CN115150968A

CN115150968A - Random access method, equipment, device and storage medium

Info

Publication number: CN115150968A
Application number: CN202110343477.XA
Authority: CN
Inventors: 费永强; 邢艳萍
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2022-10-04
Also published as: WO2022206124A1

Abstract

The embodiment of the application provides a random access method, equipment, a device and a storage medium, which are applied to terminal equipment, wherein the method comprises the following steps: determining a target random access channel opportunity (RO) for initiating random access; and determining a target initial upstream bandwidth part BWP according to the target RO. By the random access method, the device, the apparatus and the storage medium provided by the embodiment of the application, the terminal device determines the target initial uplink BWP corresponding to the terminal device according to the selected target RO, so that the target RO selected by the terminal device can always be in the frequency domain range of the initial uplink BWP, thereby avoiding that the red beacon UE cannot initiate random access on the RO with the best channel condition, ensuring the reliability of random access and improving the success rate of random access.

Description

Random access method, equipment, device and storage medium

Technical Field

The present application relates to the field of wireless communications technologies, and in particular, to a random access method, device, apparatus, and storage medium.

Background

In a 5G NR (New Radio) system, as technology evolves, a terminal with Reduced Capability, i.e., a Reduced Capability UE (User Equipment or terminal), needs to be supported. Compared with a normal UE, a red cap UE aims to reduce the implementation complexity and cost of a terminal, so the maximum bandwidth supported by the red cap UE may be smaller than that supported by the normal UE, for example, below a carrier frequency of 6GHz, the maximum bandwidth supported by the normal UE may be 100MHz, and the maximum bandwidth supported by the red cap UE may be only 20MHz.

Whatever UE is, random access needs to be initiated to a network device (e.g., a gNB (next Generation Node B)) to obtain communication services provided by the network device. Specifically, taking four-step Random Access as an example, the UE measures an SSB (Synchronization Signal Block) sent by the gNB, selects an RO (Random Access Channel) occasion corresponding to an SSB with a better Signal strength (RSRP (Reference Signal Received Power, received Power) measured by the SSB is greater than a predefined threshold), and sends the PRACH (Physical Random Access Channel) on the RO as a first step of Random Access. The frequency domain range of all ROs is included in the frequency domain range of the initial UL BWP (initial Uplink Bandwidth Part). However, since the redmap UE bandwidth is small, its maximum bandwidth may be smaller than the initial UL BWP bandwidth. At this time, there are problems as follows:

(1) If the recap UE still uses the RO used by the normal UE, the RO selected by the recap UE may be out of its own frequency band, which may result in that the optimal RO cannot be selected to transmit the PRACH.

(2) If the maximum bandwidth of a RedCap UE is less than the initial UL BWP bandwidth, it may not work properly in the initial UL BWP.

Disclosure of Invention

To solve the problems in the prior art, embodiments of the present application provide a random access method, device, apparatus, and storage medium.

In a first aspect, an embodiment of the present application provides a random access method, which is applied to a terminal device, and the method includes:

determining a target random access channel opportunity (RO) for initiating random access;

and determining a target initial upstream bandwidth part BWP according to the target RO.

Optionally, the method further comprises:

receiving configuration information of at least one initial upstream BWP candidate and configuration information of at least one RO sent by a network device;

said determining a target initial upstream bandwidth portion BWP according to said target RO comprises:

determining the target initial upstream BWP in the at least one initial upstream BWP candidate in accordance with the determined target RO.

Optionally, there is no overlap between sets of ROs corresponding to each of the initial upstream BWP candidates;

said determining said target initial upgoing BWP in said at least one initial upgoing BWP candidate in accordance with said determined target RO, comprising:

and determining the target initial upstream BWP according to the initial upstream BWP candidate corresponding to the determined target RO.

Optionally, sets of ROs corresponding to each of the initial upstream BWP candidates do not overlap with each other, and ROs corresponding to the same synchronization signal block SSB correspond to the same initial upstream BWP candidate;

Optionally, there is an overlap between sets of ROs corresponding to each of the initial upstream BWP candidates;

said determining, in accordance with the determined target RO, the target initial upgoing BWP in the at least one initial upgoing BWP candidate, including any of:

determining at least one initial upstream BWP candidate corresponding to the target RO, and determining the target initial upstream BWP according to the priority corresponding to each initial upstream BWP candidate;

determining at least one initial upstream BWP candidate corresponding to the target RO, and determining the target initial upstream BWP according to the starting frequency and/or the central frequency respectively corresponding to each initial upstream BWP candidate;

and determining the target initial upstream BWP according to first indication information corresponding to the target RO, wherein the first indication information is used for indicating an initial upstream BWP candidate uniquely corresponding to each RO.

Optionally, the RO corresponding to the initial upstream BWP candidate is an RO whose frequency domain range is included in the frequency domain range of the initial upstream BWP candidate.

Optionally, the determining a target initial upstream bandwidth portion BWP according to the target RO includes any one of:

determining a starting frequency or a center frequency corresponding to the target RO, and determining a target initial upstream BWP according to the starting frequency or the center frequency; wherein, a center frequency of a frequency domain range corresponding to the target initial upstream BWP is the same as a start frequency or a center frequency corresponding to the target RO, and a frequency domain width of the frequency domain range corresponding to the target initial upstream BWP is indicated by the network device or is predefined;

determining a starting frequency corresponding to the target RO, and determining a target initial upstream BWP according to the starting frequency; wherein, the starting frequency of the frequency domain range corresponding to the target initial uplink BWP is the same as the starting frequency corresponding to the target RO, and the frequency domain width of the frequency domain range corresponding to the target initial uplink BWP is indicated by the network device or predefined.

determining a starting frequency or a central frequency corresponding to a designated RO corresponding to the target RO, and determining a target initial upstream BWP according to the starting frequency or the central frequency; wherein, the center frequency of the frequency domain range corresponding to the target initial uplink BWP is the same as the start frequency or center frequency corresponding to the specified RO, and the frequency domain width of the frequency domain range corresponding to the target initial uplink BWP is indicated by the network device or predefined;

determining a starting frequency corresponding to a designated RO corresponding to the target RO, and determining a target initial upstream BWP according to the starting frequency; wherein a starting frequency of a frequency domain range corresponding to the target initial upstream BWP is the same as a starting frequency corresponding to the specified RO, and a frequency domain width of the frequency domain range corresponding to the target initial upstream BWP is indicated by the network device or predefined.

In a second aspect, an embodiment of the present application further provides a random access method, which is applied to a network device, and the method includes:

determining a target random access channel opportunity (RO) used for initiating random access by a terminal device;

and determining a target initial upstream bandwidth part BWP corresponding to the terminal equipment according to the target RO.

Optionally, the method further comprises:

transmitting configuration information of at least one initial upstream BWP candidate and configuration information of at least one RO to the terminal device;

the determining, according to the target RO, a target initial upstream bandwidth portion BWP corresponding to the terminal device includes:

and determining a target initial upstream BWP corresponding to the terminal device in the at least one initial upstream BWP candidate according to the determined target RO.

the determining, according to the determined target RO, a target initial upstream BWP corresponding to the terminal device in the at least one initial upstream BWP candidate includes:

and determining a target initial upstream BWP corresponding to the terminal device according to the determined initial upstream BWP candidate corresponding to the target RO.

and determining a target initial upstream BWP corresponding to the terminal device according to the initial upstream BWP candidate corresponding to the determined target RO.

determining, by the terminal device, a target initial upstream BWP corresponding to the terminal device in the at least one initial upstream BWP candidate according to the determined target RO, where the determining includes any one of:

determining at least one initial upstream BWP candidate corresponding to the target RO, and determining a target initial upstream BWP corresponding to the terminal device according to a priority corresponding to each initial upstream BWP candidate;

determining at least one initial upstream BWP candidate corresponding to the target RO, and determining a target initial upstream BWP corresponding to the terminal device according to a start frequency and/or a center frequency respectively corresponding to each initial upstream BWP candidate;

and determining a target initial upstream BWP corresponding to the terminal device according to first indication information corresponding to the target RO, wherein the first indication information is used for indicating an initial upstream BWP candidate uniquely corresponding to each RO.

Optionally, the determining, according to the target RO, a target initial upstream bandwidth portion BWP corresponding to the terminal device includes any one of:

determining a starting frequency or a center frequency corresponding to the target RO, and determining a target initial upstream BWP corresponding to the terminal device according to the starting frequency or the center frequency; wherein, a center frequency of a frequency domain range corresponding to the target initial upstream BWP is the same as a start frequency or a center frequency corresponding to the target RO, and a frequency domain width of the frequency domain range corresponding to the target initial upstream BWP is indicated to the terminal device by the network device or is predefined;

determining a starting frequency corresponding to the target RO, and determining a target initial upstream BWP corresponding to the terminal device according to the starting frequency; wherein a starting frequency of the frequency domain range corresponding to the target initial uplink BWP is the same as a starting frequency corresponding to the target RO, and a frequency domain width of the frequency domain range corresponding to the target initial uplink BWP is indicated to the terminal device by the network device or is predefined.

determining a starting frequency or a central frequency corresponding to a designated RO corresponding to the target RO, and determining a target initial upstream BWP corresponding to the terminal device according to the starting frequency or the central frequency; wherein a center frequency of a frequency domain range corresponding to the target initial upstream BWP is the same as a start frequency or a center frequency corresponding to the specified RO, and a frequency domain width of the frequency domain range corresponding to the target initial upstream BWP is indicated to the terminal device by the network device or is predefined;

determining a starting frequency corresponding to a designated RO corresponding to the target RO, and determining a target initial upstream BWP corresponding to the terminal device according to the starting frequency; wherein a start frequency of a frequency domain range corresponding to the target initial upstream BWP is the same as a start frequency corresponding to the specified RO, and a frequency domain width of the frequency domain range corresponding to the target initial upstream BWP is indicated to the terminal device by the network device or is predefined.

In a third aspect, an embodiment of the present application further provides a terminal device, including a memory, a transceiver, and a processor, where:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and implementing the steps of the random access method as described above in the first aspect.

In a fourth aspect, an embodiment of the present application further provides a network device, including a memory, a transceiver, and a processor, where:

a memory for storing a computer program; a transceiver for transceiving data under the control of the processor; a processor for reading the computer program in the memory and implementing the steps of the random access method according to the second aspect as described above.

In a fifth aspect, an embodiment of the present application further provides a random access apparatus, which is applied to a terminal device, where the apparatus includes:

a first determining unit, configured to determine a target random access channel opportunity RO for initiating random access;

a second determining unit, configured to determine a target initial upstream bandwidth part BWP according to the target RO.

In a sixth aspect, an embodiment of the present application further provides a random access apparatus, which is applied to a network device, and the apparatus includes:

a third determining unit, configured to determine a target random access channel opportunity RO used by the terminal device to initiate random access;

and a fourth determining unit, configured to determine, according to the target RO, a target initial upstream bandwidth portion BWP corresponding to the terminal device.

In a seventh aspect, this application embodiment further provides a processor-readable storage medium, which stores a computer program for causing a processor to execute the steps of the random access method according to the first aspect described above or execute the steps of the random access method according to the second aspect described above.

According to the random access method, the device, the apparatus and the storage medium provided by the embodiment of the application, the terminal device determines the target initial uplink BWP corresponding to the terminal device according to the selected target RO, so that the target RO selected by the terminal device can always be in the frequency domain range of the initial uplink BWP, thereby avoiding that the red beacon UE cannot initiate random access on the RO with the best channel condition, ensuring the reliability of random access and improving the success rate of random access.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following descriptions are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic diagram of the locations of initial UL BWP and RO provided by the prior art in the frequency domain;

fig. 2 is a flowchart of a random access method provided in an embodiment of the present application;

fig. 3 is one implementation schematic diagram of a random access method provided in an embodiment of the present application;

fig. 4 is a second schematic diagram of an implementation of the random access method according to the embodiment of the present application;

fig. 5 is a third schematic diagram of an implementation of a random access method according to an embodiment of the present application;

fig. 6 is a fourth schematic diagram of an implementation of the random access method provided in the embodiment of the present application;

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

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

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

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

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

Detailed Description

In the embodiment of the present application, the term "and/or" describes an association relationship of associated objects, and means that there may be three relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

In the embodiments of the present application, the term "plurality" means two or more, and other terms are similar thereto.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the existing NR, a network device (e.g., a gNB) broadcasts and transmits configuration information of an SSB, initial UL BWP, and configuration information of an RO. The network device may send a plurality of SSBs, where there is a certain mapping relationship between the SSBs and the ROs, and the SSBs and the ROs may have a many-to-one, one-to-one, or one-to-many correspondence relationship, and the mapping relationship indication information is also included in the RO configuration information.

Fig. 1 is a schematic diagram of the locations of initial UL BWPs and ROs provided in the prior art in the frequency domain. As shown in fig. 1, there are 8 frequency-divided ROs in the frequency domain, 8 ROs correspond to 4 SSBs, and ROs corresponding to different SSBs are distinguished by different patterns (SSBs are not shown in the figure). However, since the bandwidth of a rectap UE is smaller than the initial UL BWP, a rectap initial UL BWP may not include all ROs in the frequency domain, which results in that a rectap UE may not select the optimal RO for random access. For example, in fig. 1, assuming that the recmap initial UL BWP is unique similar to, and the same center frequency as, the existing initial UL BWP, it cannot initiate random access in RO _0, RO _1, or RO _6, RO _ 7.

Currently, generally, in a manner of gbb broadcast configuration, a UE determines only one common initial UL BWP with a fixed frequency domain range; if the red beacon initial UL BWP is implemented according to a similar method, it may cause that the RO corresponding to the SSB with the best signal received by the red beacon UE is outside the frequency domain range of the red beacon initial UL BWP, and the red beacon UE cannot initiate random access on the RO with the best channel condition, so as to reduce the strength of transmitting and receiving signals during random access, and also reduce the success rate of random access. A new redmap-specific initial UL BWP may need to be introduced at this time; however, there is no new method for defining an initial UL BWP specific to a RedCap.

In view of the above problems, embodiments of the present application provide a solution, and the core idea is as follows: the RedCap UE determines the corresponding RedCap initial UL BWP according to the selected RO; correspondingly, the network equipment determines the RedCap initial UL BWP of the RedCap UE according to the RO of the random access initiated by the RedCap UE, so that the RO selected by the RedCap UE can always be in the frequency domain range of the RedCap initial UL BWP, the reliability of the random access is ensured, and the success rate of the random access is improved.

Fig. 2 is a schematic flowchart of a random access method provided in an embodiment of the present application, where the method is applied to a terminal device, and as shown in fig. 2, the method includes the following steps:

step 200, determining a target random access channel opportunity (RO) for initiating random access;

specifically, the terminal device needs to initiate random access to the network device (e.g., the gNB) to obtain the communication service provided by the network device. For this purpose, the terminal device first measures the SSB sent by the network device, and selects an RO corresponding to the SSB with better signal strength (RSRP measured by the SSB is greater than a predefined threshold) according to the RO configuration information sent by the network device as a target RO for initiating random access to the network device, so as to send a PRACH to the network device on the target RO as a first step of the random access. The application mainly takes four-step random access as an example, the PRACH may be Msg1 (Message 1 ) in the four-step random access; the application may also be used for two-step random access, in which case the PRACH may be a PRACH in an MsgA (Message a) in two-step random access.

Step 201, according to the target RO, determining the target initial upstream bandwidth portion BWP.

Specifically, after determining a target RO for initiating random access to the network device, the terminal device may determine an initial upstream BWP corresponding to the terminal device, that is, a target initial upstream BWP, according to the target RO. Accordingly, if the network device detects the PRACH in the target RO, the network device may determine the target initial uplink BWP corresponding to the terminal device according to the target RO to which the terminal device initiates random access.

Optionally, after determining the target RO and the target initial Uplink BWP, the terminal device may perform Uplink transmission in the random access phase in the determined target initial Uplink BWP, where the Uplink transmission in the random access phase includes PRACH, msg3 (Message 3 ), PUCCH (Physical Uplink Control Channel) feedback for Msg4 (Message 4 ), or PUSCH (Physical Uplink Shared Channel) in MsgA (unique in 2-step RACH), PUCCH feedback for MsgB (Message B ), and so on. This approach may simplify the sending of the terminal device during the random access phase, without the terminal device having to switch between BWPs during the initial access phase.

In the embodiments of the present application, a random access that needs to be initiated by a red beacon UE to a network device is taken as an example for explanation, and it can be known to those skilled in the art that the technical solutions in the embodiments of the present application are not limited to a scenario where the red beacon UE initiates the random access, and other types of terminal devices may also be applicable, for example, a narrowband terminal, an internet of things terminal, and the like. For convenience of subsequent discussion, the embodiments of the present application are introduced only by taking the red map UE as an example.

According to the random access method provided by the embodiment of the application, the terminal device determines the target initial uplink BWP corresponding to the terminal device according to the selected target RO, so that the target RO selected by the terminal device can always be in the frequency domain range of the initial uplink BWP, the phenomenon that the RedCap UE cannot initiate random access on the RO with the best channel condition is avoided, the reliability of the random access is ensured, and the success rate of the random access is improved.

Optionally, the method further comprises:

the determining a target initial upstream bandwidth part BWP according to the target RO includes:

determining a target initial upgoing BWP among the at least one initial upgoing BWP candidate according to the determined target RO.

Specifically, the terminal device may further receive configuration information of at least one initial upstream BWP candidate and configuration information of at least one RO sent by the network device before determining the target initial upstream BWP, so as to determine one of the at least one initial upstream BWP candidate as the target initial upstream BWP according to the determined target RO.

The network device may send the configuration information in various ways, such as broadcast transmission, unicast or multicast notification, and so on. The configuration information of the initial upstream BWP candidates at least includes the frequency domain position of each initial upstream BWP candidate.

Optionally, in the configuration information of at least one initial uplink BWP candidate sent by the network device, only the frequency domain position may be different between the initial uplink BWP candidates, and the remaining configurations are the same (e.g., frequency domain width, PUSCH configuration, PUCCH configuration, etc.), for example, configuration information other than the frequency domain position is shared between the initial uplink BWP candidates. This approach may reduce the overhead of sending configuration information for the initial upstream BWP candidate.

In the random access method provided in the embodiment of the present application, the terminal device may receive configuration information of at least one initial uplink BWP candidate and configuration information of at least one RO sent by the network device, so as to determine, according to the determined target RO, one of the at least one initial uplink BWP candidate as the target initial uplink BWP, thereby avoiding that the reccap UE cannot initiate random access on the RO with the best channel condition, ensuring reliability of random access, and improving success rate of random access.

Optionally, sets of ROs corresponding to each initial upstream BWP candidate are not overlapped;

determining a target initial upgoing BWP among the at least one initial upgoing BWP candidate according to the determined target RO, comprising:

Specifically, before determining the target initial upstream BWP, the terminal device may further receive configuration information of at least one initial upstream BWP candidate and configuration information of at least one RO sent by the network device, where sets of ROs corresponding to the initial upstream BWP candidates do not overlap with each other.

It should be noted that, in the embodiments of the present application, the RO corresponding to each initial upstream BWP candidate refers to an RO whose frequency domain range is included in the frequency domain range of the initial upstream BWP candidate, and accordingly, the initial upstream BWP candidate corresponding to the RO refers to an initial upstream BWP candidate whose frequency domain includes the RO. The inclusion may be complete, that is, the frequency domain range of the initial upstream BWP candidate includes the complete RO frequency domain range, or only partial, that is, only part of the frequency domain range of the RO is included in the frequency domain range of the initial upstream BWP candidate.

The sets of ROs corresponding to each initial upstream BWP candidate do not overlap with each other, i.e. indicate a "many-to-one" correspondence between each RO and each initial upstream BWP candidate, and after determining the target RO, the terminal device may determine the target initial upstream BWP according to which initial upstream BWP candidate the target RO is included in the frequency domain, e.g. if the target RO is included in the initial upstream BWP candidate 1 in the frequency domain, then determine the initial upstream BWP candidate 1 as the target initial upstream BWP.

In the random access method provided by the embodiment of the present application, sets of ROs corresponding to initial upstream BWP candidates received by the terminal device are not overlapped, so that the terminal device can uniquely determine a target initial upstream BWP according to the determined target RO, thereby improving the efficiency of random access of the terminal device.

Fig. 3 is a schematic diagram of an implementation of the random access method according to the embodiment of the present application, as shown in fig. 3, a network device sends 4 SSBs (SSB _0, SSB _1, SSB _2, and SSB _ 3), and 8 frequency-divided ROs (RO _0, RO _1, … … RO _ 7) are configured in a frequency domain, where 8 ROs correspond to 4 SSBs, SSB _0 corresponds to RO _0 and RO _1, SSB _1corresponds to RO _2 and RO _3, SSB _2corresponds to RO _4 and RO _5, SSB u 3 corresponds to RO _6 and RO _7, ROs corresponding to different SSBs are distinguished by different patterns in the diagram, and SSBs are not shown in the diagram. In addition, the network device broadcasts and transmits 3 pieces of RedCap initial UL BWP candidate configuration information, which are RedCap initial UL BWP0, redCap initial UL BWP 1 and RedCap initial UL BWP 2. The initial upstream BWP candidate configuration information includes frequency domain range indication information of each initial upstream BWP candidate, and indicates a frequency domain range of each initial upstream BWP candidate. Preferably, the frequency domain width of each initial upstream BWP candidate does not exceed the maximum bandwidth supported by the recmap UE, which can ensure that the recmap UE can correctly transmit regardless of which initial upstream BWP candidate is selected as the target initial upstream BWP.

As can be seen from FIG. 3, redCap initial UL BWP0 includes the RO sets { RO _0, RO _1, RO _2} in the frequency domain, redCap initial UL BWP 1 includes the RO sets { RO _3, RO _4, RO _5} and RedCap initial UL BWP 2 includes the RO sets { RO _6, RO _7}. It can be seen that the 3 initial upstream BWP candidates comprise different sets of ROs, with no overlap between the sets. Under this method, RO _0, RO _1, RO _2 correspond to RedCap initial UL BWP0, RO _3, RO _4, RO _5 correspond to RedCap initial UL BWP 1, RO _6, RO _7 correspond to RedCap initial UL BWP 2.

If the RSRP of SSB _0 measured by a certain RedCap UE is larger than a predefined threshold value, the RO _0 or RO _1 corresponding to SSB _0 can be selected to initiate random access, namely PRACH is sent in the selected RO; taking the example of selecting RO _0, the recmap UE may determine that its recmap initial UL BWP is recmap initial UL BWP 0. Similarly, if another reccap UE measures that RSRP of SSB _1 is greater than the predefined threshold, it may select RO _2 or RO _3 corresponding to SSB _1 to initiate random access, in which case, if the reccap UE selects RO _2, it also determines reccap initial UL BWP0 as its reccap initial UL BWP, and if the reccap UE selects RO _3, it determines reccap initial UL BWP 1 as its reccap initial UL BWP.

Accordingly, if the gNB detects PRACH in RO _0, the gNB may determine that a certain redmap UE initiating random access uses redmap initial UL BWP0 as redmap initial UL BWP. Similarly, if the gNB detects the PRACH in a different RO, it may determine a red beacon initial UL BWP corresponding to a red beacon UE initiating random access.

By the method in the embodiment, the RedCap initial UL BWP does not exceed the bandwidth of the RedCap UE, and meanwhile, the RedCap UE can always select the best RO to initiate random access based on the measurement result of the SSB, so that the signal quality of a random access channel is ensured, and the success rate of the random access is improved. The corresponding manner of "many-to-one" between the RO and the red initial UL BWP candidate also enables the gNB to always uniquely determine the red initial UL BWP of the red initial UE initiating random access according to the RO receiving the PRACH, thereby reducing the implementation complexity of the gNB.

The "many-to-one" correspondence relationship is premised on that a plurality of ROs correspond to the same red initial UL BWP candidate in the frequency domain. It may also happen that one RO corresponds to the same red initial UL BWP candidate, in this case, there is a one-to-one correspondence. The analysis in the present embodiment is also applicable in the one-to-one correspondence relationship.

Optionally, sets of ROs corresponding to the initial upstream BWP candidates do not overlap with each other, and ROs corresponding to the same synchronization signal block SSB correspond to the same initial upstream BWP candidate;

Specifically, before determining the target initial upstream BWP, the terminal device may further receive configuration information of at least one initial upstream BWP candidate and configuration information of at least one RO sent by the network device, where sets of ROs corresponding to the initial upstream BWP candidates do not overlap with each other, and if one SSB corresponds to at least one RO, at least one RO corresponding to the same SSB is included in the same initial upstream BWP candidate. This indicates that not only is there a "many-to-one" correspondence between each RO and each initial upstream BWP candidate, but also there is a "many-to-one" correspondence between each SSB and each initial upstream BWP candidate.

The terminal device, after determining the target RO, may determine the target initial upbound BWP according to which initial upbound BWP candidate the target RO is included in the frequency domain, e.g., if the target RO is included in the initial upbound BWP candidate 2 in the frequency domain, then the initial upbound BWP candidate 2 is determined as the target initial upbound BWP.

In the random access method provided in the embodiment of the present application, sets of ROs corresponding to initial uplink BWP candidates received by a terminal device are not overlapped, and ROs corresponding to the same SSB are included in the same initial uplink BWP candidate, so that the terminal device can uniquely determine a target initial uplink BWP according to the determined target RO, thereby improving the efficiency of random access of the terminal device, and simplifying an uplink-downlink beam relationship that needs to be maintained by a network device in the initial uplink BWP.

Fig. 4 is a schematic diagram of an implementation of the random access method according to the embodiment of the present application, as shown in fig. 4, where 2 initial uplink BWP candidates (redmap initial UL BWP0 and redmap initial UL BWP 1) are assumed. Unlike the embodiment shown in fig. 3, there is an additional limitation in this embodiment: if there are multiple ROs for one SSB, then multiple ROs for the same SSB must be included in the same initial upstream BWP candidate.

In fig. 4, each SSB corresponds to two ROs (e.g., SSB _0 corresponds to RO _0 and RO _1, SSB _1corresponds to RO _2 and RO _3, SSB _2corresponds to RO _4 and RO _5, SSB _3corresponds to RO _6 and RO _7, ROs corresponding to different SSBs are distinguished by different patterns in the figure, and SSBs are not shown in the figure), and thus two ROs corresponding to the same SSB are included in the same initial upstream BWP candidate, and there is no case where two ROs corresponding to the same SSB are included in one of the redmap initial UL BWP0 and the other is included in the redmap initial UL BWP 1. In this case, not only is there a "many-to-one" correspondence between RO and the redmap initial UL BWP candidate, but even (implicitly) there is a "many-to-one" correspondence between SSB and the redmap initial UL BWP candidate.

In addition, compared with the embodiment corresponding to fig. 3, the embodiment has an additional beneficial effect: the transmission beams between the gNB and the UE have a correspondence relationship between uplink and downlink beam pairs (beam pairs). In the initial access stage, the downlink beam is characterized by the SSB sent by the gNB, and the uplink beam is characterized by the PRACH, the Msg3 and the like sent by the UE.

In addition, the "many-to-one" correspondence relationship is premised on that, in the frequency domain, a plurality of ROs correspond to the same red initial UL BWP candidate, or a plurality of SSBs correspond to the same red initial UL BWP candidate. It is also possible that one RO corresponds to the same rdmap initial UL BWP candidate, or one SSB corresponds to the same rdmap initial UL BWP, in which case there is a "one-to-one" correspondence. The analysis in the present embodiment is also applicable in the one-to-one correspondence relationship.

Optionally, there is an overlap between sets of ROs corresponding to each initial upstream BWP candidate;

determining a target initial upstream BWP in the at least one initial upstream BWP candidate based on the determined target RO, including any one of:

determining at least one initial uplink BWP candidate corresponding to the target RO, and determining the target initial uplink BWP according to the priority corresponding to each initial uplink BWP candidate;

determining at least one initial upstream BWP candidate corresponding to the target RO, and determining the target initial upstream BWP according to the initial frequency and/or the central frequency respectively corresponding to each initial upstream BWP candidate;

and determining the target initial upstream BWP according to first indication information corresponding to the target RO, wherein the first indication information is used for indicating the initial upstream BWP candidate uniquely corresponding to each RO.

Specifically, before determining the target initial upstream BWP, the terminal device may further receive configuration information of at least one initial upstream BWP candidate and configuration information of at least one RO sent by the network device, where there is overlap between sets of ROs corresponding to the initial upstream BWP candidates. This indicates that there is a possible "many-to-many" correspondence, or a "one-to-many" correspondence, between each RO and each initial upstream BWP candidate.

Since it is possible that one RO is included in both of the two initial upstream BWP candidates in the frequency domain (of course, there is also a possibility that a part of ROs corresponds to only one initial upstream BWP candidate, in which case the target initial upstream BWP can be uniquely determined), the terminal device cannot uniquely determine the target initial upstream BWP only according to which initial upstream BWP candidate the target RO is included in the frequency domain after determining the target RO.

In this case, the terminal device may determine the target initial upstream BWP according to the selection priority respectively corresponding to each initial upstream BWP candidate. For example, if the target RO is included in both the initial upgoing BWP candidate 1 and the initial upgoing BWP candidate 2 in the frequency domain, and the initial upgoing BWP candidate 1 is selected with higher priority than the initial upgoing BWP candidate 2, the initial upgoing BWP candidate 1 is determined as the target initial upgoing BWP.

The selection priority corresponding to each initial uplink BWP candidate may be sent to the terminal device by the network device.

Alternatively, the terminal device may also determine the target initial upstream BWP according to the start frequency and/or the center frequency respectively corresponding to each initial upstream BWP candidate, for example, if the target RO is simultaneously included in the initial upstream BWP candidate 1 and the initial upstream BWP candidate 2 in the frequency domain, then the initial upstream BWP candidate 1 with the lowest start frequency is determined as the target initial upstream BWP. Of course, the initial upstream BWP candidate with the highest start frequency or the lowest center frequency or the highest center frequency may also be determined as the target initial upstream BWP.

It should be noted that the above examples of determining the target initial upstream BWP based on the starting frequency or the center frequency are not exhaustive, and there may be various determination rules, for example, the initial upstream BWP candidate with a smaller index value is defined to have a higher priority. The determination is made based on what kind of rule, and the terminal device may determine its target initial upstream BWP from at least one initial upstream BWP candidate through a predefined method.

Optionally, the terminal device may also determine its target initial upstream BWP according to the first indication information sent by the receiving network device. Wherein the first indication information indicates one initial upstream BWP candidate uniquely corresponding to each RO.

Since each RO is indicated with a unique corresponding one of the initial upgoing BWP candidates, the terminal device, after determining the target RO, may determine the initial upgoing BWP candidate to which the target RO uniquely corresponds as the target initial upgoing BWP, even though the target RO may be included in a plurality of initial upgoing BWP candidates in the frequency domain. For example, although the target RO is included in both the initial upbound BWP candidate 1 and the initial upbound BWP candidate 2 in the frequency domain, the terminal device may determine that the initial upbound BWP candidate 1 is the target initial upbound BWP candidate 1 if the network device indicates that the target RO corresponds to the initial upbound BWP candidate 1.

In the random access method provided by the embodiment of the present application, sets of ROs corresponding to initial uplink BWP candidates received by a terminal device may overlap with each other, so that configuration restrictions on the initial uplink BWP candidates are reduced, and flexibility of configuration is improved.

Fig. 5 is a schematic diagram illustrating an implementation of the random access method according to an embodiment of the present application, and as shown in fig. 5, unlike the embodiment corresponding to fig. 3 or fig. 4, there is no "many-to-one" or "one-to-one" constraint relationship between an RO and an initial uplink BWP candidate in this embodiment. The same RO may correspond to a plurality of initial upstream BWP candidates, and there may be an overlap between sets of ROs included in the initial upstream BWP candidates in the frequency domain.

In this embodiment, if the selected RO corresponds to multiple initial uplink BWP candidates, the redmap UE needs to determine one of the multiple initial uplink BWP candidates as a redmap initial UL BWP in addition to selecting the RO. Available methods are:

(1) The gNB broadcasts a selection priority among the initial upstream BWP candidates.

For example, the gNB may broadcast a priority order between initial uplink BWP candidates, e.g., 0>1>2, which may be used for all ROs, and the UE may determine a redmap initial UL BWP according to the priority order. For example, if the RedCap UE selects RO _2, the RedCap UE determines RedCap initial UL BWP0 as its initial uplink BWP; if the RedCap UE selects RO _4, the RedCap UE determines RedCap initial UL BWP 1 as its initial uplink BWP. Since the priority is common to the RO, the indication overhead is small.

(2) The initial uplink BWP candidate with the lowest/highest frequency for the start/center frequency domain position is selected by a predefined method, such as the redmap UE.

The method does not require the gNB to broadcast additional information, but rather, through predefined rules, allows the UE to determine its initial uplink BWP among multiple initial uplink BWP candidates. For example, it may be provided that the recap UE always selects an initial upgoing BWP candidate with the lowest starting position frequency among a plurality of initial upgoing BWP candidates overlapping the selected RO as its recap initial UL BWP. Under this predefined approach, if the RedCap UE selects RO _3, RO _3 corresponds to RedCap initial UL BWP0 and RedCap initial UL BWP 1, the UE determines RedCap initial UL BWP0 as its initial upstream BWP because the starting frequency position of RedCap initial UL BWP0 is lower than RedCap initial UL BWP 1. Similarly, it is also possible to generalize to selecting based on the center frequency position of the initial upstream BWP candidate, or selecting the initial upstream BWP candidate with the highest frequency of the start/center frequency domain position, and so on.

(3) The gNB broadcasts a RedCap initial UL BWP corresponding to each RO.

Similarly (1), the gdb may broadcast a red map initial UL BWP for each RO (corresponding to multiple initial upstream BWP candidates). For example, gNB may indicate that RO _2 corresponds to RedCap initial UL BWP0, and RO _3 corresponds to RedCap initial UL BWP 1. Since the indication of the initial upstream BWP candidate is required for each RO (corresponding to a plurality of initial upstream BWP candidates), the indication overhead is larger than (1), but the indication is also more flexible.

The method in this embodiment has the least restriction on the configuration of the red map initial UL BWP candidate and the most flexible configuration. But requires additional methods to handle the possible "one RO for multiple initial upstream BWP candidates".

Optionally, the determining the target initial upstream bandwidth portion BWP according to the target RO includes any one of:

determining a starting frequency or a center frequency corresponding to the target RO, and determining a target initial uplink BWP according to the starting frequency or the center frequency; the center frequency of the frequency domain range corresponding to the target initial uplink BWP is the same as the start frequency or the center frequency corresponding to the target RO, and the frequency domain width of the frequency domain range corresponding to the target initial uplink BWP is indicated by the network device or predefined;

determining an initial frequency corresponding to the target RO, and determining a target initial upstream BWP according to the initial frequency; wherein, the starting frequency of the frequency domain range corresponding to the target initial upstream BWP is the same as the starting frequency corresponding to the target RO, and the frequency domain width of the frequency domain range corresponding to the target initial upstream BWP is indicated by the network device or predefined.

Specifically, after determining a target RO for initiating random access to a network device, a terminal device may determine a frequency domain range of a target initial upstream BWP corresponding to the terminal device according to a frequency domain range of the target RO and a predefined rule.

For example, the center frequency of the frequency domain range corresponding to the target initial upstream BWP may be predefined to be the same as a certain frequency corresponding to the target RO, for example, the center frequency of the frequency domain range corresponding to the target initial upstream BWP may be predefined to be the same as the center frequency corresponding to the target RO, the center frequency of the frequency domain range corresponding to the target initial upstream BWP may be predefined to be the same as the start frequency corresponding to the target RO, or the center frequency of the frequency domain range corresponding to the target initial upstream BWP may be predefined to be the same as another frequency corresponding to the target RO.

For another example, the start frequency of the frequency domain range corresponding to the target initial upstream BWP may be predefined to be the same as the start frequency corresponding to the target RO, the end frequency of the frequency domain range corresponding to the target initial upstream BWP may also be predefined to be the same as the end frequency corresponding to the target RO, and so on.

It should be noted that the same frequency may be completely equal in frequency, or may not be completely equal in frequency, and there is a certain offset, for example, the center frequency of the target RO is the same as the center frequency of the target initial upstream BWP, which may mean "the center frequency of the target RO" + "a predefined/notified offset value" = "the center frequency of the target initial upstream BWP".

In addition, the frequency domain width of the frequency domain range corresponding to the target initial upstream BWP may be indicated by the network device, for example, the network device sends the frequency domain width to the terminal device by broadcast, or may be predefined. It should be noted that the frequency domain width of the frequency domain range corresponding to the target initial upstream BWP may be fixed or may have different frequency domain widths according to the target RO.

According to the random access method provided by the embodiment of the application, the frequency domain range of the target initial upstream BWP can be determined according to the frequency domain range of the target RO, without the network device indicating the frequency domain range of the initial upstream BWP candidate, so that the overhead of the network device for sending the configuration information can be reduced.

determining a starting frequency or a central frequency corresponding to a designated RO corresponding to the target RO, and determining a target initial upstream BWP according to the starting frequency or the central frequency; the center frequency of the frequency domain range corresponding to the target initial uplink BWP is the same as the start frequency or the center frequency corresponding to the designated RO, and the frequency domain width of the frequency domain range corresponding to the target initial uplink BWP is indicated by the network device or predefined;

determining an initial frequency corresponding to a designated RO corresponding to the target RO, and determining a target initial upstream BWP according to the initial frequency; wherein, the starting frequency of the frequency domain range corresponding to the target initial upstream BWP is the same as the starting frequency corresponding to the designated RO, and the frequency domain width of the frequency domain range corresponding to the target initial upstream BWP is indicated by the network device or predefined.

Specifically, the designated RO refers to a predefined or network device-indicated RO for determining the target initial upstream BWP frequency-domain range.

Unlike the above embodiment, in the above embodiment, all ROs may be ROs for determining the frequency domain range of the target initial upstream BWP, and in this embodiment, only some ROs (i.e. a subset of all ROs with different frequency domain locations) are designated ROs, in this case, after the terminal device determines the target RO for initiating random access to the network device, it needs to determine the designated RO in the set of ROs according to the set of ROs in which the target RO is located, for example, the set of ROs in which the target RO is located may be a set of multiple ROs corresponding to the same SSB, and if at least one designated RO exists in the set of ROs, the frequency domain range of the target initial upstream BWP corresponding to the terminal device may be determined according to the frequency domain range of the designated RO and a predefined rule.

With the random access method provided in this embodiment, the frequency domain range of the target initial upstream BWP may be determined according to the frequency domain range of the designated RO corresponding to the target RO, without the network device indicating the frequency domain range of the initial upstream BWP candidate, so that the overhead of the network device sending the configuration information may be reduced.

Fig. 6 is a schematic diagram of an implementation of the random access method according to an embodiment of the present application, and as shown in fig. 6, the network device sends 4 SSBs (SSB _0, SSB _1, SSB _2, and SSB _ 3), and 4 frequency-divided ROs (RO _0, RO _1, RO _2, RO _3) are configured on the frequency domain, where 4 ROs correspond to 4 SSBs, and SSB _0 corresponds to RO _0, SSB _1corresponds to RO _1, SSB 2 corresponds to RO _2, SSB _3corresponds to RO _3, and SSB is not shown in the figure. ROs corresponding to different SSBs are distinguished in the figure by different patterns.

Unlike the embodiments corresponding to fig. 3-5, the network device does not indicate the frequency domain range of the red initial UL BWP, i.e., at least one of the "frequency domain position" or the "frequency domain width" of the initial upstream BWP candidate, is not directly indicated by the network device. The frequency domain range of the initial upstream BWP candidate may be determined according to a specific RO, and in the present embodiment, it is assumed that all ROs having different frequency domain locations are all the specific ROs that are "available for determining the initial upstream BWP candidate".

As shown in fig. 6, in the present embodiment, each RO with different frequency domain positions corresponds to one rdcp initial UL BWP candidate. The frequency domain center position of each RO is the frequency domain center position of the corresponding RedCap initial UL BWP candidate; the Frequency domain width of the initial uplink BWP candidates is predefined, and the Frequency domain width of each initial uplink BWP candidate is the same, for example, the Frequency domain Range 1 (Frequency Range 1, fr1, refers to in the band below 6 GHz) is predefined to be 20MHz, and the Frequency domain Range 2 (Frequency Range 2, refers to in the millimeter wave band) is predefined to be 100MHz.

By the method in this embodiment, if a rdcap UE selects a certain RO, the frequency domain range of the rdcap initial UL BWP corresponding to the rdcap UE may be determined according to the frequency domain information of the RO and a predefined rule. For example, if a rectap UE selects RO _0 for access, it may also determine the frequency domain range of its corresponding rectap initial UL BWP0 according to RO _ 0; similarly, if the PRACH sent by the red beacon UE is detected in RO _0, the gNB may determine the frequency domain range of the initial uplink BWP, i.e., the red beacon initial UL BWP0, of a certain red beacon UE initiating random access.

In another embodiment, the specific RO may also be a subset of all ROs with different frequency domain locations, for example, a subset of ROs determined in a predefined manner (e.g., the least frequent one of the ROs corresponding to the same SSB), or a subset of ROs indicated by the network device broadcast; the frequency domain position of the initial upstream BWP candidate may also have other determination or corresponding methods, for example, the frequency domain starting position of the initial upstream BWP candidate is the same as the starting position of the RO; the frequency domain width of the initial upstream BWP candidate may also be indicated by the network device broadcast, or even separately for each initial upstream BWP candidate, i.e. the frequency domain width of the initial upstream BWP candidates may not be uniform, common, but independent.

Fig. 7 is a flowchart illustrating a random access method provided in an embodiment of the present application, where the method is applied to a network device, and as shown in fig. 7, the method includes the following steps:

step 700, determining a target random access channel opportunity (RO) for initiating random access by a terminal device;

specifically, the terminal device needs to initiate random access to the network device (e.g., the gNB) to obtain the communication service provided by the network device. For this purpose, the terminal device first measures the SSB sent by the network device, selects an RO corresponding to the SSB with better signal strength (RSRP measured by the SSB is greater than a predefined threshold) according to the RO configuration information sent by the network device as a target RO for initiating random access to the network device, and sends a PRACH to the network device on the target RO as a first step of the random access. Accordingly, if the network device detects the PRACH in the target RO, the network device may determine the target RO selected by the terminal device initiating the random access.

Step 701, determining a target initial upstream bandwidth portion BWP corresponding to the terminal device according to the target RO.

Specifically, after determining the target RO selected by the terminal device initiating the random access, the network device may determine an initial upstream BWP corresponding to the terminal device, that is, a target initial upstream BWP, according to the target RO.

According to the random access method provided by the embodiment of the application, the network equipment determines the target RO selected by the terminal equipment according to the RO detected by the PRACH, and determines the target initial uplink BWP corresponding to the terminal equipment according to the target RO, so that the target RO selected by the terminal equipment can always be in the frequency domain range of the target initial uplink BWP, the phenomenon that a RedCap UE cannot initiate random access on the RO with the best channel condition is avoided, the reliability of the random access is ensured, and the success rate of the random access is improved.

Optionally, the method further comprises:

sending configuration information of at least one initial upstream BWP candidate and configuration information of at least one RO to a terminal device;

according to the target RO, determining a target initial upstream bandwidth portion BWP corresponding to the terminal device, including:

Specifically, the network device may further send configuration information of at least one initial upstream BWP candidate and configuration information of at least one RO to the terminal device before determining the target initial upstream BWP, so that the terminal device determines one of the at least one initial upstream BWP candidate as the target initial upstream BWP according to the determined target RO. Accordingly, the network device determines one of the at least one initial upstream BWP candidates as the target initial upstream BWP, also based on the determined target RO.

In the random access method provided in the embodiment of the present application, the network device may send configuration information of at least one initial uplink BWP candidate and configuration information of at least one RO to the terminal device, and determine, according to the determined target RO, one of the at least one initial uplink BWP candidate as a target initial uplink BWP corresponding to the terminal device, so as to avoid that the reccap UE cannot initiate random access on the RO with the best channel condition, ensure reliability of random access, and improve success rate of random access.

determining a target initial upstream BWP corresponding to the terminal device in the at least one initial upstream BWP candidate according to the determined target RO, including:

and determining the target initial upstream BWP corresponding to the terminal device according to the determined initial upstream BWP candidate corresponding to the target RO.

Specifically, before determining the target initial upstream BWP, the network device may further send, to the terminal device, configuration information of at least one initial upstream BWP candidate and configuration information of at least one RO, where sets of ROs corresponding to the initial upstream BWP candidates do not overlap with each other.

The set of ROs corresponding to each initial upstream BWP candidate does not overlap with each other, i.e. indicates a "many-to-one" correspondence between each RO and each initial upstream BWP candidate, and after determining the target RO, the network device may determine the target initial upstream BWP according to which initial upstream BWP candidate the target RO is included in the frequency domain, e.g. if the target RO is included in the initial upstream BWP candidate 1 in the frequency domain, then determine the initial upstream BWP candidate 1 as the target initial upstream BWP.

In the random access method provided by the embodiment of the present application, sets of ROs corresponding to initial upstream BWP candidates sent by a network device to a terminal device are not overlapped, so that both the terminal device and the network device can uniquely determine a target initial upstream BWP according to the determined target RO, thereby improving the efficiency of random access.

and determining the target initial upstream BWP corresponding to the terminal device according to the initial upstream BWP candidate corresponding to the determined target RO.

Specifically, before determining the target initial upstream BWP, the network device may further send configuration information of at least one initial upstream BWP candidate and configuration information of at least one RO to the terminal device, where sets of ROs corresponding to the initial upstream BWP candidates do not overlap with each other, and if one SSB corresponds to at least one RO, at least one RO corresponding to the same SSB is included in the same initial upstream BWP candidate. This indicates that not only is there a "many-to-one" correspondence between each RO and each initial upstream BWP candidate, but also there is a "many-to-one" correspondence between each SSB and each initial upstream BWP candidate.

The network device, after determining the target RO, may determine the target initial upbound BWP according to which initial upbound BWP candidate the target RO is included in the frequency domain, e.g., determining the initial upbound BWP candidate 2 as the target initial upbound BWP if the target RO is included in the frequency domain in the initial upbound BWP candidate 2.

In the random access method provided in the embodiment of the present application, sets of ROs corresponding to initial uplink BWP candidates sent by a network device to a terminal device are not overlapped, and ROs corresponding to the same SSB are included in the same initial uplink BWP candidate, so that both the terminal device and the network device can uniquely determine a target initial uplink BWP according to the determined target RO, thereby improving the efficiency of random access, and simplifying an uplink-downlink beam relationship that needs to be maintained by the network device in the initial uplink BWP.

determining a target initial upstream BWP corresponding to the terminal device in the at least one initial upstream BWP candidate according to the determined target RO, where the determining includes any one of:

determining at least one initial upstream BWP candidate corresponding to the target RO, and determining a target initial upstream BWP corresponding to the terminal device according to the priority corresponding to each initial upstream BWP candidate;

Specifically, before determining the target initial upstream BWP, the network device may further send configuration information of at least one initial upstream BWP candidate and configuration information of at least one RO to the terminal device, where there is an overlap between sets of ROs corresponding to the initial upstream BWP candidates. This indicates that there is a possible "many-to-many" correspondence, or a "one-to-many" correspondence, between each RO and each initial upstream BWP candidate.

Since it is possible for one RO to be included in both of the two initial upstream BWP candidates in the frequency domain (of course, it is also possible for there to be a portion of ROs corresponding to only one initial upstream BWP candidate, in which case the target initial upstream BWP can be uniquely determined), the terminal device cannot uniquely determine the target initial upstream BWP after determining the target RO, based only on which initial upstream BWP candidate the target RO is included in the frequency domain.

In this case, the network device may determine the target initial upstream BWP according to the selection priority corresponding to each initial upstream BWP candidate. For example, if the target RO is included in both the initial upgoing BWP candidate 1 and the initial upgoing BWP candidate 2 in the frequency domain, and the initial upgoing BWP candidate 1 is selected with higher priority than the initial upgoing BWP candidate 2, the initial upgoing BWP candidate 1 is determined as the target initial upgoing BWP.

Alternatively, the network device may also determine the target initial upstream BWP according to the start frequency and/or the center frequency respectively corresponding to each initial upstream BWP candidate, for example, if the target RO is simultaneously included in the initial upstream BWP candidate 1 and the initial upstream BWP candidate 2 in the frequency domain, the initial upstream BWP candidate 1 with the lowest start frequency is determined as the target initial upstream BWP. Of course, the initial upgoing BWP candidate with the highest start frequency or the lowest center frequency or the highest center frequency may also be determined as the target initial upgoing BWP.

It should be noted that the above examples of determining the target initial upstream BWP based on the starting frequency or the center frequency are not exhaustive, and there may be various determination rules, for example, that an initial upstream BWP candidate with a smaller index value is defined to have a higher priority. Specifically, based on what kind of rule, the network device may determine, by a predefined method, a target initial upstream BWP corresponding to the terminal device from the at least one initial upstream BWP candidate.

Optionally, the terminal device may also determine its target initial upstream BWP according to the first indication information sent by the receiving network device. Wherein the first indication information indicates one initial upstream BWP candidate uniquely corresponding to each RO. Accordingly, the network device may also determine a target initial upstream BWP corresponding to the terminal device according to one initial upstream BWP candidate uniquely corresponding to each RO in the first indication information.

Since each RO is indicated with a unique corresponding one of the initial upbound BWP candidates, the network device, after determining the target RO, may determine the initial upbound BWP candidate to which the target RO uniquely corresponds as the target initial upbound BWP, even though the target RO may be included in multiple initial upbound BWP candidates in the frequency domain. For example, although the target RO is included in both the initial upstream BWP candidate 1 and the initial upstream BWP candidate 2 in the frequency domain, the network device indicates that the target RO corresponds to the initial upstream BWP candidate 1, and it may be determined that the initial upstream BWP candidate 1 is the target initial upstream BWP.

In the random access method provided in the embodiment of the present application, sets of ROs corresponding to initial uplink BWP candidates sent by a network device to a terminal device may overlap with each other, so that configuration restrictions on the initial uplink BWP candidates are reduced, and flexibility of configuration is improved.

Optionally, the determining, according to the target RO, the target initial upstream bandwidth portion BWP corresponding to the terminal device includes any one of:

determining a starting frequency or a center frequency corresponding to the target RO, and determining a target initial upstream BWP corresponding to the terminal device according to the starting frequency or the center frequency; the center frequency of the frequency domain range corresponding to the target initial uplink BWP is the same as the starting frequency or the center frequency corresponding to the target RO, and the frequency domain width of the frequency domain range corresponding to the target initial uplink BWP is indicated to the terminal device by the network device or predefined;

determining a starting frequency corresponding to the target RO, and determining a target initial uplink BWP corresponding to the terminal device according to the starting frequency; the starting frequency of the frequency domain range corresponding to the target initial upstream BWP is the same as the starting frequency corresponding to the target RO, and the frequency domain width of the frequency domain range corresponding to the target initial upstream BWP is indicated to the terminal device by the network device or is predefined.

Specifically, after the network device determines a target RO used by the terminal device to initiate random access, the network device may determine a frequency domain range of a target initial upstream BWP corresponding to the terminal device according to the frequency domain range of the target RO and a predefined rule.

In addition, the frequency domain width of the frequency domain range corresponding to the target initial uplink BWP may be the frequency domain width of the frequency domain range corresponding to the initial uplink BWP in the configuration information indicated to the terminal device by the network device, or may be predefined. It should be noted that the frequency domain width of the frequency domain range corresponding to the target initial upstream BWP may be fixed or may have different frequency domain widths according to the target RO.

determining a starting frequency or a central frequency corresponding to a designated RO corresponding to the target RO, and determining a target initial uplink BWP corresponding to the terminal device according to the starting frequency or the central frequency; the center frequency of the frequency domain range corresponding to the target initial uplink BWP is the same as the start frequency or the center frequency corresponding to the designated RO, and the frequency domain width of the frequency domain range corresponding to the target initial uplink BWP is indicated to the terminal device by the network device or is predefined;

determining a starting frequency corresponding to a designated RO corresponding to the target RO, and determining a target initial upstream BWP corresponding to the terminal device according to the starting frequency; the starting frequency of the frequency domain range corresponding to the target initial upstream BWP is the same as the starting frequency corresponding to the designated RO, and the frequency domain width of the frequency domain range corresponding to the target initial upstream BWP is indicated to the terminal device by the network device or is predefined.

Specifically, the designated RO refers to an RO predefined or indicated by the network device to the terminal device for determining the target initial upstream BWP frequency domain range.

Unlike the foregoing embodiment, in the foregoing embodiment, all ROs may be ROs for determining a frequency domain range of a target initial upstream BWP, and in this embodiment, only some ROs (i.e. a subset of all ROs with different frequency domain locations) are designated ROs, in this case, after a network device determines a target RO for a terminal device to initiate random access, it needs to first determine the designated RO in the set of ROs according to the set of ROs in which the target RO is located, for example, the set of ROs in which the target RO is located may be a set of multiple ROs corresponding to the same SSB, and at least one designated RO exists in the set of ROs, and then the frequency domain range of the target initial upstream BWP corresponding to the terminal device may be determined according to the frequency domain range of the designated RO and a predefined rule.

With the random access method provided in this embodiment of the present application, the frequency domain range of the target initial upstream BWP may be determined according to the frequency domain range of the designated RO corresponding to the target RO, without the network device indicating the frequency domain range of the initial upstream BWP candidate, so that the overhead of the network device in sending the configuration information may be reduced.

The method and the device provided by the embodiments of the application are based on the same application concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not described again.

Fig. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present application, where as shown in fig. 8, the terminal device includes a memory 820, a transceiver 810 and a processor 800; wherein the processor 800 and the memory 820 may also be physically separated.

A memory 820 for storing a computer program; a transceiver 810 for transceiving data under the control of the processor 800.

In particular, transceiver 810 is used to receive and transmit data under the control of processor 800.

Where in fig. 8, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 800 and memory represented by memory 820. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 810 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium including wireless channels, wired channels, fiber optic cables, and the like. The user interface 830 may also be an interface capable of interfacing externally to a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 800 is responsible for managing the bus architecture and general processing, and the memory 820 may store data used by the processor 800 in performing operations.

The processor 800 may be a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD), and may also have a multi-core architecture.

The processor 800 is configured to invoke the computer program stored in the memory 820 to execute any of the methods provided by the embodiments of the present application according to the obtained executable instructions, for example: determining a target random access channel opportunity (RO) for initiating random access; based on the target RO, a target initial upstream bandwidth portion BWP is determined.

Optionally, the method further comprises: receiving configuration information of at least one initial upstream BWP candidate and configuration information of at least one RO sent by a network device;

determining a target initial upstream bandwidth portion BWP according to the target RO, comprising: determining a target initial upgoing BWP among the at least one initial upgoing BWP candidate according to the determined target RO.

Optionally, there is no overlap between sets of ROs corresponding to each initial upstream BWP candidate;

determining a target initial upgoing BWP among the at least one initial upgoing BWP candidate according to the determined target RO, comprising: and determining the target initial upstream BWP according to the initial upstream BWP candidate corresponding to the determined target RO.

Optionally, sets of ROs corresponding to each initial upstream BWP candidate are not overlapped, and ROs corresponding to the same synchronization signal block SSB correspond to the same initial upstream BWP candidate;

determining a target initial upgoing BWP in the at least one initial upgoing BWP candidate based on the determined target RO, including any one of: determining at least one initial upstream BWP candidate corresponding to the target RO, and determining a target initial upstream BWP according to the priority corresponding to each initial upstream BWP candidate; determining at least one initial upstream BWP candidate corresponding to the target RO, and determining a target initial upstream BWP according to a start frequency and/or a center frequency respectively corresponding to each initial upstream BWP candidate; and determining the target initial upstream BWP according to the first indication information corresponding to the target RO, wherein the first indication information is used for indicating the initial upstream BWP candidate uniquely corresponding to each RO.

Optionally, the determining, according to the target RO, the target initial upstream bandwidth portion BWP includes any one of: determining a starting frequency or a central frequency corresponding to the target RO, and determining a target initial upstream BWP according to the starting frequency or the central frequency; the center frequency of the frequency domain range corresponding to the target initial uplink BWP is the same as the starting frequency or the center frequency corresponding to the target RO, and the frequency domain width of the frequency domain range corresponding to the target initial uplink BWP is indicated by the network device or predefined; determining an initial frequency corresponding to the target RO, and determining a target initial upstream BWP according to the initial frequency; wherein, the starting frequency of the frequency domain range corresponding to the target initial upstream BWP is the same as the starting frequency corresponding to the target RO, and the frequency domain width of the frequency domain range corresponding to the target initial upstream BWP is indicated by the network device or predefined.

Optionally, the determining, according to the target RO, the target initial upstream bandwidth portion BWP includes any one of: determining a starting frequency or a central frequency corresponding to a designated RO corresponding to the target RO, and determining a target initial upstream BWP according to the starting frequency or the central frequency; the center frequency of the frequency domain range corresponding to the target initial uplink BWP is the same as the start frequency or the center frequency corresponding to the designated RO, and the frequency domain width of the frequency domain range corresponding to the target initial uplink BWP is indicated by the network device or predefined; determining an initial frequency corresponding to a designated RO corresponding to the target RO, and determining a target initial upstream BWP according to the initial frequency; wherein, the starting frequency of the frequency domain range corresponding to the target initial upstream BWP is the same as the starting frequency corresponding to the designated RO, and the frequency domain width of the frequency domain range corresponding to the target initial upstream BWP is indicated by the network device or predefined.

Fig. 9 is a schematic structural diagram of a network device according to an embodiment of the present application, where as shown in fig. 9, the network device includes a memory 920, a transceiver 910, and a processor 900; wherein the processor 900 and the memory 920 may also be physically separated.

A memory 920 for storing a computer program; a transceiver 910 for transceiving data under the control of the processor 900.

In particular, the transceiver 910 is used to receive and transmit data under the control of the processor 900.

Wherein in fig. 9 the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by the processor 900, and various circuits, represented by the memory 920, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 910 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium including wireless channels, wired channels, fiber optic cables, and the like. The processor 900 is responsible for managing the bus architecture and general processing, and the memory 920 may store data used by the processor 900 in performing operations.

The processor 900 may be a CPU, ASIC, FPGA or CPLD, and the processor may also employ a multi-core architecture.

The processor 900 is configured to execute any of the methods provided by the embodiments of the present application by calling the computer program stored in the memory 920 according to the obtained executable instructions, for example: determining a target random access channel opportunity (RO) used for initiating random access by a terminal device; and determining a target initial upstream bandwidth part BWP corresponding to the terminal equipment according to the target RO.

Optionally, the method further comprises: transmitting configuration information of at least one initial upstream BWP candidate and configuration information of at least one RO to a terminal device;

the determining, according to the target RO, the target initial upstream bandwidth portion BWP corresponding to the terminal device includes: and determining a target initial upstream BWP corresponding to the terminal device in the at least one initial upstream BWP candidate according to the determined target RO.

determining a target initial upstream BWP corresponding to the terminal device in the at least one initial upstream BWP candidate according to the determined target RO, including: and determining the target initial upstream BWP corresponding to the terminal device according to the determined initial upstream BWP candidate corresponding to the target RO.

determining a target initial upstream BWP corresponding to the terminal device in the at least one initial upstream BWP candidate according to the determined target RO, including: and determining the target initial upstream BWP corresponding to the terminal device according to the initial upstream BWP candidate corresponding to the determined target RO.

determining a target initial upstream BWP corresponding to the terminal device in the at least one initial upstream BWP candidate according to the determined target RO, where the determining includes any of: determining at least one initial upstream BWP candidate corresponding to the target RO, and determining a target initial upstream BWP corresponding to the terminal device according to the priority corresponding to each initial upstream BWP candidate; determining at least one initial upstream BWP candidate corresponding to the target RO, and determining a target initial upstream BWP corresponding to the terminal device according to a start frequency and/or a center frequency respectively corresponding to each initial upstream BWP candidate; and determining a target initial upstream BWP corresponding to the terminal device according to first indication information corresponding to the target RO, wherein the first indication information is used for indicating an initial upstream BWP candidate uniquely corresponding to each RO.

Optionally, the determining, according to the target RO, the target initial upstream bandwidth portion BWP corresponding to the terminal device includes any one of: determining a starting frequency or a center frequency corresponding to the target RO, and determining a target initial upstream BWP corresponding to the terminal device according to the starting frequency or the center frequency; the center frequency of the frequency domain range corresponding to the target initial uplink BWP is the same as the starting frequency or the center frequency corresponding to the target RO, and the frequency domain width of the frequency domain range corresponding to the target initial uplink BWP is indicated to the terminal device by the network device or predefined; determining an initial frequency corresponding to the target RO, and determining a target initial upstream BWP corresponding to the terminal device according to the initial frequency; the starting frequency of the frequency domain range corresponding to the target initial upstream BWP is the same as the starting frequency corresponding to the target RO, and the frequency domain width of the frequency domain range corresponding to the target initial upstream BWP is indicated to the terminal device by the network device or is predefined.

Optionally, the determining, according to the target RO, the target initial upstream bandwidth portion BWP corresponding to the terminal device includes any one of the following: determining a starting frequency or a central frequency corresponding to a designated RO corresponding to the target RO, and determining a target initial uplink BWP corresponding to the terminal device according to the starting frequency or the central frequency; the center frequency of the frequency domain range corresponding to the target initial uplink BWP is the same as the start frequency or the center frequency corresponding to the designated RO, and the frequency domain width of the frequency domain range corresponding to the target initial uplink BWP is indicated to the terminal device by the network device or is predefined; determining an initial frequency corresponding to a designated RO corresponding to the target RO, and determining a target initial upstream BWP corresponding to the terminal device according to the initial frequency; the starting frequency of the frequency domain range corresponding to the target initial upstream BWP is the same as the starting frequency corresponding to the designated RO, and the frequency domain width of the frequency domain range corresponding to the target initial upstream BWP is indicated to the terminal device by the network device or is predefined.

It should be noted that, the terminal device and the network device provided in the embodiments of the present application can implement all the method steps implemented by the foregoing method embodiments, and can achieve the same technical effects, and detailed descriptions of the same parts and beneficial effects as those of the method embodiments in this embodiment are not repeated herein.

Fig. 10 is a schematic structural diagram of a random access apparatus provided in an embodiment of the present application, where the apparatus is applied to a terminal device, and as shown in fig. 10, the apparatus includes:

the first determination unit 1000 is provided with a first determination unit, the method comprises the steps of determining a target random access channel opportunity (RO) for initiating random access;

a second determining unit 1010 for determining a target initial upstream bandwidth part BWP according to the target RO.

Optionally, the apparatus further comprises:

a receiving unit 1020, configured to receive configuration information of at least one initial upstream BWP candidate and configuration information of at least one RO sent by a network device;

the second determining unit 1010 is configured to: determining a target initial upgoing BWP among the at least one initial upgoing BWP candidate according to the determined target RO.

the second determining unit 1010 is configured to: and determining the target initial upstream BWP according to the initial upstream BWP candidate corresponding to the determined target RO.

the second determining unit 1010 is configured to perform any one of the following steps:

Optionally, the second determining unit 1010 is configured to perform any one of the following steps:

determining a starting frequency or a central frequency corresponding to the target RO, and determining a target initial upstream BWP according to the starting frequency or the central frequency; the center frequency of the frequency domain range corresponding to the target initial uplink BWP is the same as the start frequency or the center frequency corresponding to the target RO, and the frequency domain width of the frequency domain range corresponding to the target initial uplink BWP is indicated by the network device or predefined;

determining an initial frequency corresponding to a designated RO corresponding to the target RO, and determining a target initial upstream BWP according to the initial frequency; the starting frequency of the frequency domain range corresponding to the target initial upstream BWP is the same as the starting frequency corresponding to the designated RO, and the frequency domain width of the frequency domain range corresponding to the target initial upstream BWP is indicated by the network device or predefined.

Fig. 11 is a schematic structural diagram of a random access apparatus provided in an embodiment of the present application, where the apparatus is applied to a network device, and as shown in fig. 11, the apparatus includes:

a third determining unit 1100, configured to determine a target random access channel opportunity RO used by the terminal device to initiate random access;

a fourth determining unit 1110, configured to determine, according to the target RO, a target initial upstream bandwidth part BWP corresponding to the terminal device.

Optionally, the apparatus further comprises:

a transmitting unit 1120 for transmitting configuration information of at least one initial upstream BWP candidate and configuration information of at least one RO to a terminal device;

the fourth determining unit 1110 is configured to: and determining a target initial upstream BWP corresponding to the terminal device among the at least one initial upstream BWP candidate according to the determined target RO.

the fourth determining unit 1110 is configured to: and determining the target initial upstream BWP corresponding to the terminal device according to the initial upstream BWP candidate corresponding to the determined target RO.

the fourth determining unit 1110 is configured to perform any one of the following steps:

Optionally, the fourth determining unit 1110 is configured to perform any one of the following steps:

determining a starting frequency or a center frequency corresponding to the target RO, and determining a target initial uplink BWP corresponding to the terminal device according to the starting frequency or the center frequency; the center frequency of the frequency domain range corresponding to the target initial uplink BWP is the same as the starting frequency or the center frequency corresponding to the target RO, and the frequency domain width of the frequency domain range corresponding to the target initial uplink BWP is indicated to the terminal device by the network device or predefined;

It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented as a software functional unit and sold or used as a stand-alone product, may be stored in a processor readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to 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 (RAM), a magnetic disk, an optical disk, or other various media capable of storing program codes.

It should be noted that the apparatus provided in the embodiment of the present application can implement all the method steps implemented by the method embodiment and achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are omitted here.

On the other hand, an embodiment of the present application further provides a processor-readable storage medium, where the processor-readable storage medium stores a computer program, where the computer program is configured to cause the processor to execute the random access method provided in each of the above embodiments, and the method includes: determining a target random access channel opportunity (RO) for initiating random access; based on the target RO, a target initial upstream bandwidth portion BWP is determined.

On the other hand, an embodiment of the present application further provides a processor-readable storage medium, where the processor-readable storage medium stores a computer program, where the computer program is configured to enable the processor to execute the random access method provided in the foregoing embodiments, and the method includes: determining a target random access channel opportunity (RO) used for initiating random access by a terminal device; and determining a target initial upstream bandwidth part BWP corresponding to the terminal device according to the target RO.

The processor-readable storage medium may be any available media or data storage device that can be accessed by a processor, including, but not limited to, magnetic memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, non-volatile memory (NAND FLASH), solid State Disks (SSDs)), etc.

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

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

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

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

The technical scheme provided by the embodiment of the application can be suitable for various systems, particularly 5G systems. For example, the applicable system may be a global system for mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS) system, a long term evolution (long term evolution, LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD) system, an LTE-a (long term evolution) system, a universal mobile system (universal mobile telecommunications system, UMTS), a universal internet Access (WiMAX) system, a New Radio Network (NR) system, etc. These various systems include terminal devices and network devices. The System may further include a core network portion, such as an Evolved Packet System (EPS), a 5G System (5 GS), and the like.

The terminal device referred to in the embodiments of the present application may be a device providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or other processing device connected to a wireless modem. In different systems, the names of the terminal devices may be different, for example, in a 5G system, the terminal device may be called a User Equipment (UE). A wireless terminal device, which may be a mobile terminal device such as a mobile telephone (or "cellular" telephone) and a computer having a mobile terminal device, e.g., a portable, pocket, hand-held, computer-included or vehicle-mounted mobile device, may communicate with one or more Core Networks (CNs) via a Radio Access Network (RAN), and may exchange language and/or data with the RAN. Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, session Initiation Protocol (SIP) phones, wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). The wireless terminal device may also be referred to as a system, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile station), a remote station (remote station), an access point (access point), a remote terminal (remote terminal), an access terminal (access terminal), a user terminal (user terminal), a user agent (user agent), and a user device (user device), which is not limited in this embodiment.

The network device according to the embodiment of the present application may be a base station, and the base station may include a plurality of cells for serving a terminal. A base station may also be referred to as an access point, or a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or by other names, depending on the particular application. The network device may be configured to exchange received air frames with Internet Protocol (IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiment of the present application may be a Base Transceiver Station (BTS) in a Global System for Mobile communications (GSM) or a Code Division Multiple Access (CDMA), a network device (NodeB) in a Wideband Code Division Multiple Access (WCDMA), an evolved Node B (eNB) or an e-NodeB) in a Long Term Evolution (LTE) System, a 5G Base Station (gNB) in a 5G network architecture (next generation System), a Home evolved Node B (HeNB), a relay Node (relay Node), a Home Base Station (femto), a pico Base Station (pico), and the like, which are not limited in the embodiments of the present application. In some network architectures, a network device may include a Centralized Unit (CU) node and a Distributed Unit (DU) node, which may also be geographically separated.

Multiple Input Multiple Output (MIMO) transmission may be performed between the network device and the terminal device by using one or more antennas, where the MIMO transmission may be Single User MIMO (SU-MIMO) or Multi-User MIMO (MU-MIMO). The MIMO transmission may be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, or may be diversity transmission, precoding transmission, beamforming transmission, or the like, depending on the form and number of root antenna combinations.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A random access method is applied to a terminal device, and the method comprises the following steps:

2. The random access method of claim 1, wherein the method further comprises:

3. The random access method according to claim 2, wherein there is no overlap between sets of ROs corresponding to each of the initial upstream BWP candidates;

4. The random access method according to claim 2, wherein the sets of ROs corresponding to the initial upstream BWP candidates do not overlap with each other, and ROs corresponding to the same synchronization signal block SSB correspond to the same initial upstream BWP candidate;

5. The random access method according to claim 2, wherein there is an overlap between sets of ROs corresponding to each of the initial upstream BWP candidates;

said determining, in accordance with the determined target RO, the target initial upstream BWP in the at least one initial upstream BWP candidate, including any of:

determining at least one initial upstream BWP candidate corresponding to the target RO, and determining the target initial upstream BWP according to the start frequency and/or the center frequency respectively corresponding to each initial upstream BWP candidate;

6. The random access method according to any of claims 3-5, wherein the RO corresponding to the initial upstream BWP candidate is an RO whose frequency domain range is included in the frequency domain range of the initial upstream BWP candidate.

7. The random access method according to claim 1, wherein the determining a target initial upstream bandwidth portion BWP according to the target RO comprises any of:

8. The random access method according to claim 1, wherein the determining a target initial upstream bandwidth portion BWP according to the target RO comprises any one of:

determining a starting frequency or a central frequency corresponding to the designated RO corresponding to the target RO, and determining a target initial upstream BWP according to the starting frequency or the central frequency; wherein a center frequency of a frequency domain range corresponding to the target initial upstream BWP is the same as a start frequency or a center frequency corresponding to the specified RO, and a frequency domain width of the frequency domain range corresponding to the target initial upstream BWP is indicated by the network device or is predefined;

9. A random access method applied to a network device, the method comprising:

10. The random access method of claim 9, wherein the method further comprises:

11. The random access method according to claim 10, wherein there is no overlap between sets of ROs corresponding to each of the initial upstream BWP candidates;

12. The random access method according to claim 10, wherein the sets of ROs corresponding to the initial upstream BWP candidates do not overlap with each other, and ROs corresponding to a same synchronization signal block SSB correspond to a same initial upstream BWP candidate;

13. The random access method according to claim 10, wherein there is an overlap between sets of ROs corresponding to each of the initial upstream BWP candidates;

and determining a target initial upstream BWP corresponding to the terminal device according to first indication information corresponding to the target ROs, where the first indication information is used to indicate an initial upstream BWP candidate uniquely corresponding to each RO.

14. The random access method according to any of claims 11-13, wherein the RO corresponding to the initial upstream BWP candidate is an RO whose frequency domain range is included in the frequency domain range of the initial upstream BWP candidate.

15. The random access method according to claim 9, wherein the determining, according to the target RO, a target initial upstream bandwidth portion BWP corresponding to the terminal device includes any one of:

determining a starting frequency corresponding to the target RO, and determining a target initial upstream BWP corresponding to the terminal device according to the starting frequency; wherein a start frequency of a frequency domain range corresponding to the target initial upstream BWP is the same as a start frequency corresponding to the target RO, and a frequency domain width of the frequency domain range corresponding to the target initial upstream BWP is indicated to the terminal device by the network device or is predefined.

16. The random access method according to claim 9, wherein the determining, according to the target RO, a target initial upstream bandwidth portion BWP corresponding to the terminal device includes any one of:

determining a starting frequency or a center frequency corresponding to a designated RO corresponding to the target RO, and determining a target initial uplink BWP corresponding to the terminal device according to the starting frequency or the center frequency; wherein a center frequency of a frequency domain range corresponding to the target initial upstream BWP is the same as a start frequency or a center frequency corresponding to the specified RO, and a frequency domain width of the frequency domain range corresponding to the target initial upstream BWP is indicated to the terminal device by the network device or is predefined;

17. A terminal device comprising a memory, a transceiver, a processor:

a memory for storing a computer program; a transceiver for transceiving data under control of the processor; a processor for reading the computer program in the memory and performing the following:

18. The terminal device of claim 17, wherein the operations further comprise:

19. The terminal device of claim 18, wherein there is no overlap between sets of ROs corresponding to each of the initial upstream BWP candidates;

said determining, in accordance with the determined target RO, the target initial upstream BWP among the at least one initial upstream BWP candidate comprises:

20. The terminal device of claim 18, wherein the sets of ROs corresponding to each initial upstream BWP candidate do not overlap with each other, and ROs corresponding to a same synchronization signal block SSB correspond to a same initial upstream BWP candidate;

21. The terminal device of claim 18, wherein there is an overlap between sets of ROs for each of the initial upstream BWP candidates;

22. The terminal device according to any of claims 19-21, wherein the RO corresponding to the initial upgoing BWP candidate is an RO whose frequency domain range is comprised within the frequency domain range of the initial upgoing BWP candidate.

23. The terminal device of claim 17, wherein determining a target initial upstream bandwidth portion BWP according to the target RO comprises any of:

determining a starting frequency or a center frequency corresponding to the target RO, and determining a target initial upstream BWP according to the starting frequency or the center frequency; wherein, the center frequency of the frequency domain range corresponding to the target initial uplink BWP is the same as the start frequency or center frequency corresponding to the target RO, and the frequency domain width of the frequency domain range corresponding to the target initial uplink BWP is indicated by the network device or predefined;

24. The terminal device of claim 17, wherein determining a target initial upstream bandwidth portion BWP based on the target RO comprises any of:

determining a starting frequency corresponding to a designated RO corresponding to the target RO, and determining a target initial upstream BWP according to the starting frequency; wherein, the starting frequency of the frequency domain range corresponding to the target initial uplink BWP is the same as the starting frequency corresponding to the designated RO, and the frequency domain width of the frequency domain range corresponding to the target initial uplink BWP is indicated by the network device or predefined.

25. A network device comprising a memory, a transceiver, a processor:

a memory for storing a computer program; a transceiver for transceiving data under the control of the processor; a processor for reading the computer program in the memory and performing the following operations:

26. The network device of claim 25, wherein the operations further comprise:

determining a target initial upstream BWP corresponding to the terminal device among the at least one initial upstream BWP candidate according to the determined target RO.

27. The network device of claim 26, wherein there is no overlap between sets of ROs corresponding to each of the initial upstream BWP candidates;

28. The network device of claim 26, wherein the sets of ROs for each initial upstream BWP candidate do not overlap and ROs for a same synchronization signal block SSB correspond to a same initial upstream BWP candidate;

29. The network device of claim 26, wherein there is an overlap between sets of ROs for each of the initial upstream BWP candidates;

30. The network device of any of claims 27-29, wherein the RO corresponding to the initial upstream BWP candidate is an RO whose frequency domain range is included in the frequency domain range of the initial upstream BWP candidate.

31. The network device of claim 25, wherein the determining, according to the target RO, a target initial upstream bandwidth portion BWP corresponding to the terminal device comprises any of:

determining a starting frequency or a center frequency corresponding to the target RO, and determining a target initial upstream BWP corresponding to the terminal device according to the starting frequency or the center frequency; wherein, the center frequency of the frequency domain range corresponding to the target initial uplink BWP is the same as the start frequency or center frequency corresponding to the target RO, and the frequency domain width of the frequency domain range corresponding to the target initial uplink BWP is indicated to the terminal device by the network device or is predefined;

32. The network device of claim 25, wherein the determining, according to the target RO, a target initial upstream bandwidth portion BWP corresponding to the terminal device comprises any of:

determining a starting frequency corresponding to a designated RO corresponding to the target RO, and determining a target initial upstream BWP corresponding to the terminal device according to the starting frequency; wherein, the starting frequency of the frequency domain range corresponding to the target initial uplink BWP is the same as the starting frequency corresponding to the designated RO, and the frequency domain width of the frequency domain range corresponding to the target initial uplink BWP is indicated to the terminal device by the network device or predefined.

33. A random access apparatus, applied to a terminal device, the apparatus comprising:

a first determining unit for determining a target random access channel occasion RO for initiating random access;

34. A random access apparatus, applied to a network device, the apparatus comprising:

35. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing a processor to perform the method of any one of claims 1 to 8, or to perform the method of any one of claims 9 to 16.