WO2021031078A1 - Procédé et appareil de détermination d'une longueur d'une fenêtre de contention - Google Patents

Procédé et appareil de détermination d'une longueur d'une fenêtre de contention Download PDF

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Publication number
WO2021031078A1
WO2021031078A1 PCT/CN2019/101414 CN2019101414W WO2021031078A1 WO 2021031078 A1 WO2021031078 A1 WO 2021031078A1 CN 2019101414 W CN2019101414 W CN 2019101414W WO 2021031078 A1 WO2021031078 A1 WO 2021031078A1
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Prior art keywords
bandwidth part
contention window
length
target
sub
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PCT/CN2019/101414
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English (en)
Chinese (zh)
Inventor
朱亚军
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小米通讯技术有限公司
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Application filed by 小米通讯技术有限公司 filed Critical 小米通讯技术有限公司
Priority to PCT/CN2019/101414 priority Critical patent/WO2021031078A1/fr
Priority to CN201980001747.XA priority patent/CN110771250B/zh
Publication of WO2021031078A1 publication Critical patent/WO2021031078A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]

Definitions

  • the present disclosure relates to the field of communication technology, and in particular to a method for determining the length of a competition window, a device for determining the length of a competition window, an electronic device, and a computer-readable storage medium.
  • the communication between the terminal and the base station is no longer limited to the licensed frequency band, but can also communicate in the unlicensed frequency band.
  • the continuous emergence of new Internet applications such as the new generation of AR/VR and vehicle-to-vehicle communication has put forward higher requirements for wireless communication technology, driving the continuous evolution of wireless communication technology to meet the needs of applications.
  • cellular mobile communication technology is in the evolution stage of a new generation of technology.
  • An important feature of the new generation technology is to support flexible configuration of multiple business types.
  • different service types have different requirements for wireless communication technologies, such as eMBB (Enhanced Mobile Broadband), the main requirements of service types focus on large bandwidth and high speed; URLLC (Ultra Reliable & Low Latency Communication, ultra-high reliability) Ultra-low-latency communication)
  • the main requirements of the service type focus on higher reliability and low latency;
  • the main requirements of the mMTC Massive Machine Type of Communication, large-scale Internet of Things
  • a new generation of wireless communication systems requires a flexible and configurable design to support the transmission of multiple service types.
  • the unlicensed frequency band is not only occupied by the communication of the cellular system, and the communication of other systems may also occupy the unlicensed frequency band. Therefore, when the terminal and the base station in the cellular system need to communicate, if the unlicensed frequency band needs to be occupied, LBT (listen first) Later, the Listen Before Talk detection mechanism is used to detect whether the channel is idle, specifically to detect whether the channel of the unlicensed band is idle, and the unlicensed band can be occupied for communication when the channel of the unlicensed band is idle.
  • the embodiments of the present disclosure propose a method for determining a contention window length, a device for determining a contention window length, an electronic device, and a computer-readable storage medium to solve the difficulty in ensuring the accuracy of CWS and the difficulty in ensuring that the The bandwidth part carries on the technical question of the accuracy of LBT.
  • a method for determining the length of a contention window is proposed, which is suitable for the sending end, and the method includes:
  • the frequency domain information is an identifier of the bandwidth part.
  • the target bandwidth part includes one or more sub-bands to be detected, wherein the frequency domain information is an identifier of the sub-band.
  • the target bandwidth part includes a plurality of the sub-bands
  • the determining the target contention window length corresponding to the target bandwidth part according to the association relationship between the frequency domain information of the bandwidth part and the contention window length includes:
  • the target contention window length is determined according to multiple contention window lengths corresponding to the multiple sub-bands.
  • the determining the target contention window length according to multiple contention window lengths corresponding to the multiple sub-bands includes:
  • the multiple contention window lengths corresponding to the multiple sub-bands are weighted and summed to determine the target contention window length.
  • the target bandwidth part includes a plurality of the sub-bands
  • the determining the target contention window length corresponding to the target bandwidth part according to the association relationship between the frequency domain information of the bandwidth part and the contention window length includes:
  • the contention window length whose priority is the target priority is the target contention window length.
  • the multiple sub-bands are continuous, or at least two of the multiple sub-bands are not continuous.
  • a device for determining the length of a contention window which is suitable for a sending end, and the device includes:
  • a handover determining module configured to determine the target bandwidth part after the sending end switches the bandwidth part in the unlicensed frequency band
  • the window determination module is configured to determine the target contention window length corresponding to the target bandwidth part according to the correlation between the frequency domain information of the bandwidth part and the length of the contention window.
  • the frequency domain information is an identifier of the bandwidth part.
  • the target bandwidth part includes one or more sub-bands to be detected, wherein the frequency domain information is an identifier of the sub-band.
  • the target bandwidth part includes a plurality of the sub-bands
  • the window determination module is configured to determine each of the sub-bands according to the association relationship between the identifier of each sub-band in the bandwidth part and the length of the competition window.
  • the length of the contention window corresponding to the sub-band; and the length of the target contention window is determined according to the length of the multiple contention windows corresponding to the multiple sub-bands.
  • the window determination module is configured to weight and sum the lengths of multiple competition windows corresponding to the multiple sub-bands to determine the target competition window length.
  • the target bandwidth part includes a plurality of the sub-bands
  • the window determination module is configured to determine each of the sub-bands according to the association relationship between the identifier of each sub-band in the bandwidth part and the length of the competition window.
  • the length of the contention window corresponding to the sub-band; among multiple contention window lengths corresponding to the multiple sub-bands, the length of the contention window whose priority is the target priority is determined as the target contention window length.
  • the multiple sub-bands are continuous, or at least two of the multiple sub-bands are not continuous.
  • an electronic device including:
  • a memory for storing processor executable instructions
  • processor is configured to implement the method described in any of the foregoing embodiments.
  • a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the steps in the method described in any of the foregoing embodiments are implemented.
  • the target contention window length corresponding to the target bandwidth part can be determined according to the correlation between the frequency domain information of the bandwidth part and the contention window length. Because the communication conditions of different bandwidth parts are different, the correlation between the frequency domain information of the bandwidth part and the length of the competition window can be determined by the base station for different bandwidth parts, so that it can relatively accurately reflect the different communication conditions of each bandwidth part. According to the corresponding contention window length, determine the target contention window length corresponding to the target bandwidth part, so that the target contention window length can be applied to the target bandwidth part, which is beneficial to ensure the accuracy of LBT on the target bandwidth part according to the target contention window length , In order to have good communication quality after occupying the target bandwidth.
  • Figure 1A is a schematic diagram of a cat4 detection mechanism.
  • Fig. 1B is a schematic diagram of the relationship between the bandwidth part and the carrier.
  • Figure 1C is a schematic diagram of a switching bandwidth part.
  • Fig. 2 is a schematic flowchart showing a method for determining the length of a contention window according to an embodiment of the present disclosure.
  • Fig. 3 is a schematic diagram showing an association relationship between frequency domain information of a bandwidth part and a contention window length according to an embodiment of the present disclosure.
  • Fig. 4 is a schematic diagram showing another association relationship between frequency domain information of a bandwidth part and a contention window length according to an embodiment of the present disclosure.
  • Fig. 5 is a schematic flowchart of another method for determining the length of a contention window according to an embodiment of the present disclosure.
  • Fig. 6 is a schematic flowchart showing another method for determining the length of a contention window according to an embodiment of the present disclosure.
  • Fig. 7 is a schematic flowchart showing another method for determining the length of a contention window according to an embodiment of the present disclosure.
  • Fig. 8 is a schematic flowchart of yet another method for determining the length of a contention window according to an embodiment of the present disclosure.
  • Fig. 9A is a schematic flowchart showing another method for determining the length of a contention window according to an embodiment of the present disclosure.
  • Fig. 9B is a schematic diagram showing a switching bandwidth part according to an embodiment of the present disclosure.
  • Fig. 10 is a schematic flowchart showing another method for determining the length of a contention window according to an embodiment of the present disclosure.
  • Fig. 11 is a schematic block diagram showing a device for determining the length of a contention window according to an embodiment of the present disclosure.
  • Fig. 12 is a schematic block diagram showing another device for determining the length of a contention window according to an embodiment of the present disclosure.
  • Fig. 13 is a schematic block diagram showing a device for determining the length of a competition window according to an embodiment of the present disclosure.
  • Fig. 14 is a schematic block diagram showing an apparatus for determining the length of a competition window according to an embodiment of the present disclosure.
  • LAA licensed assisted access
  • LAA also introduces a mechanism that requires channel detection before data transmission. The sender needs to check whether the channel is idle when there is data to be sent, and only the channel is idle. After the state, the sender can send data.
  • the detection mechanisms for channels in unlicensed frequency bands include but are not limited to cat4 (random backoff LBT with non-fixed length contention window).
  • cat4 random backoff LBT with non-fixed length contention window
  • a count value N of the backoff counter can be uniformly and randomly generated from 0 to Contention Window Size (CWS, Contention Window Size), where N is between 0 and CWS.
  • CWS Contention Window Size
  • the counter value When CCA detects that the channel of the unlicensed band is idle, the counter value is reduced by 1. When CCA detects that the channel of the unlicensed band is busy, the counter value remains unchanged. When the counter value is 0, the unlicensed band is immediately occupied Channel.
  • the CWS used to detect the channel is 15, and the counter value is 7, then after the CCA detects that the channel in the unlicensed band is idle twice, 4 times CCA detects that the channel of the unlicensed band is busy, and then CCA detects that the channel of the unlicensed band is idle for 5 times, so that a total of 7 times CCA detects that the channel of the unlicensed band is idle, the counter value is reduced to 0, and the channel of the unlicensed band is occupied to receive Send data at the end.
  • the sending end can adjust the CWS while occupying the channel of the unlicensed frequency band, for example, increase the CWS to 31, the counter value is 20, then the sending end sends to the receiving end for the second time
  • the channel of the unlicensed frequency band is occupied to send data to the receiving end.
  • the contention window length CWS is variable, and the base station can be in the unlicensed frequency band in the reference subframe (the reference subframe is the first downlink transmission that the base station sends on the current carrier and is closest to the current moment. Subframes, and the base station can expect to receive the hybrid automatic repeat request fed back on this subframe) to send the physical downlink shared channel (Physical Downlink Shared CHannel, PDSCH for short) to the terminal, and the terminal can feed back the hybrid to the base station according to the structure of the received PDSCH Automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ for short), in which, if the terminal does not successfully receive the PDSCH, the HARQ status fed back is ACK; if the terminal successfully receives the PDSCH, the HARQ status fed back is NACK, and the base station can determine Refer to the proportion Z of NACK in the HARQ state of all PDSCHs in the reference subframe.
  • the reference subframe is the first downlink transmission that the base station sends on
  • Z is greater than the proportion threshold, it means that the terminal has received fewer PDSCHs successfully.
  • the base station communicates with the terminal on the unlicensed frequency band during the period corresponding to the reference subframe. If the communication quality is poor, the CWS can be adjusted to select a more appropriate time period to occupy the unlicensed frequency band to ensure better communication quality.
  • the bandwidth of the carrier has also increased.
  • the bandwidth of a carrier is divided into multiple bandwidth parts (Band Width Part, BWP) in related technologies, for example As shown in Fig. 1B, for a carrier with a bandwidth of 80 MHz, it contains 4 bandwidth parts, namely BWP1, BWP2, BWP3, and BWP4.
  • BWP Band Width Part
  • the bandwidth of each bandwidth part can be the same, for example, 20 MHz.
  • the sending end In the communication process between the terminal and the base station, as the sending end, generally only work on one bandwidth part. In some cases, the sending end needs to switch from one bandwidth part to another bandwidth part. For example, as shown in Figure 1C, the sending end The terminal switches from BWP1 to BWP2 to work.
  • the adjustment method of CWS in the related technology is only adjusted by the base station with reference to the HARQ status fed back by the terminal, the adjustment and adjustment of CWS will not be changed when the bandwidth part of the transmission segment is switched, but the communication conditions of different bandwidth parts are different.
  • the CWS is still adjusted according to the HARQ state fed back by the terminal in the bandwidth part before the switching, it is difficult to guarantee the accuracy of the CWS, and it is difficult to guarantee the accuracy of LBT on the bandwidth part based on the CWS.
  • Fig. 2 is a schematic flowchart showing a method for determining the length of a contention window according to an embodiment of the present disclosure.
  • the method for determining the length of the contention window shown in this embodiment can be applied to the sender.
  • the sender can occupy a licensed frequency band to communicate with the receiver, and it can also occupy an unlicensed frequency band to communicate with the receiver.
  • the sender and receiver can be based on 4G and 5G. And other communication protocol communication.
  • the sending end may be a base station or a terminal
  • the terminal may be an electronic device such as a mobile phone, a tablet computer, or a wearable device.
  • the method for determining the length of the competition window includes the following steps:
  • step S1 determine the target bandwidth part after the sending end switches the bandwidth part in the unlicensed frequency band
  • step S2 the target contention window length corresponding to the target bandwidth part is determined according to the correlation between the frequency domain information of the bandwidth part and the contention window length.
  • the unlicensed frequency band may include multiple bandwidth parts.
  • the unlicensed frequency band has a bandwidth of 80 MHz.
  • the unlicensed frequency band may be divided into 4 bandwidth parts BWPa, BWPb, BWPc, and BWPd, and each bandwidth part is in The frequency domain can correspond to 20 MHz.
  • the unlicensed frequency band can be divided into two bandwidth parts BWPx and BWPy, and each bandwidth part can correspond to 40 MHz in the frequency domain.
  • the sending end occupies an unlicensed frequency band to communicate, and it can communicate on a certain bandwidth part, and then switch to another bandwidth part to communicate.
  • the sending end is a base station, and the sending end can switch the bandwidth part.
  • the sending end is triggered by itself.
  • the sending end is a terminal, and the action of the sending end to switch the bandwidth part can be executed according to the signaling sent by the base station.
  • the base station can communicate with the terminal whether it is the transmitting end or the receiving end, and it is not limited to communicating with one terminal, but can communicate with multiple terminals, and it is not limited to communicating on a bandwidth part. Communicate with different terminals on multiple bandwidth parts.
  • the base station to send the PDSCH to the terminal in the reference subframe on different bandwidth parts, and receive the HARQ fed back by the terminal according to the reception result of the PDSCH, and then adjust the corresponding bandwidth part according to the proportion of NACK in the HARQ state According to the adjusted competition window length and the frequency domain information of the corresponding bandwidth part, the relationship between the frequency domain information of the bandwidth part and the competition window length is determined.
  • the frequency domain information of the bandwidth part may be an identifier of the bandwidth part, or may be an identifier of one or more sub-bands in the bandwidth part that need to be detected.
  • the storage method of the association relationship between the frequency domain information of the bandwidth part and the length of the competition window can be set as required, for example, it can be stored in the form of a table.
  • Fig. 3 is a schematic diagram showing an association relationship between frequency domain information of a bandwidth part and a contention window length according to an embodiment of the present disclosure.
  • the frequency domain information is the identifier of the bandwidth part as an example.
  • the identifiers of the 4 bandwidth parts are BWPa, BWPb, BWPc, BWPd respectively, then the frequency domain information of the bandwidth part corresponds to the length of the competition window
  • BWPa corresponds to the length of the competition window CWS1
  • BWPb corresponds to the length of the competition window CWS2
  • BWPc corresponds to the length of the competition window CWS3
  • BWPd corresponds to the length of the competition window CWS4.
  • Fig. 4 is a schematic diagram showing another association relationship between frequency domain information of a bandwidth part and a contention window length according to an embodiment of the present disclosure.
  • the bandwidth of the frequency band used by the transmitter to occupy and perform LBT is 20 MHz, and the bandwidth of the bandwidth part may be greater than 20 MHz. Therefore, a bandwidth part may include one or more sub-bands, and each sub-band serves as The transmitter performs the LBT frequency band in order to occupy.
  • the unlicensed band includes 4 sub-bands, and the four sub-bands are identified as sub-band 1, sub-band 2, sub-band 3, and sub-band 4. Different bandwidth parts may overlap, and different bandwidth parts may include the same sub-band. , Then the combination of the above 4 sub-bands can correspond to 15 bandwidth parts, as shown in Figure 4, from BWP1 to BWP15, the corresponding contention window lengths are CWP1 to CWP15.
  • the following example illustrates a way to adjust the length of the competition window.
  • Step A for a certain bandwidth part, the priority of the service communicating on the bandwidth part p ⁇ 1,2,3,4 ⁇ , the length of the contention window corresponding to the service with priority p is CW p (the lower the priority , The longer the contention window length), set CW p to the contention window length CW min,p corresponding to the business with the smallest priority;
  • Step B if Z is greater than the proportional threshold (for example, 80%), CW p can be increased to the length of the contention window corresponding to a higher priority service; if Z is less than or equal to the proportional threshold, return to step A.
  • the proportional threshold for example, 80%
  • CW p has been taken as the contention window length CW max,p corresponding to the business with the highest priority
  • adjusting CW p to the contention window length corresponding to the business with a higher priority is to keep CW max,p unchanged .
  • K which can be set as required, for example, an integer selected from 1 to 8.
  • the target contention window length corresponding to the target bandwidth part can be determined according to the correlation between the frequency domain information of the bandwidth part and the contention window length. Because the communication conditions of different bandwidth parts are different, the correlation between the frequency domain information of the bandwidth part and the length of the competition window can be determined by the base station for different bandwidth parts, so that it can relatively accurately reflect the different communication conditions of each bandwidth part. According to the corresponding contention window length, determine the target contention window length corresponding to the target bandwidth part, so that the target contention window length can be applied to the target bandwidth part, which is beneficial to ensure the accuracy of LBT on the target bandwidth part according to the target contention window length , In order to have good communication quality after occupying the target bandwidth.
  • the sending end is a base station.
  • the sending end may be a base station.
  • the sending end's action to switch the bandwidth part can be triggered by the sending end itself, and the correlation between the frequency domain information of the bandwidth part and the length of the competition window It can also be determined by the sender itself.
  • Fig. 5 is a schematic flowchart of another method for determining the length of a contention window according to an embodiment of the present disclosure. As shown in FIG. 5, the sending end is a terminal, and the method further includes:
  • step S3 the association relationship sent by the base station is received.
  • the sending end may be a terminal.
  • the sending end can switch the bandwidth part according to the signaling sent by the base station, and the frequency domain information of the bandwidth part is equal to the length of the contention window.
  • the association relationship also needs to be received from the base station. Among them, step S3 can be executed before step S2.
  • Fig. 6 is a schematic flowchart showing another method for determining the length of a contention window according to an embodiment of the present disclosure.
  • the association relationship sent by the receiving base station includes:
  • step S31 the association relationship sent by the base station is received periodically.
  • the base station may periodically adjust the length of the contention window for the bandwidth part, thereby periodically updating the association relationship between the frequency domain information of the bandwidth part and the length of the competition window, and send the updated association relationship to the terminal, correspondingly
  • the terminal may periodically receive the association relationship sent by the base station.
  • Fig. 7 is a schematic flowchart showing another method for determining the length of a contention window according to an embodiment of the present disclosure.
  • the association relationship sent by the receiving base station includes:
  • step S32 when receiving the signaling of the switching bandwidth part sent by the base station, the association relationship sent by the base station is received.
  • the terminal's action for switching the bandwidth part can be performed according to the signaling sent by the base station, and when receiving the signaling for switching the bandwidth part sent by the base station, it can simultaneously receive the association relationship sent by the base station, such as the The association relationship may be included in the signaling.
  • the frequency domain information is an identifier of the bandwidth part.
  • the target bandwidth part includes one or more sub-bands to be detected, wherein the frequency domain information is an identifier of the sub-band.
  • the frequency domain information of the bandwidth part may be the identifier of the bandwidth part, and in the case that the target bandwidth part includes one or more sub-bands to be detected, the frequency domain information of the bandwidth part may be the sub-band information Logo.
  • the bandwidth of the frequency band used by the transmitter to occupy and perform LBT is 20 MHz, and the bandwidth of the bandwidth part may be greater than 20 MHz. Therefore, a bandwidth part may include one or more required detections (such as LBT)
  • the sub-band also known as the LBT sub-band.
  • Fig. 8 is a schematic flowchart of yet another method for determining the length of a contention window according to an embodiment of the present disclosure.
  • the target bandwidth part includes a plurality of the sub-bands
  • the determining the target contention window length corresponding to the target bandwidth part according to the association relationship between the frequency domain information of the bandwidth part and the length of the contention window includes:
  • step S21 determine the length of the contention window corresponding to each sub-band according to the correlation between the identifier of each sub-band in the bandwidth part and the length of the contention window;
  • step S22 the target contention window length is determined according to multiple contention window lengths corresponding to multiple sub-bands.
  • each sub-band in the bandwidth part may correspond to a different contention window length.
  • the frequency domain information of the bandwidth part and the contention The correlation of the window length may specifically be the correlation between the identifier of the sub-band in the bandwidth part and the length of the competition window. Then, the target competition window length can be determined according to multiple competition window lengths corresponding to the multiple sub-bands.
  • Fig. 9A is a schematic flowchart showing another method for determining the length of a contention window according to an embodiment of the present disclosure. As shown in FIG. 9A, the determining the target contention window length according to the multiple contention window lengths corresponding to the multiple sub-bands includes:
  • step S221 the lengths of the multiple competition windows corresponding to the multiple sub-bands are weighted and summed to determine the length of the target competition window.
  • the lengths of multiple competition windows corresponding to multiple sub-bands may be weighted and summed to determine the target contention window length. Furthermore, the lengths of multiple competition windows corresponding to the multiple sub-bands may be averaged as The length of the target competition window.
  • Fig. 9B is a schematic diagram showing a switching bandwidth part according to an embodiment of the present disclosure.
  • the sender's switching bandwidth is switched from BWPx to BWPy.
  • BWPy includes two sub-bands, sub-band 2 and sub-band 3.
  • the length of the competition window corresponding to sub-band 2 is CWS2
  • the length of the competition window corresponding to sub-band 3 is CWS3, then the average value of CWS2 and CWS3 can be calculated as the target competition window length.
  • Fig. 10 is a schematic flowchart showing another method for determining the length of a contention window according to an embodiment of the present disclosure.
  • the target bandwidth part includes a plurality of the sub-bands
  • the determining the target contention window length corresponding to the target bandwidth part according to the association relationship between the frequency domain information of the bandwidth part and the contention window length includes:
  • step S23 determine the length of the competition window corresponding to each sub-band according to the correlation between the identifier of each sub-band in the bandwidth part and the length of the contention window;
  • step S24 among the multiple contention window lengths corresponding to the multiple sub-bands, it is determined that the length of the contention window whose priority is the target priority is the length of the target contention window.
  • each sub-band in the bandwidth part may correspond to a different contention window length.
  • the correlation of the window length can be specifically the correlation between the identifier of the sub-band in the bandwidth part and the length of the competition window.
  • different priorities can be set for different competition window lengths. Among them, the priority of the competition window length can be compared with the competition window length. The priority of the service used by the window length corresponds to the priority, and then among the multiple contention window lengths corresponding to the multiple sub-bands, the contention window length whose priority is the target priority is determined as the target contention window length.
  • the length of the contention window with the lowest priority can be determined as the length of the target contention window. Since the lower the priority of the contention window, the longer the length of the contention window, and the length of the contention window with the lowest priority, that is, the longest The length of the contention window is used as the length of the target contention window, which can ensure that the sender needs to detect that the target bandwidth part in the unlicensed frequency band is idle more times in the CCA to occupy the target bandwidth part. According to this, it is helpful to ensure the detection result of the target bandwidth part being idle. Accuracy, thereby ensuring the stability of communication that occupies the target bandwidth.
  • the priority of CWS2 is lower than that of CWS3, then CWS2 is longer than CWS3, and CWS2 can be selected as the target contention window length.
  • the multiple sub-bands are continuous, or at least two of the multiple sub-bands are not continuous.
  • the multiple sub-bands included in the bandwidth part may be continuous.
  • the width of the bandwidth part is 60 MHz, from A to A+60 MHz, and includes two sub-bands. If the two sub-bands are continuous, for example, two sub-bands may be It is A to A+20MHz and A+20MHz to A+40MHz. If the two sub-bands are not continuous, for example, the two sub-bands can be A to A+20MHz and A+40MHz to A+60MHz.
  • the detection mechanism of the unlicensed frequency band is not limited to cat4, and can also be based on cat1 (no LBT), cat2 (no random backoff LBT), cat3 (using fixed-length competition) Random back-off of window (LBT) detects unlicensed frequency bands.
  • the present disclosure also provides an embodiment of the device for determining the length of the contention window.
  • Fig. 11 is a schematic block diagram of a device for determining the length of a contention window according to an embodiment of the present disclosure.
  • the device for determining the length of the competition window shown in this embodiment can be applied to the sending end.
  • the sending end can occupy a licensed frequency band to communicate with the receiving end, and it can also occupy an unlicensed frequency band to communicate with the receiving end. And other communication protocol communication.
  • the sending end may be a base station or a terminal
  • the terminal may be an electronic device such as a mobile phone, a tablet computer, or a wearable device.
  • the device for determining the length of the contention window includes:
  • the switching determining module 1 is configured to determine the target bandwidth part after the sending end switches the bandwidth part in the unlicensed frequency band;
  • the window determination module 2 is configured to determine the target competition window length corresponding to the target bandwidth part according to the correlation between the frequency domain information of the bandwidth part and the length of the competition window.
  • the sending end is a base station.
  • Fig. 12 is a schematic block diagram showing another device for determining the length of a contention window according to an embodiment of the present disclosure.
  • the sending end is a terminal, and the apparatus further includes:
  • the relationship receiving module 3 is configured to receive the association relationship sent by the base station.
  • the relationship receiving module is configured to periodically receive the association relationship sent by the base station.
  • the relationship receiving module is configured to receive the association relationship sent by the base station when receiving the signaling of the switching bandwidth part sent by the base station.
  • the frequency domain information is an identifier of the bandwidth part.
  • the target bandwidth part includes one or more sub-bands to be detected, wherein the frequency domain information is an identifier of the sub-band.
  • the target bandwidth part includes a plurality of the sub-bands
  • the window determination module is configured to determine each of the sub-bands according to the association relationship between the identifier of each sub-band in the bandwidth part and the length of the competition window.
  • the length of the contention window corresponding to the sub-band; and the length of the target contention window is determined according to the length of the multiple contention windows corresponding to the multiple sub-bands.
  • the window determination module is configured to weight and sum the lengths of multiple competition windows corresponding to the multiple sub-bands to determine the target competition window length.
  • the target bandwidth part includes a plurality of the sub-bands
  • the window determination module is configured to determine each of the sub-bands according to the association relationship between the identifier of each sub-band in the bandwidth part and the length of the competition window.
  • the length of the contention window corresponding to the sub-band; among multiple contention window lengths corresponding to the multiple sub-bands, the length of the contention window whose priority is the target priority is determined as the target contention window length.
  • the multiple sub-bands are continuous, or at least two of the multiple sub-bands are not continuous.
  • the relevant part can refer to the part of the description of the method embodiment.
  • the device embodiments described above are merely illustrative.
  • the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, that is, they may be located in One place, or it can be distributed to multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the objectives of the solutions of the embodiments. Those of ordinary skill in the art can understand and implement it without creative work.
  • the embodiment of the present disclosure also proposes an electronic device, including:
  • a memory for storing processor executable instructions
  • processor is configured to implement the method described in any of the foregoing embodiments.
  • the embodiment of the present disclosure also proposes a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the steps in the method described in any of the foregoing embodiments are implemented.
  • FIG. 13 is a schematic block diagram of an apparatus 1300 for determining the length of a competition window according to an embodiment of the present disclosure.
  • the apparatus 1300 may be provided as a base station.
  • the device 1300 includes a processing component 1322, a wireless transmitting/receiving component 1324, an antenna component 1326, and a signal processing part specific to a wireless interface.
  • the processing component 1322 may further include one or more processors. One of the processors in the processing component 1322 may be configured to implement the method described in any of the foregoing embodiments.
  • Fig. 14 is a schematic block diagram showing a device 1400 for determining the length of a competition window according to an embodiment of the present disclosure.
  • the apparatus 1400 may be a terminal, such as a mobile phone, a computer, a digital broadcasting terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.
  • the device 1400 may include one or more of the following components: a processing component 1402, a memory 1404, a power supply component 1406, a multimedia component 1408, an audio component 1410, an input/output (I/O) interface 1412, a sensor component 1414, And the communication component 1416.
  • a processing component 1402 a memory 1404, a power supply component 1406, a multimedia component 1408, an audio component 1410, an input/output (I/O) interface 1412, a sensor component 1414, And the communication component 1416.
  • the processing component 1402 generally controls the overall operations of the device 1400, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations.
  • the processing component 1402 may include one or more processors 1420 to execute instructions to complete all or part of the steps of the foregoing method.
  • the processing component 1402 may include one or more modules to facilitate the interaction between the processing component 1402 and other components.
  • the processing component 1402 may include a multimedia module to facilitate the interaction between the multimedia component 1408 and the processing component 1402.
  • the memory 1404 is configured to store various types of data to support the operation of the device 1400. Examples of these data include instructions for any application or method operating on the device 1400, contact data, phone book data, messages, pictures, videos, etc.
  • the memory 1404 can be implemented by any type of volatile or non-volatile storage device or their combination, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Magnetic Disk or Optical Disk.
  • SRAM static random access memory
  • EEPROM electrically erasable programmable read-only memory
  • EPROM erasable Programmable Read Only Memory
  • PROM Programmable Read Only Memory
  • ROM Read Only Memory
  • Magnetic Memory Flash Memory
  • Magnetic Disk Magnetic Disk or Optical Disk.
  • the power supply component 1406 provides power for various components of the device 1400.
  • the power supply component 1406 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the device 1400.
  • the multimedia component 1408 includes a screen that provides an output interface between the device 1400 and the user.
  • the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user.
  • the touch panel includes one or more touch sensors to sense touch, sliding, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure related to the touch or slide operation.
  • the multimedia component 1408 includes a front camera and/or a rear camera. When the device 1400 is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have focal length and optical zoom capabilities.
  • the audio component 1410 is configured to output and/or input audio signals.
  • the audio component 1410 includes a microphone (MIC).
  • the microphone is configured to receive external audio signals.
  • the received audio signal may be further stored in the memory 1404 or transmitted via the communication component 1416.
  • the audio component 1410 further includes a speaker for outputting audio signals.
  • the I/O interface 1412 provides an interface between the processing component 1402 and a peripheral interface module.
  • the peripheral interface module may be a keyboard, a click wheel, a button, and the like. These buttons may include but are not limited to: home button, volume button, start button, and lock button.
  • the sensor component 1414 includes one or more sensors for providing the device 1400 with various aspects of status assessment.
  • the sensor component 1414 can detect the open/close state of the device 1400 and the relative positioning of components.
  • the component is the display and the keypad of the device 1400.
  • the sensor component 1414 can also detect the position change of the device 1400 or a component of the device 1400. , The presence or absence of contact between the user and the device 1400, the orientation or acceleration/deceleration of the device 1400, and the temperature change of the device 1400.
  • the sensor assembly 1414 may include a proximity sensor configured to detect the presence of nearby objects when there is no physical contact.
  • the sensor component 1414 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications.
  • the sensor component 1414 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor or a temperature sensor.
  • the communication component 1416 is configured to facilitate wired or wireless communication between the apparatus 1400 and other devices.
  • the device 1400 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, 4G LTE, 5G NR, or a combination thereof.
  • the communication component 1416 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel.
  • the communication component 1416 further includes a near field communication (NFC) module to facilitate short-range communication.
  • the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.
  • RFID radio frequency identification
  • IrDA infrared data association
  • UWB ultra-wideband
  • Bluetooth Bluetooth
  • the apparatus 1400 may be implemented by one or more application-specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable Implemented by a gate array (FPGA), controller, microcontroller, microprocessor, or other electronic components, and used to implement the method described in any of the foregoing embodiments.
  • ASIC application-specific integrated circuits
  • DSP digital signal processors
  • DSPD digital signal processing devices
  • PLD programmable logic devices
  • FPGA field programmable Implemented by a gate array (FPGA), controller, microcontroller, microprocessor, or other electronic components, and used to implement the method described in any of the foregoing embodiments.
  • non-transitory computer-readable storage medium including instructions, such as a memory 1404 including instructions, which may be executed by the processor 1420 of the device 1400 to complete the foregoing method.
  • the non-transitory computer-readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

Landscapes

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

Abstract

Les modes de réalisation concernent un procédé de détermination d'une longueur d'une fenêtre de contention. Le procédé comprend les étapes consistant à : déterminer une partie de bande passante cible après qu'une extrémité d'envoi commute une partie de bande passante dans une bande de fréquences sans licence ; et déterminer une longueur d'une fenêtre de contention cible correspondant à la partie de bande passante cible en fonction d'une relation d'association entre des informations de domaine fréquentiel de la partie de bande passante et une longueur d'une fenêtre de contention. D'après les modes de réalisation, les conditions de communication de différentes parties de bande passante sont différentes et la relation d'association entre les informations de domaine fréquentiel de la partie de bande passante et la longueur de la fenêtre de contention peut être déterminée respectivement par une station de base par rapport à différentes parties de bande passante. La longueur de la fenêtre de contention correspondant à chaque partie de bande passante dans différentes conditions de communication peut donc être réfléchie d'une manière relativement précise. La longueur d'une fenêtre de contention cible correspondant à la partie de bande passante cible est déterminée en conséquence, ce qui permet à la longueur de la fenêtre de contention cible d'être appropriée pour la partie de bande passante cible. La précision de l'exécution d'une LBT sur la partie de bande passante cible en fonction de la longueur de la fenêtre de contention cible peut donc être assurée. De plus, une qualité de communication satisfaisante peut être obtenue après l'occupation de la partie de bande passante cible.
PCT/CN2019/101414 2019-08-19 2019-08-19 Procédé et appareil de détermination d'une longueur d'une fenêtre de contention WO2021031078A1 (fr)

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