CN110740496A - Time synchronization method and device, and time synchronization indication method and device - Google Patents
Time synchronization method and device, and time synchronization indication method and device Download PDFInfo
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- CN110740496A CN110740496A CN201810802132.4A CN201810802132A CN110740496A CN 110740496 A CN110740496 A CN 110740496A CN 201810802132 A CN201810802132 A CN 201810802132A CN 110740496 A CN110740496 A CN 110740496A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0005—Synchronisation arrangements synchronizing of arrival of multiple uplinks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/0015—Synchronization between nodes one node acting as a reference for the others
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides time synchronization methods and devices, time synchronization indication methods and devices, and communication equipment, wherein the time synchronization method applied to a terminal comprises the steps of receiving a wake-up message according to a preset period, identifying information indicating the received message in the wake-up message, and carrying out time synchronization with a base station according to the information indicating the received message.
Description
Technical Field
The invention relates to the technical field of communication, in particular to time synchronization methods and devices, time synchronization indication methods and devices and communication equipment.
Background
According to the future application requirements, the 5G system needs to support a variety of service scenarios, including EMBB (Enhanced Mobile Broadband), URLLC (Ultra-reliable and Low Latency) and MMTC (Massive Machine Communication), during the standard formulation, it is proposed that an enhancement is needed in terms of terminal power saving, and in the 3GPP (3rd Generation Partnership Project) R14 standard, an important research is made on how to save power of a terminal in the RRC-connected state, and in the R16 standard, a step is made on the power saving in the RRC-connected state, and of course, how to research on how to save power of an IDLE radio resource control signaling (IDLE) in the RRC-connected state.
In the standard system, it is proposed that a UE (User Equipment) monitors a PDCCH (physical downlink Control Channel) which accounts for 40% of the entire power consumption, performs data transmission by approximately 20%, and performs presynchronization by approximately 10%.
The purpose of time synchronization is to enable the UE to wake up at any time to access the network to receive or transmit uplink and downlink data, even if the UE is in RRC _ IDLE/RRC _ INACTIVE, the UE periodically monitors PDCCH information to keep time synchronization with the network side, and the purpose of wake-up mechanism is to save power as much as possible for the terminal, so the Pre-syn mechanism needs to be improved to ensure power saving of the terminal.
Disclosure of Invention
The present invention is directed to solving at least the technical problems identified in the prior art or related art .
To this end, aspects of the present invention are directed to methods of time synchronization.
Another aspects of the present invention are to provide indication methods for time synchronization.
A further aspect of the present invention is to propose time synchronization means.
Still another aspects of the present invention are to propose time synchronized pointing devices.
Yet another aspect of the invention is to propose communication devices.
In view of this, according to aspects of the present invention, there are provided time synchronization methods applied to a terminal, the method including receiving a wake-up message according to a preset period, wherein information indicating the received message is identified in the wake-up message, and performing time synchronization with a base station according to the information indicating the received message.
According to the time synchronization method provided by the invention, the terminal wakes up for a short time according to the preset period negotiated with the base station to receive the wake-up message, the wake-up message comprises the information indicating the terminal to receive the message, and the terminal keeps time synchronization with the base station according to the information. By adopting the technical scheme of the invention, the terminal in the wake-up mode does not need to periodically wake up to receive paging information at the base station side so as to obtain the time synchronization parameter, but can accurately perform time synchronization (uplink synchronization) with the base station side when receiving the wake-up information so as to monitor the PDCCH, and the aim of saving power of the terminal can be achieved.
, in the above technical solution, the physical units of receiving the wake-up message and the physical units of receiving the paging message are not , and the power consumption for receiving the wake-up message is much smaller than the power consumption for receiving the paging message.
Further , in the above solution, the ON period of the wake-up message is smaller than that of the paging message, such as 1 OFDM (Orthogonal Frequency Division Multiplexing) symbol, which is defined based ON the content of the wake-up message or is configured by the upper layer.
The time synchronization method according to the present invention may further have the following technical features:
in the above technical solution, preferably, the information indicating the received message includes a time advance of the received message.
In the technical scheme, the information indicating the received message included in the wake-up message may be a time advance of the received message, and the terminal may accurately perform time synchronization with the base station side according to the time advance. The time advance can be set by the base station with reference to the information value of the terminal before entering the wake-up mode.
In any above technical solution, preferably, the method further includes receiving a system message sent by the base station after a preset time period from the receipt of the wake-up message, where the preset time period is greater than or equal to 3 subframes.
In the technical scheme, the terminal enters the wake-up state (different from the transient wake-up) after receiving the preset time period of the wake-up cycle, and receives the system message in the wake-up state, wherein the preset time period is more than or equal to 3 subframes, so that the terminal has enough time to fully enter the wake-up state, and the system message is ensured to be successfully received.
In any above technical solution, preferably, before receiving the wake-up message according to a preset period, the method further includes, before entering the wake-up state, receiving information of the preset period sent by the base station, where the preset period is greater than a sleep period of the terminal.
In the technical scheme, before entering the wake-up state, the terminal negotiates with the base station for a preset period for receiving the wake-up message, where the preset period is longer than a sleep period (1280ms) of a wake-up mode of an existing terminal, so as to ensure that the terminal can accurately receive the wake-up message according to the preset period.
According to another aspects of the present invention, methods for indicating time synchronization are provided, which are applied to a base station, and the method includes sending a wake-up message to a terminal according to a preset period, wherein the wake-up message includes information indicating a received message, so that the terminal performs time synchronization with the base station according to the information indicating the received message.
In the time synchronization indicating method provided by the invention, the base station and the terminal negotiate a preset period to send a wake-up message to the terminal, wherein the wake-up message comprises information for indicating the terminal to receive the message, so that the terminal and the base station can keep time synchronization according to the information. By adopting the technical scheme of the invention, the terminal in the wake-up mode does not need to periodically wake up to receive paging information at the base station side so as to obtain the time synchronization parameter, but can accurately perform time synchronization (uplink synchronization) with the base station side when receiving the wake-up information so as to monitor the PDCCH, and the aim of saving power of the terminal can be achieved.
, in the above technical solution, a physical unit for sending the wake-up message and a physical unit for sending the paging message are not , and the power consumption for sending the wake-up message is much smaller than the power consumption for sending the paging message.
Further , in the above solution, the ON period of the wake-up message is smaller than that of the paging message, such as 1 OFDM symbol, which is defined based ON the content of the wake-up message or is configured by the upper layer.
The method for indicating time synchronization according to the present invention may further include the following technical features:
in the above technical solution, preferably, the information indicating the received message includes a time advance of the received message.
In the technical scheme, the information indicating the received message included in the wake-up message may be a time advance of the received message, and the terminal may accurately perform time synchronization with the base station side according to the time advance. The time advance can be set by the base station with reference to the information value of the terminal before entering the wake-up mode.
In any above technical solution, preferably, before sending the wake-up message to the terminal according to the preset period, the method further includes setting the preset period, and sending information of the preset period to the terminal.
In the technical scheme, before entering the wake-up state, the terminal negotiates with the base station for a preset period for receiving the wake-up message, and the base station sets the preset period for the terminal, wherein the preset period is longer than a sleep period (1280ms) of a wake-up mode of the existing terminal, so that the terminal can accurately receive the wake-up message according to the preset period.
According to another aspects of the present invention, a time synchronization apparatus is provided, which is applied to a terminal, and includes a receiving module configured to receive a wake-up message according to a preset period, where the wake-up message includes information indicating a received message, and a processing module configured to perform time synchronization with a base station according to the information indicating the received message.
According to the time synchronization device provided by the invention, the terminal wakes up for a short time according to the preset period negotiated with the base station to receive the wake-up message, the wake-up message comprises the information indicating the terminal to receive the message, and the terminal keeps time synchronization with the base station according to the information. By adopting the technical scheme of the invention, the terminal in the wake-up mode does not need to periodically wake up to receive paging information at the base station side so as to obtain the time synchronization parameter, but can accurately perform time synchronization (uplink synchronization) with the base station side when receiving the wake-up information so as to monitor the PDCCH, and the aim of saving power of the terminal can be achieved.
, in the above technical solution, the physical units of receiving the wake-up message and the physical units of receiving the paging message are not , and the power consumption for receiving the wake-up message is much smaller than the power consumption for receiving the paging message.
Further , in the above solution, the ON period of the wake-up message is smaller than that of the paging message, such as 1 OFDM symbol, which is defined based ON the content of the wake-up message or is configured by the upper layer.
The time synchronization apparatus according to the present invention may further have the following technical features:
in the above technical solution, preferably, the information indicating the received message includes a time advance of the received message.
In the technical scheme, the information indicating the received message included in the wake-up message may be a time advance of the received message, and the terminal may accurately perform time synchronization with the base station side according to the time advance. The time advance can be set by the base station with reference to the information value of the terminal before entering the wake-up mode.
In any above technical solution, preferably, the receiving module is further configured to receive the system message sent by the base station after a preset time period from the receipt of the wake-up message, where the preset time period is greater than or equal to 3 subframes.
In the technical scheme, the terminal enters the wake-up state (different from the transient wake-up) after receiving the preset time period of the wake-up cycle, and receives the system message in the wake-up state, wherein the preset time period is more than or equal to 3 subframes, so that the terminal has enough time to fully enter the wake-up state, and the system message is ensured to be successfully received.
In any above technical solution, preferably, the receiving module is further configured to receive information of a preset period sent by the base station before entering the awake state, where the preset period is greater than a sleep period of the terminal.
In the technical scheme, before entering the wake-up state, the terminal negotiates with the base station for a preset period for receiving the wake-up message, where the preset period is longer than a sleep period (1280ms) of a wake-up mode of an existing terminal, so as to ensure that the terminal can accurately receive the wake-up message according to the preset period.
According to still another aspects of the present invention, there are provided time synchronization indicating apparatuses, which are applied to a base station, and the apparatus includes a sending module, configured to send a wake-up message to a terminal according to a preset period, where information indicating a received message is identified in the wake-up message, so that the terminal performs time synchronization with the base station according to the information indicating the received message.
According to the time synchronization indicating device provided by the invention, the base station and the terminal negotiate a preset period to send the awakening message to the terminal, wherein the awakening message comprises information for indicating the terminal to receive the message, so that the terminal and the base station can keep time synchronization according to the information. By adopting the technical scheme of the invention, the terminal in the wake-up mode does not need to periodically wake up to receive paging information at the base station side so as to obtain the time synchronization parameter, but can accurately perform time synchronization (uplink synchronization) with the base station side when receiving the wake-up information so as to monitor the PDCCH, and the aim of saving power of the terminal can be achieved.
, in the above technical solution, a physical unit for sending the wake-up message and a physical unit for sending the paging message are not , and the power consumption for sending the wake-up message is much smaller than the power consumption for sending the paging message.
Further , in the above solution, the ON period of the wake-up message is smaller than that of the paging message, such as 1 OFDM symbol, which is defined based ON the content of the wake-up message or is configured by the upper layer.
The time synchronization indicating device according to the present invention may further include the following technical features:
in the above technical solution, preferably, the information indicating the received message includes a time advance of the received message.
In the technical scheme, the information indicating the received message included in the wake-up message may be a time advance of the received message, and the terminal may accurately perform time synchronization with the base station side according to the time advance. The time advance can be set by the base station with reference to the information value of the terminal before entering the wake-up mode.
In any above technical solution, the apparatus preferably further includes a setting module configured to set a preset period, and the sending module is further configured to send information of the preset period to the terminal.
In the technical scheme, before entering the wake-up state, the terminal negotiates with the base station for a preset period for receiving the wake-up message, and the base station sets the preset period for the terminal, wherein the preset period is longer than a sleep period (1280ms) of a wake-up mode of the existing terminal, so that the terminal can accurately receive the wake-up message according to the preset period.
According to still another aspects of the present invention, kinds of communication devices are proposed, which include the time synchronization apparatus according to any above, or the time synchronization indication apparatus according to any above.
The communication device according to the present invention includes the apparatus for time synchronization according to the aforementioned any technical means, or the apparatus for indicating time synchronization according to the aforementioned any technical means, and can achieve all the advantageous effects of the apparatus for time synchronization according to the aforementioned any technical means, or the apparatus for indicating time synchronization according to the aforementioned any technical means.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 shows a flow diagram of a method of time synchronization of embodiments of the present invention;
FIG. 2 shows a flow diagram of a method of time synchronization for another embodiments of the present invention;
FIG. 3 shows a flow diagram of a method of time synchronization for another embodiments of the present invention;
FIG. 4 shows a diagram of preset periods for receiving wake-up messages for embodiments of the present invention;
FIG. 5 shows a flow chart diagram of an indication method of time synchronization of embodiments of the invention;
FIG. 6 shows a flow chart of an indication method of time synchronization of another embodiments of the invention;
FIG. 7 shows a schematic diagram of an apparatus for time synchronization of embodiments of the present invention;
FIG. 8 shows a schematic diagram of an indicating means of time synchronization of embodiments of the present invention;
fig. 9 shows a schematic diagram of a time synchronized pointing device of another embodiments of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understandable, the present invention is described in detail in below with reference to the accompanying drawings and detailed description.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
An embodiment of the aspect of the present invention proposes time synchronization methods, which are applied to a terminal, and fig. 1 shows a flowchart of the time synchronization method of embodiments of the present invention, where the method includes:
102, receiving a wake-up message according to a preset period, wherein the information of the received message is indicated by an identifier in the wake-up message;
and step 104, performing time synchronization with the base station according to the information indicating the received message.
According to the time synchronization method provided by the invention, the terminal wakes up for a short time according to the preset period negotiated with the base station to receive the wake-up message, the wake-up message comprises the information indicating the terminal to receive the message, and the terminal keeps time synchronization with the base station according to the information. By adopting the technical scheme of the invention, the terminal in the wake-up mode does not need to periodically wake up to receive paging information at the base station side so as to obtain the time synchronization parameter, but can accurately perform time synchronization (uplink synchronization) with the base station side when receiving the wake-up information so as to monitor the PDCCH, and the aim of saving power of the terminal can be achieved.
, in the above embodiment, the physical units of receiving wake-up message and the physical units of receiving paging message are not , and the amount of power consumed by receiving wake-up message is much smaller than that consumed by receiving paging message.
Further , in the above embodiment, the ON period of the wake-up message may be smaller than the ON period of the paging message, such as 1 OFDM symbol, which is defined based ON the content of the wake-up message or is de-configured by the upper layers.
In a specific embodiment, the terminal may be a network device such as a smart phone, a tablet computer, and a notebook computer.
Fig. 2 shows a flow diagram of a method of time synchronization of another embodiments of the invention, wherein the method comprises:
In this embodiment, the terminal enters the wake-up state after receiving a preset time period of the wake-up cycle (different from the above-mentioned transient wake-up), and receives the system message in the wake-up state, where the preset time period is greater than or equal to 3 subframes, so as to ensure that the terminal has enough time to fully enter the wake-up state, thereby ensuring smooth reception of the system message.
FIG. 3 shows a flow diagram of a method of time synchronization for still another embodiments of the invention, wherein the method comprises:
In this embodiment, before entering the awake state, the terminal negotiates with the base station for a preset period for receiving the awake message, where the preset period is longer than a sleep period (1280ms) of a wake-up mode of an existing terminal, so as to ensure that the terminal can accurately receive the awake message according to the preset period. As shown in fig. 4, a DRX (Discontinuous Reception) cycle of the terminal is composed of a wake-up cycle and a sleep cycle, where the terminal wakes up briefly in the sleep cycle to receive a wake-up message, and a preset cycle for receiving the wake-up message is longer than the sleep cycle.
In embodiments of the invention, the information indicating the received message preferably comprises a time advance of the received message.
In the technical scheme, the information indicating the received message included in the wake-up message may be a time advance of the received message, and the terminal may accurately perform time synchronization with the base station side according to the time advance. The time advance can be set by the base station with reference to the information value of the terminal before entering the wake-up mode.
In the second aspect of the present invention, time synchronization indication methods are proposed to be applied to a base station, and fig. 5 shows a schematic flow chart of the time synchronization indication methods of embodiments of the present invention, where the method includes:
In the time synchronization indicating method provided by the invention, the base station and the terminal negotiate a preset period to send a wake-up message to the terminal, wherein the wake-up message comprises information for indicating the terminal to receive the message, so that the terminal and the base station can keep time synchronization according to the information. By adopting the technical scheme of the invention, the terminal in the wake-up mode does not need to periodically wake up to receive paging information at the base station side so as to obtain the time synchronization parameter, but can accurately perform time synchronization (uplink synchronization) with the base station side when receiving the wake-up information so as to monitor the PDCCH, and the aim of saving power of the terminal can be achieved.
, in the above embodiment, the physical units for sending the wake-up message and the physical units for sending the paging message are not , and the power consumption for sending the wake-up message is much smaller than the power consumption for sending the paging message.
Further , in the above embodiment, the ON period of the wake-up message may be smaller than the ON period of the paging message, such as 1 OFDM symbol, which is defined based ON the content of the wake-up message or is de-configured by the upper layers.
In a specific embodiment, the terminal may be a network device such as a smart phone, a tablet computer, and a notebook computer.
Fig. 6 shows a flow chart of an indication method of time synchronization of another embodiments of the invention, wherein the method comprises:
step 602, setting a preset period, and sending information of the preset period to a terminal;
step 604, sending a wake-up message to the terminal according to a preset period, wherein the identifier in the wake-up message indicates information of the received message, so that the terminal performs time synchronization with the base station according to the information of the received message.
In this embodiment, before entering the awake state, the terminal negotiates with the base station for a preset period for receiving the awake message, and the base station sets the preset period for the terminal, where the preset period is longer than a sleep period (1280ms) of a wake-up mode of an existing terminal, so as to ensure that the terminal can accurately receive the awake message according to the preset period. As shown in fig. 4, a DRX (Discontinuous Reception) cycle of the terminal is composed of a wake-up cycle and a sleep cycle, where the terminal wakes up briefly in the sleep cycle to receive a wake-up message, and a preset cycle for receiving the wake-up message is longer than the sleep cycle.
In embodiments of the invention, the information indicating the received message preferably comprises a time advance of the received message.
In this embodiment, the information indicating the received message included in the wake-up message may be a timing advance of the received message, and the terminal may accurately perform time synchronization with the base station side according to the timing advance. The time advance can be set by the base station with reference to the information value of the terminal before entering the wake-up mode.
In a third aspect of the present invention, time synchronization apparatuses are proposed for a terminal, and fig. 7 shows a schematic diagram of a time synchronization apparatus 70 according to the present invention, wherein the apparatus 70 includes:
a receiving module 702, configured to receive a wake-up message according to a preset period, where an identifier in the wake-up message indicates information of the received message;
a processing module 704 configured to perform time synchronization with the base station according to the information indicating the received message.
According to the time synchronization device 70 provided by the present invention, the terminal wakes up for a short time according to the preset period negotiated with the base station to receive the wake-up message, the wake-up message includes information indicating that the terminal receives the message, and the terminal maintains time synchronization with the base station according to the information. By adopting the technical scheme of the invention, the terminal in the wake-up mode does not need to periodically wake up to receive paging information at the base station side so as to obtain the time synchronization parameter, but can accurately perform time synchronization (uplink synchronization) with the base station side when receiving the wake-up information so as to monitor the PDCCH, and the aim of saving power of the terminal can be achieved.
, in the above embodiment, the physical units of receiving wake-up message and the physical units of receiving paging message are not , and the amount of power consumed by receiving wake-up message is much smaller than that consumed by receiving paging message.
Further , in the above embodiment, the ON period of the wake-up message may be smaller than the ON period of the paging message, such as 1 OFDM symbol, which is defined based ON the content of the wake-up message or is de-configured by the upper layers.
In a specific embodiment, the terminal may be a network device such as a smart phone, a tablet computer, and a notebook computer. The receiving module 702 may be a receiver or an antenna, etc., and the processing module 704 may be a central processor or a baseband processor, etc.
In embodiments of the invention, the information indicating the received message preferably comprises a time advance of the received message.
In this embodiment, the information indicating the received message included in the wake-up message may be a timing advance of the received message, and the terminal may accurately perform time synchronization with the base station side according to the timing advance. The time advance can be set by the base station with reference to the information value of the terminal before entering the wake-up mode.
In embodiments of the present invention, preferably, the receiving module 702 is further configured to receive a system message sent by the base station after a preset time period from the receiving of the wake-up message, where the preset time period is greater than or equal to 3 subframes.
In this embodiment, the terminal enters the wake-up state after receiving a preset time period of the wake-up cycle (different from the above-mentioned transient wake-up), and receives the system message in the wake-up state, where the preset time period is greater than or equal to 3 subframes, so as to ensure that the terminal has enough time to fully enter the wake-up state, thereby ensuring smooth reception of the system message.
In embodiments of the present invention, preferably, the receiving module 702 is further configured to receive information of a preset period sent by the base station before entering the awake state, where the preset period is greater than a sleep period of the terminal.
In this embodiment, before entering the awake state, the terminal negotiates with the base station for a preset period for receiving the awake message, where the preset period is longer than a sleep period (1280ms) of a wake-up mode of an existing terminal, so as to ensure that the terminal can accurately receive the awake message according to the preset period. As shown in fig. 4, a DRX (Discontinuous Reception) cycle of the terminal is composed of a wake-up cycle and a sleep cycle, where the terminal wakes up briefly in the sleep cycle to receive a wake-up message, and a preset cycle for receiving the wake-up message is longer than the sleep cycle.
In the fourth aspect of the present invention, time synchronization indicating devices are proposed to be applied to a base station, and fig. 8 shows a schematic diagram of time synchronization indicating devices 80 according to the present invention, wherein the device 80 includes:
a sending module 802, configured to send a wake-up message to the terminal according to a preset period, where an identifier in the wake-up message indicates information of a received message, so that the terminal performs time synchronization with the base station according to the information indicating the received message.
According to the time synchronization indicating device 80 provided by the invention, the base station and the terminal negotiate a preset period to send the wake-up message to the terminal, wherein the wake-up message comprises information for indicating the terminal to receive the message, so that the terminal and the base station can keep time synchronization according to the information. By adopting the technical scheme of the invention, the terminal in the wake-up mode does not need to periodically wake up to receive paging information at the base station side so as to obtain the time synchronization parameter, but can accurately perform time synchronization (uplink synchronization) with the base station side when receiving the wake-up information so as to monitor the PDCCH, and the aim of saving power of the terminal can be achieved.
, in the above embodiment, the physical units for sending the wake-up message and the physical units for sending the paging message are not , and the power consumption for sending the wake-up message is much smaller than the power consumption for sending the paging message.
Further , in the above embodiment, the ON period of the wake-up message may be smaller than the ON period of the paging message, such as 1 OFDM symbol, which is defined based ON the content of the wake-up message or is de-configured by the upper layers.
In a specific embodiment, the terminal may be a network device such as a smart phone, a tablet computer, and a notebook computer. The sending module 802 may be a transmitter or an antenna, etc.
Fig. 9 shows a schematic diagram of a time synchronized pointing device 90 of another embodiments of the present invention, wherein the device 90 comprises:
a setting module 902, configured to set a preset period; the sending module is also used for sending information of a preset period to the terminal;
a sending module 904, configured to send a wake-up message to the terminal according to a preset period, where an identifier in the wake-up message indicates information of a received message, so that the terminal performs time synchronization with the base station according to the information indicating the received message.
In this embodiment, before entering the awake state, the terminal negotiates with the base station for a preset period for receiving the awake message, and the base station sets the preset period for the terminal, where the preset period is longer than a sleep period (1280ms) of a wake-up mode of an existing terminal, so as to ensure that the terminal can accurately receive the awake message according to the preset period. As shown in fig. 4, a DRX (Discontinuous Reception) cycle of the terminal is composed of a wake-up cycle and a sleep cycle, where the terminal wakes up briefly in the sleep cycle to receive a wake-up message, and a preset cycle for receiving the wake-up message is longer than the sleep cycle.
In a specific embodiment, the setting module 902 may be a central processing unit, a base station controller, or the like, and the sending module 904 may be a transmitter, an antenna, or the like.
In embodiments of the invention, the information indicating the received message preferably comprises a time advance of the received message.
In this embodiment, the information indicating the received message included in the wake-up message may be a timing advance of the received message, and the terminal may accurately perform time synchronization with the base station side according to the timing advance. The time advance can be set by the base station with reference to the information value of the terminal before entering the wake-up mode.
In an embodiment of the fifth aspect of the present invention, kinds of communication devices are proposed, which include the time synchronization apparatus of any embodiment described above, or the time synchronization indication apparatus of any embodiment described above.
The communication device provided by the present invention includes the time synchronization apparatus according to the aforementioned any embodiment, or the time synchronization indicating apparatus according to the aforementioned any embodiment, and can achieve all the advantages of the time synchronization apparatus according to the aforementioned any embodiment, or the time synchronization indicating apparatus according to the aforementioned any embodiment.
In the description of the present specification, the terms "", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless otherwise explicitly stated or limited, and the terms "connected", "mounted", "fixed", etc. are to be construed , e.g., "connected" may be a fixed connection, a removable connection, or physically connected, directly connected, or indirectly connected through intervening media.
In the description herein, descriptions of the terms " embodiments," " embodiments," "specific embodiments," etc. are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least embodiments or examples of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (15)
1, A method for time synchronization, applied to a terminal, the method comprising:
receiving a wake-up message according to a preset period, wherein the information of the received message is indicated by an identifier in the wake-up message;
and performing time synchronization with the base station according to the information indicating the received message.
2. The method for time synchronization according to claim 1,
the information indicating the received message comprises a time advance of the received message.
3. The method for time synchronization according to claim 1, further comprising:
receiving a system message sent by the base station after a preset time period from the receiving of the awakening message;
wherein the preset time period is greater than or equal to 3 subframes.
4. The method for time synchronization of any , wherein before the receiving the wake-up message according to the preset period, the method further comprises:
before entering an awakening state, receiving the information of the preset period sent by the base station;
and the preset period is greater than the sleep period of the terminal.
5, indication method of time synchronization, applied to a base station, the method comprising:
and sending a wake-up message to the terminal according to a preset period, wherein the information of the received message is indicated by the identifier in the wake-up message, so that the terminal can perform time synchronization with the base station according to the information of the received message.
6. The method for indicating time synchronization according to claim 5,
the information indicating the received message comprises a time advance of the received message.
7. The method for indicating time synchronization according to claim 5 or 6, wherein before sending the wake-up message to the terminal according to the preset period, the method further comprises:
and setting the preset period, and sending the information of the preset period to the terminal.
An apparatus for time synchronization of , applied to a terminal, the apparatus comprising:
the receiving module is used for receiving a wake-up message according to a preset period, wherein the identifier in the wake-up message indicates the information of the received message;
and the processing module is used for carrying out time synchronization with the base station according to the information indicating the received message.
9. The apparatus for time synchronization according to claim 8,
the information indicating the received message comprises a time advance of the received message.
10. The apparatus for time synchronization according to claim 8,
the receiving module is further configured to receive the system message sent by the base station after a preset time period elapses from the time when the wake-up message is received;
wherein the preset time period is greater than or equal to 3 subframes.
11. The apparatus for time synchronization of , wherein the receiver is further configured to receive the request from the client,
the receiving module is further configured to receive the information of the preset period sent by the base station before entering the wake-up state;
and the preset period is greater than the sleep period of the terminal.
An indicating device of kinds of time synchronization, which is applied to a base station, and comprises:
and the sending module is used for sending a wake-up message to the terminal according to a preset period, wherein the identifier in the wake-up message indicates the information of the received message, so that the terminal can perform time synchronization with the base station according to the information of the received message.
13. The indication device of time synchronization of claim 12,
the information indicating the received message comprises a time advance of the received message.
14. The apparatus for indicating time synchronization according to claim 12 or 13, further comprising:
the setting module is used for setting the preset period;
the sending module is further configured to send the information of the preset period to the terminal.
A communications device of the type 15, , comprising:
a device for time synchronization according to any of claims 8 to 11, or
An indication of time synchronisation according to any one of claims 12 to 14 at .
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