WO2015054881A1 - 一种通信方法、基站及终端 - Google Patents

一种通信方法、基站及终端 Download PDF

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Publication number
WO2015054881A1
WO2015054881A1 PCT/CN2013/085444 CN2013085444W WO2015054881A1 WO 2015054881 A1 WO2015054881 A1 WO 2015054881A1 CN 2013085444 W CN2013085444 W CN 2013085444W WO 2015054881 A1 WO2015054881 A1 WO 2015054881A1
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WO
WIPO (PCT)
Prior art keywords
current discovery
discovery period
period
current
broadcast
Prior art date
Application number
PCT/CN2013/085444
Other languages
English (en)
French (fr)
Inventor
张祺智
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP13895449.0A priority Critical patent/EP3048844B1/en
Priority to CA2927625A priority patent/CA2927625A1/en
Priority to CN201380003295.1A priority patent/CN105052225B/zh
Priority to JP2016523973A priority patent/JP6247386B2/ja
Priority to PCT/CN2013/085444 priority patent/WO2015054881A1/zh
Publication of WO2015054881A1 publication Critical patent/WO2015054881A1/zh
Priority to US15/131,905 priority patent/US10349408B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453Resources in frequency domain, e.g. a carrier in FDMA
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0003Two-dimensional division
    • H04L5/0005Time-frequency
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signaling for the administration of the divided path
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/16Discovering, processing access restriction or access information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/30Resource management for broadcast services

Definitions

  • the present invention relates to the field of communications, and in particular, to a communication method, a base station, and a terminal. Background technique
  • End-to-end communication (Device to Device, D2D for short) refers to the terminal ( User
  • UE Equipment
  • D2D technology can reduce the burden on the macro network and increase the communication rate between UEs.
  • UEs In order to achieve direct communication with each other, UEs must first discover each other. In order to introduce the D2D communication mode in the Long Term Evolution (LTE) system, it is necessary to insert a Discovery period in the LTE system, and the UEs transmit the Discovery signal in the Discovery period to enable other UEs to discover. Yourself. In order not to affect the cellular communication of the existing LTE system, the time interval between every two Discovery periods may be relatively long, for example, hundreds of milliseconds to several seconds. Each Discovery period is decomposed in time into a number of time units, denoted by 'eJ; each time unit can be divided into several frequency domain units according to the same regular frequency, denoted by e/.
  • each UE participating in D2D Discovery can send a Discovery signal in a certain time unit for other UEs to detect. It is generally considered that UEs that simultaneously transmit the Discovery signal cannot hear each other, so it is necessary to perform a frequency-hopping jump for each of the Discovery time periods, that is, each UE transmits the time-frequency position of the D is covery signal in each Di sco very time period. Differently, each UE has a chance to be found by all other UEs, and the pattern of the Discovery period is also the time-frequency pattern of the discovery period.
  • a first aspect of the present invention provides a communication method, including:
  • the base station generates a current discovery frame identifier of the current discovery period; the base station broadcasts the current discovery frame identifier of the current discovery period, so that the terminal that receives the broadcast sent by the base station according to the current discovery period in the broadcast
  • the current discovery frame identifier acquires a frequency time pattern of the current discovery period, or acquires a frequency time pattern of the discovery period after the current discovery period.
  • the acquiring, by the base station, the current discovery frame identifier of the current discovery period includes: the base station calculating a current discovery period according to a sequence number of the current discovery period and a cycle period of the discovery frame. The frame identifier is currently found.
  • the sending, by the base station, the current discovery frame identifier of the current discovery period includes: sending, by the base station, a broadcast before the current discovery period arrives, where Broadcasting includes a current discovery frame identifier of the current discovery period; or, the base station sends a broadcast in the current discovery period, where the broadcast includes a current discovery frame identifier of the current discovery period.
  • the sending, by the base station, the current discovery frame identifier of the current discovery period includes: sending, by the base station, a broadcast before the preset discovery period arrives, where The broadcast includes a current discovery frame identifier of the current discovery period; or,
  • the base station sends a broadcast in the preset discovery period, where the broadcast includes a current discovery frame identifier of the current discovery period.
  • a second aspect of the present invention provides a communication method, including:
  • the discovery frame identifier of the current discovery period is obtained by a sequence number of a current discovery period and a cycle period of the discovery frame.
  • the terminal receives a broadcast sent by a base station, and obtains a current discovery frame identifier of a current discovery period from the broadcast, where: the terminal is in the current discovery period Receiving the current discovery frame identifier of the current discovery period by broadcast before arrival; or
  • the terminal receives a broadcast sent by the base station, and obtains a current discovery of the current discovery period from the broadcast.
  • the frame identifier includes: receiving, by the terminal, the current discovery frame identifier of the current discovery period by using a broadcast before the preset discovery period arrives; or
  • a third aspect of the present invention provides a base station, including:
  • An identifier generating unit configured to generate a current discovery frame identifier of a current discovery period; a broadcast unit, configured to broadcast a current discovery frame identifier of the current discovery period generated by the identifier generation unit, so that the location sent by the base station is received
  • the broadcast terminal acquires a frequency time pattern of the current discovery period according to the current discovery frame identifier of the current discovery period in the broadcast, or acquires a frequency time pattern of the discovery period after the current discovery period.
  • the identifier generating unit is specifically configured to: calculate a current discovery frame identifier of a current discovery period according to a sequence number of the current discovery period and a cycle period of the discovery frame.
  • the identifier generating unit is specifically configured to:
  • the broadcast unit is specifically configured to:
  • the broadcast unit is specifically configured to:
  • the base station sends a broadcast before the preset discovery period arrives, where the broadcast includes a current discovery frame identifier of the current discovery period generated by the identifier generating unit; Or, the base station sends a broadcast in the preset discovery period, where the broadcast includes a current discovery frame identifier of the current discovery period generated by the identifier generating unit.
  • a fourth aspect of the present invention provides a terminal, including:
  • the acquiring unit configured to acquire, according to the current discovery frame identifier of the current discovery period acquired by the receiving unit A time-frequency pattern of the current discovery period, or a time-frequency pattern of the discovery period after the current discovery period.
  • the discovery frame identifier of the current discovery period acquired by the receiving unit is obtained by a sequence number of a current discovery period and a cycle period of the discovery frame.
  • the receiving unit is specifically configured to:
  • the current discovery frame identifier of the current discovery period is received by broadcast during the current discovery period.
  • the receiving unit is specifically configured to: receive by broadcast before the preset discovery period arrives The current discovery frame identifier of the current discovery period; or
  • a fifth aspect of the present invention provides a base station, including: at least one processor, a memory, a bus, and a transmitter, the bus is used to implement a connection between a processor and a memory, and the memory is used to store a program executed by the processor. Code and data;
  • the processor is configured to generate a current discovery frame identifier of a current discovery period, where the transmitter is configured to broadcast a current discovery frame identifier of the current discovery period generated by the processor, so that the location sent by the base station is received.
  • the broadcast terminal acquires a frequency time pattern of the current discovery period according to the current discovery frame identifier of the current discovery period in the broadcast, or acquires a frequency time pattern of the discovery period after the current discovery period.
  • the processor is specifically configured to: calculate a current discovery frame identifier of a current discovery period according to a sequence number of the current discovery period and a cycle period of the discovery frame.
  • the processor is specifically configured to:
  • the transmitter is specifically configured to: send a broadcast before the current discovery period arrives, where the broadcast includes the current discovery generated by the processor The current discovery frame identifier of the time period; or,
  • the transmitter is specifically configured to: send a broadcast before the preset discovery period arrives, where the broadcast includes the The current discovery frame identifier of the current discovery period; or, Sending a broadcast in the preset discovery period, where the broadcast includes a current discovery frame identifier of the current discovery period generated by the processor.
  • a sixth aspect of the present invention provides a terminal, including: at least one processor, a memory, a bus, and a receiver, the bus is used to implement connection and communication between the processor and the memory, and the memory is used to store a program executed by the processor a code and data; the receiver receives a broadcast sent by the base station, and the processor is configured to obtain, from the broadcast, a current discovery frame identifier of a current discovery period;
  • the processor is configured to acquire a time-frequency pattern of the current discovery period according to the current discovery frame identifier of the current discovery period, or acquire a frequency time pattern of the discovery period after the current discovery period.
  • the discovery frame identifier of the current discovery period is obtained by a sequence number of a current discovery period and a cycle period of the discovery frame.
  • the receiver is specifically configured to: receive, by using a broadcast, a current discovery frame identifier of the current discovery period before the current discovery period arrives; or
  • the current discovery frame identifier of the current discovery period is received by broadcast during the current discovery period.
  • the receiver is specifically configured to: if the current discovery period is a preset discovery period,
  • the receiver is specifically configured to: the current discovery frame identifier and the system clock of the terminal according to the preset discovery period Calculating a current discovery frame identifier of the current discovery period.
  • the communication method, the base station, and the terminal provided by the embodiment of the present invention broadcast the current discovery frame identifier of the current discovery period by the base station, so that the terminal acquires the frequency time pattern of the current discovery period according to the current discovery frame identifier of the current discovery period, and solves the existing existing In the technology, when the interval between two adjacent discovery periods is long, the terminal cannot obtain the problem of the frequency pattern of the discovery period.
  • FIG. 1 is a schematic flowchart of a communication method according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a frequency time pattern of a discovery period according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a terminal according to an embodiment of the present invention
  • FIG. 1 is a schematic flowchart of a communication method according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a frequency time pattern of a discovery period according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of a terminal according to an embodiment of the present invention
  • FIG. 1 is a schematic flowchart of a communication method according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a frequency time pattern of a discovery period according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of a terminal according to another embodiment of the present invention.
  • the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example.
  • the embodiments of the present invention are applicable to D2D communication, and are particularly suitable for the scenario of introducing D 2 D communication in an LTE system.
  • the embodiment of the present invention uses L TE as an example for description.
  • the LTE system can usually allocate certain fixed frames as discovery periods to D 2D communication.
  • FIG. 1 is a schematic flowchart diagram of a communication method according to an embodiment of the present invention. The method is performed by a base station. Referring to Figure 1, the method can include the following steps:
  • the base station generates a current discovery frame identifier of the current discovery period.
  • each terminal participating in D 2 D communication is in each discovery period
  • the discovery signal can be sent at a certain frequency unit for detection by other terminals.
  • the current discovery frame identifier is used to identify the frequency time pattern of the discovery period, and the terminal sends or receives the discovery signal according to the frequency time pattern of the discovery period.
  • the base station broadcasts the current discovery frame identifier of the current discovery period, so that the terminal that receives the broadcast sent by the base station acquires the frequency time pattern of the current discovery period according to the current discovery frame identifier of the current discovery period in the broadcast, or obtains the current discovery period.
  • the frequency pattern of the discovery period The base station sends the current discovery frame identifier of the current discovery period in the form of a broadcast, and the terminal that receives the broadcast obtains the frequency pattern of the current discovery period according to the current discovery frame identifier of the current discovery period in the broadcast.
  • the time-frequency pattern of the discovery period after the current discovery period may also be acquired according to the time-frequency pattern of the current discovery period.
  • the current discovery frame identifier of the current discovery period is broadcasted by the base station, so that the terminal acquires the frequency time pattern of the current discovery period according to the current discovery frame identifier of the current discovery period, and solves two adjacent discoveries in the prior art.
  • the terminal cannot obtain the problem of the frequency pattern of the discovery period.
  • i ndex is the current discovery frame identifier of the current discovery period
  • t is the sequence number of the current discovery period
  • N is the cycle period of the discovery frame.
  • Mod is the remainder operation.
  • the formula (1) means: the sequence number of the current discovery period divided by the remainder of the loop period of the discovery frame is the current discovery period.
  • the current discovery frame identifier is the sequence number of the current discovery period divided by the remainder of the loop period of the discovery frame.
  • the frequency-hopping scheme is usually based on the initial value of the frequency-time position, that is, the value of i (0), j (0), and is calculated according to the value of the current discovery period number t, to i (t) of the current discovery period t, The value of j (t), obtain the frequency time position of the current discovery period.
  • the frequency time pattern of the discovery period corresponding to the discovery period number t of 0, 1, 2 shown in FIG. 2, wherein each frequency pattern is 9 terminals with sequence numbers 0 to 8 in the discovery period sequence number t Frequency position.
  • the abscissa corresponds to the time unit j
  • the ordinate corresponds to the frequency domain unit i.
  • the jump pattern for the discovery period with t greater than 2 is cyclically generated according to the jump pattern shown in Fig. 1.
  • the jump pattern cycle period N of the time period is found to be three. Therefore, the current discovery frame identifier of the current discovery period can be calculated according to formula (1).
  • the current discovery frame identifier of the current discovery period may be the relative sequence number of the discovery period sequence number t in the discovery period cycle period, that is, (tmodN).
  • the base station may broadcast the current discovery frame identifier of the current discovery period to the terminal that receives the broadcast, and obtain the current discovery frame identifier of the current discovery period from the broadcast.
  • the current discovery frame identifier is obtained by the sequence number of the current discovery period and the cycle period of the current discovery frame identifier, and the terminal obtains the frequency time pattern of the current discovery period according to the current discovery frame identifier.
  • the base station broadcasts the current discovery frame identifier of the current discovery period, which may include:
  • the base station sends a broadcast before the current discovery period arrives, wherein the broadcast includes the current discovery frame identifier of the current discovery period.
  • the broadcast sent by the base station Before the arrival of each discovery period allocated by the LTE system for the D2D communication, the broadcast sent by the base station includes the current discovery frame identifier of the current discovery period, and the terminal that receives the broadcast obtains the current discovery frame identifier of the current discovery period from the broadcast. Obtaining a time-frequency pattern of the current discovery period according to the current discovery frame identifier of the current discovery period.
  • the base station sends a broadcast during the current discovery period, where the broadcast includes the current discovery frame identifier of the current discovery period.
  • the base station may also send a broadcast including the current discovery frame identifier of the current discovery period in each discovery period allocated by the LTE system for D2D communication, and receive the broadcasted terminal, and obtain the current discovery frame identifier of the current discovery period from the broadcast. Obtaining a time-frequency pattern of the current discovery period according to the current discovery frame identifier of the current discovery period.
  • the base station sends the current discovery frame identifier of the current discovery period by broadcast before the current discovery period or the current discovery time, so that the terminal that receives the broadcast can obtain the current discovery period according to the current discovery frame identifier of the current discovery period.
  • the time-frequency pattern of the time-frequency pattern or the discovery period after the current discovery period.
  • the base station may also send a broadcast of the current discovery frame identifier including the current discovery period in a partial discovery period allocated by the LTE system for the D2D communication. If the current discovery period is a preset discovery period, the base station broadcasts the current discovery frame identifier of the current discovery period, and the method includes: the base station sends a broadcast before the preset discovery period arrives, where the broadcast includes the current The current discovery frame identifier of the current period of time; or, the base station sends a broadcast within a preset discovery period, where the broadcast includes the current discovery frame identifier of the current discovery period.
  • the preset discovery period may include a partial discovery period in the discovery period allocated by the LTE system for D2D communication. Specifically, the following options may be included:
  • the loop period of the found frame is N, and N includes an integer divisible by 2.
  • the frame identifier obtains the frequency pattern of the current discovery period.
  • the loop period of the found frame is N, and N includes an integer divisible by 2.
  • the terminal obtains (2k mod N) according to the current discovery frame identifier of the current discovery period, and obtains the current discovery period sequence number, thereby obtaining the frequency time pattern of the current discovery period.
  • the loop period of the found frame is N, and N includes an integer divisible by 2.
  • the current discovery frame of the time period identifies the time-frequency pattern of the current discovery period.
  • the loop period of the found frame is N, and N includes an integer divisible by 2.
  • the terminal obtains (2k+l mod N) according to the current discovery frame identifier of the current discovery period, and obtains the current discovery period sequence number, thereby obtaining a frequency time pattern of the current discovery period.
  • Scenario 5 The loop period of the found frame is ⁇ , and ⁇ includes an integer divisible by 3.
  • the system can be broadcast during the 3k Discovery period or before arrival (3k mod N)
  • the terminal obtains the frequency time pattern of the current discovery period according to the current discovery frame identifier of the current discovery period.
  • Scenario 6 The cycle period of the found frame is N, and N includes an integer divisible by 3.
  • the terminal obtains (3k mod N) according to the current discovery frame identifier of the current discovery period, and obtains the current discovery period sequence number, thereby obtaining the frequency time pattern of the current discovery period.
  • the loop period of the found frame is N, and N includes an integer divisible by 3.
  • the current discovery frame of the time period identifies the time-frequency pattern of the current discovery period.
  • Scenario 8 The loop period of the found frame is N, and N includes an integer divisible by 3.
  • the terminal obtains (3k+l mod N) according to the current discovery frame identifier of the current discovery period, and obtains the current discovery period sequence number, thereby obtaining the frequency time pattern of the current discovery period.
  • Scenario 9 The loop period of the found frame is ⁇ , ⁇ includes an integer divisible by 3.
  • the current discovery frame of the time period identifies the time-frequency pattern of the current discovery period.
  • Scenario 10 The loop period of the found frame is N, and N includes an integer divisible by 3.
  • FIG. 3 is a schematic flowchart diagram of a communication method according to another embodiment of the present invention. This embodiment is executed by the terminal. Referring to FIG. 3, the method may include the following steps:
  • the terminal receives the broadcast sent by the base station, and obtains the current discovery frame identifier of the current discovery period from the broadcast.
  • the current discovery frame identifier is used to identify a frequency time pattern of the discovery period, and the terminal sends or receives the discovery signal according to the frequency time pattern of the discovery period.
  • the discovery frame identifier of the discovery period is obtained by the sequence number of the current discovery period and the cycle period of the discovery frame. Specifically, reference can be made to formula (1).
  • the terminal receives the broadcast sent by the base station, and obtains the current discovery frame identifier of the current discovery period from the broadcast, and may include: the terminal receives the current discovery frame identifier of the current discovery period by broadcasting before the current discovery period arrives.
  • the broadcast sent by the base station Before the arrival of each discovery period allocated by the LTE system for the D2D communication, the broadcast sent by the base station includes the current discovery frame identifier of the current discovery period, and the terminal that receives the broadcast obtains the current discovery frame identifier of the current discovery period from the broadcast. Alternatively, the terminal receives the current discovery frame identifier of the current discovery period by broadcast during the current discovery period.
  • the base station may also send a broadcast including the current discovery frame identifier of the current discovery period in each discovery period allocated by the LTE system for the D2D communication, and the terminal that receives the broadcast obtains the current discovery frame identifier of the current discovery period from the broadcast.
  • the terminal receives the current discovery frame identifier of the current discovery period by broadcasting before the current discovery period or the current discovery time, and obtains the frequency time pattern of the current discovery period according to the current discovery frame identifier.
  • the base station may also perform D2D communication in the LTE system.
  • the allocated partial discovery period sends a broadcast containing the current discovery frame identifier of the current discovery period.
  • the terminal 301 receives the broadcast sent by the base station, and obtains the current discovery frame identifier of the current discovery period from the broadcast, which may include:
  • the terminal receives the current discovery frame identifier of the current discovery period by broadcast before the preset discovery period arrives. Alternatively, the terminal receives the current discovery frame identifier of the current discovery period by broadcast in a preset discovery period.
  • the preset discovery period may include a partial discovery period in the discovery period allocated by the LTE system for D2D communication. For details, refer to the above schemes 1 to 100.
  • the terminal receives the broadcast sent by the base station in step 301, and obtains the current discovery frame identifier of the current discovery period from the broadcast, which may include: The current discovery frame identifier of the discovery period and the system clock calculate the current discovery frame identifier of the current discovery period.
  • the terminal receives the current discovery frame identifier of the preset discovery period, and calculates the current discovery frame identifier of the discovery period after the preset discovery period according to the current discovery frame identifier and the system clock of the preset discovery period (ie, The current discovery frame identifier of the current discovery period).
  • the terminal receives the current discovery frame identifier of the current discovery period by broadcasting before or after the preset discovery period arrives, and obtains the frequency time pattern of the current discovery period according to the current discovery frame identifier of the current discovery period in the broadcast.
  • the terminal acquires a frequency time pattern of the current discovery period according to the current discovery frame identifier of the current discovery period, or acquires a frequency time pattern of the discovery period after the current discovery period.
  • the terminal acquires a frequency time pattern of the current discovery period according to an initial value of the frequency time position, a current discovery frame identifier of the current discovery period, and a jump function, or acquires a frequency time pattern of the discovery period after the current discovery period.
  • the jump function is a function of recursing the frequency-time position of the current discovery period to the frequency-time position of the next discovery period, that is, the frequency-time positional relationship of the discovery signal in the adjacent discovery period. For example, the jump functions shown in equations (2) and (3).
  • the time-frequency pattern of the terminal in the current discovery period can be obtained, and the discovery signal is sent at the frequency-time position in the frequency-time pattern to facilitate discovery by other terminals.
  • the terminal may further obtain the frequency time position of the other terminal in the current discovery period according to the current discovery frame identifier according to the current discovery period, referring to formulas (2) and (3).
  • the terminal may obtain the discovery frame identifier of the discovery period before the current discovery period according to the current discovery frame identifier of the current discovery period, and the frequency location of the other terminal detected according to the discovery frame identifier and the discovery period before the current discovery period.
  • an initial value of the frequency-time position of the other terminal may be calculated, and according to the initial value and the current discovery frame identifier of the current discovery period, the frequency-time pattern of other terminals in the current discovery period may be obtained, where The discovery signals of other terminals are received at the time-frequency positions of other terminals in the time-frequency pattern.
  • the discovery period of the other terminal may be jointly detected by the current discovery period and the discovery period before the current discovery period.
  • the terminal may perform end-to-end communication with other terminals.
  • the terminal can further obtain the frequency time pattern of the discovery period after the current discovery period according to the frequency time pattern of the current discovery period, and can also obtain the frequency time pattern of the discovery period of the entire cycle period. If the terminal detects the discovery signal of other terminals during the current discovery period, but the effect of the discovery signal is poor due to interference or poor channel quality, the terminal may be in the discovery period after the current discovery period, for example, the next During the discovery period, the discovery signals of other terminals are detected again at the obtained time-frequency positions of other terminals, and may also be jointly detected. If the detection is successful, end-to-end communication with other terminals may be performed.
  • the terminal may obtain the frequency time pattern of the terminal in the current discovery period according to the formula (2) and (3) according to the current discovery frame identifier according to the current discovery period.
  • the frequency time position corresponding to the frequency pattern is sent to the discovery signal so that other terminals find themselves. It is also possible to obtain a frequency time pattern of the discovery period of the terminal after the current discovery period according to the frequency time pattern of the current discovery period, and refer to formulas (2) and (3), and send a discovery signal at a frequency time position corresponding to the frequency pattern. So that other terminals find themselves.
  • the terminal calculates the current discovery frame identifier of the current discovery period according to the current discovery frame identifier and the system clock of the preset discovery period received by the broadcast, according to the obtained The current discovery frame identifier of the current discovery period obtains a frequency time pattern of the current discovery period.
  • the terminal obtains the current discovery frame identifier of the current discovery period by using the broadcast sent by the base station, and obtains the frequency time pattern of the current discovery period or the discovery period after the current discovery period according to the current discovery frame identifier, which solves the prior art.
  • the terminal cannot obtain the problem of the frequency pattern of the discovery period when the interval between two adjacent discovery periods is long.
  • the base station is configured to perform the communication method of the foregoing embodiment, and the base station includes: an identifier generating unit 4 1 and a broadcasting unit 42.
  • the identifier generating unit 4 1 is configured to generate a current discovery frame identifier of the current discovery period.
  • the current discovery frame identifier is used to identify the frequency time pattern of the discovery period, and the terminal sends or receives the discovery signal according to the frequency time pattern of the discovery period.
  • the broadcast unit 4 2 is configured to use the current discovery frame identifier of the current discovery period generated by the broadcast identifier generating unit, so that the terminal that receives the broadcast sent by the base station acquires the frequency of the current discovery period according to the current discovery frame identifier of the current discovery period in the broadcast. Time pattern, or a time pattern of the discovery period after the current discovery period.
  • the base station sends the current discovery frame identifier of the current discovery period in the form of a broadcast, and the terminal that receives the broadcast obtains the frequency time pattern of the current discovery period according to the current discovery frame identifier of the current discovery period in the broadcast.
  • the time-frequency pattern of the discovery period after the current discovery period may also be acquired according to the time-frequency pattern of the current discovery period.
  • the current discovery frame identifier of the current discovery period is broadcasted by the base station, so that the terminal acquires the frequency time pattern of the current discovery period according to the current discovery frame identifier of the current discovery period, and solves two adjacent discovery periods in the prior art.
  • the terminal cannot obtain the problem of the frequency pattern of the discovery period.
  • the identifier generating unit 4 1 is specifically configured to: calculate a current discovery period according to the sequence number of the current discovery period and the cycle period of the discovery frame.
  • the current discovery frame identifier is specifically configured to: calculate a current discovery period according to the sequence number of the current discovery period and the cycle period of the discovery frame.
  • i ndex is the current discovery frame identifier of the current discovery period
  • t is the sequence number of the current discovery period
  • N is the cycle period of the discovery frame
  • mod is the remainder operation.
  • the base station may broadcast the current discovery frame identifier of the current discovery period to the terminal that receives the broadcast, and obtain the current discovery frame identifier of the current discovery period from the broadcast.
  • the current discovery frame identifier is obtained by the sequence number of the current discovery period and the cycle period of the current discovery frame identifier, and the terminal obtains the frequency time pattern of the current discovery period according to the current discovery frame identifier.
  • the broadcast unit 42 is specifically configured to: send a broadcast before the current discovery period arrives, where the broadcast includes the current discovery frame identifier of the current discovery period generated by the identifier generation unit; or
  • the broadcast is transmitted during the current discovery period, wherein the broadcast includes a current discovery frame identifier of the current discovery period generated by the identifier generation unit.
  • the broadcast sent by the base station Before the arrival of each discovery period allocated by the LTE system for the D2D communication, the broadcast sent by the base station includes the current discovery frame identifier of the current discovery period, and the terminal that receives the broadcast obtains the current discovery frame identifier of the current discovery period from the broadcast. Obtaining a time-frequency pattern of the current discovery period according to the current discovery frame identifier of the current discovery period.
  • the base station sends a broadcast during the current discovery period, where the broadcast includes the current discovery frame identifier of the current discovery period.
  • the base station may also send a broadcast including the current discovery frame identifier of the current discovery period in each discovery period allocated by the LTE system for D2D communication, and receive the broadcasted terminal, and obtain the current discovery frame identifier of the current discovery period from the broadcast. Obtaining a time-frequency pattern of the current discovery period according to the current discovery frame identifier of the current discovery period.
  • the base station sends the current discovery frame identifier of the current discovery period by broadcast before the current discovery period or the current discovery time, so that the terminal that receives the broadcast can obtain the current discovery period according to the current discovery frame identifier of the current discovery period. Frequency pattern or The time-frequency pattern of the discovery period after the current discovery period.
  • the base station may also send a broadcast of the current discovery frame identifier including the current discovery period in a partial discovery period allocated by the LTE system for D2D communication.
  • the broadcast unit 42 is configured to: send a broadcast before a preset discovery period arrives, where the broadcast includes a current discovery frame identifier that identifies a current discovery period generated by the generating unit; or
  • the broadcast is transmitted within a preset discovery period, wherein the broadcast includes a current discovery frame identifier of the current discovery period generated by the identifier generation unit.
  • the preset discovery period may include a partial discovery period in a discovery period allocated by the LTE system for D 2 D communication.
  • the base station sends the current discovery frame identifier of the current discovery period by broadcast before or after the preset discovery period arrives, so that the terminal receiving the broadcast obtains the current discovery period according to the current discovery frame identifier of the current discovery period in the broadcast.
  • Frequency pattern FIG. 5 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • the terminal is configured to perform the communication method of the above embodiment, and the terminal comprises: a receiving unit 5 1 and an obtaining unit 52.
  • the receiving unit 5 1 is configured to receive a broadcast sent by the base station, and obtain, from the broadcast, a current discovery frame identifier of the current discovery period.
  • the current discovery frame identifier is used to identify the time-frequency pattern of the discovery period, and the terminal transmits or receives the discovery signal according to the frequency pattern of the discovery period.
  • the discovery frame identifier of the discovery period acquired by the receiving unit is obtained by the sequence number of the current discovery period and the cycle period of the discovery frame. Specifically, reference can be made to formula (1).
  • the obtaining unit 52 is configured to acquire a time-frequency pattern of the current discovery period according to the current discovery frame identifier of the current discovery period acquired by the receiving unit, or acquire a frequency time pattern of the discovery period after the current discovery period.
  • the terminal obtains the current discovery frame identifier of the current discovery period by using the broadcast sent by the base station, and obtains the frequency time pattern of the current discovery period or the discovery period after the current discovery period according to the current discovery frame identifier, which solves the prior art.
  • the terminal cannot obtain the problem of the frequency pattern of the discovery period when the interval between two adjacent discovery periods is long.
  • the receiving unit 5 1 is specifically configured to: receive, by using a broadcast, a current discovery frame identifier of a current discovery period before the current discovery period arrives.
  • the broadcast sent by the base station Before the arrival of each discovery period allocated by the LTE system for the D2D communication, the broadcast sent by the base station includes the current discovery frame identifier of the current discovery period, and the terminal that receives the broadcast obtains the current discovery frame identifier of the current discovery period from the broadcast. Or, the current discovery frame identifier of the current discovery period is received by broadcast during the current discovery period.
  • the base station may also send a broadcast of the current discovery frame identifier including the current discovery period in each discovery period allocated by the LTE system for the D2D communication, and the terminal that receives the broadcast obtains the current discovery frame identifier of the current discovery period from the broadcast.
  • the terminal receives the current discovery frame identifier of the current discovery period by broadcasting before the current discovery period or the current discovery time, and obtains the frequency time pattern of the current discovery period according to the current discovery frame identifier.
  • the receiving unit 51 is specifically configured to: receive, by using a broadcast, a current discovery frame identifier of a current discovery period before the preset discovery period arrives; or, in a preset The current discovery frame identifier of the current discovery period is received by broadcast during the discovery period.
  • the preset discovery period may include a partial discovery period in a discovery period allocated by the LTE system for D2D communication. For details, refer to the above schemes 1 to 100.
  • the receiving unit 51 is specifically configured to: calculate a current discovery frame identifier of the current discovery period according to the current discovery frame identifier of the preset discovery period and the system clock.
  • the terminal receives the current discovery frame identifier of the preset discovery period, and calculates the preset discovery period according to the current discovery frame identifier and the system clock of the preset discovery period.
  • the current discovery frame identifier of the subsequent discovery period ie, the current discovery frame identifier of the current discovery period).
  • the terminal can receive the current discovery frame identifier of the current discovery period by broadcasting before or after the preset discovery period arrives, and obtain the frequency time pattern of the current discovery period according to the current discovery frame identifier of the current discovery period in the broadcast.
  • FIG. 6 is a schematic structural diagram of a base station according to another embodiment of the present invention, where the base station is used to implement the communication method provided by the foregoing embodiment.
  • the bus 63 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus or an Extended Industry Standard Architecture (Extended Industry Standard Architecture). Referred to as EISA) bus, etc., it is not limited here.
  • the bus 63 can be divided into an address bus, a data bus, a control bus, and the like.
  • the memory 62 is used to store data or executable program code, where the program code includes computer operation instructions, which may be: an operating system, an application, and the like.
  • the memory 62 may include a high speed RAM memory and may also include a non-volatile memory such as at least one disk memory.
  • the processor 61 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more configured to implement the embodiments of the present invention. integrated circuit.
  • the processor 61 is for implementing the communication method in the above embodiment by executing the program code in the memory 62.
  • the processor 61 is configured to generate a current discovery frame identifier of the current discovery period.
  • the transmitter 64 is configured to broadcast the current discovery frame identifier of the current discovery period generated by the processor 61, so that the terminal that receives the broadcast sent by the base station acquires the frequency of the current discovery period according to the current discovery frame identifier of the current discovery period in the broadcast.
  • the current discovery frame identifier is used to identify the frequency time pattern of the discovery period, and the terminal sends or receives the discovery signal according to the frequency time pattern of the discovery period.
  • the base station sends the current discovery frame identifier of the current discovery period in the form of a broadcast, and the terminal that receives the broadcast obtains the frequency time pattern of the current discovery period according to the current discovery frame identifier of the current discovery period in the broadcast.
  • the time-frequency pattern of the discovery period after the current discovery period may also be acquired according to the time-frequency pattern of the current discovery period.
  • the current discovery frame identifier of the current discovery period is broadcasted by the base station, so that the terminal acquires the frequency time pattern of the current discovery period according to the current discovery frame identifier of the current discovery period, and solves two adjacent discovery periods in the prior art.
  • the terminal cannot obtain the problem of the frequency pattern of the discovery period.
  • the processor 61 is specifically configured to: calculate a current discovery frame identifier of the current discovery period according to a sequence number of the current discovery period and a cycle period of the discovery frame.
  • i ndex is the current discovery frame identifier of the current discovery period
  • t is the sequence number of the current discovery period
  • N is the cycle period of the discovery frame
  • mod is the remainder operation.
  • the base station may broadcast the current discovery frame identifier of the current discovery period to the terminal that receives the broadcast, and obtain the current discovery frame identifier of the current discovery period from the broadcast.
  • the current discovery frame identifier is obtained by the sequence number of the current discovery period and the cycle period of the current discovery frame identifier, and the terminal obtains the frequency time pattern of the current discovery period according to the current discovery frame identifier.
  • the transmitter 64 is specifically configured to: send a broadcast before the current discovery period arrives, where the broadcast includes a current discovery frame identifier of a current discovery period generated by the processor. Or transmitting a broadcast in a current discovery period, where the broadcast includes a current discovery frame identifier of a current discovery period generated by the processor.
  • the base station passes the time before the current discovery time period or the current discovery time The current discovery frame identifier of the current discovery period is broadcasted, so that the terminal that receives the broadcast can obtain the frequency time pattern of the current discovery period or the frequency time pattern of the discovery period after the current discovery period according to the current discovery frame identifier of the current discovery period.
  • the base station may also send a broadcast of the current discovery frame identifier including the current discovery period in a partial discovery period allocated by the LTE system for D2D communication.
  • the transmitter 64 is specifically configured to: send a broadcast before a preset discovery period arrives, where the broadcast includes a current discovery frame identifier of a current discovery period generated by the processor; or, send a broadcast in a preset discovery period, where, the broadcast A current discovery frame identifier of the current discovery period generated by the processor.
  • the preset discovery period may include a partial discovery period in a discovery period allocated by the LTE system for D 2 D communication.
  • the base station sends the current discovery frame identifier of the current discovery period by broadcast before or after the preset discovery period arrives, so that the terminal receiving the broadcast obtains the current discovery period according to the current discovery frame identifier of the current discovery period in the broadcast. Frequency pattern.
  • FIG. 7 is a schematic structural diagram of a terminal according to another embodiment of the present invention.
  • the terminal is for performing the communication method of the above embodiment.
  • the terminal includes: at least one processor 71, a memory 72, a bus 73, and a receiver 74 for implementing connection and communication between the processor 71 and the memory 72.
  • the memory 72 is configured to store program code executed by the processor 71.
  • the bus 73 may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (abbreviated as an Industry Standard Architecture). EISA) Bus, etc., is not limited here.
  • the bus 73 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 7, but it does not mean that there is only one bus or one type of bus.
  • the memory 72 is used to store data or executable program code, where the program code includes computer operating instructions, which may be: an operating system, an application, or the like.
  • the memory 72 may include a high speed RAM memory and may also include a non-volatile memory. For example at least one disk storage.
  • the processor 71 may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more configured to implement the embodiments of the present invention. integrated circuit.
  • the processor 71 is for implementing the communication method in the above embodiment by executing the program code in the memory 72.
  • the receiver 74 receives the broadcast sent by the base station, and the processor 71 is configured to obtain the current discovery frame identifier of the current discovery period from the broadcast.
  • the current discovery frame identifier is used to identify the time-frequency pattern of the discovery period, and the terminal transmits or receives the discovery signal according to the frequency pattern of the discovery period.
  • the discovery frame identifier of the discovery period acquired by the receiving unit is obtained by the sequence number of the current discovery period and the cycle period of the discovery frame. Specifically, reference can be made to formula (1).
  • the processor 7 1 is configured to acquire a time-frequency pattern of the current discovery period according to the current discovery frame identifier of the current discovery period, or acquire a frequency-time pattern of the discovery period after the current discovery period.
  • the terminal obtains the current discovery frame identifier of the current discovery period by using the broadcast sent by the base station, and obtains the frequency time pattern of the current discovery period or the discovery period after the current discovery period according to the current discovery frame identifier, which solves the prior art.
  • the terminal cannot obtain the problem of the frequency pattern of the discovery period when the interval between two adjacent discovery periods is long.
  • the receiver 74 is specifically configured to: receive, by using a broadcast, a current discovery frame identifier of a current discovery period before the current discovery period arrives; or
  • the current discovery frame identifier of the current discovery period is received by broadcast during the current discovery period.
  • the terminal receives the current discovery frame identifier of the current discovery period by broadcasting before the current discovery period or the current discovery time, and obtains the frequency time pattern of the current discovery period according to the current discovery frame identifier.
  • the receiver 74 is specifically configured to: The terminal receives the current discovery frame identifier of the current discovery period by broadcast before the preset discovery period arrives. Alternatively, the terminal receives the current discovery frame identifier of the current discovery period by broadcast in a preset discovery period.
  • the preset discovery period may include a partial discovery period in a discovery period allocated by the LTE system for D 2 D communication. For details, refer to the above schemes 1 to 100.
  • the receiver 74 is specifically configured to: calculate, by the terminal, the current discovery frame identifier of the current discovery period according to the current discovery frame identifier of the preset discovery period and the system clock.
  • the terminal receives the current discovery frame identifier of the preset discovery period, and calculates the current discovery frame identifier of the discovery period after the preset discovery period according to the current discovery frame identifier and the system clock of the preset discovery period (ie, The current discovery frame identifier of the current discovery period).
  • the terminal can receive the current discovery frame identifier of the current discovery period by broadcasting before or after the preset discovery period arrives, and obtain the frequency time pattern of the current discovery period according to the current discovery frame identifier of the current discovery period in the broadcast.
  • computer readable media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage media or other magnetic storage device, or can be used for carrying or storing in the form of an instruction or data structure.
  • Any connection may suitably be a computer readable medium.
  • the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable , fiber optic cable, twisted pair, DSL or wireless technologies such as infrared, wireless, and microwave are included in the fixing of the associated medium.
  • a disk and a disc include a compact disc (CD), a laser disc, a disc, a digital versatile disc (DVD), a floppy disc, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.
  • CD compact disc
  • DVD digital versatile disc
  • a floppy disc a digital versatile disc
  • Blu-ray disc wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data.

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Abstract

本发明实施例公开一种通信方法、基站及终端,应用于通信领域,以解决现有技术中以解决现有技术中由于当两个相邻的发现时段间隔较长时终端无法获得发现时段的频时图样的问题。该方法包括:基站生成当前发现时段的当前发现帧标识;基站广播所述当前发现时段的当前发现帧标识,以使收到所述基站发送的所述广播的终端根据所述广播中的所述当前发现时段的当前发现帧标识获取当前发现时段的频时图样,或者获取所述当前发现时段之后的发现时段的频时图样。本发明实施例适用于通信方法。

Description

一种通信方法、 基站及终端 技术领域 本发明涉及通信领域, 尤其涉及一种通信方法、 基站及终端。 背景技术
端到端通信 ( Device to Device, 简称 D2D)是指终端 ( User
Equipment, 简称 UE )之间不经过基站而直接进行的通信方式。 D2D 技术可以起到减轻宏网负担, 增大 UE 间通信速率的作用。
UE 间为了实现相互间的直接通信, 必须先相互发现。 为了在 长期演进 ( Long Term Evolution, 简称 LTE ) 系统中引入 D2D 通 信方式, 需要在 LTE 系统中以一定的规律插入发现 ( Discovery ) 时段, 诸 UE在 Discovery时段中发射 Discovery信号, 以使得其 他 UE 发现自 己。 为了不影响现有 LTE 系统的蜂窝通信, 每两个 Discovery时段之间的时间间隔可能会比较长, 例如数百毫秒到数 秒时间。 每个 Discovery时段从时间上分解为若干个时间单元, 用 'eJ表示; 每个时间单元可以按照相同的规则频分成若干个频域单 元, 用 e/表示。 我们称第 j 个时间单元上的第 i 个频域单元为第 (i,: ί)个频时单元。 在每个 Discovery 时段中 , 每个参与 D2D Discovery 的 UE都可以在某个频时单元发送 Discovery信号, 以 便其他 UE检测。一般考虑到同时发送 Discovery信号的 UE无法互 相听到, 所以需要对每个 Discovery时段的图样进行频时跳转, 即 令每个 UE在每个 Di sco very时段内发送 D i s covery信号的频时位 置不同, 使得每个 UE都有机会被其它所有 UE发现, 该 Discovery 时段的图样也就是发现时段的频时图样。 但是,在 LTE 系统中,当两个相邻的 D i s covery时段间隔较长, UE无法获得发现时段的频时图样。 发明内容 本发明实施例提供一种通信方法、 基站及终端, 以解决现有技 术中由于当两个相邻的 Discovery 时段间隔较长时终端无法获得 发现时段的频时图样的问题。 本发明的第一方面提供一种通信方法, 包括:
基站生成当前发现时段的当前发现帧标识; 基站广播所述当前发现时段的当前发现帧标识, 以使收到所述基站 发送的所述广播的终端根据所述广播中的所述当前发现时段的当前发 现帧标识获取当前发现时段的频时图样, 或者获取所述当前发现时段之 后的发现时段的频时图样。 结合第一方面, 在第一种可能的实现方式中, 所述基站获得当前发 现时段的当前发现帧标识, 包括: 所述基站根据当前发现时段的序号和发现帧的循环周期计算当前 发现时段的当前发现帧标识。 结合第一方面的第一种可能的实现方式, 在第二种可能的实现方式 中, 所述基站根据当前发现时段的序号和发现帧的循环周期计算当前发 现时段的当前发现帧标识, 包括: 所述基站根据公式 i ndex=t mod N计算当前发现时段的当前发现帧 标识;
其中, i ndex 为所述当前发现时段的当前发现帧标识, t 为所述当 前发现时段的序号, N为发现帧的循环周期, mod为求余运算。 结合第一方面, 在第三种可能的实现方式中, 所述基站广播所述当 前发现时段的当前发现帧标识, 包括: 所述基站在所述当前发现时段到来之前送广播, 其中, 所述广播包 括所述当前发现时段的当前发现帧标识; 或者, 所述基站在所述当前发现时段内发送广播, 其中, 所述广播包括所 述当前发现时段的当前发现帧标识。 结合第一方面, 在第四种可能的实现方式中, 所述基站广播所述当 前发现时段的当前发现帧标识, 包括: 所述基站在所述预设的发现时段到来之前发送广播, 其中, 所述广 播包括所述当前发现时段的当前发现帧标识; 或者,
所述基站在所述预设的发现时段内发送广播, 其中, 所述广播包括 所述当前发现时段的当前发现帧标识。 本发明的第二方面提供一种通信方法, 包括:
终端接收基站发送的广播, 从所述广播中获取当前发现时段的当前 发现帧标识;
根据所述当前发现时段的当前发现帧标识获取所述当前发现时段 的频时图样, 或者获取所述当前发现时段之后的发现时段的频时图样。
结合第二方面, 在第一种可能的实现方式中, 所述当前发现时段的 发现帧标识由当前发现时段的序号及发现帧的循环周期获得。
结合第二方面, 在第二种可能的实现方式中, 所述终端接收基站发 送的广播, 从所述广播中获取当前发现时段的当前发现帧标识, 包括: 所述终端在所述当前发现时段到来之前通过广播接收所述当前发 现时段的当前发现帧标识; 或者,
所述终端在所述当前发现时段内通过广播接收所述当前发现时段 的当前发现帧标识。
结合第二方面, 在第三种可能的实现方式中, 若所述当前发现时 段为预设的发现时段, 则所述终端接收基站发送的广播, 从所述广播中 获取当前发现时段的当前发现帧标识, 包括: 所述终端在所述预设的发现时段到来之前通过广播接收所述当前 发现时段的当前发现帧标识; 或者,
所述终端在所述预设的发现时段内通过广播接收所述当前发现时 段的当前发现帧标识; 若所述当前发现时段为所述预设的发现时段之后的发现时段, 贝 'J终 端接收基站发送的广播, 从所述广播中获取当前发现时段的当前发现帧 标识, 包括: 所述终端根据所述预设的发现时段的当前发现帧标识及系统时钟 计算所述当前发现时段的当前发现帧标识。 本发明的第三方面提供一种基站, 包括:
标识生成单元, 用于生成当前发现时段的当前发现帧标识; 广播单元, 用于广播所述标识生成单元生成的所述当前发现时段的 当前发现帧标识, 以使收到所述基站发送的所述广播的终端根据所述广 播中的所述当前发现时段的当前发现帧标识获取当前发现时段的频时 图样, 或者获取所述当前发现时段之后的发现时段的频时图样。
结合第三方面, 在第一种可能的实现方式中,, 所述标识生成单元, 具体用于: 根据当前发现时段的序号和发现帧的循环周期计算当前发现时段 的当前发现帧标识。
结合第三方面的第一种可能的实现方式, 在第二种可能的实现方式 中, 所述标识生成单元, 具体用于:
根据公式 i ndex= t mod N计算当前发现时段的当前发现帧标识; 其中, i ndex 为所述当前发现时段的当前发现帧标识, t 为所述当 前发现时段的序号, N为发现帧的循环周期, mod为求余运算。 结合第三方面, 在第三种可能的实现方式中, 所述广播单元, 具体 用于:
在所述当前发现时段到来之前送广播, 其中, 所述广播包括所述标 识生成单元生成的所述当前发现时段的当前发现帧标识; 或者,
在所述当前发现时段内发送广播, 其中, 所述广播包括所述标识生 成单元生成的所述当前发现时段的当前发现帧标识。
结合第三方面, 在第四种可能的实现方式中, 所述广播单元, 具体 用于:
所述基站在所述预设的发现时段到来之前发送广播, 其中, 所述广 播包括所述标识生成单元生成的所述当前发现时段的当前发现帧标识; 或者, 所述基站在所述预设的发现时段内发送广播, 其中, 所述广播包括 所述标识生成单元生成的所述当前发现时段的当前发现帧标识。 本发明的第四方面提供一种终端, 包括:
接收单元, 用于接收基站发送的广播, 从所述广播中获取当前发现 时段的当前发现帧标识; 获取单元, 用于根据所述接收单元获取的所述当前发现时段的当前 发现帧标识获取所述当前发现时段的频时图样, 或者获取所述当前发现 时段之后的发现时段的频时图样。 结合第四方面, 在第一种可能的实现方式中, 所述接收单元获取的 所述当前发现时段的发现帧标识由当前发现时段的序号及发现帧的循 环周期获得。
结合第四方面, 在第二种可能的实现方式中, 所述接收单元, 具体 用于:
在所述当前发现时段到来之前通过广播接收所述当前发现时段的 当前发现帧标识; 或者,
在所述当前发现时段内通过广播接收所述当前发现时段的当前发 现帧标识。 结合第四方面, 在第三种可能的实现方式中, 若所述当前发现时 段为预设的发现时段, 则所述接收单元具体用于: 在所述预设的发现时段到来之前通过广播接收所述当前发现时段 的当前发现帧标识; 或者,
在所述预设的发现时段内通过广播接收所述当前发现时段的当前 发现帧标识; 若所述当前发现时段为所述预设的发现时段之后的发现时段, 贝 'J所 述接收单元具体用于: 根据所述预设的发现时段的当前发现帧标识及系统时钟计算所述 当前发现时段的当前发现帧标识。 本发明的第五方面提供一种基站, 包括: 至少一个处理器、 存储器、 总线、 及发射机, 总线用于实现处理器、 存储器之间的连接及通信, 存 储器用于存储处理器执行的程序代码及数据;
其中所述处理器用于生成当前发现时段的当前发现帧标识; 所述发射机用于广播所述处理器生成的所述当前发现时段的当前 发现帧标识, 以使收到所述基站发送的所述广播的终端根据所述广播中 的所述当前发现时段的当前发现帧标识获取当前发现时段的频时图样, 或者获取所述当前发现时段之后的发现时段的频时图样。 结合第五方面,在第一种可能的实现方式中,所述处理器具体用于: 根据当前发现时段的序号和发现帧的循环周期计算当前发现时段 的当前发现帧标识。
结合第五方面的第一种可能的实现方式, 在第二种可能的实现方式 中, 所述处理器具体用于:
根据公式 i ndex= t mod N计算当前发现时段的当前发现帧标识; 其中, i ndex 为所述当前发现时段的当前发现帧标识, t 为所述当 前发现时段的序号, N为发现帧的循环周期, mod为求余运算。 结合第五方面,在第三种可能的实现方式中,所述发射机具体用于: 在所述当前发现时段到来之前送广播, 其中, 所述广播包括所述处 理器生成的所述当前发现时段的当前发现帧标识; 或者,
在所述当前发现时段内发送广播, 其中, 所述广播包括所述处理器 生成的所述当前发现时段的当前发现帧标识。 结合第五方面,在第四种可能的实现方式中,所述发射机具体用于: 在所述预设的发现时段到来之前发送广播, 其中, 所述广播包括所 述处理器生成的所述当前发现时段的当前发现帧标识; 或者, 在所述预设的发现时段内发送广播, 其中, 所述广播包括所述处理 器生成的所述当前发现时段的当前发现帧标识。 本发明的第六方面提供一种终端, 包括: 至少一个处理器、 存储器、 总线、 及接收机, 总线用于实现处理器、 存储器之间的连接及通信, 存 储器用于存储处理器执行的程序代码及数据; 所述接收机接收基站发送的广播, 所述处理器用于从所述广播中获 取当前发现时段的当前发现帧标识;
所述处理器用于根据所述当前发现时段的当前发现帧标识获取所 述当前发现时段的频时图样, 或者获取所述当前发现时段之后的发现时 段的频时图样。。 结合第六方面, 在第一种可能的实现方式中, 所述当前发现时段的 发现帧标识由当前发现时段的序号及发现帧的循环周期获得。 结合第六方面,在第二种可能的实现方式中,所述接收机具体用于: 在所述当前发现时段到来之前通过广播接收所述当前发现时段的 当前发现帧标识; 或者,
在所述当前发现时段内通过广播接收所述当前发现时段的当前发 现帧标识。
结合第六方面, 在第三种可能的实现方式中, 其特征在于, 若所 述当前发现时段为预设的发现时段, 则所述接收机具体用于:
所述终端在所述预设的发现时段到来之前通过广播接收所述当前 发现时段的当前发现帧标识; 或者,
所述终端在所述预设的发现时段内通过广播接收所述当前发现时 段的当前发现帧标识; 若所述当前发现时段为所述预设的发现时段之后的发现时段, 贝 'J所 述接收机具体用于: 所述终端根据所述预设的发现时段的当前发现帧标识及系统时钟 计算所述当前发现时段的当前发现帧标识。 本发明实施例提供的通信方法、 基站及终端, 通过基站广播当 前发现时段的当前发现帧标识, 以使终端根据当前发现时段的当前发现 帧标识获取当前发现时段的频时图样, 解决了现有技术中两个相邻的 发现时段间隔较长时终端无法获得发现时段的频时图样的问题。 附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将 对实施例或现有技术描述中所需要使用的附图作简单地介绍, 显而易见 地, 下面描述中的附图仅仅是本发明的一些实施例。 图 1为本发明实施例提供的一种通信方法的流程示意图; 图 2为本发明实施例提供的一种发现时段的频时图样的示意图; 图 3为本发明又一实施例提供的一种通信方法的流程示意图; 图 4为本发明实施例提供的一种基站的结构示意图; 图 5为本发明实施例提供的一种终端的结构示意图; 图 6为本发明又一实施例提供的一种基站的结构示意图; 图 7为本发明又一实施例提供的一种终端的结构示意图。 具体实施方式 下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案 进行清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实 施例, 而不是全部的实施例。 本发明实施例适用于 D2D通信, 尤其适用于在 LTE系统中引入 D 2 D 通信的情景。 本发明实施例以 L TE 为例进行说明。 LTE 系统在引入 D 2 D通信时, 通常可以将某些固定的帧作为发现时段分配给 D 2D通信。 图 1为本发明实施例提供的一种通信方法的流程示意图。 该方法由 基站执行。 参考图 1 , 该方法可以包括以下步骤:
1 01、 基站生成当前发现时段的当前发现帧标识。
D 2 D通信中, 在各个发现时段中, 每个参与 D 2 D通信的终端都 可以在某个频时单元发送发现信号, 以便其他终端检测。 为了使每 个终端都有机会被其它终端发现,需要对每个发现时段的图样进行 频时跳转, 即每个终端在每个发现时段内的频-时位置不同。 当前发现帧标识用于标识发现时段的频时图样, 终端根据该发现时 段的频时图样发送或者接收发现信号。
102、 基站广播当前发现时段的当前发现帧标识, 以使收到基站发 送的广播的终端根据广播中的当前发现时段的当前发现帧标识获取当 前发现时段的频时图样, 或者获取当前发现时段之后的发现时段的频时 图样。 其中, 基站以广播的形式发送当前发现时段的当前发现帧标识, 接 收到该广播的终端根据该广播中的当前发现时段的当前发现帧标识, 获 得当前发现时段的频时图样。 根据具体情况, 还可以根据当前发现时段 的频时图样获取当前发现时段之后的发现时段的频时图样, 例如当前发 现时段的下一个发现时段的频时图样。 本实施例, 通过基站广播当前发现时段的当前发现帧标识, 以使 终端根据当前发现时段的当前发现帧标识获取当前发现时段的频时图 样,解决了现有技术中当两个相邻的发现时段间隔较长时终端无法 获得发现时段的频时图样的问题。 在上述方案基础上, 步骤 1 01 中, 基站获得当前发现时段的当前发 现帧标识, 可以优选包括: 基站根据当前发现时段的序号和发现帧的循环周期计算当前发现 时段的当前发现帧标识。 具体地, 基站根据当前发现时段的序号和发现帧的循环周期计算当 前发现时段的当前发现帧标识, 可以包括以下: 基站根据公式 i ndex=t mod N ( 1 ) 计算当前发现时段的当前发现帧标识。
其中, i ndex 为当前发现时段的当前发现帧标识, t 为当前发现时 段的序号, N为发现帧的循环周期。 mod为求余运算。 公式 ( 1 ) 表示: 当前发现时段的序号除以发现帧的循环周期的余数即为当前发现时段 的当前发现帧标识。
频时跳转方案通常为根据频时位置的初始值, 即 i (0), j (0)的 值, 并根据当前发现时段序号 t 的值, 推算到当前发现时段 t 的 i (t), j (t)的值, 获得当前发现时段的频时位置。 例如,参考图 2所示的发现时段序号 t为 0, 1, 2 时对应的发现 时段的频时图样, 其中每个频时图样为序号为 0至 8 的 9个终端在 发现时段序号为 t 的频时位置。 图 2中横坐标对应时间单元 j,纵坐标 对应频域单元 i。
图 2所示的频时跳转方案可以由以下获得: I={0,l,...,m-1}, J={0,l,...,n-1}, m<=n, i(t)=i(0)+c*t mod m ( 2 ) j(t)=j(0)+i(0)*t modn (3) 其中 c是一个常数。 例如, m=n=3时, 令 c=l, 序号为 0的终端, 发送发现信号的频时 位置的初始值 i(0)=0,j(0)=0,在图 2中发现时段序号 t=0对应的发现时 段的当前发现帧标识中, 频时位置为(0,0)。 根据公式(2)和公式( 3 ) 可得 i(l)=l,j(l)=0,在图 2中发现时段序号 t=l对应的发现时段的频时 图样中, 频时位置为 ( 1,0) 。 序号为 1的终端, 发送发现信号的频时位 置的初始值 i(0)=0,j(0)=l,在图 2中发现时段序号 t=0对应的发现时段 的频时图样中, 频时位置为 (0,1 ) 。 根据公式 (2) 和公式 (3) 可得 i(l)=l,j(l)=l,在图 2中发现时段序号 t=l对应的发现时段的频时图样 中, 频时位置为 ( 1,1 ) 。 从公式 (2) 和公式 (3) 可以得知, 对于 t大于 2的发现时段的跳 转图样按照图 1 所示的跳转图样是循环出现的。 图 2 中发现时段的跳转 图样循环周期 N为 3。 因此, 可以根据公式 ( 1 ) 计算当前发现时段的当前发现帧标识。 当前发现时段的当前发现帧标识可以为发现时段序号 t在发现时段 循环周期的相对序号, 即 ( tmodN)。 例如 N=3, t = 0 时, 对应的发现时 段的当前发现帧标识为 0; t = l 时, 对应的发现时段的当前发现帧标识 为 1 ; 对于 t 大于 2 的值, t = 3时, 对应的发现时段的当前发现帧标识 为 0 ; t =4时, 对应的发现时段的当前发现帧标识为 1。
LTE 系统中, 基站可以将当前发现时段的当前发现帧标识进行广播 接收到该广播的终端, 从该广播中获得当前发现时段的当前发现帧标 识。 其中当前发现帧标识由当前发现时段的序号及当前发现帧标识的循 环周期获得, 终端根据该当前发现帧标识, 获得当前发现时段的频时图 样。
更进一步地, 在上述方案基础上, 基站广播当前发现时段的当前发 现帧标识, 可以包括:
基站在当前发现时段到来之前送广播, 其中, 广播包括当前发现时 段的当前发现帧标识。
在 LTE系统为 D2D通信分配的每个发现时段到来之前, 基站发送的 广播包含当前发现时段的当前发现帧标识, 接收到该广播的终端, 从该 广播中获得当前发现时段的当前发现帧标识, 根据该当前发现时段的当 前发现帧标识获得当前发现时段的频时图样。 或者, 基站在当前发现时段内发送广播, 其中, 广播包括当前发现 时段的当前发现帧标识。
基站也可以在 LTE系统为 D2D通信分配的每个发现时段内发送包含 当前发现时段的当前发现帧标识的广播, 接收到该广播的终端, 从该广 播中获得当前发现时段的当前发现帧标识, 根据该当前发现时段的当前 发现帧标识获得当前发现时段的频时图样。 本方案, 基站在当前发现时间段到来之前或当前发现时间内通过广 播发送当前发现时段的当前发现帧标识, 使得收到该广播的终端可以根 据当前发现时段的当前发现帧标识获得当前发现时段的频时图样或者 当前发现时段之后的发现时段的频时图样。
可选地, 基站也可以在 LTE系统为 D2D通信分配的部分发现时段发 送包含当前发现时段的当前发现帧标识的广播。 若当前发现时段为预设 的发现时段, 基站广播当前发现时段的当前发现帧标识, 可以包括: 基站在预设的发现时段到来之前发送广播, 其中, 广播包括当前发 现时段的当前发现帧标识; 或者, 基站在预设的发现时段内发送广播, 其中, 广播包括当前发 现时段的当前发现帧标识。
其中, 预设的发现时段可以包括 LTE系统为 D2D通信分配的发现时 段中的部分发现时段。 具体可以包括以下方案:
方案 1: 发现帧的循环周期为 N, N包括被 2整除的整数。 系统可以在第 2k 个发现时段内或到来前广播 ( 2k mod N) 的值作 为当前发现时段的当前发现帧标识, 其中 k=0,l,2... 终端根据该当前发现时段的当前发现帧标识获得当前发现时段的 频时图样。
方案 2: 发现帧的循环周期为 N, N包括被 2整除的整数。 系统可以在第 2k个 Discovery时段内或到来前广播 ( k mod N/2 ) 的值作为当前发现时段的当前发现帧标识, 其中 k=0,l,2...
终端根据该当前发现时段的当前发现帧标识获得(2k mod N) , 等同 获得当前发现时段序号, 从而获得当前发现时段的频时图样。
方案 3: 发现帧的循环周期为 N, N包括被 2整除的整数。 系统可以在第 2k+l个 Discovery时段内或到来前广播( 2k+l mod N ) 的值作为当前发现时段的当前发现帧标识, 其中 k=0,l,2... 终端根据该当前发现时段的当前发现帧标识获得当前发现时段的 频时图样。
方案 4: 发现帧的循环周期为 N, N包括被 2整除的整数。 系统可以在第 2k+l个 Discovery时段内或到来前广播 ( k mod N/2 ) 的值作为当前发现时段的当前发现帧标识, 其中 k=0,l,2...
终端根据该当前发现时段的当前发现帧标识获得(2k+l mod N) , 等 同获得当前发现时段序号, 从而获得当前发现时段的频时图样。
方案 5: 发现帧的循环周期为 Ν, Ν包括被 3整除的整数。 系统可以在第 3k个 Discovery时段内或到来前广播 ( 3k mod N ) 的值作为当前发现时段的当前发现帧标识, 其中 k=0,l,2... 终端根据该当前发现时段的当前发现帧标识获得当前发现时段的 频时图样。 方案 6: 发现帧的循环周期为 N, N包括被 3整除的整数。 系统可以在第 3k个 Discovery时段内或到来前广播 ( k mod N/3 ) 的值作为当前发现时段的当前发现帧标识, 其中 k=0,l,2...
终端根据该当前发现时段的当前发现帧标识获得(3k mod N) , 等同 获得当前发现时段序号, 从而获得当前发现时段的频时图样。
方案 7: 发现帧的循环周期为 N, N包括被 3整除的整数。 系统可以在第 3k+l个 Discovery时段内或到来前广播( 3k+l mod N ) 的值作为当前发现时段的当前发现帧标识, 其中 k=0,l,2... 终端根据该当前发现时段的当前发现帧标识获得当前发现时段的 频时图样。
方案 8: 发现帧的循环周期为 N, N包括被 3整除的整数。 系统可以在第 3k+l个 Discovery时段内或到来前广播( k mod N/3 ) 的值作为当前发现时段的当前发现帧标识, 其中 k=0,l,2...
终端根据该当前发现时段的当前发现帧标识获得(3k+l mod N) , 等 同获得当前发现时段序号, 从而获得当前发现时段的频时图样。
方案 9: 发现帧的循环周期为 Ν, Ν包括被 3整除的整数。 系统可以在第 3k+2个 Discovery时段内或到来前广播( 3k+2 mod Ν ) 的值作为当前发现时段的当前发现帧标识, 其中 k=0,l,2... 终端根据该当前发现时段的当前发现帧标识获得当前发现时段的 频时图样。 方案 10: 发现帧的循环周期为 N, N包括被 3整除的整数。 系统可以在第 3k+2个 Discovery时段内或到来前广播( k mod N/3 ) 的值作为当前发现时段的当前发现帧标识, 其中 k=0,l,2...
终端根据该当前发现时段的当前发现帧标识获得(3k+2 mod N) , 等 同获得当前发现时段序号, 从而获得当前发现时段的频时图样。 本方案, 基站在预设的发现时段到来之前或内通过广播发送当前发 现时段的当前发现帧标识, 以便于收到广播的终端根据广播中的当前发 现时段的当前发现帧标识获得当前发现时段的频时图样。 显然, 预设的 发现时段不仅包括上述 1 0种方案, 本发明实施例不再——例举。 图 3为本发明又一实施例提供的一种通信方法的流程示意图。 本实施例由终端执行。 参考图 3 , 该方法可以包括以下步骤:
301、 终端接收基站发送的广播, 从广播中获取当前发现时段的当 前发现帧标识。 其中, 当前发现帧标识用于标识发现时段的频时图样, 终端根据该 发现时段的频时图样发送或者接收发现信号。 发现时段的发现帧标识由 当前发现时段的序号及发现帧的循环周期获得。 具体地, 可参考公式 ( 1 )。
可选的, 步骤 301 中, 终端接收基站发送的广播, 从广播中获取当 前发现时段的当前发现帧标识, 可以包括: 终端在当前发现时段到来之前通过广播接收当前发现时段的当前 发现帧标识。
在 LTE系统为 D2D通信分配的每个发现时段到来之前, 基站发送的 广播包含当前发现时段的当前发现帧标识, 接收到该广播的终端, 从该 广播中获得当前发现时段的当前发现帧标识。 或者, 终端在当前发现时段内通过广播接收当前发现时段的当前发 现帧标识。
基站也可以在 LTE系统为 D2D通信分配的每个发现时段内发送包含 当前发现时段的当前发现帧标识的广播, 接收到该广播的终端, 从该广 播中获得当前发现时段的当前发现帧标识。 本方案, 终端在当前发现时间段到来之前或当前发现时间内通过广 播接收当前发现时段的当前发现帧标识, 可以根据当前发现帧标识获得 当前发现时段的频时图样。
进一步可选地, 步骤 301 中, 基站也可以在 LTE系统为 D2D通信分 配的部分发现时段发送包含当前发现时段的当前发现帧标识的广播。 具体地, 若当前发现时段为预设的发现时段, 则步骤 301终端接收 基站发送的广播, 从广播中获取当前发现时段的当前发现帧标识, 可以 包括:
终端在预设的发现时段到来之前通过广播接收当前发现时段的当 前发现帧标识。 或者, 终端在预设的发现时段内通过广播接收当前发现时段的当前 发现帧标识。
其中, 预设的发现时段可以包括 LTE系统为 D2D通信分配的发现时 段中的部分发现时段。 具体可以参考上述方案 1至 1 0。 可选的, 若当前发现时段为预设的发现时段之后的发现时段, 则步 骤 301 中终端接收基站发送的广播, 从广播中获取当前发现时段的当前 发现帧标识, 可以包括: 终端根据预设的发现时段的当前发现帧标识及系统时钟计算当前 发现时段的当前发现帧标识。 其中, 终端接收到预设的发现时段的当前发现帧标识, 根据该预设 的发现时段的当前发现帧标识和系统时钟可以计算该预设的发现时段 之后的发现时段的当前发现帧标识 (即当前发现时段的当前发现帧标 识 )。 本方案, 终端通过在预设的发现时段到来之前或内通过广播接收当 前发现时段的当前发现帧标识, 可以根据广播中的当前发现时段的当前 发现帧标识获得当前发现时段的频时图样。
302、 终端根据当前发现时段的当前发现帧标识获取当前发现时段 的频时图样, 或者获取当前发现时段之后的发现时段的频时图样。 其中, 终端根据频时位置的初始值、 当前发现时段的当前发现帧标 识及跳转函数, 获取当前发现时段的频时图样, 或者获取当前发现时段 之后的发现时段的频时图样。 跳转函数为从当前发现时段的频时位置递推到下一个发现时段的 频时位置的函数, 即为发现信号在相邻的发现时段中的频时位置关系。 例如公式 ( 2 ) 和 ( 3) 所示跳转函数。 具体地, 终端预先获得自身的频时位置的初始值, 即, 发现时段序 号 t = 0时的频时位置的初始值, 根据当前发现时段的当前发现帧标识, 参考公式 ( 2 ) 和 ( 3) 可以得到终端在当前发现时段的频时图样, 在该 频时图样中的频时位置发送发现信号以便于其他终端发现。 终端还可以根据根据当前发现时段的当前发现帧标识, 参考公式 ( 2 ) 和 ( 3 ) 可以得到其他终端在当前发现时段的频时位置。 具体地, 该终端根据当前发现时段的当前发现帧标识可以获得当前发现时段之 前的发现时段的发现帧标识, 根据该发现帧标识和当前发现时段之前的 发现时段检测到的其他终端的频时位置, 参考公式 ( 2 ) 和 ( 3 ) 可以计 算出其他终端的频时位置初始值, 根据该初始值和当前发现时段的当前 发现帧标识可以获得当前发现时段的其他终端的频时图样, 在该频时图 样中的其他终端的频时位置上接收其他终端的发现信号。 也可以将当前 发现时段和当前发现时段之前的发现时段联合检测其他终端的发现信 号, 如果检测成功, 则可以和其他终端进行端到端通信。 依次类推, 终端根据当前发现时段的频时图样, 进一步可以获得当 前发现时段之后的发现时段的频时图样, 还可以获得整个循环周期的发 现时段的频时图样。 如果终端在当前发现时段虽然检测到了其他终端的发现信号, 但是 由于干扰或信道质量差等原因, 造成发现信号接收的效果很差, 该终端 可以在当前发现时段之后的发现时段上, 例如下个发现时段上, 在获得 的其他终端的频时位置再次检测其他终端的发现信号, 也可以联合检 测, 如果检测成功则可以和其他终端进行端到端通信。 如果终端在当前发现时段没有检测到其他终端的发现信号, 该终端 可以根据根据当前发现时段的当前发现帧标识, 参考公式 ( 2 ) 和 ( 3 ) 获得终端在当前发现时段的频时图样, 在该频时图样对应的频时位置, 发送发现信号以便于其他终端发现自己。 还可以再根据当前发现时段的 频时图样, 参考公式 ( 2 ) 和 ( 3 )得到该终端在当前发现时段之后的发 现时段的频时图样, 在该频时图样对应的频时位置发送发现信号以便于 其他终端发现自己。 可选地, 若当前发现时段为预设的发现时段之后的发现时段, 终端 根据广播接收到的预设的发现时段的当前发现帧标识及系统时钟计算 当前发现时段的当前发现帧标识, 根据获得该当前发现时段的当前发现 帧标识, 获得当前发现时段的频时图样。 本实施例, 终端通过从基站发送的广播中获取当前发现时段的当 前发现帧标识, 根据当前发现帧标识获得当前发现时段或当前发现时段 之后的发现时段的频时图样,解决了现有技术中由于当两个相邻的发 现时段间隔较长时终端无法获得发现时段的频时图样的问题。 图 4为本发明实施例提供的一种基站的结构示意图。该基站用 于执行上述实施例的通信方法, 该基站包括: 标识生成单元 4 1 和 广播单元 4 2。 其中,标识生成单元 4 1 ,用于生成当前发现时段的当前发现帧标识。 当前发现帧标识用于标识发现时段的频时图样, 终端根据该发现时 段的频时图样发送或者接收发现信号。 广播单元 4 2 ,用于广播标识生成单元生成的当前发现时段的当前发 现帧标识, 以使收到基站发送的广播的终端根据广播中的当前发现时段 的当前发现帧标识获取当前发现时段的频时图样, 或者获取当前发现时 段之后的发现时段的频时图样。 基站以广播的形式发送当前发现时段的当前发现帧标识, 接收到该 广播的终端根据该广播中的当前发现时段的当前发现帧标识, 获得当前 发现时段的频时图样。 根据具体情况, 还可以根据当前发现时段的频时 图样获取当前发现时段之后的发现时段的频时图样, 例如当前发现时段 的下一个发现时段的频时图样。 本实施例, 通过基站广播当前发现时段的当前发现帧标识, 以使 终端根据当前发现时段的当前发现帧标识获取当前发现时段的频时图 样,解决了现有技术中两个相邻的发现时段间隔较长时终端无法获 得发现时段的频时图样的问题。
在上述方案基础上, 标识生成单元 4 1 , 具体用于: 根据当前发现时段的序号和发现帧的循环周期计算当前发现时段 的当前发现帧标识。
具体地, 根据公式 i ndex=t mod N计算当前发现时段的当前发现帧 标识;
其中, i ndex 为当前发现时段的当前发现帧标识, t 为当前发现时 段的序号, N为发现帧的循环周期, mod为求余运算。
LTE 系统中, 基站可以将当前发现时段的当前发现帧标识进行广播 接收到该广播的终端, 从该广播中获得当前发现时段的当前发现帧标 识。 其中当前发现帧标识由当前发现时段的序号及当前发现帧标识的循 环周期获得, 终端根据该当前发现帧标识, 获得当前发现时段的频时图 样。
更进一步地, 在上述方案基础上, 广播单元 42 , 具体用于: 在当前发现时段到来之前送广播, 其中, 广播包括标识生成单元生 成的当前发现时段的当前发现帧标识; 或者,
在当前发现时段内发送广播, 其中, 广播包括标识生成单元生成的 当前发现时段的当前发现帧标识。
在 LTE系统为 D2D通信分配的每个发现时段到来之前, 基站发送的 广播包含当前发现时段的当前发现帧标识, 接收到该广播的终端, 从该 广播中获得当前发现时段的当前发现帧标识, 根据该当前发现时段的当 前发现帧标识获得当前发现时段的频时图样。
或者, 基站在当前发现时段内发送广播, 其中, 广播包括当前发现 时段的当前发现帧标识。
基站也可以在 LTE系统为 D2D通信分配的每个发现时段内发送包含 当前发现时段的当前发现帧标识的广播, 接收到该广播的终端, 从该广 播中获得当前发现时段的当前发现帧标识, 根据该当前发现时段的当前 发现帧标识获得当前发现时段的频时图样。 本方案, 基站在当前发现时间段到来之前或当前发现时间内通过广 播发送当前发现时段的当前发现帧标识, 使得收到该广播的终端可以根 据当前发现时段的当前发现帧标识获得当前发现时段的频时图样或者 当前发现时段之后的发现时段的频时图样。
可选地, 基站也可以在 LTE系统为 D2 D通信分配的部分发现时段发 送包含当前发现时段的当前发现帧标识的广播。广播单元 42 ,具体用于: 在预设的发现时段到来之前发送广播, 其中, 广播包括标识生成单 元生成的当前发现时段的当前发现帧标识; 或者,
在预设的发现时段内发送广播, 其中, 广播包括标识生成单元生成 的当前发现时段的当前发现帧标识。
其中, 预设的发现时段可以包括 LTE系统为 D 2 D通信分配的发现时 段中的部分发现时段。 具体参考上述实施例的方案 1至 1 0。 本方案, 基站在预设的发现时段到来之前或内通过广播发送当前发 现时段的当前发现帧标识, 以便于收到广播的终端根据广播中的当前发 现时段的当前发现帧标识获得当前发现时段的频时图样。 图 5为本发明实施例提供的一种终端的结构示意图。 该终端用 于执行上述实施例的通信方法, 该终端包括: 接收单元 5 1 和获取单元 5 2。 接收单元 5 1 , 用于接收基站发送的广播, 从广播中获取当前发现时 段的当前发现帧标识。 当前发现帧标识用于标识发现时段的频时图样, 终端根据该发现时 段的频时图样发送或者接收发现信号。 接收单元获取的发现时段的发现 帧标识由当前发现时段的序号及发现帧的循环周期获得。 具体地, 可参 考公式 ( 1 )。
获取单元 5 2 ,用于根据接收单元获取的当前发现时段的当前发现帧 标识获取当前发现时段的频时图样, 或者获取当前发现时段之后的发现 时段的频时图样。 本实施例, 终端通过从基站发送的广播中获取当前发现时段的当 前发现帧标识, 根据当前发现帧标识获得当前发现时段或当前发现时段 之后的发现时段的频时图样,解决了现有技术中由于当两个相邻的发 现时段间隔较长时终端无法获得发现时段的频时图样的问题。 在上述方案基础上, 可选地, 接收单元 5 1 , 具体用于: 在当前发现时段到来之前通过广播接收当前发现时段的当前发现 帧标识。
在 LTE系统为 D2D通信分配的每个发现时段到来之前, 基站发送的 广播包含当前发现时段的当前发现帧标识, 接收到该广播的终端, 从该 广播中获得当前发现时段的当前发现帧标识。 或者, 在当前发现时段内通过广播接收当前发现时段的当前发现帧 标识。 基站也可以在 LTE系统为 D2D通信分配的每个发现时段内发送包 含当前发现时段的当前发现帧标识的广播, 接收到该广播的终端, 从该 广播中获得当前发现时段的当前发现帧标识。 本方案, 终端在当前发现时间段到来之前或当前发现时间内通过广 播接收当前发现时段的当前发现帧标识, 可以根据当前发现帧标识获得 当前发现时段的频时图样。 进一步可选地, 若当前发现时段为预设的发现时段, 接收单元 5 1 具体用于: 在预设的发现时段到来之前通过广播接收当前发现时段的当前发 现帧标识; 或者, 在预设的发现时段内通过广播接收当前发现时段的当前发现帧标 识。
其中, 预设的发现时段可以包括 LTE系统为 D2D通信分配的发现时 段中的部分发现时段。 具体可以参考上述方案 1至 1 0。 若当前发现时段为预设的发现时段之后的发现时段, 接收单元 5 1 具体用于: 根据预设的发现时段的当前发现帧标识及系统时钟计算当前发现 时段的当前发现帧标识。 其中, 终端接收到预设的发现时段的当前发现帧标识, 根据该预设 的发现时段的当前发现帧标识和系统时钟可以计算该预设的发现时段 之后的发现时段的当前发现帧标识 (即当前发现时段的当前发现帧标 识 )。 本方案, 终端通过在预设的发现时段到来之前或内通过广播接收当 前发现时段的当前发现帧标识, 可以根据广播中的当前发现时段的当前 发现帧标识获得当前发现时段的频时图样。
图 6为本发明又一实施例提供的一种基站的结构示意图, 该基站用 于实现上述实施例提供的通信方法。 参考图 6 , 包括: 至少一个处理器 61、 存储器 62、 总线 63及发射机 64 , 总线 63用于实现处理器 61、 存储 器 62之间的连接及通信, 存储器 62用于存储处理器 61执行的程序代码 及数据, 该总线 63可以是工业标准体系结构( Industry Standard Architecture , 简称为 ISA ) 总线、 外部设备互连 ( Peripheral Component , 简称为 PCI ) 总线或扩展工业标准体系结构 ( Extended Industry Standard Architecture , 简称为 EISA ) 总线等, 此处并不限定。 该总线 63 可以分为地址总线、 数据总线、 控制总线等。 为便于表示, 图 6 中仅用一条粗线表示, 但并 不表示仅有一根总线或一种类型的总线。 其中: 存储器 62用于存储数据或可执行程序代码,其中程序代码包括计算 机操作指令, 具体可以为: 操作系统、 应用程序等。 存储器 62可能包含 高速 RAM存储器,也可能还包括非易失性存储器( non- volatile memory ) , 例如至少一个磁盘存储器。 处理器 61可能是一个中央处理器 ( Central Processing Unit , 简称为 CPU ) , 或者是特定集成电路( Application Specific Integrated Circuit , 简 称为 ASIC ) ,或者是被配置成实施本发明实施例的一个或多个集成电路。 处理器 61用于通过执行存储器 62中的程序代码实现上述实施例中 的通信方法。 其中, 处理器 6 1用于生成当前发现时段的当前发现帧标识。
发射机 64用于广播处理器 6 1生成的当前发现时段的当前发现帧标 识, 以使收到基站发送的广播的终端根据广播中的当前发现时段的当前 发现帧标识获取当前发现时段的频时图样, 或者获取当前发现时段之后 的发现时段的频时图样。 当前发现帧标识用于标识发现时段的频时图样, 终端根据该发现时 段的频时图样发送或者接收发现信号。 基站以广播的形式发送当前发现时段的当前发现帧标识, 接收到该 广播的终端根据该广播中的当前发现时段的当前发现帧标识, 获得当前 发现时段的频时图样。 根据具体情况, 还可以根据当前发现时段的频时 图样获取当前发现时段之后的发现时段的频时图样, 例如当前发现时段 的下一个发现时段的频时图样。 本实施例, 通过基站广播当前发现时段的当前发现帧标识, 以使 终端根据当前发现时段的当前发现帧标识获取当前发现时段的频时图 样,解决了现有技术中两个相邻的发现时段间隔较长时终端无法获 得发现时段的频时图样的问题。
在上述方案基础上, 处理器 61具体用于: 根据当前发现时段的序号和发现帧的循环周期计算当前发现时段 的当前发现帧标识。
具体地, 根据公式 i ndex=t mod N计算当前发现时段的当前发现帧 标识;
其中, i ndex 为当前发现时段的当前发现帧标识, t 为当前发现时 段的序号, N为发现帧的循环周期, mod为求余运算。
LTE 系统中, 基站可以将当前发现时段的当前发现帧标识进行广播 接收到该广播的终端, 从该广播中获得当前发现时段的当前发现帧标 识。 其中当前发现帧标识由当前发现时段的序号及当前发现帧标识的循 环周期获得, 终端根据该当前发现帧标识, 获得当前发现时段的频时图 样。
更进一步地, 在上述方案基础上, 发射机 64具体用于: 在当前发现时段到来之前送广播, 其中, 广播包括处理器生成的当 前发现时段的当前发现帧标识。 或者, 在当前发现时段内发送广播, 其中, 广播包括处理器生成的 当前发现时段的当前发现帧标识。 本方案, 基站在当前发现时间段到来之前或当前发现时间内通过广 播发送当前发现时段的当前发现帧标识, 使得收到该广播的终端可以根 据当前发现时段的当前发现帧标识获得当前发现时段的频时图样或者 当前发现时段之后的发现时段的频时图样。
可选地, 基站也可以在 LTE系统为 D2 D通信分配的部分发现时段发 送包含当前发现时段的当前发现帧标识的广播。 发射机 64具体用于: 在预设的发现时段到来之前发送广播, 其中, 广播包括处理器生成 的当前发现时段的当前发现帧标识; 或者, 在预设的发现时段内发送广播, 其中, 广播包括处理器生成的当前 发现时段的当前发现帧标识。
其中, 预设的发现时段可以包括 LTE系统为 D 2 D通信分配的发现时 段中的部分发现时段。 具体参考上述实施例的方案 1至 1 0。 本方案, 基站在预设的发现时段到来之前或内通过广播发送当前发 现时段的当前发现帧标识, 以便于收到广播的终端根据广播中的当前发 现时段的当前发现帧标识获得当前发现时段的频时图样。 图 7为本发明又一实施例提供的一种终端的结构示意图。该终 端用于执行上述实施例的通信方法。 该终端包括: 至少一个处理器 71、 存储器 72、 总线 73及接收机 74 , 总线 73用于实现处理器 71、 存储 器 72之间的连接及通信, 存储器 72用于存储处理器 71执行的程序代码 及数据, 该总线 73可以是工业标准体系结构( Industry Standard Architecture , 简称为 ISA ) 总线、 外部设备互连 ( Peripheral Component, 简称为 PCI ) 总线或扩展工业标准体系结构 ( Extended Industry Standard Architecture , 简称为 EISA ) 总线等, 此处并不限定。 该总线 73 可以分为地址总线、 数据总线、 控制总线等。 为便于表示, 图 7 中仅用一条粗线表示, 但并 不表示仅有一根总线或一种类型的总线。 其中: 存储器 72用于存储数据或可执行程序代码,其中程序代码包括计算 机操作指令, 具体可以为: 操作系统、 应用程序等。 存储器 72可能包含 高速 RAM存储器,也可能还包括非易失性存储器( non- volatile memory ) , 例如至少一个磁盘存储器。 处理器 71可能是一个中央处理器 ( Central Processing Unit, 简称为 CPU ) , 或者是特定集成电路( Application Specific Integrated Circuit, 简 称为 ASIC ) ,或者是被配置成实施本发明实施例的一个或多个集成电路。
处理器 71用于通过执行存储器 72中的程序代码实现上述实施例中 的通信方法。
其中, 接收机 74接收基站发送的广播, 处理器 7 1用于从广播中获 取当前发现时段的当前发现帧标识。 当前发现帧标识用于标识发现时段的频时图样, 终端根据该发现时 段的频时图样发送或者接收发现信号。 接收单元获取的发现时段的发现 帧标识由当前发现时段的序号及发现帧的循环周期获得。 具体地, 可参 考公式 ( 1 )。
处理器 7 1 用于根据当前发现时段的当前发现帧标识获取当前发现 时段的频时图样, 或者获取当前发现时段之后的发现时段的频时图样。 本实施例, 终端通过从基站发送的广播中获取当前发现时段的当 前发现帧标识, 根据当前发现帧标识获得当前发现时段或当前发现时段 之后的发现时段的频时图样,解决了现有技术中由于当两个相邻的发 现时段间隔较长时终端无法获得发现时段的频时图样的问题。 在上述方案基础上, 可选地, 接收机 74具体用于: 在当前发现时段到来之前通过广播接收当前发现时段的当前发现 帧标识; 或者,
在当前发现时段内通过广播接收当前发现时段的当前发现帧标识。 本方案, 终端在当前发现时间段到来之前或当前发现时间内通过广 播接收当前发现时段的当前发现帧标识, 可以根据当前发现帧标识获得 当前发现时段的频时图样。
进一步可选地, 若当前发现时段为预设的发现时段, 接收机 74 具 体用于: 终端在预设的发现时段到来之前通过广播接收当前发现时段的当 前发现帧标识。 或者, 终端在预设的发现时段内通过广播接收当前发现时段的当前 发现帧标识。
其中, 预设的发现时段可以包括 LTE系统为 D 2 D通信分配的发现时 段中的部分发现时段。 具体可以参考上述方案 1至 1 0。 若当前发现时段为预设的发现时段之后的发现时段, 则接收机 74 具体用于: 终端根据预设的发现时段的当前发现帧标识及系统时钟计算当前 发现时段的当前发现帧标识。 其中, 终端接收到预设的发现时段的当前发现帧标识, 根据该预设 的发现时段的当前发现帧标识和系统时钟可以计算该预设的发现时段 之后的发现时段的当前发现帧标识 (即当前发现时段的当前发现帧标 识 )。 本方案, 终端通过在预设的发现时段到来之前或内通过广播接收当 前发现时段的当前发现帧标识, 可以根据广播中的当前发现时段的当前 发现帧标识获得当前发现时段的频时图样。 通过以上的实施方式的描述, 所属领域的技术人员可以清楚地了解 到本发明可以用硬件实现, 或固件实现, 或它们的组合方式来实现。 当 使用软件实现时, 可以将上述功能存储在计算机可读介质中或作为计算 机可读介质上的一个或多个指令或代码进行传输。 计算机可读介质包括 计算机存储介质和通信介质, 其中通信介质包括便于从一个地方向另一 个地方传送计算机程序的任何介质。 存储介质可以是计算机能够存取的 任何可用介质。 以此为例但不限于: 计算机可读介质可以包括 RAM、 ROM , EEPR0M、 CD-ROM或其他光盘存储、 磁盘存储介质或者其他磁存储设备、 或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并 能够由计算机存取的任何其他介质。 此外。 任何连接可以适当的成为计 算机可读介质。 例如, 如果软件是使用同轴电缆、 光纤光缆、 双绞线、 数字用户线 (DSL ) 或者诸如红外线、 无线电和微波之类的无线技术从网 站、 服务器或者其他远程源传输的, 那么同轴电缆、 光纤光缆、 双绞线、 DSL或者诸如红外线、无线和微波之类的无线技术包括在所属介质的定影 中。 如本发明所使用的, 盘 (Disk) 和碟 (disc) 包括压缩光碟 (CD) 、 激光碟、 光碟、 数字通用光碟(DVD) 、 软盘和蓝光光碟, 其中盘通常磁 性的复制数据, 而碟则用激光来光学的复制数据。 上面的组合也应当包 括在计算机可读介质的保护范围之内。 总之, 以上所述仅为本发明技术方案的较佳实施例而已, 并非用于 限定本发明的保护范围。 凡在本发明的精神和原则之内, 所作的任何修 改、 等同替换、 改进等, 均应包含在本发明的保护范围之内。

Claims

权 利 要 求 书
1、 一种通信方法, 其特征在于, 包括: 基站生成当前发现时段的当前发现帧标识; 基站广播所述当前发现时段的当前发现帧标识, 以使收到所述基站 发送的所述广播的终端根据所述广播中的所述当前发现时段的当前发现 帧标识获取当前发现时段的频时图样, 或者获取所述当前发现时段之后 的发现时段的频时图样。
2、 根据权利要求 1所述的方法, 其特征在于, 所述基站获得当前发 现时段的当前发现帧标识, 包括: 所述基站根据当前发现时段的序号和发现帧的循环周期计算当前发 现时段的当前发现帧标识。
3、 根据权利要求 2所述的方法, 其特征在于, 所述基站根据当前发 现时段的序号和发现帧的循环周期计算当前发现时段的当前发现帧标 识, 包括: 所述基站根据公式 index=t mod N 计算当前发现时段的当前发现帧 标识;
其中, index为所述当前发现时段的当前发现帧标识, t为所述当前 发现时段的序号, N为发现帧的循环周期, mod为求余运算。
4、 根据权利要求 1所述的方法, 其特征在于, 所述基站广播所述当 前发现时段的当前发现帧标识, 包括: 所述基站在所述当前发现时段到来之前送广播, 其中, 所述广播包 括所述当前发现时段的当前发现帧标识; 或者, 所述基站在所述当前发现时段内发送广播, 其中, 所述广播包括所 述当前发现时段的当前发现帧标识。
5、 根据权利要求 1所述的方法, 其特征在于, 所述基站广播所述当 前发现时段的当前发现帧标识, 包括: 所述基站在所述预设的发现时段到来之前发送广播, 其中, 所述广 播包括所述当前发现时段的当前发现帧标识; 或者,
所述基站在所述预设的发现时段内发送广播, 其中, 所述广播包括 所述当前发现时段的当前发现帧标识。
6、 一种通信方法, 其特征在于, 包括: 终端接收基站发送的广播, 从所述广播中获取当前发现时段的当前 发现帧标识;
根据所述当前发现时段的当前发现帧标识获取所述当前发现时段的 频时图样, 或者获取所述当前发现时段之后的发现时段的频时图样。
7、 根据权利要求 6所述的方法, 其特征在于, 所述当前发现时段的 发现帧标识由当前发现时段的序号及发现帧的循环周期获得。
8、 根据权利要求 6所述的方法, 其特征在于, 所述终端接收基站发 送的广播, 从所述广播中获取当前发现时段的当前发现帧标识, 包括: 所述终端在所述当前发现时段到来之前通过广播接收所述当前发现 时段的当前发现帧标识; 或者,
所述终端在所述当前发现时段内通过广播接收所述当前发现时段的 当前发现帧标识。
9、 根据权利要求 6所述的方法, 其特征在于, 若所述当前发现时段为预设的发现时段, 则所述终端接收基站发送 的广播, 从所述广播中获取当前发现时段的当前发现帧标识, 包括: 所述终端在所述预设的发现时段到来之前通过广播接收所述当前发 现时段的当前发现帧标识; 或者,
所述终端在所述预设的发现时段内通过广播接收所述当前发现时段 的当前发现帧标识;
若所述当前发现时段为所述预设的发现时段之后的发现时段, 则终 端接收基站发送的广播, 从所述广播中获取当前发现时段的当前发现帧 标识, 包括: 所述终端根据所述预设的发现时段的当前发现帧标识及系统时钟计 算所述当前发现时段的当前发现帧标识。
10、 一种基站, 其特征在于, 包括: 标识生成单元, 用于生成当前发现时段的当前发现帧标识; 广播单元, 用于广播所述标识生成单元生成的所述当前发现时段的 当前发现帧标识, 以使收到所述基站发送的所述广播的终端根据所述广 播中的所述当前发现时段的当前发现帧标识获取当前发现时段的频时图 样, 或者获取所述当前发现时段之后的发现时段的频时图样。
11、 根据权利要求 10所述的基站, 其特征在于, 所述标识生成单元, 具体用于: 根据当前发现时段的序号和发现帧的循环周期计算当前发现时段的 当前发现帧标识。
12、 根据权利要求 11所述的基站, 其特征在于, 所述标识生成单元, 具体用于:
根据公式 index=t mod N计算当前发现时段的当前发现帧标识; 其中, index为所述当前发现时段的当前发现帧标识, t为所述当前 发现时段的序号, N为发现帧的循环周期, mod为求余运算。
1 3、 根据权利要求 10所述的基站, 其特征在于, 所述广播单元, 具 体用于: 在所述当前发现时段到来之前送广播, 其中, 所述广播包括所述标 识生成单元生成的所述当前发现时段的当前发现帧标识; 或者, 在所述当前发现时段内发送广播, 其中, 所述广播包括所述标识生 成单元生成的所述当前发现时段的当前发现帧标识。
14、 根据权利要求 10所述的基站, 其特征在于, 所述广播单元, 具 体用于: 所述基站在所述预设的发现时段到来之前发送广播, 其中, 所述广 播包括所述标识生成单元生成的所述当前发现时段的当前发现帧标识; 或者, 所述基站在所述预设的发现时段内发送广播, 其中, 所述广播包括 所述标识生成单元生成的所述当前发现时段的当前发现帧标识。
1 5、 一种终端, 其特征在于, 包括: 接收单元, 用于接收基站发送的广播, 从所述广播中获取当前发现 时段的当前发现帧标识; 获取单元, 用于根据所述接收单元获取的所述当前发现时段的当前 发现帧标识获取所述当前发现时段的频时图样, 或者获取所述当前发现 时段之后的发现时段的频时图样。
1 6、 根据权利要求 1 5所述的终端, 其特征在于, 所述接收单元获取 的所述当前发现时段的发现帧标识由当前发现时段的序号及发现帧的循 环周期获得。
1 7、 根据权利要求 1 5所述的终端, 其特征在于, 所述接收单元, 具 体用于: 在所述当前发现时段到来之前通过广播接收所述当前发现时段的当 前发现帧标识; 或者,
在所述当前发现时段内通过广播接收所述当前发现时段的当前发现 帧标识。
1 8、 根据权利要求 1 5所述的终端, 其特征在于, 若所述当前发现时段为预设的发现时段, 则所述接收单元具体用于: 在所述预设的发现时段到来之前通过广播接收所述当前发现时段的 当前发现帧标识; 或者,
在所述预设的发现时段内通过广播接收所述当前发现时段的当前发 现帧标识; 若所述当前发现时段为所述预设的发现时段之后的发现时段, 则所 述接收单元具体用于: 根据所述预设的发现时段的当前发现帧标识及系统时钟计算所述当 前发现时段的当前发现帧标识。
19、 一种基站, 其特征在于, 包括: 至少一个处理器、 存储器、 总 线、 及发射机, 总线用于实现处理器、 存储器之间的连接及通信, 存储 器用于存储处理器执行的程序代码及数据;
其中所述处理器用于生成当前发现时段的当前发现帧标识; 所述发射机用于广播所述处理器生成的所述当前发现时段的当前发 现帧标识, 以使收到所述基站发送的所述广播的终端根据所述广播中的 所述当前发现时段的当前发现帧标识获取当前发现时段的频时图样, 或 者获取所述当前发现时段之后的发现时段的频时图样。
20、 根据权利要求 19所述的基站, 其特征在于, 所述处理器具体用 于:
根据当前发现时段的序号和发现帧的循环周期计算当前发现时段的 当前发现帧标识。
21、 根据权利要求 20所述的基站, 其特征在于, 所述处理器具体用 于:
根据公式 index=t mod N计算当前发现时段的当前发现帧标识; 其中, index为所述当前发现时段的当前发现帧标识, t为所述当前 发现时段的序号, N为发现帧的循环周期, mod为求余运算。
22、 根据权利要求 19所述的基站, 其特征在于, 所述发射机具体用 于:
在所述当前发现时段到来之前送广播, 其中, 所述广播包括所述处 理器生成的所述当前发现时段的当前发现帧标识; 或者,
在所述当前发现时段内发送广播, 其中, 所述广播包括所述处理器 生成的所述当前发现时段的当前发现帧标识。
23、 根据权利要求 19所述的基站, 其特征在于, 所述发射机具体用 于:
在所述预设的发现时段到来之前发送广播, 其中, 所述广播包括所 述处理器生成的所述当前发现时段的当前发现帧标识; 或者,
在所述预设的发现时段内发送广播, 其中, 所述广播包括所述处理 器生成的所述当前发现时段的当前发现帧标识。
24、 一种终端, 其特征在于, 包括: 至少一个处理器、 存储器、 总 线、 及接收机, 总线用于实现处理器、 存储器之间的连接及通信, 存储 器用于存储处理器执行的程序代码及数据; 所述接收机接收基站发送的广播, 所述处理器用于从所述广播中获 取当前发现时段的当前发现帧标识;
所述处理器用于根据所述当前发现时段的当前发现帧标识获取所述 当前发现时段的频时图样, 或者获取所述当前发现时段之后的发现时段 的频时图样。
25、 根据权利要求 24所述的终端, 其特征在于, 所述当前发现时段 的发现帧标识由当前发现时段的序号及发现帧的循环周期获得。
26、 根据权利要求 24所述的终端, 其特征在于, 所述接收机具体用 于:
在所述当前发现时段到来之前通过广播接收所述当前发现时段的当 前发现帧标识; 或者, 在所述当前发现时段内通过广播接收所述当前发现时段的当前发现 帧标识。
27、 根据权利要求 24所述的终端, 其特征在于, 若所述当前发现时段为预设的发现时段, 则所述接收机具体用于: 所述终端在所述预设的发现时段到来之前通过广播接收所述当前发 现时段的当前发现帧标识; 或者,
终^ 播接收所述当前发现时段 的当前发现帧标识;
若所述当前发现时段为所述预设的发现时段之后的发现时段, 则所 述接收机具体用于:
所述终端根据所述预设的发现时段的当前发现帧标识及系统时钟计 算所述当前发现时段的当前发现帧标识。
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