WO2018176407A1

WO2018176407A1 - Random access method, device and communications system

Info

Publication number: WO2018176407A1
Application number: PCT/CN2017/079099
Authority: WO
Inventors: 蒋琴艳; 周华
Original assignee: 富士通株式会社; 蒋琴艳; 周华
Priority date: 2017-03-31
Filing date: 2017-03-31
Publication date: 2018-10-04
Also published as: WO2018176407A9

Abstract

A random access device and a communications system, the random access device comprising: a first sending unit, the first sending unit being used for sending at least one third message according to a plurality of second messages which is returned by a network side. Thus, after a user equipment (UE) initiates a random access process to the network side, the plurality of second messages which is returned by the network side may be received so as to send a third message according to a second message, and carry out a subsequent random access process. In this way, the UE may carry out a plurality of random access attempts in parallel, which may improve the success rate of UE random access and reduce UE random access delays.

Description

Random access method, device and communication system

Technical field

The present invention relates to the field of communications, and in particular, to a random access method, apparatus, and communication system.

Background technique

In a Long Term Evolution (LTE) system, a User Equipment (UE) performs a single Random Access Process attempt at the same time, and can initiate another when it confirms that the random access procedure fails. The random access procedure attempts to access again.

The random access procedure includes a contention based random access procedure and a non-contention based random access procedure. In a contention-based random access procedure, a UE shares a random access preamble, and therefore, a random access collision may occur between UEs; and in a non-contention based random access procedure, a base station may specify a UE The preamble is randomly accessed to avoid collision with random access procedures of other UEs.

It should be noted that the above description of the technical background is only for the purpose of facilitating a clear and complete description of the technical solutions of the present invention, and is convenient for understanding by those skilled in the art. The above technical solutions are not considered to be well known to those skilled in the art simply because these aspects are set forth in the background section of the present invention.

Summary of the invention

In LTE, the communication scenario of random access is relatively simple, and the random access procedure of the UE may fail due to factors such as random access procedure conflict and insufficient transmission power. When the UE confirms that the random access procedure fails, another random access procedure may be initiated to attempt access again, such that the UE's access delay increases due to retrying access.

In future wireless communication systems, such as 5G and New Radio (NR) systems, the random access communication scenario becomes more complicated, and more uncertain factors that may cause the UE random access process to fail, such as In a multi-beam coverage scenario, the random access procedure of the UE may not be able to determine the correct receive beam or transmit beam (beam) due to factors such as the base station or the UE not supporting reciprocity, or even Failure to determine the correct target base station. Therefore, if random access is performed according to the current mechanism, the probability of failure of the UE random access procedure and the random access delay increase. However, there is currently no way to solve the above problems.

Therefore, the present invention provides a random access method, device, and communication system, which can improve the probability of random access of the UE and reduce the randomness of the UE, considering a complex communication scenario and a higher latency reliability requirement in the future wireless communication. Access delay.

According to the first aspect of the embodiment, a random access method is provided, including:

And transmitting at least one third message according to the plurality of second messages returned by the network side.

According to a second aspect of the present invention, a random access device is provided, including:

And a first sending unit, configured to send the at least one third message according to the multiple second messages returned by the network side.

According to the third aspect of the embodiment, a random access method is provided, including:

Receiving at least one third message sent by the user equipment (UE) according to the plurality of second messages returned by the network side.

According to a fourth aspect of the present invention, a random access device is provided, including:

And a second receiving unit, configured to receive at least one third message that is sent by the user equipment (UE) according to the multiple second messages returned by the network side.

According to a fifth aspect of the present invention, a communication system includes a user equipment and at least one network device on a network side;

The user equipment (UE) sends at least one third message to the network side according to multiple second messages returned by the network side;

The at least one network device on the network side receives the at least one third message.

An advantageous effect of the embodiment of the present invention is that, after the UE initiates the random access process to the network side, the device may receive multiple second messages returned by the network side, to send at least one third message according to the second message, and perform subsequent The random access procedure, in this way, the UE can parallel multiple random access attempts, thereby improving the random access success probability of the UE and reducing the random access delay of the UE.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the drawings, in which <RTIgt; It should be understood that the embodiments of the invention are not limited in scope. The embodiments of the present invention include many variations, modifications, and equivalents within the scope of the appended claims.

Features described and/or illustrated with respect to one embodiment may be used in one or more other embodiments in the same or similar manner, in combination with, or in place of, features in other embodiments. .

It should be emphasized that the term "include/comprise" as used herein refers to the presence of features, components, steps or components, The existence or addition of one or more other features, components, steps or components are not excluded.

DRAWINGS

Elements and features described in one of the figures or one embodiment of the embodiments of the invention may be combined with elements and features illustrated in one or more other figures or embodiments. In the accompanying drawings, like reference numerals refer to the

The accompanying drawings are included to provide a further understanding of the embodiments of the invention Obviously, the drawings in the following description are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings according to the drawings without any inventive labor. In the drawing:

1 is a flowchart of a random access method according to Embodiment 1 of the present invention;

2A to 2B are schematic diagrams showing a random access preamble format according to Embodiment 1 of the present invention;

3 is a schematic diagram of a correspondence between a random access preamble and a receive beam according to Embodiment 1 of the present invention;

4 is a flowchart of a random access method according to Embodiment 1 of the present invention;

5 is a flowchart of a random access method according to Embodiment 2 of the present invention;

6 is a flowchart of a random access method according to Embodiment 2 of the present invention;

7 is a flowchart of a random access method according to Embodiment 3 of the present invention;

8 is a flowchart of a random access method according to Embodiment 3 of the present invention;

9A and 9B are flowcharts of a random access method according to Embodiment 3 of the present invention;

10A and FIG. 10B are flowcharts of a random access method according to Embodiment 3 of the present invention;

11 is a flowchart of a random access method according to Embodiment 3 of the present invention;

FIG. 12 is a flowchart of a random access method according to Embodiment 3 of the present invention; FIG.

FIG. 13 is a schematic diagram of a random access apparatus according to Embodiment 4 of the present invention; FIG.

FIG. 14 is a schematic structural diagram of a user equipment according to an embodiment of the present invention; FIG.

15 is a schematic diagram of a random access device according to Embodiment 5 of the present invention;

16 is a schematic structural diagram of a network device according to an embodiment of the present invention;

17A and 17B are schematic diagrams showing the configuration of a communication system according to Embodiment 6 of the present invention;

18 is a flowchart of a random access method according to Embodiment 7 of the present invention;

19 is a schematic diagram of a random access apparatus according to Embodiment 8 of the present invention;

20 is a schematic structural diagram of a user equipment according to Embodiment 8 of the present invention;

21 is a flowchart of a random access method according to Embodiment 9 of the present invention;

Figure 22 is a schematic diagram of a random access device according to Embodiment 10 of the present invention;

23 is a schematic structural diagram of a network device according to Embodiment 10 of the present invention;

24 is a flowchart of a random access method according to Embodiment 12 of the present invention;

Figure 25 is a schematic diagram of a random access device according to Embodiment 13 of the present invention;

Figure 26 is a schematic diagram showing the structure of a user equipment according to Embodiment 13 of the present invention;

FIG. 27 is a flowchart of a random access method according to Embodiment 14 of the present invention; FIG.

28 is a schematic diagram of a random access apparatus according to Embodiment 15 of the present invention;

29 is a schematic structural diagram of a network device according to Embodiment 15 of the present invention;

30 is a flowchart of a random access method according to Embodiment 16 of the present invention;

Figure 31 is a schematic diagram of a random access device according to Embodiment 17 of the present invention;

32 is a schematic structural diagram of a network device according to Embodiment 17 of the present invention;

33 is a flowchart of a random access method according to Embodiment 18 of the present invention;

Figure 34 is a schematic diagram of a random access device according to Embodiment 19 of the present invention;

Figure 35 is a block diagram showing the structure of a user equipment according to Embodiment 19 of the present invention;

detailed description

The foregoing and other features of the present invention will be apparent from the The specific embodiments of the present invention are disclosed in the specification and the drawings, which are illustrated in the embodiment of the invention The invention includes all modifications, variations and equivalents falling within the scope of the appended claims. Various embodiments of the present invention will be described below with reference to the accompanying drawings. These embodiments are merely exemplary and are not limiting of the invention.

In the embodiment of the present invention, the terms "first", "second", etc. are used to distinguish different elements from the title, but do not indicate the spatial arrangement or chronological order of the elements, and these elements should not be used by these terms. Limited. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising," "comprising," "having," or "an"

In the embodiments of the present invention, the singular forms "a", "the", etc. The word "a" or "an" is not intended to mean "the" or "the" In addition, the term "subject" should be understood to mean "based at least in part", and the term "based on" should be understood to mean "based at least in part on" unless the context clearly indicates otherwise.

In the embodiment of the present invention, the term "communication network" or "wireless communication network" may refer to a network that conforms to any communication standard such as Long Term Evolution (LTE), Enhanced Long Term Evolution (LTE-A, LTE- Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed Packet Access (HSPA), and the like.

Moreover, the communication between devices in the communication system may be performed according to any phase of the communication protocol, and may include, for example but not limited to, the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, and future. 5G, New Radio (NR), etc., and/or other communication protocols currently known or to be developed in the future.

In the embodiment of the present invention, the term "network device" refers to, for example, a device in a communication system that accesses a terminal device to a communication network and provides a service for the terminal device. The network device may include, but is not limited to, a device: a base station (BS, a base station), an access point (AP, an Access Point), a transmission and reception point (TRP), a broadcast transmitter, and a mobility management entity (MME, Mobile). Management Entity), gateway, server, Radio Network Controller (RNC), Base Station Controller (BSC), and so on.

The base station may include, but is not limited to, a Node B (NodeB or NB), an evolved Node B (eNodeB or eNB), and a 5G base station (gNB), and the like, and may further include a remote radio head (RRH, Remote Radio Head), Remote Radio Unit (RRU), relay or low power node (eg femto, pico, etc.). And the term "base station" may include some or all of their functions, and each base station may provide communication coverage for a particular geographic area. The term "cell" can refer to a base station and/or its coverage area, depending on the context in which the term is used.

In the embodiment of the present invention, the term "user equipment" (UE) or "Terminal Equipment" (TE) refers to, for example, a device that accesses a communication network through a network device and receives a network service. The user equipment may be fixed or mobile, and may also be referred to as a mobile station (MS, Mobile Station), a terminal, a subscriber station (SS, Subscriber Station), an access terminal (AT, Access Terminal), a station, and the like.

The user equipment may include, but is not limited to, a cellular phone (Cellular Phone), a personal digital assistant (PDA, Personal Digital Assistant), a wireless modem, a wireless communication device, a handheld device, a machine type communication device, a laptop computer, Cordless phones, smart phones, smart watches, digital cameras, and more.

For example, in a scenario such as the Internet of Things (IoT), the user equipment may also be a machine or device that performs monitoring or measurement, and may include, but is not limited to, a Machine Type Communication (MTC) terminal, In-vehicle communication terminal, device to device (D2D, Device to Device) terminal, machine to machine (M2M, Machine to Machine) terminal, and the like.

In this embodiment, the random access procedure may be a contention based random access procedure or a non-contention based random access procedure. The random access procedure is classified into a contention-based random access procedure and a non-contention-based random access procedure according to whether the network device can uniquely identify a random access procedure of a certain UE.

The embodiments of the present invention will be described below with reference to the accompanying drawings.

Example 1

Embodiment 1 of the present invention provides a random access method, which is applied to a device side that initiates a random access procedure to a network side, such as a user equipment side.

1 is a flowchart of a random access method according to Embodiment 1 of the present invention. As shown in Figure 1, it includes:

Step 101: The user equipment (UE) sends at least one third message according to multiple second messages returned by the network side.

According to the foregoing embodiment, after the UE initiates a random access procedure to the network side, the UE may receive multiple second messages (such as more than one second message) returned by the network side, so that the UE according to the second message. The at least one third message is sent to perform a subsequent random access procedure, so that the UE can perform multiple random access attempts in parallel, thereby improving the random access success probability of the UE and reducing the random access delay of the UE.

In this embodiment, before step 101, the method may further include the step 100 of receiving a plurality of second messages returned by the network side. For example, a plurality of second messages returned by one network device on the network side may be received, or one or more second messages returned by each of the plurality of network devices on the network side may be received, so that the UE may be concurrently multiple. The random access attempt improves the random access probability of the UE and reduces the random access delay of the UE.

In this embodiment, the second message (Msg. 2) may be a random access response (RAR, Radom Access). Response) messages can come from the same network device or from multiple different network devices.

In this embodiment, each second message includes at least one of the following information:

Time calibration/advance information (TA, Timing Alignment/Advance), UE identity in the cell, first message resource indication information, random access preamble indication information, uplink resource scheduling information of the third message (Msg.3), fallback The indication information, the reception quality indication information of the first message (Msg. 1), the network device indication information, the synchronization signal block (SS block), and/or the transmit beam (Tx beam) indication information.

In this embodiment, the time alignment/advance information (TA) is similar to the existing mechanism, and is not described here;

In this embodiment, in the contention-based random access, the UE identifier in the cell is a temporary identifier of the UE in the target cell, for example, a Temporary Cell Radio Network Temporary Identifier (TC-RNTI) In the non-contention based random access, the UE identifier in the cell is a temporary identifier of the UE in the target cell, such as a TC-RNTI, or a fixed identifier of the UE in the target cell, for example, a temporary identifier of the cell wireless network ( Cell Radio Network Temporary Identifier, C-RNTI);

The first message resource indication information may be a random access resource (such as RACH Resource) indication information, such as location information of the occupied time-frequency resource, or the temporary access wireless network temporary identifier calculated according to the first message resource location. (RA-RNTI, Rado Access Radio Network Temporary Identifier), etc., not listed here;

The random access preamble indication information may be a random access preamble index (Preamble index/indices).

In this embodiment, the network device indication information may be a device identifier of a network device such as a gNB or a TRP. The indication may be directly performed. For example, the indication information may be a cell identifier (Cell-ID), and the indication information may be directly included in the second message. In addition, the indication may be indirectly indicated, that is, an implicit indication. For example, the SS block indication information, the transmit beam (Tx beam) indication information, the first message resource indication information, the random access preamble, and the like, indirectly indicating the network device;

In this embodiment, the SS block may be used to support cell synchronization, measurement, information broadcast, etc., for example, the SS block may be composed of a synchronization signal, and/or a broadcast channel, and/or a reference signal; for example, the synchronization signal may It is a primary synchronization signal (PSS, Primary Synchronization Signal/NR-PSS), and/or a secondary synchronization signal (SSS, Secondary Synchronization Signal/NR-PSS), etc., and the broadcast channel may be a physical broadcast channel (PBCH, Physical Broadcast CHannel/ NR-PBCH).

In this embodiment, the foregoing network device indication information, and/or SS block, and/or transmit beam (Tx beam) indication information may be included in the second message to explicitly indicate the network device, the SS block, and/or Or send waves Tx beam, for example, including the above information in the message content of the second message, or including the information in the control channel/control signaling/control information (such as the physical downlink control channel PDCCH) carrying the second message. , the downlink control information DCI) is explicitly indicated.

In this embodiment, the indication information may not be included in the second message, but is indicated by other means, that is, implicitly indicating the network device, the SS block, and/or the transmit beam (Tx beam). The following examples are given, but the embodiment is not limited to the following examples.

For example, pre-configuring the first mapping relationship between the foregoing information and the first message resource (such as the RACH resource), and/or the random access preamble, where the second message carries the first message resource indication information and/or random connection When the preamble is received, the network device corresponding to the second message, and/or the SS block and/or the transmit beam may be indicated according to the indication information that is carried, the first mapping relationship;

For example, pre-configuring a second mapping relationship between the resource occupied by the second message and the first message resource and/or the random access preamble, and the resource and network device occupied by the second message, and/or the SS block, and/or the transmit beam a third mapping relationship, for example, different network devices, and/or SS blocks, and/or transmit beams are mapped to different first message resources and/or random access preambles, and the UE first occupies according to the first message sent The time-frequency resource and/or the random access preamble, and the second mapping relationship determine the time-frequency resource occupied by the second message, and then determine the second message according to the third mapping relationship and the determined time-frequency resource occupied by the second message. Corresponding network device, and/or SS block, and/or transmit beam

For example, the foregoing information and the scrambling sequence, or the identifier used for the scrambling sequence calculation, such as the fourth mapping relationship of the Radio Access Radio Network Temporary Identifier (RA-RNTI), are configured in advance on the network side. The second message may be scrambled using the calculated or selected scrambling sequence, or the scrambling sequence may be first calculated using the calculated or selected RA-RNTI, and then the second message is scrambled using the scrambling sequence, where After the UE listens to the second message, the scrambling sequence may be obtained or an identifier of the scrambling sequence, such as an RA-RNTI, may be obtained, so that the identifier of the scrambling sequence is calculated according to the obtained scrambling sequence, and the identifier The four mapping relationship may determine a network device, and/or an SS block, and/or a transmit beam corresponding to the second message. However, the embodiment is not limited thereto, and will not be enumerated here.

In this embodiment, for implicitly indicating the network device, and/or the SSblock, and/or the transmit beam, the UE may receive the first mapping relationship and/or the second mapping relationship configured by the network side, and/or Or a third mapping relationship, and/or a fourth mapping relationship. In this embodiment, when the mapping relationship is configured on the network side, the network side may perform broadcast channel/signal/signaling, and/or other semi-static or dynamic broadcast messages, and/or RRC signaling, and/or The UE is informed by physical layer dynamic signaling, and/or pre-defined/pre-configured. For example, the broadcast channel/signal/signaling includes SS block, PBCH, NR-PBCH, PSS, SSS, NR-PSS, NR-SSS, reference signal, etc., and the other semi-static or dynamic broadcast messages include system messages, such as the main MIB (Master Information Block), NR-MIB, System Information Block (SIB), NR-SIB, etc.; the physical layer dynamic signaling may include a physical layer control channel, such as a physical downlink control channel (PDCCH). (Physical Downlink Control CHannel), evolved physical information control channel (EPDCCH, Evolved PDCCH), NR-PDCCH, and the like.

In addition, the uplink resource scheduling information, the backoff indication information, and the reception quality indication information of the first message (Msg.1) of the third message (Msg. 3) in the second message are similar to the prior art, and are not Let me repeat.

In this embodiment, when receiving a plurality of second messages returned by the network side in step 100, the method may further include a step (not shown), selecting at least one second message from the returned plurality of second messages. And in step 101, transmitting at least one third message according to the selected plurality of second messages.

In this embodiment, when the at least one second message is selected, the UE may randomly select at least one second message from the plurality of second messages; or according to at least one information in the second message. And/or the second message receiving quality and/or the received number selecting at least one second message.

For example, the UE directly selects all received second messages, or randomly selects one or a part of the second messages; or, when the UE selects at least one second message according to the reception quality of the first message in the second message, The UE does not select a second message whose reception quality of the first message is higher than a reception quality threshold (eg, TH1) of the predetermined first message; or, when the at least one second message is selected according to the UE identifier in the cell, the UE Selecting a second message having the same UE identity in the cell; or, when the UE selects the at least one second message according to the second message receiving quality and/or the received quantity, the UE selects the second message to receive the quality higher than the predetermined one. The second message of the second message is received by the quality threshold (such as TH2); if the UE receives only one second message, the second message is directly selected without considering any restrictions.

In this embodiment, in step 101, at least one third message (Msg.3) may be sent according to the information included in the selected at least one second message, where the third message is based on the received second message. The message sent by the UE's random access. For example, each second message in the selected at least one second message indicates that the network side transmits one Msg.3 allocated uplink resource for the UE side (as indicated by the third message in the second message (Msg.3) When the uplink resource scheduling information is indicated, the UE separately scrambles the Msg.3 corresponding to the second message by using the UE identifier in the cell included in each selected second message, and the third message after scrambling is The network side sends.

In this embodiment, each third message in the at least one third message may include at least one of the following information: a UE identifier, a received quality of the corresponding second message, and a cell in the cell after accessing the target cell. The UE identifier and the third message sending quantity indication information. The receiving quality of the corresponding second message is the receiving quality corresponding to the second message according to the second message. However, the third message is not limited to the foregoing information, and other information may be included as needed, and is not enumerated here.

For example, when the UE selects a second message, the third message may include: the UE identifier. If the UE is in the RRC_IDLE state, the UE identifier may be a random number or a UE core network identifier; if the UE is in the RRC_CONNECTED state, the UE identifier It may be a random number, a UE core network identifier, or a unique identifier of the UE in the target cell, such as a pre-allocated C-RNTI;

When the UE selects multiple second messages, each third message may include: a UE identifier and a reception quality of a second message corresponding to the selected second message; wherein the UE identifier is as described above, and is no longer Narrative

In this embodiment, the UE identifier in the cell after accessing the target cell may be determined by the UE side, and when determined by the UE side, the UE identifier in the cell after the access target cell may be displayed in the first Three messages. In this case, the method may further include a step (not shown) that determines the UE identity within the cell after accessing the target cell. The UE may be determined according to the indication information of the UE identity in the cell after the access to the target cell is determined by the UE side or by the network side configured on the network side.

When the indication information configured on the network side is determined by the UE side, the UE determines the UE identifier in the cell after accessing the target cell according to the configuration. In this way, the method may further include the step of: receiving, by the network side, indication information indicating, by the UE side, the UE identity in the cell after the access target cell.

For example, when the UE selects multiple second messages, the UE may select one of the UE identifiers in the multiple cells included in the received multiple second messages, and determine the selected UE identity in the cell as The UE identifier in the cell after accessing the target cell is used as the content of the third message. For example, when the selected multiple second messages are from the same network device or can exchange information between different network devices (for example, ideal-backhaul, low latency/no delay interaction information), the UE can simultaneously select The UE identifier in the cell determines the UE identifier in the selected cell as the UE identifier in the cell after accessing the target cell, and serves as the content of the third message.

In this embodiment, when the UE determines the UE identity in the cell after accessing the target cell, when the UE selects a second message, the UE identifier in the cell after the access target cell may not be included in the UE. The content of the third message is indicated by an implicit manner, such as included in the scrambling of the third message, that is, the determination is utilized The UE identifier in the cell after accessing the target cell scrambles the third message, thereby reducing signaling overhead.

In addition, in the above example, the third message may further include a third message sending quantity indication information, for example, directly indicating the number (number/number) of sending the third message, or indicating whether the third message is sent by the UE. The last third message.

In this embodiment, when the UE side is not sure of the UE identity in the cell after accessing the target cell, the third message does not include the information, that is, the UE identifier in the cell after accessing the target cell, and thus, The method may further include the step of: receiving, by the network side, indication information indicating that the UE identity in the cell after the access target cell is determined by the network side. When the network side determines the identity in the cell after accessing the target cell, for example, the network side may randomly or according to at least one information in the third message, and/or according to the receiving quality/reception quantity of the third message on the network side. The UE identity in the cell after accessing the target cell is determined.

In this embodiment, the foregoing indication information configured by the network side may be through broadcast channel/signal/signaling, and/or other semi-static or dynamic broadcast messages, and/or RRC signaling, and/or physical layer dynamic signaling, The UE is informed and/or predefined/preconfigured.

In this embodiment, before step 100, the method may further include a step (not shown): the UE sends at least one first message (Msg.1) to the network side. Through this step, the UE initiates a random access procedure, which may be a contention-based random access procedure or a non-contention-based random access procedure, where the first message may be used to initiate a random access procedure. The message of the access procedure may be a signal/information as shown in FIG. 2A or 2B, which may be sent to one or more network devices.

In an embodiment, for the contention-based random access procedure, the user equipment selects resources in the preamble and random access time-frequency resource set in the random access preamble set to send the first message.

In another embodiment, for a non-contention based random access procedure, the network device may allocate a dedicated Random Access Preamble Sequence to the UE, and/or a dedicated random access time-frequency resource (eg, random) The RACH Resource, and/or the Random Access Preamble Format, etc., uniquely identify the random access procedure, such as by signaling, such as Radio Resource Control (RRC). Signaling and/or physical layer dynamic control signaling, etc. are configured to avoid collision with random access procedures of other UEs. In this case, when the UE sends the first message, pre-configured dedicated random access is used. The preamble and dedicated random access time-frequency resources are used to send the first message.

In this embodiment, the method may further include a step (not shown): determining the number of the first message to be sent ( Number/number of transmissions), or the number of transmissions of the first message (number of times/number of transmissions) indicated by the network side.

And after determining to send the number of the first message, the method may further include: determining a resource for transmitting the first message.

In an embodiment, the number of the first message sent by the UE (the number of times/the number of times of transmission) is determined by the UE side according to the indication information configured by the network side and/or the UE side condition; wherein the indication information of the network side configuration may be The method includes: at least one of the following information: random access resource configuration information, random access preamble configuration information, random access trigger indication information, a maximum transmission number of the first message (Msg.1) transmitted by the UE, and multiple first messages ( Msg.1) trigger condition for transmission, delay requirement or priority configuration, etc., but not limited to the above information; the UE side condition may include at least one of the following conditions: UE capability, UE type, UE priority, downlink measurement result , random access trigger events, etc., but not limited to the above information.

The determination of the quantity and the resources will be described below by way of specific examples, but is not limited to the following embodiments.

Example 1: According to the network side random access resource (such as RACH resource) configuration information, and/or the random access preamble configuration information and the downlink measurement result of the UE side are determined:

The indication information configured on the network side indicates that different SS blocks are associated with different RACH resources and/or random access preambles, and when the UE detects multiple SS block/Tx beams, it may be determined that multiple Msg.1 are sent;

When the UE detects multiple SS block/Tx beams, the UE may select at least one SS block/Tx beam, and then send at least one of the RACH resource and/or the random access preamble associated with the at least one SS block/Tx beam. A message. In this case, the network side may also assist the UE to select the SS block/Tx beam through the configuration information, and then send at least one first message according to the RACH resource and/or the random access preamble associated with the selected SS block/Tx beam. For example, the network side configures the reception quality threshold of the SS block/Tx beam, the UE does not select the SS block/Tx beam corresponding to the reception quality threshold; or the reception quality difference threshold of the SS block/Tx beam selected by the network side configuration, The UE may select multiple SS block/Tx beams whose received quality difference between the received SS block/Tx beam does not exceed the upper limit. For example, the SS block/Tx beam with high reception quality may be selected first, and then based on the reception quality. The reception quality of the high SS block/Tx beam is compared with the reception quality of the other SS block/Tx beam, and finally the SS block/Tx beam whose difference does not exceed the upper limit is selected.

Example 2: Determined based on UE capabilities:

For a UE supporting a UE that does not have full reciprocity, multiple Msg.1s are transmitted. For a UE that fully supports reciprocity, it is possible to determine its own appropriate transmit beam (Tx beam) and appropriate receive wave. A UE of a bundle (Rx beam) correspondence (Tx/Rx beam correspondence) transmits a first message using a certain transmit beam determined according to a receive beam; a UE that does not fully or does not have the reciprocity described above may use more A plurality of different transmit beams transmit a plurality of first messages.

Example 3: Determine according to network side delay requirements or priority configuration and UE priority and/or downlink measurement results:

The indication information configured on the network side indicates that the UE that is higher than the predetermined delay requirement or priority transmits multiple Msg.1, such that the delay requirement and/or the priority is lower than or equal to the predetermined delay requirement and/or the UE priority. The UE sends a first message; the UE with the delay requirement and/or the priority higher than the predetermined delay requirement and/or the UE priority sends a plurality of first messages to the network side.

In another embodiment, the number (number/number of transmissions) of the first message sent by the UE is determined by the network side according to the network status and/or the UE side condition, and the determined number of transmissions is sent to the UE side; the network The status includes the load and the like. The UE side conditions are as described in the foregoing embodiment, and are not described here. The network side may directly pass control signaling or information, such as RRC (Radio Resource Control) signaling and/or physics. The layer dynamic control signaling (such as DCI) indicates the number (number/number of transmissions) of the first message sent by the UE.

In this embodiment, the UE may send the first message by using a random access preamble format, where the random access preamble format is composed of at least one random access preamble (Preamble), and each random access preamble (Random Access) Preamble) includes a random access preamble sequence (SEQ) and its cyclic prefix (CP, Cyclic Prefix); each preamble sequence (SEQ) includes at least one random access channel (RACH) OFDM symbol.

In this embodiment, the random access preamble format may include two types: a single preamble (Single Preamble) and a multiple/repeated preamble (Multiple/Repeated Preamble), and the following are for convenience of description. / Repeated preamble is called a non-single preamble.

2A and 2B are respectively schematic diagrams of a random access preamble format according to Embodiment 1 of the present invention. As shown in FIG. 2A, the random access preamble format is a single preamble, which is composed of a cyclic prefix (CP, Cyclic Prefix) and a preamble sequence (SEQ), and the preamble sequence includes one random access channel orthogonal frequency division multiplexing ( RACH OFDM, Rado Access Channel Orthogonal Frequency Division Multiplexing) symbol; as shown in FIG. 2B, the random access preamble format is a non-single preamble, and each random access preamble includes a CP and a SEQ, such as including N random access preambles, each The preamble sequence includes M RACH OFDM symbols, where N is an integer greater than or equal to 1; if N is equal to 1, M is an integer greater than 1; if N is greater than 1, M is an integer greater than or equal to 1; different random The preamble sequence (SEQ) included in the access preamble may be the same or different; or the RACH OFDM symbol sequence included in the same random access preamble sequence may be the same or different.

The formats shown in FIG. 2A and FIG. 2B are examples, and the embodiment is not limited to the above format.

For example, the random access preamble format may further include a guard interval (GT). In this embodiment, the location and number of the GT are not limited. For example, the GT is a guard interval after at least one random access preamble, such as After any random access preamble, such as after the last random access preamble, or after each random access preamble of multiple random access preambles; in addition, the GT may also be a guard interval of the entire random access format. As shown by the dashed boxes in FIGS. 2A and 2B, they are not enumerated here.

In this embodiment, when one or both of the following situations exist, the network side, such as one or more network devices (more than one network device), may return multiple second messages to the UE, and the UE may A plurality of second messages returned by the network side (one or more network devices) are received, but the embodiment is not limited to the following cases, and is not enumerated here:

First, the UE sends a plurality of first messages to a network device, such that the network device can return a plurality of second messages based on the received first message.

Second, the UE may send a first message (Msg.1) to a network device, where the UE sends the first message (Msg.1) in a random access preamble format, as shown in FIG. 2B. The Multiple/Repeated Radom Access Preamble Famat (MAT) is transmitted to transmit the Msg.1, so that the Msg.1 includes multiple Preamble Sequences (SEQ) and/or RACH OFDM symbols, and the network device can Different preamble sequences (SEQ) and/or RACH OFDM symbols are received using different receive beams (Rx beams), as shown in FIG. 3, and a plurality of second messages are returned.

Third, the UE sends a first message to a plurality of network devices that can exchange information, such that each of the plurality of network devices can respectively return a second message based on the received first message.

Fourth, the UE sends multiple first messages to multiple network devices that can exchange information, such that each of the multiple network devices returns multiple seconds based on the received multiple first messages. Message.

The fifth type, the UE sends the at least one first message on the configured resource (such as the RACH resource), and the multiple network devices are configured with the resource, so that the multiple network devices can receive the first message, and A plurality of second messages are returned based on the first message.

Sixth, the UE sends a first message to a network device, and the network device can return a plurality of second messages for the first message. For example, the network device returns multiple second messages in order to improve the success rate of receiving the second message by the UE.

In this embodiment, in the first, third, and sixth cases described above, the first message of the first message is sent. The method is not limited; in addition, as described in the second or sixth case, when the UE sends the first message to a single network device, the network device may also return multiple second messages for a first message from the UE. In addition, the above several cases are specific examples of receiving a plurality of second messages from the network side, but the embodiment is not limited thereto, and is not enumerated here.

In this embodiment, when the UE sends multiple first messages, the UE sends the multiple first messages at the same time, for example, the UE uses different frequency resources or uses different frequency resources with different preambles (such as different The preamble index transmits the plurality of first messages simultaneously; or the UE transmits the plurality of first messages at different times, for example, multiple random access channel transmissions of the UE at different times before the end of the predetermined time (T1) The RACH transmission occasion sends the plurality of first messages. For example, the predetermined time may be set according to actual conditions, for example, the predetermined time (T1) may be a second message time window (such as RAR window).

In this embodiment, a first message is sent and a resource that sends multiple first messages (such as RACH Resource) and/or a random access preamble does not have an intersection or an intersection exists. The resource and/or random access preamble may be configured by the network device by channel and/or signaling, such as by broadcast channel/signal/signaling, and/or other semi-static or dynamic broadcast messages, and/or The UE is informed by RRC signaling, and/or physical layer dynamic signaling, and/or pre-defined/pre-configured.

In this embodiment, in the non-contention based random access, the method further includes a step (not shown): acquiring a dedicated resource allocated by the network side for the UE to send one or more first messages. In this way, the network device receives the first message on the configured resource (RACH Resource).

In this embodiment, after the UE sends the at least one first message (Msg.1), the method may further include a step (not shown): listening to the plurality of second messages, so that the listening process is performed. Receiving the plurality of second messages; wherein, during the listening period (T2), the first message is not sent, that is, after the first message is sent, the second message is monitored; or the first message may be sent during the listening period. That is, the first message is sent at different times before the end of the listening period, for example, after a first message is sent, and the subsequent first message is sent at different times before the end of the listening period.

In this embodiment, the listening period (T2) may be pre-configured by the network side, and may be an RAR window.

In this embodiment, after the third message is sent to the network device in step 101, the method further includes:

Step 102: The UE listens to the fourth message returned by the network side; the fourth message indicates at least the UE identity in the cell after the access target cell determined by the UE side or the network side, that is, at least indicates whether the UE successfully accesses; or The fourth message indicates at least the UE standard in the cell after the access target cell determined by the UE side or the network side. And the UE identifier included in the received third message, to indicate at least whether the UE successfully accesses, and thus, in the contention-based random access procedure, when multiple random attacks are sent by multiple UEs, Determining the accessed UE according to the UE identifier; in addition, the fourth message may further include other information/data according to the need, and perform an indication corresponding to the other information/data, which are not enumerated here.

The UE may use the UE identifier in the cell after accessing the target cell determined by the UE side, or use the UE identifier in the cell corresponding to the at least one third message or the selected at least one second message that is sent. The fourth message.

For example, when the UE side is not sure of the UE identity in the cell after accessing the target cell, the UE monitors the fourth message by using the UE identifier in the at least one cell corresponding to the at least one second message or the third message; The at least one second message is a second message selected by the UE, and the third message is a third message sent according to the selected second message; or, in the cell after the UE side determines the access target cell When the UE is identified, the UE monitors the fourth message by using the UE identifier in the cell after the access target cell determined by the UE side.

In this way, after the UE monitors the fourth message, the UE confirms the successful access, and the UE can use the UE identifier in the cell after the access target cell indicated by the fourth message to perform uplink and downlink data transmission, that is, The UE identifier in the cell corresponding to the scrambling sequence used by the fourth message is used as the UE identifier in the cell after accessing the target cell.

4 is a flowchart of a random access method according to Embodiment 1, as shown in FIG. 4, the method includes:

Step 401: Send at least one first message; Step 402, receive multiple second messages returned by the network side;

In this embodiment, the UE receives a plurality of second messages returned by the network side by listening, and listens to the second message, that is, receives the second message, where the method for monitoring the second message is as described above. , not repeated here.

Step 403, it is determined whether a second message or a plurality of second messages are received. When the determination result is a plurality of second messages, step 404 is performed, and when the result of the determination is a second message, step 405 is performed;

Step 404: When multiple second messages are received, select at least one second message from the multiple second messages.

In this step 404, the UE may also determine the UE identifier in the cell after accessing the target cell, and the specific implementation manners may refer to the content of the foregoing embodiment, and are not repeated here.

Step 405: Send at least one third message according to the selected second message.

In this embodiment, the specific implementation of the step 405 can refer to step 101, and details are not described herein again.

Step 406: Receive a fourth message returned by the network side.

In this embodiment, the fourth message returned by the network side is received by the interception, and the fourth message is received, that is, the fourth message is received, and the method for listening to the fourth message is as described above, and is not repeated here. .

Step 407: Receive one or more fourth messages, and establish a connection with the network device corresponding to the fourth message, respectively.

If the network supports the UE to establish a connection with multiple network devices, each network device can utilize the determined access when the network device and the other network devices receive the at least one third message sent by the user equipment. The UE identifier in the cell behind the target cell scrambles the fourth message and sends the message to the UE. After receiving the fourth message from the network devices, the UE can establish a connection with the network device.

In this embodiment, when the random access is non-contention random access, before step 401, the method may further include a step (not shown): receiving indication information of the network side, and determining, according to the indication information, that the UE sends the first The number of a message, the specific implementation of which is as described above, will not be repeated here.

In this embodiment, the UE initiates a random access procedure, which may be a contention-based random access procedure or a non-contention-based random access procedure. This embodiment is not limited thereto.

It can be seen from the foregoing embodiment that the UE can perform multiple random access attempts in parallel, thereby improving the random access success probability of the UE and reducing the random access delay of the UE. In this embodiment, when determining that the random access is successful, the UE performs uplink and downlink data transmission with the target cell.

In this embodiment, when receiving a fourth message, when the random access is successful, the UE may establish a connection with the target cell that sends the fourth message, thereby using the access target cell determined by the UE side or the network side. The UE identifier in the subsequent cell performs uplink and downlink data transmission;

When receiving a plurality of fourth messages, in a case that the UE is supported to establish a connection with multiple network devices, when the random access is successful, the UE may establish a connection with multiple target cells that send the fourth message, and utilize the UE. The UE identifier in the cell after the access target cell determined by the side or the network side and the multiple target cells respectively perform uplink and downlink data transmission.

Example 2

The second embodiment of the present invention provides a random access method, which is applied to a device side, such as a network device side, in response to a random access procedure initiated by a user equipment.

FIG. 5 is a flowchart of a random access method according to Embodiment 2 of the present invention. As shown in FIG. 5, the method includes:

Step 502: Receive at least one third cancellation sent by the user equipment according to multiple second messages returned by the network side. interest.

According to the foregoing embodiment, the network device may return multiple second messages according to the random access procedure initiated by the UE, and receive a third message sent by the UE according to the multiple second messages, and perform a subsequent random access process. Thereby, the probability of random access of the UE is improved, and the random access delay of the UE is reduced.

In this embodiment, each second message includes at least one of the following information: time calibration/advance information (TA), UE identity in the cell, first message resource indication information, random access preamble indication information, The uplink resource scheduling information of the three messages, the backoff indication information, the reception quality indication information of the first message, the network device indication information, the SS block, and/or the transmission beam indication information.

In this embodiment, the network device indication information, the SS block, and/or the transmit beam indication information are explicitly or implicitly indicated. For details, as described in Embodiment 1, the information contained in the second message is as described in Embodiment 1, and details are not described herein again.

In this embodiment, the method may further include the steps of: configuring the network device, the SS block, and/or the transmit beam and the first message resource and/or the random access preamble, and/or the resource occupied by the second message, and/or Or a scrambling sequence, and/or a mapping relationship for the identification of the scrambling sequence calculation; and/or configuring a mapping relationship between the resources occupied by the second message and the first message resource and/or the random access preamble. In this way, after the network side configures the foregoing mapping relationship, the UE may be notified to enable the UE to determine the corresponding network device, the SS block, and/or the transmit beam according to the mapping relationship, that is, the information is indicated in an implicit manner. In addition, the method may further include: configuring indication information indicating that the user identifier in the cell after accessing the target cell is determined by the UE side or by the network side; and/or configuring a reception quality threshold of the second message; and/or configuring a reception quality threshold of a message, according to the received quality threshold of the configured second message; and/or a reception quality threshold of the first message, selecting at least one second message from the plurality of second messages, the threshold being as in Embodiment 1 The implementation of TH1 and TH2 will not be described here.

In this embodiment, the third message includes the UE identifier, and/or the reception quality of the corresponding second message, and/or the UE identifier in the cell after accessing the target cell, and/or the third message sending quantity indication. information. For example, the third message sending quantity indication information may directly indicate the number (number/number) of sending the third message, or indicate whether the third message is the last third message sent by the UE.

In this embodiment, the network device may receive the third message on an uplink resource for the third message transmission indicated by the second message that it sends.

In this embodiment, the method may further include:

Step 500: Receive at least one first message sent by the UE.

Step 501: Return one or more second messages to the UE according to the at least one first message received from the UE.

In step 500, for example, receiving a plurality of first messages sent by a user equipment (UE), or receiving a first message sent by the UE in a non-single random access preamble format, or receiving a UE sent on the configured random access resource. At least one first message, wherein the plurality of network devices are configured with the random access resource;

For example, receiving a first message sent by the UE, the network device may directly return multiple second messages, for example, the network device returns multiple second messages in order to improve the success rate of receiving the second message by the UE.

In this embodiment, the non-single random access preamble format of step 500 is as described in Embodiment 1, and step 501 is as described in the first to sixth cases described in Embodiment 1, and details are not described herein again.

In this embodiment, the method further includes: configuring, for the UE, a resource (such as a RACH resource) and/or a random access preamble that sends the first message, and in step 500, the network device is configured on the resource. Receiving the first message.

In this embodiment, after step 502, the method may further include: sending a fourth message to the UE according to the received at least one third message. The fourth message indicates at least the UE identifier in the determined cell, that is, the UE identifier in the cell after the UE accesses the target cell, that is, indicates whether the random access is successful; or the fourth message indicates at least the UE side or the network. Determining, by the side, the UE identifier in the cell after accessing the target cell, and the UE identifier included in the received third message, to at least indicate whether the UE successfully accesses, and thus, in the contention-based random access process, When a random access conflict is sent by multiple UEs, the accessed UE may be determined according to the UE identifier.

In this embodiment, in step 502, after receiving the third message, the method may further include: the network device performing the fourth message (Msg.4) by using the UE identifier in the cell after accessing the target cell. Scrambling, the fourth message that is scrambled is sent to the UE. For example, the UE identifier in the cell after the access target cell may be the UE identifier in the cell determined by the UE side, or the UE identifier in the cell determined by the network side scrambles the fourth message (Msg. 4).

For example, when the UE side determines the UE identity in the cell after accessing the target cell, when the network device receives the at least one third message, the UE in the cell after the access target cell is used by the UE side. When the third message is scrambled or the identifier is included in the third message, the network device may scramble the fourth message by using the UE identifier in the cell after the access target cell.

For example, when the UE side is unsure of the UE identity in the cell after accessing the target cell, the method may also include The network device determines, according to the UE identifier in the cell corresponding to the at least one third message, the UE identifier in one cell, and uses the UE identifier in the cell as the UE identifier in the cell after accessing the target cell; The network device scrambles the fourth message using the determined UE identity within the cell.

In this embodiment, the UE identifier in the cell after the access target cell is determined in the following manner:

Determined randomly, or according to at least one of the third message, and/or the quality and/or quantity of the third message of the network side.

For example, when a plurality of third messages are received, the UE identity in the cell corresponding to the third message whose reception quality of the corresponding second message included in the third message meets the predetermined condition is determined as the cell after the target cell is accessed. The UE identifier in the cell corresponding to the third message that satisfies the predetermined condition that the reception quality of the third message meets the predetermined condition is determined as the UE identifier in the cell after accessing the target cell; for example, the predetermined condition may be receiving The highest quality or the receiving quality is higher than a certain threshold (such as TH3), wherein the third message that the receiving quality of the second message or the receiving quality of the third message meets the predetermined condition may be determined, and the third message corresponds to the cell The UE identifier is determined as the UE identifier in the cell after the target cell is accessed; or, when a third message is received, the UE identifier in the cell corresponding to the third message is directly determined as the cell in the cell after the target cell is accessed. UE ID.

In this embodiment, the method may further include: determining a resource for sending the fourth message;

Determining, by the network device, or according to the UE identifier in the cell after accessing the target cell, and/or the receiving quality and/or the received quantity of the second message, and/or the receiving quality and/or the receiving quantity of the third message. . For example, when the third message includes the UE identifier in the cell after accessing the target cell, the Tx beam corresponding to the UE identifier in the cell after the access target cell may be selected as the resource for sending the fourth message; Or selecting a Tx beam corresponding to the third message whose reception quality of the second message included in the third message meets a predetermined condition as a resource for transmitting the fourth message; or selecting a third message that the reception quality of the third message meets a predetermined condition. The corresponding Tx beam is used as a resource for transmitting the fourth message; the specific implementation of the predetermined condition is as described above, and is not repeated here. Or, when receiving a third message, selecting a Tx beam corresponding to the third message as a resource for sending the fourth message.

In this embodiment, when the network device and the other network device can exchange information, when the network device and the other network device receive the multiple third messages sent by the UE, the method further includes: determining, by the network side One node sends a third message, or receives a third message sent by another network device on the network side, for example, the network side determines a node, and the node determines a fourth message returned based on the third message received from the UE, The When the node is not the network device, but is one of the other network devices or is independent of the network device and one of the other networks, the network device transmits the received third message to the node, and the node sends the message to the node. The UE returns a fourth message; when the network device is the node, the network device further receives a third message sent by another network device, and the network device is based on the third message received from the UE and received from other network devices. Send the fourth message.

In addition, if the network supports the UE to establish a connection with multiple network devices, each network device can determine the access target cell after the network device and the other network device receive the at least one third message sent by the user equipment. The UE identifier in the cell, and/or the network device and/or resource (such as Tx beam) that sends the fourth message, whereby each network device can utilize the respective determined cell after the access target cell The UE identifier is scrambled and sent to the UE. After receiving the fourth message from the network devices, the UE can establish a connection with the network devices, thereby improving the probability of successful random access. , reduce access delay.

FIG. 6 is a flowchart of a random access method according to Embodiment 2, as shown in FIG. 6, the method includes:

Step 601: Receive at least one first message sent by the UE.

Step 602, returning at least one second message;

Step 603: Receive at least one third message sent by the UE.

Step 604, it is determined whether a third message or a plurality of third messages are received. When the determination result is multiple, step 605 is performed, and when the determination result is one, step 608 is performed;

Step 605: Determine whether the received third message includes the UE identifier in the cell after accessing the target cell, and if yes, perform step 606, otherwise perform step 608; step 606, use the identifier as the UE access network (target cell After the UE identifier in the cell to be used, the fourth message is scrambled by using the UE identifier in the cell after the access target cell;

Step 607: Determine, according to the UE identifier in the cell corresponding to the at least one third message, a UE identifier in a cell after accessing the target cell, and use the UE identifier in the cell after the target cell to access the fourth message. Perform scrambling;

Step 608: The UE identifier in the cell corresponding to the third message is directly determined as the UE identifier in the cell after the access target cell, and the fourth message is added by using the UE identifier in the cell after the access target cell. Disturbance

Step 609: Send the scrambled fourth message to the UE.

In this embodiment, when the random access is non-contention random access, the method further includes (not shown) configuring and transmitting indication information, where the indication information is used by the UE side to determine the number of the first message to be sent, and the specific The embodiment is as described above and will not be repeated here.

In this embodiment, before the step 609, the method further includes (not shown) determining a resource for sending the fourth message, and the specific implementation manner is as described above, and is not repeated here.

In this embodiment, it may be determined whether the UE identifier in the cell after the access target cell is implicitly indicated. If the scrambled identifier is obtained, step 606 is performed; otherwise, step 608 is performed.

In this embodiment, after the step 609, when the UE allows to establish a connection with the one or more network devices, the UE establishes a connection with the network device; after the random access succeeds, the UE identifier in the selected cell is used. Up and down data transmission. FIG. 7 is a flowchart of a random access method according to Embodiment 2, as shown in FIG. 7, the method includes:

Step 701: Receive at least one first message sent by the UE.

Step 702, returning at least one second message;

Step 703: Receive at least one third message sent by the UE.

Step 704, it is determined whether it is a node determined by the network side, when the determination result is no, step 705 is performed, otherwise step 706 is performed;

Step 705: Send a decision indication to the node, so that the node determined by the network determines the network device and the resource that sends the Msg.4; wherein, in step 705, the node determines that the network device that sends the Msg.4 is the network device. The method further includes step 707 (optional), otherwise the operation ends.

Step 706: Receive a third message sent by another network device, and determine a network device that sends the Msg.4 and a resource. If it is determined in step 706 that the network device that sends the Msg.4 is the network device, step 708 is performed. Otherwise the operation ends.

Step 707: Receive a decision indication sent by the node, determine, according to the third message, a UE identifier in a cell after accessing the target cell, and perform scrambling on the fourth message.

Step 708: Determine, according to the third message, the UE identifier in the cell after accessing the target cell, and perform scrambling on the fourth message. The specific implementation manner of determining the UE identifier in the cell after accessing the target cell may refer to the step. 603-608, the repetition will not be repeated.

Step 709: Send the scrambled fourth message to the UE.

In this embodiment, when the random access is non-contention random access, the method further includes (not shown) The indication information is sent and used by the UE to determine the number of the first message to be sent. The specific implementation manner is as described above, and is not repeated here.

Therefore, after receiving the fourth message from the network device, the UE can establish a connection with the network device, thereby improving the probability of successful random access and reducing the access delay.

Example 3

This embodiment 3 describes the random access method of the embodiment of the present invention in detail by using a specific example.

8 is a flowchart of a random access method according to Embodiment 3 of the present invention, in which a UE sends a plurality of first messages to a network device, for example, N is transmitted, and N is greater than 1, corresponding to the first type described in Embodiment 1. In the case, as shown in FIG. 8, the method includes:

Step 801: The UE sends a first message (Msg.1) to the network device.

In this embodiment, the UE sends multiple Msg.1 to a network device, such as a base station, a TRP, etc., that is, sends a random access preamble to initiate a random access procedure; the format of the Msg.1, and the Msg.1 are sent. The quantity is as shown in Embodiment 1, and will not be described here;

The multiple RACH clarification opportunities that are sent by the UE at the same time or at different times before the end of the predetermined time (T1) are sent to the multiple Msg.1, as described in Embodiment 1, and details are not described herein again.

Step 802, the network device receives the Msg.1, and returns a second message (Msg.2) to the UE;

In this embodiment, multiple Msg.2, that is, a response message of the first message, such as a RAR message, and the information contained in the RAR is as described in Embodiments 1 and 2, and details are not described herein again.

Step 803, the UE receives the Msg.2 returned by the network device, and selects at least one Msg.2;

In this embodiment, the UE may start listening after transmitting one or more Msg.1, receive the Msg.2 by listening, and send or no longer send the Msg.1 during the monitoring, as in Embodiment 1. And 2, no longer repeat them here;

When the UE monitors the Msg.2, the UE may select at least one of the multiple Msg.2, that is, select one, multiple, or all Msg.2, and the manner of selection is as described in Embodiments 1 and 2. , the contents of which are incorporated herein, and will not be described here.

Step 804: Send at least one Msg.3 to the network device according to the information included in the selected at least one Msg.2;

In this embodiment, when the UE selects one Msg.2, the information of the selected Msg.2 may be used. The network device that sends the selected Msg.2 sends an Msg.3; when the UE selects multiple Msg.2, multiple Msg.3 may be sent according to the information contained in the multiple Msg.2, where the Msg is sent. The method of .3, the information contained in the Msg.3 is as described in Embodiments 1 and 2, and the contents thereof are incorporated herein, and are not described herein again.

Step 805: The network device receives at least one Msg.3 sent by the UE, and performs scrambling on the fourth message (Msg.4) based on the Msg.3.

For example, when the UE side determines the UE identity in the cell after accessing the target cell, and includes the identifier in the Msg.3 (such as the message content included in the Msg.3 or scrambles the Msg.3), The network device may use the UE identifier in the cell after accessing the target cell to scramble the Msg.4; when the UE side determines the UE identity in the cell after accessing the target cell, the network device may obtain the multiple Determining the UE identity in the cell after the access target cell in the cell identifier corresponding to the Msg.3, and scrambling the Msg.4 by using the determined UE identity in the cell after the access target cell, determining the connection The method for the UE identity in the cell after the target cell is as described in Embodiments 1 and 2, and details are not described herein; for example, when multiple Msg.3s are received, the Msg.2 included in Msg.3 is used. The UE identity in the cell corresponding to the Msg.3 whose reception quality meets the predetermined condition is determined as the UE identity in the cell after accessing the target cell; or the cell corresponding to the Msg.3 in which the reception quality of the Msg.3 satisfies the predetermined condition The UE identity is determined as the UE identity in the cell after accessing the target cell; for example, the predetermined condition may be The receiving quality is the highest or the receiving quality is higher than a certain threshold. The receiving quality of the Msg.2 or the receiving quality of the Msg.3 meets the predetermined condition of Msg.3, and the UE identifier in the cell corresponding to the Msg.3 is determined. Determining the UE identity in the cell after accessing the target cell; or, when receiving one Msg.3, directly determining the UE identity in the cell corresponding to the Msg.3 as the UE in the cell after accessing the target cell Logo.

After determining the UE identity in the cell after accessing the target cell, the Msg.4 may be scrambled by using the UE identifier in the cell after the determined access target cell.

Step 806, the network device returns the Msg.4 to the UE;

In this embodiment, the network device can return an Msg.4 to the UE.

Step 807, the UE receives the Msg.4;

In this embodiment, after the Msg.3 is sent by the UE, the Msg.4 can be received by monitoring. The specific monitoring mode is as described in Embodiments 1 and 2, and details are not described herein.

When the Msg.4 is monitored, the UE identifier in the cell that is scrambled by the Msg.4 (ie, the UE identifier in the cell after accessing the target cell) may be obtained, and the random access is successful; wherein the Msg is scrambled The identifier of .4 is the identifier in the cell after the access target cell determined by the UE side, and the UE uses the identifier to monitor the Msg.4, and is scrambled. When the identifier of the Msg.4 is the identifier in the cell after the access target cell is determined by the network side, the UE performs a blind check to determine the UE identifier in the cell that scrambles the Msg.4.

After the random access is successful, the UE can establish a connection with the network side for data transmission.

As shown in FIG. 8, the method may further include: Step 808: After the random access succeeds, the UE uses the UE identifier in the cell to perform uplink and downlink data transmission.

In this embodiment, the step 808 is optional, that is, after the random access is successful, other operations may be performed, or no operation is performed, and the embodiment is not limited thereto.

For a non-contention random access procedure, the method may further include the step 800 of configuring the first resource and/or the random access preamble.

9A and FIG. 9B are flowcharts of a random access method according to Embodiment 3 of the present invention, in which one UE sends a first message to a network device, and FIG. 9A corresponds to the second case described in Embodiment 1, as shown in FIG. 9A. As shown, the method includes:

Step 901: The UE sends a first message (Msg.1) to the network device.

In this embodiment, the UE transmits the Msg.1 using a non-single preamble, as shown in the format shown in FIG. 2B.

Step 902, the network device receives the Msg.1, and returns a second message (Msg.2) to the UE;

In this embodiment, the network device may receive different OFDM symbols and/or SEQs by using different receive beams (Rx beams), as shown in FIG. 3, so that multiple Msg.2, such as RAR messages, may be respectively fed back. The information contained in the second message is as described in Embodiments 1 and 2, and details are not described herein again.

Step 900 and Step 903 to Step 908 are similar to Step 800 and Steps 803 to 808 shown in FIG. 8 , and the contents thereof are incorporated herein, and details are not described herein again.

FIG. 9B corresponds to the sixth case described in Embodiment 1, as shown in FIG. 9B, the method includes:

Step 901', the UE sends a first message (Msg.1) to the network device;

In this embodiment, the UE transmits the Msg.1 using a single preamble, as shown in the format of FIG. 2A.

Step 902', the network device receives the Msg.1, and returns a plurality of second messages (Msg.2) to the UE;

In this embodiment, the network device may receive different OFDM symbols and/or SEQs by using different receive beams (Rx beams), as shown in FIG. 3, so that multiple Msg.2, such as RAR messages, may be respectively fed back. The information contained in the second message is as described in Embodiments 1 and 2, and details are not described herein again;

In step 902 ′, the network device returns a plurality of second messages to the UE, that is, the network device determines, according to the success rate of the second message, the number of returned second messages. , For example, the greater the success rate, the more the number of second messages fed back, and vice versa, but this embodiment is not limited thereto.

Step 900', step 903' to step 908' are similar to step 800 and steps 803 to 808 shown in FIG. 8, and the contents thereof are incorporated herein, and details are not described herein again.

FIG. 10A is a flowchart of a random access method according to Embodiment 3 of the present invention, in which one UE sends a first message to multiple network devices, corresponding to the third case described in Embodiment 1. As shown in FIG. 10A, the method includes:

Step 1001: The UE sends Msg.1 to the network device.

In this embodiment, the UE transmits k Msg.1 to each of the n network devices, where n is greater than or equal to 2, k=1.

Step 1002: Each network device receives the Msg.1, and returns a second message (Msg.2) to the UE.

Step 1003, the UE receives n Msg.2 returned by n network devices, and selects at least one Msg.2;

In this embodiment, the UE may start listening after sending the Msg.1;

The UE may select at least one of the n Msg.2, that is, select one, multiple, or all Msg.2, and the manner of selection is as described in Embodiments 1 and 2, and the content thereof is incorporated herein, here is not Let me repeat.

Step 1004: Send at least one Msg.3 according to the information included in the selected at least one Msg.2;

In this embodiment, when the UE selects at least one Msg.2, respectively, sending a Msg.3 to the network device corresponding to the selected Msg.2;

For example, when the UE selects one Msg.2, the UE may send Msg.3 to the network device that sends the Msg.2, which is similar to the existing mechanism; when the UE selects M Msg.2, m If the value is greater than 1 and less than or equal to n, the UE may send the Msg.3 to the m corresponding network devices, so that multiple random access attempts can be performed at the same time, the access success rate is improved, and the access delay is reduced.

Step 1005: The corresponding network device receives the Msg.3 sent by the UE, and performs scrambling on the fourth message (Msg.4) based on the Msg.3.

In this embodiment, for each network device, an Msg.3 is received, and the scrambling is similar to the existing mechanism, and details are not described herein again.

Step 1006, the corresponding network device returns the Msg.4 to the UE;

In this embodiment, in step 1003, when the UE selects one Msg.2, the corresponding network device may return one Msg.4; when the UE selects m Msg.2, the corresponding m network devices Can return separately One Msg.4.

Step 1007, the UE receives the Msg.4;

In this embodiment, after the Msg.3 is sent by the UE, the Msg.4 can be received by monitoring. The specific monitoring mode is as described in Embodiments 1 and 2, and details are not described herein; thus, by using the Msg .4 performing monitoring, for example, when detecting the UE identity in the cell after the access target cell of the Msg.4 is scrambled, the random access is successful; wherein the identifier of the Msg.4 is scrambled by the UE side. When accessing the identifier in the cell after the target cell, the UE uses the identifier to monitor the Msg.4, and when the identifier of the Msg.4 is the identifier of the cell after the access target cell determined by the network side, the UE Performing a blind check to determine the UE identity in the cell that scrambles the Msg.4;

For example, when a network device returns a Msg.4, the UE can access the network device; or when the m network devices respectively return a Msg.4, the UE can access the m network devices, thereby Establish a connection with the m network devices.

After the random access is successful, the method may further include a step 1008, where the UE uses the UE identifier in the cell to perform uplink and downlink data transmission.

The network device of the Msg. (Tx beam), after determining the network device that sends Msg.4, the other network device sends the received Msg.3 to the network device, and in the cell after the Msg.3 does not include the access target cell. When the UE is identified, the UE identifier in the cell after the access target cell needs to be determined. In this manner, in step 1006, the determined network device that sends the Msg.4 returns a Msg.4 by using the determined resource.

FIG. 10B is a flowchart of a random access method according to Embodiment 3 of the present invention, in which one UE sends a first message to multiple network devices, corresponding to the third case described in Embodiment 1. As shown in FIG. 10B, the method is different from that in FIG. 10A in that the network side determines that the decision node transmitting Msg.4 is not one of the network device 1, ..., the network device n, and the method further includes, step 1004 The corresponding network device sends a decision request to the node determined by the network side. In step 1005', the node determines the network device that sends the fourth message and the corresponding resource that sends the fourth message; in step 1005", The node sends a decision indication to the network device x that determines to send the fourth message. In step 1006', the network device x returns the Msg.4 to the UE; the other steps 1000'-1004', 1007' in FIG. 10B- The 1008' embodiment is the same as 1000-1004, 1007-1008 of FIG. 10A and will not be repeated here.

It can be seen from the foregoing embodiment that the UE can initiate multiple random access attempts to the network device in parallel, thereby improving the UE. The probability of successful access reduces the access delay.

11 is a flowchart of a random access method according to Embodiment 3 of the present invention, in which one UE sends a plurality of first messages to a plurality of network devices, corresponding to the fourth case described in Embodiment 1. As shown in FIG. 11, the method includes:

Step 1101, the UE sends Msg.1 to the network device;

In this embodiment, the UE transmits k Msg.1 to each of the n network devices, where n is greater than or equal to 2 and k is greater than 1.

Step 1102, each network device receives the Msg.1, and returns a second message (Msg.2) to the UE respectively.

In this embodiment, each network device can return k Msg.2, respectively.

Step 1103, the UE receives Msg.2 returned by the n network devices respectively, and selects at least one Msg.2;

Step 1104: Send at least one Msg.3 to the corresponding network device according to the information included in the selected at least one Msg.2;

In this embodiment, when the UE selects at least one Msg.2, respectively, sending Msg.3 to the network device corresponding to the selected Msg.2;

For example, when the UE selects one Msg.2, the UE may send Msg.3 to the network device that sends the Msg.2; if the UE selects multiple Msg.2, the multiple Msg.2 comes from When the same network device is used, the UE may send Msg.3 to the network device that sends the Msg.2; when the multiple Msg.2 are from different network devices, the UE may send the Msg.3 to different network devices. .

Step 1105: The corresponding network device receives the Msg.3 sent by the UE, and performs scrambling on the fourth message (Msg.4) based on the Msg.3.

In this embodiment, for each network device, when receiving a Msg.3, the scrambling is similar to the existing mechanism, and details are not described herein; when receiving more than one Msg.3, the scrambling and the embodiment are 1 is similar to the steps 1005 and 905 shown in FIG. 2 and FIG. 10, and details are not described herein again.

Step 1106, the corresponding network device returns the Msg.4 to the UE;

In this embodiment, the corresponding network device can return at least one Msg.4.

Step 1107, the UE receives the Msg.4;

In this embodiment, after the Msg.3 is sent by the UE, the Msg.4 can be monitored. The specific monitoring mode is as described in Embodiments 1 and 2, and is not described here; thus, by using the Msg. 4, performing monitoring, detecting the UE identifier in the cell after the access target cell of the Msg.4 is scrambled, and receiving the Msg.4, the random access is successful; wherein the scrambled identifier is determined by the UE side When accessing the identifier in the cell after the target cell, the UE adopts The Msg.4 is monitored by the identifier, and when the scrambled identifier is an identifier in a cell after the access target cell determined by the network side, the UE performs a blind check to determine the intra-cell in the Msg. UE identification.

Step 1108: After the random access succeeds, the UE uses the UE identifier in the cell to perform uplink and downlink data transmission.

In the scenario of FIG. 11, the n network devices can exchange information. After step 1104, the network device of the Msg.3 receives the mutual interaction information, determines the network device that sends the Msg.4, and sends the resource of the Msg.4. (Tx beam), after determining the network device that sends Msg.4, the other network device sends the received Msg.3 to the network device, and in the cell after the Msg.3 does not include the access target cell. When the UE is identified, the UE identifier in the cell after the access target cell is also determined, so that, in step 1106, the determined network device that sends the Msg.4 returns a Msg.4 using the determined resource; The side determines that the node transmitting Msg.4 is not one of the network device 1, ... the network device n. In step 1104, the corresponding network device sends the Msg.3 to the node determined by the network side, and in step 1105, the node receives The Msg.3, and scrambling the fourth message (Msg.4) based on the Msg.3; in step 1106, the node returns the Msg.4 to the UE.

In this embodiment, in step 1101, one Msg.1 that is sent to a part of the network devices may be sent to another part of the network device by more than one Msg.1; in step 1102, each network device may also be Returns 1 Msg.2, or some network devices return an Msg.2, and some network devices return multiple Msg.2.

12 is a flowchart of a random access method according to Embodiment 3 of the present invention, in which a UE sends at least one first message on a configured resource (such as a RACH resource), and multiple network devices are configured with the resource, corresponding to the embodiment. The fifth case described in 1. As shown in FIG. 12, the method includes:

Step 1201: The UE sends a first message (Msg.1) to the network device.

In this embodiment, the UE sends a Msg.1 to the network device, such as a base station, a TRP, or the like, on the configured resource, that is, sends a random access preamble.

Step 1202: The network device configured with the resource receives the Msg.1, and returns a second message (Msg.2) to the UE.

In this embodiment, if at least one network device and the network device are configured with the same resource, multiple Msg.2, such as a RAR message, may be returned, and the second message includes information as described in Embodiments 1 and 2. I won't go into details here.

Subsequent steps 1203 to 1208 are similar to steps 1003 and 1008 shown in FIG. 10, and are not described herein again.

According to the foregoing embodiment, the UE may initiate multiple random access attempts to the network device in parallel, thereby improving the UE. The probability of successful access reduces the access delay.

The foregoing embodiment may be used in a non-contention based random access procedure. In the non-contention based random access procedure, before steps 1001 to 1201, the method may further include steps 1000 to 1200, where the network device configures a resource set for the UE. Specifically, as described in Embodiments 1 and 2, in step 1001 to 1201, the UE transmits the Msg.1 by using the configured resource set, and in steps 1002 to 1202, the network device receives on the configured resource. The Msg.1.

Example 4

The fourth embodiment provides a random access device. The principle of the device is similar to that of the first and third embodiments. Therefore, the specific implementation may refer to the implementation of the method of the first embodiment and the third embodiment. The same points will not be repeated.

13 is a schematic diagram of a random access device according to Embodiment 4 of the present invention. As shown in FIG. 13, the device 1300 includes a first sending unit 1301, and the first sending unit 1301 is configured to send at least one according to multiple second messages returned by the network side. Third message.

Time calibration/advance information, UE identity in the cell, first message resource indication information, random access preamble indication information, uplink resource scheduling information of the third message, backoff indication information, reception quality indication information of the first message, network Device indication information, SS block, and/or transmit beam indication information.

In this embodiment, each third message includes: a UE identifier, and/or a reception quality of a corresponding second message, and/or a UE identifier in a cell after accessing the target cell, and/or a third message transmission. Quantity indication information.

In this embodiment, the information contained in the second message and the third message is referred to in Embodiment 1, and details are not described herein again.

As shown in FIG. 13, the apparatus 1300 may further include a first selecting unit 1302 and a first receiving unit 1303, where the first receiving unit 1303 is configured to receive the network back according to the first message sent by the user equipment (UE). Second message. The first selecting unit 1302 is configured to select at least one second message from the plurality of second messages; and the first sending unit 1301 sends the at least one third message according to the at least one second message selected by the first selecting unit 1302.

In this embodiment, the first selecting unit 1302 is configured to randomly select at least one second message from the plurality of second messages; or, according to at least one information in the second message, and/or the second message receiving quality and / or The number of receptions selects at least one second message.

In this embodiment, when the first selecting unit 1302 selects the at least one second message according to the receiving quality of the first message, the second message that the receiving quality of the first message is higher than the predetermined threshold is not selected; in addition, the first selection The unit 1302 may further select one of the UE identifiers in the multiple cells included in the received multiple second messages. For specific implementations, refer to Embodiment 1, and details are not described herein again.

In this embodiment, the device may further include:

An information acquisition unit (not shown), configured to receive the network device, the SS block, and/or the transmit beam configured by the network side, and the first message resource and/or the random access preamble, or the second message a mapping relationship of a resource, or a scrambling sequence, or a random access wireless network temporary identity, and/or a mapping relationship between a resource occupied by the second message and the first message resource and/or a random access preamble, and/or for Indicates, by the UE side, or by the network side, indication information of the UE identity in the cell after accessing the target cell, and/or configuring the second message reception quality threshold, and/or configuring the reception quality threshold of the first message.

In this embodiment, as shown in FIG. 13, the device 1300 further includes a first listening unit 1304, where the first listening unit 1304 is configured to listen to the fourth message returned by the network device; the fourth message indicates at least the UE side or the network side. Determining at least the UE identity in the cell after accessing the target cell, that is, at least indicating whether the UE is successfully accessed; or the fourth message indicating at least the UE identity in the cell after the access target cell determined by the UE side or the network side, and The UE identifier included in the received third message, to indicate at least whether the UE successfully accesses, and thus, in the contention-based random access procedure, when the multiple access UE sends a random access collision, according to the UE Identifying the UE that determines the access; using the UE identifier in the cell after accessing the target cell determined by the UE side, or using the cell corresponding to the at least one third message or the selected at least one second message that is sent The UE identifier within the inner listener listens to the fourth message. The specific embodiment is as described in Embodiment 1, and will not be repeated here.

In this embodiment, as shown in FIG. 13, the apparatus 1300 further includes a second sending unit (not shown) for transmitting at least one first message to the network side. Wherein, when multiple first messages are sent, the multiple first messages are sent at the same time or sent at different times. The specific transmission manner is as described in Embodiments 1 and 3, and details are not described herein again.

In this embodiment, the second sending unit uses different frequency resources or uses the same frequency resource to transmit the plurality of first messages simultaneously with different preambles; or multiple random access channels at different times before the scheduled time arrives. A (RACH) transmission opportunity transmits the plurality of first messages.

In this embodiment, it is used to support the UE to send a first message and to support the UE to send multiple first cancellations. There is no intersection or intersection of resources.

In this embodiment, the apparatus 1300 further includes a first determining unit (not shown), the first determining unit is configured to determine the quantity of the first message, where the number of the first message sent by the UE is determined. For a specific implementation manner, refer to Embodiment 1, and details are not described herein again.

The sending unit sends or does not send the first message during the first listening unit 1304 listening to the second message.

A user equipment is also provided in this embodiment, and the user equipment is configured with the random access device 1300 as described above.

FIG. 14 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. As shown in FIG. 14, user equipment 1400 can include a central processing unit (CPU) 1401 and a memory 1402; and memory 1402 is coupled to central processing unit 1401. The memory 1402 can store various data; in addition, a program for data processing is stored, and the program is executed under the control of the central processing unit 1401 for random access.

In one embodiment, the functionality of device 1300 can be integrated into central processor 1401. The central processing unit 1401 may be configured to implement the random access method described in Embodiment 1.

For example, the central processor 1401 can be configured to transmit at least one third message according to a plurality of second messages returned by the network side.

For other configurations of the central processing unit 1401, reference may be made to Embodiment 1, and details are not described herein again.

In another embodiment, the above device 1300 can be configured separately from the central processing unit 1401. For example, the device 1300 can be configured as a chip connected to the central processing unit 1401, such as the random access unit shown in FIG. The control of device 1401 implements the functionality of device 1300.

In addition, as shown in FIG. 14, the user equipment 1400 may further include: a communication module 1403, an input unit 1404, a display 1406, an audio processor 1405, an antenna 1407, a power source 1408, and the like. The functions of the above components are similar to those of the prior art, and are not described herein again. It should be noted that the user equipment 1400 does not have to include all the components shown in FIG. 14; in addition, the user equipment 1400 may also include components not shown in FIG. 14, and reference may be made to the prior art.

It can be seen from the foregoing embodiment that the UE can perform multiple random access attempts in parallel, thereby improving the random access success probability of the UE and reducing the random access delay of the UE.

Example 5

The embodiment 5 provides a network device. The method for solving the problem is similar to the method of the embodiment 2 and the embodiment 3. Therefore, the specific implementation can be implemented by referring to the method of the embodiment 2 and the embodiment 3, and the content is the same. The description will not be repeated.

Figure 15 is a diagram showing the random access device of the fifth embodiment. As shown in FIG. 15, the apparatus 1500 includes: a second receiving unit 1501, configured to receive at least one third message that is sent by a user equipment (UE) according to multiple second messages returned by the network side.

In this embodiment, the information included in each of the second message and the third message is as described in Embodiment 1-4, and details are not described herein again.

In this embodiment, as shown in FIG. 15, the apparatus 1500 further includes a third sending unit 1502, where the third sending unit 1502 is configured to return one or more pieces to the UE according to the at least one first message received from the UE. Two messages.

In this embodiment, the device may further include:

a configuration unit (not shown) for configuring the network device, the SS block and/or the transmit beam with the first message resource and/or the random access preamble, or the resource occupied by the second message, or the scrambling sequence, or random And a mapping relationship between the resources of the second message and the first message resource and/or the random access preamble; and/or configured to indicate by the UE side or by the network side Determining the indication information of the user identifier in the cell after accessing the target cell; and/or configuring the second message reception quality threshold; and/or configuring the reception quality threshold of the first message. For the specific implementation manner, refer to Embodiments 1 and 2. , will not repeat them here.

In this implementation, the apparatus may further include: a third receiving unit 1505, configured to receive at least one first message sent by the user equipment (UE), where the method includes receiving a plurality of first messages sent by the UE, or receiving the UE The first message sent by the non-single random access preamble format or the at least one first message sent by the UE on the configured random access resource, where the plurality of network devices are configured with the random access resource.

In this embodiment, as shown in FIG. 15, the device 1500 further includes:

a fourth sending unit 1503, configured to send, by the third sending unit 1503, a fourth message to the UE according to the received at least one third message, where the fourth message indicates at least the cell after the access target cell determined by the UE side or the network side a UE identifier, that is, at least indicating whether the UE is successfully accessed; or the fourth message indicates at least the UE identifier in the cell after the access target cell determined by the UE side or the network side, and the received third message The UE is configured to indicate at least whether the UE is successfully accessed. Therefore, in the contention-based random access procedure, when a random access collision is sent by multiple UEs, the accessed UE may be determined according to the UE identifier.

In this embodiment, as shown in FIG. 15, the device 1500 further includes:

The scrambling unit 1504 is configured to scramble the fourth message by using the UE identifier in the cell after accessing the target cell.

The fourth sending unit 1503 is configured to send the scrambled fourth message to the UE. For a specific scrambling manner, refer to Embodiment 1, and details are not described herein again.

In this embodiment, the device may further include:

a first determining unit (not shown), configured to randomly determine a UE identifier in a cell as a UE identifier in a cell after accessing the target cell; or, according to at least one information according to the third message, and/or a network The receiving quality and/or the number of the third message of the side determines the UE identity in one cell as the UE identity in the cell after the access target cell.

a second determining unit (not shown), configured to determine a resource for transmitting the fourth message; wherein the second determining unit randomly determines the resource, or according to a UE identifier in a cell after accessing the target cell, and/ Or the second message reception quality and/or the received quantity, and/or the reception quality and/or the received quantity of the third message determine the resource.

In the embodiment, a network device is further provided, and the network device is configured with a random access device 1500 as described above.

FIG. 16 is a schematic diagram showing the structure of a base station according to an embodiment of the present invention. As shown in FIG. 16, base station 1600 can include a central processing unit (CPU) 1601 and a memory 1602; and memory 1602 coupled to central processing unit 1601. The memory 1602 can store various data; in addition, a program for data processing is stored, and the program is executed under the control of the central processing unit 1601 for random access.

In one embodiment, the functionality of device 1500 can be integrated into central processor 1601. The central processing unit 1601 may be configured to implement the random access method described in Embodiment 2.

For example, the central processor 1601 can be configured to receive at least one third message sent by a user equipment (UE) according to a plurality of second messages returned by the network side.

For other configurations of the central processing unit 1601, refer to Embodiment 2, and details are not described herein again.

In another embodiment, the above device 1500 can be configured separately from the central processing unit 1601. For example, the device 1500 can be configured as a chip connected to the central processing unit 1601, such as the random access unit shown in FIG. The control of device 1601 implements the functionality of device 1500.

In addition, as shown in FIG. 16, the base station 1600 may further include: a transceiver 1603, an antenna 1604, and the like; wherein the functions of the foregoing components are similar to the prior art, and details are not described herein again. It is worth noting that the base station 1600 is not It is necessary to include all of the components shown in Fig. 16; in addition, the base station 1600 may also include components not shown in Fig. 16, and reference may be made to the prior art.

Example 6

17A and 17B are schematic views of a communication system of Embodiment 6. As shown in FIG. 17A, the communication system 1700 includes a network device 1701 and a user equipment 1702 on the network side; the user equipment 1702 sends at least one third message to the network side according to multiple second messages returned by the network side; One of the network devices 1701 receives the at least one third message sent by the UE 1702.

As shown in FIG. 17B, the communication system 1700 includes a plurality of network devices 1701 and user equipments 1702 on the network side; the user equipment 1702 transmits at least one third message to the network side according to multiple second messages returned by the network side; The plurality of network devices 1701 receive the at least one third message sent by the UE 1702.

The configuration of the user equipment 1702 and the network device 1701 is as described in Embodiment 4 and Embodiment 5. The workflow of the system is as shown in Embodiment 1-3, and the content thereof is incorporated herein, and details are not described herein again.

Example 7

The seventh embodiment of the present invention provides a random access method, which is applied to a device side that initiates a random access procedure to a network side, such as a user equipment side.

FIG. 18 is a flowchart of a random access method according to Embodiment 18 of the present invention. As shown in Figure 18, it includes:

Step 1801: The user equipment (UE) receives a plurality of second messages (Msg. 2) returned by the network side according to the first message (Msg.1) sent by the UE.

According to the foregoing embodiment, after the UE initiates a random access procedure to the network side, the UE may receive multiple second messages returned by the network side to perform a subsequent random access procedure according to the second message, so that, based on the method, The UE can parallel multiple random access attempts, thereby improving the probability of random access of the UE and reducing the random access delay of the UE.

In this embodiment, the second message (Msg. 2) may be a random access response (RAR, Radom Access). The response message may be from the same network device or from a plurality of different network devices, where the information of the second message and the example of the first message are as described in Embodiment 1, and details are not described herein again.

In this embodiment, the method may further include (not shown): the UE sends at least one first message (Msg.1) to the network side. In this step, the UE initiates a random access procedure, which may be a contention-based random access procedure or a non-contention-based random access procedure, and the specific implementation manner is as described in Embodiment 1. I won't go into details here.

In this embodiment, the method may further include a step (not shown): determining the number (number/number of transmissions) of transmitting the first message, or receiving the number of the first message (the number of the first message) indicated by the network side /The number of transmissions). And after determining to send the number of the first message, the method may further include: determining a resource for transmitting the first message. The specific implementation manner is as described in Embodiment 1, and details are not described herein again.

In this embodiment, there are multiple cases in which the network side returns multiple second messages, and the specific implementation manner is as described in Embodiment 1, and details are not described herein again.

In this embodiment, after the UE sends the at least one first message (Msg.1), the UE receives the multiple second messages by monitoring; wherein, during the listening period (T2), the first message is not sent. That is, after the first message is sent, the second message is monitored; or the first message may be sent during the listening period, that is, the first message is sent at different times before the end of the listening period, for example, after sending a first message. Listening, sending the subsequent first message at different times before the end of the listening period.

In this embodiment, after step 1801, the method may further include a step 1802, the UE selecting at least one second message from the plurality of second messages, and additionally, when the UE selects multiple second messages, the method It also includes (not shown): determining the UE identifier in the cell after accessing the target cell; the specific implementation is as described in Embodiment 1, and details are not described herein again.

In this embodiment, after step 1802, the method may further include step 1803, sending at least one third message (Msg.3) according to the selected at least one second message. The content of the third message is as described in Embodiment 1, and details are not described herein again.

As can be seen from the foregoing, if the UE side determines the UE identity in the cell after accessing the target cell, the UE identifier in the cell after the determined access target cell may be included in the third message to notify the network device, if the UE side does not After determining the UE identity in the cell after accessing the target cell, the third message does not include the UE identity in the cell after the access target cell, and the network side may determine the cell in the cell after the access target cell UE identity, For example, the network side randomly determines, or according to at least one information in the third message, and/or determines the UE identity in the cell as the UE in the cell after the access target cell according to the reception quality/number of the third message on the network side. Logo.

In this embodiment, after the third message is sent to the network device, the method further includes: (not shown): the UE listens to the fourth message returned by the network device, and the specific implementation manner is as described in Embodiment 1. I will not repeat them here.

In this embodiment, the method may further include: receiving, by the network side, the network device, the SS block, and/or the transmit beam and the first message resource and/or the random access preamble, or the resource occupied by the second message, or a scrambling sequence, or a mapping relationship of a random access wireless network temporary identifier, and/or a mapping relationship between a resource occupied by the second message and the first message resource and/or a random access preamble, and/or used to indicate by the UE The side or the network side determines the indication information of the UE identity in the cell after accessing the target cell, and/or configures the second message reception quality threshold, and/or configures the reception quality threshold of the first message. It can be seen from the foregoing embodiment that the UE can perform multiple random access attempts in parallel, thereby improving the random access success probability of the UE and reducing the random access delay of the UE.

Example 8

The embodiment 8 provides a random access device. The principle of the device is similar to the method of the seventh embodiment. Therefore, the specific implementation may refer to the implementation of the method in the seventh embodiment. Description.

FIG. 19 is a schematic diagram of a random access device according to Embodiment 8 of the present invention. As shown in FIG. 19, the device 1900 includes a first receiving unit 1901, and the first receiving unit 1901 is configured to receive a first sent by a network side according to a user equipment (UE). Multiple second messages returned by the message.

As shown in FIG. 19, the apparatus 1900 may further include a first selecting unit 1902 and a first sending unit 1903, wherein the first selecting unit 1902 is configured to select at least one second message from the plurality of second messages; The unit 1903 is configured to send the at least one third message according to the selected second message.

In this embodiment, the information included in each third message is as described in Embodiment 1, and details are not described herein again.

In this embodiment, the first selecting unit 1902 is configured to randomly select at least one second message from the plurality of second messages; or, according to at least one information in the second message, and/or the second message receiving quality And/or the number selects at least one second message.

In this embodiment, when the first selection unit 1902 selects the at least one second message according to the reception quality of the first message, the second message that the reception quality of the first message is higher than the predetermined threshold is not selected; in addition, the first selection The unit 1902 may further select one of the UE identifiers in the multiple cells included in the received multiple second messages. For specific implementations, refer to Embodiment 1, and details are not described herein again.

In this embodiment, as shown in FIG. 19, the device 1900 further includes a first listening unit 1904, where the first listening unit 1904 is configured to listen to the fourth message returned by the network device; the fourth message indicates at least the UE side or the network side. Determining at least the UE identity in the cell after accessing the target cell, that is, at least indicating whether the UE is successfully accessed; or the fourth message indicating at least the UE identity in the cell after the access target cell determined by the UE side or the network side, and The UE identifier included in the received third message, to indicate at least whether the UE successfully accesses, and thus, in the contention-based random access procedure, when the multiple access UE sends a random access collision, according to the UE Determining, by the UE, the UE identifier in the cell after accessing the target cell, or using the at least one third message or the selected at least one second message that is determined by the UE side The UE identity in the cell monitors the fourth message.

In the present embodiment, as shown in FIG. 19, the apparatus 1900 further includes a transmitting unit (not shown) for transmitting at least one first message to the network side. Wherein, when multiple first messages are sent, the multiple first messages are sent at the same time or sent at different times. The specific transmission manner is as described in Embodiments 1 and 3, and details are not described herein again.

In this embodiment, the sending unit uses the different frequency resources or different pilots of the same frequency resource to simultaneously send the multiple first messages; or multiple random access channels (RACH) at different times before the scheduled time arrives. The transmission opportunity sends the plurality of first messages.

In this embodiment, the apparatus 1900 further includes a determining unit (not shown), the determining unit is configured to determine the number of the first message, where determining the number (number/number) of the first message sent by the UE For details, refer to Embodiment 1, and details are not described herein again.

In this embodiment, the apparatus 1900 further includes an information acquiring unit (not shown) for receiving the network device, the SS block, and/or the transmitting beam and the first message resource and/or the random access preamble configured on the network side. Or the resource occupied by the second message, or the scrambling sequence, or the mapping relationship of the random access wireless network temporary identifier, and/or the matching And a mapping relationship between the resource occupied by the second message and the first message resource and/or the random access preamble, and/or an indication for indicating the UE identity in the cell after the access target cell is determined by the UE side or by the network side Information, and/or configuring a second message reception quality threshold, and/or configuring a reception quality threshold for the first message.

A user equipment is also provided in this embodiment, and the user equipment is configured with a random access device 1900 as described above.

FIG. 20 is a schematic diagram showing the structure of a user equipment according to an embodiment of the present invention. As shown in FIG. 20, user equipment 2000 can include a central processing unit (CPU) 2001 and a memory 2002; and memory 2002 is coupled to central processing unit 2001. The memory 2002 can store various data; in addition, a program for data processing is stored, and the program is executed under the control of the central processing unit 2001 for random access.

In one embodiment, the functionality of device 1900 can be integrated into central processor 2001. The central processing unit 2001 may be configured to implement the random access method described in Embodiment 7.

For example, the central processing unit 2001 may be configured to: receive a plurality of second messages returned by the network side according to the first message sent by the user equipment (UE).

For other configurations of the central processing unit 2001, reference may be made to Embodiment 7, and details are not described herein again.

In another embodiment, the above device 1900 can be configured separately from the central processing unit 2001. For example, the device 1900 can be configured as a chip connected to the central processing unit 2001, such as the random access unit shown in FIG. The control of device 2001 implements the functionality of device 1900.

In addition, as shown in FIG. 20, the user equipment 2000 may further include: a communication module 2003, an input unit 2004, a display 2006, an audio processor 2005, an antenna 2007, a power source 2008, and the like. The functions of the above components are similar to those of the prior art, and are not described herein again. It should be noted that the user equipment 2000 does not have to include all the components shown in FIG. 20; in addition, the user equipment 2000 may also include components not shown in FIG. 20, and reference may be made to the prior art.

Example 9

The embodiment of the present invention provides a random access method, which is applied to a device side, such as a network device side, in response to a random access procedure initiated by a user equipment.

21 is a flowchart of a random access method according to Embodiment 9 of the present invention. As shown in FIG. 21, the method includes:

Step 2101: Return multiple second messages to the UE according to the at least one first message received from the UE.

According to the foregoing embodiment, the network device may return multiple second messages according to the random access procedure initiated by the UE, so that the UE performs a subsequent random access procedure according to the multiple second messages, thereby improving random access of the UE. The probability of success reduces the random access delay of the UE.

In this embodiment, the information included in the second message is as described in Embodiment 1, and details are not described herein again.

In this embodiment, the method may further include:

Step 2100 (optional), receiving at least one first message sent by the UE, for example, receiving a plurality of first messages sent by a user equipment (UE), or receiving a first message sent by the UE in a non-single random access preamble format, or Receiving, by the UE, at least one first message sent by the configured random access resource, where the multiple network devices are configured with the random access resource;

In this embodiment, the non-single random access preamble format of step 2100 is as described in Embodiment 1, and the step 2101 is as described in the first to sixth cases described in Embodiment 1, and details are not described herein again.

In this embodiment, the method further includes: configuring, for the UE, the network device, the SS block, and/or the transmit beam and the first message resource and/or the random access preamble, or the resource occupied by the second message, or the scrambling sequence Or a mapping relationship of the wireless network temporary identifiers; and/or a mapping relationship between the resources occupied by the second message and the first message resource and/or the random access preamble; and/or configured to indicate by the UE side or Determining, by the network side, indication information of a user identifier in a cell after accessing the target cell; and/or configuring a second message reception quality threshold; and/or configuring a reception quality threshold of the first message. Specifically, it is as described in Embodiment 1, and details are not described herein again.

In this embodiment, after step 2101, the method may further include: receiving at least one third message sent by the UE; the third message includes a UE identifier, and/or a receiving quality of the corresponding second message, and/or Or the UE identifier in the cell after accessing the target cell, and/or the third message sending quantity indication information, for example, directly indicating the number (number/number) of sending the third message, or indicating whether the third message is a UE The last third message sent.

In this embodiment, after receiving the third message, the method may further include: sending a fourth message to the UE, where the fourth message indicates at least the UE in the cell after the access target cell determined by the UE side or the network side. The identifier, that is, at least indicating whether the UE is successfully accessed; or the fourth message indicates at least the UE identifier in the cell after the access target cell determined by the UE side or the network side, and the UE identifier included in the received third message, At least Indicates whether the UE is successfully accessed. Therefore, in the contention-based random access procedure, when a random access collision is sent by multiple UEs, the accessed UE may be determined according to the UE identifier, where the access target cell is utilized. The UE identifier in the latter cell scrambles the fourth message, and sends the scrambled fourth message. For the specific transmission mode, refer to Embodiment 2, and details are not described herein again.

In this embodiment, the method may further include: randomly determining a UE identifier in a cell as a UE identifier in a cell after accessing the target cell; or, according to at least one information in the third message, and/or a network side The receiving quality and/or the number of the third message determines the UE identity in one cell as the UE identity in the cell after accessing the target cell. In this embodiment, the UE identifier in the cell after the target cell is determined may be referred to in Embodiment 2, and details are not described herein again.

In this embodiment, the method may further include: determining a resource for sending the fourth message; for a specific implementation manner, reference may be made to Embodiment 2, and details are not described herein again.

In this embodiment, when the network device can exchange information with other network devices, when the plurality of network devices receive the plurality of third messages sent by the UE, the method further includes: sending, to a node determined by the network side The third message or the third message sent by the other network device on the receiving network may be referred to the embodiment 2, and details are not described herein again.

Example 10

The embodiment 10 provides a network device. The method for solving the problem is similar to the method of the embodiment 9. Therefore, the specific implementation may be implemented by referring to the method of the embodiment 9.

Figure 22 is a diagram showing the random access device of the tenth embodiment. As shown in FIG. 22, the device 2200 includes: a second sending unit 2201, where the second sending unit 2201 is configured to return multiple second messages to the UE according to the at least one first message received from the UE.

In this implementation, the apparatus may further include: a third receiving unit 2205, configured to receive at least one first message sent by a user equipment (UE), where the method includes receiving a plurality of first messages sent by the UE, or receiving the UE The first message sent by the non-single random access preamble format or the at least one first message sent by the UE on the configured random access resource, where the plurality of network devices are configured with the random access resource.

In this embodiment, the information included in each second message is as described in Embodiment 1-4, and details are not described herein again.

In this embodiment, as shown in FIG. 22, the device 2200 further includes a second receiving unit 2202, where the second receiving unit 2202 is configured to receive at least one third message sent by the UE; the third message includes information, such as an embodiment. 1 is not described here.

In this embodiment, as shown in FIG. 22, the device 2200 further includes:

a third sending unit 2204, where the third sending unit 2204 is configured to send a fourth message to the UE, where the fourth message indicates at least the UE identifier in the cell after the access target cell determined by the UE side or the network side, that is, at least the indication Whether the UE successfully accesses; or the fourth message indicates at least the UE identifier in the cell after the access target cell determined by the UE side or the network side, and the UE identifier included in the received third message, to indicate at least whether the UE is The access is successful. Therefore, in the contention-based random access procedure, when a random access collision is sent by multiple UEs, the accessed UE may be determined according to the UE identifier.

In this embodiment, as shown in FIG. 22, the device 2200 further includes:

The scrambling unit 2203 is configured to scramble the fourth message by using the UE identifier in the cell after accessing the target cell; the third sending unit 2204 sends the scrambled fourth message to the UE, where For details, refer to Embodiment 2, and details are not described herein again.

a first determining unit (not shown), configured to randomly determine a UE identifier in one cell as a UE identifier in a cell after accessing the target cell; or, according to at least one information in the third message, and/or a network side The receiving quality and/or the number of the third message determines the UE identity in one cell as the UE identity in the cell after the access target cell.

In this embodiment, the apparatus 2200 may further include a configuration unit (not shown) configured to configure the network device, the SS block, and/or the transmit beam with the first message resource and/or the random access preamble, or the second message a mapping relationship between a resource, or a scrambling sequence, or a random access wireless network temporary identifier; and/or a mapping relationship between the resource occupied by the second message and the first message resource and/or the random access preamble; and/or configuration And indication information for indicating a user identifier in a cell after accessing the target cell by the UE side or by the network side; and/or configuring a second message reception quality threshold; and/or configuring a reception quality threshold of the first message, where For details, refer to Embodiments 1 and 2, and details are not described herein again.

In this embodiment, a network device is further provided, where the network device is configured with a random access device as described above. 2200.

FIG. 23 is a schematic diagram showing the structure of a base station according to an embodiment of the present invention. As shown in FIG. 23, the base station 2300 can include a central processing unit (CPU) 2301 and a memory 2302; the memory 2302 is coupled to the central processing unit 2301. The memory 2302 can store various data; in addition, a program for data processing is stored, and the program is executed under the control of the central processor 2301 for random access.

In one embodiment, the functionality of device 2200 can be integrated into central processor 2301. The central processing unit 2301 can be configured to implement the random access method described in Embodiment 9.

For example, the central processor 2301 can be configured to return a plurality of second messages to the UE based on the at least one first message received from the user equipment (UE).

For other configurations of the central processing unit 2301, refer to Embodiment 9, and details are not described herein again.

In another embodiment, the above device 2200 can be configured separately from the central processing unit 2301. For example, the device 2200 can be configured as a chip connected to the central processing unit 2301, such as the random access unit shown in FIG. The control of the device 2301 implements the functions of the device 2200.

In addition, as shown in FIG. 23, the base station 2300 may further include: a transceiver 2303, an antenna 2304, and the like; wherein the functions of the foregoing components are similar to the prior art, and details are not described herein again. It should be noted that the base station 2300 does not have to include all of the components shown in FIG. 23; in addition, the base station 2300 may also include components not shown in FIG. 23, and reference may be made to the prior art.

Example 11

The embodiment 11 further protects a communication system including at least one network device and user equipment on the network side; the user equipment transmits at least one first message to the network side; each of each network device on the network side The network device receives the at least one first message sent by the UE, and returns a corresponding multiple second message according to the first message; and the user equipment further receives the second message returned from the network side.

The configuration of the user equipment and the network device is as described in Embodiment 8 and Embodiment 10. The workflow of the system is as shown in Embodiments 1-3, 7, and 9. The content of the user equipment is incorporated herein, and details are not described herein. .

Example 12

The embodiment of the present invention provides a random access method, which is applied to a device side that initiates a random access procedure to a network side, such as a user equipment side.

Figure 24 is a flowchart of a random access method according to Embodiment 12 of the present invention. As shown in Figure 24, it includes:

Step 2401: The user equipment (UE) sends at least one first message to the network side.

Through this step, the UE initiates a random access procedure, which may be a contention based random access procedure or a non-contention based random access procedure.

In this embodiment, the method may further include a step (not shown): determining the number (number/number of transmissions) of transmitting the first message, or receiving the number of the first message (the number of the first message) indicated by the network side For the specific implementation of the method, reference may be made to Embodiment 1, and details are not described herein again.

In this embodiment, when multiple first messages are sent, the multiple first messages are sent at the same time or at different times.

In this embodiment, different frequency resources may be used or different first preambles of the same frequency resource may be used to simultaneously send the multiple first messages; or

A plurality of random access channel (RACH) transmission opportunities at different times before the scheduled time arrives to transmit the plurality of first messages.

In this embodiment, for the non-contention based random access procedure, the resource that sends a first message does not have an intersection or the intersection of resources that send multiple first messages.

In this embodiment, the method may further include: listening to the plurality of second messages after sending the at least one first message, wherein, during the monitoring of the second message, sending or not sending the first message, the specific The embodiment is as described in Embodiment 1, and details are not described herein again.

In this embodiment, after the UE monitors and receives multiple second messages returned by the network side, the method may further include: (not shown): selecting at least one second message from the plurality of second messages, according to The selected at least one second message sends at least one third message (Msg.3) and listens to and receives the fourth message returned by the network side according to the third message. For the specific implementation manner, reference may be made to Embodiment 1 Narration.

In this embodiment, the specific information of the first message, the second message, the third message, and the fourth message is as described in Embodiment 1, and details are not described herein again.

Example 13

The embodiment 13 provides a random access device. The principle of the device is similar to that of the embodiment 12, and the specific implementation may refer to the implementation of the method in the embodiment 12. Description.

Figure 25 is a schematic diagram of a random access apparatus according to Embodiment 13 of the present invention. As shown in Figure 25, it includes:

The fourth sending unit 2501, the user equipment (UE) thereof sends at least one first message to the network side.

Thus, the UE initiates a random access procedure, which may be a contention based random access procedure or a non-contention based random access procedure.

In this embodiment, the apparatus may further include a step (not shown): a determining unit configured to determine the number (number/number of transmissions) of transmitting the first message, or to receive the first indication sent by the network side The number of the messages (the number of times/the number of times of the transmission) and the resource for the first message are determined. For the specific implementation, reference may be made to Embodiment 1, and details are not described herein again.

In this embodiment, when transmitting the plurality of first messages, the fourth sending unit 2501 transmits the same time or sends the plurality of first messages at different times.

In this embodiment, for the non-contention based random access procedure, the resource set that sends a first message does not have an intersection or the intersection of the resource set that sends the multiple first messages.

In this embodiment, the apparatus may further include: a listening unit (not shown) that listens to the plurality of second messages after the fourth sending unit 2501 sends the at least one first message, wherein the second message is being monitored The fourth sending unit 2501 sends or does not send the first message. The specific implementation is as described in Embodiment 1, and details are not described herein again.

In this embodiment, the apparatus may further include: (not shown): a selecting unit, configured to select at least one second message from the plurality of second messages, the fifth sending unit, according to the selected at least one The second message is sent to the at least one third message (Msg. 3) and the receiving unit is configured to receive the fourth message that is returned by the network side according to the third message. For the specific implementation manner, reference may be made to Embodiment 1, and details are not described herein again.

In this embodiment, specific information of the first message, the second message, the third message, and the fourth message is implemented. As described in Example 1, it will not be described here.

A user equipment is also provided in this embodiment, and the user equipment is configured with a random access device 2500 as described above.

FIG. 26 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. As shown in FIG. 26, user equipment 2600 can include a central processing unit (CPU) 2601 and a memory 2602; and a memory 2602 coupled to central processing unit 2601. The memory 2602 can store various data; in addition, a program for data processing is stored, and the program is executed under the control of the central processing unit 2601 for random access.

In one embodiment, the functionality of device 1000 can be integrated into central processor 2601. The central processing unit 2601 can be configured to implement the random access method described in Embodiment 12.

For example, the central processor 2601 can be configured to transmit at least one first message to the network side.

For other configurations of the central processing unit 2601, refer to Embodiment 12, and details are not described herein again.

In another embodiment, the above device 2500 can be configured separately from the central processing unit 2601. For example, the device 2500 can be configured as a chip connected to the central processing unit 2601, such as the random access unit shown in FIG. The control of device 2601 implements the functionality of device 2500.

In addition, as shown in FIG. 26, the user equipment 2600 may further include: a communication module 2603, an input unit 2604, a display 2606, an audio processor 2605, an antenna 2607, a power source 2608, and the like. The functions of the above components are similar to those of the prior art, and are not described herein again. It should be noted that the user equipment 2600 does not necessarily have to include all of the components shown in FIG. 26; in addition, the user equipment 2600 may also include components not shown in FIG. 26, and reference may be made to the prior art.

Example 14

The embodiment 14 of the present invention provides a random access method, which is applied to a device side, such as a network device side, in response to a random access procedure initiated by a user equipment.

FIG. 27 is a flowchart of a random access method according to Embodiment 14 of the present invention. As shown in FIG. 27, the method includes:

Step 2701, which sends a third message to a node determined by the network side or receives a third message sent by another network device on the network side.

Before step 2701, the method may further include: step 2700, receiving user equipment (UE) according to the network At least one third message sent by the plurality of second messages returned by the network side.

In this embodiment, when the network device can exchange information with other network devices, the network side determines a node, where the node is not the network device, but one of the other network devices is independent of the network device. And a device of the other network, in step 2701, the network device delivers the received third message to the node, and the node returns a fourth message to the UE; when the network device is the node, in step 2701 The network device further receives the third message sent by the other network device, and the network device sends the fourth message according to the third message received from the UE and received from the other network device, and the specific implementation manner may refer to the implementation. Example 2, no more details here.

In this embodiment, the content of the second message and the third message is as described in Embodiment 1, and details are not described herein again.

Example 15

The embodiment 15 provides a random access device. The principle of the device is similar to that of the embodiment 14. Therefore, the specific implementation may refer to the implementation of the method in the embodiment 14. Description.

28 is a schematic diagram of a random access apparatus according to Embodiment 15 of the present invention. As shown in Figure 28, it includes:

The processing unit 2801 sends a third message to a node determined by the network side or receives a third message sent by another network device on the network side.

In this embodiment, the apparatus may further include: a receiving unit 2082, configured to receive at least one third message that is sent by the user equipment (UE) according to the multiple second messages returned by the network side.

In this embodiment, the specific implementation manner of the processing unit may refer to step 2701, and details are not described herein again.

In the embodiment, a network device is further provided, which is configured with a random access device 2800 as described above.

FIG. 29 is a schematic diagram showing the structure of a base station according to an embodiment of the present invention. As shown in FIG. 29, the base station 2900 can include a central processing unit (CPU) 2901 and a memory 2902; the memory 2902 is coupled to the central processing unit 2901. Its The memory 2902 can store various data; in addition, a program for data processing is stored, and the program is executed under the control of the central processing unit 2901 for random access.

In one embodiment, the functionality of device 2800 can be integrated into central processor 2901. The central processing unit 2901 can be configured to implement the random access method described in Embodiment 14.

For example, the central processing unit 2901 may be configured to: send a third message to one node determined by the network side or receive a third message sent by another network device on the network side.

For other configurations of the central processing unit 2901, reference may be made to Embodiment 14, and details are not described herein again.

In another embodiment, the above device 2800 can be configured separately from the central processing unit 2901. For example, the device 2800 can be configured as a chip connected to the central processing unit 2901, such as the random access unit shown in FIG. The control of device 2901 implements the functionality of device 2800.

In addition, as shown in FIG. 29, the base station 2900 may further include: a transceiver 2903, an antenna 2904, and the like; wherein the functions of the foregoing components are similar to the prior art, and details are not described herein again. It should be noted that the base station 2900 does not necessarily have to include all of the components shown in FIG. 29; in addition, the base station 2900 may also include components not shown in FIG. 29, and reference may be made to the prior art.

Example 16

Embodiment 16 of the present invention provides a random access method, which is applied to a device side, such as a network device side, in response to a random access procedure initiated by a user equipment.

FIG. 30 is a flowchart of a random access method according to Embodiment 16 of the present invention. As shown in FIG. 30, the method includes:

Step 3001: Send a fourth message to the UE according to the received at least one third message.

The fourth message indicates at least the UE identity in the cell after the access target cell determined by the UE side or the network side, that is, at least indicating whether the UE successfully accesses; or the fourth message indicates at least the UE side or the network side determines a UE identifier in a cell after accessing the target cell, and a UE identifier included in the received third message, to at least indicate whether the UE successfully accesses, and thus, in the contention-based random access process, in multiple When the random access conflict is sent by the UE, the accessed UE may be determined according to the UE identifier.

In this embodiment, the method may further include: Step 3000, receiving at least one third message sent by the UE;

After receiving the third message, the method may further include: the network device scrambling the fourth message (Msg.4) by using the UE identifier in the cell after the access target cell included in the at least one third message; In step 3001, the scrambled fourth message is sent to the UE.

For the specific scrambling mode, refer to Embodiment 2, and details are not described herein again.

In this embodiment, the method may further include: determining the UE identifier in the cell after the access target cell, and the specific determining manner may be referred to in Embodiment 2, and details are not described herein again.

The network device randomly determines the resource, or the UE identity in the cell after accessing the target cell, and/or the second message reception quality and/or the received quantity, and/or the reception quality and/or the received quantity of the third message. Determine the resource. For specific implementations, refer to Embodiment 2, and details are not described herein again.

Example 17

The embodiment 17 provides a random access device. The principle of the device is similar to the method of the embodiment 16. Therefore, the specific implementation may refer to the implementation of the method in the embodiment 16. Description.

Figure 31 is a diagram showing the random access device of the seventeenth embodiment. As shown in FIG. 31, the apparatus 3100 includes: a sending unit 3101, which sends a fourth message to the UE according to the received at least one third message.

In this embodiment, the apparatus may further include: a receiving unit 3102, receiving at least one third message sent by the UE;

After receiving the third message, the apparatus may further include: a scrambling unit (not shown), the network device scrambling the fourth message (Msg.4) by using the UE identifier in the cell after accessing the target cell; The transmitting unit 3101 transmits the scrambled fourth message to the UE.

In this embodiment, the device further includes:

a first determining unit (not shown), configured to randomly determine a UE identifier in one cell as a UE identifier in a cell after accessing the target cell; or, according to at least one information in the third message, and/or a network side The receiving quality and/or the number of the third message determines the UE identity in one cell as the UE identity in the cell after the access target cell. a second determining unit (not shown), configured to determine a resource for transmitting the fourth message; wherein the second determining unit randomly determines the resource, or according to a UE identifier in a cell after accessing the target cell, and/ Or the second message reception quality and/or the received quantity, and/or the reception quality and/or the received quantity of the third message determine the resource. For specific implementations, refer to Embodiment 2, and details are not described herein again.

In the embodiment, a network device is further provided, and the network device is configured with a random access device 3100 as described above.

Figure 32 is a block diagram showing the structure of a base station according to an embodiment of the present invention. As shown in FIG. 32, the base station 3200 can include a central processing unit (CPU) 3201 and a memory 3202; the memory 3202 is coupled to the central processing unit 3201. The memory 3202 can store various data; in addition, a program for data processing is stored, and the program is executed under the control of the central processing unit 3201 to perform random access.

In one embodiment, the functionality of device 3100 can be integrated into central processor 3201. The central processing unit 3201 can be configured to implement the random access method described in Embodiment 16.

For example, the central processor 3201 can be configured to transmit a fourth message to the UE according to the received at least one third message.

For other configurations of the central processing unit 3201, refer to Embodiment 16, and details are not described herein again.

In another embodiment, the device 3100 may be configured separately from the central processing unit 3201. For example, the device 3100 may be configured as a chip connected to the central processing unit 3201, such as the random access unit shown in FIG. The control of device 3201 implements the functionality of device 3100.

In addition, as shown in FIG. 32, the base station 3200 may further include: a transceiver 3203, an antenna 3204, and the like; wherein the functions of the foregoing components are similar to those of the prior art, and details are not described herein again. It should be noted that the base station 3200 does not necessarily have to include all of the components shown in FIG. 32; in addition, the base station 3200 may also include components not shown in FIG. 32, and reference may be made to the prior art.

Example 18

Embodiment 18 of the present invention provides a random access method, which is applied to a device side that initiates a random access procedure to a network side, such as a user equipment side.

FIG. 33 is a flowchart of a random access method according to Embodiment 18 of the present invention. As shown in FIG. 33, the method includes:

Step 3301: Receive a fourth message returned by the network side according to the received at least one third message. The fourth message indicates at least the UE identity in the cell after the access target cell determined by the UE side or the network side, that is, at least indicating whether the UE successfully accesses; or the fourth message indicates at least the UE side or the network side determines a UE identifier in a cell after accessing the target cell, and a UE identifier included in the received third message, to at least indicate whether the UE successfully accesses, and thus, in the contention-based random access process, in multiple When the random access conflict is sent by the UE, the accessed UE may be determined according to the UE identifier.

In this embodiment, the method further includes: Step 3300, sending at least one third message to the network side.

In this embodiment, the specific implementation manners of the step 3300 and the step 3301 can refer to the steps 101-102 of the embodiment 1, and details are not described herein again.

In this way, after the UE receives the fourth message, if the UE confirms the successful access, the UE may use the UE identifier in the cell corresponding to the scrambling sequence used by the fourth message as the access target cell. Identification, for uplink and downlink data transmission.

Example 19

The embodiment 19 provides a random access device. The principle of the device is similar to that of the embodiment 19, and the specific implementation may refer to the implementation of the method in the embodiment 18, and the content is the same. Description.

FIG. 34 is a schematic diagram of a random access device according to Embodiment 19 of the present invention. As shown in FIG. 34, the device 3400 includes a receiving unit 3401, which receives a fourth message returned by the network side according to the received at least one third message. The fourth message indicates at least the UE identity in the cell after the access target cell determined by the UE side or the network side, that is, at least indicating whether the UE successfully accesses; or the fourth message indicates at least the UE side or the network side determines a UE identifier in a cell after accessing the target cell, and a UE identifier included in the received third message, to at least indicate whether the UE successfully accesses, and thus, in the contention-based random access process, in multiple Random transmission by the UE When an access conflict occurs, the accessed UE may be determined according to the UE identifier.

In this embodiment, the apparatus may further include: a sending unit 3402 that sends at least one third message to the network side.

In this embodiment, the specific implementation manners of the sending unit 3402 and the receiving unit 3401 can refer to steps 101-102 of Embodiment 1, and details are not described herein again.

A user equipment is also provided in this embodiment, and the user equipment is configured with a random access device 3400 as described above.

FIG. 35 is a schematic diagram showing the structure of a user equipment according to an embodiment of the present invention. As shown in FIG. 35, user device 3500 can include a central processing unit (CPU) 3501 and a memory 3502; and memory 3502 is coupled to central processor 3501. The memory 3502 can store various data; in addition, a program for data processing is stored, and the program is executed under the control of the central processing unit 3501 for random access.

In one embodiment, the functionality of device 3400 can be integrated into central processor 3501. The central processing unit 3501 can be configured to implement the random access method described in Embodiment 18.

For example, the central processing unit 3501 can be configured to: receive a fourth message returned by the network side according to the received at least one third message.

For other configurations of the central processing unit 3501, refer to Embodiment 18, and details are not described herein again.

In another embodiment, the above device 3400 can be configured separately from the central processing unit 3501. For example, the device 3400 can be configured as a chip connected to the central processing unit 3501, such as the random access unit shown in FIG. The control of device 3501 implements the functionality of device 3400.

In addition, as shown in FIG. 35, the user equipment 3500 may further include: a communication module 3503, an input unit 3504, a display 3506, an audio processor 3505, an antenna 3507, a power source 3508, and the like. The functions of the above components are similar to those of the prior art, and are not described herein again. It should be noted that the user equipment 3500 does not necessarily have to include all of the components shown in FIG. 35; in addition, the user equipment 3500 may also include components not shown in FIG. 35, and reference may be made to the prior art.

The embodiment of the present invention further provides a computer readable program, wherein the program causes the random access device or user equipment to perform the embodiments 1, 7, 12 when the program is executed in a random access device or a user equipment , the random access method described in 18.

The embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes a random access device or a user equipment to perform the random access method described in Embodiments 1, 7, 12, and 18 .

Embodiments of the present invention also provide a computer readable program, wherein the program causes the random access device or network device to perform Embodiment 2, 9 when the program is executed in a random access device or a network device base station , 14, 16 the random access method.

An embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes a random access device or a network device to perform the random access method described in Embodiments 2, 9, 14, and .

The above apparatus and method of the present invention may be implemented by hardware or by hardware in combination with software. The present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps. The present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

The random access method in the random access device described in connection with the embodiments of the present invention may be directly embodied as hardware, a software module executed by a processor, or a combination of both. For example, one or more of the functional block diagrams shown in Figures 13-16, 19-20, 22-23, 25-26, 28-29, 31-32, 34-35 and/or one of the functional block diagrams Multiple combinations may correspond to individual software modules of a computer program flow, or may correspond to individual hardware modules. These software modules may correspond to the respective steps shown in Figures 1-12, 18, 21, 24, 27, 30, 33, respectively. These hardware modules can be implemented, for example, by curing these software modules using a Field Programmable Gate Array (FPGA).

The software module can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. A storage medium can be coupled to the processor to enable the processor to read information from, and write information to, the storage medium; or the storage medium can be an integral part of the processor. The processor and the storage medium can be located in an ASIC. The software module can be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if a device (such as a mobile terminal) uses a larger capacity The MEGA-SIM card or a large-capacity flash memory device can be stored in the MEGA-SIM card or a large-capacity flash memory device.

One or more of the functional block diagrams described in Figures 13-16, 19-20, 22-23, 25-26, 28-29, 31-32, 34-35 and/or one or more combinations of functional blocks May be implemented as a general purpose processor, digital signal processor (DSP), application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate, or for performing the functions described herein. Transistor logic device, discrete hardware component, or any suitable combination thereof. One or more of the functional block diagrams described in Figures 13-16, 19-20, 22-23, 25-26, 28-29, 31-32, 34-35 and/or one or more combinations of functional blocks It can also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP, or any other such configuration.

The present invention has been described in connection with the specific embodiments thereof, and it should be understood by those skilled in the art that A person skilled in the art can make various modifications and changes to the invention in accordance with the principles of the invention, which are also within the scope of the invention.

Supplementary note 1. A random access device comprising:

The first receiving unit is configured to receive a plurality of second messages returned by the network side according to the first message sent by the user equipment (UE).

The device of claim 1, wherein the device further comprises:

a first selection unit, configured to select at least one second message from the plurality of second messages.

The device of claim 1, wherein the device further comprises:

a first sending unit, configured to send at least one third message according to the selected second message.

The device of claim 3, wherein the device further comprises:

The first listening unit is configured to monitor a fourth message returned by the network device.

Appendix 5, a random access device, comprising:

And a second sending unit, configured to return one or more second messages to the UE according to the at least one first message received from the user equipment (UE).

The device of claim 5, wherein the device further comprises:

And a second receiving unit, configured to receive the at least one third message sent by the UE.

The device of claim 6, wherein the device further comprises:

a third sending unit, configured to send a fourth message to the UE according to the received at least one third message.

The device of claim 5, wherein the device further comprises:

And a third receiving unit, configured to receive the at least one first message sent by the user equipment (UE).

Supplementary note 9, a communication system, comprising: a user equipment and at least one network device on the network side; wherein

The user equipment (UE) sends at least one first message to the network side;

Each of the network devices receives the at least one first message sent by the UE, and returns a corresponding multiple second message according to the first message;

And the user equipment further receives a plurality of second messages returned from the network side.

Supplementary note 10: A random access device, wherein the device comprises:

a first sending unit, configured to send at least one first message to the network side.

The device of claim 10, wherein, when transmitting the plurality of first messages, the first transmitting unit transmits the plurality of first messages at the same time or at different times.

The device of claim 11, wherein the second transmitting unit simultaneously transmits the plurality of first messages by using different frequency resources or using different preambles of the same frequency resource; or

The device of claim 10, wherein, for the non-contention based random access procedure, the resource set for transmitting the one first message does not have an intersection or existence with a resource set for transmitting the plurality of first messages Intersection.

The device of claim 10, wherein the device further comprises a first determining unit, configured to send the first according to network side configuration indication information and/or UE side condition determination The number of a message.

The device of claim 14, wherein the UE side condition comprises one or more of the following conditions: UE capability, UE type, UE priority, downlink measurement result, random access trigger event.

The device of claim 10, wherein the device further comprises a first listening unit, wherein the first monitoring unit is configured to monitor the plurality of second after transmitting the at least one first message Message.

Supplementary note 17. The apparatus of claim 16, wherein the first transmitting unit transmits or does not transmit the first message during the listening of the second message.

Supplementary note 18: A random access device, wherein the device comprises:

And a processing unit, configured to send a third message to a node determined by the network side or receive a third message sent by another network device on the network side.

Supplementary note 19: A random access device, wherein the device comprises:

And a fourth receiving unit, configured to receive a fourth message returned by the network side according to the received at least one third message.

Supplementary note 20: A random access device, wherein the device comprises:

And a second sending unit, configured to send a fourth message to the UE according to the received at least one third message.

Claims

A random access device comprising:

And a first sending unit, configured to send the at least one third message according to the multiple second messages returned by the network side.
The apparatus of claim 1 further comprising:

a first receiving unit, configured to receive the multiple second messages returned by the network side according to a first message sent by a user equipment (UE).
The apparatus of claim 1 wherein each of said second messages comprises at least one of the following information:

Time calibration/advance information, UE identity in the cell, first message resource indication information, random access preamble indication information, uplink resource scheduling information of the third message, backoff indication information, reception quality indication information of the first message, network Device indication information, synchronization block (SS block), and/or transmit beam indication information.
The apparatus of claim 1 wherein each of said third messages comprises:

The UE identity, and/or the reception quality of the corresponding second message, and/or the UE identity in the cell after accessing the target cell, and/or the third message transmission quantity indication information.
The apparatus of claim 1 wherein said apparatus further comprises:

a first selection unit, configured to select at least one second message from the plurality of second messages;

And the first sending unit sends the at least one third message according to the at least one second message selected by the first selecting unit.
The apparatus according to claim 5, wherein said first selection unit is configured to randomly select at least one second message from said plurality of second messages; or, according to at least one of the second messages, and/or Or selecting at least one second message for the reception quality and/or the number of reception of the second message.
The device according to claim 1 or 5, wherein the device further comprises:

a first intercepting unit, configured to monitor a fourth message returned by the network side, where the UE identifier determined by the UE side is used in the cell after accessing the target cell, or the used and sent The UE identifier in the corresponding cell of the at least one third message or the selected at least one second message listens to the fourth message.
The device of claim 2, the device further comprising:

And a second sending unit, configured to send the at least one first message to the network side.
The apparatus of claim 1 wherein said apparatus further comprises:

An information acquiring unit, configured to receive a network device configured by the network side, an SS block, and/or a transmit beam and a first message resource and/or a random access preamble, or a resource occupied by the second message, or scrambled a sequence, or a mapping relationship for the identification of the scrambling sequence calculation, and/or a mapping relationship between the resource occupied by the second message configured by the network side and the first message resource and/or the random access preamble, and/or for Indicates, by the UE side or by the network side, indication information of the UE identity in the cell after accessing the target cell, and/or a reception quality threshold of the second message, and/or a reception quality threshold of the configuration first message.
A random access device comprising:

And a second receiving unit, configured to receive at least one third message that is sent by the user equipment (UE) according to the multiple second messages returned by the network side.
The device of claim 10, wherein the device further comprises:

And a third sending unit, configured to return one or more second messages to the UE according to the at least one first message received from the UE.
The apparatus of claim 10 wherein each of said second messages comprises at least one of the following information:

Time calibration/advance information, UE identity in the cell, first message resource indication information, random access preamble indication information, uplink resource scheduling information of the third message, backoff indication information, reception quality indication information of the first message, network Device indication information, SS block, and/or transmit beam indication information.
The apparatus of claim 10 wherein each of said third messages comprises:

The UE identity, and/or the reception quality of the corresponding second message, and/or the UE identity in the cell after accessing the target cell, and/or the third message transmission quantity indication information.
The device of claim 10, wherein the device further comprises:

a configuration unit, configured to configure a network device, an SS block, and/or a transmit beam with a first message resource and/or a random access preamble, or a resource occupied by the second message, or a scrambling sequence, or for adding a mapping relationship of the identifiers of the scrambling sequence calculation; and/or configuring a mapping relationship between the resources occupied by the second message and the first message resource and/or the random access preamble; and/or configured to indicate that the UE side or the network side determines The indication information of the UE identifier in the cell after accessing the target cell; and/or the reception quality threshold of the second message is configured; and/or the first message is configured. Receive quality threshold.
The device of claim 10, wherein the device further comprises:

a fourth sending unit, configured to send a fourth message to the UE according to the received at least one third message, where the fourth message indicates at least the access target cell determined by the UE side or the network side The UE identifier in the following cell, or at least the UE identifier in the cell after the access target cell determined by the UE side or the network side, and the UE identifier included in the received third message.
The apparatus of claim 15 wherein said apparatus further comprises:

a scrambling unit, configured to scramble the fourth message by using a UE identifier in a cell after the access target cell;

And the fourth sending unit is configured to send the scrambled fourth message to the UE.
The apparatus according to claim 16, wherein the apparatus further comprises a first determining unit, wherein the first determining unit is configured to randomly determine a UE identifier in a cell as a UE identifier in a cell after accessing the target cell; Or determining, according to at least one information in the third message, and/or the receiving quality and/or quantity of the third message on the network side, the UE identifier in one cell as the UE identifier in the cell after accessing the target cell.
The apparatus of claim 15, wherein the apparatus further comprises a second determining unit, the second determining unit configured to determine a resource for transmitting the fourth message; wherein the second determining unit randomly determines Determining the resource, or according to the UE identity in the cell after accessing the target cell, and/or the receiving quality and/or the received quantity of the second message, and/or the receiving quality and/or the receiving quantity of the third message. .
The device of claim 10, wherein the device further comprises:

And a third receiving unit, configured to receive the at least one first message sent by the user equipment.
A communication system includes a user equipment and at least one network device on the network side; wherein

The user equipment (UE) sends at least one third message to the network side according to multiple second messages returned by the network side;

The at least one network device on the network side receives the at least one third message.