WO2017049720A1 - Procédé de détection de canal, et appareil de détection de canal - Google Patents

Procédé de détection de canal, et appareil de détection de canal Download PDF

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Publication number
WO2017049720A1
WO2017049720A1 PCT/CN2015/093485 CN2015093485W WO2017049720A1 WO 2017049720 A1 WO2017049720 A1 WO 2017049720A1 CN 2015093485 W CN2015093485 W CN 2015093485W WO 2017049720 A1 WO2017049720 A1 WO 2017049720A1
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WO
WIPO (PCT)
Prior art keywords
channel
ecca
data
transmitted
detection process
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Application number
PCT/CN2015/093485
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English (en)
Chinese (zh)
Inventor
李明菊
朱亚军
张云飞
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宇龙计算机通信科技(深圳)有限公司
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Publication of WO2017049720A1 publication Critical patent/WO2017049720A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a channel detecting method and a channel detecting apparatus.
  • LTE Long Term Evolution
  • LTE Long Term Evolution
  • Wi-Fi Long Term Evolution
  • LBT Long Term Evolution
  • the LTE system needs an LBT mechanism. In this way, if the LTE detects that the channel is busy on the unlicensed spectrum, the LTE cannot occupy the frequency band, and if the channel is detected to be idle, it can be occupied.
  • an LBT mechanism based on LBE is proposed in the related art, as shown in FIG. 1.
  • the LBT-based LBT mechanism is cycle-free, and CCA is triggered as long as the service arrives. Detection, if the CCA detection is idle, immediately send signaling or data; if the channel is detected to be busy, take a random number N, N ranges from 1 to q, where q is the length of the contention window, and its value The range is 4 to 32.
  • the ECCA (Extended CCA) mechanism is adopted, that is, the random value N, N ranges from 1 to q. If the value is 8, it means that in the next consecutive CCA detection time, each The channel is detected at the CCA detection time. If the channel is detected to be idle, N-1, if the channel is detected to be busy, N is unchanged, and when N is 0, signaling or data is transmitted.
  • LBE adopts different ICCA (initial CCA) and ECCA values, where the first CCA test is called ICCA, and the time granularity is relatively large, such as 34us; when the channel busy is detected or the channel occupancy time is cut off, the time granularity of the ECCA is relatively small, such as 9us. .
  • ICCA initial CCA
  • each packet arrives at a certain size, and generally requires multiple maximum channel occupation times to be transmitted. If the channel is busy, the value of the contention window q may be large, and the time required for the ECCA process will be long. Then, after the end of one channel occupation time, the transmission point may not perform the ECCA process, but perform an initial ICCA channel detection before the data transmission, which will easily preempt the channel than the ECCA process, but this method affects the transmission point. Fairness in preempting unlicensed spectrum.
  • the present invention is based on at least one of the above technical problems, and proposes a new channel detection scheme, which can clarify the conditions for the sender to perform the ECCA process and the ICCA process, and effectively ensure the fairness of the sender when preempting the unlicensed spectrum.
  • a channel detection method including: determining, by a sender, whether a channel occupation time ends in a process of occupying a channel to transmit data; and determining that any channel occupation time ends, Turn on the ECCA channel detection process.
  • the end of the channel occupation time includes the following two situations: one is that the duration of occupying the channel reaches the maximum channel occupation time; and the other is that all data in the buffer is completely transmitted.
  • the method further includes: determining, at the end of the ECCA channel detection process, whether there is data to be transmitted; if it is determined that the data to be transmitted does not exist, entering an idle state, and starting ICCA when the data to be transmitted arrives a channel detecting process; determining whether to transmit the data to be transmitted according to a detection result of the ICCA channel detecting process.
  • the method further includes: if the data to be transmitted is already present when the ECCA channel detection process is started, or the data to be transmitted is in the After the end of the ECCA channel detection process, the data to be transmitted is determined according to the detection result of the ECCA channel detection process after the end of the ECCA channel detection process.
  • the method further includes: if the data to be transmitted arrives before the end of the ECCA channel detection process, at the end of the ECCA channel detection process Or, when the data to be transmitted arrives, restarting the ECCA channel detection process, and determining whether to send the data to be transmitted according to the detection result of the restarted ECCA channel detection process.
  • the method further includes:
  • Defer period process is performed after any one channel occupancy time ends, and before the ECCA channel detection process is turned on;
  • the defer period process is performed after the ECCA detection granularity.
  • a channel detecting apparatus including: a first determining unit, configured to determine, by a sender, whether a channel occupation time ends in a process of occupying a channel to transmit data; and a processing unit, configured to The first determining unit determines that the ECCA channel detecting process is started when any of the channel occupation time ends.
  • the end of the channel occupation time includes the following two situations: one is that the duration of occupying the channel reaches the maximum channel occupation time; and the other is that all data in the buffer is completely transmitted.
  • the method further includes: a second determining unit, configured to determine, at the end of the ECCA channel detection process, whether there is data to be transmitted; the processing unit is further configured to: The second determining unit determines that the data to be transmitted does not exist, controls the sender to enter an idle state, and starts an ICCA channel detecting process when the data to be transmitted arrives; the channel detecting apparatus further includes: And a sending unit, configured to determine, according to the detection result of the ICCA channel detecting process, whether to send the data to be transmitted.
  • the method further includes: a second sending unit, if the data to be transmitted already exists when the ECCA channel detecting process is started, or the data to be transmitted is in the ECCA channel detecting process Arriving before the end, after the end of the ECCA channel detection process, determining whether to transmit the data to be transmitted according to the detection result of the ECCA channel detection process.
  • the processing unit is further configured to: when the data to be transmitted arrives before the end of the ECCA channel detection process, at the end of the ECCA channel detection process or in the waiting When the transmitted data arrives, the ECCA channel detection process is restarted; the channel detecting apparatus further includes: a third sending unit, configured to determine whether to send the to-be-transmitted according to the detection result of the restarted ECCA channel detecting process The data.
  • the processing unit is further configured to:
  • Defer period process is performed after any one channel occupancy time ends, and before the ECCA channel detection process is turned on;
  • the defer period process is performed after the ECCA detection granularity.
  • the conditions for the sender to perform the ECCA process and the ICCA process can be clarified, and the fairness of the sender when preempting the unlicensed spectrum is effectively ensured.
  • FIG. 1 is a schematic diagram showing a frame structure of an LBT-based LBT mechanism
  • FIG. 2 shows a schematic diagram of a frame structure of an LBE mechanism including a defer period process
  • FIG. 3 shows a schematic flow chart of a channel detecting method according to an embodiment of the present invention
  • FIG. 4 shows a schematic block diagram of a channel detecting apparatus according to an embodiment of the present invention
  • Figure 5 shows a schematic block diagram of a base station in accordance with an embodiment of the present invention
  • Figure 6 shows a schematic block diagram of a terminal in accordance with an embodiment of the present invention.
  • FIG. 3 shows a schematic flow chart of a channel detecting method according to an embodiment of the present invention.
  • a channel detecting method includes:
  • Step 302 The sender determines whether the channel occupation time ends in the process of occupying the channel to transmit data.
  • Step 304 When it is determined that any of the channel occupation time ends, the ECCA channel detection process is started.
  • the end of the channel occupation time includes the following two situations: one is that the duration of occupying the channel reaches the maximum channel occupation time; and the other is that all data in the buffer is completely transmitted.
  • the method further includes: determining, by the end of the ECCA channel detection process, whether there is data to be transmitted; if it is determined that the data to be transmitted does not exist And entering an idle state, and when the data to be transmitted arrives, starting an ICCA channel detection process; determining whether to send the data to be transmitted according to the detection result of the ICCA channel detection process.
  • the technical solution clarifies the conditions for the sender to perform the ICCA process. Specifically, when the ECCA channel detection process ends, if the data to be transmitted still does not arrive, the sender can enter the idle state. State, when there is data to be transmitted, the ICCA channel detection process is performed.
  • the step of determining whether to send data to be transmitted according to the detection result of the ICCA channel detection process specifically includes: if the ICCA channel detection process detects that the channel is idle, transmitting data to be transmitted; if the ICCA channel detection process detects that the channel is busy, The data to be transmitted is not sent.
  • the method further includes: if the data to be transmitted is already present when the ECCA channel detection process is started, or the data to be transmitted is in the After the end of the ECCA channel detection process, the data to be transmitted is determined according to the detection result of the ECCA channel detection process after the end of the ECCA channel detection process.
  • the step of determining whether to send the data to be transmitted according to the detection result of the ECCA channel detection process specifically includes: if the ECCA channel detection process detects that the channel is idle, transmitting the data to be transmitted; if the ECCA channel detection process detects that the channel is busy, The data to be transmitted is not sent.
  • the method further includes: if the data to be transmitted arrives before the end of the ECCA channel detection process, at the end of the ECCA channel detection process Or, when the data to be transmitted arrives, restarting the ECCA channel detection process, and determining whether to send the data to be transmitted according to the detection result of the restarted ECCA channel detection process.
  • the step of determining whether to send the data to be transmitted according to the detection result of the restarted ECCA channel detection process specifically includes: if the restarted ECCA channel detection process detects that the channel is idle, transmitting the data to be transmitted; if the ECCA is restarted When the channel detection process detects that the channel is busy, the data to be transmitted is not transmitted.
  • the method further includes:
  • Defer period process is performed after any one channel occupancy time ends, and before the ECCA channel detection process is turned on;
  • the defer period process is performed after the ECCA detection granularity.
  • FIG. 4 shows a schematic block diagram of a channel detecting apparatus according to an embodiment of the present invention.
  • a channel detecting apparatus 400 includes: The determining unit 402 and the processing unit 404.
  • the first determining unit 402 is configured to determine, by the sender, whether the channel occupation time is ended in the process of occupying the channel to transmit data, and the processing unit 404 is configured to: when the first determining unit 402 determines that the channel occupancy time ends , the ECCA channel detection process is turned on.
  • the end of the channel occupation time includes the following two situations: one is that the duration of occupying the channel reaches the maximum channel occupation time; and the other is that all data in the buffer is completely transmitted.
  • the method further includes: a second determining unit 406, configured to determine, at the end of the ECCA channel detecting process, whether there is data to be transmitted; the processing unit 404 is further configured to: When the second determining unit 406 determines that the data to be transmitted does not exist, the sender is controlled to enter an idle state, and when the data to be transmitted arrives, an ICCA channel detecting process is initiated; the channel detecting device 400 The method further includes: a first sending unit 408, configured to determine, according to the detection result of the ICCA channel detecting process, whether to send the data to be transmitted.
  • the technical solution clarifies the conditions for the sender to perform the ICCA process. Specifically, when the ECCA channel detection process ends, if the data to be transmitted still does not arrive, the sender can enter the idle state, and when there is data to be transmitted, the ICCA is executed. Channel detection process.
  • the step of determining whether to send data to be transmitted according to the detection result of the ICCA channel detection process specifically includes: if the ICCA channel detection process detects that the channel is idle, transmitting data to be transmitted; if the ICCA channel detection process detects that the channel is busy, The data to be transmitted is not sent.
  • the method further includes: a second sending unit 410, if the data to be transmitted already exists when the ECCA channel detecting process is started, or the data to be transmitted is detected in the ECCA channel Arriving before the end of the process, after the end of the ECCA channel detection process, whether to transmit the data to be transmitted is determined according to the detection result of the ECCA channel detection process.
  • determining whether to send the number to be transmitted according to the detection result of the ECCA channel detection process includes: if the ECCA channel detection process detects that the channel is idle, transmitting the data to be transmitted; if the ECCA channel detection process detects that the channel is busy, the data to be transmitted is not sent.
  • the processing unit 404 is further configured to: when the data to be transmitted arrives before the end of the ECCA channel detection process, at the end of the ECCA channel detection process or in the When the data to be transmitted arrives, the ECCA channel detection process is restarted; the channel detecting apparatus further includes: a third sending unit 412, configured to determine, according to the detection result of the restarted ECCA channel detecting process, whether to send the The data to be transmitted.
  • the step of determining whether to send the data to be transmitted according to the detection result of the restarted ECCA channel detection process specifically includes: if the restarted ECCA channel detection process detects that the channel is idle, transmitting the data to be transmitted; if the ECCA is restarted When the channel detection process detects that the channel is busy, the data to be transmitted is not transmitted.
  • processing unit 404 is further configured to:
  • Defer period process is performed after any one channel occupancy time ends, and before the ECCA channel detection process is turned on;
  • the defer period process is performed after the ECCA detection granularity.
  • Figure 5 shows a schematic block diagram of a base station in accordance with an embodiment of the present invention.
  • a base station 500 includes: a channel detecting apparatus 400 as shown in FIG.
  • Figure 6 shows a schematic block diagram of a terminal in accordance with an embodiment of the present invention.
  • a terminal 600 includes: a channel detecting apparatus 400 as shown in FIG.
  • the present invention mainly provides conditions for triggering an ECCA channel process and an ICCA channel detection trigger to ensure fairness of multiple transmission points when preempting an unlicensed spectrum. details as follows:
  • the ECCA channel detection process is turned on regardless of whether there is data in the buffer of the transmission point.
  • the sending point can enter the idle state. In the following time, if the data packet arrives, ICCA channel detection can be used.
  • the transmission point may not perform the ECCA process after the end of the primary channel occupation time, but may perform an initial process before the data is transmitted.
  • ICCA channel detection which will easily preempt the channel than the ECCA process, affecting the fairness of the transmission point when preempting the unlicensed spectrum. Therefore, the present invention proposes a new channel detection scheme, which can clarify the conditions for the sender to perform the ECCA process and the ICCA process, and effectively ensure the fairness of the sender when preempting the unlicensed spectrum.

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

Abstract

La présente invention concerne un procédé de détection de canal, et un appareil de détection de canal. Le procédé de détection de canal comprend les étapes consistant à : dans un processus dans lequel un expéditeur occupe un canal pour transmettre des données, déterminer si un temps d'occupation de canal expire ; et lorsqu'il est déterminé qu'un temps d'occupation de canal expire, débuter un processus de détection de canal ECCA. La solution technique de la présente invention permet de déterminer des conditions d'exécution d'un processus ECCA et d'un processus ICCA par un expéditeur de sorte à garantir l'équité lorsqu'un expéditeur préempte des spectres de fréquences sans licence.
PCT/CN2015/093485 2015-09-25 2015-10-31 Procédé de détection de canal, et appareil de détection de canal WO2017049720A1 (fr)

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Application Number Priority Date Filing Date Title
CN201510623238.4A CN105307179B (zh) 2015-09-25 2015-09-25 信道检测方法和信道检测装置
CN201510623238.4 2015-09-25

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CN107046731A (zh) * 2016-02-05 2017-08-15 索尼公司 无线通信系统中的电子设备和无线通信方法
CN112237021A (zh) 2018-06-11 2021-01-15 Oppo广东移动通信有限公司 免授权频谱上信道发送的方法、网络设备及终端设备

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Publication number Priority date Publication date Assignee Title
WO2014209919A1 (fr) * 2013-06-24 2014-12-31 Mediatek Singapore Pte. Ltd. Débit de réseau accru par amélioration du niveau de cca
CN104333873A (zh) * 2014-11-28 2015-02-04 东莞宇龙通信科技有限公司 信道检测方法及系统、具有基站功能的设备和终端

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CN104539405B (zh) * 2015-01-28 2018-02-13 深圳酷派技术有限公司 信道检测方法、信道检测系统、基站和终端
CN104717686B (zh) * 2015-03-31 2018-11-30 深圳酷派技术有限公司 一种未授权频段的信道检测方法及网元设备

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014209919A1 (fr) * 2013-06-24 2014-12-31 Mediatek Singapore Pte. Ltd. Débit de réseau accru par amélioration du niveau de cca
CN104333873A (zh) * 2014-11-28 2015-02-04 东莞宇龙通信科技有限公司 信道检测方法及系统、具有基站功能的设备和终端

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