CN113556824B

CN113556824B - Random access method and device

Info

Publication number: CN113556824B
Application number: CN202110535468.0A
Authority: CN
Inventors: 王宇晨; 于海凤; 曹振臻; 王学龙
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-11-17
Filing date: 2017-11-17
Publication date: 2024-04-16
Anticipated expiration: 2037-11-17
Also published as: CN109803436A; CN113556824A; CN109803436B; WO2019096073A1

Abstract

The embodiment of the application discloses a random access method and a device, which relate to the technical field of communication and ensure that a terminal device which is configured with a PUL and at least one SUL and is in a connection state determines an uplink carrier for initiating random access so as to complete random access. The random method is applied to a chip in a terminal device in a connected state and configured with at least two uplink carriers or the terminal device. The method comprises the following steps: receiving first information sent by access network equipment, wherein the first information is used for determining at least one uplink carrier with random access resources in at least two uplink carriers; determining an uplink carrier for initiating random access in at least one uplink carrier with random access resources; random access is initiated on an uplink carrier that initiates random access.

Description

Random access method and device

The present application is a divisional application of the original application with the title of "a random access method and apparatus", having the application number "201711147410.9" at 11/17/2017, wherein the original application is incorporated herein by reference.

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a random access method and device.

Background

In order to meet the high capacity and high rate transmission requirements of mobile communication systems, the fifth generation communication technology (the 5Generation Mobile Communication Technology,5G) system introduces a high frequency band of more than 6 gigahertz (GHz) for communication. In general, the transmission power of the terminal device is low, so when the terminal device is in a cell edge area and uses a high frequency uplink carrier to transmit signals to the base station, the base station may not receive signals transmitted by the terminal device because the high frequency signals have a large transmission loss and a weak penetration capability in the transmission process, but the terminal device may receive signals transmitted by the base station through a high frequency Downlink (DL). Thus, the problem of asymmetrical uplink and downlink coverage occurs.

In order to solve the problem of asymmetric uplink and downlink coverage, at least one low-frequency band, such as a long term evolution (Long Term Evolution, LTE) band, is introduced into the 5G system to assist the terminal device in transmitting uplink data. Here, the original high frequency uplink carrier is referred to as a primary uplink (Primary Uplink PUL), and the newly introduced low frequency uplink carrier is referred to as a secondary uplink (Supplementary Uplink, SUL). Thus, in one cell, the terminal device is configured with one PUL and at least one SUL.

In a scenario that a terminal device is configured with a PUL and at least one SUL in a certain cell, if the terminal device is in an Idle state, the terminal device may determine an uplink carrier initiating random access in the PUL and at least one SUL by determining a size relationship between a reference signal received power (Reference Signal Received Power, RSRP) of a downlink reference signal and a preset RSRP threshold.

However, in a scenario where a terminal device is configured with one PUL and at least one SUL in a certain cell, there is no method for determining how to initiate an uplink carrier of a random access by the terminal device in a Connected state (Connected) so as to implement the random access by the terminal device.

Disclosure of Invention

The embodiment of the application provides a random access method and a device, which can enable a terminal device which is configured with a PUL and at least one SUL and is in a connection state to determine an uplink carrier initiating random access so as to finish random access.

In order to achieve the above purpose, the embodiment of the application adopts the following technical scheme:

in a first aspect, a random access method is provided, which is applied to a chip in a terminal device in a connected state and configured with at least two uplink carriers or the terminal device. Specifically, after receiving first information sent by an access network device and used for determining at least one uplink carrier with random access resources in the at least two uplink carriers, the terminal device (or a chip in the terminal device) determines an uplink carrier initiating random access in the at least one uplink carrier with random access resources, so that the terminal device (or the chip in the terminal device) can initiate random access on the uplink carrier initiating random access.

The first information in the embodiment of the present application is used to determine at least one uplink carrier with a random access resource from at least two uplink carriers configured by a terminal device (or a chip in the terminal device), so that the terminal device (or the chip in the terminal device) can determine at least one uplink carrier with the random access resource according to the first information, and further determine an uplink carrier capable of initiating random access from the at least one uplink carrier with the random access resource, so as to implement that the terminal device (or the chip in the terminal device) completes random access.

Optionally, in a possible implementation manner of the present application, the method for determining an uplink carrier from which random access is initiated in at least one uplink carrier with random access resources is: and receiving second information which is sent by the access network equipment and is used for indicating the uplink carrier for initiating the random access, and determining the uplink carrier for initiating the random access according to the second information.

According to the terminal equipment (or the chip in the terminal equipment) in the embodiment of the application, the uplink carrier for initiating random access is determined according to the indication of the access network equipment, so that the success rate of random access is effectively improved, and the load imbalance in the communication system is reduced.

Optionally, in another possible implementation manner of the present application, the at least two uplink carriers include a first uplink carrier and N second uplink carriers, where N is greater than or equal to 1. In this scenario, if the at least one uplink carrier with the random access resource includes M second uplink carriers of the N second uplink carriers, the uplink carrier initiating the random access is one of the M second uplink carriers, where N is greater than or equal to M and greater than or equal to 1; or if the at least one uplink carrier with the random access resource includes a first uplink carrier, the uplink carrier initiating the random access is the first uplink carrier; or the uplink carrier initiating random access is an uplink carrier configured with physical uplink control channel resources in at least one uplink carrier with random access resources; or the uplink carrier initiating random access is the uplink carrier with the shortest time from the current transmission time in the time domain of the random access resource configured in the at least one uplink carrier with the random access resource; or, the uplink carrier for initiating random access is: and under the condition that the scheduling request fails to trigger the random access process, the uplink carrier where the resource used by the scheduling request is sent in the at least one uplink carrier with the random access resource.

The terminal equipment (or the chip in the terminal equipment) in the embodiment of the application can autonomously determine the uplink carrier for initiating the random access, and can meet the requirement of the terminal equipment (or the chip in the terminal equipment) for initiating the random access.

As can be seen from the above description, the terminal device (or the chip in the terminal device) in the embodiment of the present application may determine the uplink carrier that initiates the random access according to the indication of the access network device, or may autonomously determine the uplink carrier that initiates the random access.

Optionally, in another possible implementation manner of the present application, the at least two uplink carriers include a first uplink carrier and N second uplink carriers, where N is greater than or equal to 1. In addition to the steps described above, the terminal device (or the chip in the terminal device) in the embodiment of the present application also obtains the signal quality of the downlink reference signal sent by the access network device. Thus, if the signal quality of the downlink reference signal is smaller than the signal quality threshold, the at least one uplink carrier with the random access resource includes M second uplink carriers of the N second uplink carriers, the uplink carrier initiating the random access is one of the M second uplink carriers, N is greater than or equal to M is greater than or equal to 1, and the signal quality threshold is received from the access network device.

Optionally, in another possible implementation manner of the present application, the at least two uplink carriers include a first uplink carrier and N second uplink carriers, where N is greater than or equal to 1. In addition to the steps described above, the terminal device (or the chip in the terminal device) in the embodiment of the present application also obtains the signal quality of the downlink reference signal sent by the access network device. Thus, in a scenario where the signal quality of the downlink reference signal is greater than or equal to the signal quality threshold: if the at least one uplink carrier with the random access resource comprises a first uplink carrier, the uplink carrier initiating the random access is the first uplink carrier; or the uplink carrier initiating random access is an uplink carrier configured with physical uplink control channel resources in the at least one uplink carrier with random access resources; or the uplink carrier initiating random access is the uplink carrier with the shortest time from the current transmission time in the time domain of the random access resource configured in the at least one uplink carrier with the random access resource; or, the uplink carrier initiating the random access is an uplink carrier where a resource used by the scheduling request is transmitted in the at least one uplink carrier having the random access resource when the scheduling request fails to trigger the random access process.

It can be seen that the terminal device (or the chip in the terminal device) in the embodiment of the present application may determine the uplink carrier that initiates the random access by determining the magnitude relation between the signal quality of the downlink reference signal and the signal quality threshold.

In this embodiment of the present application, there are various methods for determining, by a terminal device (or a chip in the terminal device), an uplink carrier that initiates random access, which is not specifically limited in this embodiment of the present application.

Optionally, in another possible implementation manner of the present application, before determining an uplink carrier that initiates random access in the at least one uplink carrier with random access resources, the terminal device (or a chip in the terminal device) further receives third information sent by the access network device and used for triggering a random access procedure.

The terminal device (or the chip in the terminal device) in the embodiment of the present application may initiate random access according to the indication of the access network device, or may initiate random access according to the own requirement, which is not specifically limited in the embodiment of the present application.

Optionally, in another possible implementation manner of the present application, the third information is a physical downlink control channel command, where the physical downlink control channel command includes at least one of fourth information and fifth information, the fourth information includes search space location information configured by the access network device for scheduling information of each uplink carrier in at least one uplink carrier with random access resources, and the fifth information includes a radio network temporary identifier (Radio Network Temporary Identifier, RNTI) configured by the access network device for each uplink carrier in at least one uplink carrier with random access resources.

In the scenario that the third information is a physical downlink control channel command, where the physical downlink control channel command includes at least one of fourth information and fifth information, the terminal device (or a chip in the terminal device) can determine, according to at least one of the fourth information and the fifth information, an uplink carrier that initiates random access in the at least one uplink carrier with random access resources. In this way, the terminal device (or the chip in the terminal device) directly initiates random access on the uplink carrier determined by the terminal device (or the chip in the terminal device) and initiating random access according to the third information.

In combination with the foregoing "determining the uplink carrier from which the random access is initiated according to the second information", it can be known that the access network device in the embodiment of the present application may send, to the terminal device (or the chip in the terminal device), information for determining the uplink carrier from which the random access is initiated in a different manner.

Optionally, in another possible implementation manner of the present application, after "determining the uplink carrier from which random access is initiated in the at least one uplink carrier having the random access resource", the terminal device (or a chip in the terminal device) further determines a subband currently activated in the uplink carrier from which random access is initiated, and if the currently activated subband is not a preset subband, the terminal device (or the chip in the terminal device) switches the currently activated subband to the preset subband. In this scenario, the method of "initiating random access on an uplink carrier that initiates random access" described above is: and initiating random access through random access resources in a preset sub-band on an uplink carrier for initiating random access. In some documents, the sub-bands are also called broadband parts (BWP)

The sub-bands in the embodiments of the present application refer to a series of consecutive physical resource blocks or resource blocks in a carrier. The preset sub-band is a sub-band configured with random access resources in advance in an uplink carrier with random access resources in a communication system. The existing standard protocol specifies: the terminal device uses the resources in the currently activated sub-band in the carrier to transmit data. The currently activated sub-band in a certain carrier is not necessarily a preset sub-band. When the current activated sub-band in the uplink carrier initiating the random access is not the preset sub-band, the terminal equipment (or a chip in the terminal equipment) switches the current activated sub-band in the uplink carrier initiating the random access into the preset sub-band, thereby improving the success rate of the random access.

Optionally, in another possible implementation manner of the present application, the terminal device (or a chip in the terminal device) is further configured with a first counter, where the first counter is used to record the number of times of reinitiating the random access; or the terminal equipment (or a chip in the terminal equipment) configures a second counter for each uplink carrier in the at least one uplink carrier with the random access resource, wherein the second counter is used for recording the number of times of reinitiating random access on the corresponding uplink carrier.

Optionally, in another possible implementation manner of the present application, the terminal device (or a chip in the terminal device) is further configured with a third counter and a first preset power ramp step, where the third counter is configured to record a number of times of change of the transmission power when the random access is restarted, and the value of the transmission power is changed based on the first preset power ramp step; or the terminal equipment (or a chip in the terminal equipment) configures a fourth counter and a second preset power ramp step length for each uplink carrier in the at least one uplink carrier with the random access resource respectively, wherein the fourth counter is used for recording the change times of the transmission power when the random access is restarted on the corresponding uplink carrier, and the value of the transmission power is changed based on the second preset power ramp step length corresponding to the uplink carrier used for restarting the random access.

In the embodiment of the present application, when the terminal device (or the chip in the terminal device) initiates random access on the uplink carrier that initiates random access, there may be a failure situation. When the random access initiated by the terminal equipment (or the chip in the terminal equipment) fails, the terminal equipment (or the chip in the terminal equipment) can reinitiate the random access on the uplink carrier initiating the random access, or can also adopt the random access method provided by the embodiment of the application to reselect an uplink carrier initiating the random access, and reinitiate the random access on the reselected uplink carrier initiating the random access.

In a second aspect, a random access device is provided, which is a chip or a terminal device applied in a terminal device in a connected state and configured with at least two uplink carriers. Specifically, the random access device includes a communication unit and a determination unit.

The functions realized by each unit module provided by the application are specifically as follows:

the communication unit is configured to receive first information sent by an access network device, where the first information is used to determine at least one uplink carrier having a random access resource in at least two uplink carriers. The determining unit is configured to determine at least one uplink carrier with a random access resource according to the first information received by the communication unit, and determine an uplink carrier initiating random access from the at least one uplink carrier with a random access resource. The communication unit is further configured to initiate random access on the uplink carrier that initiates random access and is determined by the determining unit.

Optionally, in a possible implementation manner of the present application, the communication unit is further configured to receive second information sent by the access network device, where the second information is used to indicate an uplink carrier that initiates random access. The determining unit is specifically configured to determine, according to the second information received by the receiving unit, an uplink carrier from which random access is initiated.

Optionally, in another possible implementation manner of the present application, the at least two uplink carriers include a first uplink carrier and N second uplink carriers, where N is greater than or equal to 1. In this scenario, the at least one uplink carrier with random access resources includes M second uplink carriers of N second uplink carriers, where the uplink carrier initiating random access is one of the M second uplink carriers, and N is greater than or equal to M and greater than or equal to 1; or the at least one uplink carrier with random access resource includes a first uplink carrier, and the uplink carrier initiating random access is the first uplink carrier; or the uplink carrier initiating random access is an uplink carrier configured with physical uplink control channel resources in at least one uplink carrier with random access resources; or the uplink carrier initiating random access is the uplink carrier with the shortest time from the current transmission time in the time domain of the random access resource configured in the at least one uplink carrier with the random access resource; or, the uplink carrier initiating the random access is an uplink carrier where a resource used by the scheduling request is transmitted in the at least one uplink carrier having the random access resource when the scheduling request fails to trigger the random access process.

Optionally, in another possible implementation manner of the present application, the at least two uplink carriers include a first uplink carrier and N second uplink carriers, where N is greater than or equal to 1. The random access device provided by the embodiment of the application further comprises an acquisition unit, wherein the acquisition unit is used for acquiring the signal quality of the downlink reference signal sent by the access network equipment. If the signal quality of the downlink reference signal is smaller than the signal quality threshold, the at least one uplink carrier with the random access resource includes M second uplink carriers of the N second uplink carriers, the uplink carrier initiating the random access is one of the M second uplink carriers, N is greater than or equal to M is greater than or equal to 1, and the signal quality threshold is received from the access network device.

Optionally, in another possible implementation manner of the present application, the at least two uplink carriers include a first uplink carrier and N second uplink carriers, where N is greater than or equal to 1. The random access device provided by the embodiment of the application further comprises an acquisition unit, wherein the acquisition unit is used for acquiring the signal quality of the downlink reference signal sent by the access network equipment. When the signal quality of the downlink reference signal is greater than or equal to a signal quality threshold, the at least one uplink carrier with random access resources comprises a first uplink carrier, and the uplink carrier initiating random access is the first uplink carrier; or the uplink carrier initiating random access is an uplink carrier configured with physical uplink control channel resources in at least one uplink carrier with random access resources; or the uplink carrier initiating random access is the uplink carrier with the shortest time from the current transmission time in the time domain of the random access resource configured in the at least one uplink carrier with the random access resource; or, the uplink carrier initiating the random access is an uplink carrier where a resource used by the scheduling request is transmitted in the at least one uplink carrier having the random access resource when the scheduling request fails to trigger the random access process.

Optionally, in another possible implementation manner of the present application, the communication unit is further configured to receive third information sent by the access network device before the determining unit determines, in at least one uplink carrier having random access resources, an uplink carrier that initiates random access, where the third information is used to trigger a random access procedure.

Optionally, in another possible implementation manner of the present application, the third information is a physical downlink control channel command, where the physical downlink control channel command includes at least one of fourth information and fifth information, the fourth information includes search space location information configured by the access network device for scheduling information of each uplink carrier in at least one uplink carrier with random access resources, and the fifth information includes RNTI configured by the access network device for each uplink carrier in at least one uplink carrier with random access resources.

Optionally, in another possible implementation manner of the present application, the determining unit is further configured to determine a currently activated subband in the uplink carrier initiating random access after determining the uplink carrier initiating random access in the at least one uplink carrier having random access resources. Correspondingly, the random access device provided in the embodiment of the present application further includes a switching unit, where the switching unit is configured to switch the currently activated subband to a preset subband if the currently activated subband determined by the determining unit is not the preset subband. Correspondingly, the communication unit is specifically configured to initiate random access through the random access resource in the preset subband switched by the switching unit on the uplink carrier initiating random access.

Optionally, in another possible implementation manner of the present application, the random access apparatus provided in this application further includes a first configuration unit, where the first configuration unit is configured to configure a first counter, where the first counter is configured to record a number of times of reinitiating random access, or is configured to configure, for each of the at least one uplink carrier with random access resources, a second counter, where the second counter is configured to record a number of times of reinitiating random access on the corresponding uplink carrier.

Optionally, in another possible implementation manner of the present application, the random access device provided in this application further includes a second configuration unit, where the second configuration unit is configured to configure a third counter and a first preset power ramp step size, the third counter is configured to record a number of times of change of transmission power when the random access is restarted, the value of the transmission power is changed based on the first preset power ramp step size, or is configured to respectively configure a fourth counter and a second preset power ramp step size for each uplink carrier of the at least one uplink carrier with the random access resource, the fourth counter is configured to record a number of times of change of transmission power when the random access is restarted on a corresponding uplink carrier, and the value of the transmission power is changed based on a second preset power ramp step size corresponding to the uplink carrier used for restarting the random access.

In a third aspect, there is provided a terminal device comprising: one or more processors, memory, a communication interface. Wherein the memory, the communication interface, and the one or more processors are coupled; the terminal device communicates with the access network device via a communication interface, the memory being for storing computer program code comprising instructions which, when executed by the one or more processors, cause the terminal device to perform the random access method as described in the first aspect and its various possible implementations.

In a fourth aspect, there is also provided a computer-readable storage medium having instructions stored therein; when run on a terminal device, causes the terminal device to perform the random access method as described in the above first aspect and its various possible implementations.

In a fifth aspect, there is also provided a computer program product comprising instructions which, when run on a terminal device, cause the terminal device to perform the random access method as described in the above first aspect and its various possible implementations.

In this application, the names of the above-mentioned terminal devices do not constitute limitations on the devices or function modules themselves, and in actual implementation, these devices or function modules may appear under other names. Insofar as the function of each device or function module is similar to the present application, it is within the scope of the claims of the present application and the equivalents thereof.

For a detailed description of the second aspect, the third aspect, the fourth aspect, the fifth aspect, and various implementations thereof in this application, reference may be made to the detailed description of the first aspect and various implementations thereof; moreover, the advantages of the second aspect, the third aspect, the fourth aspect, the fifth aspect, and various implementations thereof may be referred to for analysis of the advantages of the first aspect and various implementations thereof, and are not described herein.

In a sixth aspect, a random access method is provided, which is applied to an access network device or a chip in the access network device. Specifically, the access network device (or a chip in the access network device) sends first information for determining at least one uplink carrier with random access resources in at least two uplink carriers to the terminal device, where the terminal device is in a connected state and is configured with the at least two uplink carriers; the access network device (or a chip in the access network device) receives a random access request sent by the terminal device on an uplink carrier initiating random access in the at least one uplink carrier with random access resources.

The first information in the embodiment of the present application is used to determine at least one uplink carrier with random access resources in at least two uplink carriers configured by the terminal device, and the access network device (or a chip in the access network device) sends the first information to the terminal device, so that the terminal device can determine at least one uplink carrier with random access resources according to the first information, and further determine an uplink carrier capable of initiating random access from the at least one uplink carrier with random access resources, so as to implement that the terminal device completes random access.

Optionally, in a possible implementation manner of the present application, the access network device (or a chip in the access network device) further sends second information for indicating the uplink carrier that initiates the random access to the terminal device.

Optionally, in another possible implementation manner of the present application, the access network device (or a chip in the access network device) further sends third information for triggering the random access procedure to the above terminal device.

Optionally, in another possible implementation manner of the present application, the third information is a physical downlink control channel command, where the physical downlink control channel command includes at least one of fourth information and fifth information, the fourth information includes search space location information configured by an access network device for scheduling information of each uplink carrier in the at least one uplink carrier with random access resources, and the fifth information includes RNTI configured by the access network device for each uplink carrier in the at least one uplink carrier with random access resources.

In a seventh aspect, a random access apparatus is provided, which is an access network device or a chip in the access network device. Specifically, the random access device comprises a processing unit, a sending unit and a receiving unit.

the processing unit is configured to determine first information, where the first information is used to instruct a terminal device to determine at least one uplink carrier having a random access resource from at least two uplink carriers, and the terminal device is in a connected state and configured with the at least two uplink carriers. The sending unit is configured to send, to the terminal device, the first information determined by the processing unit, where the terminal device is in a connected state and configured with at least two uplink carriers, and the first information is used to determine at least one uplink carrier having a random access resource in the at least two uplink carriers. The receiving unit is configured to receive a random access request sent by a terminal device on an uplink carrier that initiates random access in the at least one uplink carrier with random access resources.

Optionally, in a possible implementation manner of the present application, the sending unit is further configured to send second information to a terminal device, where the second information is used to indicate an uplink carrier that initiates random access.

Optionally, in another possible implementation manner of the present application, the sending unit is further configured to send third information to the terminal device, where the third information is used to trigger a random access procedure.

An eighth aspect provides an access network device, the access network device comprising: one or more processors, memory, a communication interface. Wherein the memory, the communication interface, and the one or more processors are coupled; the access network device communicates with the terminal device via a communication interface, the memory being adapted to store computer program code comprising instructions which, when executed by the one or more processors, cause the access network device to perform the random access method according to the sixth aspect and its various possible implementations described above.

In a ninth aspect, there is also provided a computer-readable storage medium having instructions stored therein; which when run on an access network device causes the access network device to perform the random access method as described in the sixth aspect and its various possible implementations.

In a tenth aspect, there is also provided a computer program product comprising instructions which, when run on an access network device, cause the access network device to perform the random access method according to the sixth aspect and its various possible implementations described above.

For a detailed description of the seventh aspect, the eighth aspect, the ninth aspect, the tenth aspect, and various implementations thereof in this application, reference may be made to the detailed description of the sixth aspect and various implementations thereof; further, the advantages of the seventh aspect, the eighth aspect, the ninth aspect, the tenth aspect, and the various implementations thereof may be referred to the analysis of the advantages of the sixth aspect and the various implementations thereof, and are not described herein.

These and other aspects of the present application will be more readily apparent from the following description.

Drawings

Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application;

Fig. 2 is another schematic structural diagram of a communication system according to an embodiment of the present application;

fig. 3 is a schematic hardware structure of a smart phone according to an embodiment of the present application;

fig. 4 is a schematic hardware structure of a base station according to an embodiment of the present application;

fig. 5 is a flowchart of a random access method according to an embodiment of the present application;

fig. 6 is a second flowchart of a random access method according to an embodiment of the present application;

fig. 7 is a flowchart of a random access method according to an embodiment of the present application;

fig. 8 is a flow chart diagram of a random access method provided in an embodiment of the present application;

fig. 9 is a flowchart fifth of a random access method provided in an embodiment of the present application;

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

fig. 11 is a schematic structural diagram of a random access device according to an embodiment of the present application;

fig. 12 is a schematic structural diagram III of a random access device according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a random access device according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a random access device according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of an access network device according to an embodiment of the present application.

Detailed Description

In the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

The terms "first" and "second" and the like in the description and in the claims, are used for distinguishing between different objects and not for describing a particular sequential order of objects. For example, the first information and the second information, etc., are used to distinguish different data blocks, and are not used to describe a particular order of data blocks.

In the existing communication system, in order to save the power consumption of the terminal device as much as possible, a plurality of communication states are defined for the terminal device. For example, if the terminal device establishes a communication connection with the base station, it is defined that the terminal device is in a Connected (Connected) state (or Connected mode). If the terminal device is in a standby state, it is defined that the terminal device is in an Idle (Idle) state (or Idle mode).

In the 5G system, high frequency resources are adopted between the base station and the terminal equipment to complete service communication, namely, the carrier waves adopted by the base station and the terminal equipment for transmitting data are high frequency carrier waves. In general, the transmission power of the terminal device is low, so that in the 5G system, when the terminal device is located in a cell edge area and transmits a signal to the base station, the base station may not receive the signal transmitted by the terminal device because the high frequency signal has a large transmission loss and a weak penetration capability in the transmission process, but the terminal device may receive the signal transmitted by the base station through the high frequency downlink. Thus, the problem of asymmetrical uplink and downlink coverage occurs.

In order to solve the problem of asymmetric uplink and downlink coverage, terminal equipment in a 5G system is configured with a PUL and at least one SUL in a certain cell, wherein the frequency band to which the SUL belongs is smaller than the frequency band to which the PUL belongs. The SUL is used for assisting the terminal equipment to transmit uplink data. When the terminal equipment transmits uplink data to the base station by adopting the same transmitting power, the transmission distance is far when the uplink data is transmitted on the PUL compared with the transmission distance when the uplink data is transmitted on the SUL.

It should be noted that, in the present application, the two names of PUL and SUL are only used to distinguish the original high-frequency band uplink carrier from the introduced low-frequency band uplink carrier, and as the communication technology evolves, the names of PUL and SUL may change, which is not limited in detail herein.

In a scenario that the terminal device is configured with a PUL and at least one SUL in a certain cell, the terminal device in Idle state can determine an uplink carrier initiating random access in the PUL and at least one SUL by judging a size relationship between RSRP of a downlink reference signal and a preset RSRP threshold.

As shown in fig. 1, the communication system includes a base station, a terminal device 1, and a terminal device 2, where the base station serves both the terminal device 1 and the terminal device 2, and the terminal device 1 and the terminal device 2 are located in a cell corresponding to the base station, are configured with one PUL and one SUL, and are in Idle states. If the terminal device 1 determines that the RSRP of the downlink reference signal is greater than or equal to the preset RSRP threshold, it indicates that the terminal device 1 is located in the central area of the cell, and at this time, the terminal device 1 may select PUL to initiate random access. If the terminal device 2 determines that the RSRP of the downlink reference signal is smaller than the preset RSRP threshold, it indicates that the terminal device 2 is located in the edge area of the cell, and the terminal device 2 can select the SUL to initiate random access.

However, in a scenario where a terminal device is configured with one PUL and at least one SUL in a certain cell, there is currently no method how a terminal device in a Connected state (Connected) determines an uplink carrier that initiates random access, so as to implement the terminal device to complete random access.

In view of the foregoing, embodiments of the present application provide a random access method applied to a chip in a terminal device in a connected state and configured with at least two uplink carriers or the terminal device. After receiving first information sent by an access network device and used for determining at least one uplink carrier with random access resources in the at least two uplink carriers, a terminal device (or a chip in the terminal device) determines an uplink carrier initiating random access in the at least one uplink carrier with random access resources, so that the terminal device (or the chip in the terminal device) can initiate random access on the uplink carrier initiating random access.

The random access method provided by the embodiment of the application is suitable for a communication system. The communication system may be a 5G system, or may be an LTE system, or may be another communication system configured with at least two uplink carriers for a terminal device, which is not specifically limited in this embodiment of the present application.

Fig. 2 is a schematic structural diagram of a communication system according to an embodiment of the present application. Referring to fig. 2, the communication system includes a plurality of terminal devices and an access network device 21, and data transmission between each terminal device and the access network device 21 may be performed by radio waves, or may be performed by visible light, laser light, infrared light, light quanta, power lines, optical fibers, coaxial cables, copper stranded wires, or the like. Each terminal device is configured with at least two uplink carriers, e.g., at least two uplink carriers including one PUL and at least one SUL.

Fig. 2 shows 6 terminals, terminal 1, terminal 2, terminal 3, terminal 4, terminal 5, terminal 6, respectively. The terminal Device 4, the terminal Device 5 and the terminal Device 6 in fig. 2 also constitute a Device-to-Device (D2D) communication system, and the terminal Device 4 and the terminal Device 6 communicate with the access network Device 21 via the terminal Device 5, respectively.

The terminal device in the embodiment of the present application may refer to a wireless terminal device capable of receiving the scheduling information and the indication information sent by the access network device 21. The wireless terminal device may be a device that provides voice and/or data connectivity to a user, a handheld device with wireless connectivity, or other processing device connected to a wireless modem. For example, the wireless terminal device is an MTU UE.

The wireless terminal device may communicate with one or more core networks via a radio access network (e.g., RAN, english: radio Access Network). The wireless terminal devices may be mobile terminal devices such as mobile phones (or "cellular" phones) and computers with mobile terminal devices, as well as portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices that exchange voice and/or data with a radio access network, e.g., cell phones, tablet computers, notebook computers, netbooks, personal digital assistants (Personal Digital Assistant, PDA). The wireless terminal device may also be referred to as a terminal device.

For example, in the embodiment of the present application, the terminal device shown in fig. 2 may be a smart phone, and each component of the smart phone is specifically described below in conjunction with fig. 3.

As shown in fig. 3, the smart phone includes: a processor 31, a Radio Frequency (RF) circuit 32, a power supply 33, a memory 34, an input unit 35, a display unit 36, an audio circuit 37, and the like.

Those skilled in the art will appreciate that the configuration of the smartphone shown in fig. 3 is not limiting of the smartphone, and may include more or fewer components than those shown in fig. 3, or may combine some of the components shown in fig. 3, or may differ in arrangement of components from those shown in fig. 3.

The processor 31 is a control center of the smart phone, connects various parts of the entire smart phone using various interfaces and lines, and performs various functions and processes data of the smart phone by running or executing software programs and/or modules stored in the memory 34 and calling data stored in the memory 34, thereby performing overall monitoring of the smart phone. Alternatively, the processor 31 may comprise one or more processing units. The processor 31 may integrate an application processor and a modem processor. The application processor mainly processes an operating system, a user interface, an application program and the like; the modem processor primarily handles wireless communications. Alternatively, the application processor and the modem processor may be provided independently of each other, or may be integrated in the same device.

The RF circuit 32 may be used for receiving and transmitting signals during the process of receiving and transmitting information or communication, in particular, after receiving downlink information of the base station, the downlink information is processed by the processor 31; and, the uplink data is transmitted to the base station. Typically, RF circuitry includes, but is not limited to, antennas, at least one amplifier, transceivers, couplers, low noise amplifiers (Low Noise Amplifier, LNAs), diplexers, and the like. In addition, RF circuitry 32 may also communicate with networks and other devices via wireless communications. The wireless communication may use any communication standard or protocol including, but not limited to, global system for mobile communications (Global System of Mobile Communication, GSM), general packet radio service (General Packet Radio Service, GPRS), code division multiple access (Code Division Multiple Access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA), LTE, email, short message service (Short Messaging Service, SMS), etc.

The smartphone includes a power supply 33 (e.g., a battery) for powering the various components, optionally in logical communication with the processor 31 through a power management system, whereby charge, discharge, and power consumption management functions are performed by the power management system.

The memory 34 may be used to store software programs and modules, and the processor 31 performs various functional applications and data processing of the smartphone by running the software programs and modules stored in the memory 34.

The memory 34 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function (such as initiating random access), and the like; the storage data area may store data (such as audio data, phonebook) created according to the use of the smart phone, etc. In addition, memory 34 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.

The input unit 35 may be used to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the smartphone. In particular, the input unit 35 may include a touch screen 351 and other input devices 352.

The touch screen 351, also referred to as a touch panel, may collect touch operations thereon or thereabout by a user (e.g., operations of the user on the touch screen 351 or thereabout using any suitable object or accessory such as a finger, stylus, etc.), and drive the corresponding connection means according to a predetermined program. Alternatively, the touch screen 351 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch azimuth of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch detection device, converts it into touch point coordinates, and sends the touch point coordinates to the processor 31, and can receive and execute commands sent from the processor 31. Further, the touch screen 351 may be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave.

The display unit 36 may be used to display information input by a user or information provided to the user as well as various menus of the smart phone. The display unit 36 may include a display panel 361, and alternatively, the display panel 361 may be configured in the form of a liquid crystal display (Liquid Crystal Display, LCD), an Organic Light-emitting Diode (OLED), or the like.

Further, the touch screen 351 may cover the display panel 361, and when the touch screen 351 detects a touch operation thereon or thereabout, the touch screen is transferred to the processor 31 to determine the type of touch event, and then the processor 3 provides a corresponding visual output on the display panel 361 according to the type of touch event. Although in fig. 3, the touch screen 351 and the display panel 361 are two separate components to implement the input and output functions of the smart phone, in some embodiments, the touch screen 351 and the display panel 361 may be integrated to implement the input and output functions of the smart phone.

Audio circuitry 37, speaker 371, and microphone 372 for providing an audio interface between the user and the smartphone. The audio circuit 37 may transmit the received electrical signal converted from audio data to the speaker 371, and convert the electrical signal into a sound signal to be output by the speaker 371; on the other hand, microphone 372 converts the collected sound signals into electrical signals, which are received by audio circuit 37 and converted into audio data, which are output to RF circuit 32 for transmission to, for example, another smart phone, or to memory 34 for further processing.

Optionally, the smart phone may also include various sensors (e.g., gyroscopic sensors, hygrometric sensors, infrared sensors, or magnetometer sensors), wi-Fi modules, bluetooth modules, housings, etc. Not shown in fig. 3.

The access network device 21 in the embodiment of the present application communicates with each terminal device. The Access network device 21 is a device having a central control function, such as a base station, a hot spot (pico), a Transmission Point (TP), a Relay (Relay), an Access Point (AP), and the like. The Base Station may be a Base Station (BS) for wireless communication, a Base Station controller, or the like.

Specifically, the access network device 21 is a device deployed in a radio access network to provide a wireless communication function for a terminal device, and may be connected to the terminal device, and receive data sent by the terminal device and send the data to the core network device.

The main functions of the access network device include one or more of the following: management of radio resources, compression of internet protocol (Internet Protocol, IP) headers and encryption of user data flows, selection of a mobility management entity (Mobility Management Entity, MME) at the time of terminal device attachment, routing of user plane data to a Service Gateway (SGW), organization and transmission of paging messages, organization and transmission of broadcast messages, measurement and measurement report configuration for mobility or scheduling purposes, and the like.

The name of access network device 21 may vary in systems employing different radio access technologies. For example: in an LTE network (or referred to as a 4 th generation mobile communication technology (the fourth Generation Telecommunication, 4G) system), the access network device 21 is named evolved NodeB, eNB or eNodeB; in the 3 rd generation mobile communication technology (the third Generation Telecommunication, 3G) system, the name of the access network device 21 is a base station (Node B); in the next generation wireless communication system (e.g., 5G system), the name of the access network device 21 is gNB; in the wireless local Access system, the Access network device 21 is named Access point (Access Ponit). This name may change as communication technology evolves. Furthermore, the access network device 21 may be other means of providing wireless communication functionality for the terminal device, as other possibilities. For convenience of description, in the embodiments of the present application, an apparatus for providing a wireless communication function for a terminal device is referred to as an access network device.

Illustratively, in the embodiment of the present application, the access network device 21 shown in fig. 2 may be a base station, and the respective constituent components of the base station are specifically described below in conjunction with fig. 4.

As shown in fig. 4, the base station includes: the baseband processing Unit (BBU), the remote radio Unit (Radio Remote Unit, RRU) and the antenna can be connected by optical fibers, the RRU is connected to the antenna by a coaxial cable and a power divider (coupler), and generally one BBU can be connected with a plurality of RRUs.

RRU may include 4 modules: the device comprises a digital intermediate frequency module, a transceiver module, a power amplifier module and a filtering module. The digital intermediate frequency module is used for modulation and demodulation, digital up-down conversion, digital-to-analog conversion and the like of optical transmission; the transceiver module is used for completing the conversion from the intermediate frequency signal to the radio frequency signal; and then the radio frequency signals are transmitted out through the antenna after being amplified by the power amplification module and filtered by the filtering module.

The BBU is used for completing the baseband processing functions (coding, multiplexing, modulation, spreading, etc.) of Uu interfaces (i.e., interfaces between terminal devices and base stations), the interface functions of logical interfaces between radio network controllers (Radio Network Controller, RNC) and base stations, signaling processing, local and remote operation maintenance functions, and the functions of monitoring the operating state of a base station system and reporting alarm information, etc.

The random access method provided by the present application will be described in detail below.

Fig. 5 is a schematic flow chart of a random access method according to an embodiment of the present application, where the random access method may be applied to the communication system shown in fig. 2. As shown in fig. 5, in the random access method provided in the embodiment of the present application, S500 and S501 are performed by the access network device 21 shown in fig. 2, and may specifically be performed by a processor in the access network device 21. In addition, S502 and S503 are executed by the terminal device shown in fig. 2, and may be executed by a processor in the terminal device in particular. In practical applications, the processor in the access network device and the processor in the terminal device may both exist in the form of chips. The terminal device in the embodiment of the application is configured with at least two uplink carriers in one cell. For convenience of description, reference to terminal devices in the following are used to denote terminal devices configured with at least two uplink carriers in one cell.

For convenience of description, the embodiments of the present application will take terminal equipment and access network equipment as examples.

Referring to fig. 5, the random access method includes the following steps.

S500, the access network equipment sends first information to the terminal equipment, wherein the first information is used for determining at least one uplink carrier with random access resources in at least two uplink carriers.

Optionally, the access network device sends the first information through radio resource control (Radio Resource Control, RRC) signaling, and may also send the first information through other higher layer signaling, which is not specifically limited in the embodiments of the present application.

In a first implementation manner, the first information in the embodiment of the present application may include time domain information of a random access resource and frequency domain information of the random access resource.

In this scenario, the terminal device may determine, based on the at least two uplink carriers configured by the terminal device, an uplink carrier having a random access resource from among the at least two uplink carriers according to time domain information of the random access resource and frequency domain information of the random access resource.

In a second implementation manner, the first information in the embodiment of the present application may include time domain information of a random access resource, frequency domain information of the random access resource, and identification of some uplink carriers in at least two uplink carriers.

In this scenario, the terminal device may directly determine, according to the identifier of some uplink carriers in the at least two uplink carriers included in the first information, an uplink carrier having a random access resource in the at least two uplink carriers.

In addition to the above description, the first information in the embodiments of the present application may also be other at least one uplink carrier that can be used to determine that there is a random access resource in at least two uplink carriers, which is not specifically limited in the embodiments of the present application.

S501, the access network equipment sends second information to the terminal equipment, wherein the second information is used for indicating an uplink carrier for initiating random access.

Specifically, the access network device determines an uplink carrier that can be used for initiating random access according to the load of each uplink carrier in the at least one uplink carrier with random access resources, and sends second information to the terminal device, where the second information is used to indicate the uplink carrier initiating random access.

Optionally, the second information may be a number of an uplink carrier initiating random access in at least two uplink carriers, or may be other identifiers that can be used to indicate the uplink carrier initiating random access, which is not specifically limited in the embodiment of the present application.

In this embodiment, the access network device may send the second information to the terminal device through RRC configuration signaling, may send the second information to the terminal device through RRC reconfiguration signaling, and may send the second information to the terminal device through other RRC signaling.

S502, the terminal equipment determines an uplink carrier for initiating random access according to the second information.

Alternatively, in case the scheduling request of the terminal device fails, or in case the terminal device has no resources available for the scheduling request, the terminal device triggers the initiation of the random access procedure.

It should be noted that, in the embodiment of the present application, the terminal device may trigger to initiate the random access procedure in other cases, which is not specifically limited in the embodiment of the present application.

In a scenario that a terminal device needs to initiate random access, the terminal device needs to determine an uplink carrier that initiates random access. The second information is used for indicating the uplink carrier for initiating the random access, so that the terminal equipment can directly determine the uplink carrier for initiating the random access according to the second information after receiving the second information sent by the access network equipment.

S503, the terminal equipment initiates random access on the determined uplink carrier which initiates random access.

In S502, the terminal device determines an uplink carrier from which the random access is initiated, so that the terminal device directly initiates the random access on the determined uplink carrier from which the random access is initiated. Specifically, the terminal device sends a random access request including a preamble sequence (preamble) to the access network device on the determined uplink carrier initiating random access. Correspondingly, the access network device sends a corresponding random access response to the terminal device.

Currently, one carrier is configured with four subbands, which are also referred to as BWP (Bandwidth Part) in some documents. Only one of the four subbands in one carrier may be activated at the same time. A subband is composed of a series of consecutive Resource Blocks (RBs) or physical Resource blocks (Physical Resource Block, PRBs). NR specifies: the terminal device uses the resources in the currently activated sub-band in the carrier to transmit data.

However, the currently activated sub-band in the carrier does not necessarily have resources. In order to ensure that the terminal device can successfully complete the random access, in the carrier with the random access resource in the communication system, the BWP configured with the resource in advance is collectively called preset BWP. For example: the preset BWP is initial BWP (Initial BWP), default BWP (default BWP) or cell custom BWP (cell defining BWP). Thus, the terminal equipment can complete random access through presetting random access resources in BWP on an uplink carrier for initiating random access.

It should be noted that BWP is only one expression of the name of the subband. This name of BWP may vary as communication technology evolves, and embodiments of the present application are not limited in detail.

Specifically, after determining an uplink carrier for initiating random access, the terminal equipment determines a currently activated sub-band in the uplink carrier for initiating random access; the terminal equipment judges whether a currently activated sub-band in the uplink carrier initiating the random access is a preset sub-band in the uplink carrier initiating the random access; if the current activated sub-band in the uplink carrier for initiating random access is not the preset sub-band in the uplink carrier for initiating random access, the terminal equipment switches the current activated sub-band in the uplink carrier for initiating random access to the preset sub-band in the uplink carrier for initiating random access, and initiates random access on the uplink carrier for initiating random access through the random access resource in the preset sub-band of the uplink carrier for initiating random access; if the currently activated sub-band in the uplink carrier initiating the random access is the preset sub-band in the uplink carrier initiating the random access, the terminal equipment initiates the random access on the uplink carrier initiating the random access through the random access resource in the currently activated sub-band in the uplink carrier initiating the random access.

The terminal equipment in the embodiment determines the uplink carrier for initiating random access according to the indication of the access network equipment, and initiates random access on the uplink carrier for initiating random access, so that flexible scheduling of random access resources is realized, and the condition of unbalanced load of a communication system is avoided.

In the random access method provided by the application, the terminal equipment can determine the uplink carrier for initiating random access according to the indication of the access network equipment, and also can autonomously determine the uplink carrier for initiating random access according to the requirement. The embodiment shown in fig. 5 describes a procedure in which the terminal device determines an uplink carrier from which to initiate random access according to an indication of the access network device. The process of initiating the uplink carrier of random access is autonomously determined for the terminal equipment according to the requirements.

As shown in fig. 6, in the random access method provided in the embodiment of the present application, S600 is performed by the access network device 21 shown in fig. 2, and may specifically be performed by a processor in the access network device 21. In addition, S601, S602, and S603 are executed by the terminal device shown in fig. 2, and specifically may be executed by a processor in the terminal device.

Referring to fig. 6, the random access method provided in the embodiment of the present application includes the following steps.

S600, the access network equipment sends first information to the terminal equipment, wherein the first information is used for determining at least one uplink carrier with random access resources in at least two uplink carriers.

S600 may refer to S500 described above, and will not be described in detail herein.

S601, the terminal equipment determines at least one uplink carrier with random access resources according to first information.

S602, the terminal equipment determines an uplink carrier initiating random access from at least one uplink carrier with random access resources.

In the scenario that the terminal equipment needs to initiate random access, the terminal equipment autonomously determines an uplink carrier initiating random access from at least one uplink carrier with random access resources.

In the embodiment of the application, the at least two uplink carriers include a first uplink carrier and N second uplink carriers, and N is greater than or equal to 1. Here, the first uplink carrier may be the above PUL, and the second uplink carrier may be the above SUL. In this case, the method for the terminal device to autonomously determine the uplink carrier from which random access is initiated in the at least one uplink carrier with random access resources may be any one of the following:

A. The terminal equipment selects one of M second uplink carriers, and determines the selected second uplink carrier as an uplink carrier initiating random access.

The at least one uplink carrier with random access resource includes M second uplink carriers in the N second uplink carriers.

B. And under the condition that the at least one uplink carrier with the random access resource comprises a first uplink carrier, the terminal equipment determines the first uplink carrier as the uplink carrier initiating random access.

C. And the terminal equipment determines the uplink carrier which is configured with the physical uplink control channel resource in the at least one uplink carrier with the random access resource as the uplink carrier for initiating random access.

D. And the terminal equipment determines the uplink carrier with the shortest time from the current transmission time of the random access resource configured in the at least one uplink carrier with the random access resource in the time domain as the uplink carrier initiating the random access.

The terminal device in the embodiments of the present application may determine the time difference based on the transmission time interval (Transmission Time Interval, TTI).

E. When the scheduling request fails (Scheduling Request Failure, SR Failure) to trigger a random access procedure, the terminal device determines an uplink carrier where a resource used for transmitting the scheduling request is located in the at least one uplink carrier with random access resources as an uplink carrier initiating random access.

S603, the terminal equipment initiates random access on the determined uplink carrier which initiates random access.

S603 refers to the description of S503 above, and detailed description thereof will not be repeated here.

The terminal device in this embodiment autonomously determines, according to its own needs, an uplink carrier from which random access is initiated, and initiates a random access request on the determined uplink carrier from which the random access request is initiated.

In addition to the random access method shown in fig. 6, the access network device in the embodiment of the present application may send a signal quality threshold to the terminal device, so that the terminal device may determine, by determining a size relationship between signal quality of the downlink reference signal and the signal quality threshold, an uplink carrier initiating random access from at least one uplink carrier having random access resources.

As shown in fig. 7, in the random access method provided in the embodiment of the present application, S700, S701, and S702 are executed by the access network device 21 shown in fig. 2, and may be executed by a processor in the access network device 21. In addition, S703, S704 and S705 are performed by the terminal device shown in fig. 2, and may be specifically performed by a processor in the terminal device.

Specifically, as shown in fig. 7, the random access method provided in the embodiment of the present application includes the following steps.

And S700, the access network equipment sends a signal quality threshold to the terminal equipment.

The access network equipment configures the signal quality threshold and sends the configured signal quality threshold to the terminal equipment through RRC configuration signaling or RRC reconfiguration signaling.

Optionally, the access network device may send the signal quality threshold to the terminal device at regular time or periodically, or may determine the signal quality threshold in real time according to the load of at least two uplink carriers, and when the signal quality threshold changes, send the signal quality threshold after the change to the terminal device.

The signal quality in the embodiment of the present application may be measured by RSRP, or may be measured by signal strength, or other parameters capable of representing signal strength, which is not specifically limited in the embodiment of the present application.

S701, the access network equipment sends a downlink reference signal to the terminal equipment.

S702, the access network device sends first information to the terminal device, wherein the first information is used for determining at least one uplink carrier with random access resources in at least two uplink carriers.

S702 may refer to S500 described above, and will not be described in detail herein.

The access network device may perform S700, S701, and S702 simultaneously, or may perform S700 first, then S701, and finally S702, which is not limited in this embodiment of the present application.

S703, the terminal equipment acquires the signal quality of the downlink reference signal.

Specifically, after the terminal device acquires the downlink reference signal, the terminal device measures the signal quality of the downlink reference signal.

Optionally, after receiving the downlink reference signal, the terminal device may periodically measure the signal quality of the downlink reference signal, may also measure the signal quality of the downlink reference signal at regular time, and may also measure the signal quality of the downlink reference signal when there is a need to initiate random access.

S704, the terminal equipment judges whether the signal quality of the downlink reference signal is greater than or equal to a signal quality threshold.

The terminal device in this embodiment determines, according to the result of determining the signal quality of the downlink reference signal and the signal quality threshold, an uplink carrier from which random access is initiated from at least one uplink carrier having random access resources. Specifically, if the signal quality of the downlink reference signal is less than the signal quality threshold, the terminal device executes S705; if the signal quality of the downlink reference signal is greater than or equal to the signal quality threshold, the terminal device performs S706a, or performs S706b, or performs S706c, or performs S706d.

S705, the terminal equipment selects one of M second uplink carriers, and determines the selected second uplink carrier as the uplink carrier initiating random access.

The at least one uplink carrier with random access resources includes M second uplink carriers of the N second uplink carriers.

S705 is the same as the above-mentioned uplink carrier method a in which the terminal device determines to initiate random access.

S706a, when the at least one uplink carrier with random access resource includes a first uplink carrier, the terminal device determines that the first uplink carrier is an uplink carrier initiating random access.

S706a is the same as the above-mentioned uplink carrier method B in which the terminal device determines to initiate random access.

S706b, the terminal equipment determines the uplink carrier with the physical uplink control channel resource configured in the at least one uplink carrier with the random access resource as the uplink carrier initiating the random access.

S706b is the same as the above-mentioned uplink carrier method C in which the terminal device determines to initiate random access.

S706c, the terminal equipment determines the uplink carrier with the shortest time from the current transmission time of the random access resource configured in the at least one uplink carrier with the random access resource in the time domain as the uplink carrier initiating the random access.

S706c is the same as the above-mentioned uplink carrier method D in which the terminal device determines to initiate random access.

S706d, under the condition that the scheduling request fails to trigger the random access process, the terminal equipment determines the uplink carrier where the resource used for sending the scheduling request is located in the at least one uplink carrier with the random access resource as the uplink carrier initiating the random access.

S706d is the same as the above-mentioned uplink carrier method E in which the terminal device determines to initiate random access.

S707, the terminal equipment initiates random access on the determined uplink carrier initiating random access.

S707 refers to S503, which is not described in detail herein.

As can be seen from the embodiment shown in fig. 6 and the embodiment shown in fig. 7, the terminal device in the embodiment of the present application may adopt different manners to flexibly select an uplink carrier initiating random access, and initiate random access on the determined uplink carrier initiating random access.

The embodiments shown in fig. 5, fig. 6, and fig. 7 are all embodiments in which after the terminal device has a requirement for initiating random access, the terminal device determines an uplink carrier for initiating random access. That is, the embodiments shown in fig. 5, 6 and 7 above trigger the random access procedure for the terminal device itself. The random access method provided by the embodiment of the application can be used for sending related information to the terminal equipment for the access network equipment besides triggering the random access process by the terminal equipment, and is used for triggering the random access process.

As shown in fig. 8, in the random access method provided in the embodiment of the present application, S800 and S801 are performed by the access network device 21 shown in fig. 2, and may specifically be performed by a processor in the access network device 21. In addition, S802 and S803 are performed by the terminal device shown in fig. 2, and may be specifically performed by a processor in the terminal device.

Specifically, as shown in fig. 8, the random access method provided in the embodiment of the present application includes the following steps.

S800, the access network device sends first information to the terminal device, wherein the first information is used for determining at least one uplink carrier with random access resources in at least two uplink carriers.

S800 may refer to S500 described above, and will not be described in detail herein.

S801, the access network equipment sends third information to the terminal equipment, wherein the third information is used for triggering a random access process.

Optionally, the third information may be RRC signaling, or may be a physical downlink control channel command (e.g., PDCCH order), which is not specifically limited in this embodiment of the present application.

In a scenario where the third information is a physical downlink control channel command, the physical downlink control channel command includes at least one of fourth information and fifth information. The fourth information includes search space position information configured by the access network device for the scheduling information of each uplink carrier in the at least one uplink carrier with random access resources, where the search space position information of the scheduling information of the uplink carrier may be start position information of the search space of the scheduling information of the uplink carrier. The fifth information includes RNTIs configured by the access network device for each of the at least one uplink carrier having random access resources.

S802, the terminal equipment determines an uplink carrier initiating random access from at least one uplink carrier with random access resources.

If the third information in S801 is RRC signaling, the terminal device may determine the uplink carrier from which the random access is initiated by using the method for determining the uplink carrier from which the random access is initiated in the embodiment shown in fig. 6, which is described herein with reference to S602.

If the third information in S801 is a physical downlink control channel command, when the physical downlink control channel command includes the fourth information, the terminal device obtains downlink control information (Downlink Control Information, DCI) corresponding to a certain uplink carrier in the random access resource corresponding to the search space starting position indicated by the fourth information. In this way, the terminal device can determine the uplink carrier corresponding to the search space position where the obtained DCI is located as the uplink carrier initiating random access.

If the third information in S801 is the physical downlink control channel command, when the physical downlink control channel command includes the fifth information, the terminal device decodes the DCI in the random access resource according to the fifth information, so that the terminal device can obtain the DCI corresponding to a certain uplink carrier. After successfully decoding a DCI using an RNTI corresponding to a certain uplink carrier, the terminal device may determine the uplink carrier corresponding to the RNTI used for decoding as the uplink carrier from which random access is initiated.

S803, responding to the third information, and initiating random access on the determined uplink carrier initiating random access by the terminal equipment.

And after receiving the third information, the terminal equipment responds to the third information to initiate random access on the determined uplink carrier which initiates random access.

S803 may refer to the description of S503 above. The difference is that S503 is the random access triggered by the terminal device itself, and S803 is the random access triggered by the access network device through signaling indication terminal device.

Optionally, in the embodiment shown in fig. 8, before the terminal device determines the uplink carrier for initiating random access, the access network device may further send second information for indicating the uplink carrier for initiating random access to the terminal device, so that the terminal device may directly determine the uplink carrier for initiating random access according to the second information.

Referring to fig. 8, as shown in fig. 9, the random access method provided in the embodiment of the present application further includes the following steps before S802.

S804 (optional), the access network device sends second information to the terminal device, where the second information is used to indicate an uplink carrier that initiates random access.

S804 may refer to the description of S501, and will not be described in detail herein.

Since the second information is used to indicate the uplink carrier for initiating the random access in S804, in S802 in the embodiment shown in fig. 9, the terminal device directly determines the uplink carrier for initiating the random access according to the second information, that is, the same as S502 described above, and detailed description thereof will not be repeated here.

Since S804 is optional, it is indicated by a broken line in fig. 9.

In summary, the terminal device in the embodiment of the present application may trigger random access according to the indication of the access network device, or may trigger random access according to its own requirement. Meanwhile, the terminal equipment can determine the uplink carrier for initiating random access according to the indication of the access network equipment, and also can autonomously determine the uplink carrier for initiating random access, thereby effectively improving the success rate of random access, saving the system overhead and realizing the load balance in the system.

The above embodiments each describe a procedure in which a terminal device initiates random access. In practical application, after the terminal equipment initiates random access, there is a possibility of random access failure. In the case of random access failure, the terminal device in the embodiment of the present application may reinitiate random access.

Optionally, the terminal device in the embodiment of the present application may be configured with a first counter, where the first counter is used to record the number of times the terminal device reinitiates the random access.

Specifically, after the random access procedure initiated by the terminal device on the uplink carrier initiating the random access fails, the terminal device re-initiates the random access, and the value of the first counter is increased by one until the value of the first counter reaches the maximum threshold value of the first counter.

It should be noted that, in the present application, the uplink carrier used by the terminal device to reinitiate the random access may be the same as or different from the uplink carrier used by the terminal device to reinitiate the random access. The uplink carrier used for reinitiating the random access by the terminal device may be determined according to the method shown in any one of the embodiments of fig. 5 to 9, which is not specifically limited in this embodiment of the present application.

Optionally, in this embodiment of the present invention, each uplink carrier in the at least one uplink carrier having a random access resource is configured with a second counter, where the second counter is used to record the number of times that the terminal device reinitiates random access on the corresponding uplink carrier.

Specifically, in the first implementation manner, after the random access procedure initiated by the terminal device on the uplink carrier initiating the random access fails, the terminal device initiates the random access on the uplink carrier initiating the random access again, and the value of the second counter corresponding to the uplink carrier initiating the random access is increased by one, until the value of the second counter corresponding to the uplink carrier initiating the random access reaches the maximum threshold value of the second counter.

In a second implementation manner, in the scenario where the uplink carrier initiating random access is designated by the access network device, after the random access procedure initiated by the terminal device on the uplink carrier initiating random access fails, the terminal device initiates random access on the uplink carrier initiating random access again, and at this time, the value of the second counter corresponding to the uplink carrier initiating random access is increased by one until the value of the second counter corresponding to the uplink carrier initiating random access reaches the maximum threshold of the second counter.

In a third implementation manner, after the terminal device fails the random access procedure initiated on the uplink carrier for initiating the random access, the terminal device re-initiates the random access, and at this time, the value of the second counter corresponding to the uplink carrier for re-initiating the random access by the terminal device is incremented by one. Each second counter is provided with a maximum threshold value, and when the value of the second counter of each uplink carrier in at least one uplink carrier of the random access resource reaches the respective maximum threshold value, the number of times of initiating random access by the terminal equipment reaches the maximum value. Here, the maximum threshold value of each second counter may be the same or different, which is not particularly limited in the embodiment of the present application.

Optionally, the terminal device in the embodiment of the present application is configured with a first counter, and each uplink carrier in the at least one uplink carrier with the random access resource is configured with a second counter, where the first counter is used to record the number of times that the terminal device reinitiates the random access, and the second counter is used to record the number of times that the terminal device reinitiates the random access on the corresponding uplink carrier.

Specifically, in the first implementation manner, after the random access procedure initiated by the terminal device on the uplink carrier initiating the random access fails, the terminal device initiates the random access on the uplink carrier initiating the random access again, where the value of the first counter is increased by one, and the value of the second counter corresponding to the uplink carrier initiating the random access is increased by one. The first counter is provided with a first maximum threshold value, the second counter corresponding to the uplink carrier initiating the random access is provided with a second maximum threshold value, and when the value of the first counter reaches the first maximum threshold value and/or the value of the second counter corresponding to the uplink carrier initiating the random access reaches the second maximum threshold value, the number of times of initiating the random access by the terminal equipment reaches the maximum value.

In a second implementation manner, in the scenario where the uplink carrier initiating random access is designated by the access network device, when the terminal device fails in the random access procedure initiated on the uplink carrier initiating random access, the terminal device initiates random access again on the uplink carrier initiating random access, where the value of the first counter is incremented by one, and the value of the second counter corresponding to the uplink carrier initiating random access is incremented by one. The first counter is provided with a first maximum threshold value, the second counter corresponding to the uplink carrier initiating the random access is provided with a second maximum threshold value, and when the value of the first counter reaches the first maximum threshold value and/or the value of the second counter corresponding to the uplink carrier initiating the random access reaches the second maximum threshold value, the number of times of initiating the random access by the terminal equipment reaches the maximum value.

It should be noted that the foregoing description is merely illustrative of reinitiating the random access by the terminal device in the embodiments of the present application, and is not a limitation of reinitiating the random access by the terminal device in the embodiments of the present application. Of course, in the process of reinitiating the random access by the terminal device in the embodiment of the present application, the terminal device may also determine whether the random access needs to be reinitiated according to other manners.

In the process of reinitiating random access, the terminal equipment in the embodiment of the application can change the sending power of the terminal equipment.

Optionally, the terminal device in the embodiment of the present application may be configured to use a third counter and a first preset power ramp step, where the third counter is configured to record a number of times of change of the transmission power when the terminal device reinitiates random access, and the value of the transmission power of the terminal device is changed based on the first preset power ramp step.

Specifically, in the first implementation manner, when the terminal device reinitiates the random access, the value of the third counter is increased by one, and the transmitting power of the terminal device changes according to the step length of climbing the first preset power. The third counter is provided with a maximum threshold value, and when the value of the third counter reaches the maximum threshold value, the transmission power of the terminal equipment is not changed any more. Assuming that the value of the third counter is the maximum threshold, the transmission power of the terminal device is the first transmission power. After the value of the third counter reaches the maximum threshold, if the terminal equipment also re-initiates the random access, the terminal equipment initiates the random access according to the first sending power.

In a second implementation manner, when the terminal equipment reinitiates the random access, and the uplink carrier used for reinitiating the random access is the same as the uplink carrier used for initiating the random access last time, the value of the third counter is increased by one, and the transmitting power of the terminal equipment changes according to the step length of climbing the first preset power. The third counter is provided with a maximum threshold value, and when the value of the third counter reaches the maximum threshold value, the transmission power of the terminal equipment is not changed any more. Assuming that the value of the third counter is the maximum threshold, the transmission power of the terminal device is the first transmission power. After the value of the third counter reaches the maximum threshold, if the terminal equipment also re-initiates the random access, the terminal equipment initiates the random access according to the first sending power.

Optionally, in this embodiment of the present invention, each uplink carrier in the at least one uplink carrier having a random access resource is configured with a fourth counter and a second preset power ramp step, where the fourth counter is used to record a number of times of change of transmission power when the terminal device reinitiates random access on a corresponding uplink carrier, and a value of the transmission power of the terminal device changes based on the second preset power ramp step corresponding to the uplink carrier that reinitiates random access.

The second preset power ramp step size configured for each uplink carrier in the at least one uplink carrier with the random access resource may be the same or different, which is not specifically limited in the embodiment of the present application.

Specifically, when the terminal equipment re-initiates the random access, and the uplink carrier used for re-initiating the random access is the same as the uplink carrier used for initiating the random access last time, the value of the fourth counter is increased by one, and the transmitting power of the terminal equipment changes according to the second preset power climbing step length corresponding to the uplink carrier. The fourth counter is provided with a maximum threshold value, and when the value of the fourth counter reaches the maximum threshold value, the transmission power of the terminal equipment is not changed any more. Assuming that the value of the fourth counter is the maximum threshold, the transmission power of the terminal device is the second transmission power. After the value of the fourth counter reaches the maximum threshold, if the terminal equipment further initiates random access on the uplink carrier, the terminal equipment initiates random access according to the second sending power.

In summary, after receiving the first information sent by the access network device and used for determining that at least one uplink carrier with random access resources exists in the at least two uplink carriers, the terminal device in the embodiment of the present application determines an uplink carrier initiating random access in the at least one uplink carrier with random access resources, so that the terminal device can initiate random access on the uplink carrier initiating random access.

The embodiment of the application provides a random access device 100, where the random access device 100 may be a chip applied to a terminal device in a connected state and configured with at least two uplink carriers, or the terminal device. The random access means 100 is for performing the steps performed by the terminal device in the above random access method. The random access device 100 provided in the embodiment of the present application may include modules corresponding to the respective steps.

The embodiment of the present application may divide the functional modules of the random access apparatus 100 according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated modules may be implemented in hardware or in software functional modules. The division of the modules in the embodiment of the present application is schematic, which is merely a logic function division, and other division manners may be implemented in practice.

Fig. 10 shows a schematic diagram of a possible configuration of the random access device 100 in the case where respective functional blocks are divided with corresponding respective functions. As shown in fig. 10, the random access apparatus 100 includes a communication unit 10 and a determination unit 11. The communication unit 10 is configured to support the random access device 100 to perform S500, S501, and S503 in the embodiment shown in fig. 5, S600 and S603 in the embodiment shown in fig. 6, S700, S701, S702, and S707 in the embodiment shown in fig. 7, S800, S801, and S803 in the embodiment shown in fig. 8, S804 in the embodiment shown in fig. 9, and/or other procedures for the techniques described herein; the determining unit 71 is configured to support the random access device 100 to perform S502 in the embodiment shown in fig. 5, S601 and S602 in the embodiment shown in fig. 6, S705, S706a, S706b, S706c and S706d in the embodiment shown in fig. 7, S802 in the embodiment shown in fig. 8, and/or other procedures for the techniques described herein. All relevant contents of each step related to the above method embodiment may be cited to the functional description of the corresponding functional module, which is not described herein.

Further, as shown in fig. 11 in combination with fig. 10, the random access apparatus 100 further includes an acquisition unit 12, a switching unit 13, a first configuration unit 14, and a second configuration unit 15. The acquisition unit 12 is configured to support the random access device 100 to perform S703 in the embodiment shown in fig. 7, and/or other procedures for the techniques described herein; a switching unit 13 for supporting switching of the random access device 100 from a currently activated sub-band to a preset sub-band, and/or other procedures for the techniques described herein; the first configuration unit 14 is configured to support the random access device 100 to configure the first counter/second counter, and/or other processes for the techniques described herein; the second configuration unit 15 is used to support the random access device 100 to configure the third counter/fourth counter, and/or other processes for the techniques described herein. Of course, the random access device 100 provided in the embodiments of the present application includes, but is not limited to, the above modules, for example, the random access device 100 may further include a memory unit. The storage unit may be used for storing the program code of the random access device 100.

In case of an integrated unit, fig. 12 shows a schematic diagram of one possible structure of the random access device 100 involved in the above-described embodiment.

As shown in fig. 12, the random access apparatus 100 includes: a processing module 1001 and a communication module 1002. The processing module 1001 is configured to control and manage the operation of the random access device 100, for example, the processing module 1001 is configured to support the random access device 100 to perform S502, S601, S602, S705, S706a, S706b, S706c, S706d, and S802 in the above method embodiment. The communication module 1002 is configured to support the random access apparatus 100 to communicate with an access network device, for example, the communication module 1002 is configured to support the random access apparatus 100 to perform S500, S501, S503, S600, S603, S700, S701, S702, S707, S800, S801, S803, and S804 in the above-described method embodiment. The random access device 100 may further comprise a memory module 1003, which may be used for storing program codes and data of the random access device 100.

When the random access network device 100 is the terminal device shown in fig. 2 and 3, the processing module 1001 may be the processor 31 in fig. 3, the communication module 1002 may be the antenna in fig. 3, and the storage module 1003 may be the memory 34 in fig. 3.

The embodiment of the application also provides a terminal device 110, where the terminal device 110 is in a connected state and is configured with at least two uplink carriers. The terminal device 110 comprises the above-described random access means 100.

When the terminal device 110 is operating, the terminal device 110 performs the random access method of the embodiment as shown in any of the embodiments of fig. 5-9. The random access method may be referred to the above description of any embodiment as shown in fig. 5 to 9, and will not be repeated here.

Another embodiment of the present application further provides a computer readable storage medium having instructions stored therein, which when executed on a terminal device 110, the terminal device 110 performs the steps of the terminal device in the random access method according to the embodiment shown in any one of fig. 5 to 9.

In another embodiment of the present application, there is also provided a computer program product comprising computer-executable instructions stored in a computer-readable storage medium; the at least one processor of the terminal device 110 may read the computer-executable instructions from the computer-readable storage medium, the at least one processor executing the computer-executable instructions causing the terminal device 110 to perform the steps of performing the terminal device in the random access method shown in any of the embodiments of fig. 5-9.

The embodiment of the application provides a random access device 200, and the random access device 200 may be an access network device or a chip in the access network device. The random access means 200 is for performing the steps performed by the access network device in the above random access method. The random access device 200 provided in the embodiment of the present application may include modules corresponding to the respective steps.

The embodiment of the present application may divide the functional modules of the random access apparatus 200 according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated modules may be implemented in hardware or in software functional modules. The division of the modules in the embodiment of the present application is schematic, which is merely a logic function division, and other division manners may be implemented in practice.

Fig. 13 shows a schematic diagram of a possible configuration of the random access apparatus 200 in the present embodiment in the case where respective functional blocks are divided with corresponding respective functions. As shown in fig. 13, the random access apparatus 200 includes a processing unit 210, a transmitting unit 211, and a receiving unit 212. The processing unit 210 is configured to support the random access device 200 to determine the first information, and/or other procedures for the techniques described herein; the transmitting unit 211 is configured to support the random access apparatus 200 to perform S500 and S501 in the embodiment shown in fig. 5, S600 in the embodiment shown in fig. 6, S700, S701, and S702 in the embodiment shown in fig. 7, S800 and S801 in the embodiment shown in fig. 8, S804 in the embodiment shown in fig. 9, and/or other procedures for the techniques described herein; the receiving unit 212 is configured to support the random access apparatus 200 to receive random access requests sent by terminal devices, and/or other procedures for the techniques described herein. All relevant contents of each step related to the above method embodiment may be cited to the functional description of the corresponding functional module, which is not described herein. Of course, the random access device 200 provided in the embodiment of the present application includes, but is not limited to, the above modules, for example, the random access device 200 may further include a storage unit 213. The storage unit 213 may be used to store program codes and data of the random access device 200.

In case of an integrated unit, fig. 14 shows a schematic diagram of one possible structure of the random access device 200 involved in the above-described embodiment.

As shown in fig. 14, the random access apparatus 200 includes: a processing module 220 and a communication module 221. The processing module 220 is configured to control and manage the actions of the random access device 200, for example, the processing module 220 is configured to support the random access device 200 to perform S103 in the method embodiment described above, and/or other processes for the techniques described herein. The communication module 221 is configured to support the random access apparatus 200 to communicate with a terminal device, for example, the communication module 221 is configured to support the random access apparatus 200 to perform S100 and S102 in the above-described method embodiment. The random access device 200 may further comprise a memory module 222, which may be used for storing program codes and data of the random access device 200.

The processing module 220 may be a processor or a controller, such as a central processing unit (Central Processing Unit, CPU), a digital signal processor (Digital Signal Processor, DSP). Which may implement or perform the various exemplary logic blocks, modules and circuits described in connection with the disclosure of embodiments of the invention. The communication module 221 may be a communication interface, a transceiver circuit, a communication interface, or the like. The storage module 222 may be a memory.

The embodiment of the application also provides an access network device 300, where the access network device 300 includes the random access apparatus 200. As shown in fig. 15, the access network apparatus 300 includes: a communication interface 230, a processor 231 and a memory 232. The communication interface 230, the processor 231 and the memory 232 are connected through a system bus 233, and perform communication with each other.

When the access network device 300 is operating, the access network device 300 performs the random access method of the embodiment as shown in any of figures 5-9. The specific random access method may be referred to the related description in the embodiments shown in any of fig. 5 to 9, and will not be described herein.

Wherein the communication interface 230 is used for communication with other devices or communication networks, such as ethernet, WLAN, etc.

The memory 232 is used to store software programs and application modules, and the processor 231 executes the software programs and application modules stored in the memory 232 to perform various functional applications and data processing of the access network device 300.

Memory 232 may include primarily a storage area 2320, wherein storage area 2320 may store an operating system, application programs required for at least one function, such as sending instruction information, and the like.

The Memory 232 may be, but is not limited to, a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a random access Memory (Random Access Memory, RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a terminal device.

The memory 232 may be self-contained and coupled to the processor 231 via the system bus 233. Memory 232 may also be integrated with processor 231.

Processor 231 is the control center of access network device 300. The processor 231 connects the various parts of the overall access network device 300 using various interfaces and lines, performs various functions of the access network device 300 and processes the data by running or executing software programs and/or application modules stored in the memory 232, and invoking data stored in the memory 232, thereby performing overall monitoring of the access network device 300.

In a specific implementation, as one embodiment, processor 231 may include one or more CPUs, for example, processor 231 in fig. 15 includes CPU 0 and CPU 1.

The system bus 233 may be divided into an address bus, a data bus, a control bus, and the like. For clarity of illustration in the embodiments of the invention, the various buses are illustrated in FIG. 15 as system bus 233.

Another embodiment of the present application also provides a computer readable storage medium comprising one or more program code, the one or more programs comprising instructions, which when executed by a processor in an access network device 300, the access network device 300 performs a random access method as shown in any of figures 5-9.

In another embodiment of the present application, there is also provided a computer program product comprising computer-executable instructions stored in a computer-readable storage medium; the at least one processor of the access network device 300 may read the computer-executable instructions from the computer-readable storage medium, the at least one processor executing the computer-executable instructions causing the access network device 300 to perform the steps of the access network device in performing the random access method shown in any of figures 5-9.

The first information in the embodiment of the present application is used to determine at least one uplink carrier with a random access resource in at least two uplink carriers configured by the terminal device, so that the terminal device can determine at least one uplink carrier with a random access resource according to the first information, and further determine an uplink carrier capable of initiating random access from the at least one uplink carrier with a random access resource, so as to implement that the terminal device completes random access.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using a software program, may be present in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, for example, by wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.) means from one website, computer, server, or data center. Computer readable storage media can be any available media that can be accessed by a computer or data terminal device such as a server, data center, or the like that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), etc.

From the foregoing description of the embodiments, it will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of functional modules is illustrated, and in practical application, the above-described functional allocation may be implemented by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to implement all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another apparatus, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and the parts displayed as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a readable storage medium. Based on such understanding, the technical solution of the embodiments of the present application may be essentially or a part contributing to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, including several instructions for causing a device (may be a single-chip microcomputer, a chip or the like) or a processor (processor) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A random access method applied to a chip in a terminal device in a connected state and configured with at least two uplink carriers or the terminal device, the random access method comprising:

receiving first information sent by access network equipment, wherein the first information is used for determining at least one uplink carrier with random access resources in the at least two uplink carriers, and the at least two uplink carriers comprise an auxiliary uplink SUL carrier and a main uplink PUL carrier;

determining an uplink carrier for initiating random access in at least one uplink carrier with random access resources;

initiating random access on the uplink carrier wave initiating random access;

the determining the uplink carrier for initiating random access in at least one uplink carrier of all random access resources specifically includes:

Receiving second information sent by the access network equipment, wherein the second information is used for indicating the uplink carrier for initiating random access;

and determining the uplink carrier for initiating random access according to the second information.

2. The random access method according to claim 1, wherein the at least two uplink carriers include a first uplink carrier and N second uplink carriers, N being equal to or greater than 1;

the at least one uplink carrier with random access resource comprises M second uplink carriers in the N second uplink carriers, the uplink carrier initiating random access is one of the M second uplink carriers, N is more than or equal to M is more than or equal to 1,

or,

the at least one uplink carrier with random access resource includes the first uplink carrier, the uplink carrier initiating random access is the first uplink carrier,

or,

the uplink carrier initiating random access is an uplink carrier configured with physical uplink control channel resources in the at least one uplink carrier having random access resources,

or,

the uplink carrier initiating random access is the uplink carrier with the shortest time from the current transmission time in the time domain of the random access resource configured in the at least one uplink carrier with the random access resource,

Or,

the uplink carrier wave for initiating random access is: and under the condition that the scheduling request fails to trigger a random access process, sending an uplink carrier where a resource used by the scheduling request is located in at least one uplink carrier with random access resources.

3. The random access method according to claim 1, wherein the at least two uplink carriers include a first uplink carrier and N second uplink carriers, N being equal to or greater than 1, the random access method further comprising: acquiring the signal quality of a downlink reference signal sent by the access network equipment;

and if the signal quality of the downlink reference signal is smaller than a signal quality threshold, the at least one uplink carrier with random access resources comprises M second uplink carriers in the N second uplink carriers, the uplink carrier initiating random access is one of the M second uplink carriers, N is greater than or equal to M and is greater than or equal to 1, and the signal quality threshold is received from the access network equipment.

4. The random access method according to claim 1, wherein the at least two uplink carriers include a first uplink carrier and N second uplink carriers, N being equal to or greater than 1, the random access method further comprising: acquiring the signal quality of a downlink reference signal sent by the access network equipment;

Wherein if the signal quality of the downlink reference signal is greater than or equal to the signal quality threshold;

or,

5. The random access method according to any one of claims 1-4, wherein before determining an uplink carrier from which random access is initiated in the at least one uplink carrier with random access resources, the random access method further comprises:

And receiving third information sent by the access network equipment, wherein the third information is used for triggering a random access process.

6. The random access method according to claim 5, wherein the third information is a physical downlink control channel command, the physical downlink control channel command includes at least one of fourth information and fifth information, the fourth information includes search space location information configured by the access network device for scheduling information of each of the at least one uplink carrier with random access resources, and the fifth information includes a radio network temporary identifier RNTI configured by the access network device for each of the at least one uplink carrier with random access resources.

7. The random access method according to any one of claims 1-4, wherein after determining an uplink carrier from among the at least one uplink carrier with random access resources to initiate random access, the random access method further comprises:

determining a sub-band which is currently activated in the uplink carrier wave initiating random access;

if the current activated sub-band is not the preset sub-band, switching the current activated sub-band to the preset sub-band;

The random access is initiated on the uplink carrier wave initiating the random access, which concretely comprises the following steps:

and initiating random access through random access resources in the preset sub-band on the uplink carrier initiating random access.

8. The random access method according to any one of claims 1-4, characterized in that the random access method further comprises:

configuring a first counter, wherein the first counter is used for recording the number of times of reinitiating random access;

or,

and respectively configuring a second counter for each uplink carrier in the at least one uplink carrier with the random access resource, wherein the second counter is used for recording the times of reinitiating random access on the corresponding uplink carrier.

9. The random access method according to any one of claims 1-4, characterized in that the random access method further comprises:

a third counter and a first preset power climbing step length are configured, wherein the third counter is used for recording the change times of the transmission power when the random access is restarted, and the value of the transmission power is changed based on the first preset power climbing step length;

or,

and respectively configuring a fourth counter and a second preset power climbing step length for each uplink carrier wave in at least one uplink carrier wave with random access resources, wherein the fourth counter is used for recording the change times of the transmission power when the random access is restarted on the corresponding uplink carrier wave, and the value of the transmission power is changed based on the second preset power climbing step length corresponding to the uplink carrier wave used for restarting the random access.

10. A random access method, applied to an access network device or a chip in the access network device, comprising:

transmitting first information to terminal equipment, wherein the terminal equipment is in a connection state and is configured with at least two uplink carriers, and the first information is used for determining at least one uplink carrier with random access resources in the at least two uplink carriers;

transmitting second information to the terminal equipment, wherein the second information is used for indicating an uplink carrier for initiating random access;

and receiving a random access request sent by the terminal equipment on an uplink carrier initiating random access in at least one uplink carrier of all random access resources.

11. The random access method according to claim 10, characterized in that the random access method further comprises:

and sending third information to the terminal equipment, wherein the third information is used for triggering a random access process.

12. The random access method of claim 11, wherein the third information is a physical downlink control channel command, the physical downlink control channel command includes at least one of fourth information and fifth information, the fourth information includes search space location information configured by the access network device for scheduling information of each of the at least one uplink carrier with random access resources, and the fifth information includes a radio network temporary identity RNTI configured by the access network device for each of the at least one uplink carrier with random access resources.

13. A random access apparatus, characterized in that the random access apparatus is a chip applied in a terminal device in a connected state and configured with at least two uplink carriers or the terminal device, the random access apparatus comprising:

a communication unit, configured to receive first information sent by an access network device, where the first information is used to determine at least one uplink carrier with random access resources in the at least two uplink carriers, where the at least two uplink carriers include an auxiliary uplink SUL carrier and a primary uplink PUL carrier;

a determining unit, configured to determine, according to the first information received by the communication unit, at least one uplink carrier with random access resources, and determine an uplink carrier initiating random access from among the at least one uplink carrier with random access resources;

the communication unit is further configured to initiate random access on the uplink carrier that initiates random access and is determined by the determining unit;

the communication unit is further configured to receive second information sent by the access network device, where the second information is used to indicate the uplink carrier that initiates random access;

The determining unit is specifically configured to determine, according to the second information received by the receiving unit, the uplink carrier from which random access is initiated.

14. The random access device according to claim 13, wherein the at least two uplink carriers comprise a first uplink carrier and N second uplink carriers, N being equal to or greater than 1;

or,

Or,

15. The random access device according to claim 13, wherein the at least two uplink carriers include a first uplink carrier and N second uplink carriers, N being equal to or greater than 1, the random access device further comprising an acquisition unit;

the acquisition unit is used for acquiring the signal quality of the downlink reference signal sent by the access network equipment;

16. The random access device according to claim 13, wherein the at least two uplink carriers include a first uplink carrier and N second uplink carriers, N being equal to or greater than 1, the random access device further comprising an acquisition unit;

if the signal quality of the downlink reference signal is greater than or equal to the signal quality threshold;

or,

the uplink carrier initiating the random access is an uplink carrier where a resource used by the scheduling request is sent in at least one uplink carrier with a random access resource under the condition that the scheduling request fails to trigger a random access process.

17. Random access device according to any of the claims 13-16, characterized in that,

The communication unit is further configured to receive third information sent by the access network device, where the third information is used to trigger a random access procedure before the determining unit determines, in at least one uplink carrier of the random access resources, an uplink carrier that initiates random access.

18. The random access device of claim 17, wherein the third information is a physical downlink control channel command, the physical downlink control channel command including at least one of fourth information including search space location information configured by the access network device for scheduling information of each of the at least one uplink carrier with random access resources, and fifth information including a radio network temporary identity RNTI configured by the access network device for each of the at least one uplink carrier with random access resources.

19. Random access device according to any of the claims 13-16, characterized in that,

the determining unit is further configured to determine a subband currently activated in the uplink carrier initiating random access after determining the uplink carrier initiating random access in at least one uplink carrier of the random access resources;

The random access device further comprises a switching unit;

the switching unit is configured to switch the currently activated subband to a preset subband if the currently activated subband determined by the determining unit is not the preset subband;

the communication unit is specifically configured to initiate random access through a random access resource in the preset subband switched by the switching unit on the uplink carrier initiating random access.

20. The random access device according to any of the claims 13-16, further comprising a first configuration unit for:

or,

21. The random access device according to any of the claims 13-16, characterized in that the random access device further comprises a second configuration unit for:

or,

22. A random access device, wherein the random access device is an access network device or a chip in the access network device, the random access device comprising:

the processing unit is used for determining first information, the first information is used for indicating the terminal equipment to determine at least one uplink carrier with random access resources in at least two uplink carriers, and the terminal equipment is in a connection state and is configured with the at least two uplink carriers;

A sending unit, configured to send the first information determined by the processing unit to the terminal device;

the sending unit is further configured to send second information to the terminal device, where the second information is used to indicate an uplink carrier that initiates random access;

and the receiving unit is used for receiving the random access request sent by the terminal equipment on the uplink carrier which initiates random access in at least one uplink carrier of all the random access resources.

23. The random access device of claim 22, wherein the random access device comprises a base station,

the sending unit is further configured to send third information to the terminal device, where the third information is used to trigger a random access procedure.

24. The random access device of claim 23, wherein the third information is a physical downlink control channel command, the physical downlink control channel command including at least one of fourth information including search space location information configured by the access network device for scheduling information of each of the at least one uplink carrier with random access resources, and fifth information including a radio network temporary identity RNTI configured by the access network device for each of the at least one uplink carrier with random access resources.