WO2019062582A1

WO2019062582A1 - Information acquisition method and terminal

Info

Publication number: WO2019062582A1
Application number: PCT/CN2018/106039
Authority: WO
Inventors: 范强; 娄崇; 黄曲芳
Original assignee: 华为技术有限公司
Priority date: 2017-09-28
Filing date: 2018-09-17
Publication date: 2019-04-04
Also published as: CN109587811A; CN109587811B

Abstract

An information acquisition method and terminal, the method comprising: if a terminal detects a first random access response (RAR), which is transmitted by an access network element and which comprises an identifier of a first preamble, between a first time and a second time, determining to end requesting first information by means of a random access procedure; the first time is a time at which the terminal triggers requesting N pieces of information by means of the random access procedure, or a time at which the terminal determines to request the first information again by means of the random access procedure; the first information is one piece of information from among the N pieces of information, N being an integer greater than 0; the first preamble is a preamble that is used for requesting the first information, and the second time is a start time for the terminal sending the first preamble; the terminal receiving the first information that is transmitted by the access network element.

Description

Information acquisition method and terminal

This application claims the priority of the Chinese Patent Application, filed on Sep. 28, 2017, filed on Jan. 28,,,,,,,,,,,,,,,,,,,,,,, .

Technical field

The present application relates to the field of communications technologies, and in particular, to an information acquiring method and a terminal.

Background technique

In the future New Radio (NR) system, System Information (SI) is divided into the most basic system information (MSI) and other system information required by the terminal to access the network. System information, OSI). The MSI is periodically transmitted by the network, and the OSI is triggered by the network or triggered by the request of the terminal. For a terminal in an idle state or an inactive state, on-demand system information (On-Demand SI) can be requested by initiating a random access procedure. The request process may be based on message 1 (Msg1) or based on message 3 (Msg3).

The terminal sends a preamble corresponding to the requested SI, that is, Msg1, on the physical random access channel (PRACH) in the Msg1-based request process; the access network element receives the After the preamble, a random access response (RAR) including information is sent to the terminal. The terminal monitors a physical downlink control channel (PDCCH) in a random access response (RAR) time window to receive the RAR for a fixed period of time after the preamble is sent. If the RAR of the access network element is not received in the RAR time window, or the received RAR does not have the identifier of the preamble sent by the terminal, it is considered that the requesting the required system information fails; the terminal is waiting for a period of time. After the time, the random access procedure is re-initiated. If the terminal receives the RAR including the identifier of the preamble, it is determined that the access network element will send the SI corresponding to the preamble.

In the above process, each time the terminal requests system information, it needs to wait for a long time to determine whether the system information required for the request is successful, resulting in low efficiency of requesting system information.

Summary of the invention

The present application provides an information acquisition method and a terminal for improving the efficiency of requesting information by a terminal.

In a first aspect, an embodiment of the present application provides an information acquiring method, where the method includes:

If the first RAR that includes the identifier of the first preamble transmitted by the access network element is detected, the terminal determines to end the requesting the first information by using the random access procedure.

The first time is a time when the terminal triggers requesting N pieces of information through a random access procedure, or determines, for the terminal, a time for requesting first information by using a random access procedure, where the first information is One of the N pieces of information; N is an integer greater than 0; the first preamble is a preamble for requesting the first information, and the second time is the first preamble sent by the terminal The start time of the code;

The terminal receives the first information transmitted by the access network element.

Through the foregoing method, the terminal starts to monitor whether the access network element transmits the first RAR at the first time before sending the first preamble, so that when the first RAR is monitored, it is determined that the access network element will transmit the first The first information corresponding to the preamble can skip the process of requesting the first information by using the random access procedure, and directly wait for the access network element to transmit the first information. Through the above process, the terminal reduces the time overhead required to request the first information, and improves the efficiency of requesting the first information.

In an optional implementation manner, after the determining ends the requesting the first information by using the random access procedure, the method further includes:

The terminal determines that the first preamble is not sent to the access network element.

In an optional implementation manner, the method includes:

Sending, by the terminal, the first preamble to the access network element if the first RAR is not monitored between the first time and the second time;

If the terminal listens to the first RAR in the third time to the fourth time, it determines that the first information is successfully requested by the random access procedure;

The third time is a start time of sending, by the terminal, the first preamble; and the fourth time is a start time of an RAR window corresponding to the first preamble.

After the first preamble is sent, the terminal starts to listen to the first RAR at the third time, so that when the first RAR is monitored, it is determined that the access network element will transmit the first preamble corresponding to the first preamble. The first information, so that the random access procedure for requesting the first information can be ended in advance, and waiting for the access network element to transmit the first information. Through the above process, the terminal reduces the time overhead required to request the first information, and improves the efficiency of requesting the first information.

In a second aspect, an embodiment of the present application provides an information acquiring method, where the method includes:

The terminal sends a first preamble to the access network element;

If the terminal listens to the first random access response (RAR) including the identifier of the first preamble in the third time to the fourth time, determining that the first information is successfully requested by the random access procedure;

The first information is one of the N pieces of information; N is an integer greater than 0; the first preamble is a preamble for requesting the first information, and the third time is The start time of the first preamble is sent by the terminal; the fourth time is a start time of the RAR window corresponding to the first preamble;

Through the foregoing method, the terminal starts to listen to the first RAR at the third time while transmitting the first preamble, so that when the first RAR is monitored, it is determined that the access network element will transmit the first corresponding to the first preamble. The information can be used to terminate the random access procedure for requesting the first information in advance, and wait for the access network element to transmit the first information. Through the above process, the terminal reduces the time overhead required to request the first information, and improves the efficiency of requesting the first information.

In an optional implementation manner, the method further includes:

If the terminal does not listen to the first RAR transmitted by the network element of the access network between the third time and the fourth time, the terminal monitors in the RAR window corresponding to the first preamble a second RAR, where the second RAR is an RAR sent by the access network element after receiving the first preamble sent by the terminal.

In an optional implementation manner, N is an integer greater than 1, and the method further includes:

If the terminal detects the third RAR that includes the identifier of the second preamble transmitted by the network element of the access network between the first time and the fifth time, the terminal determines to not send the network element to the access network element. The second preamble; the fifth time is any time after the first time and before the end time of the RAR window corresponding to the first preamble.

The second preamble is a preamble for requesting the second information, and the second information is any one of the N pieces of information except the first information.

Through the foregoing method, the terminal starts to monitor whether the access network element transmits the third RAR at the first time before sending the second preamble, so that when the third RAR is monitored, it is determined that the access network element will transmit the third The second information corresponding to the second preamble can skip the process of requesting the second information by using the random access procedure, and wait for the access network element to transmit the second information. Through the above process, the terminal reduces the time overhead required to request the second information, and improves the efficiency of requesting the second information.

In an alternative embodiment, N is an integer greater than one;

The first information is the information with the highest priority among the K pieces of information, and the K pieces of information are the information that the terminal needs to obtain in the N pieces of information; the priority is configured by the network element of the access network. , or the priority is preset; N is greater than or equal to K;

Or the first information is determined by the terminal by the radio resource control RRC entity of the terminal and indicated to the media access control MAC entity of the terminal;

Or the first information is determined by the terminal by the MAC entity of the terminal;

Or the first information is determined by the terminal by the application layer entity of the terminal, and is indicated to the MAC entity of the terminal.

In an optional implementation manner, after the terminal determines to end requesting the first information by using a random access procedure or determining that the first information is successfully requested by the random access procedure, the method further includes:

The terminal notifies the RRC entity of the terminal by the MAC entity of the terminal, and the access network element transmits the first information.

In an optional implementation manner, after the terminal receives the first information that is transmitted by the access network element, the method further includes:

The terminal notifies the MAC entity of the terminal by the RRC entity of the terminal to terminate the random access procedure for requesting the first information by using the first preamble.

In a third aspect, an embodiment of the present application provides a terminal, including:

a processing unit, configured to: after receiving, by the transceiver unit, the first random access response RAR that includes the identifier of the first preamble transmitted by the access network element between the first time and the second time, determining to end The random access procedure requests the first information;

The transceiver unit is configured to receive the first information that is transmitted by the access network element.

In an optional implementation manner, after the determining ends the request of the first information by using a random access procedure, the processing unit is further configured to:

Determining that the first preamble is no longer sent to the access network element.

In an optional implementation manner, the transceiver unit sends the first preamble to the access network element if the first RAR is not monitored between the first time and the second time;

The processing unit, if the first RAR is monitored by the transceiver unit in the third time to the fourth time, determining that the first information is successfully requested by the random access procedure;

In a fourth aspect, the embodiment of the present application provides a terminal, including:

a transceiver unit, configured to send a first preamble to the access network element;

a processing unit, configured to, if the first random access response (RAR) including the identifier of the first preamble is detected, in a third time to a fourth time, determine that the first information is successfully requested by using a random access procedure;

In an optional implementation manner, the transceiver unit is further configured to:

Listening to the second RAR in the RAR window corresponding to the first preamble if the first RAR transmitted by the access network element is not monitored between the third time and the fourth time The second RAR is an RAR that is sent by the access network element after receiving the first preamble sent by the terminal.

In an optional implementation manner, N is an integer greater than 1, and the processing unit is further configured to:

If the third RAR including the identifier of the second preamble transmitted by the access network element is detected by the transceiver unit between the first time and the fifth time, determining that the access network is no longer available to the access network Transmitting the second preamble; the fifth time is any time after the first time and before the end time of the RAR window corresponding to the first preamble.

In an alternative embodiment, N is an integer greater than one;

In an optional implementation manner, after the determining ends requesting the first information by using a random access procedure or determining that the first information is successfully requested by the random access procedure, the processing unit is further configured to:

Notifying the RRC entity of the terminal by a MAC entity of the terminal, the access network element transmitting the first information.

In an optional implementation manner, after the receiving the first information that is transmitted by the access network element, the processing unit is further configured to:

Notifying, by the RRC entity of the terminal, that the MAC entity of the terminal terminates the random access procedure for requesting the first information by using the first preamble.

In a fifth aspect, an embodiment of the present application provides a communication method, where the method includes:

Receiving, by the terminal, a random access response RAR from the access network element; the RAR includes duration indication information, where the duration indication information is used to indicate that the transmission duration of the message 3 is long;

The terminal sends the message 3 according to the duration indication information.

In an optional implementation manner, the duration indication information is located in an uplink grant field of the RAR.

In an optional implementation manner, the transmission duration is the number of symbols occupied by the message 3, or the length of time that the message 3 lasts during transmission.

In a sixth aspect, the embodiment of the present application provides a communication method, where the method includes:

The terminal receives the first message from the access network element; the first message includes duration indication information, where the duration indication information is used to indicate the duration of transmission of the second message; the first message is system information; The second message is any one of the following messages: message 3 in the random access procedure; paging message sent by the access network element; single-site point-to-multipoint SC-PTM message; system information; semi-persistent Scheduling SPS messages;

The terminal receives or sends the second message according to the duration indication information.

In an optional implementation manner, the duration indication information is located in downlink control information DCI of the first message.

In an optional implementation manner, the duration of the transmission is the number of symbols occupied by the second message, or the length of time that the second message lasts during transmission.

In a seventh aspect, the embodiment of the present application provides a terminal, where the method includes:

a transceiver unit, configured to receive a random access response RAR from the access network element; the RAR includes duration indication information, where the duration indication information is used to indicate that the transmission duration of the message 3 is long;

And a processing unit, configured to send the message 3 by using the transceiver unit according to the duration indication information.

In an eighth aspect, the embodiment of the present application provides a terminal, including:

a transceiver unit, configured to receive a first message from an access network element; the first message includes duration indication information, where the duration indication information is used to indicate a duration of transmission of the second message; the first message is a system The second message is any one of the following: a message 3 in a random access procedure; a paging message sent by the access network element; a single-cell point-to-multipoint SC-PTM message; Information; semi-persistent scheduling of SPS messages;

And a processing unit, configured to receive or send the second message by using the transceiver unit according to the duration indication information.

In a ninth aspect, the embodiment of the present application provides a computer readable storage medium, where the computer storage medium stores computer readable instructions, and when the computer reads and executes the computer readable instructions, causes the computer to execute any of the foregoing Aspect or any of the possible methods in any of the aspects.

In a tenth aspect, the embodiment of the present application provides a computer program product, when the computer reads and executes the computer program product, causing the computer to perform the method in any of the above aspects or any of the possible designs.

In an eleventh aspect, an embodiment of the present application provides a chip, where the chip is connected to a memory, for reading and executing a software program stored in the memory, to implement any one of the foregoing aspects or any one of the foregoing aspects. Possible methods in design.

DRAWINGS

1 is a schematic diagram of a contention random access procedure in the prior art;

2 is a schematic flowchart of a method for acquiring information according to an embodiment of the present application;

3(a) to 3(b) are schematic diagrams of monitoring time provided by an embodiment of the present application;

4(a) to 4(b) are schematic diagrams of monitoring time provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of a listening time according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a listening time according to an embodiment of the present application;

FIG. 7 is a schematic flowchart of a communication method according to an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a random access response according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a random access response according to an embodiment of the present disclosure;

FIG. 10 is a schematic flowchart of a communication method according to an embodiment of the present application;

FIG. 11 is a schematic flowchart of a communication method according to an embodiment of the present application;

12(a) to 12(d) are schematic diagrams showing the structure of a message according to an embodiment of the present application;

FIG. 13 is a schematic structural diagram of a terminal according to an embodiment of the present application;

FIG. 14 is a schematic structural diagram of a terminal according to an embodiment of the present application;

FIG. 15 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure;

FIG. 16 is a schematic structural diagram of a terminal according to an embodiment of the present application.

Detailed ways

The present application will be further described in detail below with reference to the accompanying drawings.

The embodiments of the present application can be applied to various mobile communication systems, for example, a New Radio (NR) system (also referred to as a 5G system), a Long Term Evolution (LTE) system, and an advanced long term evolution (Advanced long term). Evolution, LTE-A) systems, other evolved Long Term Evolution (eLTE) systems, and other mobile communication systems.

Hereinafter, some of the terms in the present application will be explained to be understood by those skilled in the art.

1) A terminal, also called a User Equipment (UE), is a device that provides voice and/or data connectivity to a user, for example, a handheld device with a wireless connection function, an in-vehicle device, and the like. Common terminals include, for example, mobile phones, tablets, notebook computers, PDAs, mobile internet devices (MIDs), wearable devices such as smart watches, smart bracelets, pedometers, and the like.

2) The access network element may be an ordinary base station (such as a Node B or an eNB), may be a new radio controller (NR controller), or may be a gNode B (gNB) in a 5G system. It is a centralized network unit (Centralized Unit), which may be a new wireless base station, and may be a radio remote unit, which may be a micro base station, may be a relay, may be a distributed network element, or may be a receiving unit. A Transmission Reception Point (TRP) or a Transmission Point (TP) or any other wireless access device, but the embodiment of the present application is not limited thereto.

3), message 3 (Msg3), the message sent by the terminal to the base station in step 3 of the random access procedure. The Msg3 may be an L2 message or an L3 message, the L2 message may be a Media Access Control (MAC) control cell, and the L3 message may be an RRC message (RRC Connection Setup Request, or RRC Connection Re-establishment, etc.).

As shown in FIG. 1 , it is a schematic diagram of a contention random access procedure in the prior art.

S101: The terminal sends a random access preamble (preamble) to the base station, where the preamble is sent on a physical random access channel (Physical Random Access Channel, PRACH). This message can also be called message 1 (Msg1).

S102: The base station returns a random access response (RAR) message to the terminal.

This message can also be referred to as Message 2 (Msg2).

S103: The terminal sends Msg3 to the base station, and the Msg3 may be an L2 message or an L3 message.

The L2 message may be a MAC Control Cell, and the L3 message may be a message such as an RRC Connection Setup Request message or an RRC Connection Re-establishment message.

S104: The base station feeds back the contention resolution message to the terminal, where the message may be an RRC message (such as RRC connection establishment, etc.), and the message may also be referred to as message 4 (Msg4).

In the NR system currently under discussion, the terminal may request on-Demand system information from the access network element through a random access procedure. In the present invention, the information that the terminal can request from the access network element through the random access procedure is not limited to information such as system information.

As shown in FIG. 2, a schematic flowchart of an information acquisition method provided by an embodiment of the present application is shown. The method includes:

Step 201: If the first random access response (RAR) including the identifier of the first preamble transmitted by the access network element is monitored, the terminal determines to end the random access process. Request the first message.

The first time is a time when the terminal triggers requesting N pieces of information through a random access procedure, or determines, for the terminal, a time for requesting first information by using a random access procedure, where the first information is One of the N pieces of information; N is an integer greater than 0; the first preamble is a preamble for requesting the first information, and the second time is the first preamble sent by the terminal The start time of the code.

It should be noted that the terminal is a terminal that is in an idle state or an inactive state.

As described above, in the embodiment of the present application, any one of the N pieces of information may be information such as system information. Further, any one of the N pieces of information may be other system information. , OSI).

Step 202: The terminal receives the first information that is transmitted by the access network element.

In step 201, when the terminal determines that the request information is required, the radio resource control (RRC) entity of the terminal may trigger the medium access control (MAC) entity of the terminal to initiate a random access process, and the terminal may N preambles for requesting the N pieces of information, time-frequency resources for transmitting a first preamble for requesting first information, and the like are determined.

Optionally, when N is greater than 1, the terminal may first determine the first information from the N pieces of information. In a first possible implementation manner, the terminal may determine, as the first information, the information with the highest priority among the K pieces of information, where the K pieces of information are information that the terminal needs to obtain in the N pieces of information, where N is greater than or Equal to K. The priority may be configured by the access network element. For example, the access network element may broadcast the most basic system information (MSI) including the priority of the N pieces of information. Therefore, the priority of the N pieces of information is configured; the priority may also be preset, that is, pre-agreed between the terminal and the access network element.

In a second possible implementation, the first information is determined by the terminal by the RRC entity of the terminal and indicated to the media access control MAC entity of the terminal.

In a third possible implementation manner, the first information is determined by the terminal by the MAC entity of the terminal.

In a fourth possible implementation manner, the first information is determined by the terminal by the application layer entity of the terminal, and is indicated to the MAC entity of the terminal.

In the embodiment of the present application, in order to improve the efficiency of acquiring information by the terminal, the terminal may start monitoring whether the access network element transmits the N information after triggering the time for requesting the N pieces of information through the random access procedure. one or more. The process of monitoring the terminal can be divided into different time segments. The following describes the first information requested by the terminal as an example:

First, the terminal may monitor whether the access network element transmits the first RAR including the identifier of the first preamble between the first time and the second time. The length of time between the first time and the second time may also be referred to as a first time window.

For example, as shown in FIG. 3(a), a schematic diagram of listening time provided by an embodiment of the present application. In FIG. 3(a), the first time is a time when the terminal triggers the N information to be requested by the random access procedure, and the second time is the start time of the first preamble sent by the terminal, that is, the first time The start time of the duration of the preamble transmission.

Of course, FIG. 3(a) is only an example, and the first time may be located at any time after the terminal triggers the time for requesting N pieces of information through the random access procedure, and before the time when the terminal sends the first preamble; The time may be after the first time and at any time before the time at which the terminal transmits the first preamble. For example, as shown in FIG. 3(b), the first time is after the time when the terminal triggers the N information through the random access procedure, and the second time is before the time when the terminal sends the first preamble, and the first time window Can be as shown in Figure 3 (b).

Optionally, if the terminal has previously sent the first preamble to the access network element, the access network element does not send the second RAR corresponding to the first preamble to the terminal, that is, the terminal If the first information fails to be requested by the first preamble, the first information may be re-initiated, and the first time may be determined by the terminal to re-request the first through the random access procedure. The time of the information. The first time may also determine, after the time when the terminal requests the first information by the random access procedure again, and before the time when the terminal sends the first preamble.

In the process, if the terminal listens to the first RAR that includes the identifier of the first preamble transmitted by the network element of the access network between the first time and the second time, it may determine that the terminal does not need to connect to the The network access network element sends a first preamble for requesting the first information, so that the first information may be requested by the random access procedure. At this time, the terminal notifies the RRC entity of the terminal by the MAC entity of the terminal, and the access network element transmits the first information.

Certainly, the terminal may continue to send the first preamble to the access network element, which is not limited in this embodiment of the present application.

It should be noted that the first RAR monitored by the terminal is not a response message of the access network element to the first preamble sent by the terminal, but a response message to the preamble sent by the other terminal. In the embodiment of the present application, one information may correspond to at least one preamble. Therefore, when the terminal determines that the first RAR that is monitored includes the identifier of the preamble corresponding to the first information, it may be determined that the other terminal is also requesting the first information. Moreover, the access network element is ready to transmit the first information, and the terminal can no longer send the first preamble to the access network element. Optionally, after the first RAR is monitored between the first time and the second time, the terminal may determine to request the second information from the access network element, and send a second preamble for requesting the second message. . The second information is any one of the N pieces of information except the first information.

In the process, the terminal sends the first RAR including the identifier of the first preamble transmitted by the access network element to the access network element if the first RAR transmitted by the access network element is not monitored between the first time and the second time. Sending the first preamble.

While transmitting the first preamble, the terminal may monitor whether the access network element transmits the first RAR including the identifier of the first preamble between the third time and the fourth time. The length of time between the third time and the fourth time may also be referred to as a second time window. The third time is a start time of sending, by the terminal, the first preamble; and the fourth time is a start time of an RAR window corresponding to the first preamble. The RAR window is a period of time after the first preamble is sent by the terminal, and the second network RAR corresponding to the first preamble is sent to the terminal. For details, refer to the description in the prior art, and details are not described herein again.

For example, as shown in FIG. 4(a), a schematic diagram of monitoring time provided by an embodiment of the present application. In FIG. 4(a), the first time is a time when the terminal triggers the N information by using the random access procedure, and the third time is the start time of the first preamble sent by the terminal, that is, the first time The start time of the duration of the preamble transmission, and the fourth time is the start time of the RAR window corresponding to the first preamble.

Of course, FIG. 4(a) is only an example, and the third time may be after the time when the terminal sends the first preamble and is located at any time before the start time of the RAR window; the fourth time may be after the third time. And at any time before the start time of the RAR window. For example, as shown in FIG. 4(b), the third time may be after the time when the terminal sends the first preamble, and the fourth time may also be before the start time of the RAR window, where the second time window may be as shown in FIG. 4 (b) is shown.

It should be noted that, in the LTE system, in the random access process, after the terminal sends the preamble, the time after the start of a fixed time interval is taken as the start time of the RAR window. The start time of the fixed time interval is an end time of a subframe in which the preamble is transmitted, and the length of the fixed time interval is an integer multiple of a subframe length, so the RAR window always starts at a subframe boundary. . In NR, the start time of the fixed time interval is the end time of the symbol of the transmitted preamble, and the length of the fixed time interval is an integer of the symbol length or the length of the subframe of the carrier receiving the RAR. Times. Since the NR supports the symbol lengths of the uplink and downlink carriers in one cell to be different, the end position of the fixed time interval may fall inside the symbol/subframe of the carrier in which the terminal receives the RAR.

Referring to FIG. 5, in the embodiment of the present application, after the terminal transmits the current symbol of the preamble on the first carrier, the terminal waits for the S symbol or the subframe or the transmission time interval (TTI) duration of the second carrier. After a fixed time interval, if it is determined that the end time of the fixed time interval is aligned with the symbol or subframe or TTI boundary of the second carrier, the end time of the fixed time interval is determined as the start time of the RAR window, otherwise the fixed time interval will be included. The symbol of the end time or the end time of the subframe or TTI is determined as the start time of the RAR window. The second carrier is a carrier that receives the RAR by the terminal, and S is a positive integer greater than 0, and S is a preset value, which is determined according to actual conditions.

The first carrier and the second carrier may be an uplink carrier and a downlink carrier configured for one cell, or may be an uplink carrier and a downlink carrier configured for different cells. Optionally, the first carrier and the second carrier may be an uplink bandwidth (BWP) and a downlink bandwidth configured for one cell, or may be an uplink portion bandwidth and a downlink portion bandwidth configured for different cells.

If the terminal listens to the first RAR in the third time to the fourth time, it determines that the first information is successfully requested through the random access procedure, so that the first information may be requested to be requested through the random access procedure. At this time, the terminal notifies the RRC entity of the terminal by the MAC entity of the terminal, and the access network element transmits the first information, and determines that the random access procedure ends.

Correspondingly, if the terminal does not listen to the first RAR transmitted by the access network element in the third time to the fourth time, the RAR corresponding to the first preamble The second RAR is monitored in the window, and the second RAR is the RAR sent by the access network element after receiving the first preamble sent by the terminal.

If the terminal does not detect the second RAR in the RAR window, the terminal may determine that the first information fails by requesting the random access procedure, and may re-request the first information by initiating a random access procedure. Of course, at this time, the terminal may also initiate a random access procedure to request the second information. The second information is any one of the N pieces of information except the first information.

It should be noted that, when the terminal requests the first information by re-initiating the random access procedure, the preamble used may be the same as the preamble used to request the first information, or may be different. Not limited. For example, the last time the terminal uses the preamble identifier of the preamble 34 to request the access network element to send the first information, and when the first information is requested again by initiating the random access procedure, the terminal may use the identifier of the preamble as 38. The preamble requests the access network element to send the first information.

In summary, the terminal can start listening to the RAR including the identifier of the first preamble before transmitting the first preamble. If the MAC entity of the terminal listens to the RAR including the identifier of the first preamble before transmitting the first preamble, the first preamble may not be transmitted. If the terminal transmits the first preamble but listens to the RAR including the identifier of the first preamble before the RAR window corresponding to the first preamble (ie, the window in which the terminal receives the second RAR), the first preamble may not be present. The monitor monitors the second RAR in the corresponding RAR window. If the terminal receives the RAR before the end of the RAR window corresponding to the first preamble, it may be determined that the first information is successfully requested by the random access procedure. In the embodiment of the present application, once the MAC entity of the terminal receives the RAR of the identifier of the first preamble in the following three cases, it indicates that the first information is successfully requested through the random access procedure:

Case 1: The terminal listens (ie, receives) the RAR including the identifier of the first preamble in the first time window, and may not send the first preamble at this time.

Case 2: The terminal listens (ie, receives) the RAR including the identifier of the first preamble in the second time window, and the second time window is located before the start of the RAR window corresponding to the first preamble.

Case 3: The terminal sends the first preamble, and receives the RAR including the identifier of the first preamble in the RAR window corresponding to the first preamble.

Further, when N is greater than 1, the terminal determines to stop the third RAR including the identifier of the second preamble transmitted by the access network element between the first time and the fifth time. The access network element sends the second preamble, and the terminal notifies the RRC entity of the terminal by using the MAC entity of the terminal, where the access network element is to transmit the second preamble corresponding to the The second information, thereby determining that the second information is not required to be requested by the random access procedure; the second preamble is a preamble for requesting the second information, and the second information is the N pieces of information Any one of the information other than the first information. The fifth time is any time after the first time and before the end time of the RAR window corresponding to the first preamble.

It should be noted that the third RAR monitored by the terminal is a response message of the second preamble sent by the access network element to other terminals.

For example, as shown in FIG. 6, a schematic diagram of monitoring time provided by an embodiment of the present application. In FIG. 6, the first time is a time when the terminal triggers the N information by using a random access procedure, and the fifth time is an end time of the RAR window corresponding to the first preamble. Of course, FIG. 6 is only an example, and the fifth time may also be located at the time when the terminal transmits the first preamble, or the fifth time may be located at the start time of the RAR window or the like.

In step 202, after the terminal receives the first information that is transmitted by the access network element, the terminal may notify the MAC entity of the terminal to terminate the first preamble by using an RRC entity of the terminal. Requesting a random access procedure of the first information. The reason that the RRC entity of the terminal indicates that the MAC entity of the terminal receives the first information may be that the terminal listens to the first information in the sending period of the first information, or the UE monitors the Remaining Minimum System Information (RMSI). And the RMSI includes an indication of the transmission of the first information.

It should be noted that the access network element transmits the first information by means of a broadcast.

An indication method for the duration of message transmission is also provided in the embodiment of the present application, which will be described in detail below.

FIG. 7 is a schematic flowchart of a communication method according to an embodiment of the present application.

Referring to Figure 7, the method includes:

Step 701: The access network element receives the preamble sent by the terminal.

Step 702: The access network element sends an RAR to the terminal according to the preamble; the RAR includes duration indication information, where the duration indication information is used to indicate the duration of transmission of the message 3.

The duration of the transmission may also be referred to as a transport block duration.

In the embodiment of the present application, the duration indication information may be a single field in the RAR, for example, as shown in FIG. 8. In FIG. 8 , the RAR includes a MAC sub-header, a duration indication information, a Tracking Area Code (TAC), an uplink (UP) grant field, and the like, which are not illustrated one by one.

The duration indication information may also be located in an uplink grant field of the RAR. For example, as shown in FIG. 9, the RAR includes a MAC sub-header, a Tracking Area Code (TAC), an uplink (UP) grant field, and the like, which are not illustrated one by one. The uplink authorization field includes duration indication information.

In the embodiment of the present application, the duration indication information may be a specific value of the duration of the transmission. For example, the duration of the transmission is 10 μs, and the duration indication information may be 10. After receiving the duration indication information, the terminal may determine that the transmission duration of the message 3 is 10 μs according to the value of the duration indication information. It should be noted that the time unit indicated by the duration indication information for the duration of the transmission may be pre-agreed, and details are not described herein again.

The duration indication information may also be an index value corresponding to the duration of the transmission. For example, the duration of the transmission is 10 μs, and the corresponding index value is 1, and the duration indication information may be 1. After receiving the duration indication information, the terminal may determine that the transmission duration of the message 3 is 10 μs according to the value of the duration indication information. It should be noted that the correspondence between the duration of the transmission and the index value may be pre-agreed between the terminal and the network element of the access network, that is, preset, or the network element of the access network may be configured by using system information.

The duration of the transmission may also be the number of symbols occupied by the message 3. For example, the message 3 occupies 2 symbols, and the duration indication information may be 2. After receiving the duration indication information, the terminal may determine that the transmission duration of the message 3 is 2 symbols in length according to the value of the duration indication information. Of course, the length of the symbol may be the length of the symbol in the carrier or bandwidth portion of the message 3, or the length of the symbol in the reference carrier or reference bandwidth portion.

Step 703: The terminal receives the RAR from the access network element. The RAR includes the duration indication information, where the duration indication information is used to indicate the duration of the transmission of the message 3.

Step 704: The terminal sends the message 3 according to the duration indication information.

Optionally, in the embodiment of the present application, the duration of the transmission of the message 3 may also be pre-agreed, and the duration indication information may not be included in the RAR. The specific embodiment of the present application is not limited.

It should be noted that the terminal may retransmit the message 3. When the terminal retransmits the message 3, the terminal may determine the duration of the transmission of the message 3 by using the indication information in the system information, or may determine the message 3 according to the duration indication information in the RAR. The duration of the transmission may be as long as the duration of the transmission of the message 3, and the duration of the transmission is not limited. The implementation of the indication information in the system information may be the same as the implementation manner of the duration indication information in the RAR. For details, refer to the foregoing description, and details are not described herein.

FIG. 10 is a schematic flowchart diagram of a communication method provided by an embodiment of the present application.

Referring to Figure 10, the method includes:

Step 1001: The terminal receives the first message from the access network element. The first message includes duration indication information, where the duration indication information is used to indicate that the transmission duration of the second message is long.

The first message is system information; the system information may be an OSI, or may be an MSI or the like.

The second message is any one of the following messages: a message 3 in a random access procedure; a paging message sent by the access network element; and a single cell point-to-multipoint (Single Cell-Point To Multipoint) , SC-PTM) message; system information; Semi-Persistent Scheduling (SPS) message.

Step 1002: The terminal receives or sends the second message according to the duration indication information.

Specifically, when the second message is sent by the terminal, the second message of the transmission duration indicated by the duration indication information is sent according to the duration indication information; and when the terminal receives the second message, according to the duration indication information, Receiving a second message of the transmission duration indicated by the duration indication information.

Optionally, the duration indication information is located in Downlink Control Information (DCI) of the first message.

In the embodiment of the present application, the duration indication information may be a specific value of the duration of the transmission. For example, the duration of the transmission is 10 μs, and the duration indication information may be 10. After receiving the duration indication information, the terminal may determine that the transmission duration of the second message is 10 μs according to the value of the duration indication information. It should be noted that the time unit indicated by the duration indication information for the duration of the transmission may be pre-agreed, and details are not described herein again.

The duration indication information may also be an index value corresponding to the duration of the transmission. For example, the duration of the transmission is 10 μs, and the corresponding index value is 1, and the duration indication information may be 1. After receiving the duration indication information, the terminal may determine that the transmission duration of the second message is 10 μs according to the value of the duration indication information. It should be noted that the correspondence between the duration of the transmission and the index value may be pre-agreed between the terminal and the network element of the access network, that is, preset, or the network element of the access network may be configured by using system information.

The duration of the transmission may also be the number of symbols occupied by the second message. For example, the second message occupies 2 symbols, and the duration indication information may be 2. After receiving the duration indication information, the terminal may determine, according to the value of the duration indication information, that the transmission duration of the second message is 2 symbols. The length of the symbol may be the length of the symbol in the carrier or bandwidth part of the second message, the length of the symbol in the reference carrier or the reference bandwidth part, or the carrier or bandwidth of the first message. The length of the symbol in the section, etc.

Optionally, in the embodiment of the present application, the duration of the transmission of the second message may also be pre-agreed, and the duration indication information may not be included in the first message. The specific embodiment of the present application is not limited.

Optionally, in the embodiment of the present application, the first message may also be the same message as the second message, that is, any one of the messages described above.

When the terminal requests the on-demand information based on the Msg3 request process, the response returned by the access network element is carried in Msg4. If the method of using Msg4 to resolve conflicts in LTE is adopted, only one terminal can resolve the conflict successfully at a time. The information requested by the terminal that is successfully resolved by the conflict may be the same as the information requested by other terminals. At this time, the terminal that fails to resolve other conflicts will initiate an unnecessary Msg3-based request process to continue requesting the information. To this end, the embodiment of the present application provides a communication method to solve the above problem.

FIG. 11 is a schematic flowchart diagram of a communication method provided by an embodiment of the present application.

Referring to Figure 11, the method includes:

Step 1101: The access network element generates conflict resolution indication information, where the conflict resolution indication information is used to indicate whether the request of the access network element for the P information is successfully received; P is an integer greater than 0.

The information may be an SI. Further, the information may be an OSI or the like.

The conflict resolution indication information may be a bit bitmap, each of the P information corresponding to at least one bit in the conflict resolution indication information, and the value of the bit corresponding to each information indicates Whether the request for this information was received successfully.

The conflict resolution indication information is a bit bitmap including M bits, each bit corresponding to a request for information, and when the bit value is 1, it indicates that the information corresponding to the bit is successfully received; the bit value is When it is 0, it indicates that the information request corresponding to the bit has failed to be received. The value of M in this embodiment is not specifically limited. Of course, the above is only a schematic, and the correspondence between the bit value and the information request corresponding to the bit is successfully determined, and may be determined according to the time situation, and details are not described herein again.

In this scenario, if two terminals send messages 3 (different beams) on the same resource, and the information requested by the two terminals is different, as long as the access network element can correctly solve the two terminals in two The message 3 sent by the beam can set the bit corresponding to the requested information carried in the message 3 to 1. Optionally, the conflict resolution indication information may not only indicate whether the information request carried in the message 3 of the terminal that includes the conflict resolution success is successfully received, but also whether the request corresponding to the other one or more information of the access network element is received. success.

It should be noted that the correspondence between each information and the bits in the bitmap may be pre-agreed by the terminal and the access network element, or may be determined by other means, such as by notifying the system information of the access network element. Terminal, no longer repeat here.

Step 1102: The access network element sends a message 4, where the message 4 includes a DCI, and the DCI includes the conflict resolution indication information.

Optionally, only the DCI is included in the message 4, and the data part is not included.

Optionally, the DCI is scrambled by using a preset Radio Network Temporary Identifier (RNTI). The preset RNTI may be a different RNTI than the RNTI (for example, TC-RNTI) that is commonly used by the access network element.

The message 4 including the conflict resolution indication information can be transmitted simultaneously with the conventional message 4 addressed by the Temporary Cell Radio Network Temporary Identifier (RNTI, TC-RNTI). The terminal monitors the physical downlink control channel (PDCCH) of the physical layer by using the TC-RNTI and the preset RNTI in the message 4 window, and considers that the conflict resolution is successful as long as any response message of any format is received. .

After receiving the conflict resolution indication information, the terminal may determine, according to the conflict resolution indication information, whether the message 3 sent by the terminal is successfully received.

In another possible implementation manner, the message 4 sent by the access network element may include a MAC Control Element (CE), and the conflict resolution indication information is located in the MAC CE.

In another possible implementation, the message 4 sent by the network element of the access network follows the terminal conflict resolution MAC CE in the LTE system, that is, the logical channel index in the MAC sub-head corresponding to the MAC CE in the message 4 (Logical Channel) InDex, LCID) is the same as the LCID corresponding to the terminal conflict resolution MAC CE in LTE, and the DCI of Message 4 is scrambled by TC-RNTI.

The payload of the MAC CE in the message 4 contains the content in the message 3 sent by the terminal, and the MAC header is required to indicate the length of the MAC CE through the 'L' field.

Optionally, the payload of the MAC CE in the message 4 includes the content in the message 3, but is not multiplexed with other MAC service data units (SDUs), and does not require the MAC header to indicate the MAC CE through the 'L' field. length.

Optionally, the payload of the MAC CE in the message 4 contains the content in the message 3 and padding to 48 bits.

In another possible implementation manner, the message 4 sent by the network element of the access network follows the terminal conflict resolution MAC CE in the LTE system, that is, the LCID in the MAC sub-head corresponding to the MAC CE in the message 4 conflicts with the terminal in the LTE. The LCID corresponding to the solution MAC CE is the same, and the DCI of the message 4 can be scrambled as follows:

Scrambling mode 1: The special RNTI is used for scrambling. All the terminals that initiate the request process based on the message 3 take the special RNTI to monitor whether there is a corresponding DCI. The special RNTI shown may be any RNTI other than the TC-RNTI.

Scrambling mode 2: Scrambling with TC-RNTI.

Meanwhile, the conflict resolution indication information may be included in the message 4. The conflict resolution indication information may be located in the MAC CE.

In the embodiment of the present application, a MAC sub-header structure of the message 4 for random access collision resolution is also provided.

The MAC header structure of the message 4 for random access collision resolution sent by the access network element may be as shown in FIG. 12(a) to FIG. 12(d). The LCID (00001) indicates the logical channel ID corresponding to the SRB1, but is not limited to the logical channel and the signalling radio bearer 1 (SRB1) indicating that the MAC SDU (DCCH) is derived from the LCID (00001).

As shown in Fig. 12 (a) to Fig. 12 (d), R represents a reserved bit.

E is used to indicate whether more fields are included in the MAC header. When E is set to '1', it means that the 'R/F2/E/LCID' field will be followed; when E is set to '0', it means The next byte begins with a MAC SDU, or a MAC control cell, or padding.

F indicates the size of the L field. When the length indicated by the L field is less than 128 bytes, the F field is set to 0, otherwise it is set to 1.

L indicates the length of the corresponding MAC SDU, or the length of the variable length MAC control cell, and the length indicated by the L field is in bytes.

The LCID (11111) indicates that the payload field corresponding to the MAC subheader is padding.

The LCID (11100) indicates that the payload field corresponding to the MAC sub-header is a UE Contention Resolution Identity.

The first byte of the MAC subheader shown in Figure 12(a) is used for padding, and the last two bytes respectively indicate that the subsequent MAC payload includes the terminal collision resolution ID MAC Control Cell and the MAC SDU from the DCCH logical channel.

The first byte and the second byte of the MAC subheader shown in FIG. 12(b) are used for padding, and the third byte and the fourth byte indicate that the subsequent MAC payload includes the terminal collision resolution identifier MAC control cell. And the MAC SDU from the DCCH logical channel.

The first byte of the MAC subheader shown in FIG. 12(c) corresponds to the terminal collision resolution identifier MAC control cell in the MAC payload, and the second and third bytes of the MAC subheader correspond to the DCCH logical channel from the MAC payload. MAC SDU, where the length of the MAC SDU from the DCCH logical channel does not exceed 128 bytes. The fourth byte of the MAC subheader corresponds to the padding in the MAC payload.

The first byte of the MAC subheader shown in FIG. 12(d) corresponds to the terminal collision resolution identifier MAC control cell in the MAC payload, and the second and third and fourth bytes of the MAC subheader are corresponding to the MAC payload. The MAC SDU of the DCCH logical channel, where the length of the MAC SDU from the DCCH logical channel exceeds 128 bytes. The fifth byte of the MAC subheader corresponds to the padding in the MAC payload.

In the embodiment of the present application, a conflict resolution solution is also provided, which is described in detail below.

After successfully receiving the message 3 in which the same TC-RNTI is scrambled, the access network element delivers the message 4 scrambled by the TC-RNTI for each terminal.

The terminal continuously monitors whether there is a message 4 with or without TC-RNTI scrambling before receiving the contention resolution timer (mac-ContentionResolutionTimer) of the message 4 expires or stops. After the terminal listens to the TC-RNTI scrambled message 4 and successfully decodes the message 4 (not the contention resolution succeeds), it does not stop receiving the contention resolution timer of the message 4, and continues to listen to the message 4 until the contention resolution timer expires. .

Optionally, if the terminal determines that the conflict resolution succeeds according to the content in the message 4, stopping the contention resolution timer of the received message 4; if the terminal determines that the conflict resolution fails according to the content in the message 4, the terminal does not stop the contention resolution timing of the received message 4. Device.

The format of the message 4 can refer to the format described in any of the foregoing, and details are not described herein again.

In this embodiment of the present application, the MAC entity of the terminal does not perform conflict resolution, and whether to continue to initiate the next random access procedure depends on the indication of the RRC entity of the terminal.

For example, both the RRC entity of the terminal A and the RRC entity of the terminal B instruct the respective terminals to perform the following actions: send a competing preamble and request the SI based on the manner of the message 3. The SI types requested by the two terminals may be the same or different.

The MAC entity of the terminal A and the MAC entity of the terminal B select the same PRACH occasion and the same preamble, so the preamble sent by the two terminals collides, and only one of the access network elements can be detected. Therefore, the access network element sends a message 2, and both terminals receive the message 2, which is considered to be sent by the access network element, and both terminals receive the same TC-RNTI. Therefore, both terminals use the uplink resources allocated in message 2, and both send messages 3 to the access network element. Since there is no terminal identifier in the RRC message requesting the SI, the content of the message 3 sent by the two terminals may be the same or different. Specifically, if the SIs requested by the two terminals are the same, the content of the message 3 they send is the same. If the SIs requested by the two terminals are the same, the content of the message 3 they send is the same. If the uplink resources used by the two terminals are the same but are transmitted using different uplink beams, in this case, the access network element can successfully decode the message 3 sent by the two terminals. The access network element can be addressed by the TC-RNTI, and a message 4 is sent. The message 4 is an RRC message, and includes a bitmap. The bitmap is used to indicate that the access network element has received the target. Which SI sends the request. After receiving the message, the MAC layer of the terminal does not resolve the conflict, but directly sends the RRC message to the RRC entity. After receiving the RRC entity, there are three processing methods:

Processing Method 1: The RRC finds that the SIs in the message 3 generated by the RRC are all included in the bitmap of the message 4, and indicate the MAC of the terminal: the conflict resolution is successful. After the MAC is received, the conflict resolution is successful, the contention timer is stopped, and the TC-RNTI is no longer monitored.

Processing Method 2: The RRC entity determines that the SI in the sent message 3 is included in the bitmap of the message 4, and a part of the SI is not included in the bitmap of the message 4, and may indicate the MAC entity of the terminal: the conflict resolution failure. After the MAC entity receives it, it considers that the conflict resolution fails, does not stop the contention resolution timer, and continues to listen with the T-RNTI. In this case, the MAC entity of the terminal continues to initiate the second random access, and the number of times of random access is incremented by one. However, the message 3 sent in the second random access is different from the original. The message 3 sent in the second random access only contains the SI that has not been requested in the message 4 of the last random access. Request.

Processing Method 3: The RRC entity finds that none of the SIs in the message 3 generated by itself is included in the bitmap of the message 4, and indicates the MAC entity of the terminal: the conflict resolution fails. After the MAC entity receives it, it considers that the conflict resolution fails, does not stop the contention resolution timer, and continues to listen with the TC-RNTI.

In the embodiment of the present application, how to select the RACH parameter in the SI request process based on the message 3, refer to the following description:

A possible implementation manner is that a plurality of RACH parameter configurations are preset, that is, a plurality of RACH parameter configurations are pre-agreed by the terminal and the access network element, or may be included in the configuration of each RACH parameter by the access network element. One or more of the following: configuration identifier, available preamble set (only one preamble in the set), power ramping parameter, preamble maximum retransmission times, RAR window size, and timer length for receiving message 4.

Another possible implementation manner is that when the terminal has multiple parameter configurations, when the terminal needs to request SI through the SI request process based on the message 3, the RACH parameter configuration may be determined by the following method:

Method 1: After the RRC entity of the terminal selects the RACH parameter configuration, the MAC entity of the terminal is notified; the RRC entity informs the MAC entity that the RACH parameter configuration identifier may be a specific parameter configuration, such as preamble information; the terminal uses the RRC entity indication. The RACH parameter configuration is performed based on the message requesting SI request process.

Method 2: The RACH parameter configuration is selected by the MAC entity; the terminal performs the SI request process based on the message 3 using the RACH parameter configuration selected by the MAC entity.

When the terminal triggers random access due to the arrival of the uplink data, the parameter in the RACH parameter configuration may be selected for random access according to the correspondence between the access category and the RACH parameter configuration of the uplink data. The corresponding relationship between the access category of the uplink data and the RACH parameter configuration may be predefined by the protocol, or the system information is notified to the terminal, or the RRC dedicated signaling is used to notify the terminal, and details are not described herein again.

As shown in FIG. 13 , a schematic structural diagram of a terminal is provided in this embodiment of the present application.

Referring to FIG. 13, the terminal 1300 includes: a processing unit 1301 and a transceiver unit 1302.

The processing unit 1301 is configured to determine, by using the transceiver unit 1302, whether the first random access response RAR including the identifier of the first preamble transmitted by the access network element is detected between the first time and the second time. Ending requesting the first information through the random access procedure;

The transceiver unit 1302 is configured to receive the first information that is transmitted by the access network element.

In an optional implementation manner, after the determining ends the requesting the first information by using the random access procedure, the processing unit 1301 is further configured to:

In an optional implementation manner, the transceiver unit 1302 sends the first preamble to the access network element if the first RAR is not monitored between the first time and the second time. ;

The processing unit 1301 determines, by using the transceiver unit 1302, that the first RAR is detected in the third time to the fourth time, and determines that the first information is successfully requested by the random access procedure;

In an optional implementation manner, the transceiver unit 1302 is further configured to:

In an optional implementation manner, N is an integer greater than 1, and the processing unit 1301 is further configured to:

If the third RAR including the identifier of the second preamble transmitted by the access network element is detected by the transceiver unit between the first time and the fifth time, determining that the access network is no longer available to the access network Transmitting, by the element, the second preamble; the fifth time is any time after the first time, before the end time of the RAR window corresponding to the first preamble;

In an alternative embodiment, N is an integer greater than one;

In an optional implementation manner, after the determining ends requesting the first information by using a random access procedure or determining that the first information is successfully requested by the random access procedure, the processing unit 1301 is further configured to:

In an optional implementation manner, after the receiving the first information that is transmitted by the network element of the access network, the processing unit 1301 is further configured to:

As shown in FIG. 14, a schematic structural diagram of a terminal is provided in this embodiment of the present application.

Referring to FIG. 14, the terminal 1400 includes a processing unit 1401 and a transceiver unit 1402.

The transceiver unit 1402 is configured to send a first preamble to the access network element;

The processing unit 1401 is configured to, if the first random access response (RAR) including the identifier of the first preamble is detected, in a third time to a fourth time, determine that the first information is successfully requested by using a random access procedure;

The transceiver unit 1402 is configured to receive the first information that is transmitted by the access network element.

In an optional implementation manner, the transceiver unit 1402 is further configured to:

In an optional implementation manner, N is an integer greater than 1, and the processing unit 1401 is further configured to:

If the third RAR including the identifier of the second preamble transmitted by the access network element is detected by the transceiver unit 1402 between the first time and the fifth time, determining that the access network is no longer available to the access network The network element sends the second preamble; the fifth time is any time after the first time and before the end time of the RAR window corresponding to the first preamble.

In an alternative embodiment, N is an integer greater than one;

In an optional implementation manner, after the determining ends requesting the first information by using a random access procedure or determining that the first information is successfully requested by the random access procedure, the processing unit 1401 is further configured to:

In an optional implementation manner, after the receiving the first information that is transmitted by the access network element, the processing unit 1401 is further configured to:

As shown in FIG. 15, a schematic structural diagram of a terminal is provided in this embodiment of the present application.

Referring to FIG. 15, the terminal 1500 includes a processor 1501, a transceiver 1502, a memory 1503, and a communication interface 1504. The processor 1501, the transceiver 1502, the memory 1503, and the communication interface 1504 are connected to each other through a bus 1505.

The processor 1501 may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP. The processor 1501 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL), or any combination thereof.

The memory 1503 may include a volatile memory such as a random-access memory (RAM); the memory may also include a non-volatile memory such as a flash memory. A hard disk drive (HDD) or a solid-state drive (SSD); the memory 1503 may also include a combination of the above types of memories.

The communication interface 1504 can be a wired communication access port, a wireless communication interface, or a combination thereof, wherein the wired communication interface can be, for example, an Ethernet interface. The Ethernet interface can be an optical interface, an electrical interface, or a combination thereof. The wireless communication interface can be a WLAN interface.

The bus 1505 may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one double-headed arrow is shown in Figure 8, but it does not mean that there is only one bus or one type of bus.

The memory 1503 can be used to store program instructions, and the processor 1501 invokes program instructions stored in the memory 1503 to perform one or more of the steps shown in the above scheme.

The processor 1501 is configured to determine, by the transceiver 1502, the first random access response RAR that includes the identifier of the first preamble transmitted by the access network element between the first time and the second time. Ending requesting the first information through the random access procedure;

The transceiver 1502 is configured to receive the first information that is transmitted by the access network element.

In an optional implementation manner, after the determining ends to request the first information by using a random access procedure, the processor 1501 is further configured to:

In an optional implementation manner, the transceiver 1502 sends the first preamble to the access network network element if the first RAR is not monitored between the first time and the second time. ;

The processor 1501 determines that the first RAR is successfully received by the random access procedure by the transceiver 1502, if the first RAR is detected in the third time to the fourth time;

In an optional implementation manner, the transceiver 1502 is further configured to:

In an optional implementation manner, N is an integer greater than 1, and the processor 1501 is further configured to:

If the third RAR including the identifier of the second preamble transmitted by the access network element is detected by the transceiver between the first time and the fifth time, it is determined that the access network is no longer available to the access network. Transmitting, by the element, the second preamble; the fifth time is any time after the first time, before the end time of the RAR window corresponding to the first preamble;

In an alternative embodiment, N is an integer greater than one;

In an optional implementation manner, after the determining ends requesting the first information by using a random access procedure or determining that the first information is successfully requested by the random access procedure, the processor 1501 is further configured to:

In an optional implementation manner, after the receiving the first information that is transmitted by the network element of the access network, the processor 1501 is further configured to:

As shown in FIG. 16, a schematic structural diagram of a terminal is provided in this embodiment of the present application.

Referring to FIG. 16, the terminal 1600 includes: a processor 1601, a transceiver 1602, a memory 1603, and a communication interface 1604. The processor 1601, the transceiver 1602, the memory 1603, and the communication interface 1604 are connected to each other through a bus 1605. For details, refer to the description of related modules in Figure 16, and details are not described herein.

The transceiver 1602 is configured to send a first preamble to the access network element.

The processor 1601 is configured to, if the first random access response (RAR) including the identifier of the first preamble is detected, in a third time to a fourth time, determine that the first information is successfully requested by using a random access procedure;

The transceiver 1602 is configured to receive the first information that is transmitted by the access network element.

In an optional implementation manner, the transceiver 1602 is further configured to:

In an optional implementation manner, N is an integer greater than 1, and the processor 1601 is further configured to:

If the third RAR including the identifier of the second preamble transmitted by the access network element is detected by the transceiver 1602 between the first time and the fifth time, determining that the access network is no longer available to the access network The network element sends the second preamble; the fifth time is any time after the first time and before the end time of the RAR window corresponding to the first preamble.

In an alternative embodiment, N is an integer greater than one;

In an optional implementation manner, after the determining ends requesting the first information by using a random access procedure or determining that the first information is successfully requested by the random access procedure, the processor 1601 is further configured to:

In an optional implementation manner, after the receiving the first information that is transmitted by the network element of the access network, the processor 1601 is further configured to:

The RRC entity of the terminal notifies the MAC entity of the terminal to terminate the random access procedure for requesting the first information by using the first preamble.

The embodiment of the present application further provides a computer readable storage medium for storing computer software instructions required to execute the foregoing processor, which includes a program for executing the above-mentioned processor.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of the method, apparatus (system), and computer program product according to the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit and scope of the application. Thus, it is intended that the present invention cover the modifications and variations of the present invention.

Claims

An information acquisition method, characterized in that the method comprises:

If the first random access response RAR that includes the identifier of the first preamble transmitted by the access network element is detected, the terminal determines to end the request by the random access procedure. information;

The first time is a time when the terminal triggers requesting N pieces of information through a random access procedure, or determines, for the terminal, a time for requesting first information by using a random access procedure, where the first information is One of the N pieces of information; N is an integer greater than 0; the first preamble is a preamble for requesting the first information, and the second time is the first preamble sent by the terminal The start time of the code;

The terminal receives the first information transmitted by the access network element.
The method according to claim 1, wherein after the determining ends the request of the first information by the random access procedure, the method further includes:

The terminal determines that the first preamble is not sent to the access network element.
The method of claim 1 or 2, wherein the method comprises:

Sending, by the terminal, the first preamble to the access network element if the first RAR is not monitored between the first time and the second time;

If the terminal listens to the first RAR in the third time to the fourth time, it determines that the first information is successfully requested by the random access procedure;

The third time is a start time of sending, by the terminal, the first preamble; and the fourth time is a start time of an RAR window corresponding to the first preamble.
An information acquisition method, characterized in that the method comprises:

The terminal sends a first preamble to the access network element;

If the terminal listens to the first random access response (RAR) including the identifier of the first preamble in the third time to the fourth time, determining that the first information is successfully requested by the random access procedure;

The first information is one of the N pieces of information; N is an integer greater than 0; the first preamble is a preamble for requesting the first information, and the third time is The start time of the first preamble is sent by the terminal; the fourth time is a start time of the RAR window corresponding to the first preamble;

The terminal receives the first information transmitted by the access network element.
The method according to any one of claims 3 to 4, wherein the method further comprises:

If the terminal does not listen to the first RAR transmitted by the network element of the access network between the third time and the fourth time, the terminal monitors in the RAR window corresponding to the first preamble a second RAR, where the second RAR is an RAR sent by the access network element after receiving the first preamble sent by the terminal.
The method according to any one of claims 3 to 5, wherein N is an integer greater than 1, the method further comprising:

If the terminal detects the third RAR that includes the identifier of the second preamble transmitted by the network element of the access network between the first time and the fifth time, the terminal determines to not send the network element to the access network element. The second preamble; the fifth time is any time after the first time, before the end time of the RAR window corresponding to the first preamble;

The second preamble is a preamble for requesting the second information, and the second information is any one of the N pieces of information except the first information.
The method according to any one of claims 1 to 6, wherein N is an integer greater than one;

The first information is the information with the highest priority among the K pieces of information, and the K pieces of information are the information that the terminal needs to obtain in the N pieces of information; the priority is configured by the network element of the access network. , or the priority is preset; N is greater than or equal to K;

Or the first information is determined by the terminal by the radio resource control RRC entity of the terminal and indicated to the media access control MAC entity of the terminal;

Or the first information is determined by the terminal by the MAC entity of the terminal;

Or the first information is determined by the terminal by the application layer entity of the terminal, and is indicated to the MAC entity of the terminal.
The method according to any one of claims 1 to 7, wherein the method is determined after the terminal determines to end the first information by the random access procedure or determines that the first information is successfully requested by the random access procedure. Also includes:

The terminal notifies the RRC entity of the terminal by the MAC entity of the terminal, and the access network element transmits the first information.
The method according to any one of claims 1 to 8, after the terminal receives the first information transmitted by the access network element, the method further includes:

The terminal notifies the MAC entity of the terminal by the RRC entity of the terminal to terminate the random access procedure for requesting the first information by using the first preamble.
A terminal, comprising:

a processing unit, configured to: when the first random access response RAR including the identifier of the first preamble transmitted by the network element of the access network is monitored between the first time and the second time, determining to end the random access The process requests the first information;

The first time is a time when the terminal triggers requesting N pieces of information through a random access procedure, or determines, for the terminal, a time for requesting first information by using a random access procedure, where the first information is One of the N pieces of information; N is an integer greater than 0; the first preamble is a preamble for requesting the first information, and the second time is the first preamble sent by the terminal The start time of the code;

The transceiver unit is configured to receive the first information transmitted by the access network element.
The terminal according to claim 10, wherein after the determining ends the request of the first information by the random access procedure, the processing unit is further configured to:

Determining that the first preamble is no longer sent to the access network element.
The terminal according to claim 10 or 11, wherein the transceiver unit transmits the first RAR to the access network element if the first RAR is not monitored between the first time and the second time. Describe the first preamble;

The processing unit, if the first RAR is monitored by the transceiver unit in the third time to the fourth time, determining that the first information is successfully requested by the random access procedure;

The third time is a start time of sending, by the terminal, the first preamble; and the fourth time is a start time of an RAR window corresponding to the first preamble.
A terminal, comprising:

a transceiver unit, configured to send a first preamble to the access network element;

a processing unit, configured to, if the first random access response (RAR) including the identifier of the first preamble is detected, in a third time to a fourth time, determine that the first information is successfully requested by using a random access procedure;

The first information is one of the N pieces of information; N is an integer greater than 0; the first preamble is a preamble for requesting the first information, and the third time is The start time of the first preamble is sent by the terminal; the fourth time is a start time of the RAR window corresponding to the first preamble;

The transceiver unit is configured to receive the first information that is transmitted by the access network element.
The terminal according to any one of claims 12 to 13, wherein the transceiver unit is further configured to:

Listening to the second RAR in the RAR window corresponding to the first preamble if the first RAR transmitted by the access network element is not monitored between the third time and the fourth time The second RAR is an RAR that is sent by the access network element after receiving the first preamble sent by the terminal.
The terminal according to any one of claims 12 to 14, wherein N is an integer greater than 1, and the processing unit is further configured to:

If the third RAR including the identifier of the second preamble transmitted by the access network element is detected by the transceiver unit between the first time and the fifth time, determining that the access network is no longer available to the access network Transmitting, by the element, the second preamble; the fifth time is any time after the first time, before the end time of the RAR window corresponding to the first preamble;

The second preamble is a preamble for requesting the second information, and the second information is any one of the N pieces of information except the first information.
The terminal according to any one of claims 10 to 15, wherein N is an integer greater than one;

The first information is the information with the highest priority among the K pieces of information, and the K pieces of information are the information that the terminal needs to obtain in the N pieces of information; the priority is configured by the network element of the access network. , or the priority is preset; N is greater than or equal to K;

Or the first information is determined by the terminal by the radio resource control RRC entity of the terminal and indicated to the media access control MAC entity of the terminal;

Or the first information is determined by the terminal by the MAC entity of the terminal;

Or the first information is determined by the terminal by the application layer entity of the terminal, and is indicated to the MAC entity of the terminal.
The terminal according to any one of claims 10 to 16, wherein the determining unit ends the requesting of the first information by the random access procedure or determines that the first information is successfully requested by the random access procedure, the processing unit Also used for:

Notifying the RRC entity of the terminal by a MAC entity of the terminal, the access network element transmitting the first information.
The terminal according to any one of claims 10 to 17, wherein after the receiving the first information transmitted by the access network element, the processing unit is further configured to:

Notifying, by the RRC entity of the terminal, that the MAC entity of the terminal terminates the random access procedure for requesting the first information by using the first preamble.