CN112911696A - Method for acquiring reference time, method and equipment for indicating reference time - Google Patents
Method for acquiring reference time, method and equipment for indicating reference time Download PDFInfo
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- CN112911696A CN112911696A CN201911137557.9A CN201911137557A CN112911696A CN 112911696 A CN112911696 A CN 112911696A CN 201911137557 A CN201911137557 A CN 201911137557A CN 112911696 A CN112911696 A CN 112911696A
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Abstract
The embodiment of the invention provides a method for acquiring reference time, a method for indicating reference time and equipment, wherein the method comprises the following steps: a terminal receives first information from a first cell, wherein the first information is used for assisting the terminal to acquire reference time information provided by a second cell, and the first cell is an independently working cell; and the terminal acquires reference time information provided by a second cell according to the first information, wherein the second cell is a neighbor cell of the first cell. In the embodiment of the invention, the first cell which works independently sends the first information to the terminal, and the first information can assist the terminal to find the reference time information provided by the second cell, so that the terminal can adjust the time at the terminal side according to the reference time information provided by the second cell.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a method for acquiring reference time, a method for indicating reference time and equipment.
Background
In a New Radio (NR), in order to support time sensitive service in the industrial internet, a terminal (User Equipment, UE)) needs high-precision reference time information (for example, the reference time precision is 10 nanoseconds (ns)), and the high-precision reference time information is provided by a network side in a broadcast or unicast manner (for example, by a downlink information transmission cell (dlinformationtransfer IE)).
At present, when a terminal cannot acquire reference time information of a neighboring cell of an independently operating cell, the terminal cannot adjust time of a terminal side according to the reference time information of the neighboring cell.
Disclosure of Invention
An object of the embodiments of the present invention is to provide a method for acquiring reference time, a method and a device for indicating reference time, which solve the problem that a terminal cannot adjust time at a terminal side according to reference time information of a neighboring cell.
According to a first aspect, an embodiment of the present invention provides a method for acquiring reference time information, which is applied to a terminal, and includes:
receiving first information from a first cell, wherein the first information is used for assisting the terminal to acquire reference time information provided by a second cell, and the first cell is an independently working cell;
and acquiring reference time information provided by a second cell according to the first information, wherein the second cell is a neighbor cell of the first cell.
According to a second aspect, an embodiment of the present invention further provides a method for indicating reference time information, which is applied to a first network node, and includes:
and sending first information to a terminal, wherein the first information is used for assisting the terminal to acquire reference time information provided by a second cell.
According to a third aspect, an embodiment of the present invention further provides a terminal, including:
a receiving module, configured to receive first information from a first cell, where the first information is used to assist the terminal in obtaining reference time information provided by a second cell, and the first cell is an independently operating cell;
and an obtaining module, configured to obtain, according to the first information, reference time information provided by a second cell, where the second cell is a neighboring cell of the first cell.
According to a fourth aspect, an embodiment of the present invention further provides a first network node, including: wherein the content of the first and second substances,
a sending module, configured to send first information to a terminal, where the first information is used to assist the terminal in obtaining reference time information provided by a second cell.
According to a fifth aspect, embodiments of the present invention further provide a communication device, including a processor, a memory, and a program stored on the memory and executable on the processor, where the program, when executed by the processor, implements the steps of the method for acquiring reference time information according to the first aspect, or implements the steps of the method for indicating reference time information according to the second aspect.
According to a fifth aspect, the embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the method for acquiring reference time information according to the first aspect, or the steps of the method for indicating reference time information according to the second aspect.
In the embodiment of the invention, the first cell which works independently sends the first information to the terminal, and the first information can assist the terminal to find the reference time information provided by the second cell, so that the terminal can adjust the time at the terminal side according to the reference time information provided by the second cell.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a block diagram of a wireless communication system according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a method for obtaining a reference time parameter according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating a method for indicating a reference time parameter according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a terminal according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a first network node according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a communication device according to an embodiment of the present invention.
Detailed Description
For better understanding of the embodiments of the present invention, the following technical points are described below:
firstly, a reference time provided by a network:
in a Long Term Evolution (LTE) system, the network sends a system message (e.g., SIB16) to the UE, which may indicate a reference amount of time (e.g., T _ time)reference) The method comprises the following steps:
(1) universal Coordinated Time (UTC);
(2) sunlight Saving Time or Daylight Savings Time (DST);
(3) global Positioning System (GPS) time;
(4) the local time.
When the UE receives the time information, in order to ensure that the UE side time and the network side time are consistent, the protocol agrees that the time position corresponding to the reference time received by the UE is: the boundary of the System Frame Number (SFN) where the ending boundary of the System message transmission window of the System message is located.
For example, the position of the SIB16 where the UE receives the reference time information is (SFN _2, Subframe _1), the system message transmission window of the SIB16 is 10 subframes (Subframe, 10 subframes in 1 SFN), the end boundary of the SIB16 where the UE receives the reference time information corresponding to the system message window is (SFN _3, Subframe _1), and the reference time received by the UE corresponds to the end boundary time of the SFN _ 3.
The reference time provided by the network can also be sent to the UE in a unicast manner, a unicast message will carry a reference SFN value, and the protocol stipulates that the time position corresponding to the reference time received by the UE is: the SFN closest to the reception of the reference time is the system frame end boundary of the reference SFN value.
For example, the location where the UE receives the reference time information is (SFN _2, subframe _1), and the reference SFN value carried in the unicast message is SFN equal to 3, the reference time received by the UE corresponds to the system frame end boundary where the first SFN is equal to 3 in the future.
Two, Dual Connectivity (DC):
in a fifth-Generation mobile communication technology (5th-Generation, 5G) system, a DC architecture (including a Master Cell Group (MCG) and a Secondary Cell Group (SCG)) is adopted, where the MCG corresponds to a Master Node (MN) on a network side, and the SCG corresponds to a Secondary Node (SN) on the network side. The Primary Cell of the MCG is called PCell, and the Primary Cell of the SCG is called Primary Secondary Cell (PScell), which is collectively called SpCell. The Secondary cells of both MCG and SCG are called Secondary cells (scells). A Signaling Radio Bearer (SRB) 1 is a signaling Bearer between the UE and the MN, and an SRB3 is a signaling Bearer between the UE and the SN.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. 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 invention.
The terms "comprises," "comprising," or any other variation thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in the specification and claims means that at least one of the connected objects, such as a and/or B, means that three cases, a alone, B alone, and both a and B, exist.
In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
The techniques described herein are not limited to Long Time Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, and may also be used for various wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems.
The terms "system" and "network" are often used interchangeably. CDMA systems may implement Radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA), and so on. UTRA includes Wideband CDMA (Wideband Code Division Multiple Access, WCDMA) and other CDMA variants. TDMA systems may implement radio technologies such as Global System for Mobile communications (GSM). The OFDMA system may implement radio technologies such as Ultra Mobile Broadband (UMB), evolved-UTRA (E-UTRA), IEEE 802.11(Wi-Fi), IEEE 802.16(WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are parts of the Universal Mobile Telecommunications System (UMTS). LTE and higher LTE (e.g., LTE-A) are new UMTS releases that use E-UTRA. UTRA, E-UTRA, UMTS, LTE-A, and GSM are described in documents from an organization named "third Generation Partnership Project" (3 GPP). CDMA2000 and UMB are described in documents from an organization named "third generation partnership project 2" (3GPP 2). The techniques described herein may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies.
Embodiments of the present invention are described below with reference to the accompanying drawings. The uplink transmission method, the uplink transmission indication method and the uplink transmission indication device provided by the embodiment of the invention can be applied to a wireless communication system. Referring to fig. 1, an architecture diagram of a wireless communication system according to an embodiment of the present invention is shown. As shown in fig. 1, the wireless communication system may include: a first network device 11, a second network device 12 and a terminal 13, the first network device 11 may become a first network node, the second network device 12 may become a second network node, the terminal 13 may be denoted as UE13, the first network device 11 may communicate (transmit signaling or transmit data) with the second network device 12 and the terminal 13. In practical applications, the connections between the above devices may be wireless connections, and fig. 1 illustrates the connections between the devices by solid lines for convenience and convenience in visual representation.
The first network device 11 and the second network device 12 provided in the embodiment of the present invention may be base stations, which may be commonly used base stations, evolved node bs (enbs), or network devices in a 5G system (for example, next generation base stations (gnbs) or Transmission and Reception Points (TRPs)).
The terminal 13 provided in the embodiment of the present invention may be a Mobile phone, a tablet Computer, a notebook Computer, an Ultra-Mobile Personal Computer (UMPC), a netbook or a Personal Digital Assistant (PDA), a Mobile Internet Device (MID), a Wearable Device (Wearable Device), or a vehicle-mounted Device.
Referring to fig. 2, in an embodiment of the present invention, an execution main body of a method for acquiring reference time information is a terminal, and the method includes the following specific steps:
step 201: receiving first information from a first cell, the first information being used to assist the terminal in acquiring (or discovering) reference time information provided by a second cell;
in the embodiment of the present invention, the first cell may be a cell where the terminal resides, and the first cell is an independently operating cell, that is, an SA cell.
Step 202: acquiring reference time information provided by a second cell according to the first information, wherein the second cell is a neighbor cell of the first cell;
in the embodiment of the present invention, the terminal may be a non-connected terminal (e.g., an idle terminal), or may also be a connected terminal.
In the embodiment of the present invention, the second cell may be a neighboring cell of the first cell, but is not limited thereto.
For example, the first information may also be referred to as auxiliary information, and the SA cell provides the terminal with auxiliary information related to its neighboring cell, where the auxiliary information is used to assist the terminal to find reference time information provided by the neighboring cell, so that the terminal may obtain the reference time information provided by the second cell according to the first information.
In some embodiments, the terminal receives, according to the first information, reference Time information provided by the second cell in a Time Division Duplex (TDD) manner.
Further, the time division duplex mode is determined by the terminal, or agreed by the protocol, or configured by the network side.
In some embodiments, if the terminal is in the unconnected state, the terminal receives, according to the first information, reference time information provided by the second cell in a Frequency Division Duplex (FDD) manner.
Further, the frequency point corresponding to the second cell and the serving cell frequency point of the terminal belong to a band combination (band combination) supported by the terminal.
In some implementations, the first information can include one or more of:
(1) first indication information, where the first indication information indicates that the second cell is an independently operating cell or indicates that the second cell is a Non-independently operating cell (NSA cell), for example: indicating whether the second cell is an NAS cell or not by 1 bit, for example, if the value is "0", indicating that the second cell is an NSA cell, and if the value is "1", indicating that the second cell is not an NSA cell;
(2) frequency point information of the second cell, for example, the frequency point of the second cell is f 1;
(3) cell identification information of the second cell, for example: physical Cell Identity (PCI), Global Cell Identity (GCI), Cell identity (Cell ID);
(4) reference time accuracy information of the second cell, for example: the reference time accuracy for the second cell is 10 nanoseconds (ns);
(5) reference time error information of the second cell, for example: the time error of the reference time provided by the second cell is 100 ns;
(6) reference time type information of the second cell, for example: the reference time type provided by the second cell is GPS time, UTC time or local time;
optionally, the first information may include: the first indication information indicates that the second cell is an SA cell, and the method shown in fig. 2 may further include: and setting the frequency point corresponding to the second cell as the high-priority frequency point selected or reselected by the cell.
Optionally, the first information may include: the first indication information indicates that the second cell is an NSA cell, and the method shown in fig. 2 may further include: setting the frequency point corresponding to the second cell as a low-priority frequency point selected or reselected by the cell; or setting the frequency point corresponding to the second cell as the frequency point which is forbidden to be accessed by cell selection or reselection.
Further, when the frequency point corresponding to the second cell is set as a frequency point for cell selection or reselection to prohibit access, the method further includes: and determining the time length for the cell to select or reselect the forbidden access.
Still further, the duration of the cell selection or reselection forbidden access may be agreed by a protocol or configured by a network side.
In some embodiments, the method shown in fig. 2 may further include: and setting the adjacent frequency point of the second cell as a high-priority frequency point selected or reselected by the cell, wherein the frequency band combination formed by the adjacent frequency point of the second cell and the frequency point of the second cell is the frequency band combination supported by the terminal.
In the prior art, there is an NSA cell in the 5G network, the cell does not broadcast the SIB1 system message, and since the scheduling information of other SIBs is in SIB1, the UE cannot directly acquire the information of other SIBs (such as SIB2, SIB3, SIB4, etc.) through the cell that does not operate independently. For the connected UE, the UE only reads a Master Information Block (MIB) of the Cell, and other SIB Information of the Cell is signaled to the UE through Radio Resource Control (RRC) signaling of a Primary Cell (Primary Cell, PCell) of the UE. For the non-connected UE, because it is not in the RRC connected state, it does not have the main control cell to which it belongs, and thus cannot acquire the scheduling information of other SIBs of the NSA cell and the information carried by the other SIBs.
In some embodiments, the terminal reads the reference time information provided by the second cell through a first system message of the second cell, and further, the first system message is a system message provided by the second cell and used for carrying the reference time information. Alternatively, the first System message may be a System Information Block (SIB) 9, but is not limited thereto.
For example, the second cell may be a non-independently operating cell, and the system message of the second cell is enhanced, so that the system message of the non-independently operating second cell may carry the reference time information provided by the second cell, and thus the terminal may directly obtain the reference time information through the non-independently operating second cell.
Optionally, the second cell is a cell that does not operate independently, and the method shown in fig. 2 may further include: the terminal receives second indication information from the second cell, wherein the second indication information is used for forbidding the terminal access without acquiring the reference time information of the second cell. For example, the second indication information is carried in a primary system Message (MIB) of a cell that does not operate independently, and for a UE that does not need to acquire a reference time, the cell is considered to be non-campeable, and further, other system messages (such as SIB1) of the cell are not attempted to be read. For a UE that needs to acquire the reference time from the cell, it may attempt to read other system messages (e.g., SIB9) of the cell to acquire the reference time message.
For example, the second cell may be a cell that does not operate independently, and for a UE in a non-connected state, the UE may find a cell that provides reference time information based on the first information, and read system information of the cell to obtain reference time, thereby avoiding a problem that a terminal in a non-connected state in the prior art cannot obtain reference time information of the cell that does not operate independently.
For another example, for a connected UE, such as a SCG cell, providing reference time, the UE may know that a certain SCG cell can provide reference time based on the first information, and then actively read system information of the SCG cell to obtain reference time, thereby avoiding a problem that a connected terminal in the prior art cannot obtain reference time information of a non-independently operating cell.
In some embodiments, the reference time information provided by the second cell is received from the first network node through dedicated signaling between the terminal and the first network node, e.g., the cell of the SCG may provide the reference time and the UE establishes the SRB3, then the SN provides the reference time information directly to the UE through the SRB 3.
In some embodiments, reference time information provided by a second cell under a second network node is received through dedicated signaling between the terminal and the first network node; for example, the cell of the SCG may provide the reference time, but the UE does not establish the SRB3 bearer with the SN, and the MN provides the reference time information provided by the cell of the SCG through SRB1 or SRB 2.
Further, the terminal receives third indication information from the first network node, the third indication information indicating that the reference time information is generated by the second network node; and the terminal determines a specific cell of the second network node as a reference cell of the reference time according to the third indication information, wherein the specific cell is agreed by a protocol or configured by a network side.
In some embodiments, the terminal determines a specific cell or frequency point from a plurality of second cells according to the first information; and the terminal acquires the reference time information provided by the specific cell or the frequency point from the specific cell or the frequency point.
Illustratively, the first information is used to discover reference time information provided by neighbor cell a and neighbor cell B, for example: the reference time information provided by the neighboring cell a is 10ns, and the reference time information provided by the neighboring cell B is 100ns, so that the terminal can select to read the reference time information provided by the cell a from the cell a to be 10ns according to the first information and the requirement of the terminal.
Further, the specific cell or frequency point satisfies one or more of the following conditions:
(1) the reference time precision provided by a specific cell or frequency point is higher than or equal to the time precision requirement of the terminal;
(2) the reference time error provided by a specific cell or frequency point is less than or equal to the synchronization precision error requirement of the terminal;
(3) the type of reference time provided by a specific cell or frequency point is the type of reference time required by the terminal.
In the embodiment of the invention, the first cell which works independently sends the first information to the terminal, and the first information can assist the terminal to find the reference time information provided by the second cell, so that the terminal can adjust the time at the terminal side according to the reference time information provided by the second cell.
Referring to fig. 3, an embodiment of the present invention provides a method for indicating reference time information, where an execution subject of the method is a first network node, and the first network node serves a first cell, and the method includes the following specific steps:
step 301: sending first information to a terminal;
in the embodiment of the present invention, the terminal may be a non-connected terminal (e.g., an idle terminal), or may also be a connected terminal.
In the embodiment of the present invention, the first cell is an independently operating cell, i.e., an SA cell; the first information may also be referred to as auxiliary information, and the first information is used for assisting the terminal to acquire reference time information provided by the second cell; the second cell is a neighbor cell of the first cell.
For example, for a non-connected UE, the UE may find a cell providing reference time information based on the first information, and read system information of the cell to obtain the reference time. For a connected UE, such as a cell of an SCG, providing a reference time, the UE may know the reference time provided by the cell of the SCG based on the first information, and then actively read system information of the cell of the SCG to obtain the reference time.
In some embodiments, the method shown in fig. 3 may further include: the first network node sends to the terminal reference time information provided by a second cell of the second network node.
Further, third indication information is sent to the terminal, the third indication information indicating that the reference time information is generated by the second network node. Wherein the second network node serves the second cell.
In some implementations, the first information can include one or more of:
(1) first indication information indicating that the second cell is an independently operating cell or indicating that the second cell is a non-independently operating cell, for example: indicating whether the second cell is an NAS cell or not by 1 bit, for example, if the value is "0", indicating that the second cell is an NSA cell, and if the value is "1", indicating that the second cell is not an NSA cell;
(2) the frequency point information of the second cell, for example: the frequency point of the second cell is f 1;
(3) cell identification information of the second cell, for example: PCI, GCI, Cell ID;
(4) reference time accuracy information of the second cell, for example: the reference time precision provided by the second cell is 10 ns;
(5) reference time error information of the second cell, for example: the time error of the reference time provided by the second cell is 100 ns;
(6) reference time type information of the second cell, for example: the reference time type provided by the second cell is GPS time, UTC time or local time;
in the embodiment of the present invention, the first cell operating independently may send the first information to the terminal, where the first information may assist the terminal to find the reference time information provided by the second cell, so that the terminal may adjust the time at the terminal side according to the reference time information provided by the second cell.
The method of the present invention is described below with reference to specific embodiments, which include the steps of:
step 1: the standalone cell provides its neighbor cell-related assistance information for the UE to discover reference time information provided by the neighbor cell.
For example: the UE resides in the cell 1, the cell 1 provides the auxiliary information related to the cell 2, and the UE can acquire the reference time information provided by the cell 2 through the auxiliary information.
Wherein the auxiliary information is a combination of one or more of the following items:
(1) indication information of whether the neighbor cell is non-standalone operation, for example: the 1 bit indicates whether the neighboring cell is an NAS cell, for example, the value is "0", which indicates that the neighboring cell is an NSA cell, and the value is "1", which indicates that the neighboring cell is not an NSA cell;
(2) frequency point information of the neighboring cell, for example: the frequency point of the adjacent cell is f 1;
(3) cell identification information of the neighbor cell, for example: PCI, GCI or Cell ID;
(4) reference time accuracy information of the neighbor cell, for example: the reference time precision provided by the cell is 10 ns;
(5) reference time error information of the neighbor cell, for example: the time error of the reference time provided by the cell is 100 ns;
(6) reference time type information of the neighbor cell, for example: the reference time type provided by the cell is GPS time, UTC time or local time and the like;
wherein the assistance message may be provided to the UE through a system message of the standalone serving cell.
For example: cell 1 is an SA cell, cell 2 can provide reference time, and cell 1 provides reference time related auxiliary information of cell 2 in its system message (e.g. newly introduced SIBx); for the connected UE, the auxiliary information may also be provided through a dedicated message, for example, a Primary cell (PCell) of the connected UE provides reference time related auxiliary information of a neighboring cell through the dedicated message.
Step 2: and the UE acquires the reference timing information provided by the cell or the frequency point from the specific cell or the frequency point according to the auxiliary information.
Further, a specific cell or frequency point satisfies one or more of the following conditions:
(1) the reference time precision provided by a specific cell or frequency point is higher than or equal to the time precision requirement of the UE;
(2) the reference time error provided by a specific cell or frequency point is less than or equal to the synchronization precision error requirement of the UE;
(3) the reference time type provided by a specific cell or frequency point is the reference time type required by the UE;
the method for acquiring the reference time information from the specific cell or frequency point by the UE comprises the following steps:
the first method is as follows: the UE obtains the reference time information by reading a specific system message of a specific cell or a cell under a frequency point, where the specific system message is a system message (e.g., SIB9) provided by the cell and used for carrying the reference time information.
Further, if the cell providing the reference time information through the system message is a non-independent working cell, the cell also carries indication information, and the indication information is used for prohibiting access of the UE which does not need to acquire the reference time information.
For example: for the non-connected UE, the UE finds a cell providing reference time information based on the auxiliary information, and reads system information of the cell to acquire reference time; for a connected UE, such as a cell of an SCG, a reference time is provided, and the UE reads system information of the cell of the SCG based on the assistance information to obtain the reference time.
The second method comprises the following steps: the UE in a connected state receives reference time information provided by a cell under a network node through a special message between the UE and the network node;
for example: the cell of the SCG may provide the reference time, and the UE establishes SRB3, the SN provides the reference time information to the UE directly through SRB 3;
the third method comprises the following steps: the connected UE receives reference time information provided by cells of other network nodes through a special message between the connected UE and the network nodes;
for example: the cell of the SCG may provide the reference time, but the UE does not establish the SRB3 bearer, the MN provides the reference time information provided by the cell of the SCG through SRB1 or SRB 2.
Further, the network node which issues the reference time information indicates, by display or implicit expression, which network node generated the reference time message. And after receiving the reference time message, the UE takes the specific cell under the indicated network node as a reference cell of the reference time.
For example: the network node 1 sends a reference time message to the UE, and displays or implicitly indicates the UE that the reference time message is generated for the network node 2, and then the UE selects a cell (e.g., a PScell) under the network node 2 as a reference cell of reference time in the reference time message, wherein the displayed indication can be implemented by adding new indication information, and the indicated implicit indication method can be implemented by placing the reference time message in a specific container (container);
further, before the network node provides the UE with the reference time provided by the cell under the other network node, the network node needs to perform negotiation, which is as follows:
and negotiating the synchronization error between the network nodes, for example, generating the reference time by the network node 2, and adjusting the reference time generated by the network node 2 by the network node 1 based on the synchronization error between the network nodes. The network node 1 sends the reference time to the UE, and the UE selects a cell (e.g., PCell) under the network node 1 as a reference cell of the reference time in the reference time message.
For the non-connected UE, in order to obtain the reference time on the specific cell or frequency point, the UE behavior further includes one or more of the following:
(1) the UE receives reference time information from a specific cell or a cell under a frequency point in a time division mode, wherein the time division mode is set by the UE independently or by a network;
for example: the UE resides in a cell 1, a cell 2 provides reference time required by the UE, and the UE periodically reads system information of the cell 2 to receive the reference time information, wherein the period can be set by the UE and can also be configured by a network;
(2) the UE sets a neighboring frequency point of a cell providing reference time as a high-priority frequency point selected or renewed by the cell, wherein a frequency point corresponding to the cell providing reference time and the neighboring frequency point belong to a band combination (band combination), and the band combination is a frequency band combination which can be supported by the UE;
further, if the independent operating cell provides the indication information of whether the cell under a certain cell or frequency point is an independent operating cell, the UE may perform cell selection or reselection by:
(1) if the independent working cell provides the indication information that a certain specific cell or a cell under the frequency point is the independent working cell, the UE sets the frequency point corresponding to the specific cell or the frequency point as a cell selection or renewed high-priority frequency point;
for example: the UE in a non-connection state resides on a cell 1, the cell 1 indicates a cell 2 to provide reference time information and indicates that the cell 2 is an independent working cell, and then the UE sets a frequency point corresponding to the cell 2 as a high-priority frequency point for cell selection or reselection;
(2) if the independent working cell provides a certain specific cell or a cell under the frequency point is a non-independent working cell, the UE sets the frequency point or the specific frequency band corresponding to the specific cell as a cell selection or reselection low priority frequency point, or sets the frequency band or the specific frequency band corresponding to the specific cell as a cell selection or re-prohibition access frequency point. Additionally, UE sets the time length for forbidding the access of the frequency point, wherein the time length is set by a protocol convention or a network;
for example: the UE in a non-connection state resides on a cell 1, the cell 1 indicates a cell 2 to provide reference time information and indicates that the cell 2 is a non-independent working cell, and then the UE sets a frequency point corresponding to the cell 2 as a cell selection/low priority frequency point again, or sets a frequency point corresponding to the cell 2 as a cell selection.
Referring to fig. 4, an embodiment of the present invention provides a terminal, where the terminal 400 includes:
a receiving module 401, configured to receive first information from a first cell, where the first information is used to assist the terminal to obtain (or discover) reference time information provided by a second cell, and the first cell is an independently operating cell;
an obtaining module 402, configured to obtain, according to the first information, reference time information provided by a second cell, where the second cell is a neighboring cell of the first cell.
Optionally, the obtaining module 402 is further configured to receive, according to the first information, the reference time information provided by the second cell in a time division duplex manner.
Optionally, the tdd mode is determined by the terminal, or agreed by a protocol, or configured by a network side.
Optionally, the obtaining module 402 is further configured to receive the reference time information provided by the second cell in a frequency division duplex manner according to the first information.
Optionally, the frequency point corresponding to the second cell and the serving cell frequency point of the terminal belong to a frequency band combination supported by the terminal.
Optionally, the first information comprises one or more of:
first indication information indicating that the second cell is a cell operating independently or indicating that the second cell is a cell operating non-independently;
frequency point information of the second cell;
cell identification information of the second cell;
reference time accuracy information of the second cell;
reference time error information for the second cell;
reference time type information of the second cell.
Optionally, the first information includes: the first indication information indicates that the second cell is a cell operating independently;
the obtaining module 402 is further configured to set the frequency point corresponding to the second cell as a high-priority frequency point for cell selection or reselection.
Optionally, the first information includes: the first indication information indicates that the second cell is a non-independently operating cell;
the obtaining module 402 is further configured to set a frequency point corresponding to the second cell as a low-priority frequency point for cell selection or reselection;
the obtaining module 402 is further configured to set the frequency point corresponding to the second cell as a frequency point for cell selection or reselection to prohibit access.
Optionally, setting the frequency point corresponding to the second cell as a frequency point for cell selection or reselection to prohibit access;
the obtaining module 402 is further configured to determine a duration of the cell selection or reselection prohibited access.
Optionally, the duration of the cell selection or reselection forbidden access is agreed by a protocol or configured by a network side.
Optionally, the obtaining module 402 is further configured to set an adjacent frequency point of the second cell as a high-priority frequency point for cell selection or reselection, where a frequency band combination formed by the adjacent frequency point of the second cell and the frequency point of the second cell is a frequency band combination supported by the terminal.
Optionally, the obtaining module 402 is further configured to obtain, by using a first system message of the second cell, reference time information provided by the second cell, where the first system message is a system message provided by the second cell and used for carrying the reference time information.
Optionally, the second cell is a non-independent working cell;
the receiving module 401 is further configured to receive second indication information from the second cell, where the second indication information is used to prohibit a terminal that does not need to acquire the reference time information of the second cell from accessing.
Optionally, the obtaining module 402 is further configured to receive, from a first network node, reference time information provided by the second cell through dedicated signaling between the terminal and the first network node.
Optionally, the obtaining module 402 is further configured to receive, through dedicated signaling between the terminal and the first network node, reference time information provided by the second cell in the second network node.
Optionally, the receiving module 401 is further configured to receive third indication information from the first network node, where the third indication information indicates that the reference time information is generated by the second network node;
the obtaining module 402 is further configured to determine, according to the third indication information, a specific cell of the second network node as a reference cell of reference time, where the specific cell is agreed by a protocol or configured by a network side.
Optionally, the obtaining module 402 is further configured to determine a specific cell or frequency point from the plurality of second cells according to the first information;
the obtaining module 402 is further configured to obtain, from the specific cell or frequency point, reference time information provided by the specific cell or frequency point.
Optionally, the specific cell or frequency point satisfies one or more of the following conditions:
the reference time precision provided by the specific cell or the frequency point is higher than or equal to the time precision requirement of the terminal;
the reference time error provided by the specific cell or the frequency point is less than or equal to the synchronization precision error requirement of the terminal;
and the reference time type provided by the specific cell or the frequency point is the reference time type required by the terminal.
The terminal provided in the embodiment of the present invention may implement the embodiment shown in fig. 2, which has similar implementation principles and technical effects, and this embodiment is not described herein again.
Referring to fig. 5, an embodiment of the present invention provides a first network node 500, including:
a sending module 501, configured to send first information to a terminal, where the first information is used to assist the terminal to obtain reference time information provided by a second cell.
Optionally, the sending module 501 is further configured to send, to the terminal, the reference time information provided by the second cell of the second network node.
The first network node provided in the embodiment of the present invention may execute the above-described embodiment shown in fig. 3, and the implementation principle and technical effect are similar, which are not described herein again.
Referring to fig. 6, an embodiment of the present invention provides a communication device 600, including: a processor 601, a transceiver 602, a memory 603, and a bus interface.
Among other things, the processor 601 may be responsible for managing the bus architecture and general processing. The memory 603 may store data used by the processor 601 in performing operations.
In this embodiment of the present invention, the communication device 600 may further include: a program stored on the memory 603 and executable on the processor 601, which when executed by the processor 601, performs the steps of the method provided by embodiments of the present invention.
In fig. 6, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 601 and various circuits of memory represented by memory 603 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 in connection with embodiments of the present invention. The bus interface provides an interface. The transceiver 602 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 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 of the method embodiments, and can achieve the same technical effects, and in order to avoid repetition, the details are not repeated here. 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.
The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may be comprised of corresponding software modules that may be stored in Random Access Memory (RAM), flash Memory, Read-Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), registers, a hard disk, a removable hard disk, a compact disc Read Only Memory (cd-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuit (ASIC). Additionally, the ASIC may reside in a core network interface device. Of course, the processor and the storage medium may reside as discrete components in a core network interface device.
Those skilled in the art will recognize that, in one or more of the examples described above, the functions described in this invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present invention should be included in the scope of the present invention.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (24)
1. A method for obtaining reference time information is applied to a terminal, and is characterized by comprising the following steps:
receiving first information from a first cell, wherein the first information is used for assisting the terminal to acquire reference time information provided by a second cell, and the first cell is an independently working cell;
and acquiring reference time information provided by a second cell according to the first information, wherein the second cell is a neighbor cell of the first cell.
2. The method of claim 1, wherein the obtaining the reference time information provided by the second cell according to the first information comprises:
and receiving the reference time information provided by the second cell in a time division duplex mode according to the first information.
3. The method of claim 2, wherein the tdd mode is determined by the terminal, or agreed by a protocol, or configured by a network side.
4. The method of claim 1, wherein the obtaining the reference time information provided by the second cell according to the first information comprises:
and receiving the reference time information provided by the second cell in a frequency division duplex mode according to the first information.
5. The method according to claim 4, wherein the corresponding frequency point of the second cell and the serving cell frequency point of the terminal belong to a frequency band combination supported by the terminal.
6. The method of claim 1, wherein the first information comprises one or more of:
first indication information indicating that the second cell is a cell operating independently or indicating that the second cell is a cell operating non-independently;
frequency point information of the second cell;
cell identification information of the second cell;
reference time accuracy information of the second cell;
reference time error information for the second cell;
reference time type information of the second cell.
7. The method of claim 6, wherein the first information comprises: the first indication information indicating that the second cell is an independently operating cell, the method further comprising:
and setting the frequency point corresponding to the second cell as a high-priority frequency point selected or reselected by the cell.
8. The method of claim 6, wherein the first information comprises: the first indication information indicating that the second cell is a non-standalone cell, the method further comprising:
setting the frequency point corresponding to the second cell as a low-priority frequency point selected or reselected by the cell;
alternatively, the first and second electrodes may be,
and setting the frequency point corresponding to the second cell as a frequency point which is forbidden to be accessed by cell selection or reselection.
9. The method according to claim 8, wherein the frequency point corresponding to the second cell is set as a frequency point for cell selection or reselection to prohibit access, and the method further comprises:
and determining the time length for the cell to select or reselect the forbidden access.
10. The method of claim 9, wherein the duration of cell selection or reselection barring is agreed by a protocol or configured by a network side.
11. The method of claim 1, further comprising:
and setting the adjacent frequency point of the second cell as a high-priority frequency point selected or reselected by the cell, wherein a frequency band combination formed by the adjacent frequency point of the second cell and the frequency point of the second cell is a frequency band combination supported by the terminal.
12. The method of claim 1, wherein the obtaining the reference time information provided by the second cell according to the first information comprises:
and acquiring the reference time information provided by the second cell through a first system message of the second cell, wherein the first system message is a system message provided by the second cell and used for bearing the reference time information.
13. The method of claim 12, wherein the second cell is a non-standalone cell, and wherein the method further comprises:
and receiving second indication information from the second cell, wherein the second indication information is used for prohibiting the access of a terminal which does not need to acquire the reference time information of the second cell.
14. The method of claim 1, wherein the obtaining the reference time information provided by the second cell according to the first information comprises:
receiving, from a first network node, reference time information provided by the second cell through dedicated signaling between the terminal and the first network node.
15. The method of claim 1, wherein the obtaining the reference time information provided by the second cell according to the first information comprises:
and receiving reference time information provided by the second cell under the second network node through dedicated signaling between the terminal and the first network node.
16. The method of claim 15, further comprising:
receiving third indication information from the first network node, the third indication information indicating that the reference time information was generated by the second network node;
and determining a specific cell of the second network node as a reference cell of reference time according to the third indication information, wherein the specific cell is agreed by a protocol or configured by a network side.
17. The method of claim 1, wherein the obtaining the reference time information provided by the second cell according to the first information comprises:
determining a specific cell or frequency point from a plurality of second cells according to the first information;
and acquiring the reference time information provided by the specific cell or the frequency point from the specific cell or the frequency point.
18. The method according to claim 17, wherein the specific cell or frequency point satisfies one or more of the following conditions:
the reference time precision provided by the specific cell or the frequency point is higher than or equal to the time precision requirement of the terminal;
the reference time error provided by the specific cell or the frequency point is less than or equal to the synchronization precision error requirement of the terminal;
and the reference time type provided by the specific cell or the frequency point is the reference time type required by the terminal.
19. A method for indicating reference time information, applied to a first network node, comprising:
and sending first information to a terminal, wherein the first information is used for assisting the terminal to acquire reference time information provided by a second cell.
20. The method of claim 19, further comprising:
sending the reference time information provided by the second cell of a second network node to the terminal.
21. A terminal, comprising:
a receiving module, configured to receive first information from a first cell, where the first information is used to assist the terminal in obtaining reference time information provided by a second cell, and the first cell is an independently operating cell;
and an obtaining module, configured to obtain, according to the first information, reference time information provided by a second cell, where the second cell is a neighboring cell of the first cell.
22. A first network node, comprising: wherein the content of the first and second substances,
a sending module, configured to send first information to a terminal, where the first information is used to assist the terminal in obtaining reference time information provided by a second cell.
23. A communication device comprising a processor, a memory and a program stored on the memory and executable on the processor, the program, when executed by the processor, implementing the steps of the method of obtaining reference time information according to any one of claims 1 to 18 or the steps of the method of indicating reference time information according to any one of claims 19 to 20.
24. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method of acquiring reference time information according to any one of claims 1 to 18, or the steps of the method of indicating reference time information according to any one of claims 19 to 20.
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| CN201911137557.9A CN112911696B (en) | 2019-11-19 | 2019-11-19 | Method for acquiring reference time, method and equipment for indicating reference time |
| PCT/CN2020/129753 WO2021098717A1 (en) | 2019-11-19 | 2020-11-18 | Method for obtaining reference time, method for indicating reference time, and device |
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| CN201911137557.9A CN112911696B (en) | 2019-11-19 | 2019-11-19 | Method for acquiring reference time, method and equipment for indicating reference time |
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| CN112911696B (en) | 2022-06-10 |
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