WO2013166964A1 - Procédé et dispositif de transmission à regroupement de multiples tti, programme informatique et support de stockage - Google Patents

Procédé et dispositif de transmission à regroupement de multiples tti, programme informatique et support de stockage Download PDF

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Publication number
WO2013166964A1
WO2013166964A1 PCT/CN2013/075319 CN2013075319W WO2013166964A1 WO 2013166964 A1 WO2013166964 A1 WO 2013166964A1 CN 2013075319 W CN2013075319 W CN 2013075319W WO 2013166964 A1 WO2013166964 A1 WO 2013166964A1
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WO
WIPO (PCT)
Prior art keywords
rtt
transmission
determined
retransmissions
slot
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PCT/CN2013/075319
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English (en)
Chinese (zh)
Inventor
韩璐
王锐
胡丽洁
沈晓冬
胡臻平
Original Assignee
中国移动通信集团公司
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Publication of WO2013166964A1 publication Critical patent/WO2013166964A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/28—Flow control; Congestion control in relation to timing considerations
    • H04L47/283—Flow control; Congestion control in relation to timing considerations in response to processing delays, e.g. caused by jitter or round trip time [RTT]

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a multi-slot bundling transmission method and apparatus, a computer program, and a storage medium.
  • multi-slot bundling (TTI bundling) technology is generally adopted.
  • Continuous time slot (TTI) bundling transmission obtains the reliability of transmission, and solves the problem of improving coverage.
  • FIG. 1 shows a schematic diagram of an existing multi-slot bundle transmission.
  • the characteristics of the existing multi-slot bundling technology are as follows:
  • the time interval between transmissions is 16ms.
  • the solution of multi-slot splicing technology can improve 3 ⁇ 41?
  • the uplink coverage of the service the characteristics of the ⁇ 3 ⁇ 4IP service are:
  • the transmission rate is 12,2Kbps.
  • the interval for sending packets is 20ms, that is, a new packet is sent every 20ms.
  • TTI bundles are used for transmission, and coverage of the cell edge area can better ensure the transmission time and maximum delay requirements.
  • the inventors found through research that the overall design of the existing TTI bundling has at least insufficient TTIs for effective transmission, and the resource utilization rate is not strong, and the uplink coverage of the 3 ⁇ 4 IP service is enhanced. A limited problem.
  • FIG. 3 the timing diagram of the existing multi-slot bundling transmission, wherein FIG. 3 is to bundle the four TTIs in FIG. 2 into one particle (ie, the figure in order not to make the graph too long.
  • One of the grids in 3 represents 4 TTIs. It is obvious from the figure:
  • the number of TTIs that are actually valid for transmission is up to 16 (as shown in the non-blank grid in Figure 3), and at least 20% of the resources are wasted (as shown by the blank grid in Figure 3).
  • the embodiment of the invention provides a multi-slot bundling transmission method and device, a computer program and a storage medium, which increase the number of TTIs that are effectively used for transmission, improve resource utilization, and enhance uplink coverage.
  • a multi-slot bundle transmission method includes:
  • the network side determines the time interval RTTT of the two transmissions in the multi-slot bundling and the number N of bundled slots, the RTT is a positive number, and the N is a positive integer;
  • the network side transmits the determined RTT and the N to the terminal;
  • the RTT determined by the network side is not greater than 16 milliseconds, and/or the determined N is not less than 4;
  • the determined N is greater than 4.
  • the determined RTT is not equal to 16 milliseconds.
  • a multi-slot bundle transmission method includes:
  • the terminal receives the time interval RTT of the two transmissions in the multi-slot bundle transmitted by the network side, and the number N of bundled slots, where the RTT is a positive number, and the N is a positive integer;
  • the terminal performs uplink transmission according to the RTT and the N;
  • the RTT transmitted by the network side is not greater than 16 milliseconds, and/or, the N is not less than 4;
  • the N is greater than 4; If the N is 4, then the RTT is not equal to 16 milliseconds.
  • a multi-slot bundle transmission device comprising:
  • a first adjustment module configured to determine a time interval RTT of two transmissions in the multi-zero slot, the RTT being a positive number
  • a second adjustment module configured to determine the number N of timeslots bundled in the multi-day slot binding, where N is a positive integer
  • a sending module configured to transmit, by the RTT determined by the first adjusting module and the N determined by the second adjusting module, to the terminal;
  • the RTT determined by the first adjustment module is not greater than 16 milliseconds, and/or the N determined by the second adjustment module is not less than 4;
  • the N determined by the second adjustment module is greater than 4; when the N determined by the second adjustment module is 4, the The RTT determined by the first adjustment module is not equal to 16 milliseconds.
  • a multi-slot bundle transmission device comprising:
  • the receiving module, ⁇ receives the time interval RTT of the two transmissions in the multi-H slot bundle transmitted by the network side, and the number of bundled Ns, the RTT is a positive number, and the N is a positive integer;
  • a sending module configured to perform uplink transmission according to the RTT and the N;
  • the RTT transmitted by the network side is not greater than 16 milliseconds, and/or, the N is not less than 4;
  • the N is greater than 4.
  • the RTT is not equal to 16 milliseconds.
  • Embodiments of the present invention also provide a computer program for executing the above method and a storage medium storing the computer program.
  • the multi-slot bundling technology in the existing multi-slot bundling technology, a maximum of four consecutive time slots are used for bundling, and the interval between two transmissions is 16 ms, and the multi-slot bundling technology is improved by determining The time interval RTT of the two transmissions and the number N of the bundled gaps, wherein the determined RTT is a positive number not greater than 16 milliseconds, and/or the determined N A positive integer not less than 4. And when the RTT is 16 milliseconds, the N is greater than 4; and the N is 4, the RTT is not equal to 16 milliseconds.
  • the RTT is 16 milliseconds, the N is greater than 4; and the N is 4, the RTT is not equal to 16 milliseconds.
  • 3 is a timing diagram of multi-slot bundling transmission provided by the prior art
  • FIG. 4 is a flowchart of steps of a multi-slot binding transmission method according to Embodiment 1 of the present invention
  • FIG. 5 is a timing diagram of multi-slot congestion transmission according to Embodiment 2 of the present invention.
  • FIG. 6 is a sequence diagram of multi-time slot binding transmission according to Embodiment 2 of the present invention.
  • FIG. 8 is a timing diagram of multi-time slot binding transmission according to Embodiment 2 of the present invention.
  • FIG. 9 is a schematic structural diagram of a multi-slot bundle transmission device according to Embodiment 3 of the present invention
  • FIG. 10 is a schematic structural diagram of a multi-slot bundle transmission device according to Embodiment 4 of the present invention.
  • the existing TTI bimdlmg technology is optimized in the embodiment of the present invention.
  • the main idea is to adjust the number of TTIs bundled together and the time interval required for retransmission to achieve the following two objectives:
  • the number of times slot bindings N is 4, so 4 TTIs transmit data packets together, after the end of the #3 sub-packet transmission
  • the ACK/NACK message will be sent in the #7 subframe to indicate whether the data packet is transmitted correctly. If it is NAO, the transmission error will occur, and the system will retransmit until the transmission is correct or the maximum retransmission is reached. frequency.
  • the time interval between transmissions is defined as RTT roimd trip time).
  • the time slot bundling length, the RTT transmission time interval, and the maximum number of retransmissions need to be set and optimized.
  • the length of the gap bundle, the RTT time, and the maximum number of retransmissions. The transmission of voice and data into a communication system.
  • the first embodiment of the present invention provides a multi-slot bundling transmission method.
  • the process of the method may be a network side, such as a base station.
  • the process of the method may be as shown in FIG. 4, and includes:
  • Step 101 Determine a time interval RTT and a number of time slots N.
  • the existing multi-slot bundling technology uses up to four consecutive time slots for bundling, and the time interval between two transmissions is 16 ms, for multi-slots. Bundle technology to improve.
  • the time interval RTT of the two transmissions in the multi-slot bundling and the number N of the bundled time slots may be determined, where the RTT is a positive number, and the N is a positive integer.
  • the determined RTT is no more than 16 milliseconds, and/or, the determined N is not less than 4. And, if the determined RTT is 16 milliseconds, the determined N is greater than 4; if the determined N is 4, the determined RTT is not equal to 16 milliseconds.
  • the number of TTIs that are effectively used for transmission is increased, resource utilization is improved, and performance loss caused by insufficient power in the edge scenario can be reduced. The problem, thus enhancing the uplink coverage.
  • Step 102 Determine the number of retransmissions.
  • the number of TTIs that are effectively used for transmission is increased, and resource utilization is improved, thereby enhancing uplink coverage. It is also possible to adjust the number of retransmissions to further increase the number of TTIs that are effectively used for transmission, thereby improving resource utilization.
  • a maximum of three retransmissions are performed, that is, a total of four transmissions are performed.
  • the number of retransmissions determined in this embodiment may be greater than three, and may not be greater than three.
  • the interval RTT, the number of slots N, and the number of retransmissions may be determined by any one of the following three methods: Manner 1: The number of time slots used for transmission within the maximum delay of the ffi service determines the number of RTT, N, and retransmissions.
  • the maximum delay required by the service may be determined, and the time interval of the two transmissions in the multi-slot bundling is determined according to the number of time slots used for transmission in the maximum delay is not lower than the first set value, The number of retransmissions and the number of timeslots bundled.
  • the number of time slots for transmission in the multi-slot bundle, the number of times of retransmission, and the time of bundling can be determined according to the maximum delay of 50 ms required by the VoIP service.
  • the number of gaps can be determined according to the maximum delay of 50 ms required by the VoIP service.
  • the time interval RTT. of the two transmissions, the number of bundled slots N, and the number of retransmissions can be determined, so that the number of H slots used for transmission within the maximum delay required by the service meets the requirements, thereby achieving Increase the number of valid FFIs in the transmission of TTIs, improve resource utilization, and enhance the purpose of uplink coverage.
  • Manner 2 Determine the number of RTTs, Ns, and retransmissions by using the number of time slots used for transmission during the transmission interval of the service.
  • the transmission interval H between the service requirements is determined, and the time of two transmissions in the multi-slot bundling is determined according to the number of time slots used for transmission in the transmission interval is not lower than the second set value.
  • Interval, number of retransmissions, and number of bundled slots are determined according to the maximum number of time slots used for transmission in the transmission interval is not lower than the second set value. number.
  • the maximum number of time slots for transmission in the 20 ms transmission interval required by the VoIP service is not less than 16, and the time interval, number of retransmissions, and bundling of the two transmissions in the multi-slot bundling are determined.
  • the number of time slots is not less than 16.
  • the number of TTIs used for transmission improves resource utilization and enhances uplink coverage.
  • Method 3 Determine the TT, N and the number of retransmissions by using the difference between the maximum delay of transmission and the maximum delay required by the service.
  • the maximum delay required by the service may be determined, and the time interval RTT of the two transmissions in the multi-slot shackle is determined according to the difference between the maximum delay of the transmission and the maximum delay required by the service.
  • the number N of bundled time slots and the number of retransmissions are determined, wherein the maximum transmission delay indicates the length of time taken during the last transmission of the execution.
  • the maximum transmission delay may be expressed as the sum of the number N of bundled times and the product of the number of retransmissions and the time interval RTT of two transmissions.
  • the maximum delay required by the service is 50ms, and the difference between the maximum delay of transmission and the maximum delay required by the IP service is 10ms.
  • the time interval, the number of retransmissions, and the number of bundled times in the multi-slot bundling are determined, and the maximum delay of the transmission can be ensured to meet the set requirements, thereby ensuring that an increase in effective transmission is achieved. Number, improve resource utilization, and enhance the purpose of uplink coverage.
  • the time interval RTT of the two transmissions in the multi-slot bundling, the number N of bundled slots, and the retransmission may be determined by using, but not limited to, the maximum delay required by the service and the transmission interval of the Z or the required transmission interval.
  • the number of times, and other methods, such as determining the interval RTT of two transmissions in the multi-slot bundle, the number of slots N to be bundled, and the number of retransmissions may be determined according to other service parameters.
  • the execution body of step 101 and step 102 in this embodiment may be the network side. After the network side determines the time interval TT., the number of slots N, and the number of retransmissions, the determined time interval RTT, time may also be determined. The number of slots N and the number of retransmissions are transmitted to the terminal, and the terminal is instructed to perform uplink transmission according to the interval RTT, the number of slots N, and the number of retransmissions. Specifically, the network side may transmit the determined time interval RTT., the number of slots N, and the number of retransmissions to the terminal by using specified signaling.
  • the network side may transmit the determined interval RTT, the number of slots N, and the number of retransmissions to the terminal according to a manner agreed in advance with the terminal. Then, the terminal can parse out the time interval RTT, the number of slots N, and the number of retransmissions according to a predetermined manner, and analyze the time interval RTT and time slot. The number N and the number of retransmissions are uplinked.
  • the RTT is determined to be 12 milliseconds, the number of retransmissions is 4, and N is 4 (schema 1).
  • the timing diagram of multi-slot bundling transmission can be as shown in FIG. 5.
  • the determined RTT is 15 milliseconds, the number of retransmissions is 3, and N is 5 (schema 2).
  • the timing diagram of multi-slot congestion transmission can be as shown in Figure 6.
  • the RTT is determined to be 14 milliseconds, the number of retransmissions is 2, and N is 6 (scheme 3).
  • the timing diagram of multi-slot bundling transmission can be as shown in Figure 7.
  • the determined TT is 30 milliseconds
  • the number of retransmissions is 1 time
  • N is 10 (scenario 4).
  • the timing diagram of multi-slot congestion transmission can be as shown in Figure 8.
  • the maximum number of transmissions is the number of retransmissions plus one, and the maximum transmission delay indicates the length of time occupied by the last transmission after the completion of the execution (can be expressed as the number of bundled slots N, and the number of retransmissions and two transmissions)
  • the sum of the products of the time interval RTT is used to transmit the number of TTIs expressed in the VoIP requirements.
  • the resource utilization rate represents the maximum number of time slots used for transmission in the 20 ms transmission interval required by the IP service, and the ratio of the transmission interval time.
  • Scheme 1, Scheme 2, Scheme 3, and Scheme 4 reduce the number of TTI bundlings and/or change the number of retransmissions by reducing RTT and/or Thereby increasing the number of TTIs for transmission.
  • the effective number of schemes 1 increases from 16 to 20
  • the effective number of schemes 2 increases from 16 to 20
  • the effective number of scheme 3 increases from 16 to 18.
  • the effective number of four increases from 16 to 20, increasing power accumulation and time diversity gain.
  • resource utilization has also increased by 20%, 20%, 10% and 20%, respectively.
  • Embodiment 3 is provided based on the same inventive concept as the first embodiment and the second embodiment of the present invention.
  • the third embodiment of the present invention provides a multi-slot bundling transmission device, which can be integrated on the network side.
  • the structure of the device can be as shown in FIG.
  • the first adjustment module 11 is configured to determine a time interval RTT of the two transmissions in the multi-slot bundle, where the RTT is a positive number;
  • the second adjustment module 12 is configured to determine the number of slots to be bundled in the multi-slot bundle, ⁇ is a positive integer;
  • the sending module 16 is configured to transmit the RTT determined by the first adjusting module and the ⁇ determined by the second adjusting module to the terminal, where the RTT determined by the first adjusting module is not greater than 16 milliseconds, and/or, the second adjustment module determines that the ⁇ is not less than 4.
  • the ⁇ determined by the second adjustment module is greater than 4; when the ⁇ determined by the second adjustment module is 4, The RTT determined by the first adjustment module is not equal to 16 milliseconds.
  • the apparatus also includes a third adjustment module 13:
  • the third adjustment module 13 is configured to determine the number of retransmissions in the multi-slot bundle.
  • the sending module 16 is specifically configured to transmit, by the RTT determined by the first adjusting module, the number of retransmissions determined by the N and the third adjusting module determined by the second adjusting module to the terminal.
  • the apparatus also includes a first determining module 14:
  • the first determining module 14 is configured to determine a maximum delay of the service requirement;
  • the first adjustment module 11 is specifically configured to determine a time interval RTT of two transmissions in the multi-slot bundling according to a difference between the maximum delay of the transmission and the maximum delay of the service request, where the transmission The maximum delay indicates the length of time during which the last transmission ⁇ is performed after the execution is completed;
  • the second adjustment module 12 is specifically configured to determine, according to a difference between the maximum delay of the transmission and the maximum delay of the service requirement, the number N of times slots bundled in the multi-slot congestion;
  • the third adjusting module 13 is specifically configured to determine the number of retransmissions according to a difference between a maximum delay of transmission and a maximum delay required by the service.
  • the first adjustment module 11 may further determine that the time interval RTT of the two transmissions in the multi-slot bundling is determined according to the number of the slots used for transmission in the maximum delay is not lower than the first set value;
  • the second adjustment module 12 may be further configured to determine, according to the maximum number of time slots used for transmission, that the number of time slots for transmission is not lower than the first set value, and determine the number N of times slots bundled in multi-slot congestion;
  • the third adjustment module! 3 may be further configured to determine, according to the maximum time delay, the number of time slots used for transmission is not lower than the first set value, and determine the number of retransmissions.
  • the apparatus also includes a second determination module 15:
  • the second determining module 15 is configured to determine a transmission interval of the service requirement
  • the first adjustment module U is specifically configured to determine, according to the number of time slots used for transmission in the transmission interval, not less than a second set value, to determine a time interval RTT of two transmissions in the multi-slot bundling;
  • Two adjustment modules! 2 is specifically configured to determine, according to the number of time slots used for transmission in the transmission interval, that the number of time slots bundled in the multi-slot bundle is N;
  • the third adjusting module 13 is specifically configured to determine the number of retransmissions according to the number of time slots used for transmission in the transmission interval is not lower than the second set value.
  • the fourth embodiment of the present invention provides a multi-slot bundling transmission device, which can be integrated in a terminal.
  • the structure of the device can be as shown in FIG. 10, and includes:
  • the receiving module 21 ⁇ is the time interval of two transmissions in the multi-slot bundling of the receiving network ⁇ transmission
  • the RTT and the bundled number of slots N is a positive number
  • the N is a positive integer.
  • the sending module 22 is configured to perform uplink transmission according to the RTT and the N.
  • the RTT transmitted by the network side is not greater than 16 milliseconds, and/or the N is not less than 4; and, if the RTT is 16 milliseconds, the N is greater than 4; if the N is 4
  • the RTT is not equal to 16 milliseconds.
  • the receiving module 21 is specifically configured to receive RTT, N, and retransmission times transmitted by the network side.
  • the sending module 22 specifically performs uplink transmission according to the RTT, the N, and the number of retransmissions.
  • the existing multi-slot bundling technology is improved.
  • the time interval RTT of the two transmissions in the multi-slot bundling By adjusting the time interval RTT of the two transmissions in the multi-slot bundling, the number N of bundled times, and the number of retransmissions, The time diversity gain is increased, the network performance is improved, the coverage capability of the network is enhanced, and the resource utilization of the transmission is increased, and the effectiveness is enhanced.
  • embodiments of the present application can be provided as a method, system, or computer program product.
  • the application can take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware.
  • the present application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the computer can be stored in the computer
  • the instructions in the production result include an article of manufacture of an instruction device that implements the functions specified in a block or blocks of a flow or a flow and/or a block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more flows of the flowchart and one or more of the blocks in the Z or block diagram.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Un mode de réalisation de la présente invention porte sur un procédé de fonctionnement d'un dispositif de transmission à regroupement de multiples intervalles de temps de transmission (TTI), consistant : à améliorer la technologie de regroupement de multiples TTI conformément aux caractéristiques des technologies de regroupement de multiples TTI existantes selon lesquelles au plus 4 TTI continus sont employés pour un regroupement et le temps de propagation en boucle (RTT) entre deux instants de transmission est de 16 ms ; et à déterminer le RTT entre deux instants de transmission dans le regroupement de multiples TTI, et le nombre (N) de TTI regroupés, le RTT déterminé étant un nombre positif inférieur ou égal à 16 ms, et/ou le nombre N déterminé étant un entier positif supérieur ou égal à 4. Quand le RTT est de 16 ms, le nombre N est supérieur à 4 ; et quand le nombre N est égal à 4, le RTT n'est pas égal à 16 ms. La présente invention augmente le nombre de TTI effectivement utilisés dans une transmission, améliore le taux d'utilisation des ressources et améliore la couverture de liaison montante.
PCT/CN2013/075319 2012-05-11 2013-05-08 Procédé et dispositif de transmission à regroupement de multiples tti, programme informatique et support de stockage WO2013166964A1 (fr)

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