CN111212449A

CN111212449A - Random access method, terminal and network side equipment

Info

Publication number: CN111212449A
Application number: CN201811399909.3A
Authority: CN
Inventors: 刘洋; 李男
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2018-11-22
Filing date: 2018-11-22
Publication date: 2020-05-29
Anticipated expiration: 2038-11-22
Also published as: CN111212449B

Abstract

The invention provides a random access method, a terminal and a network side device, wherein the random access method comprises a scheme that a plurality of initial uplink BWPs correspond to one initial downlink BWP and one initial uplink BWP corresponds to a plurality of initial downlink BWPs. The many-to-one scheme applied to the terminal comprises the following steps: determining a first uplink BWP, and sending a random access request; and receiving the random access response message, acquiring the uplink authorized resource corresponding to the first uplink BWP, and sending the MSG 3. The one-to-many scheme includes: sending a random access request, and receiving random access response messages sent by network side equipment at least one initial downlink BWP, wherein each random access response message corresponds to one initial downlink BWP; and selecting a random access response message, acquiring uplink authorization resources for sending the MSG3, and sending the MSG 3. When the UE is initially accessed, the UE can be scattered, and the simultaneous network access of a plurality of UEs can be supported, so that the expectation of 5G on large-scale connection is met.

Description

Random access method, terminal and network side equipment

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a random access method, a terminal, and a network device.

Background

Currently, the third Generation Partnership Project (3 GPP) RAN2 has agreed to a scheme for applying a Bandwidth Part (BWP) in the fifth Generation mobile communication technology (5th-Generation, 5G). BWP is a scheme that divides a large bandwidth into multiple possibly overlapping different parts and aims to provide different types of communication services for terminals (UE). When the UE is not in the active state, it may also be considered to switch (switch) the UE to a smaller bandwidth, thereby saving more power. For initial access, the current RAN2 supports an initial (initial) BWP by default, i.e., an initial uplink bandwidth part (initial UL BWP) and an initial downlink bandwidth part (initial DL BWP) correspond.

Currently, the application scenario of 5G includes supporting ultra-large-scale connection, but the current scheme of an initial BWP cannot provide good support for this, because many UEs concentrate on this initial BWP for random access. Moreover, the current solution of configuring only one BWP for initial access (initial access) must configure a relatively large bandwidth to support a large number of UEs for initial access, but the configuration method of a single large bandwidth is highly required for the terminal rf device, and the configuration of an excessively large bandwidth also causes a problem of too fast battery consumption. This is clearly not friendly to the type of terminal such as NB-IOT.

Therefore, how to support more kinds of UEs to access the network simultaneously and save the transmission resources for random access is a technical problem to be solved.

Disclosure of Invention

In view of this, the present invention provides a random access method, a terminal and a network device, which are used to solve the problem that a large bandwidth must be configured to support a large number of terminals for initial access.

In order to solve the above technical problem, in a first aspect, the present invention provides a random access method, applied to a terminal, including:

determining an initial upstream bandwidth portion BWP as a first upstream BWP from the N initial upstream BWPs, wherein N is a positive integer greater than or equal to 2;

sending a random access request at the first upstream BWP;

receiving a random access response message sent by network side equipment;

acquiring an uplink authorized resource corresponding to the first uplink BWP from the random access response message;

and transmitting the MSG3 on the acquired uplink authorized resource.

Preferably, the random access response message further includes a corresponding relationship between a random access radio network temporary identifier RA-RNTI and the index number of the first uplink BWP;

the step of acquiring the uplink granted resource corresponding to the first uplink BWP from the random access response message includes:

acquiring the RA-RNTI according to the corresponding relation between the RA-RNTI and the index number;

and decoding the random access response message according to the RA-RNTI to acquire an uplink authorized resource corresponding to the first uplink BWP.

Preferably, the random access request includes a random access preamble;

the random access response message includes: n response protocol data units connected in series, wherein each response protocol data unit corresponds to an initial uplink BWP, each response protocol data unit carries an index number of the corresponding initial uplink BWP, each response protocol data unit includes a response sub-protocol data unit corresponding to a random access preamble, and the response sub-protocol data unit includes: the uplink grant resource is used for sending MSG3, N is a positive integer greater than or equal to 2 and less than or equal to N;

acquiring a response protocol data unit corresponding to the first uplink BWP according to the index number of the first uplink BWP;

searching a response sub-protocol data unit corresponding to the random access preamble in the random access request in a response protocol data unit corresponding to the first uplink BWP;

and acquiring the uplink authorized resource corresponding to the first uplink BWP from the searched response sub-protocol data unit.

Preferably, the response subprotocol data units corresponding to the same random access preamble code all have different uplink grant resources for transmitting the MSG 3.

Preferably, before the step of determining an initial upstream BWP from the N initial upstream bandwidth portions BWP as the first upstream BWP, the method further includes:

receiving configuration information sent by the network side device, wherein the configuration information includes: a frequency range of the N initial upstream BWPs and an index number corresponding to each of the initial upstream BWPs.

In a second aspect, the present invention further provides a random access method, applied to a network side device, including:

receiving a random access request sent by a terminal at a first uplink BWP, wherein the first uplink BWP is an initial uplink BWP determined by the terminal from N initial uplink BWPs, and N is a positive integer greater than or equal to 2;

sending a random access response message to the terminal;

decoding the MSG3 sent by the terminal in a search space corresponding to the first upstream BWP.

Preferably, the random access response message further includes a corresponding relationship between a random access radio network temporary identifier RA-RNTI and the index number of the first uplink BWP.

Preferably, the step of receiving the random access request sent by the terminal at the first uplink BWP includes:

receiving random access requests sent by a plurality of terminals in N initial uplink BWPs, wherein each random access request comprises a random access preamble, and N is a positive integer greater than or equal to 2 and less than or equal to N;

the random access response message includes: n response protocol data units connected in series, wherein each response protocol data unit corresponds to an initial uplink BWP, each response protocol data unit carries an index number of the corresponding initial uplink BWP, each response protocol data unit includes a response sub-protocol data unit corresponding to a random access preamble, and the response sub-protocol data unit includes: and the uplink grant resource is used for transmitting the MSG 3.

Preferably, before the step of sending the random access request by the first uplink BWP, the receiving terminal further includes:

sending configuration information to the terminal, wherein the configuration information comprises: a frequency range of the N initial upstream BWPs and an index number corresponding to each of the initial upstream BWPs.

In a third aspect, the present invention further provides a random access method, applied to a terminal, including:

sending a random access request to network side equipment;

receiving a random access response message sent by the network-side device at least one initial downlink BWP, where the random access response message includes: an uplink grant resource configured to send MSG3, where each random access response message corresponds to one initial downlink BWP, where the at least one initial downlink BWP is at least one initial downlink BWP of M initial downlink BWPs configured by the network-side device, and M is a positive integer greater than or equal to 2;

selecting one random access response message, and acquiring uplink authorization resources used for sending the MSG3 in the selected random access response message;

and sending the MSG3 on the acquired uplink authorized resource.

Preferably, the random access request includes a random access preamble;

the random access response message includes: a response sub-protocol data unit corresponding to the random access preamble, the response sub-protocol data unit comprising: the uplink grant resource for transmitting the MSG 3;

the received random access response message is at least one of the M random access response messages sent by the network side equipment;

the uplink grant resources for sending the MSG3 are all different in the response subprotocol data units corresponding to the same random access preamble in the M random access response messages;

the step of selecting one random access response message and acquiring the uplink grant resource for sending the MSG3 in the selected random access response message includes:

and acquiring a response sub-protocol data unit corresponding to the random access preamble sent by the terminal from the selected random access response message, wherein the response sub-protocol data unit is used for sending the uplink authorization resource of the MSG 3.

Preferably, the random access request includes a random access preamble;

each of the random access response messages includes: p response sub-protocol data units, each response sub-protocol data unit corresponding to a random access preamble, the response sub-protocol data unit comprising: an uplink grant resource for transmitting MSG 3;

p is the number of the random access preamble codes received by the network side device, and is a positive integer greater than or equal to 1.

In a fourth aspect, the present invention further provides a random access method, applied to a network side device, including:

receiving a random access request sent by a terminal;

respectively sending random access response messages to the terminal on the configured M initial downlink BWPs, wherein each random access response message corresponds to one initial downlink BWP, and the random access response messages include: the uplink grant resource is used for sending MSG3, and M is a positive integer greater than or equal to 2;

decoding the MSG3 sent by the terminal.

Preferably, the random access request includes a random access preamble;

the step of sending a random access response message to the terminal on the configured M initial downlink BWPs includes:

sending a random access response message to the terminal on each initial downlink BWP;

and in response sub-protocol data units corresponding to the same random access preamble in the M random access response messages, uplink grant resources for sending the MSG3 are all different.

Preferably, the step of receiving the random access request sent by the terminal includes:

receiving random access requests sent by a plurality of terminals, wherein each random access request comprises a random access lead code, the number of the received random access lead codes is P, and P is a positive integer greater than or equal to 1;

each of the random access response messages includes: p response sub-protocol data units, each response sub-protocol data unit corresponding to a random access preamble, the response sub-protocol data unit comprising: and the uplink grant resource is used for transmitting the MSG 3.

In a fifth aspect, the present invention further provides a terminal, including:

a processor configured to determine an initial upstream bandwidth portion BWP as a first upstream BWP from N initial upstream BWPs, where N is a positive integer greater than or equal to 2;

a transceiver for transmitting a random access request at the first upstream BWP; receiving a random access response message sent by network side equipment;

the processor is configured to acquire an uplink grant resource corresponding to the first uplink BWP from the random access response message;

and the transceiver is configured to send the MSG3 on the acquired uplink grant resource.

the processor is used for acquiring the RA-RNTI according to the corresponding relation between the RA-RNTI and the index number; and decoding the random access response message according to the RA-RNTI to acquire an uplink authorized resource corresponding to the first uplink BWP.

Preferably, the random access request includes a random access preamble;

the processor is configured to obtain a response protocol data unit corresponding to the first uplink BWP according to the index number of the first uplink BWP; searching a response sub-protocol data unit corresponding to the random access preamble in the random access request in a response protocol data unit corresponding to the first uplink BWP; and acquiring the uplink authorized resource corresponding to the first uplink BWP from the searched response sub-protocol data unit.

Preferably, the transceiver is further configured to receive configuration information sent by the network side device, where the configuration information includes: a frequency range of the N initial upstream BWPs and an index number corresponding to each of the initial upstream BWPs.

In a sixth aspect, the present invention further provides a network side device, including:

a transceiver, configured to receive a random access request sent by a terminal at a first uplink BWP, where the first uplink BWP is an initial uplink BWP determined by the terminal from N initial uplink BWPs, and N is a positive integer greater than or equal to 2; sending a random access response message to the terminal; decoding the MSG3 sent by the terminal in a search space corresponding to the first upstream BWP.

Preferably, the transceiver is configured to receive random access requests sent by a plurality of terminals at N initial uplink BWPs, where each random access request includes a random access preamble, N is a positive integer greater than or equal to 2 and less than or equal to N;

Preferably, the transceiver is further configured to send configuration information to the terminal, where the configuration information includes: a frequency range of the N initial upstream BWPs and an index number corresponding to each of the initial upstream BWPs.

In a seventh aspect, the present invention further provides a terminal, including:

the transceiver is used for sending a random access request to the network side equipment; receiving a random access response message sent by the network-side device at least one initial downlink BWP, where the random access response message includes: an uplink grant resource configured to send MSG3, where each random access response message corresponds to one initial downlink BWP, where the at least one initial downlink BWP is at least one initial downlink BWP of M initial downlink BWPs configured by the network-side device, and M is a positive integer greater than or equal to 2;

the processor is used for selecting one random access response message and acquiring the uplink authorization resource used for sending the MSG3 in the selected random access response message;

the transceiver is configured to send the MSG3 on the acquired uplink grant resource.

Preferably, the random access request includes a random access preamble;

In an eighth aspect, the present invention further provides a network side device, including:

the transceiver is used for receiving a random access request sent by a terminal; respectively sending random access response messages to the terminal on the configured M initial downlink BWPs, wherein each random access response message corresponds to one initial downlink BWP, and the random access response messages include: the uplink grant resource is used for sending MSG3, and M is a positive integer greater than or equal to 2; decoding the MSG3 sent by the terminal.

Preferably, the random access request includes a random access preamble;

the transceiver is configured to send a random access response message to the terminal on each initial downlink BWP; the random access response message includes: a response sub-protocol data unit corresponding to the random access preamble, the response sub-protocol data unit comprising: the uplink grant resource for transmitting the MSG 3; and in response sub-protocol data units corresponding to the same random access preamble in the M random access response messages, uplink grant resources for sending the MSG3 are all different.

Preferably, the transceiver is configured to receive random access requests sent by multiple terminals, where each random access request includes a random access preamble, and the number of the received random access preambles is P, where P is a positive integer greater than or equal to 1;

In a ninth aspect, the present invention also provides a terminal, comprising a memory, a processor and a computer program stored on the memory and executable on the processor; the processor implements any of the above random access methods applied to the terminal when executing the computer program.

In a tenth aspect, the present invention further provides a network-side device, including a memory, a processor, and a computer program stored in the memory and executable on the processor; the processor implements any one of the above random access methods applied to the network side device when executing the computer program.

In an eleventh aspect, the present invention also provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps in any one of the random access methods described above.

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

in the embodiment of the invention, the terminal initiates random access on the first uplink BWP, acquires the corresponding uplink authorized resource from the random access response message replied by the network side equipment, and sends the MSG3 on the corresponding uplink authorized resource, so that the UE can be scattered during initial access, thereby supporting the simultaneous network access of a plurality of UEs and meeting the expectation of 5G on large-scale connection.

Drawings

FIG. 1 is a diagram illustrating a plurality of initial upstream BWPs corresponding to an initial downstream BWP in accordance with the present invention;

FIG. 2 is a diagram illustrating an initial upstream BWP corresponding to a plurality of initial downstream BWPs, in accordance with the present invention;

fig. 3 is a flowchart illustrating a random access method according to a first embodiment of the present invention;

FIG. 4 is a diagram illustrating a structure of a data unit in a random response message according to an embodiment of the present invention;

fig. 5 is a flowchart illustrating a random access method according to a second embodiment of the present invention;

fig. 6 is a flowchart illustrating a random access method according to a third embodiment of the present invention;

FIGS. 7-10 are schematic structural diagrams of data units in a random response message according to embodiments of the present invention;

fig. 11 is a flowchart illustrating a random access method according to a fourth embodiment of the present invention;

fig. 12 is a schematic structural diagram of a terminal according to a fifth embodiment of the present invention;

fig. 13 is a schematic structural diagram of a network-side device according to a sixth embodiment of the present invention;

fig. 14 is a schematic structural diagram of a terminal according to a seventh embodiment of the present invention;

fig. 15 is a schematic structural diagram of a network-side device according to an eighth embodiment of the present invention;

fig. 16 is a schematic structural diagram of a terminal according to a ninth embodiment of the present invention;

fig. 17 is a schematic structural diagram of a network-side device according to a tenth embodiment of the present invention;

fig. 18 is a schematic structural diagram of a terminal according to an eleventh embodiment of the present invention;

fig. 19 is a schematic structural diagram of a network-side device according to a twelfth embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.

First, the principle of the embodiment of the present invention will be briefly described.

Referring to fig. 1, fig. 1 is a schematic diagram illustrating a plurality of initial upstream BWPs corresponding to an initial downstream BWP according to the present invention. I.e., many-to-one initial BWP. The random access procedure of the scheme comprises the following steps:

step 11: at least one UE initiates random access (i.e., sends MSG1) with possibly overlapping random access preambles at different initial UL BWPs.

Step 12: the network side device monitors that at least n UEs initiate a random access process on the random access time-frequency resources corresponding to n initial UL BWPs.

Step 13: the network side device replies to a UE performing Random Access on a different initial DL BWP on an initial DL BWP with a Random Access Response message (RAR, also called MSG2), where the MSG2 includes following information applicable to Random Access, for example: an uplink grant resource (UL grant) for transmitting MSG3, and the like.

Step 14: after receiving the MSG2, each UE acquires a UL grant for transmitting MSG3 corresponding to the UE (i.e., corresponding to an initial UL bwp transmitted by the UE MSG1 and corresponding to a random access preamble transmitted by the UE);

step 15: the UE sends MSG3 on the specified UL grant, and the network side device decodes MSG3 sent by the UE in the search space corresponding to the initial UL BWP and performs conflict contention resolution.

According to the multi-to-one initial BWP scheme, the UE initiates random access on different small bandwidths, more types of UE can be supported to access the network simultaneously, and energy consumption is saved; the network side device replies the MSG2 at an initial DL BWP, which is beneficial to saving downlink transmission resources for random access, and the MSG2 includes uplink grant resources for transmitting MSG3 corresponding to the UE, so that the UE can be scattered during initial access, and multiple UEs can be supported to perform network access simultaneously.

Referring to fig. 2, fig. 2 is a schematic diagram illustrating an initial upstream BWP corresponding to a plurality of initial downstream BWPs according to the present invention. I.e., one-to-many initial BWP. The random access procedure of the scheme comprises the following steps:

step 21: at least one UE initiates random access (i.e., sends MSG1) with a possibly overlapping random access preamble at an initial UL BWP.

Step 22: after monitoring the MSG1 sent by the UE in the initial UL BWP, the network side device replies to the MSG2 on each initial dl BWP, where each replied MSG2 includes following information applicable to random access, such as: an uplink grant resource (UL grant) for transmitting MSG3, and the like.

Step 23: after each UE receives at least one MSG2 sent by network side equipment, randomly selecting one MSG2, and acquiring a UL grant which corresponds to a random access preamble sent by the UE and is used for sending MSG 3;

step 24: the UE transmits MSG3 on the specified UL grant, and the network side equipment decodes MSG3 transmitted by the UE in the search space and performs conflict contention resolution.

According to the one-to-many initial BWP scheme, random access is initiated on one initial UL BWP of the UE, so that uplink sending resources for random access can be saved; the network side equipment replies MSG2 on a plurality of small bandwidths respectively, thereby being beneficial to different types of UE to access the network simultaneously, saving the energy consumption of the UE, and each MSG2 comprises uplink authorization resources which are used for sending MSG3 and correspond to the random access lead code sent by the UE, thereby scattering the UE when initially accessing and supporting a plurality of UEs to access the network simultaneously.

The following embodiments of the present invention are based on the above-described principle. Embodiments one, two, five, six, nine and ten of the present invention are obtained by a scheme based on many-to-one initial BWP, and embodiments three, four, seven, eight, eleven and twelve are obtained by a scheme based on one-to-many initial BWP.

Referring to fig. 3, fig. 3 is a flowchart illustrating a random access method according to a first embodiment of the present invention, where the method is applied to a terminal, and includes the following steps:

step 31: determining an initial uplink BWP as a first uplink BWP from the N initial uplink BWPs, wherein N is a positive integer greater than or equal to 2;

step 32: sending a random access request at the first upstream BWP;

step 33: receiving a random access response message sent by network side equipment;

step 34: acquiring an uplink authorized resource corresponding to the first uplink BWP from the random access response message;

step 35: and transmitting the MSG3 on the acquired uplink authorized resource.

In the random access method provided by the embodiment of the invention, the terminal initiates random access on the first uplink BWP, acquires the corresponding uplink authorized resource from the random access response message replied by the network side device, and sends the MSG3 on the corresponding uplink authorized resource, so that the UE can be scattered during initial access, thereby supporting multiple UEs to perform network access simultaneously, and meeting the expectation of 5G on large-scale connection.

In the embodiment of the invention, the UE receives the random access response message and acquires the uplink authorization resource for sending the MSG3 according to the index number of the first uplink BWP of the random access request sent by the UE. There are various random access response messages sent by the network side device, which are described below by way of example.

As one of the optional specific embodiments: the Random Access response message further includes a corresponding relationship between a Random Access-Radio Network Temporary Identity (RA-RNTI) and the index number of the first uplink BWP;

Specifically, the corresponding relationship between the RA-RNTI and the index number may be a function relationship between the RA-RNTI and the index number determined by taking the index (index) of the first uplink BWP as an independent variable and the RA-RNTI as a dependent variable. That is, the RA-RNTI is bound with the index number.

After receiving the random access response message (MSG2), the UE decodes the MSG2 by applying the RA-RNTI bound with the index number of the first uplink BWP to acquire an uplink grant resource corresponding to the first uplink BWP.

As another alternative embodiment: the random access request comprises a random access preamble;

Specifically, referring to fig. 4, fig. 4 is a schematic structural diagram of a data unit in a random response message according to an embodiment of the present invention. There are 2 initial uplink BWPs, the UE1 sends a Random Access request on the initial uplink BWP1, the UE2 sends a Random Access request on the initial uplink BWP2, the Random Access Preamble identifiers (RAPID identifiers) of the Random Access Preamble identifiers are assumed to be 1, that is, the RAPID is 1, and the Random Access Preamble Identifier is the same as the Random Access Preamble Identifier sent by the UE1 and the Random Access Preamble Identifier sent by the UE 2.

In the random response message returned by the network side device, RAR MAC (Media Access Control) PDUs (Protocol Data units) corresponding to different initial UL BWPs are serially processed. That is, the response protocol data unit 41 corresponding to the initial upbound BWP1 and the response protocol data unit 42 corresponding to the initial upbound BWP2 are concatenated, and the response protocol data unit 41 includes: the response sub-protocol data unit 411 corresponding to the random access preamble transmitted by the UE1, namely, the MAC sub-protocol data unit (sub pdu)3, includes in the response protocol data unit 42: a response sub-protocol data unit 421 (i.e., MAC sub-pdu 3') corresponding to the random access preamble transmitted by the UE 2. And reserved bits in the subheader of each RARMAC PDU may be used to indicate the index number of initial UL BWP, e.g., 2-bit reserved bit "0/0" in application extension/type/0/0/BI subheader 401 indicates the index number of initial UL BWP1, and 2-bit reserved bit "0/1" in application extension/type/0/1/backoff indication subheader 402 indicates the index number of initial UL BWP 2.

The UE1 receives the random access response message, and first finds the range of the subsequent MAC sub-pdu marked with the initial ul bwp1 index number of the random access request sent by the UE1, i.e. determines the range of the response pdu 41. Then, in the determined range, the MAC sub-pdu corresponding to the random access preamble used by the UE1 is searched, that is, the response sub-protocol data unit 411 in the response protocol data unit 41 is searched, and the UL grant information for msg3 transmission is acquired therefrom.

Still taking fig. 4 as an example, the response sub-protocol data unit 411 and the response sub-protocol data unit 421 both correspond to the same random access preamble, and the relative position of the UL grant (i.e. relative to the starting point of each UL BWP) in the response sub-protocol data unit 411 and the response sub-protocol data unit 421 and/or the absolute position allocated within the time-frequency resource of the whole base station cell are different. Therefore, the random access of the UE is further dispersed, and the random access of the UE is quicker.

In the embodiment of the present invention, at least 2 reserved bits in the subheader of each RAR MAC PDU may be used to indicate the index number of the initial UL BWP, or a bit in a newly added extended sub-protocol data unit (sub PDU) may be used to indicate the index number of the initial UL BWP.

In some preferred embodiments of the present invention, the random access response message includes: parameter information for transmitting MSG 3;

the step of sending the MSG3 on the acquired uplink grant resource includes:

and sending the MSG3 on the acquired uplink authorized resource by using the parameter information.

Specifically, the parameter information may include a Timing Advance (TA) and/or a Temporary Cell Radio Network Temporary Identifier (T _ C _ RNTI). And the terminal sends the MSG3 by using corresponding parameter information on the acquired uplink authorized resource.

In some preferred embodiments of the present invention, before the step of determining an initial upstream BWP from the N initial upstream bandwidth portions BWP as the first upstream BWP, the method further includes:

That is, the UE initiates random access on the initial uplink BWP configured by the network-side device, and the network-side device further configures an index number corresponding to each of the initial uplink BWPs to distinguish different initial uplink BWPs.

Based on the same inventive concept as the first embodiment of the invention, the invention also provides a random access method. Referring to fig. 5, fig. 5 is a flowchart illustrating a random access method according to a second embodiment of the present invention, where the method is applied to a network side device, and includes the following steps:

step 51: receiving a random access request sent by a terminal at a first uplink BWP, wherein the first uplink BWP is an initial uplink BWP determined by the terminal from N initial uplink BWPs, and N is a positive integer greater than or equal to 2;

step 52: sending a random access response message to the terminal;

step 53: decoding the MSG3 sent by the terminal in a search space corresponding to the first upstream BWP.

In the random access method provided in the embodiment of the present invention, the network side device receives the random access request sent by the terminal on the first uplink BWP, replies with the random access response message, so that the terminal obtains the corresponding uplink grant resource in the random access response message, and sends the MSG3 on the corresponding uplink grant resource, which can break up the UE during initial access, thereby supporting multiple UEs to perform network access simultaneously, and meeting the expectation of 5G for large-scale connection.

Preferably, the random access response message further includes a corresponding relationship between the RA-RNTI and the index number of the first uplink BWP.

Preferably, the random access response message includes: for transmitting parameter information of MSG 3.

The specific working process of the second embodiment of the present invention corresponds to the first embodiment, and therefore, detailed description thereof is omitted, and please refer to the description of the corresponding embodiment.

Referring to fig. 6, fig. 6 is a flowchart illustrating a random access method according to a third embodiment of the present invention, where the method is applied to a terminal, and includes the following steps:

step 61: sending a random access request to network side equipment;

step 62: receiving a random access response message sent by the network-side device at least one initial downlink BWP, where the random access response message includes: an uplink grant resource configured to send MSG3, where each random access response message corresponds to one initial downlink BWP, where the at least one initial downlink BWP is at least one initial downlink BWP of M initial downlink BWPs configured by the network-side device, and M is a positive integer greater than or equal to 2;

and step 63: selecting one random access response message, and acquiring uplink authorization resources used for sending the MSG3 in the selected random access response message;

step 64: and sending the MSG3 on the acquired uplink authorized resource.

In the random access method provided in the embodiment of the present invention, a terminal initiates random access, and receives a random access response message sent by a network-side device in at least one initial downlink BWP, where the random access response message includes: the uplink grant resource used for sending the MSG3 enables the terminal to send the MSG3 on the corresponding uplink grant resource, and can scatter the UEs at the initial access, thereby supporting multiple UEs to perform network access simultaneously, and meeting the expectation of 5G for large-scale connection.

In some preferred embodiments of the invention, the random access request comprises a random access preamble;

the uplink grant resources for sending the MSG3 in the response subprotocol data units corresponding to the same random access preamble in the M random access response messages are all different;

Specifically, please refer to fig. 7-10, fig. 7-10 are schematic structural diagrams of data units in a random response message according to an embodiment of the present invention. There are 4 initial downlink BWPs (initial DL BWP1, initial DL BWP2, initial DL BWP3, and initial DL BWP4), and there are 2 UEs initiating random access on the initial UL BWP, where the RAPID of the random access preamble sent by UE1 is 1 and the RAPID of the random access preamble sent by UE2 is 2. The network side device replies to MSG2 on 4 initial downstream BWPs, respectively, and the data units in these 4 MSGs 2 are shown in fig. 7, 8, 9 and 10, respectively.

The data unit 70 in the MSG2 replied by the network side device on the initial DL BWP1 includes: a response sub-protocol data unit 71 corresponding to the random access preamble transmitted by the UE1 (RAPID included in the response sub-protocol data unit 71 is 1) and a response sub-protocol data unit 72 corresponding to the random access preamble transmitted by the UE2 (RAPID included in the response sub-protocol data unit 72 is 2).

The data unit 80 in the MSG2 replied by the network side device on the initial DL BWP2 includes: a response sub-protocol data unit 81 corresponding to the random access preamble transmitted by the UE1 and a response sub-protocol data unit 82 corresponding to the random access preamble transmitted by the UE 2.

The data unit 90 in the MSG2 replied by the network side device on the initial DL BWP3 includes: a response sub-protocol data unit 91 corresponding to the random access preamble transmitted by the UE1 and a response sub-protocol data unit 92 corresponding to the random access preamble transmitted by the UE 2.

The data unit 100 in the MSG2 replied by the network side device on the initial DL BWP4 includes: a response sub-protocol data unit 101 corresponding to the random access preamble transmitted by the UE1 and a response sub-protocol data unit 102 corresponding to the random access preamble transmitted by the UE 2.

Wherein, in the response

subprotocol data units

71, 81, 91, 101, the uplink grant resources (i.e. ULgrant time-frequency resources) for sending the MSG3 are all different; the response

sub-protocol data units

72, 82, 92, 102 all have different uplink grant resources for transmitting the MSG 3.

If the UE1 receives the 4 MSGs 2, it may select one MSG2 from the 4 MSGs 2, for example, select the MSG2 that the network side device replies on initial DL BWP1, and obtain the uplink grant resource for sending MSG3 in the response sub-protocol data unit 71 from the selected MSG 2.

If the UE2 receives the 4 MSGs 2, it may select one MSG2 from the 4 MSGs 2, for example, select the MSG2 that the network side device replies on initial DL BWP3, and obtain the uplink grant resource for sending MSG3 in the response sub-protocol data unit 92 from the selected MSG 2.

In some preferred embodiments of the present invention, the response sub-protocol data unit includes: parameter information for transmitting MSG 3;

the step of sending the MSG3 on the acquired uplink grant resource includes:

In further preferred embodiments of the present invention, the random access request comprises a random access preamble;

Still taking fig. 7 as an example, if there are 3 UEs initiating random access on the initial UL BWP, the random access preambles transmitted by the UE1 and the UE2 are the same, the RAPID of the random access preamble transmitted by the UE1 and the UE2 is 1, the random access preamble transmitted by the UE3 is different from the random access preamble transmitted by the UE1 and the UE2, and the RAPID of the random access preamble transmitted by the UE3 is 2. The number of the random access preamble codes received by the network side device is 2, and one random access response message includes 2 response sub-protocol data units, each response sub-protocol data unit corresponds to one random access preamble code, that is, the response sub-protocol data unit 71 corresponds to the random access preamble codes sent by the UE1 and the UE2, and the response sub-protocol data unit 72 corresponds to the random access preamble code sent by the UE 3.

Based on the same inventive concept as the embodiment of the invention, the invention also provides a random access method. Referring to fig. 11, fig. 11 is a flowchart illustrating a random access method according to a fourth embodiment of the present invention, where the method is applied to a network side device, and includes the following steps:

step 111: receiving a random access request sent by a terminal;

step 112: respectively sending random access response messages to the terminal on the configured M initial downlink BWPs, wherein each random access response message corresponds to one initial downlink BWP, and the random access response messages include: the uplink grant resource is used for sending MSG3, and M is a positive integer greater than or equal to 2;

step 113: decoding the MSG3 sent by the terminal.

In the random access method provided in the embodiment of the present invention, a network side device receives a random access request sent by a terminal, and sends a random access response message at M initial downlink BWPs, where the random access response message includes: the uplink grant resource used for sending the MSG3 enables the terminal to send the MSG3 on the corresponding uplink grant resource, and can scatter the UEs at the initial access, thereby supporting multiple UEs to perform network access simultaneously, and meeting the expectation of 5G for large-scale connection.

Preferably, the random access request includes a random access preamble;

Preferably, the response subprotocol data unit includes: for transmitting parameter information of MSG 3.

each of the random access response messages includes: p response sub-protocol data units, each response sub-protocol data unit corresponding to a random access preamble, the response sub-protocol data unit comprising: a corresponding random access preamble and an uplink grant resource for transmitting MSG 3.

The specific working process of the fourth embodiment of the present invention corresponds to the three phases of the corresponding embodiments, and therefore, the detailed description thereof is omitted, and please refer to the description of the corresponding embodiments.

Based on the same inventive concept as the first embodiment of the invention, the invention also provides a terminal. Referring to fig. 12, fig. 12 is a schematic structural diagram of a terminal 120 according to a fifth embodiment of the present invention, where the terminal 120 includes:

a processor 121, configured to determine an initial upstream bandwidth portion BWP as a first upstream BWP from N initial upstream BWPs, where N is a positive integer greater than or equal to 2;

a transceiver 122 for transmitting a random access request at the first upstream BWP; receiving a random access response message sent by network side equipment;

the processor 121 is configured to acquire an uplink grant resource corresponding to the first uplink BWP from the random access response message;

the transceiver 122 is configured to send the MSG3 on the acquired uplink grant resource.

The terminal provided by the embodiment of the invention initiates random access on the first uplink BWP, acquires the corresponding uplink authorized resource from the random access response message replied by the network side equipment, and sends the MSG3 on the corresponding uplink authorized resource, so that the UE can be scattered during initial access, thereby supporting the simultaneous network access of a plurality of UEs and meeting the expectation of 5G on large-scale connection.

Preferably, the random access response message further includes a corresponding relationship between the RA-RNTI and the index number of the first uplink BWP;

the processor 121 is configured to obtain the RA-RNTI according to a corresponding relationship between the RA-RNTI and the index number; and decoding the random access response message according to the RA-RNTI to acquire an uplink authorized resource corresponding to the first uplink BWP.

Preferably, the random access request includes a random access preamble;

the processor 121 is configured to obtain a response protocol data unit corresponding to the first uplink BWP according to the index number of the first uplink BWP; searching a response sub-protocol data unit corresponding to the random access preamble in the random access request in a response protocol data unit corresponding to the first uplink BWP; and acquiring the uplink authorized resource corresponding to the first uplink BWP from the searched response sub-protocol data unit.

Preferably, the random access response message includes: parameter information for transmitting MSG 3;

the transceiver 122 is configured to send the MSG3 on the obtained uplink grant resource by using the parameter information.

Preferably, the transceiver 122 is further configured to receive configuration information sent by the network-side device, where the configuration information includes: a frequency range of the N initial upstream BWPs and an index number corresponding to each of the initial upstream BWPs.

The specific working process of the terminal according to the embodiment of the present invention is the same as that in the first corresponding embodiment, and therefore, the detailed description thereof is omitted, and please refer to the description in the first corresponding embodiment.

Based on the same inventive concept as the embodiment of the invention, the invention also provides a network side device. Referring to fig. 13, fig. 13 is a schematic structural diagram of a network-side device according to a sixth embodiment of the present invention, where the network-side device 130 includes:

a transceiver 131, configured to receive a random access request sent by a terminal at a first uplink BWP, where the first uplink BWP is an initial uplink BWP determined by the terminal from N initial uplink BWPs, and N is a positive integer greater than or equal to 2; sending a random access response message to the terminal; decoding the MSG3 sent by the terminal in a search space corresponding to the first upstream BWP.

In the network-side device provided by the embodiment of the present invention, the receiving terminal initiates random access on the first uplink BWP, replies with a random access response message, so that the terminal obtains a corresponding uplink grant resource from the random access response message, and sends MSG3 on the corresponding uplink grant resource, which can break up UE during initial access, thereby supporting multiple UEs to perform network access simultaneously, and meeting the expectation of 5G for large-scale connection.

Preferably, the transceiver 131 is configured to receive random access requests sent by a plurality of terminals in N initial uplink BWPs, where each random access request includes a random access preamble, N is a positive integer greater than or equal to 2 and less than or equal to N;

Preferably, the transceiver 131 is further configured to send configuration information to the terminal, where the configuration information includes: a frequency range of the N initial upstream BWPs and an index number corresponding to each of the initial upstream BWPs.

The specific working process of the network side device in the embodiment of the present invention is the same as that in the second corresponding embodiment, and therefore, the detailed description is not repeated here, and please refer to the description of the method steps in the second corresponding embodiment.

Based on the same inventive concept as the embodiment of the invention, the invention also provides a terminal. Referring to fig. 14, fig. 14 is a schematic structural diagram of a terminal according to a seventh embodiment of the present invention, where the terminal 140 includes:

a transceiver 141, configured to send a random access request to a network side device; receiving a random access response message sent by the network-side device at least one initial downlink BWP, where the random access response message includes: an uplink grant resource configured to send MSG3, where each random access response message corresponds to one initial downlink BWP, where the at least one initial downlink BWP is at least one initial downlink BWP of M initial downlink BWPs configured by the network-side device, and M is a positive integer greater than or equal to 2;

the processor 142 is configured to select one random access response message, and acquire an uplink grant resource used for sending the MSG3 in the selected random access response message;

the transceiver 141 is configured to send the MSG3 on the acquired uplink grant resource.

The terminal provided by the embodiment of the invention initiates random access on the first uplink BWP, receives the random access response message which is replied by the network side equipment and contains the uplink authorized resource used for sending the MSG3, so that the terminal sends the MSG3 on the corresponding uplink authorized resource, and can scatter the UE when initially accessing, thereby supporting a plurality of UEs to simultaneously carry out network access and conforming to the expectation of 5G on large-scale connection.

Preferably, the random access request includes a random access preamble;

the processor 142 is configured to acquire, from the selected random access response message, a response subprotocol data unit corresponding to the random access preamble sent by the terminal, and is configured to send an uplink grant resource of the MSG 3.

Preferably, the response subprotocol data unit includes: parameter information for transmitting MSG 3;

the transceiver 141 is configured to send the MSG3 on the obtained uplink grant resource by using the parameter information.

Preferably, the random access request includes a random access preamble;

The specific working process of the terminal according to the embodiment of the present invention is the same as that in the third corresponding embodiment, and therefore, the detailed description is omitted here, and please refer to the description of the method steps in the third corresponding embodiment.

Based on the same inventive concept as the fourth embodiment of the present invention, the present invention further provides a network side device. Referring to fig. 15, fig. 15 is a schematic structural diagram of a network-side device according to an eighth embodiment of the present invention, where the network-side device 150 includes:

a transceiver 151 for receiving a random access request transmitted by a terminal; respectively sending random access response messages to the terminal on the configured M initial downlink BWPs, wherein each random access response message corresponds to one initial downlink BWP, and the random access response messages include: the uplink grant resource is used for sending MSG3, and M is a positive integer greater than or equal to 2; decoding the MSG3 sent by the terminal.

The network side device provided in the embodiment of the present invention receives a random access request sent by a terminal, and sends a random access response message at M initial downlink BWPs, where the random access response message includes: the uplink grant resource used for sending the MSG3 enables the terminal to send the MSG3 on the corresponding uplink grant resource, and can scatter the UEs at the initial access, thereby supporting multiple UEs to perform network access simultaneously, and meeting the expectation of 5G for large-scale connection.

Preferably, the random access request includes a random access preamble;

the transceiver 151 is configured to send a random access response message to the terminal on each initial downlink BWP;

Preferably, the transceiver 151 is configured to receive random access requests sent by multiple terminals, where each random access request includes a random access preamble, and the number of the received random access preambles is P, where P is a positive integer greater than or equal to 1;

The specific working process of the network side device according to the embodiment of the present invention is the same as that in the fourth corresponding embodiment, and therefore, the detailed description is omitted here, and please refer to the description of the method steps in the corresponding embodiment.

Based on the same inventive concept as the first embodiment of the invention, the invention also provides a terminal. Referring to fig. 16, fig. 16 is a schematic structural diagram of a terminal according to a ninth embodiment of the present invention, where the terminal 160 includes a processor 161, a memory 162, and a computer program stored in the memory 162 and capable of running on the processor 161; the processor 161, when executing the computer program, implements the steps of:

sending a random access request at the first upstream BWP;

receiving a random access response message sent by network side equipment;

and transmitting the MSG3 on the acquired uplink authorized resource.

the processor 161, when executing the computer program, implements the steps of:

Preferably, the random access request includes a random access preamble;

the step of sending the MSG3 on the acquired uplink grant resource includes:

Preferably, the processor 161, when executing the computer program, implements the following steps:

before the step of determining an initial upstream BWP as a first upstream BWP from the N initial upstream bandwidth portions BWP, the method further includes:

The specific working process of the terminal according to the embodiment of the present invention is the same as that in the first corresponding embodiment, and therefore, the detailed description is omitted here, and please refer to the description of the method steps in the first corresponding embodiment.

Based on the same inventive concept as the embodiment of the invention, the invention also provides a network side device. Referring to fig. 17, fig. 17 is a schematic structural diagram of a network-side device according to a tenth embodiment of the present invention, where the network-side device 170 includes a processor 171, a memory 172, and a computer program stored in the memory 172 and capable of running on the processor 171; the processor 171, when executing the computer program, implements the steps of:

sending a random access response message to the terminal;

The network side device of the embodiment of the invention receives the random access request sent by the terminal on the first uplink BWP, replies with the random access response message, enables the terminal to obtain the corresponding uplink authorized resource in the random access response message, and sends the MSG3 on the corresponding uplink authorized resource, can break up the UE during initial access, thereby supporting a plurality of UEs to simultaneously carry out network access, and conforming to the expectation of 5G on large-scale connection.

the step of receiving the random access request sent by the terminal at the first uplink BWP includes:

before the step of the random access request sent by the first uplink BWP, the receiving terminal further includes:

The specific working process of the network side device in the embodiment of the present invention is the same as that in the second corresponding embodiment, and therefore, detailed description is not repeated here, and please refer to the description of the method steps in the second corresponding embodiment.

Based on the same inventive concept as the embodiment of the invention, the invention also provides a terminal. Referring to fig. 18, fig. 18 is a schematic structural diagram of a terminal 180 according to an eleventh embodiment of the present invention, where the terminal 180 includes a processor 181, a memory 182, and a computer program stored in the memory 182 and operable on the processor 181; the processor 181, when executing the computer program, implements the following steps:

sending a random access request to network side equipment;

and sending the MSG3 on the acquired uplink authorized resource.

The terminal of the embodiment of the present invention initiates random access to the network side device, and receives a random access response message sent by the network side device at least one initial downlink BWP, where the random access response message includes: the uplink grant resource used for sending the MSG3 enables the terminal to send the MSG3 on the corresponding uplink grant resource, and can scatter the UEs at the initial access, thereby supporting multiple UEs to perform network access simultaneously, and meeting the expectation of 5G for large-scale connection.

Preferably, the random access request includes a random access preamble;

the processor 181, when executing the computer program, implements the following steps:

the step of sending the MSG3 on the acquired uplink grant resource includes:

Preferably, the random access request includes a random access preamble;

Based on the same inventive concept as the fourth embodiment of the present invention, the present invention further provides a network side device. Referring to fig. 19, fig. 19 is a schematic structural diagram of a network-side device 190 according to a twelfth embodiment of the present invention, where the network-side device 190 includes a processor 191, a memory 192, and a computer program stored in the memory 192 and capable of running on the processor 191; the processor 191, when executing the computer program, performs the steps of:

receiving a random access request sent by a terminal;

decoding the MSG3 sent by the terminal.

Preferably, the random access request includes a random access preamble;

the processor 191, when executing the computer program, performs the steps of:

Preferably, the processor 191, when executing the computer program, implements the following steps:

the step of receiving the random access request sent by the terminal comprises:

The specific working process of the network side device in the embodiment of the present invention is the same as that in the fourth corresponding embodiment, and therefore, detailed description is not repeated here, and please refer to the description of the method steps in the corresponding embodiment.

A thirteenth embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in any of the random access methods in the first embodiment, the second embodiment, the third embodiment, and the fourth embodiment. The specific working process is the same as that in the first, second, third and fourth embodiments, and thus, detailed description is omitted here, and please refer to the description of the method steps in the corresponding embodiments.

The network side device in the embodiment of the present invention may be a Base Transceiver Station (BTS) in Global System for mobile communication (GSM) or Code Division Multiple Access (CDMA), may also be a Base Station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), may also be an evolved Node B (evolved Node B, eNB or eNodeB) in LTE, or a relay Station or Access point, or a Base Station in a future 5G network, and the like, which is not limited herein.

The terminal in the embodiments of the present invention may be a wireless terminal or a wired terminal, and the wireless terminal may be a device providing voice and/or other service data connectivity to a user, a handheld device having a wireless connection function, or other processing devices connected to a wireless modem. A wireless terminal, which may be a mobile terminal such as a mobile telephone (or "cellular" telephone) and a computer having a mobile terminal, e.g., a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, may communicate with one or more core networks via a Radio Access Network (RAN), and may exchange language and/or data with the RAN. For example, devices such as Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs) are used. A wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), and a Terminal (User device or User Equipment), which are not limited herein.

Such computer-readable media, which include both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A random access method applied to a terminal is characterized by comprising the following steps:

sending a random access request at the first upstream BWP;

receiving a random access response message sent by network side equipment;

and transmitting the MSG3 on the acquired uplink authorized resource.

2. The random access method of claim 1,

the random access response message also comprises a corresponding relation between a random access radio network temporary identifier RA-RNTI and the index number of the first uplink BWP;

3. The random access method of claim 1,

the random access request comprises a random access preamble;

4. The random access method of claim 3, wherein the response subprotocol data units corresponding to the same random access preamble code have different uplink grant resources for transmitting MSG 3.

5. The random access method according to claim 1, wherein before the step of determining an initial upstream BWP from the N initial upstream bandwidth portions BWP as the first upstream BWP, the method further comprises:

6. A random access method is applied to network side equipment, and is characterized by comprising the following steps:

sending a random access response message to the terminal;

7. The random access method according to claim 6, wherein the random access response message further includes a corresponding relationship between a random access radio network temporary identifier (RA-RNTI) and an index number of the first uplink BWP.

8. The random access method of claim 6,

9. The random access method of claim 8, wherein the response subprotocol data units corresponding to the same random access preamble code have different uplink grant resources for transmitting MSG 3.

10. The random access method according to claim 6, wherein the receiving terminal further comprises, before the step of sending the random access request by the first uplink BWP:

11. A random access method applied to a terminal is characterized by comprising the following steps:

sending a random access request to network side equipment;

and sending the MSG3 on the acquired uplink authorized resource.

12. The random access method of claim 11,

the random access request comprises a random access preamble;

13. The random access method of claim 11,

the random access request comprises a random access preamble;

14. A random access method is applied to network side equipment, and is characterized by comprising the following steps:

receiving a random access request sent by a terminal;

decoding the MSG3 sent by the terminal.

15. The random access method of claim 14,

the random access request comprises a random access preamble;

16. The random access method of claim 14,

the step of receiving the random access request sent by the terminal comprises:

17. A terminal, comprising:

18. A network-side device, comprising:

19. A terminal, comprising:

20. A network-side device, comprising:

21. A terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor; characterized in that the processor implements the random access method according to any of claims 1 to 5 or claims 11 to 13 when executing the computer program.

22. A network-side device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor; characterized in that the processor implements the random access method according to any of claims 6 to 10 or 14 to 16 when executing the computer program.

23. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the random access method according to any one of claims 1 to 16.