WO2013181808A1 - 一种消息的重传方法及终端、基站 - Google Patents

一种消息的重传方法及终端、基站 Download PDF

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Publication number
WO2013181808A1
WO2013181808A1 PCT/CN2012/076520 CN2012076520W WO2013181808A1 WO 2013181808 A1 WO2013181808 A1 WO 2013181808A1 CN 2012076520 W CN2012076520 W CN 2012076520W WO 2013181808 A1 WO2013181808 A1 WO 2013181808A1
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WO
WIPO (PCT)
Prior art keywords
terminal
message
base station
random access
narrowband
Prior art date
Application number
PCT/CN2012/076520
Other languages
English (en)
French (fr)
Inventor
李龠
朱松
熊新
吕永霞
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 PCT/CN2012/076520 priority Critical patent/WO2013181808A1/zh
Priority to CN201280000960.7A priority patent/CN104170445B/zh
Priority to EP12878231.5A priority patent/EP2849483B1/en
Publication of WO2013181808A1 publication Critical patent/WO2013181808A1/zh
Priority to US14/562,684 priority patent/US9876610B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1861—Physical mapping arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1887—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1896—ARQ related signaling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access

Definitions

  • the present invention relates to a random access procedure, and in particular, to a message retransmission method, a terminal, and a base station. Background technique
  • the technical problem to be solved by the embodiments of the present invention is to provide a method for retransmitting a message, a terminal, and a base station, which can implement message 3 retransmission of a narrowband terminal in a random access procedure.
  • an embodiment of the present invention provides a method for retransmitting a message, including:
  • the terminal When the terminal sends a random access preamble to the base station, the terminal notifies the base station that the terminal is a narrowband terminal; and the terminal receives the first random access response that the base station sends to the terminal according to the random access preamble. And sending a message 3 to the base station according to the first random access response;
  • the terminal After the terminal sends the message 3 to the base station according to the first random access response, the terminal retransmits the message 3 to the base station by means of active retransmission.
  • the embodiment of the present invention further provides a method for retransmitting a message 3, including:
  • the base station analyzes the received random access preamble from the terminal, and learns that the terminal is a narrowband terminal; the base station sends a first random access response to the terminal according to the random access preamble; The terminal sends a message 3 retransmission indication for the narrowband terminal to the terminal according to the message 3 sent by the first random access response, and when detecting that the message 3 has an error. Receiving the message 3 retransmitted by the terminal by means of active retransmission.
  • the embodiment of the present invention further provides a terminal, including:
  • a processing unit configured to notify the base station that the terminal is a narrowband terminal when sending a random access preamble to the base station;
  • a receiving unit configured to receive a first random access response sent by the base station according to a random access preamble sent by the sending unit
  • the processing unit is further configured to send a message 3 to the base station according to the first random access response received by the receiving unit;
  • the receiving unit is further configured to receive a message 3 retransmission indication from the base station for the narrowband terminal, where the processing unit is further configured to: according to the retransmission indication of the message 3 for the narrowband terminal received by the receiving unit, to the The base station retransmits the message 3, or after transmitting the message 3, retransmits the message 3 to the base station by means of active retransmission.
  • an embodiment of the present invention further provides a base station, including:
  • a receiving unit configured to receive a random access preamble from the base station
  • An analyzing unit configured to analyze a random access preamble from the terminal received by the receiving unit, to learn that the terminal is a narrowband terminal
  • a sending unit configured to send, by the receiving unit, the random access preamble, to send, to the terminal, a first random access response
  • the receiving unit is further configured to receive a message 3 sent by the terminal to the base station according to the first random access response;
  • a detecting unit configured to detect a message received by the receiving unit 3;
  • the sending unit is configured to: when the detecting unit detects that the message 3 has an error, send a message 3 retransmission indication to the terminal for the narrowband terminal, or the receiving unit is configured to be used by the detecting unit When it is detected that the message 3 has an error, the message 3 that is retransmitted to the base station by the terminal in the manner of active retransmission is received.
  • the base station When the random access is made to the existing narrowband terminal, since the base station does not know that the terminal is a narrowband terminal, when the base station receives the message 3 uploaded by the terminal, the base station still uses the traditional method (for the broadband terminal). Scheduling the narrowband terminal for message 3 retransmission, thereby causing the narrowband terminal to fail to receive the message 3 retransmission indication for the broadband terminal, and cannot normally retransmit the message 3.
  • the base station when the random access preamble is sent to the base station, the base station is notified that it is a narrowband terminal. Therefore, when the base station subsequently detects that there is an error in the message 3 uploaded by the terminal, the base station may retransmit the message 3 for the narrowband terminal.
  • the mode scheduling terminal performs retransmission of the message 3, or the terminal directly retransmits the message 3 to the base station by means of active retransmission. Since the foregoing base station already knows that it is a narrowband terminal, the base station does not mistake the terminal transmission for confusion; The embodiment of the present invention implements message 3 retransmission of a narrowband terminal, and improves the success rate of the narrowband terminal random access procedure.
  • FIG. 2 is a schematic flow chart of a first embodiment of a method for retransmitting a message according to the present invention
  • FIG. 3 is a schematic flow chart of a second embodiment of a method for retransmitting a message according to the present invention.
  • FIG. 4 is a schematic structural diagram of an embodiment of a terminal of the present invention.
  • FIG. 5 is a schematic structural diagram of an embodiment of a base station according to the present invention. detailed description
  • Procedure 1 The terminal first determines a random access preamble to be transmitted to the base station, and then selects a PRACH (Physical Random Access Channel) resource capable of transmitting such a random access preamble, and then performs transmission.
  • the random access preamble here is called Message 1 (message 1), referred to as Msgl.
  • the terminal After the terminal sends the random access preamble, the terminal attempts to receive a random access response from the base station in a RAR (Random Access Response) receiving window.
  • This The random access response is called Message 2 (message 2), referred to as Msg2.
  • the random access response generally includes: a random access preamble identifier, a UL (Uplmk) grant, a temporary C-RNTI (Cell Radio Network Temporary Identifier), and a time alignment command.
  • Process 3 If the terminal receives the random access response that is valid for the terminal, the information in the received random access response is processed separately, that is, the terminal applies the time alignment command, and stores the temporary C-RNTI; For transmitting data stored in the buffer of the terminal or newly generated data to the base station, here, the data transmitted by using the UL grant is generally referred to as Message 3 (message 3), referred to as Msg3 for short.
  • Process 4 After the terminal uses the UL grant included in the random access response to send data, the terminal attempts to receive a PDCCH (Physical Downlink Control Channel) to receive a specific message; here, if the terminal receives normally before timeout To the PDCCH, it is considered that the random access procedure is performed in a normal manner, and the random access procedure is ended.
  • the message received in process four is often referred to as Message4 (message 4), or Msg4 for short.
  • the base station after the base station receives the message 3 sent by the terminal, if the base station performs error detection on the message 3 and finds that there is an error in the message 3, the base station generally adopts a PDCCH or a PHICH (Physical Hybrid ARQ Indicator Channel, physical hybrid).
  • the retransmission indication channel schedules the terminal to resend the message 3.
  • the base station still sends an acknowledgment (ACK) indication to the terminal through the PHICH.
  • the base station Since the base station does not know whether the terminal is a narrowband terminal or a broadband terminal in the random access process, the base station uses the PDCCH or PHICH scheduling terminal to perform retransmission of the message 3, and the narrowband terminal cannot receive the PDCCH or the PHICH.
  • the terminal or narrowband terminal in the following refers to various types of user equipment, such as a mobile communication terminal, a UE (User Equipment), an ME (Mobile Equipment), and others supporting various types of wireless communication technologies.
  • the base stations in the following include, but are not limited to, a Node B, an eNB (evolved Node B, an evolved base station), and an access point.
  • the embodiments of the present invention relate to a process for a narrowband terminal to randomly access a base station, and more particularly to a retransmission mechanism of a message 3 suitable for a narrowband terminal in an access procedure.
  • FIG. 2 is a schematic flowchart of a first embodiment of a method for retransmitting a message according to the present invention.
  • the method flow of Figure 2 illustrates the retransmission process of message 3 from the terminal side, which includes:
  • Step S21 When the terminal sends a random access preamble to the base station, the terminal notifies the base station that it is a narrowband terminal.
  • the terminal sends a random access preamble to the base station, the terminal notifies the base station that it is a narrowband terminal.
  • the terminal transmits a random access preamble to the base station using a time-frequency resource indicating a narrowband characteristic.
  • the time-frequency resource of the special bead is introduced for the narrowband terminal.
  • the terminal uses the special time-frequency resource to transmit the random access preamble, the terminal is regarded as having a narrowband characteristic, that is, a narrowband terminal.
  • the time-frequency resource here can be a PRACH resource.
  • the terminal transmits a random access preamble indicating a narrowband characteristic to the base station.
  • the random access preambles are grouped in advance, and one set of preamble groups is defined as a special bead preamble group indicating narrowband characteristics, and the terminal uses any random access preamble in the special bead preamble group, and When sent to the base station, it is considered that the terminal has a narrowband characteristic, that is, a narrowband terminal.
  • the terminal first selects a random access preamble to be transmitted to the base station from a special preamble group indicating a narrowband characteristic, and then uses a special time-frequency resource capable of indicating a narrowband characteristic. Send the selected random access preamble.
  • the random access preamble in the special time-frequency resource and/or the special preamble group is a narrowband special for transmitting the terminal to the base station, that is, the base station is notified that it is a narrowband terminal, and generally it is only used by the narrowband terminal.
  • the broadband terminal uses the special time-frequency resource and/or the random access preamble in the special preamble group, the effect of transmitting the narrowband terminal to the base station is also achieved.
  • Step S22 The terminal receives the first random access response sent by the base station to the terminal according to the random access preamble sent in step S11, and sends a message 3 to the base station according to the first random access response.
  • Step S23 The terminal receives the message for the narrowband terminal from the base station, and retransmits the retransmission message 3, and retransmits the message 3 to the base station according to the retransmission indication of the message 3. Or, it can be:
  • step S24 after the message 3 is sent to the base station according to the first random access response, the message 3 is retransmitted to the base station by means of active retransmission.
  • the message 3 retransmission indication for the narrowband terminal refers to the message 3 retransmission indication sent by the base station through the narrowband channel (the channel for the narrowband terminal to receive the control information), for example:
  • the terminal may receive the base station through the e-PDCCH.
  • the message 3 (received by the narrowband physical downlink control channel) retransmits the indication, and retransmits the message 3 according to the retransmission indication of the message 3. Since the e-PDCCH is a narrowband channel, the narrowband terminal can normally receive information transmitted through the e-PDCCH.
  • the base station may also send the message 3 retransmission indication in a manner that the base station can be received by the narrowband terminal, for example:
  • the terminal may also receive the base.
  • the second random access response sent by the station containing the message 3 retransmission indication is retransmitted according to the message 3 retransmission indication.
  • a RAR Window for Retransmission (narrowband response message retransmission receiving window) needs to be defined, and the base station transmits the message to the narrowband terminal through the second random access response. Pass instructions.
  • the terminal after transmitting the message 3 to the base station according to the first random access response, the terminal immediately enters a narrowband response message retransmission receiving window, and the terminal monitors the second random access response from the base station in the narrowband response message retransmission receiving window.
  • the narrowband terminal receives the message 4 valid from the base station at a certain time in the narrowband response message retransmission receiving window or the narrowband response message retransmission receiving window times out, then the terminal stops the Two random access response monitoring.
  • some reserved bits in the second random access response may be used as an indication of new data, so that the terminal Do a HARQ merger.
  • step S24 after transmitting the message 3 to the base station for the first time (ie, step S22), the terminal does not need the base station to perform scheduling, but actively performs one or more retransmissions of the message 3 to the base station, that is, "blind weight.” pass". At this time, the terminal does not know which message 3 transmitted to the base station is correctly received by the base station, but the base station can always receive the accurate message 3 by repeatedly transmitting the message 3 . In this manner, the number of retransmissions of the terminal may be limited, that is, there is a concept of a maximum number of retransmissions, which may be performed by the base station through an SIB (System Information Block) message or a first random connection. The incoming response is passed to the terminal.
  • SIB System Information Block
  • a timer is started. If the message 4 is not received after the timer expires, the random access fails. After the example of "blind retransmission", the start time of this timer should be delayed until the last retransmission message 3.
  • the embodiment of the present invention first transmits the narrowband characteristic of the terminal to the base station, so that when detecting that the message 3 has an error, the base station can transmit the message 3 retransmission to the terminal through the e-PDCCH or the second random access response suitable for the narrowband terminal to receive the information. It is indicated that when the PDCCH or the PHICH scheduling terminal is used for the retransmission of the message 3, the terminal cannot receive the retransmission indication of the message 3 in the PDCCH or the PHICH, and the implementation of the retransmission of the message 3 of the narrowband terminal is ensured. Moreover, the embodiment of the present invention can also implement the retransmission of the message 3 by using a "blind retransmission" manner.
  • FIG. 3 is a schematic flowchart diagram of a second embodiment of a method for retransmitting a message according to the present invention.
  • 2 is an embodiment of the retransmission of message 3 from the base station side, which includes:
  • Step S31 The base station analyzes the received random access preamble from the terminal, and learns that the terminal is a narrowband terminal.
  • the terminal Corresponding to the two ways in which the terminal informs the base station that it is a narrowband terminal in step S21.
  • the base station also has two analysis modes, and it can be known that the terminal is a narrowband terminal:
  • the base station analyzes the time-frequency resources used by the random access preamble.
  • the time-frequency resource used is a time-frequency resource that represents a narrowband characteristic
  • the terminal is a narrowband terminal.
  • the time-frequency resource is a special time-frequency resource introduced for the narrowband terminal.
  • the terminal uses the special time-frequency resource, the terminal is considered to have a narrowband characteristic, and the time-frequency resource can be a PRACH resource.
  • the base station analyzes the random access preamble, and when the random access preamble is a random access preamble indicating a narrowband characteristic, it is known that the terminal is a narrowband terminal.
  • the random access preamble may be grouped in advance, and one set of preamble groups is defined as a special preamble group indicating narrowband characteristics, and the received random preamble is any random access in the special preamble group.
  • the terminal is considered to have a narrowband characteristic, that is, a narrowband terminal.
  • the foregoing two analysis methods can be performed at the same time.
  • the terminal is known as a narrowband terminal.
  • the above special time-frequency resources and/or special preamble groups are dedicated for narrowband terminals, but if the broadband terminal uses the above special time-frequency resources and/or random access in a special preamble group. In the case of the preamble, the fact that the wideband terminal has a narrowband characteristic is also analyzed.
  • Step S32 The base station sends a first random access response to the terminal according to the random access preamble received in step S31.
  • Step S33 The base station receives the message 3 sent by the terminal according to the first random access response, and when detecting that the received message 3 has an error, sends a message 3 retransmission indication to the terminal for the narrowband terminal; or, it may be:
  • Step S34 The base station receives the message 3 sent by the terminal according to the first random access response, and when detecting that the received message 3 has an error, the receiving terminal retransmits the message 3 by means of active retransmission.
  • Step S33 and step S34 are two ways of correcting the message 3.
  • the base station may send a message 3 retransmission indication to the terminal through the e-PDCCH. Since the e-PDCCH is a narrowband channel, the message 3 retransmission indication sent by the e-PDCCH can be The narrowband terminal is correctly received. Alternatively, the base station may also send a second random access response containing a message 3 retransmission indication to the terminal.
  • step S34 when the base station detects that there is an error in the message 3, the base station does not need to perform scheduling, because the base station knows that the terminal will actively retransmit the message 3, and the base station only needs to wait for the message 3 uploaded by the receiving terminal to be merged, and needs to be explained. Therefore, once the base station receives the accurate message 3, it stops receiving the remaining message 3 of the terminal.
  • the base station may further limit the number of retransmissions of the narrowband terminal, that is, the maximum number of retransmissions of the terminal needs to be indicated. Specifically, the maximum number of retransmissions may be indicated by an SIB message or a first random access response.
  • the SIB message or the first random access response is extended to carry the maximum number of retransmissions and sent to the terminal.
  • the SIB message is broadcasted by the base station, and is valid for all narrowband terminals, and the first random access response is for a specific narrowband terminal, so the first random access response is used to indicate the maximum number of retransmissions. It can be dynamically configured for different narrowband terminals.
  • the base station after analyzing the received random access preamble from the terminal, the base station knows the fact that the terminal is a narrowband terminal, and when detecting that the message 3 has an error, the base station may receive the e-PDCCH or the e-PDCCH suitable for the narrowband terminal.
  • the second random access response transmits a message 3 retransmission indication to the terminal, and when the PDCCH or the PHICH scheduling terminal is used for the retransmission of the message 3, the terminal cannot receive the retransmission indication of the message 3 in the PDCCH or the PHICH, and the retransmission fails. The situation occurs, ensuring the implementation of message 3 retransmission for narrowband terminals.
  • the base station in this embodiment can also wait for the message 3 sent by the terminal in a "blind retransmission" manner.
  • FIG. 4 is a schematic structural diagram of an embodiment of a terminal for realizing retransmission of a message 3 of the present invention.
  • the terminal 1 is a narrowband terminal, and includes:
  • the processing unit 11 is configured to notify the base station terminal 1 that the base station terminal 1 is a narrowband terminal when transmitting the random access preamble to the base station.
  • the processing unit 11 transmits a random access preamble to the base station using a time-frequency resource representing a narrowband characteristic.
  • a special time-frequency resource is introduced for the narrowband terminal.
  • the processing unit 11 uses the special time-frequency resource to send the random access preamble, the terminal 1 is considered to have a narrowband characteristic, that is, the terminal 1 is a narrowband terminal;
  • the time-frequency resource can be a PRACH resource.
  • the processing unit 11 transmits a random access preamble indicating a narrowband characteristic to the base station.
  • the random access preambles are grouped, and one set of preamble groups is defined as a special preamble group indicating narrowband characteristics.
  • the processing unit 11 uses any random access preamble in the special preamble group, it is sent to In the case of a base station, the terminal 1 has a narrowband characteristic, that is, the terminal 1 is a narrowband terminal.
  • the processing unit 11 first selects a random access preamble to be transmitted to the base station from a special preamble group indicating a narrowband characteristic, and then uses a special time capable of indicating a narrowband characteristic.
  • the frequency resource transmits the selected random access preamble.
  • the random access preamble in the special bead time-frequency resource and/or the special preamble group is a narrowband special for transmitting the terminal to the base station, and generally it is only used by the narrowband terminal, but if the broadband terminal uses the
  • the special time-frequency resources and/or the random access preamble in the special preamble group also achieve the effect of transmitting the narrowband characteristics to the base station, that is, the base station considers it to be a narrowband terminal unless otherwise proved by the evidence. Actually it is a broadband terminal.
  • the receiving unit 12 is configured to receive a first random access response that is sent by the base station according to the random access preamble sent by the processing unit 11.
  • the processing unit 11 is configured to send a message 3 to the base station according to the first random access response received by the receiving unit 11.
  • the receiving unit 12 is configured to receive a message 3 retransmission indication from the base station for the narrowband terminal. Generally, when the base station detects that there is an error in the received message 3, it will send a message 3 retransmission indication to the terminal.
  • the receiving unit 12 may receive the message 3 retransmission indication sent by the base station through the e-PDCCH (narrowband physical downlink control channel). Since the e-PDCCH is a narrowband channel, the message 3 retransmission unit 13 can normally receive the information transmitted through the e-PDCCH. Or,
  • the receiving unit 12 may also receive a second random access response that is sent by the base station and includes a message 3 retransmission indication.
  • the second random access response is used to send the message 3 retransmission indication, it is required to define a RAR Window for Retransmission (narrowband response message retransmission receiving window) for the base station to transmit the message to the narrowband terminal through the second random access response.
  • Retransmit the instructions Generally, after the processing unit 11 transmits the message 3 to the base station according to the first random access response, the narrowband response message retransmission receiving window is immediately entered, and the receiving unit 12 monitors the second from the base station in the narrowband response message retransmission receiving window. Two random access responses.
  • the second random connection is stopped. Monitoring of incoming responses. Further, if a HARQ (Hybrid Automatic Retransmission Query) is performed between the terminal and the base station, the second random access may be performed. Some of the reserved bits in the response can be used to make an indication of new data for the terminal to do HARQ merging.
  • the processing unit 11 is configured to retransmit the message 3 to the base station according to the message 3 retransmission indication received by the receiving unit 12 for the narrowband terminal.
  • the retransmission of the message 3 can also be implemented by using the active retransmission of the terminal 1 in this manner:
  • the processing unit 11 is configured to retransmit the message 3 to the base station by using an active retransmission after sending the message 3 to the base station.
  • the processing unit 11 does not need to perform scheduling by the base station, and actively performs one or more retransmissions of the message 3 to the base station, that is, "blind retransmission". At this time, the processing unit 11 does not know which message 3 transmitted to the base station is accurately received by the base station, but by repeatedly transmitting the message 3 multiple times, the base station can always accurately receive the message 3.
  • the number of retransmissions of the processing unit 11 may be limited, that is, there is a concept of a maximum number of retransmissions, and the maximum number of retransmissions may be passed by the base station through an SIB (System Information Block) message or A random access response is delivered to the terminal.
  • SIB System Information Block
  • a timer is started. If the message 4 is not received after the timer expires, the random access fails. After referencing "blind retransmission", the start time of this timer should be delayed until the last retransmission message 3.
  • the embodiment of the present invention first transmits the narrowband characteristic of the terminal to the base station, so that when detecting that the message 3 has an error, the base station can transmit the message 3 retransmission to the terminal through the e-PDCCH or the second random access response suitable for the narrowband terminal to receive the information. It is indicated that when the PDCCH or the PHICH scheduling terminal is used for the retransmission of the message 3, the terminal cannot receive the retransmission indication of the message 3 in the PDCCH or the PHICH, and the implementation of the retransmission of the message 3 of the narrowband terminal is ensured. Moreover, the embodiment of the present invention can also implement the retransmission of the message 3 by using the method of "blind retransmission".
  • the base station Since the terminal has reported to the base station that it has a narrowband characteristic, the base station knows that the terminal can use the "blind retransmission" manner to message. 3 retransmission, so the base station does not consider the terminal transmission confusion even if it receives multiple messages 3 without indication.
  • FIG. 5 is a schematic structural diagram of a base station embodiment for retransmission of a message 3 according to the present invention.
  • the base station 2 includes:
  • the receiving unit 21 is configured to receive a random access preamble from the base station.
  • the analyzing unit 22 is configured to analyze the random access preamble from the terminal received by the receiving unit 21, and learn that the terminal is a narrowband terminal.
  • the analyzing unit 22 is configured to analyze the random access preamble from the terminal received by the receiving unit 21, and learn that the terminal is a narrowband terminal.
  • the analyzing unit 22 analyzes the time-frequency resources used by the random access preamble.
  • the used time-frequency resource is a time-frequency resource indicating a narrowband characteristic
  • the terminal has a narrowband characteristic, that is, a narrowband terminal.
  • the time-frequency resource here is a special time-frequency resource introduced for the narrowband terminal.
  • the terminal uses the special time-frequency resource, the terminal is regarded as a narrowband characteristic.
  • the time-frequency resource can be a PRACH resource.
  • the other is that the analyzing unit 22 analyzes the random receiving preamble, and when the random receiving preamble is a random access preamble indicating the narrowband characteristic, the terminal has the information of the narrowband characteristic.
  • the random access preamble may be grouped in advance, and one set of preamble groups is defined as a special preamble group indicating narrowband characteristics, and the received random access preamble is any random access preamble in the special preamble group.
  • the terminal is considered to have a narrowband characteristic, that is, a narrowband terminal.
  • the foregoing two analysis methods can be performed at the same time.
  • the terminal is known as a narrowband terminal.
  • the random access preamble in the special time-frequency resource and/or the special preamble group is dedicated to the narrowband terminal, but if the broadband terminal uses the special time-frequency resource and/or the special preamble described above, When the preamble is randomly accessed in the code group, it is also considered that the wideband terminal has a narrowband characteristic unless otherwise evidenced that it actually has a broadband characteristic.
  • the sending unit 23 is configured to send, according to the random access preamble received by the receiving unit 21, a first random access response to the terminal.
  • the receiving unit 21 is configured to receive, by the terminal, the message 3 sent by the terminal to the base station according to the first random access response.
  • the detecting unit 24 is configured to detect the message 3 received by the receiving unit 21.
  • the sending unit 23 is configured to: when the analyzing unit 22 knows that the terminal is a narrowband terminal, and the detecting unit 24 detects that the message 3 has an error, send a message 3 retransmission indication for the narrowband terminal to the terminal.
  • the sending unit 23 may send a message 3 retransmission indication to the terminal through the e-PDCCH. Since the e-PDCCH is a narrowband channel, the message 3 retransmission indication transmitted through the e-PDCCH can be correctly received by the narrowband terminal. Alternatively, the second random access response including the message 3 retransmission indication may be sent to the terminal to implement a retransmission indication.
  • the receiving unit 21 is configured to: when the analyzing unit 22 knows that the terminal is a narrowband terminal, and the detecting unit 24 detects that there is an error in the message 3, the receiving terminal retransmits the message 3 to the base station by means of active retransmission.
  • the receiving unit 21 since the receiving unit 21 knows that the narrowband terminal retransmits the message 3 by means of active retransmission, Therefore, when the detecting unit 24 detects that the message 3 is in error, the receiving unit 21 only needs to wait for the terminal to upload the message 3. It should be noted that, after receiving the accurate message 3, the receiving unit 21 stops receiving the remaining uploaded message of the terminal. 3.
  • the base station may further limit the number of retransmissions of the narrowband terminal, that is, the maximum number of retransmissions of the terminal needs to be indicated. Specifically, the maximum number of retransmissions may be sent by the sending unit 23 through the SIB message or the first random number.
  • the access response is sent to the terminal, for example: the SIB message or the first random access response is extended to carry the maximum number of retransmissions and sent to the terminal.
  • the SIB message is broadcast, so it is effective for all narrowband terminals, and the first random access response can be for a specific narrowband terminal, so when a random access response is used to indicate the maximum number of retransmissions, The maximum number of retransmissions can be dynamically configured for different narrowband terminals.
  • the base station analyzes the received random access preamble from the terminal, and recognizes that the terminal has a narrowband characteristic, so that when the base station detects that there is an error in the message 3, the base station can receive the information by using the e-PDCCH or the second suitable for the narrowband terminal.
  • the random access response transmits a message 3 retransmission indication to the terminal, so that when the PDCCH or the PHICH scheduling terminal is used for the retransmission of the message 3, the terminal cannot receive the information in the PDCCH or the PHICH, and the retransmission failure occurs, ensuring the narrowband.
  • the base station can also wait for the blind retransmission of the terminal to implement retransmission of the message 3.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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Abstract

本发明实施例公开了一种消息的重传方法，其主要是终端在向基站发送随机接入前导码时，通知基站其为窄带终端；在基站后续检测到终端发送的消息3存差错时，基站可以通过针对窄带终端的消息3重传指示，指示终端进行消息3重传，或者终端采用主动重传消息3的方式向基站重传消息3。本发明实施例还公开了一种终端和基站。采用本发明，可以实现窄带终端在随机接入过程中的消息3重传。

Description

一种消息的重传方法及终端、 基站 技术领域
本发明涉及随机接入过程， 尤其涉及一种消息的重传方法及终端、 基站。 背景技术
在 3GPP ( The 3rd Generation Partnership Project, 第三代合作伙伴项目）会 议上， 有运营商提出了支持低带宽 （例如： 1.4M带宽） 的窄带终端的概念。 由 于窄带终端支持的带宽低， 因此可以显著地降低终端的生产成本， 其在 M2M(Machme to Machine, 物联网）中具有较好的应用前景。
但是， 现有中还没有一种很好的方式能够支持窄带终端在随机接入过程中 的消息 3重传， 消息 3是终端在随机接入过程中， 当接收到基站发送的对其有 效的随机接入响应时， 利用该随机接入响应中的授权信息向基站发送的数据。 发明内容
本发明实施例所要解决的技术问题在于， 提供一种消息的重传方法及终端、 基站， 可以实现窄带终端在随机接入过程中的消息 3重传。
一方面， 本发明实施例提供了一种消息的重传方法， 包括：
终端在向基站发送随机接入前导码时， 通知所述基站所述终端为窄带终端； 所述终端接收所述基站根据所述随机接入前导码向所述终端发送的第一随 机接入响应， 并根据所述第一随机接入响应， 向所述基站发送消息 3；
所述终端接收来自基站的针对窄带终端的消息 3 重传指示， 并根据所述消 息 3重传指示， 向所述基站重传所述消息 3 , 或者
所述终端根据笫一随机接入响应向所述基站发送消息 3之后， 采用主动重 传的方式向所述基站重传所述消息 3。
一方面， 本发明实施例还提供了一种消息 3的重传方法， 包括：
基站分析接收的来自终端的随机接入前导码， 得知所述终端为窄带终端； 所述基站根据所述随机接入前导码， 向所述终端发送第一随机接入响应； 所述基站接收所述终端根据所述第一随机接入响应发送的消息 3 ,并当检测 到所述消息 3存在差错时， 向所述终端发送针对窄带终端的消息 3重传指示或 者接收所述终端采用主动重传的方式重传的所述消息 3。
一方面， 本发明实施例还提供了一种终端， 包括：
处理单元， 用于在向基站发送随机接入前导码时， 通知所述基站所述终端 为窄带终端；
接收单元， 用于接收所述基站根据所述发送单元发送的随机接入前导码发 送的第一随机接入响应；
所述处理单元， 还用于根据所述接收单元接收的第一随机接入响应， 向所 述基站发送消息 3 ;
所述接收单元， 还用于接收来自基站的针对窄带终端的消息 3重传指示； 所述处理单元， 还用于根据所述接收单元接收的针对窄带终端的消息 3 重 传指示， 向所述基站重传所述消息 3 , 或者在发送所述消息 3之后， 采用主动重 传的方式向所述基站重传所述消息 3。
一方面， 本发明实施例还提供了一种基站， 包括：
接收单元， 用于接收来自基站的随机接入前导码；
分析单元， 用于分析所述接收单元接收的来自终端的随机接入前导码， 得 知所述终端为窄带终端；
发送单元， 用于所述接收单元接收的所述随机接入前导码， 向所述终端发 送第一随机接入响应；
所述接收单元， 还用于接收所述终端根据所述第一随机接入响应向所述基 站发送的消息 3 ;
检测单元， 用于检测所述接收单元接收的消息 3；
所述发送单元， 用于当所述检测单元检测到所述消息 3存在差错时， 向所 述终端发送针对窄带终端的消息 3 重传指示， 或者， 所述接收单元， 用于当所 迷检测单元检测到所述消息 3存在差错时， 接收所述终端采用主动重传的方式 向所述基站重传的所述消息 3。
实施本发明实施例， 具有如下有益效果：
针对现有中当窄带终端做随机接入时 , 由于基站并不知道终端为窄带终端， 因此当基站接收的由终端上传的消息 3存在差错时，基站仍然以传统的方式（针 对宽带终端的方式）调度窄带终端进行消息 3 重传， 从而造成窄带终端由于无 法接收针对宽带终端的消息 3重传指示， 而不能够正常地实现消息 3的重传的 问题， 本发明实施例在向基站发送随机接入前导码时， 通知基站其为窄带终端， 因此在基站后续检测到终端上传的消息 3存在差错时， 基站可以采用针对窄带 终端的消息 3重传方式调度终端进行消息 3的重传， 或者终端直接采用主动重 传的方式向基站重传消息 3 , 由于前述中基站已知道其为窄带终端， 因此基站不 会误认为终端传输出现混乱； 通过以上方式， 本发明实施例实现了窄带终端的 消息 3重传， 提高了窄带终端随机接入过程的成功率。 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， 对于本领域普通技术人员来讲， 在不付 出创造性劳动的前提下， 还可以根据这些附图获得其他的附图。
图 1是随机接入过程的流程示意图；
图 2是本发明的消息的重传方法的第一实施例的流程示意图；
图 3是本发明的消息的重传方法的笫二实施例的流程示意图；
图 4是本发明的终端的实施例的结构示意图；
图 5是本发明的基站的实施例的结构示意图。 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。 基于本发明中的实施例， 本领域普通技术人员在没有作出创造 性劳动前提下所获得的所有其他实施例， 都属于本发明保护的范围。
首先， 对随机接入过程进行说明。 如图 1所示， 其包括：
过程一： 终端首先确定一个将要发送给基站的随机接入前导码， 然后选择 能够发送这样的随机接入前导码的 PRACH ( Physical Random Access Channel, 物理随机访问信道）资源 ,接着执行发送。这里的随机接入前导码被称为 Message 1 (消息 1 ), 简称 Msgl。
过程二： 终端发送了随机接入前导码之后， 该终端尝试在 RAR ( Random Access Response, 随机接入响应）接收窗口内接收来自基站的随机接入响应。 这 里的随机接入响应被称为 Message 2 (消息 2 )， 简称 Msg2。 一般地， 随机接入 响应通常包括： 随机接入前导码标识、 UL ( Uplmk, 上行）授权、 临时 C-RNTI ( Cell Radio Network Temporary Identifier， 小区无线网络临时标识）和时间对准 命令。
过程三： 如果终端接收到对其有效的随机接入响应， 则分别处理接收的随 机接入响应中的信息，也就是： 终端应用时间对准命令， 并且存储临时 C-RNTI; 此外， UL授权用于向基站发送在终端的緩沖器中存储的数据或新生成的数据， 这里，通过使用 UL授权发送的数据通常被称为 Message 3(消息 3 ),简称 Msg3。
过程四： 在终端使用随机接入响应中包含的 UL授权发送数据之后，终端尝 试接收 PDCCH ( Physical Downlink Control Channel , 物理下行控制信道）， 以 接收特定消息； 此处， 若终端在超时之前正常接收到 PDCCH, 则认为以正常的 方式执行了随机接入过程， 并且结束随机接入过程。 过程四中接收的消息通常 被称为 Message4 (消息 4 ), 简称 Msg4。
在上述过程三中， 当基站接收到终端发送的消息 3 后， 如果基站对消息 3 进行差错侦测， 发现消息 3 存在差错时， 基站一般是通过 PDCCH或 PHICH ( Physical Hybrid ARQ Indicator Channel, 物理混合重传指示信道 )调度终端重 发消息 3， 当采用混合自动重传时， 即使消息 3 没有出错， 基站也依旧是通过 PHICH向终端发送确认（ACK )指示。 由于基站在随机接入过程中并不知道终 端是窄带终端， 还是宽带终端， 因此基站均会采用 PDCCH或 PHICH调度终端 进行消息 3的重传， 而窄带终端由于不能够接收 PDCCH或 PHICH, 因此无法 支持窄带终端的消息 3重传机制的实现。
然后， 对窄带终端的消息 3重传过程进行说明。
下述中的终端或窄带终端是指各种类型的用户设备， 如移动通信终端、 UE(User Equipment, 用户设备)， ME(Mobile Equipment, 移动设备)和支持各种 类型的无线通信技术的其它装置。下述中的基站包括但不限于：节点 B(Node B)、 eNB(evolved Node B， 演进型基站）， 接入点。 本发明实施例涉及窄带终端随机 接入基站的过程， 尤其涉及在接入过程中适合窄带终端的消息 3的重传机制。
请参考图 2， 是本发明的消息的重传方法的第一实施例的流程示意图。 图 2 的方法流程是从终端侧对消息 3的重传过程进行了说明， 其包括：
步骤 S21 , 终端在向基站发送随机接入前导码时， 通知基站其为窄带终端。 此处介绍两种通知基站其为窄带终端的方式：
一是， 终端使用表示窄带特性的时频资源向基站发送随机接入前导码。 此 处为窄带终端引入特珠的时频资源， 当终端使用这些特殊的时频资源发送随机 接入前导码时， 则视为该终端具有窄带特性， 即为窄带终端。 此处的时频资源 可以为 PRACH资源。
另一是， 终端向基站发送表示窄带特性的随机接入前导码。 此处预先对随 机接入前导码进行分组， 定义其中一組前导码组为表示窄带特性的特珠前导码 組， 当终端使用该特珠前导码组中的任一随机接入前导码， 并发送给基站时， 则视为该终端具有窄带特性， 即为窄带终端。
需要说明的是， 以上两种实施方式可以同时进行， 即终端首先从表示窄带 特性的特殊前导码组中选择将要发送给基站的随机接入前导码， 然后使用能够 表示窄带特性的特殊时频资源发送所选择的随机接入前导码。
需要说明的是， 特殊时频资源和 /或特殊前导码组中的随机接入前导码是用 于向基站传递终端的窄带特殊， 即告诉基站其为窄带终端， 通常其仅供窄带终 端使用， 但是如果宽带终端使用该特殊时频资源和 /或特殊前导码组中的随机接 入前导码， 也同样会达到向基站传递其为窄带终端的效果。
步骤 S22,终端接收基站根据步骤 S11发送的随机接入前导码向终端发送的 第一随机接入响应， 并根据第一随机接入响应， 向基站发送消息 3。
此处与图 1中的过程二相同， 在此不赘述。
步骤 S23 ,终端接收来自基站的针对窄带终端的消息 3重传指示重传消息 3 , 并根据消息 3重传指示， 向基站重传消息 3。 或者， 也可以是：
步骤 S24, 在步骤 S22根据第一随机接入响应向所述基站发送消息 3之后， 采用主动重传的方式向所述基站重传所述消息 3。
其中， 针对窄带终端的消息 3 重传指示是指基站通过窄带通道（供窄带终 端接收控制信息的信道）发送的消息 3重传指示， 例如： 在步骤 S23 中， 终端 可以接收基站通过 e-PDCCH (窄带物理下行控制信道 )发送的消息 3重传指示， 并根据该消息 3重传指示， 重传消息 3。 由于 e-PDCCH为窄带的信道， 因此窄 带终端能够正常接收通过 e-PDCCH发送的信息。
针对窄带终端的消息 3 重传指示， 也可以是指基站通过基它能够被窄带终 端接收的方式发送消息 3重传指示， 例如： 在步骤 S23中， 终端也可以接收基 站发送的含有消息 3重传指示的第二随机接入响应， 并根据该消息 3重传指示， 重传消息 3。 当采用第二随机接入响应发送消息 3 重传指示时， 需要定义一个 RAR Window for Retransmission (窄带响应消息重传接收窗）， 用于基站通过第二 随机接入响应向窄带终端传递消息 3 重传指示。 通常， 终端根据第一随机接入 响应， 向基站发送消息 3之后， 立即进入窄带响应消息重传接收窗口， 终端在 该窄带响应消息重传接收窗口监测来自基站的第二随机接入响应。 此处需要说 明的是， 如果在窄带响应消息重传接收窗口内的某时刻窄带终端接收到了来自 基站的对其有效的消息 4 时或者窄带响应消息重传接收窗口超时时， 那么终端 停止对第二随机接入响应的监测。 进一步地， 如果终端和基站间是进行 HARQ(Hybrid Automatic Retransmission Query,混合自动重传请求），那么可以将 第二随机接入响应中的一些预留的比特用于做新数据的指示， 以便终端做 HARQ合并。
在步骤 S24中， 终端在第一次向基站发送消息 3 (即步骤 S22 )之后， 不需 要基站进行调度， 而是主动地向基站进行一次或多次消息 3的重传，也就是 "盲 重传"。 此时， 终端并不知道哪一次向基站发送的消息 3被基站正确接收， 但是 通过多次重复传输消息 3 , 基站总能接收到准确的消息 3。 在此种方式中， 终端 的重传次数可以受限， 即存在一个最大重传次数的概念， 该最大重传次数可以 由基站通过 SIB ( System Information Block, 系统信息块 ) 消息或第一随机接入 响应传递给终端。 需要说明的是， 现有中当终端第一次向基站发送消息 3之后， 会启动一个定时器， 如果该定时器超时后仍没有收到消息 4, 则认为随机接入失 败， 那么本发明实施例引用 "盲重传" 后， 该定时器的启动时间应延迟至最后 一次重传消息 3之后。
本发明实施例首先向基站传递终端的窄带特性， 从而使得基站在检测到消 息 3存在差错时， 可以通过适合窄带终端接收信息的 e-PDCCH或第二随机接入 响应向终端传递消息 3重传指示， 避免使用 PDCCH或 PHICH调度终端进行消 息 3重传时，终端无法接收 PDCCH或 PHICH中的消息 3重传指示的情况发生， 保证了窄带终端的消息 3 重传的实现。 并且， 本发明实施例还可以采用 "盲重 传" 的方式实现消息 3 的重传， 由于终端已向基站报告了其具有窄带特性， 因 此基站知道终端可以采用 "盲重传'， 的方式进行消息 3 的重传， 因此基站即使 在没有指示的情况下， 接收到多条消息 3也不会认为终端传输混乱。 请参考图 3 , 是本发明的消息的重传方法的第二实施例的流程示意图。 图 2 实施例是从基站侧说明消息 3的重传， 其包括：
步骤 S31 ,基站分析接收的来自终端的随机接入前导码，得知终端为窄带终 端。
相应于步骤 S21 中终端向基站通知其为窄带终端的两种方式。 步骤 S31 中 基站也有两种分析方式， 可以得知终端为窄带终端：
一是， 基站分析随机接入前导码所使用的时频资源， 当使用的时频资源为 表示窄带特性的时频资源时， 得到终端为窄带终端。 此处的时频资源是为窄带 终端引入的特殊时频资源， 当分析到终端使用这些特殊的时频资源时， 则视为 该终端具有窄带特性， 该时频资源可以为 PRACH资源。
另一是， 基站分析随机接入前导码， 当随机接入前导码为表示窄带特性的 随机接入前导码时， 得知终端为窄带终端。 此处可以预先对随机接入前导码进 行分组， 定义其中一组前导码组为表示窄带特性的特殊前导码组， 当接收的随 机接收前导码为该特殊前导码组中的任一随机接入前导码时， 视为该终端具有 窄带特性， 即为窄带终端。
需要说明的是， 上述两种分析方式可以同时进行， 只要有任一分析结果表 明终端具有窄带特性时， 即得知终端为窄带终端。
需要说明的是， 上述特殊的时频资源和 /或特殊的前导码组是供窄带终端专 用的， 但是如果宽带终端使用上述特殊的时频资源和 /或特殊的前导码组中的随 机接入前导码时， 同样会分析出宽带终端具有窄带特性这一事实。
步骤 S32,基站根据步驟 S31接收的随机接入前导码， 向终端发送第一随机 接入响应。
步骤 S33 , 基站接收终端根据第一随机接入响应发送的消息 3 , 并当检测到 接收的消息 3存在差错时， 向终端发送针对窄带终端的消息 3重传指示； 或者， 也可以是：
步骤 S34, 基站接收终端根据第一随机接入响应发送的消息 3 , 并当检测到 接收的消息 3存在差错时， 接收终端采用主动重传的方式重传的消息 3。
其中， 步骤 S33和步骤 S34是对消息 3进行纠错的两种方式。
步驟 S33 中， 基站可以通过 e-PDCCH向终端发送消息 3重传指示。 由于 e-PDCCH为窄带的信道， 因此通过 e-PDCCH发送的消息 3重传指示， 可以被 窄带终端正确接收。 或者， 基站也可以向终端发送含有消息 3 重传指示的第二 随机接入响应。
在步骤 S34中， 当基站检测到消息 3存在差错时， 基站不需要进行调度， 因为基站知道终端会主动重传消息 3 ,基站只需要等待接收终端上传的消息 3并 进行合并即可， 需要说明的是， 基站一旦接收到准确的消息 3 , 即停止接收终端 其余上传的消息 3。 在此种实施方式中，基站还可以对窄带终端的重传次数进行 限制， 即需要指示终端的最大重传次数， 具体地， 该最大重传次数可以通过 SIB 消息或第一随机接入响应指示给终端， 即对 SIB 消息或第一随机接响应进行扩 展， 使其携带上最大重传次数， 发送给终端。 需要说明的是， SIB消息是由基站 进行广播发送， 其对所有窄带终端均有效， 而第一随机接入响应是可以针对特 定的窄带终端， 因此采用第一随机接入响应指示最大重传次数时， 可以针对不 同的窄带终端动态地配置。
本发明实施例基站通过分析接收的来自终端的随机接入前导码， 得知终端 为窄带终端的事实后， 基站在检测到消息 3存在差错时， 可以通过适合窄带终 端接收信息的 e-PDCCH或第二随机接入响应向终端传递消息 3重传指示，避免 使用 PDCCH或 PHICH调度终端进行消息 3重传时，终端由于无法接收 PDCCH 或 PHICH中的消息 3重传指示， 而导致重传失败的情况发生， 保证了窄带终端 的消息 3 重传的实现。 并且， 本实施例基站还可以等待终端以 "盲重传" 的方 式发送的消息 3。
下面对本发明实施例的设备进行说明。
请参考图 4,是本发明的用于实现消息 3的重传的终端的实施例的结构示意 图。 该终端 1为窄带终端， 其包括：
处理单元 11 , 用于在向基站发送随机接入前导码时， 通知基站终端 1为窄 带终端。
此处介绍两种通知基站终端 1为窄带终端的方式：
一是， 处理单元 11使用表示窄带特性的时频资源向基站发送随机接入前导 码。 此处为窄带终端引入特殊的时频资源， 当处理单元 11使用这些特殊的时频 资源发送随机接入前导码时， 则视为终端 1具有窄带特性， 即终端 1 为窄带终 端； 此处的时频资源可以为 PRACH资源。
另一是， 处理单元 11向基站发送表示窄带特性的随机接入前导码。 此处预 先对随机接入前导码进行分组， 定义其中一组前导码组为表示窄带特性的特殊 前导码组， 当处理单元 11使用该特殊前导码组中的任一随机接入前导码， 并发 送给基站时， 则终端 1具有窄带特性， 即终端 1为窄带终端。
需要说明的是， 以上两种实施方式可以同时进行， 即处理单元 11首先从表 示窄带特性的特殊前导码组中选择将要发送给基站的随机接入前导码， 然后使 用能够表示窄带特性的特殊时频资源发送所选择的随机接入前导码。
需要说明的是， 特珠时频资源和 /或特珠前导码组中的随机接入前导码是用 于向基站传递终端的窄带特殊， 通常其仅供窄带终端使用， 但是如果宽带终端 使用该特殊时频资源和 /或特殊前导码组中的随机接入前导码， 也同样会达到向 基站传递其具有窄带特性的效果， 也就是说基站会认为其为窄带终端， 除非另 有证据证明其实际为宽带终端。
接收单元 12，用于接收基站根据处理单元 11发送的随机接入前导码发送的 第一随机接入响应。
处理单元 11， 用于根据接收单元 11接收的第一随机接入响应， 向基站发送 消息 3。
接收单元 12, 用于接收来自基站的针对窄带终端的消息 3重传指示。 一般 地， 当基站检测到接收的消息 3存在差错时， 会向终端发送消息 3重传指示。
其中， 接收单元 12可以接收基站通过 e-PDCCH (窄带物理下行控制信道） 发送的消息 3重传指示。 由于 e-PDCCH为窄带的信道， 因此消息 3重传单元 13 能够正常接收通过 e-PDCCH发送的信息。 或者，
接收单元 12也可以接收基站发送的含有消息 3重传指示的第二随机接入响 应。 当釆用第二随机接入响应发送消息 3 重传指示时， 需要定义一个 RAR Window for Retransmission (窄带响应消息重传接收窗），用于基站通过第二随机接 入响应向窄带终端传递消息 3重传指示。 通常， 在处理单元 11 4艮据第一随机接 入响应， 向基站发送消息 3之后， 立即进入窄带响应消息重传接收窗口， 接收 单元 12在该窄带响应消息重传接收窗口监测来自基站的第二随机接入响应。 此 处需要说明的是， 如果在窄带响应消息重传接收窗口内的某时刻接收到了来自 基站的对其有效的消息 4 时或者窄带响应消息重传接收窗口超时时， 那么停止 对第二随机接入响应的监测。进一步地，如果终端和基站间是进行 HARQ(Hybrid Automatic Retransmission Query , 混合自动重传请求）， 那么可以将第二随机接入 响应中的一些预留的比特可以用于做新数据的指示， 以便终端做 HARQ合并。 处理单元 11 ,用于根据接收单元 12接收的针对窄带终端的消息 3重传指示， 向基站重传所述消息 3。
本实施例中也可以采用终端 1主动重传的方式实现消息 3的重传， 在此种 方式中：
处理单元 11 ， 用于在向基站发送消息 3之后， 采用主动重传的方式向基站 重传所述消息 3。
此种实施方式中， 处理单元 11在第一次向基站发送消息 3之后， 不需要基 站进行调度， 主动地向基站进行一次或多次消息 3的重传， 也就是 "盲重传"。 此时， 处理单元 11并不知道哪一次向基站发送的消息 3被基站准确接收了， 但 是通过多次重复传输消息 3， 总能使基站准确地接收到消息 3。 在此种实施方式 中， 处理单元 11的重传次数可以受限， 即存在一个最大重传次数的概念， 该最 大重传次数可以由基站通过 SIB ( System Information Block, 系统信息块） 消息 或第一随机接入响应传递给终端。 需要说明的是， 现有中当第一次向基站发送 消息 3之后， 会启动一个定时器， 如果该定时器超时后仍没有收到消息 4, 则认 为随机接入失败， 那么本发明实施例引用 "盲重传" 后， 该定时器的启动时间 应延迟至最后一次重传消息 3之后。
本发明实施例首先向基站传递终端的窄带特性， 从而使得基站在检测到消 息 3存在差错时， 可以通过适合窄带终端接收信息的 e-PDCCH或第二随机接入 响应向终端传递消息 3重传指示， 避免使用 PDCCH或 PHICH调度终端进行消 息 3重传时，终端无法接收 PDCCH或 PHICH中的消息 3重传指示的情况发生， 保证了窄带终端的消息 3 重传的实现。 并且， 本发明实施例还可以采用 "盲重 传" 的方式实现消息 3 的重传， 由于终端已向基站报告了其具有窄带特性， 因 此基站知道终端可以采用 "盲重传" 的方式进行消息 3 的重传， 因此基站即使 在没有指示的情况下， 接收到多条消息 3也不会认为终端传输混乱。
请参考图 5， 是本发明的用于消息 3的重传的基站实施例的结构示意图。 该 基站 2包括：
接收单元 21， 用于接收来自基站的随机接入前导码。
分析单元 22， 用于分析接收单元 21接收的来自终端的随机接入前导码， 得 知终端为窄带终端。 此处为两种分析方式：
一是， 分析单元 22分析随机接入前导码所使用的时频资源， 当使用的时频 资源为表示窄带特性的时频资源时， 得到终端具有窄带特性， 即为窄带终端。 此处的时频资源是为窄带终端引入的特殊时频资源， 当分析到终端使用这些特 殊的时频资源时， 则视为该终端为窄带特性。 该时频资源可以为 PRACH资源。
另一是， 分析单元 22分析随机接收前导码， 当随机接收前导码为表示窄带 特性的随机接入前导码时， 得到终端具有窄带特性的信息。 可以预先对随机接 入前导码进行分组， 定义其中一组前导码组为表示窄带特性的特殊前导码组， 当接收的随机接入前导码为该特殊前导码组中的任一随机接入前导码时， 视为 该终端具有窄带特性， 即为窄带终端。
需要说明的是， 上述两种分析方式可以同时进行， 只要有任一分析结果表 明终端具有窄带特性时， 即得知终端为窄带终端。
需要说明的是， 上述特殊的时频资源和 /或特殊的前导码组中的随机接入前 导码是为窄带终端专用的， 但是如果宽带终端使用上述特殊的时频资源和 /或特 殊的前导码组中的随机接入前导码时， 同样视为宽带终端具有窄带特性， 除非 另有证据证明其实际具有的是宽带特性。
发送单元 23 , 用于根据接收单元 21接收的随机接入前导码， 向终端发送第 一随机接入响应。
接收单元 21， 用于接收终端根据第一随机接入响应向基站发送的消息 3。 检测单元 24， 用于检测接收单元 21接收的消息 3。
发送单元 23 , 用于当分析单元 22得知终端为窄带终端， 且检测单元 24检 测到消息 3存在差错时， 向所述终端发送针对窄带终端的消息 3重传指示。
其中， 发送单元 23可以通过 e-PDCCH向终端发送消息 3重传指示。 由于 e-PDCCH为窄带的信道， 因此通过 e-PDCCH发送的消息 3重传指示， 可以被 窄带终端正确接收。 或者， 也可以向终端发送含有消息 3 重传指示的第二随机 接入响应， 实现重传指示。
或者， 接收单元 21， 用于当分析单元 22得知所述终端为窄带终端， 且检测 单元 24检测到消息 3存在差错时， 接收终端采用主动重传的方式向基站重传的 消息 3。
此处， 由于接收单元 21知道窄带终端会釆用主动重传的方式重传消息 3， 因此接收单元 21在检测单元 24检测到消息 3 出错时， 只需要等待终端上传消 息 3即可， 需要说明的是， 接收单元 21—旦接收到准确的消息 3 , 即停止接收 终端其余上传的消息 3。 在此种实施方式中，基站还可以对窄带终端的重传次数 进行限制， 即需要指示终端的最大重传次数， 具体地， 该最大重传次数可以通 过发送单元 23通过 SIB消息或第一随机接入响应指示给终端， 例如： 对 SIB消 息或第一随机接响应进行扩展， 使其携带上最大重传次数， 发送给终端。 需要 说明的是， SIB消息是进行广播， 因此其对所有窄带终端均有效， 而第一随机接 入响应是可以针对特定的窄带终端， 因此采用笫一随机接入响应指示最大重传 次数时， 可以针对不同的窄带终端动态地配置最大重传次数。
本发明实施例基站通过分析接收的来自终端的随机接入前导码， 认识到终 端具有窄带特性， 从而基站在检测到消息 3存在差错时， 可以通过适合窄带终 端接收信息的 e-PDCCH或第二随机接入响应向终端传递消息 3重传指示，避免 使用 PDCCH或 PHICH调度终端进行消息 3重传时，终端由于无法接收 PDCCH 或 PHICH中的信息， 而导致重传失败的情况发生， 保证了窄带终端的消息 3重 传的实现。 并且， 本实施例基站还可以等待终端的盲重传的方式实现消息 3 的 重传。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程， 是可以通过计算机程序来指令相关的硬件来完成， 所述的程序可存储于一计算 机可读取存储介质中， 该程序在执行时， 可包括如上述各方法的实施例的流程。 其中， 所述的存储介质可为磁碟、 光盘、 只读存储记忆体（Read-Only Memory, ROM )或随机存储记忆体（Random Access Memory, RAM )等。
以上所揭露的仅为本发明较佳实施例而已， 当然不能以此来限定本发明之 权利范围， 本领域普通技术人员可以理解实现上述实施例的全部或部分流程， 并依本发明权利要求所作的等同变化， 仍属于发明所涵盖的范围。

Claims

权 利 要 求
1、 一种消息的重传方法， 其特征在于， 包括：
终端在向基站发送随机接入前导码时， 通知所述基站所述终端为窄带终端； 所述终端接收所述基站根据所述随机接入前导码向所述终端发送的第一随 机接入响应， 并根据所述第一随机接入响应， 向所述基站发送消息 3；
所述终端接收来自基站的针对窄带终端的消息 3 重传指示， 所述终端根据 所述消息 3重传指示， 向所述基站重传所述消息 3 , 或者
所述终端根据第一随机接入响应向所述基站发送消息 3之后， 采用主动重 传的方式向所述基站重传所述消息 3。
2、 如权利要求 1所述的方法， 其特征在于， 所述终端在向基站发送随机接 入前导码时， 通知所述基站所述终端为窄带终端， 包括：
所述终端使用表示窄带特性的时频资源向所述基站发送所述随机接入前导 码， 以通知所述基站所述终端为窄带终端， 和 /或， 所述终端向所述基站发送表 示窄带特性的随机接入前导码， 以通知所述基站所述终端为窄带终端。
3、 如权利要求 1或 2所述的方法， 其特征在于， 所述终端接收来自基站的 针对窄带终端的消息 3重传指示， 包括：
所述终端接收基站通过窄带物理下行控制信道 e-PDCCH向所述终端发送的 消息 3重传指示； 或者
所述终端接收来自基站的含有消息 3重传指示的第二随机接入响应。
4、 如权利要求 1或 2所述的方法， 其特征在于， 当所述终端采用主动重传 的方式向所述基站重传所述消息 3时， 所述终端重传所述消息 3的次数不超过 所述基站指示的最大重传次数。
5、 如权利要求 4所述的方法， 其特征在于的， 所述终端重传所述消息 3的 次数不超过所述基站指示的最大重传次数， 包括：
所述终端重传所述消息 3的次数不超过所述基站通过系统信息块 SIB消息 或第一随机接入响应指示的最大重传次数。
6、 一种消息的重传方法， 其特征在于， 包括：
基站分析接收的来自终端的随机接入前导码， 得知所述终端为窄带终端； 所述基站根据所述随机接入前导码， 向所述终端发送第一随机接入响应； 所述基站接收所述终端根据所述第一随机接入响应发送的消息 3 ,并当检测 到所述消息 3存在差错时， 向所述终端发送针对窄带终端的消息 3重传指示或 者接收所述终端采用主动重传的方式重传的所述消息 3。
7、 如权利要求 6所述的方法， 其特征在于， 所述基站分析接收的来自终端 的随机接入前导码， 得知所述终端为窄带终端， 包括：
所述基站分析接收的来自终端的随机接入前导码 , 当所述随机接入前导码 使用的时频资源为表示窄带特性的时频资源时， 得知所述终端为窄带终端； 或 者
所述基站分析接收的来自终端的随机接收前导码， 当所述随机接收前导码 为表示窄带特性的随机接入前导码时， 得知所述终端为窄带终端。
8、 如权利要求 6或 7所述的方法， 其特征在于， 所述向所述终端发送针对 窄带终端的消息 3重传指示， 包括：
通过窄带物理下行控制信道 e-PDCCH向所述终端发送消息 3重传指示， 或 者， 向所述终端发送含有消息 3重传指示的第二随机接入响应。
9、 如权利要求 6-8中任一项所述的方法， 其特征在于， 所述接收所述终端 采用主动重传的方式重传的所述消息 3之前， 还包括：
所述基站指示所述终端采用主动重传的方式重传所迷消息 3 时， 所述终端 的最大重传次数。
10、 如权利要求 9所述的方法， 其特征在于， 所述基站指示所述终端采用 主动重传的方式重传所述消息 3时， 所述终端的最大重传次数， 包括：
所述基站通过将携带有所述最大重传次数的 SIB消息或第一随机接入响应 发送给所述终端， 以指示所述终端的最大重传次数。
11、 一种终端， 其特征在于， 包括：
处理单元， 用于在向基站发送随机接入前导码时， 通知所述基站所述终端 为窄带终端；
接收单元， 用于接收所述基站根据所述发送单元发送的随机接入前导码发 送的第一遣机接入响应；
所述处理单元， 用于根据所述接收单元接收的第一随机接入响应， 向所述 基站发送消息 3;
所述接收单元， 用于接收来自基站的针对窄带终端的消息 3重传指示； 所述处理单元， 用于根据所述接收单元接收的针对窄带终端的消息 3 重传 指示， 向所述基站重传所述消息 3 , 或者在发送所述消息 3之后， 采用主动重传 的方式向所述基站重传所述消息 3。
12、 如权利要求 11所述的终端， 其特征在于，
所述处理单元， 用于使用表示窄带特性的时频资源向所述基站发送所述随 机接入前导码和 /或向所述基站发送表示窄带特性的随机接入前导码， 以通知所 述基站所述终端为窄带终端。
13、 如权利要求 11或 12所述的终端， 其特征在于，
所述接收单元， 用于接收所述基站通过窄带物理下行控制信道 e-PDCCH向 所述终端发送的消息 3重传指示； 或者
所述接收单元， 用于接收来自基站的含有消息 3 重传指示的第二随机接入 响应。
14、 如权利要求 11-13中任一项所述的终端， 其特征在于，
所述处理单元， 用于当采用主动重传的方式向所述基站重传所述消息 3时， 重传所述消息 3的次数不超过所述基站指示的最大重传次数。
15、 如权利要求 14所述的终端， 其特征在于的， 所述处理单元， 用于当釆用主动重传的方式向所述基站重传所述消息 3时， 重传所述消息 3的次数不超过所述基站通过系统信息块 SIB消息或第一随机接 入响应指示的最大重传次数。
16、 一种基站， 其特征在于， 包括：
接收单元， 用于接收来自基站的随机接入前导码；
分析单元， 用于分析所述接收单元接收的来自终端的随机接入前导码， 得 知所述终端为窄带终端；
发送单元， 用于所述接收单元接收的所述随机接入前导码， 向所述终端发 送第一随机接入响应；
所述接收单元， 还用于接收所述终端根据所述第一随机接入响应向所述基 站发送的消息 3;
检测单元， 用于检测所述接收单元接收的消息 3；
所述发送单元， 用于当所述检测单元检测到所述消息 3存在差错时， 向所 述终端发送针对窄带终端的消息 3 重传指示， 或者， 所述接收单元， 用于当分 析单元得知所述终端为窄带终端， 且所述检测单元检测到所述消息 3存在差错 时， 接收所述终端采用主动重传的方式向所述基站重传的所述消息 3。
17、 如权利要求 16所述的基站， 其特征在于，
所述分析单元， 用于分析所述接收单元接收的来自终端的所述随机接入前 导码所使用的时频资源， 当所述使用的时频资源为表示窄带特性的时频资源时， 得知所述终端为窄带终端； 或者
所述分析单元， 用于分析所述接收单元接收的来自终端的所述随机接收前 导码， 当所述随机接收前导码为表示窄带特性的随机接入前导码时， 得知所述 终端为窄带终端。
18、 如权利要求 16或 17所述的基站， 其特征在于，
所述发送单元， 用于通过窄带物理下行控制信道 e-PDCCH向所述终端发送 消息 3重传指示， 或者， 用于向所述终端发送含有消息 3重传指示的第二随机 接入响应。
19、 如权利要求 16-18中任一项所述的基站， 其特征在于， 所述发送单元， 还用于在所述接收单元接收所迷终端采用主动重传的方式 重传的所述消息 3之前， 指示所迷终端采用主动重传的方式重传所述消息 3时， 所述终端的最大重传次数。
20、 如权利要求 19所述的基站， 其特征在于，
所述发送单元， 用于通过将携带有所述最大重传次数的 SIB消息或第一随 机接入响应发送给所述终端， 以指示所述终端的最大重传次数。
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016025899A1 (en) * 2014-08-15 2016-02-18 Interdigital Patent Holding, Inc. Supporting random access and paging procedures for reduced capability wtrus in an lte system
CN108141334A (zh) * 2015-07-27 2018-06-08 瑞典爱立信有限公司 Nb lte prach设计
WO2019213917A1 (zh) * 2018-05-10 2019-11-14 北京小米移动软件有限公司 数据传输方法、装置、系统及存储介质
CN110831228A (zh) * 2018-08-10 2020-02-21 华为技术有限公司 一种通信方法及装置

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10708953B2 (en) 2016-04-18 2020-07-07 Qualcomm Incorporated Random access retransmission procedure
US10849011B2 (en) * 2016-10-14 2020-11-24 Qualcomm Incorporated Rach procedures using multiple PRACH transmissions
BR112020002947A2 (pt) 2017-08-11 2020-08-11 Telefonaktiebolaget Lm Ericsson (Publ) retransmissão de dados antecipados de mensagem 3
WO2019213974A1 (zh) * 2018-05-11 2019-11-14 华为技术有限公司 随机接入过程中消息传输的方法及相关装置
CN112385170B (zh) * 2018-05-16 2023-11-24 瑞典爱立信有限公司 成本有效的prach检测
WO2020061980A1 (zh) * 2018-09-28 2020-04-02 华为技术有限公司 一种测量配置方法及装置
CN115280882A (zh) * 2020-03-12 2022-11-01 诺基亚技术有限公司 启用能力降低的新无线电（nr）设备的接入
WO2021223893A1 (en) 2020-05-08 2021-11-11 Telefonaktiebolaget Lm Ericsson (Publ) Narrowband aas receiver with data replay interfacing
CN112204909B (zh) * 2020-08-27 2023-12-29 北京小米移动软件有限公司 盲重传方法和装置、盲重传指示方法和装置
WO2023272675A1 (en) * 2021-07-01 2023-01-05 Qualcomm Incorporated Response to ue requesting msg3 pusch repetitions

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101052140A (zh) * 2007-05-09 2007-10-10 中兴通讯股份有限公司 一种处理单播接入终端识别指配失败的方法
CN101562836A (zh) * 2008-04-18 2009-10-21 中兴通讯股份有限公司 基站响应消息重传方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7643535B1 (en) * 2006-07-27 2010-01-05 L-3 Communications Titan Corporation Compatible preparation and detection of preambles of direct sequence spread spectrum (DSSS) and narrow band signals
KR20090002779A (ko) * 2007-07-04 2009-01-09 삼성전자주식회사 이동통신 시스템에서 프리앰블 전송 전력 제어 방법 및장치
WO2009082303A1 (en) 2007-12-20 2009-07-02 Telefonaktiebolaget Lm Ericsson (Publ) Prescheduled retransmission for initial establishment
US8315273B2 (en) * 2009-04-10 2012-11-20 Qualcomm Incorporated Bandwidth segmentation and multi-segment operation and control
CN101695196B (zh) * 2009-10-20 2011-08-31 普天信息技术研究院有限公司 一种提高竞争模式下随机接入成功率的方法、系统和装置
KR101770209B1 (ko) * 2009-12-03 2017-08-22 엘지전자 주식회사 무선 통신 시스템에서 셀간 간섭 저감 방법 및 장치
KR101480259B1 (ko) * 2011-07-15 2015-01-08 엘지전자 주식회사 가변 대역폭을 지원하는 통신 방법 및 무선기기
US9232540B2 (en) * 2011-09-30 2016-01-05 Qualcomm Incorporated Random access channel design for narrow bandwidth operation in a wide bandwidth system
US9924498B2 (en) * 2012-03-12 2018-03-20 Qualcomm Incorporated Selecting a cell identifier based on a downlink control information

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101052140A (zh) * 2007-05-09 2007-10-10 中兴通讯股份有限公司 一种处理单播接入终端识别指配失败的方法
CN101562836A (zh) * 2008-04-18 2009-10-21 中兴通讯股份有限公司 基站响应消息重传方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"Definition of Relative Narrowband TX Power Indicator", 3GPP TSG-RAN MEETING #53, R1-082184, 9 May 2008 (2008-05-09), XP050110489 *
"Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures (Release 10)", 3GPP TS 36.213 V 10.4.0, January 2012 (2012-01-01), XP055159922 *

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107079499B (zh) * 2014-08-15 2020-06-02 交互数字专利控股公司 在lte系统中支持用于能力缩减的wtru的随机接入和寻呼过程
US11647545B2 (en) 2014-08-15 2023-05-09 Interdigital Patent Holdings, Inc. Supporting random access and paging procedures for reduced capability WTRUs in an LTE system
WO2016025899A1 (en) * 2014-08-15 2016-02-18 Interdigital Patent Holding, Inc. Supporting random access and paging procedures for reduced capability wtrus in an lte system
KR20170067725A (ko) * 2014-08-15 2017-06-16 인터디지탈 패튼 홀딩스, 인크 Ｌｔｅ 시스템에서의 감소된 능력의 ｗｔｒｕ들을 위한 랜덤 액세스 및 페이징 절차들의 지원
US12069736B2 (en) 2014-08-15 2024-08-20 Interdigital Patent Holdings, Inc. Supporting random access and paging procedures for reduced capability WTRUs in an LTE system
CN107079499A (zh) * 2014-08-15 2017-08-18 交互数字专利控股公司 在lte系统中支持用于能力缩减的wtru的随机接入和寻呼过程
US10306680B2 (en) 2014-08-15 2019-05-28 Interdigital Patent Holdings, Inc. Supporting random access and paging procedures for reduced capability WTRUs in an LTE system
US10674544B2 (en) 2014-08-15 2020-06-02 Interdigital Patent Holdings, Inc. Supporting random access and paging procedures for reduced capability WTRUs in an LTE system
KR102419760B1 (ko) 2014-08-15 2022-07-13 인터디지탈 패튼 홀딩스, 인크 Ｌｔｅ 시스템에서의 감소된 능력의 ｗｔｒｕ들을 위한 랜덤 액세스 및 페이징 절차들의 지원
CN108141334A (zh) * 2015-07-27 2018-06-08 瑞典爱立信有限公司 Nb lte prach设计
CN108141334B (zh) * 2015-07-27 2021-08-10 瑞典爱立信有限公司 Nb lte prach设计
US11757595B2 (en) 2015-07-27 2023-09-12 Telefonaktiebolaget Lm Ericsson (Publ) NB LTE PRACH design
WO2019213917A1 (zh) * 2018-05-10 2019-11-14 北京小米移动软件有限公司 数据传输方法、装置、系统及存储介质
US11641667B2 (en) 2018-05-10 2023-05-02 Beijing Xiaomi Mobile Software Co., Ltd. Methods, apparatuses and systems for transmitting data, and storage medium
US11528744B2 (en) 2018-05-10 2022-12-13 Beijing Xiaomi Mobile Software Co., Ltd. Methods, apparatuses and systems for transmitting data, and storage medium
CN110831228B (zh) * 2018-08-10 2021-08-13 华为技术有限公司 一种通信方法及装置
CN110831228A (zh) * 2018-08-10 2020-02-21 华为技术有限公司 一种通信方法及装置

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US20150092740A1 (en) 2015-04-02
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