidate target base station or cell configures a special random access resource for the terminal, the terminal uses the special random access resource to access the target cell, so that the collision can be reduced, and the random access speed can be improved.

In the embodiment of the invention, under the condition that part or all of CHO configuration of the terminal is unavailable, if the target cell selected by the terminal triggering the reestablishment process is the CHO candidate target base station or cell, a special random access resource can be adopted to access the cell, so that the random access speed of the terminal can be improved.

As shown in fig. 2, an embodiment of the present invention further provides an information processing method, which is applied to a terminal, including:

And step 21, sending the related information of the conditional switching CHO configuration to the first network side equipment.

Optionally, the first network side device reestablishes the terminal to the target base station or the target cell. And the terminal sends related information of the CHO configuration to the first network side equipment after the reestablishment process or the reestablishment is completed, for example, the related information of the CHO configuration is carried by a Radio Resource Control (RRC) reestablishment request or a Radio Link Failure (RLF) report or a target message.

The target message may be an existing other message or a newly defined message, which is not specifically limited herein.

As an alternative embodiment, the information about the CHO configuration includes an indication that some or all of the CHO configuration is not available.

As another alternative embodiment, the RRC reestablishment request or RLF report or target message also carries:

As another alternative embodiment, the CHO configuration related information includes at least one of:

identification information of CHO candidate target base stations or cells; for example, a physical cell identity PCI or NR cell global identity NCGI; identification information of CHO candidate target base stations or cells for which CHO configurations are available may be included;

CHO configures identification information of unavailable CHO candidate target base stations or cells; for example, a physical cell identity PCI or NR cell global identity NCGI;

Optionally, the unavailable information (i.e. specific unavailable information) of the CHO candidate target base station for which CHO configuration is unavailable includes at least one of the following:

a random access preamble (preamble code);

a random access opportunity RO;

bandwidth part BWP;

CHO configurations exceed termination capability.

In the embodiment of the invention, the terminal reports the related information of the CHO configuration in the reestablishment process or after the reestablishment is completed, so that the network side can release the special random access resource configured for the terminal and/or optimize the subsequent configuration of the CHO according to the related information of the CHO configuration.

As shown in fig. 3, an embodiment of the present invention provides an information processing method, which is applied to a first network side device, and includes:

And step 31, receiving the related information of the conditional switching CHO configuration sent by the terminal. Optionally, the first network side device reestablishes the terminal to the target base station or cell. And the terminal sends related information of the CHO configuration to the first network side equipment after the reestablishment process or the reestablishment is completed, for example, the related information of the CHO configuration is carried by a Radio Resource Control (RRC) reestablishment request or a Radio Link Failure (RLF) report or a target message.

a random access preamble (preamble code);

a random access opportunity RO;

bandwidth part BWP;

CHO configurations exceed termination capability.

As shown in fig. 4, an embodiment of the present invention further provides an information processing method, which is applied to a first network side device or a second network side device, including:

Step 41, sending first indication information to the third network side device, where the first indication information is used to indicate that the terminal is rebuilt to or connected to the first network side device, and the first indication information carries identification information of the terminal.

Optionally, the first network side device is a target base station or a target cell rebuilt by the terminal, and the second network side device is a source base station or a source cell accessed before the terminal initiates the rebuilding process. The third network side equipment is a CHO candidate target base station or cell contained in the CHO configuration. If the target base station or the target cell reconstructed by the terminal is one of the first CHO candidate target base stations or cells, the third network side device is another CHO candidate target base station or cell except the first CHO candidate target base station or cell.

For example, the identification information of the terminal carried by the first indication information is a dedicated C-RNTI allocated to the terminal by the corresponding CHO candidate target base station or cell, so as to facilitate the CHO candidate target base station or cell to identify the terminal.

As an alternative embodiment, the first indication information further carries information about a conditional switch CHO configuration of the terminal.

a random access preamble (preamble code);

a random access opportunity RO;

bandwidth part BWP;

CHO configurations exceed termination capability.

In the embodiment of the invention, the terminal reports the related information of the CHO configuration to the first network side equipment in the reestablishment process or after the reestablishment is completed, and the first network side equipment or the second network side equipment sends the information to the third network side equipment, so that the third network side equipment can release the special random access resource configured for the terminal and/or optimize the subsequent configuration of the CHO according to the related information of the CHO configuration.

As shown in fig. 5, an embodiment of the present invention further provides an information processing method, which is applied to a third network side device, including:

step 51, receiving first indication information sent by a first network side device or a second network side device; the first indication information is used for indicating the terminal to be rebuilt to or connected to the first network side equipment, and the first indication information carries the identification information of the terminal.

Further, in the above embodiment of the present invention, the method further includes:

A random access preamble (preamble code);

a random access opportunity RO;

bandwidth part BWP;

CHO configurations exceed termination capability.

In the embodiment of the invention, the third network side equipment receives the first indication information, and releases the special random access resource configured for the terminal and/or optimizes the subsequent configuration of CHO according to the first indication information.

As shown in fig. 6, an embodiment of the present invention further provides an information processing method, applied to a first network side device, including:

step 61, sending second indication information to a second network side device, where the second indication information is used to indicate the terminal to reestablish or connect to the first network side device.

Optionally, the first network side device is a target base station or a target cell rebuilt by the terminal, and the second network side device is a source base station or a source cell accessed before the terminal initiates the rebuilding process.

Optionally, the second indication information carries: indication that CHO configuration is partially or wholly unavailable.

For example, the indication that the CHO configuration is partially or completely unavailable is carried by the reestablishment cause or the connection failure cause.

As an alternative embodiment, the second indication information further carries: part or all of the information related to CHO configuration of the terminal.

As another alternative embodiment, the second indication information further carries: identification information of the terminal. For example, the identification information of the terminal carried by the second indication information is: C-RNTI allocated by the source base station or the source cell for the terminal, or shortMAC-I carried in the RRC reestablishment request, etc., so as to facilitate the second network side equipment to identify the terminal.

a random access preamble (preamble code);

a random access opportunity RO;

bandwidth part BWP;

CHO configurations exceed termination capability.

In the embodiment of the invention, the terminal reports the related information of the CHO configuration to the first network side equipment in the reestablishment process or after the reestablishment is completed, and the first network side equipment indicates the completion of the terminal to the second network side equipment through the second indication information, so that the second network side equipment releases the related resources of the terminal.

As shown in fig. 7, an embodiment of the present invention further provides an information processing method, applied to a second network side device, including:

and step 71, receiving second indication information sent by the first network side equipment, wherein the second indication information is used for indicating the terminal to be rebuilt to or connected with the first network side equipment.

a random access preamble (preamble code);

a random access opportunity RO;

bandwidth part BWP;

CHO configurations exceed termination capability.

As shown in fig. 8, an embodiment of the present invention further provides an information processing method, which is applied to a first network side device or a second network side device, including:

step 81, sending fourth indication information to a fourth network side device, where the fourth indication information is used to indicate that CHO configuration of the fourth network side device is unavailable.

Optionally, the fourth indication information carries at least one of the following:

Optionally, the first network side device is a target base station or a target cell rebuilt by the terminal, and the second network side device is a source base station or a source cell accessed before the terminal initiates the rebuilding process. The fourth network side equipment configures unavailable CHO target candidate base stations or cells for CHO.

Wherein the unavailable information (i.e. specific unavailable information) of the CHO candidate target base station or cell for which CHO configuration is unavailable includes at least one of the following:

a random access preamble (preamble code);

a random access opportunity RO;

bandwidth part BWP;

CHO configurations exceed termination capability.

In the embodiment of the invention, the first network side device or the second network side device sends fourth indication information to the fourth network side device, wherein the fourth indication information is used for indicating that the CHO configuration of the fourth network side device is unavailable, and the fourth indication information carries the unavailable information of the CHO configuration of the fourth network side device, so that the fourth network side device can release the special random access resource configured for the terminal and/or optimize the subsequent configuration of the CHO.

As shown in fig. 9, an embodiment of the present invention provides an information processing method, applied to a fourth network side device, including:

step 91, receiving fourth indication information sent by the first network side device or the second network side device, where the fourth indication information is used to indicate that CHO configuration of the fourth network side device is unavailable.

and optimizing the CHO configuration of the fourth network side equipment according to the fourth indication message.

a random access preamble (preamble code);

a random access opportunity RO;

bandwidth part BWP;

CHO configurations exceed termination capability.

In order to more clearly describe the method provided by the embodiment of the present invention, a specific flow is described below in conjunction with an example.

For example, assuming that the first network side device is a target cell, the second network side device is a source cell, the third network side device is a CHO candidate target cell, and the fourth network side device is a CHO candidate target cell for which CHO configuration is unavailable.

1. The terminal discovers that the CHO configured by the source base station or the source cell has partial or unavailable problems, and initiates a reestablishment flow, wherein the first step is to perform cell selection.

2. And if the target cell selected by the terminal is not one of the candidate target cells of the CHO, initiating a random access process based on competition.

3. If the target cell selected by the terminal is one of candidate target cells of the CHO, and the CHO configuration of the cell is available or the random access configuration in the CHO configuration of the cell is available, the terminal accesses the cell by adopting the CHO configuration corresponding to the cell or the random access resource in the CHO configuration. When the CHO candidate target cell configures the special random access resource for the terminal, the speed of the terminal accessing the target cell can be improved.

4. The terminal initiates an RRC reestablishment request to the target cell and may send an RLF report to the target cell after the reestablishment is completed. Wherein:

1) The terminal adds a reestablishment reason or a connection failure reason or a RLF reason in the RRC reestablishment request or the RLF report: CHO configurations are not available.

2) The terminal reports information related to CHO configuration, such as candidate target cell IDs of CHO (possibly including the IDs of available and unavailable candidate target cells) reserved for the special C-RNTI of the UE; this is done to facilitate the target cell informing other candidate target cells to release the dedicated random access resources reserved for the UE.

3) The terminal reports detailed information that CHO configuration is not available, which may include: the CHO configures frequency points of unavailable candidate target cells, cell IDs, and the cells give the terminal a reserved dedicated C-RNTI, and specific unavailable information, such as preamble codes, RO opportunities, BWP, or super terminal capabilities, or some or all of them.

5. The target cell informs other CHO candidate target cells, and the terminal has been rebuilt or connected to the target cell, wherein the identification information of the terminal can be carried, such as the special C-RNTI allocated by the candidate target cell for the terminal; further, the candidate target cell may also be informed of all or part of the content of relevant information that is not available for CHO configuration of the terminal configuration.

6. The target cell informs the source cell that the terminal has rebuilt to the target cell because CHO configuration is not available.

7. The target cell sends all or part of the content of the related information which is reported by the terminal and is unavailable by the CHO configuration to the source cell, wherein the content can also carry the identification information of the terminal, such as C-RNTI distributed by the source cell to the terminal, shortMAC-I carried in RRC reestablishment request and the like, so as to facilitate the identification of the terminal by the source cell.

8. After the source cell receives the information of the target cell, one of the following operations may be performed:

1) Informing other CHO candidate target cells (i.e., without informing the terminal of the reselected target cell) that the terminal has left, releasing dedicated random access resources reserved for the terminal;

2) The CHO candidate target cell for which CHO configuration is unavailable is notified, which is the CHO configuration of the terminal configuration is unavailable, or further carries specific unavailable information, such as a preamble code, RO opportunity, BWP, or super terminal capability, among others.

9. The other CHO candidate target cells release the random access resources reserved for the terminal according to the information sent by the target cell or the source cell and/or optimize the subsequent relevant configuration according to the information that CHO configuration is not available.

As shown in fig. 10, an embodiment of the present invention further provides a random access device, which is applied to a terminal, including:

A selection module 101, configured to perform cell selection when some or all CHO configurations are unavailable for conditional handover of the terminal;

and the access module 102 is configured to access the target cell by using the CHO configuration or the random access resource in the CHO configuration corresponding to the first CHO candidate target base station or the cell if the target cell selected by the terminal belongs to the first CHO candidate target base station or the cell of the CHO configuration.

Optionally, in the foregoing embodiment of the present invention, a CHO configuration corresponding to the first CHO candidate target base station or cell is available, or a random access resource in a CHO configuration corresponding to the first CHO candidate target base station or cell is available.

Optionally, in the foregoing embodiment of the present invention, the random access resource in the CHO configuration corresponding to the first CHO candidate target base station or cell is: and the first CHO candidate target base station or cell is a special random access resource configured by the terminal.

In the embodiment of the invention, under the condition that part or all of CHO configuration of the terminal is unavailable, if the target cell selected by the terminal triggering the reestablishment flow is the CHO candidate target base station or cell, the random access speed of the terminal can be improved.

It should be noted that, the device provided in the embodiment of the present invention is a device capable of executing the random access method, and all embodiments of the random access method are applicable to the device, and the same or similar beneficial effects can be achieved.

As shown in fig. 11, an embodiment of the present invention further provides a terminal including a processor 110, a transceiver 120, and a user interface 130, the transceiver 120 receiving and transmitting data under the control of the processor 110, the processor 110 being configured to perform the following operations:

It should be noted that, if the terminal provided in the embodiment of the present invention is a terminal capable of executing the random access method, all embodiments of the random access method are applicable to the terminal, and the same or similar beneficial effects can be achieved.

As shown in fig. 12, an embodiment of the present invention further provides an information processing apparatus, applied to a terminal, including:

and the first sending module 121 is configured to send, to the first network side device, information related to the conditional switch CHO configuration.

Optionally, in the above embodiment of the present invention, the information about the CHO configuration includes an indication that the CHO configuration is partially or completely unavailable.

Optionally, in the foregoing embodiment of the present invention, the related information of the CHO configuration is carried by a radio resource control RRC reestablishment request or a radio link failure RLF report or a target message.

Optionally, in the foregoing embodiment of the present invention, the RRC reestablishment request or RLF report or target message further carries:

Optionally, in the foregoing embodiment of the present invention, the information related to CHO configuration includes at least one of the following:

Identification information of CHO candidate target base stations or cells;

Optionally, in the foregoing embodiment of the present invention, the unavailable information of the CHO candidate target base station that is unavailable in CHO configuration includes at least one of the following:

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

It should be noted that, the device provided in the embodiment of the present invention is a device capable of executing the above information processing method, and all embodiments of the above information processing method are applicable to the device, and the same or similar beneficial effects can be achieved.

identification information of CHO candidate target base stations or cells;

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

It should be noted that, if the terminal provided in the embodiment of the present invention is a terminal capable of executing the above information processing method, all embodiments of the above information processing method are applicable to the terminal, and the same or similar beneficial effects can be achieved.

As shown in fig. 13, an embodiment of the present invention further provides an information processing apparatus, applied to a first network side device, including:

the first receiving module 131 is configured to receive information about a conditional switch CHO configuration sent by a terminal.

identification information of CHO candidate target base stations or cells;

Optionally, in the foregoing embodiment of the present invention, the unavailable information of the CHO candidate target base station or cell for which CHO configuration is unavailable includes at least one of the following:

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

As shown in fig. 14, the embodiment of the present invention further provides a network side device, where the network side device is a first network side device, and includes a processor 141 and a transceiver 142, where the transceiver 142 receives and transmits data under the control of the processor 141, and the processor 141 is configured to perform the following operations:

identification information of CHO candidate target base stations or cells;

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

It should be noted that, if the network side device provided in the embodiment of the present invention is a network side device capable of executing the above information processing method, all embodiments of the above information processing method are applicable to the network side device, and the same or similar beneficial effects can be achieved.

As shown in fig. 15, an embodiment of the present invention further provides an information processing apparatus, applied to a first network side device or a second network side device, including:

the second sending module 151 is configured to send first indication information to a third network side device, where the first indication information is used to instruct the terminal to reestablish or connect to the first network side device, and the first indication information carries identification information of the terminal.

Optionally, in the foregoing embodiment of the present invention, the first indication information further carries information related to a conditional switch CHO configuration of the terminal.

identification information of CHO candidate target base stations or cells;

Optionally, in the above embodiment of the present invention, the unavailable information of the CHO candidate target base station or cell for which CHO configuration is unavailable includes at least one of the following:

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

As shown in fig. 14, the embodiment of the present invention further provides a network side device, where the network side device is a second network side device or a third network side device, and includes a processor 141 and a transceiver 142, where the transceiver 142 receives and transmits data under the control of the processor 141, and the processor 141 is configured to perform the following operations:

identification information of CHO candidate target base stations or cells;

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

As shown in fig. 16, an embodiment of the present invention further provides an information processing apparatus, applied to a third network side device, including:

a second receiving module 161, configured to receive first indication information sent by the first network side device or the second network side device; the first indication information is used for indicating the terminal to be rebuilt to or connected to the first network side equipment, and the first indication information carries the identification information of the terminal.

Optionally, in the foregoing embodiment of the present invention, the apparatus further includes:

and the releasing module is used for releasing the special random access resource reserved for the terminal according to the first indication information.

identification information of CHO candidate target base stations or cells;

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

As shown in fig. 14, the embodiment of the present invention further provides a network side device, where the network side device is a third network side device, and includes a processor 141 and a transceiver 142, where the transceiver 142 receives and transmits data under the control of the processor 141, and the processor 141 is configured to perform the following operations:

Optionally, in the foregoing embodiment of the present invention, the processor is further configured to:

identification information of CHO candidate target base stations or cells;

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

As shown in fig. 17, an embodiment of the present invention further provides an information processing apparatus, applied to a first network side device, including:

the third sending module 171 is configured to send second indication information to a second network side device, where the second indication information is used to instruct the terminal to reestablish or connect to the first network side device.

Optionally, in the foregoing embodiment of the present invention, the second indication information carries: indication that CHO configuration is partially or wholly unavailable.

Optionally, in the above embodiment of the present invention, the indication that some or all of the CHO configuration is unavailable is carried by a reestablishment cause or a connection failure cause.

Optionally, in the foregoing embodiment of the present invention, the second indication information further carries: part or all of the information related to CHO configuration of the terminal.

Optionally, in the foregoing embodiment of the present invention, the second indication information further carries: identification information of the terminal.

identification information of CHO candidate target base stations or cells;

A random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

identification information of CHO candidate target base stations or cells;

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

As shown in fig. 18, an embodiment of the present invention further provides an information processing apparatus, applied to a second network side device, including:

the third receiving module 181 is configured to receive second indication information sent by the first network side device, where the second indication information is used to instruct the terminal to reestablish or connect to the first network side device.

identification information of CHO candidate target base stations or cells;

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

As shown in fig. 14, the embodiment of the present invention further provides a network side device, where the network side device is a second network side device, and includes a processor 141 and a transceiver 142, where the transceiver 142 receives and transmits data under the control of the processor 141, and the processor 141 is configured to perform the following operations:

identification information of CHO candidate target base stations or cells;

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

As shown in fig. 19, an embodiment of the present invention further provides an information processing apparatus, applied to a first network side device or a second network side device, including:

a fourth sending module 191, configured to send fourth indication information to a fourth network side device, where the fourth indication information is used to indicate that CHO configuration of the fourth network side device is unavailable;

Optionally, in the foregoing embodiment of the present invention, the fourth indication information carries at least one of the following:

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

As shown in fig. 14, the embodiment of the present invention further provides a network side device, where the network side device is a first network side device or a second network side device, and includes a processor 141 and a transceiver 142, where the transceiver 142 receives and transmits data under the control of the processor 141, and the processor 141 is configured to perform the following operations:

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

As shown in fig. 20, an embodiment of the present invention further provides an information processing apparatus, applied to a fourth network side device, including:

A fourth receiving module 210, configured to receive fourth indication information sent by the first network side device or the second network side device, where the fourth indication information is used to indicate that CHO configuration of the fourth network side device is unavailable.

and the optimizing module is used for optimizing the CHO configuration of the fourth network side equipment according to the fourth indication information.

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

As shown in fig. 14, the embodiment of the present invention further provides a network side device, where the network side device is a fourth network side device, and includes a processor 141 and a transceiver 142, where the transceiver 142 receives and transmits data under the control of the processor 141, and the processor 141 is configured to perform the following operations:

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

The embodiment of the invention also provides a communication device, which is a terminal and comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes each process in the random access method embodiment as described above when executing the program and can achieve the same technical effect, and the repetition is avoided, and the description is omitted here.

The embodiment of the invention also provides a communication device, which is a network side device and comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes each process in the information processing method embodiment as described above when executing the program and can achieve the same technical effect, and the repetition is avoided, and the description is omitted here.

The embodiment of the present invention further provides a computer readable storage medium, on which a computer program is stored, where the program when executed by a processor implements each process in the random access method embodiment described above, and the same technical effects can be achieved, and for avoiding repetition, a detailed description is omitted herein. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.

The embodiment of the present invention further provides a computer readable storage medium, on which a computer program is stored, where the program when executed by a processor implements each process in the embodiment of the information processing method described above, and the same technical effects can be achieved, and for avoiding repetition, a detailed description is omitted herein. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-readable storage media (including, but not limited to, magnetic disk storage and optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block or blocks.

These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.

Claims

1. A random access method applied to a terminal, comprising:

if the target cell selected by the terminal belongs to a first CHO candidate target base station or cell of CHO configuration, accessing the target cell by adopting the CHO configuration corresponding to the first CHO candidate target base station or cell or a random access resource in the CHO configuration;

the method further comprises the steps of:

sending related information of the conditional switching CHO configuration to the first network side equipment; the information about the CHO configuration includes an indication that some or all of the CHO configuration is not available;

the first network side equipment sends first indication information to third network side equipment, wherein the first indication information is used for indicating a terminal to be rebuilt or connected to the first network side equipment, and the first indication information carries identification information of the terminal; transmitting second indication information to second network side equipment by the first network side equipment, wherein the second indication information is used for indicating a terminal to be rebuilt or connected to the first network side equipment; transmitting fourth indication information to fourth network side equipment by the first network side equipment, wherein the fourth indication information is used for indicating that CHO configuration of the fourth network side equipment is unavailable;

The first network side equipment is a target base station or a target cell rebuilt by the terminal, the second network side equipment is a source base station or a source cell accessed before the terminal initiates a rebuilding process, the third network side equipment is a CHO candidate target base station or a cell contained in CHO configuration, and the fourth network side equipment is a CHO target candidate base station or a cell which is unavailable in CHO configuration.

2. The method of claim 1, wherein the CHO configuration corresponding to the first CHO candidate target base station or cell is available or wherein random access resources in the CHO configuration corresponding to the first CHO candidate target base station or cell are available.

3. The method of claim 1, wherein the random access resources in the CHO configuration corresponding to the first CHO candidate target base station or cell are: and the first CHO candidate target base station or cell is a special random access resource configured by the terminal.

4. The method according to claim 1, wherein the CHO configuration related information is carried by radio resource control, RRC, reestablishment request or radio link failure, RLF, report or target message.

5. The method of claim 4, wherein the RRC reestablishment request or RLF report or target message further carries:

6. The method of claim 1, wherein the CHO configuration related information comprises at least one of:

identification information of CHO candidate target base stations or cells;

7. The method of claim 6, wherein the CHO candidate target base station's unavailability information for CHO configurations comprises at least one of:

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

8. An information processing method applied to a first network side device is characterized by comprising the following steps:

Receiving relevant information of conditional switching CHO configuration sent by a terminal; wherein the information about the CHO configuration includes an indication that the CHO configuration is partially or wholly unavailable;

wherein the method further comprises:

sending first indication information to third network side equipment, wherein the first indication information is used for indicating a terminal to be rebuilt or connected to the first network side equipment, and the first indication information carries identification information of the terminal;

transmitting second indication information to second network side equipment, wherein the second indication information is used for indicating a terminal to be rebuilt or connected to the first network side equipment;

transmitting fourth indication information to fourth network side equipment, wherein the fourth indication information is used for indicating that CHO configuration of the fourth network side equipment is unavailable;

9. The method of claim 8, wherein the CHO configuration related information is carried by a radio resource control, RRC, reestablishment request or a radio link failure, RLF, report or a target message.

10. The method according to claim 9, wherein the RRC reestablishment request or RLF report or target message further carries:

11. The method of claim 8, wherein the CHO configuration related information comprises at least one of:

identification information of CHO candidate target base stations or cells;

12. The method of claim 11, wherein the CHO candidate target base station or cell unavailable information for CHO configuration is at least one of:

a random access preamble;

A random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

13. The method of claim 8, wherein the first indication information further carries information related to a conditional handover CHO configuration of the terminal.

14. The method of claim 13, wherein the CHO configuration related information comprises at least one of:

identification information of CHO candidate target base stations or cells;

15. The method of claim 14, wherein the CHO candidate target base station or cell unavailable information for CHO configuration includes at least one of:

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

16. The method of claim 8, wherein the second indication information carries: indication that CHO configuration is partially or wholly unavailable.

17. The method of claim 8, wherein the indication that some or all of the CHO configuration is unavailable is carried by a reestablishment cause or a connection failure cause.

18. The method of claim 8, wherein the second indication information further carries: part or all of the information related to CHO configuration of the terminal.

19. The method of claim 8, wherein the second indication information further carries: identification information of the terminal.

20. The method of claim 18, wherein the CHO configuration related information comprises at least one of:

identification information of CHO candidate target base stations or cells;

21. The method of claim 20, wherein the CHO candidate target base station or cell unavailable information for CHO configuration includes at least one of:

A random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

22. The method of claim 8, wherein the fourth indication information carries at least one of:

23. The method of claim 22, wherein the CHO candidate target base station or cell unavailable information for CHO configuration includes at least one of:

a random access preamble;

a random access opportunity;

bandwidth part BWP;

CHO configurations exceed termination capability.

24. A random access device for use in a terminal, comprising:

an access module, configured to access a target cell if the target cell selected by the terminal belongs to a first CHO candidate target base station or cell configured by CHO, by using a CHO configuration or a random access resource in a CHO configuration corresponding to the first CHO candidate target base station or cell;

The apparatus further comprises:

the first sending module is used for sending related information of the conditional switching CHO configuration to the first network side equipment; the information about the CHO configuration includes an indication that some or all of the CHO configuration is not available;

25. A terminal comprising a processor and a transceiver, the transceiver receiving and transmitting data under the control of the processor, the processor being configured to:

wherein the processor is further configured to perform the following operations:

26. An information processing apparatus applied to a first network side device, comprising:

the first receiving module is used for receiving the related information of the conditional switching CHO configuration sent by the terminal; wherein the information about the CHO configuration includes an indication that the CHO configuration is partially or wholly unavailable;

the apparatus further comprises:

the first sending module is used for sending first indication information to the third network side equipment, wherein the first indication information is used for indicating the terminal to be rebuilt or connected to the first network side equipment, and the first indication information carries the identification information of the terminal;

the second sending module is used for sending second indication information to second network side equipment, wherein the second indication information is used for indicating the terminal to be rebuilt to or connected to the first network side equipment;

the third sending module is used for sending fourth indication information to fourth network side equipment, wherein the fourth indication information is used for indicating that CHO configuration of the fourth network side equipment is unavailable;

27. A network side device, which is a first network side device, and includes a processor and a transceiver, where the transceiver receives and transmits data under the control of the processor, and the processor is configured to perform the following operations:

the processor is also configured to perform the following operations:

28. A communication device comprising a memory, a processor, and a program stored on the memory and executable on the processor; -wherein the processor, when executing the program, implements a random access method according to any of claims 1-7; alternatively, the processor, when executing the program, implements the information processing method according to any one of claims 8 to 23.

29. A computer readable storage medium having stored thereon a computer program, which when executed by a processor realizes the steps in the random access method according to any of claims 1-7; alternatively, the program, when executed by a processor, implements the steps of the information processing method according to any one of claims 8 to 23.