CN111601379A - Method and apparatus for acquiring timing advance - Google Patents
Method and apparatus for acquiring timing advance Download PDFInfo
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- CN111601379A CN111601379A CN201910570492.0A CN201910570492A CN111601379A CN 111601379 A CN111601379 A CN 111601379A CN 201910570492 A CN201910570492 A CN 201910570492A CN 111601379 A CN111601379 A CN 111601379A
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Abstract
The embodiment of the invention discloses a method and equipment for acquiring a TA (timing advance), which are used for solving the problem that the TA cannot be acquired by terminal equipment in an idle state or an inactive state. The method is executed by a terminal device and comprises the following steps: sending indication information in the random access process; the indication information is used for indicating the terminal equipment to acquire the TA through the random access process to the network equipment. In the method for acquiring a TA provided in the embodiment of the present invention, the terminal device may send the indication information through the random access procedure, where the indication information is used to indicate, to the network device, that the terminal device initiates the random access procedure in order to acquire the TA. Therefore, the network device can send the TA through the random access process, and the terminal device receives the TA and calculates the time information so as to meet the requirement of time precision.
Description
Technical Field
The embodiment of the present application relates to the field of communications, and in particular, to a method and an apparatus for acquiring a Timing Advance (TA).
Background
In a Long Term Evolution (LTE) system, a terminal device supports an idle state and a connected state; in a New Radio (NR) system, a terminal device supports an idle state, an inactive state, and a connected state. In the related art, the terminal device may have a time accuracy requirement, and in this case, the terminal device may perform time correction by receiving the TA sent by the network device to meet the time accuracy requirement. However, the terminal device in the non-connected state (including the idle state or the inactive state) cannot acquire the TA.
Disclosure of Invention
An object of the embodiments of the present invention is to provide a method and a device for acquiring a TA, so as to solve a problem that a terminal device in an idle state or an inactive state cannot acquire the TA.
In a first aspect, a method for acquiring TA is provided, where the method is performed by a terminal device, and the method includes:
sending indication information in the random access process;
the indication information is used for indicating the terminal equipment to acquire the TA through the random access process to the network equipment.
In a second aspect, a method for acquiring TA is provided, the method being performed by a network device, and the method including:
receiving indication information in a random access process;
the indication information is used for indicating the terminal equipment to acquire the TA through the random access process to the network equipment.
In a third aspect, a terminal device is provided, which includes:
a sending unit, configured to send indication information in a random access process;
wherein the indication information is used for indicating the terminal equipment to acquire TA (timing advance) through the random access process to the network equipment
In a fourth aspect, a network device is provided, the network device comprising:
a receiving unit, configured to receive indication information in a random access procedure;
the indication information is used for indicating the terminal equipment to acquire the TA through the random access process to the network equipment.
In a fifth aspect, a terminal device is provided, which comprises a processor, a memory and a computer program stored on the memory and being executable on the processor, the computer program, when executed by the processor, implementing the steps of the method for acquiring TA according to the first aspect.
In a sixth aspect, a network device is provided, which comprises a processor, a memory and a computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, performs the steps of the method for acquiring TA according to the second aspect.
In a seventh aspect, a computer-readable storage medium is provided, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for acquiring TA according to the first and second aspects.
In the embodiment of the present invention, the terminal device may send the indication information through the random access procedure, where the indication information is used to indicate, to the network device, that the terminal device initiates the random access procedure in order to acquire the TA. Therefore, the network device can send the TA through the random access process, and the terminal device receives the TA and calculates the time information so as to meet the requirement of time precision.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic flow chart diagram of a method for acquiring TA in accordance with one embodiment of the present invention;
fig. 2 is a diagram illustrating a MAC layer packet format in a method for acquiring TA according to an embodiment of the present invention;
fig. 3 is a diagram illustrating a subheader format of a MAC CE in the method for acquiring TA according to the embodiment shown in fig. 2;
fig. 4 is a diagram illustrating a MAC CE format in the method for acquiring TA according to the embodiment shown in fig. 2;
FIG. 5 is a schematic flow chart diagram of a method for acquiring TA in accordance with another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;
FIG. 7 is a block diagram of a network device according to one embodiment of the invention;
fig. 8 is a schematic structural diagram of a terminal device according to another embodiment of the present invention;
fig. 9 is a schematic structural diagram of a network device according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. In the various embodiments of the present application and/or in the preceding and following description.
It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example: a Long Term Evolution (LTE) System, an LTE Frequency Division Duplex (FDD) System, an LTE Time Division Duplex (TDD) System, a Universal Mobile Telecommunications System (UMTS) or Worldwide Interoperability for Microwave Access (WiMAX) communication System, a 5G System, a New Radio (NR) System, or a subsequent Evolution communication System.
In the embodiment of the present invention, the Terminal device may include, but is not limited to, a Mobile Station (MS), a Mobile Terminal (Mobile Terminal), a Mobile phone (Mobile Telephone), a User Equipment (UE), a handset (handset), a portable device (portable Equipment), a vehicle (vehicle), etc., and the Terminal device may communicate with one or more core networks through a Radio Access Network (RAN), for example, the Terminal device may be a Mobile phone (or referred to as a "cellular" phone), a computer with a wireless communication function, and the Terminal device may also be a portable, pocket, handheld, computer-embedded, or vehicle-mounted Mobile apparatus.
In the embodiment of the present invention, the network device is a device deployed in a radio access network to provide a wireless communication function for a terminal device. The network device may be a base station, and the base station may include various macro base stations, micro base stations, relay stations, access points, and the like. In systems employing different radio access technologies, the names of devices having a base station function may differ. For example, in an LTE network, called an Evolved node B (eNB or eNodeB), in a third Generation (3G) network, called a node B (node B), or a network device in a later Evolved communication system, etc., although the words are not limiting.
As shown in fig. 1, an embodiment of the present invention provides a method 100 for acquiring TA, which may be performed by a terminal device, and includes the following steps:
s102: and sending indication information in the random access process, wherein the indication information is used for indicating the terminal equipment to acquire the TA through the random access process to network equipment.
In the embodiment of the invention, the terminal equipment in the non-connection state can initiate a random access process, and then the indication information is sent to the network equipment in the random access process, so that the network equipment determines that the purpose of initiating the random access by the terminal equipment is to acquire the TA, and the network equipment can calculate the TA based on the uplink message sent by the terminal equipment in the random access process and send the TA to the terminal equipment. Specifically, for example, the network device calculates the TA by measuring a preamble sequence sent by the terminal device, and sends the TA to the terminal device through a Timing Advance Command field of the RAR.
In this embodiment, the terminal device in the non-connected state initiates the random access procedure only to acquire the TA, but not to enter the connected state, and therefore, the terminal device sends indication information in the random access procedure, where the indication information may indicate that the terminal device initiates the random access procedure only to acquire the TA.
Optionally, the terminal device may further receive a TA in the random access process to calculate the time information, specifically, perform time correction to meet the requirement of time precision.
The sequence of receiving the TA and sending the indication information in this embodiment is not specifically limited, and may be that the indication information is sent first and then received in the random access process, or that the TA is received first and then sent in the random access process.
Optionally, before the implementation of this embodiment, when the terminal device in the non-connected state needs to acquire the TA, the terminal device may further initiate the random access procedure, that is, the triggering condition of the random access procedure is: the non-connected terminal equipment is used for acquiring TA.
The unconnected state mentioned in each embodiment of the present invention may be a state other than a Connected state (Connected) of the terminal device, and specifically, for example, in an LTE system, the unconnected state includes an Idle state (Idle); in the NR system, the unconnected state includes an Inactive state (Inactive) and an idle state, and of course, in the subsequent evolution system, the unconnected state may also include other states besides the idle state and the Inactive state.
In the method for acquiring a TA according to the embodiment of the present invention, the terminal device may send the indication information through the random access procedure, where the indication information is used to indicate, to the network device, that the terminal device initiates the random access procedure in order to acquire the TA. Therefore, the network device can send the TA through the random access process, and the terminal device receives the TA and calculates the time information so as to meet the requirement of time precision.
The terminal device mentioned in each embodiment of the present invention may specifically perform time correction/calibration based on the time information indicated in the downlink information.
Optionally, the indication information may also be used to indicate, to the network device, that the terminal device does not enter the connected state after the random access procedure is ended, that is, the purpose of initiating the random access procedure is only to acquire a TA, and the terminal device desires to maintain an RRC state before initiating the random access procedure, and does not desire to enter the connected state. Therefore, the terminal equipment can obtain the TA through the random access process, maintain the previous non-connection state and reduce the power consumption.
To illustrate the method for acquiring TA according to the embodiments of the present invention in detail, the following description will be made with reference to several specific embodiments.
Example one
Step 1: and the terminal equipment receives the PRACH configuration information.
In the PRACH configuration information, the network device indicates some dedicated PRACH resources (including PRACH time-frequency resources and/or Preamble resources) to reserve a non-connected terminal device to acquire the TA without causing RRC state transition.
In this way, the terminal device initiates random access through the dedicated PRACH resource, and the network device may determine that the purpose of initiating the random access by the terminal device is only to acquire the TA, and does not expect to enter a connected state after the random access process is finished.
Step 2: the terminal device transmits MSG 1.
Specifically, the terminal device transmits MSG1 according to the configuration obtained in step 1.
In one embodiment, the terminal device sends a dedicated (or referred to as target) random access preamble sequence, where the dedicated random access preamble sequence indicates that the terminal device obtains the TA through a random access procedure, and does not enter a connected state after the random access procedure is finished.
In an embodiment, the terminal device sends a preamble sequence on a dedicated PRACH resource, where the preamble sequence sent on the dedicated PRACH resource indicates that the terminal device obtains a TA through a random access procedure, and does not enter a connected state after the random access procedure is finished.
In another preferred embodiment, the terminal device sends a dedicated preamble sequence on the dedicated PRACH resource, where the dedicated preamble sequence sent on the dedicated PRACH resource indicates that the terminal device obtains the TA through the random access procedure, and does not enter the connected state after the random access procedure is ended.
And step 3: the terminal device receives MSG 2.
The MSG2 carries TA information, and of course, the MSG2 also carries UL grant information for the terminal device to send MSG 3.
And 4, step 4: the terminal device transmits MSG3 on the UL grant resource allocated by MSG 2.
The MSG3 includes first check information, and the first check information includes identification information and/or a random number of the terminal device.
And 5: the terminal device receives the second check information, and performs time information calculation based on the TA received in step 2, specifically, performs time correction, when the second check information is consistent with the first check information.
Specifically, for example, if the time indicated in the downlink information sent by the network device is T, the accurate time for the terminal device to receive the downlink information should be T + TA/2.
Optionally, if the second check information is inconsistent with the first check information, the terminal device may further discard the TA received in step 2, and re-initiate the random access procedure to acquire the TA.
This embodiment indicates to the network device through the dedicated RACH resource that the purpose of instructing the terminal device to initiate the random access procedure is only to acquire TA and it is not desired to enter the connected state. The terminal equipment obtains and obtains TA through the random access process to calculate the time information, maintains the previous non-connection state and reduces the power consumption.
In this embodiment, by sending the first check information and receiving the second check information, and performing time information calculation based on the received TA when the second check information is consistent with the first check information, a problem that a plurality of terminal devices cannot acquire an accurate TA because they initiate a random access procedure using the same dedicated PRACH resource is avoided, and reliability of the acquired TA is improved.
Example two
Step 1: the terminal device generates an RRC connection setup request message.
The RRC connection establishment request message includes indication information, where the indication information is used to indicate, to the network device, that the terminal device acquires the TA through the random access procedure, and does not enter the connected state after the random access procedure is completed.
Optionally, the indication information may use a new introduction indication information element IE; it may also be to reuse existing IEs, such as: a new RRC connection setup cause value is defined.
Step 2: the terminal device transmits MSG 1.
The MSG1 sent by the terminal device may specifically be a preamble sequence.
And step 3: the terminal device receives MSG 2.
MSG2 in this step is a random access response message that includes the TA.
And 4, step 4: the terminal device transmits MSG 3.
The MSG3 sent by the terminal device includes the RRC connection setup request message generated in step 1.
And 5: the terminal device receives the RRC connection reject message.
Wherein the RRC connection rejection message is sent by the network device based on the indication information in the RRC connection setup request message.
The embodiment carries the indication information in the RRC connection establishment request message, and indicates to the network device that the terminal device initiates the random access procedure only to acquire the TA, and does not expect to enter the connected state. Therefore, the terminal equipment obtains the TA through the random access process to calculate the time information, maintains the previous non-connection state and reduces the power consumption.
Optionally, the RRC connection establishment request message in this embodiment may also be an RRC connection recovery request message.
The embodiment reuses the existing RRC connection establishment request message/RRC connection recovery request message without newly defining a new RRC message, thereby being convenient for reducing the implementation complexity of related equipment.
Optionally, the RRC connection setup request message sent in step 4 includes first check information, where the first check information includes identification information and/or a random number of the terminal device, the RRC connection rejection message received in step 5 includes second check information, and after the RRC connection rejection message is received, the method further includes the following steps: and when the second check information is consistent with the first check information, calculating time information based on the TA.
In this embodiment, the time information is calculated based on the received TA when the second check information is consistent with the first check information, so that a problem that a plurality of terminal devices cannot acquire an accurate TA because they initiate a random access procedure using the same dedicated PRACH resource is avoided, and reliability of the acquired TA is improved.
EXAMPLE III
Step 1: the terminal device generates an RRC message.
The RRC message in this embodiment is different from the RRC connection setup request message/RRC connection recovery request message in the second embodiment,
the RRC message may be newly defined, and the RRC message may only carry the indication information without carrying other redundant information, and the amount of information carried is small, which is convenient for saving signaling overhead.
Step 2: the terminal device transmits MSG 1.
Specifically, the MSG1 sent by the terminal device may specifically be a preamble sequence.
And step 3: the terminal device receives MSG 2.
MSG2 in this step is a random access response message that includes the TA.
And 4, step 4: the terminal device transmits MSG 3.
The MSG3 sent by the terminal device includes the RRC message generated in step 1.
The embodiment carries the indication information in the RRC message, and indicates to the network device that the terminal device initiates the random access procedure only to acquire the TA, and does not expect to enter the connected state. Therefore, the terminal equipment obtains the TA through the random access process to calculate the time information, maintains the previous non-connection state and reduces the power consumption.
In this embodiment, a new RRC message is defined, and the RRC message may only carry the indication information, so that signaling overhead is saved.
Optionally, the RRC message sent in step 4 above includes first check information, where the first check information includes identification information of the terminal device and/or a random number, and this embodiment may further include step 5, that is, receiving second check information, and if the second check information is consistent with the first check information, calculating time information based on the TA.
In this embodiment, the time information is calculated based on the received TA when the second check information is consistent with the first check information, so that a problem that a plurality of terminal devices cannot acquire an accurate TA because they initiate a random access procedure using the same dedicated PRACH resource is avoided, and reliability of the acquired TA is improved.
Example four
Step 1: the terminal device transmits MSG 1.
Step 2: the end device receives MSG 2.
The MSG2 carries TA information, and of course, the MSG2 also carries UL grant information for the terminal device to send MSG 3.
And step 3: the terminal device transmits MSG3 on the UL grant resource allocated by MSG 2.
With the newly defined MAC CE in MAG 3; the MAC CE is used to indicate to the network device that the present random access is only used for acquiring TA. The MSG3 also carries identification information and/or random number of the terminal device; the identification information and/or random number of the terminal device may be carried in the new MAC CE.
The MAC CE in this embodiment is contained in a MAC PDU (or a MAC sub PDU), and the format of the MAC PDU may refer to fig. 2, where the MAC PDU includes the MAC CE and a sub-header corresponding to the MAC CE.
As for the format of the MAC CE and the sub-header corresponding to the MAC CE, see fig. 3 and 4, wherein the sub-header of fig. 3 includes an R field, an F field, an LCID field, and an L field; wherein, the LCID field is used to indicate the type/purpose of the MAC CE, i.e. to obtain TA; the R field is a reserved bit, usually set to "0"; the F field may be used to indicate the length of the corresponding MAC PDU; the L field may be used to indicate the number of bytes of the corresponding MAC PDU. The MAC CE in fig. 4 carries a contention resolution identity (one type of terminal equipment identity information).
And 4, step 4: the terminal device receives the identification information and/or the random number of the terminal device carried in the MSG 3. After the terminal equipment confirms that the time is consistent with the time sent by the terminal equipment in the step 3, the TA calculation obtained in the step 3 is used for correcting the accurate time sent by the network equipment.
This embodiment indicates to the network device through the MAC CE that the purpose of initiating the random access procedure is only to acquire the TA and it is not desired to enter the connected state. Therefore, the terminal equipment obtains the TA through the random access process to calculate the time information, maintains the previous non-connection state and reduces the power consumption.
In the above embodiments, the network device may calculate a TA based on the reception of MSG3, and send the TA to the terminal device by being carried in MSG 4. The inaccuracy of the value (TA value carried in MSG 2) obtained by calculating TA only according to MSG1 is avoided, and the reliability of TA obtained by the terminal equipment is improved.
The method for acquiring TA according to the embodiment of the present invention is described in detail above with reference to fig. 1. A method for acquiring TA according to another embodiment of the present invention will be described in detail with reference to fig. 5. It is to be understood that the interaction between the network device and the terminal device described from the network device side is the same as that described at the terminal device side in the method shown in fig. 1, and the related description is appropriately omitted to avoid redundancy.
Fig. 5 is a schematic flow chart of an implementation of a method for acquiring a TA according to an embodiment of the present invention, which may be applied to a network device side. As shown in fig. 5, the method 500 includes:
s502: and receiving indication information in the random access process, wherein the indication information is used for indicating the network equipment that the terminal equipment acquires the TA through the random access process.
In the embodiment of the present invention, the network device receives the indication information in the random access process, and the indication information may be used to indicate to the network device that the terminal device initiates the random access process in order to obtain the TA, so that the network device may send the TA in the random access process, and the terminal device may receive the TA and perform the calculation of the time information, so as to meet the requirement of the time accuracy.
Optionally, as an embodiment, the indication information is further used to indicate, to a network device, that the terminal device does not enter a connected state after the random access procedure is ended.
Optionally, as an embodiment, the indication information includes:
a target preamble sequence; or
A target preamble sequence received on a target PRACH resource.
Optionally, as an embodiment, after receiving the indication information in the random access procedure, the method further includes:
sending a random access response message, wherein the random access response message comprises a TA;
receiving first verification information, wherein the first verification information comprises identification information and/or a random number of the terminal equipment;
and sending second check information so that the terminal equipment can calculate the time information based on the TA under the condition that the second check information is consistent with the first check information.
Optionally, as an embodiment, before receiving the indication information in the random access procedure, the method further includes:
sending configuration information;
wherein the configuration information is used for indicating the target preamble sequence; or
The configuration information is used for indicating the target PRACH resource and the target preamble sequence.
Optionally, as an embodiment, the receiving the indication information in the random access procedure includes:
receiving a Radio Resource Control (RRC) message, wherein the RRC message comprises the indication information.
Optionally, as an embodiment, before receiving the RRC message, the method further includes:
receiving a preamble sequence;
sending a random access response message, wherein the random access response message comprises a TA;
after receiving the RRC message, the method further includes:
and sending an RRC connection rejection message based on the indication information.
Optionally, as an embodiment, the RRC message includes first check information, the first check information includes identification information of the terminal device and/or a random number, and the RRC connection rejection message includes second check information, where the second check information is used for the terminal device to calculate time information based on the TA when the second check information is consistent with the first check information.
Optionally, as an embodiment, the RRC message includes:
an RRC connection setup request message; or
An RRC connection resume request message; or
A newly defined RRC message.
Optionally, as an embodiment, the receiving the indication information in the random access procedure includes:
the MAC CE is received in a random access procedure.
Optionally, as an embodiment, before the receiving the MAC CE, the method further includes:
receiving a preamble sequence;
and sending a random access response message, wherein the random access response message comprises the TA.
Optionally, as an embodiment, the MAC CE includes first check information, where the first check information includes identification information and/or a random number of the terminal device, and after receiving the MAC CE, the method further includes:
and sending second check information, wherein the second check information is used for calculating time information based on the TA by the terminal equipment under the condition that the second check information is consistent with the first check information.
Optionally, as an embodiment, the method further includes:
and sending the TA in the random access process, so that the terminal equipment calculates the time information based on the TA.
Optionally, as an embodiment, the TAs include a first TA and a second TA, and the first TA and the second TA are respectively calculated based on different uplink messages.
The method for acquiring TA according to the embodiment of the present invention is described in detail above with reference to fig. 1 to 5. A terminal device according to an embodiment of the present invention will be described in detail below with reference to fig. 6.
Fig. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present invention. As shown in fig. 6, the terminal apparatus 600 includes:
a sending unit 602, configured to send indication information in a random access procedure;
the indication information is used for indicating the terminal equipment to acquire the TA through the random access process to the network equipment.
In the embodiment of the present invention, the terminal device may send the indication information through the random access procedure, where the indication information is used to indicate, to the network device, that the terminal device initiates the random access procedure in order to acquire the TA. Therefore, the network device can send the TA through the random access process, and the terminal device receives the TA and calculates the time information so as to meet the requirement of time precision.
Optionally, as an embodiment, the indication information is further used to indicate, to a network device, that the terminal device does not enter a connected state after the random access procedure is ended.
Optionally, as an embodiment, the indication information includes:
a target preamble sequence; or
And the target preamble sequence is sent on the PRACH resource of the target physical random access channel.
Optionally, as an embodiment, the terminal device 600 further includes: a receiving unit for receiving, wherein,
the receiving unit may be configured to receive a random access response message, where the random access response message includes a TA;
a sending unit 602, further configured to send first check information, where the first check information includes identification information and/or a random number of the terminal device;
the receiving unit may be further configured to receive second check information, and perform calculation of time information based on the TA if the second check information is identical to the first check information.
Optionally, as an embodiment, the terminal device 600 further includes: a receiving unit operable to receive configuration information;
wherein the configuration information is used for indicating the target preamble sequence; or
The configuration information is used for indicating the target PRACH resource and the target preamble sequence.
Optionally, as an embodiment, the sending unit 602 may be configured to send a radio resource control RRC message, where the RRC message includes the indication information.
Optionally, as an embodiment, the sending unit 602 may be further configured to send a preamble sequence; the terminal apparatus 600 further includes: a receiving unit, configured to receive a random access response message, where the random access response message includes a TA; and receiving an RRC connection reject message; wherein the RRC connection rejection message is sent by the network device based on the indication information.
Optionally, as an embodiment, the RRC message includes first check information, the first check information includes identification information of the terminal device and/or a random number, the RRC connection rejection message includes second check information, and after receiving the RRC connection rejection message, the receiving unit may be further configured to perform calculation of time information based on the TA if the second check information is consistent with the first check information.
Optionally, as an embodiment, the RRC message includes:
an RRC connection setup request message; or
An RRC connection resume request message; or
A newly defined RRC message.
Optionally, as an embodiment, the sending unit 602 may be configured to send a medium access control element MAC CE in a random access procedure.
Optionally, as an embodiment, the sending unit 602 may be configured to send a preamble sequence; the terminal apparatus 600 further includes: a receiving unit, configured to receive a random access response message, where the random access response message includes a TA.
Optionally, as an embodiment, the MAC CE includes first check information, where the first check information includes identification information and/or a random number of the terminal device, and the terminal device 600 further includes: and a receiving unit, configured to receive second check information, and perform calculation of time information based on the TA when the second check information matches the first check information.
Optionally, as an embodiment, the terminal device 600 further includes: a receiving unit, configured to receive a TA in a random access procedure; and calculating time information based on the TA.
Optionally, as an embodiment, the TAs include a first TA and a second TA, where the first TA and the second TA are respectively calculated by the network device based on different uplink messages.
Optionally, as an embodiment, the sending unit 602 may be further configured to initiate the random access procedure; wherein the random access procedure is used to acquire TA.
The terminal device 600 according to the embodiment of the present invention may refer to the flow corresponding to the method 100 according to the embodiment of the present invention, and each unit/module and the other operations and/or functions in the terminal device 600 are respectively for implementing the corresponding flow in the method 100 and can achieve the same or equivalent technical effects, and for brevity, no further description is provided herein.
Fig. 7 is a schematic structural diagram of a network device according to an embodiment of the present invention. As shown in fig. 7, the network device 700 includes:
a receiving unit 702, configured to receive indication information in a random access procedure;
the indication information is used for indicating the terminal equipment to acquire the TA through the random access process to the network equipment.
In the embodiment of the present invention, the network device receives the indication information in the random access process, and the indication information may be used to indicate to the network device that the terminal device initiates the random access process in order to obtain the TA, so that the network device may send the TA in the random access process, and the terminal device may receive the TA and perform the calculation of the time information, so as to meet the requirement of the time accuracy.
Optionally, as an embodiment, the indication information is further used to indicate, to a network device, that the terminal device does not enter a connected state after the random access procedure is ended.
Optionally, as an embodiment, the indication information includes:
a target preamble sequence; or
A target preamble sequence received on a target PRACH resource.
Optionally, as an embodiment, the network device 700 further includes a sending unit, where
The sending unit may be configured to send a random access response message, where the random access response message includes a TA;
a receiving unit 702, further configured to receive first verification information, where the first verification information includes identification information and/or a random number of the terminal device;
the sending unit may be configured to send second check information, so that the terminal device performs time information calculation based on the TA if the second check information matches the first check information.
Optionally, as an embodiment, the network device 700 further includes a sending unit, which may be configured to send configuration information;
wherein the configuration information is used for indicating the target preamble sequence; or
The configuration information is used for indicating the target PRACH resource and the target preamble sequence.
Optionally, as an embodiment, the receiving unit 702 may be configured to receive a radio resource control RRC message, where the RRC message includes the indication information.
Optionally, as an embodiment, the receiving unit 702 may be further configured to receive a preamble sequence; the network device 700 further includes a sending unit, configured to send a random access response message, where the random access response message includes a TA; and transmitting an RRC connection reject message based on the indication information.
Optionally, as an embodiment, the RRC message includes first check information, the first check information includes identification information of the terminal device and/or a random number, and the RRC connection rejection message includes second check information, where the second check information is used for the terminal device to calculate time information based on the TA when the second check information is consistent with the first check information.
Optionally, as an embodiment, the RRC message includes:
an RRC connection setup request message; or
An RRC connection resume request message; or
A newly defined RRC message.
Optionally, as an embodiment, the receiving unit 702 may be configured to receive the mac ce in a random access procedure.
Optionally, as an embodiment, the receiving unit 702 may be further configured to receive a preamble sequence; the network device 700 further comprises a sending unit, which is configured to send a random access response message, where the random access response message includes the TA.
Optionally, as an embodiment, the MAC CE includes first check information, where the first check information includes identification information of the terminal device and/or a random number, and the network device 700 further includes a sending unit, configured to send second check information, where the second check information is used for the terminal device to calculate time information based on the TA when the second check information is consistent with the first check information.
Optionally, as an embodiment, the network device 700 further includes a sending unit, which is configured to send a TA in a random access procedure, so that the terminal device performs calculation of the time information based on the TA.
Optionally, as an embodiment, the TAs include a first TA and a second TA, and the first TA and the second TA are respectively calculated based on different uplink messages.
The network device 700 according to the embodiment of the present invention may refer to the flow corresponding to the method 500 according to the embodiment of the present invention, and each unit/module and the other operations and/or functions in the network device 700 are respectively for implementing the corresponding flow in the method 500 and achieving the same or equivalent technical effects, and for brevity, no further description is provided herein.
Fig. 8 is a block diagram of a terminal device of another embodiment of the present invention. The terminal apparatus 800 shown in fig. 8 includes: at least one processor 801, memory 802, at least one network interface 804, and a user interface 803. The various components in the terminal device 800 are coupled together by a bus system 805. It is understood that the bus system 805 is used to enable communications among the components connected. The bus system 805 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 805 in fig. 8.
The user interface 803 may include, among other things, a display, a keyboard, a pointing device (e.g., a mouse, trackball), a touch pad, or a touch screen.
It will be appreciated that the memory 802 in embodiments of the invention may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data rate Synchronous Dynamic random access memory (ddr SDRAM ), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and direct memory bus RAM (DRRAM). The memory 802 of the subject systems and methods described in connection with the embodiments of the invention is intended to comprise, without being limited to, these and any other suitable types of memory.
In some embodiments, memory 802 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 8021 and application programs 8022.
The operating system 8021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic services and processing hardware-based tasks. The application program 8022 includes various application programs, such as a Media Player (Media Player), a Browser (Browser), and the like, for implementing various application services. A program implementing a method according to an embodiment of the present invention may be included in application program 8022.
In this embodiment of the present invention, the terminal device 800 further includes: a computer program stored 802 on the memory and executable on the processor 801, which when executed by the processor 801, implements the steps of the method 100 as follows.
The methods disclosed in the embodiments of the present invention described above may be implemented in the processor 801 or implemented by the processor 801. The processor 801 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 801. The Processor 801 may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may reside in ram, flash memory, rom, prom, or eprom, registers, among other computer-readable storage media known in the art. The computer readable storage medium is located in the memory 802, and the processor 801 reads the information in the memory 802, and combines the hardware to complete the steps of the method. In particular, the computer readable storage medium has stored thereon a computer program, which when executed by the processor 801, performs the steps of the embodiments of the method 100 as described above.
It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.
For a software implementation, the techniques described in this disclosure may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described in this disclosure. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.
The terminal device 800 can implement each process implemented by the terminal device in the foregoing embodiments, and can achieve the same or equivalent technical effects, and for avoiding repetition, details are not described here.
Referring to fig. 9, fig. 9 is a structural diagram of a network device applied in the embodiment of the present invention, which can implement the details of the method embodiment 500 and achieve the same effects. As shown in fig. 9, the network device 900 includes: a processor 901, a transceiver 902, a memory 903, and a bus interface, wherein:
in this embodiment of the present invention, the network device 900 further includes: a computer program stored on the memory 903 and executable on the processor 901, the computer program, when executed by the processor 901, implementing the steps of the method 500.
In fig. 9, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 901 and various circuits of memory represented by memory 903 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 902 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.
The processor 901 is responsible for managing a bus architecture and general processing, and the memory 903 may store data used by the processor 901 in performing operations.
An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements the processes in the method embodiment 100 and the method embodiment 500, and can achieve the same technical effects, and in order to avoid repetition, the computer program is not described herein again. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (34)
1. A method for acquiring a timing advance, TA, the method being performed by a terminal device, the method comprising:
sending indication information in the random access process;
the indication information is used for indicating the terminal equipment to acquire the TA through the random access process to the network equipment.
2. The method of claim 1, wherein the indication information is further used to indicate to a network device that the terminal device does not enter a connected state after the end of the random access procedure.
3. The method of claim 1 or 2, wherein the indication information comprises:
a target randomly accesses a preamble sequence; or
And the target preamble sequence is sent on the PRACH resource of the target physical random access channel.
4. The method of claim 3, wherein after the indication information is sent in a random access procedure, the method further comprises:
receiving a random access response message, wherein the random access response message comprises a TA;
sending first check information, wherein the first check information comprises identification information and/or a random number of the terminal equipment;
and receiving second check information, and calculating time information based on the TA under the condition that the second check information is consistent with the first check information.
5. The method of claim 3, wherein before sending the indication information in the random access procedure, the method further comprises:
receiving configuration information;
wherein the configuration information is used for indicating the target preamble sequence; or
The configuration information is used for indicating the target PRACH resource and the target preamble sequence.
6. The method of claim 1 or 2, wherein the sending the indication information in the random access procedure comprises:
transmitting a Radio Resource Control (RRC) message, wherein the RRC message comprises the indication information.
7. The method of claim 6, wherein prior to the sending the RRC message, the method further comprises:
transmitting a preamble sequence;
receiving a random access response message, wherein the random access response message comprises a TA;
after the sending of the RRC message, the method further includes:
receiving an RRC connection rejection message; wherein the RRC connection rejection message is sent by the network device based on the indication information.
8. The method according to claim 7, wherein the RRC message includes first check information, the first check information including identification information of the terminal device and/or a random number, the RRC connection rejection message including second check information, and after receiving the RRC connection rejection message, the method further comprises:
and when the second check information is consistent with the first check information, calculating time information based on the TA.
9. The method of claim 6, wherein the RRC message comprises:
an RRC connection setup request message; or
An RRC connection resume request message; or
A newly defined RRC message.
10. The method of claim 1 or 2, wherein the sending the indication information in the random access procedure comprises:
and transmitting the media access control unit MAC CE in the random access process.
11. The method of claim 10, wherein prior to the transmitting the MAC CE, the method further comprises:
transmitting a preamble sequence;
receiving a random access response message, the random access response message including a TA.
12. The method according to claim 10, wherein the MAC CE includes first check information, the first check information includes identification information of the terminal device and/or a random number, and after the MAC CE is transmitted, the method further includes:
and receiving second check information, and calculating time information based on the TA under the condition that the second check information is consistent with the first check information.
13. The method of claim 1 or 2, wherein the method further comprises:
receiving a TA in the random access procedure;
and calculating time information based on the TA.
14. The method of claim 13,
the TAs include a first TA and a second TA, which are calculated by the network device based on different uplink messages.
15. The method of claim 1 or 2, wherein before sending the indication information in the random access procedure, the method further comprises:
initiating the random access procedure; wherein the random access procedure is used to acquire TA.
16. A method for acquiring TA, the method being performed by a network device, the method comprising:
receiving indication information in a random access process;
the indication information is used for indicating the terminal equipment to acquire the TA through the random access process to the network equipment.
17. The method of claim 16, wherein the indication information is further used to indicate to a network device that the terminal device does not enter a connected state after the end of the random access procedure.
18. The method of claim 16 or 17, wherein the indication information comprises:
a target preamble sequence; or
A target preamble sequence received on a target PRACH resource.
19. The method of claim 18, wherein after receiving the indication information in a random access procedure, the method further comprises:
sending a random access response message, wherein the random access response message comprises a TA;
receiving first verification information, wherein the first verification information comprises identification information and/or a random number of the terminal equipment;
and sending second check information so that the terminal equipment can calculate the time information based on the TA under the condition that the second check information is consistent with the first check information.
20. The method of claim 18, wherein prior to receiving the indication information in the random access procedure, the method further comprises:
sending configuration information;
wherein the configuration information is used for indicating the target preamble sequence; or
The configuration information is used for indicating the target PRACH resource and the target preamble sequence.
21. The method of claim 16 or 17, wherein the receiving indication information in a random access procedure comprises:
receiving a Radio Resource Control (RRC) message, wherein the RRC message comprises the indication information.
22. The method of claim 21, wherein prior to the receiving the RRC message, the method further comprises:
receiving a preamble sequence;
sending a random access response message, wherein the random access response message comprises a TA;
after the receiving and sending the RRC message, the method further comprises:
and sending an RRC connection rejection message based on the indication information.
23. The method of claim 22, wherein the RRC message includes first check information, the first check information including identification information of the terminal device and/or a random number, and wherein the RRC connection rejection message includes second check information, the second check information being used for the terminal device to perform calculation of time information based on the TA if the second check information is identical to the first check information.
24. The method of claim 21, wherein the RRC message comprises:
an RRC connection setup request message; or
An RRC connection resume request message; or
A newly defined RRC message.
25. The method of claim 16, wherein the receiving indication information in a random access procedure comprises:
the MAC CE is received in a random access procedure.
26. The method of claim 25, wherein prior to the receiving the MAC CE, the method further comprises:
receiving a preamble sequence;
and sending a random access response message, wherein the random access response message comprises the TA.
27. The method according to claim 25, wherein the MAC CE includes first check information, the first check information includes identification information of the terminal device and/or a random number, and after receiving the MAC CE, the method further includes:
and sending second check information, wherein the second check information is used for calculating time information based on the TA by the terminal equipment under the condition that the second check information is consistent with the first check information.
28. The method of claim 16 or 17, wherein the method further comprises:
and sending the TA in the random access process, so that the terminal equipment calculates the time information based on the TA.
29. The method of claim 28,
the TA includes a first TA and a second TA, and the first TA and the second TA are calculated respectively based on different uplink messages.
30. A terminal device, comprising:
a sending unit, configured to send indication information in a random access process;
the indication information is used for indicating the terminal equipment to acquire the TA through the random access process to the network equipment.
31. A network device, comprising:
a receiving unit, configured to receive indication information in a random access procedure;
the indication information is used for indicating the terminal equipment to acquire the TA through the random access process to the network equipment.
32. A terminal device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which when executed by the processor implements the steps of the method for acquiring TA according to any of claims 1 to 15.
33. A network device, comprising: memory, processor and computer program stored on the memory and executable on the processor, which when executed by the processor performs the steps of the method for acquiring TA according to any of claims 16 to 29.
34. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method for acquiring TA according to any one of claims 1 to 29.
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| PCT/CN2020/097095 WO2020259410A1 (en) | 2019-06-27 | 2020-06-19 | Method for obtaining timing advance and devices |
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