CN110771250A - Method and device for determining length of contention window - Google Patents
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Abstract
The embodiment of the disclosure relates to a method for determining a length of a contention window, comprising: determining a target bandwidth part after a sending end switches the bandwidth part in an unauthorized frequency band; and determining the length of a target competition window corresponding to the target bandwidth part according to the incidence relation between the frequency domain information of the bandwidth part and the length of the competition window. According to the embodiment of the disclosure, because different bandwidth parts have different communication conditions, and the association relationship between the frequency domain information of the bandwidth parts and the length of the contention window may be respectively determined by the base station for the different bandwidth parts, so that the length of the contention window corresponding to each bandwidth part under different communication conditions can be relatively accurately reflected, and the length of the target contention window corresponding to the target bandwidth part is determined accordingly, so that the length of the target contention window can be suitable for the target bandwidth part, which is beneficial to ensuring the accuracy of performing LBT on the target bandwidth part according to the length of the target contention window, so that the target bandwidth part can have good communication quality after being occupied.
Description
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a contention window length determination method, a contention window length determination apparatus, an electronic device, and a computer-readable storage medium.
Background
With the development of communication technology, communication between a terminal and a base station is not limited to a licensed frequency band, but may also be in an unlicensed frequency band. The continuous emergence of new internet applications such as new generation of AR/VR, vehicle-to-vehicle communication, etc. puts higher demands on wireless communication technology, driving the continuous evolution of wireless communication technology to meet the demands of applications.
Currently, cellular mobile communication technology is in the evolution stage of new generation technology. An important feature of the new generation of technology is to support flexible configuration of multiple service types. Because different service types have different requirements for wireless communication technology, for example, the main requirements of the service type of the Enhanced Mobile Broadband (eMBB) are mainly focused on the aspects of large bandwidth, high speed and the like; the main requirements of URLLC (Ultra Reliable & Low Latency Communication) service type are focused on higher reliability and Low Latency; the major requirements of mtc (Massive Machine Type of Communication) service types focus on large connection numbers. New generation wireless communication systems therefore require flexible and configurable designs to support the transmission of multiple traffic types.
As the demand for services is driven, the demand for services cannot be satisfied only by using licensed spectrum, and therefore, it is considered to deploy a mobile network on an unlicensed frequency band. There may be other systems such as WiFi system on the unlicensed frequency band, and how to ensure fair resource sharing of different communication systems on the unlicensed frequency band needs to be studied
However, since the unlicensed frequency band is not occupied by only the communication of the cellular system, and the communication of other systems may also occupy the unlicensed frequency band, when the terminal in the cellular system needs to communicate with the base station, if the unlicensed frequency band needs to be occupied, an LBT (Listen Before Talk) detection mechanism may be used to detect whether the channel is idle, specifically, whether the channel of the unlicensed frequency band is idle is detected, and when the channel of the unlicensed frequency band is idle, the unlicensed frequency band may be occupied for communication.
Disclosure of Invention
In view of the above, embodiments of the present disclosure provide a contention window length determination method, a contention window length determination apparatus, an electronic device, and a computer-readable storage medium to solve the technical problems in the related art that it is difficult to ensure the accuracy of a CWS and to ensure the accuracy of LBT on a bandwidth part according to the CWS.
According to a first aspect of the embodiments of the present disclosure, a method for determining a contention window length is provided, which is applied to a sending end, where the method includes:
determining a target bandwidth part after the bandwidth part is switched in an unauthorized frequency band by the sending end;
and determining the length of a target competition window corresponding to the target bandwidth part according to the incidence relation between the frequency domain information of the bandwidth part and the length of the competition window.
Optionally, the frequency domain information is an identifier of the bandwidth part.
Optionally, the target bandwidth part includes one or more sub-bands to be detected, where the frequency domain information is an identifier of the sub-band.
Optionally, the target bandwidth part includes a plurality of the sub-bands, and the determining, according to the association between the frequency domain information of the bandwidth part and the length of the contention window, the length of the target contention window corresponding to the target bandwidth part includes:
determining the length of a contention window corresponding to each sub-frequency band according to the association relationship between the identifier of each sub-frequency band in the bandwidth part and the length of the contention window;
and determining the length of the target contention window according to a plurality of contention window lengths corresponding to the plurality of sub-bands.
Optionally, the determining a target contention window length according to a plurality of contention window lengths corresponding to the plurality of sub-bands includes:
and weighting and summing a plurality of competition window lengths corresponding to the plurality of sub-bands to determine the target competition window length.
Optionally, the target bandwidth part includes a plurality of the sub-bands, and the determining, according to the association between the frequency domain information of the bandwidth part and the length of the contention window, the length of the target contention window corresponding to the target bandwidth part includes:
determining the length of a contention window corresponding to each sub-frequency band according to the association relationship between the identifier of each sub-frequency band in the bandwidth part and the length of the contention window;
and determining the length of a competition window with the priority as the target priority as the length of the target competition window in a plurality of lengths of competition windows corresponding to the sub-frequency bands.
Optionally, the multiple frequency sub-bands are continuous, or at least two frequency sub-bands of the multiple frequency sub-bands are discontinuous.
According to a second aspect of the embodiments of the present disclosure, a contention window length determining apparatus is provided, which is suitable for a sending end, and the apparatus includes:
a switching determination module configured to determine a target bandwidth part after the sending end switches the bandwidth part in an unlicensed frequency band;
and the window determining module is configured to determine a 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.
Optionally, the frequency domain information is an identifier of the bandwidth part.
Optionally, the target bandwidth part includes one or more sub-bands to be detected, where the frequency domain information is an identifier of the sub-band.
Optionally, the target bandwidth part includes a plurality of sub-bands, and the window determination module is configured to determine, according to an association relationship between an identifier of each sub-band in the bandwidth part and a length of a contention window, a length of the contention window corresponding to each sub-band; and determining the length of the target contention window according to a plurality of contention window lengths corresponding to the plurality of sub-bands.
Optionally, the window determining module is configured to weight and sum a plurality of contention window lengths corresponding to the plurality of frequency sub-bands to determine the target contention window length.
Optionally, the target bandwidth part includes a plurality of sub-bands, and the window determination module is configured to determine, according to an association relationship between an identifier of each sub-band in the bandwidth part and a length of a contention window, a length of the contention window corresponding to each sub-band; and determining the length of a competition window with the priority as the target priority as the length of the target competition window in a plurality of lengths of competition windows corresponding to the sub-frequency bands.
Optionally, the multiple frequency sub-bands are continuous, or at least two frequency sub-bands of the multiple frequency sub-bands are discontinuous.
According to a third aspect of the embodiments of the present disclosure, an electronic device is provided, including:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to implement the method of any of the above embodiments.
According to a fourth aspect of the embodiments of the present disclosure, a computer-readable storage medium is proposed, on which a computer program is stored, which when executed by a processor implements the steps in the method according to any of the embodiments described above.
According to the embodiment of the disclosure, after the sending end is switched to the target bandwidth part, the target contention window length corresponding to the target bandwidth part can be determined according to the association relationship between the frequency domain information of the bandwidth part and the contention window length. Because the communication conditions of different bandwidth parts are different, and the association relationship between the frequency domain information of the bandwidth parts and the length of the contention window can be respectively determined by the base station aiming at the different bandwidth parts, the length of the contention window corresponding to each bandwidth part under different communication conditions can be relatively accurately reflected, and the length of the target contention window corresponding to the target bandwidth part is determined according to the length, so that the length of the target contention window can be suitable for the target bandwidth part, the accuracy of LBT (local binary transmission based) on the target contention window length can be favorably ensured, and the communication quality can be good after the target bandwidth part is occupied.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
FIG. 1A is a schematic diagram of a cat4 detection mechanism.
Fig. 1B is a schematic diagram of the relationship between a bandwidth portion and a carrier.
Fig. 1C is a schematic diagram of a handover bandwidth portion.
Fig. 2 is a schematic flow chart diagram illustrating a contention window length determination method according to an embodiment of the present disclosure.
Fig. 3 is a schematic diagram illustrating a correlation between frequency domain information of a bandwidth part and a contention window length according to an embodiment of the disclosure.
Fig. 4 is a schematic diagram illustrating another association relationship between frequency domain information of a bandwidth part and a contention window length according to an embodiment of the disclosure.
Fig. 5 is a schematic flow chart diagram illustrating another contention window length determination method according to an embodiment of the present disclosure.
Fig. 6 is a schematic flow chart diagram illustrating yet another contention window length determination method according to an embodiment of the present disclosure.
Fig. 7 is a schematic flow chart diagram illustrating yet another contention window length determination method according to an embodiment of the present disclosure.
Fig. 8 is a schematic flow chart diagram illustrating yet another contention window length determination method according to an embodiment of the present disclosure.
Fig. 9A is a schematic flow chart diagram illustrating yet another contention window length determination method according to an embodiment of the present disclosure.
Fig. 9B is a schematic diagram illustrating a handover bandwidth portion, according to an embodiment of the present disclosure.
Fig. 10 is a schematic flow chart diagram illustrating yet another contention window length determination method according to an embodiment of the present disclosure.
Fig. 11 is a schematic block diagram illustrating a contention window length determination apparatus according to an embodiment of the present disclosure.
Fig. 12 is a schematic block diagram illustrating another contention window length determination apparatus according to an embodiment of the present disclosure.
Fig. 13 is a schematic block diagram illustrating an apparatus for contention window length determination according to an embodiment of the present disclosure.
Fig. 14 is a schematic block diagram illustrating an apparatus for contention window length determination according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
In the related art, in the development of a wireless communication system, for an unlicensed spectrum, in 3GPP, it is proposed to use an unlicensed band by an laa (license associated access) mechanism. That is, the use of the unlicensed frequency band is facilitated by the licensed frequency band. In order to ensure coexistence with other systems such as WiFi on an unlicensed frequency band, a mechanism that channel detection is required before data transmission is also introduced in LAA, a transmitting end needs to detect whether a channel is idle when data needs to be transmitted, and the transmitting end can transmit the data only after the channel is in an idle state.
At present, there are various mechanisms for detecting channels, including but not limited to cat4 (random back-off LBT with non-fixed length contention window). As shown in fig. 1A, based on the cat4 detection mechanism, a back-off counter N can be generated uniformly and randomly from 0 to the Contention Window length (CWS), where N is between 0 and CWS.
When the CCA detects that the channel of the unlicensed frequency band is idle, the counting value of the counter is reduced by 1, when the CCA detects that the channel of the unlicensed frequency band is busy, the counting value of the counter is unchanged, and when the counting value of the counter is 0, the channel of the unlicensed frequency band is immediately occupied.
For example, in fig. 1A, when a sending end sends data to a receiving end for the first time, a CWS used for detecting a channel is 15, and a count value of a counter is 7, then after 2 times of CCA detects that a channel in an unlicensed frequency band is idle, 4 times of CCA detects that the channel in the unlicensed frequency band is busy, and then 5 times of CCA detects that the channel in the unlicensed frequency band is idle, so that 7 times of CCA detects that the channel in the unlicensed frequency band is idle, and the count value of the counter is reduced to 0, and the channel occupying the unlicensed frequency band sends data to the receiving end.
However, the receiving end fails to receive the data, the transmitting end may adjust the CWS during the period of occupying the channel of the unlicensed frequency band, for example, the CWS is increased to 31, and the count value of the counter is 20, so that when the transmitting end transmits data to the receiving end for the second time, after 20 times of CCA detects that the channel of the unlicensed frequency band is idle, the channel occupying the unlicensed frequency band transmits data to the receiving end.
In the related art, the contention window length CWS is variable, the base station may transmit a Physical Downlink Shared CHannel (PDSCH) to the terminal in a reference subframe (the reference subframe is a first subframe in a Downlink transmission that is transmitted by the base station on a current carrier and is closest to a current time, and the base station may expect to receive a Hybrid Automatic Repeat reQuest fed back on the subframe), and the terminal may feed back a Hybrid Automatic Repeat reQuest (HARQ) to the base station according to a structure of receiving the PDSCH, where if the terminal does not successfully receive the PDSCH, a status of the HARQ fed back is ACK, and if the terminal successfully receives the PDSCH, a status of the HARQ fed back is NACK, the base station may determine a ratio Z of NACKs in HARQ statuses of all PDSCHs in the reference subframe, and if Z is greater than a ratio threshold, the number of times that the terminal successfully receives the PDSCH is small, and the base station has poor communication quality with the terminal on the unauthorized frequency band in the time period corresponding to the reference subframe, and then the CWS can be adjusted so as to select a more appropriate time period to occupy the unauthorized frequency band for communication and ensure better communication quality.
In addition, as the communication technology develops, the BandWidth of the carrier also increases, and in order to clearly determine which Part of the BandWidth of the carrier needs to be used, in the related art, the BandWidth of one carrier is divided into a plurality of BandWidth parts (BWPs), for example, as shown in fig. 1B, for a carrier with a BandWidth of 80MHz, which includes 4 BandWidth parts, BWP1, BWP2, BWP3 and BWP4, the BandWidth of each BandWidth Part may be the same, for example, 20 MHz.
During communication, the terminal and the base station generally operate on only one bandwidth part as the transmitting end, and in some cases, the transmitting end needs to switch from one bandwidth part to another bandwidth part, for example, as shown in fig. 1C, the transmitting end switches from BWP1 to BWP 2.
Because the CWS adjustment method in the related art is only adjusted by referring to the HARQ status fed back by the terminal by the base station, the adjustment of the CWS is not changed when the bandwidth part is switched in the transmission segment, but the communication conditions of different bandwidth parts are different, and if the CWS is still adjusted according to the HARQ status fed back by the terminal in the bandwidth part before switching after the bandwidth part is switched, it is difficult to ensure the accuracy of the CWS, and it is also difficult to ensure the accuracy of LBT performed on the bandwidth part according to the CWS.
Fig. 2 is a schematic flow chart diagram illustrating a contention window length determination method according to an embodiment of the present disclosure. The method for determining the length of the contention window shown in this embodiment may be applied to a transmitting end, where the transmitting end may occupy an authorized frequency band to communicate with a receiving end, and may also occupy an unauthorized frequency band to communicate with the receiving end, for example, the transmitting end and the receiving end may communicate based on communication protocols such as 4G and 5G.
The sending end can be a base station or a terminal, and the terminal can be an electronic device such as a mobile phone, a tablet computer, a wearable device and the like. As shown in fig. 2, the contention window length determining method includes the following steps:
in step S1, determining a target bandwidth part after the sender switches the bandwidth part in the unlicensed frequency band;
in step S2, a target contention window length corresponding to the target bandwidth part is determined according to the association relationship between the frequency domain information of the bandwidth part and the contention window length.
In one embodiment, the unlicensed band may include multiple bandwidth portions, for example, the bandwidth of the unlicensed band is 80MHz, for example, the unlicensed band may be divided into 4 bandwidth portions BWPa, BWPb, BWPc, BWPd, each of which may correspond to 20MHz in the frequency domain, for example, the unlicensed band may be divided into 2 bandwidth portions BWPx and BWPy, each of which may correspond to 40MHz in the frequency domain.
In an embodiment, the sending end occupies an unlicensed frequency band for communication, and may perform communication on a certain bandwidth portion, and then switch to another bandwidth portion for communication, for example, the sending end is a base station, and an action of switching the bandwidth portion by the sending end may be triggered by the sending end itself, for example, the sending end is a terminal, and the action of switching the bandwidth portion by the sending end may be performed according to a signaling sent by the base station.
In one embodiment, a base station, whether acting as a transmitting end or a receiving end, may communicate with a terminal and is not limited to communicating with one terminal, but may communicate with multiple terminals and is also not limited to communicating over one bandwidth segment and may communicate with different terminals over multiple bandwidth segments.
The base station can send the PDSCH to the terminal in the reference subframe on different bandwidth parts, receive the HARQ fed back by the terminal according to the receiving result of the PDSCH, adjust the length of a contention window corresponding to each bandwidth part according to the NACK proportion in the HARQ state, and further determine the association relation between the frequency domain information of the bandwidth part and the length of the contention window according to the adjusted length of the contention window and the frequency domain information of the corresponding bandwidth part.
The frequency domain information of the bandwidth part may be an identifier of the bandwidth part, or an identifier of one or more sub-bands to be detected in the bandwidth part. In addition, the storage manner of the association relationship between the frequency domain information of the bandwidth part and the length of the contention window may be set as required, and may be stored in a table form, for example.
Fig. 3 is a schematic diagram illustrating a correlation between frequency domain information of a bandwidth part and a contention window length according to an embodiment of the disclosure.
Taking the unlicensed band including 4 bandwidth portions, the frequency domain information being the identifier of the bandwidth portion as an example, and the identifiers of the 4 bandwidth portions being BWPa, BWPb, BWPc, BWPd, respectively, the correspondence relationship between the frequency domain information of the bandwidth portion and the contention window length can be, as shown in fig. 3, BWPa corresponds to the contention window length CWS1, BWPb corresponds to the contention window length CWS2, BWPc corresponds to the contention window length CWS3, and BWPd corresponds to the contention window length CWS 4.
Fig. 4 is a schematic diagram illustrating another association relationship between frequency domain information of a bandwidth part and a contention window length according to an embodiment of the disclosure.
In an embodiment, generally, a bandwidth of a frequency band where a transmitting end performs LBT for occupying is 20MHz, and a bandwidth of a bandwidth portion may be greater than 20MHz, so that one bandwidth portion may include one or more sub-bands, and each sub-band is used as a frequency band where the transmitting end performs LBT for occupying.
The unlicensed band includes 4 sub-bands, the identifiers of the 4 sub-bands are 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, so that the combination of the 4 sub-bands may correspond to 15 bandwidth parts, as shown in fig. 4, from BWP1 to BWP15, the lengths of the contention windows corresponding to the sub-bands are CWP1 to CWP15, respectively.
However, as to how to adjust the contention window length, a way of adjusting the contention window length is explained below by way of example.
Step A, aiming at a certain bandwidth part, the priority p E of the service communicated on the bandwidth part is {1,2,3,4}, and the length of a contention window corresponding to the service with the priority p is CWp(the lower the priority, the longer the contention window length), CWpContention window length CW corresponding to traffic set to minimum prioritymin,p；
Step B, if Z is greater than a scaling threshold (e.g., 80%), CW may be dividedpIncreasing the length of the contention window corresponding to the service with one higher priority(ii) a And if Z is less than or equal to the proportional threshold, returning to the step A.
In addition, if CWpThe contention window length CW corresponding to the service whose priority has been taken to be the maximummax,pThen adjust CWpThe length of the contention window corresponding to the traffic of a higher priority is to keep the CWmax,pAnd is not changed. And if CW is adjusted K (which may be set as desired, and may be an integer selected from 1 to 8, for example) times in successionpAll are maintaining CWmax,pNot changing, then CWpIs set to CWmin,p。
According to the embodiment of the disclosure, after the sending end is switched to the target bandwidth part, the target contention window length corresponding to the target bandwidth part can be determined according to the association relationship between the frequency domain information of the bandwidth part and the contention window length. Because the communication conditions of different bandwidth parts are different, and the association relationship between the frequency domain information of the bandwidth parts and the length of the contention window can be respectively determined by the base station aiming at the different bandwidth parts, the length of the contention window corresponding to each bandwidth part under different communication conditions can be relatively accurately reflected, and the length of the target contention window corresponding to the target bandwidth part is determined according to the length, so that the length of the target contention window can be suitable for the target bandwidth part, the accuracy of LBT (local binary transmission based) on the target contention window length can be favorably ensured, and the communication quality can be good after the target bandwidth part is occupied.
Optionally, the sending end is a base station.
In an embodiment, the sending end may be a base station, and in the case that the sending end is a base station, the action of the sending end for switching the bandwidth part may be triggered by the sending end, and the association relationship between the frequency domain information of the bandwidth part and the length of the contention window may also be determined by the sending end.
Fig. 5 is a schematic flow chart diagram illustrating another contention window length determination method according to an embodiment of the present disclosure. As shown in fig. 5, the sending end is a terminal, and the method further includes:
in step S3, the association relation transmitted by the base station is received.
In an embodiment, the sending end may be a terminal, and in a case that the sending end is the terminal, an action of switching the bandwidth part by the sending end may be performed according to a signaling sent by the base station, and an association relationship between frequency domain information of the bandwidth part and a length of the contention window also needs to be received from the base station. Wherein, step S3 may be performed before step S2.
Fig. 6 is a schematic flow chart diagram illustrating yet another contention window length determination method according to an embodiment of the present disclosure. As shown in fig. 6, the association relationship sent by the receiving base station includes:
in step S31, the association sent by the base station is periodically received.
In one embodiment, the base station may periodically adjust the length of the contention window for the bandwidth part, so as to periodically update the association relationship between the frequency domain information of the bandwidth part and the length of the contention window, and send the updated association relationship to the terminal, and accordingly, the terminal may periodically receive the association relationship sent by the base station.
Fig. 7 is a schematic flow chart diagram illustrating yet another contention window length determination method according to an embodiment of the present disclosure. As shown in fig. 7, the association relationship sent by the receiving base station includes:
in step S32, when receiving the signaling of the handover bandwidth part sent by the base station, the association relation sent by the base station is received.
In an embodiment, the action of switching the bandwidth part by the terminal may be performed according to signaling sent by the base station, and when receiving the signaling sent by the base station for switching the bandwidth part, the association relation sent by the base station may be received at the same time, for example, the association relation may be included in the signaling.
Optionally, the frequency domain information is an identifier of the bandwidth part.
Optionally, the target bandwidth part includes one or more sub-bands to be detected, where the frequency domain information is an identifier of the sub-band.
In one embodiment, the frequency domain information of the bandwidth part may be an identification 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 an identification of the sub-bands.
In one embodiment, the bandwidth of the frequency band occupied by the transmitting end for performing LBT is generally 20MHz, and the bandwidth of the bandwidth part may be greater than 20MHz, so that one bandwidth part may include one or more sub-bands (also referred to as LBT sub-bands) to be detected (e.g., LBT).
Fig. 8 is a schematic flow chart diagram illustrating yet another contention window length determination method according to an embodiment of the present disclosure. As shown in fig. 8, the target bandwidth part includes a plurality of the sub-bands, and the determining, according to the association between the frequency domain information of the bandwidth part and the length of the contention window, the length of the target contention window corresponding to the target bandwidth part includes:
in step S21, determining a contention window length corresponding to each sub-band according to an association relationship between an identifier of each sub-band in the bandwidth part and the contention window length;
in step S22, the target contention window length is determined according to a plurality of contention window lengths corresponding to the plurality of sub-bands.
In an embodiment, in a case that the target bandwidth part includes a plurality of the sub-bands, each of the sub-bands in the bandwidth part may correspond to a different contention window length, and in this case, an association relationship between frequency domain information of the bandwidth part and the contention window length, specifically, an association relationship between an identifier of the sub-band in the bandwidth part and the contention window length, may determine the target contention window length according to a plurality of contention window lengths corresponding to the plurality of sub-bands.
Fig. 9A is a schematic flow chart diagram illustrating yet another contention window length determination method according to an embodiment of the present disclosure. As shown in fig. 9A, the determining a target contention window length according to a plurality of contention window lengths corresponding to a plurality of the sub-bands includes:
in step S221, a plurality of contention window lengths corresponding to the plurality of sub-bands are weighted and summed to determine the target contention window length.
In an embodiment, the lengths of the contention windows corresponding to the sub-bands may be weighted and then summed to determine the length of the target contention window, and further, the length of the target contention window may be averaged to obtain the length of the target contention window.
Fig. 9B is a schematic diagram illustrating a handover bandwidth portion, according to an embodiment of the present disclosure.
For example, as shown in fig. 9B, the sender switches the bandwidth part from BWPx to BWPy, where BWPy includes two sub-bands, sub-band 2 and sub-band 3, the contention window length corresponding to sub-band 2 is CWS2, and the contention window length corresponding to sub-band 3 is CWS3, so that the average value of CWS2 and CWS3 may be calculated as the target contention window length.
Fig. 10 is a schematic flow chart diagram illustrating yet another contention window length determination method according to an embodiment of the present disclosure. As shown in fig. 10, the target bandwidth part includes a plurality of the sub-bands, and the determining, according to the association between the frequency domain information of the bandwidth part and the length of the contention window, the length of the target contention window corresponding to the target bandwidth part includes:
in step S23, determining a contention window length corresponding to each sub-band according to an association relationship between an identifier of each sub-band in the bandwidth part and the contention window length;
in step S24, among a plurality of contention window lengths corresponding to the plurality of sub-bands, a contention window length whose priority is a target priority is determined as the target contention window length.
In an embodiment, in a case that the target bandwidth part includes a plurality of the sub-bands, each sub-band in the bandwidth part may correspond to a different contention window length, and in this case, an association relationship between frequency domain information of the bandwidth part and the contention window length, specifically, an association relationship between an identifier of the sub-band in the bandwidth part and the contention window length, may set different priorities for the different contention window lengths, where a priority of the contention window length may correspond to a priority of a service used by the contention window length, and in a plurality of contention window lengths corresponding to the plurality of sub-bands, the contention window length whose priority is the target priority is determined to be the target contention window length.
In an embodiment, the length of the contention window with the lowest priority may be determined as the length of the target contention window, and as the lower the priority of the contention window is, the longer the length of the contention window is, the length of the contention window with the lowest priority is selected, that is, the longest length of the contention window is used as the length of the target contention window, so that it may be ensured that the transmitting end needs to detect that the target bandwidth portion in the unlicensed frequency band is idle for more CCA to occupy the target bandwidth portion, thereby being beneficial to ensuring the accuracy of the detection result that the target bandwidth portion is idle, and further ensuring the stability of communication occupying the target bandwidth portion.
For example, in fig. 9B, in BWPy after the switch, CWS2 has a lower priority than CWS3, CWS2 is longer than CWS3, CWS2 can be selected as the target contention window length.
Optionally, the multiple frequency sub-bands are continuous, or at least two frequency sub-bands of the multiple frequency sub-bands are discontinuous.
In one embodiment, the plurality of sub-bands included in the bandwidth part may be continuous, for example, the width of the bandwidth part is 60MHz, from a to a +60MHz, and includes two sub-bands, if the two sub-bands are continuous, for example, the two sub-bands may be a to a +20MHz and a +20MHz to a +40MHz, and if the two sub-bands are discontinuous, for example, the two sub-bands may be a to a +20MHz and a +40MHz to a +60 MHz.
It should be noted that, in the sender described in this embodiment, the detection mechanism for the unlicensed frequency band is not limited to cat4, and the detection mechanism for the unlicensed frequency band may also be based on cat1 (without LBT), cat2 (without random backoff LBT), and cat3 (random backoff LBT using a fixed length contention window).
Corresponding to the foregoing embodiments of the contention window length determination method, the present disclosure also provides embodiments of a contention window length determination apparatus.
Fig. 11 is a schematic block diagram illustrating a contention window length determination apparatus according to an embodiment of the present disclosure. The contention window length determining apparatus shown in this embodiment may be applicable to a transmitting end, where the transmitting end may occupy an authorized frequency band to communicate with a receiving end, and may also occupy an unauthorized frequency band to communicate with the receiving end, for example, the transmitting end and the receiving end may communicate based on communication protocols such as 4G and 5G.
The sending end can be a base station or a terminal, and the terminal can be an electronic device such as a mobile phone, a tablet computer, a wearable device and the like. As shown in fig. 11, the contention window length determining apparatus includes:
a switching determining module 1 configured to determine a target bandwidth part after the sending end switches the bandwidth part in the unlicensed frequency band;
and the window determining module 2 is configured to determine a 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.
Optionally, the sending end is a base station.
Fig. 12 is a schematic block diagram illustrating another contention window length determination apparatus according to an embodiment of the present disclosure. As shown in fig. 12, the sending end is a terminal, and the apparatus further includes:
a relation receiving module 3 configured to receive the association relation sent by the base station.
Optionally, the relationship receiving module is configured to periodically receive the association relationship sent by the base station.
Optionally, the relationship receiving module is configured to receive the association relationship sent by the base station when receiving a signaling of switching a bandwidth part sent by the base station.
Optionally, the frequency domain information is an identifier of the bandwidth part.
Optionally, the target bandwidth part includes one or more sub-bands to be detected, where the frequency domain information is an identifier of the sub-band.
Optionally, the target bandwidth part includes a plurality of sub-bands, and the window determination module is configured to determine, according to an association relationship between an identifier of each sub-band in the bandwidth part and a length of a contention window, a length of the contention window corresponding to each sub-band; and determining the length of the target contention window according to a plurality of contention window lengths corresponding to the plurality of sub-bands.
Optionally, the window determining module is configured to weight and sum a plurality of contention window lengths corresponding to the plurality of frequency sub-bands to determine the target contention window length.
Optionally, the target bandwidth part includes a plurality of sub-bands, and the window determination module is configured to determine, according to an association relationship between an identifier of each sub-band in the bandwidth part and a length of a contention window, a length of the contention window corresponding to each sub-band; and determining the length of a competition window with the priority as the target priority as the length of the target competition window in a plurality of lengths of competition windows corresponding to the sub-frequency bands.
Optionally, the multiple frequency sub-bands are continuous, or at least two frequency sub-bands of the multiple frequency sub-bands are discontinuous.
With regard to the apparatus in the above embodiments, the specific manner in which each module performs operations has been described in detail in the embodiments of the related method, and will not be described in detail here.
For the device embodiments, since they substantially correspond to the method embodiments, reference may be made to the partial description of the method embodiments for relevant points. The above-described embodiments of the apparatus are merely illustrative, wherein the modules described as separate parts may or may not be physically separate, and the parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
An embodiment of the present disclosure also provides an electronic device, including:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to implement the method of any of the above embodiments.
Embodiments of the present disclosure also provide a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the steps in the method according to any of the above embodiments.
As shown in fig. 13, fig. 13 is a schematic block diagram illustrating an apparatus 1300 for contention window length determination according to an embodiment of the present disclosure. Apparatus 1300 may be provided as a base station. Referring to fig. 13, apparatus 1300 includes processing components 1322, wireless transmit/receive components 1324, antenna components 1326, and signal processing portions specific to the wireless interface, processing components 1322 may further include one or more processors. One of the processors in processing component 1322 may be configured to implement the method of any of the embodiments described above.
Fig. 14 is a schematic block diagram illustrating an apparatus 1400 for contention window length determination according to an embodiment of the present disclosure. For example, the apparatus 1400 may be a terminal, such as a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and so forth.
Referring to fig. 14, apparatus 1400 may include one or more of the following components: a processing component 1402, a memory 1404, a power component 1406, a multimedia component 1408, an audio component 1410, an input/output (I/O) interface 1412, a sensor component 1414, and a communication component 1416.
The processing component 1402 generally controls the overall operation of the device 1400, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. Processing component 1402 may include one or more processors 1420 to execute instructions to perform all or a portion of the steps of the methods described above. Further, processing component 1402 can include one or more modules that facilitate interaction between processing component 1402 and other components. For example, the processing component 1402 can include a multimedia module to facilitate interaction between the multimedia component 1408 and the processing component 1402.
The memory 1404 is configured to store various types of data to support operations at the apparatus 1400. Examples of such data include instructions for any application or method operating on device 1400, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 1404 may be implemented by any type of volatile or non-volatile storage device or combination of devices, 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 or optical disks.
The power supply component 1406 provides power to the various components of the device 1400. The power components 1406 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 1400.
The multimedia component 1408 includes a screen that provides an output interface between the device 1400 and the user. In some embodiments, 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 an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, 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 associated with the touch or slide operation. In some embodiments, the multimedia component 1408 includes a front-facing camera and/or a rear-facing camera. The front camera and/or the rear camera may receive external multimedia data when the device 1400 is in an operation mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 1410 is configured to output and/or input audio signals. For example, the audio component 1410 includes a Microphone (MIC) configured to receive external audio signals when the apparatus 1400 is in operating modes, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 1404 or transmitted via the communication component 1416. In some embodiments, audio component 1410 further includes a speaker for outputting audio signals.
I/O interface 1412 provides an interface between processing component 1402 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor component 1414 includes one or more sensors for providing various aspects of state assessment for the apparatus 1400. For example, the sensor component 1414 may detect an open/closed state of the apparatus 1400, a relative positioning of components, such as a display and keypad of the apparatus 1400, a change in position of the apparatus 1400 or a component of the apparatus 1400, the presence or absence of user contact with the apparatus 1400, an orientation or acceleration/deceleration of the apparatus 1400, and a change in temperature of the apparatus 1400. The sensor assembly 1414 may include a proximity sensor configured to detect the presence of a nearby object in the absence of any physical contact. The sensor assembly 1414 may also include a photosensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 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 apparatus 1400 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, 4G LTE, 5G NR, or a combination thereof. In an exemplary embodiment, the communication component 1416 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 1416 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the apparatus 1400 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the methods described in any of the above embodiments.
In an exemplary embodiment, a non-transitory computer readable storage medium is also provided, such as the memory 1404 that includes instructions executable by the processor 1420 of the apparatus 1400 to perform the above-described method. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The method and apparatus provided by the embodiments of the present disclosure are described in detail above, and the principles and embodiments of the present disclosure are explained herein by applying specific examples, and the above description of the embodiments is only used to help understanding the method and core ideas of the present disclosure; meanwhile, for a person skilled in the art, based on the idea of the present disclosure, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present disclosure should not be construed as a limitation to the present disclosure.
Claims (16)
1. A method for determining the length of a contention window is applicable to a transmitting end, and the method comprises the following steps:
determining a target bandwidth part after the bandwidth part is switched in an unauthorized frequency band by the sending end;
and determining the length of a target competition window corresponding to the target bandwidth part according to the incidence relation between the frequency domain information of the bandwidth part and the length of the competition window.
2. The method of claim 1, wherein the frequency domain information is an identification of the bandwidth portion.
3. The method of claim 1, wherein the target bandwidth portion comprises one or more sub-bands to be detected, and wherein the frequency domain information is an identification of the sub-bands.
4. The method according to claim 3, wherein the target bandwidth portion includes a plurality of the sub-bands, and the determining the target contention window length corresponding to the target bandwidth portion according to the association relationship between the frequency domain information of the bandwidth portion and the contention window length includes:
determining the length of a contention window corresponding to each sub-frequency band according to the association relationship between the identifier of each sub-frequency band in the bandwidth part and the length of the contention window;
and determining the length of the target contention window according to a plurality of contention window lengths corresponding to the plurality of sub-bands.
5. The method of claim 4, wherein the determining a target contention window length according to a plurality of contention window lengths corresponding to the plurality of frequency sub-bands comprises:
and weighting and summing a plurality of competition window lengths corresponding to the plurality of sub-bands to determine the target competition window length.
6. The method according to claim 3, wherein the target bandwidth portion includes a plurality of the sub-bands, and the determining the target contention window length corresponding to the target bandwidth portion according to the association relationship between the frequency domain information of the bandwidth portion and the contention window length includes:
determining the length of a contention window corresponding to each sub-frequency band according to the association relationship between the identifier of each sub-frequency band in the bandwidth part and the length of the contention window;
and determining the length of a competition window with the priority as the target priority as the length of the target competition window in a plurality of lengths of competition windows corresponding to the sub-frequency bands.
7. The method of claim 3, wherein the plurality of sub-bands are contiguous or at least two of the plurality of sub-bands are non-contiguous.
8. A contention window length determining apparatus, adapted to a transmitting end, the apparatus comprising:
a switching determination module configured to determine a target bandwidth part after the sending end switches the bandwidth part in an unlicensed frequency band;
and the window determining module is configured to determine a 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.
9. The apparatus of claim 8, wherein the frequency domain information is an identification of the bandwidth portion.
10. The apparatus of claim 8, wherein the target bandwidth portion comprises one or more sub-bands to be detected, and wherein the frequency domain information is an identification of the sub-bands.
11. The apparatus according to claim 10, wherein the target bandwidth portion includes a plurality of the sub-bands, and the window determination module is configured to determine a contention window length corresponding to each of the sub-bands according to an association relationship between an identifier of each of the sub-bands in the bandwidth portion and the contention window length; and determining the length of the target contention window according to a plurality of contention window lengths corresponding to the plurality of sub-bands.
12. The apparatus of claim 11, wherein the window determining module is configured to weight and sum a plurality of contention window lengths corresponding to the plurality of sub-bands to determine the target contention window length.
13. The apparatus according to claim 10, wherein the target bandwidth portion includes a plurality of the sub-bands, and the window determination module is configured to determine a contention window length corresponding to each of the sub-bands according to an association relationship between an identifier of each of the sub-bands in the bandwidth portion and the contention window length; and determining the length of a competition window with the priority as the target priority as the length of the target competition window in a plurality of lengths of competition windows corresponding to the sub-frequency bands.
14. The apparatus of claim 10, wherein the plurality of sub-bands are contiguous or at least two of the plurality of sub-bands are non-contiguous.
15. An electronic device, comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to implement the method of any one of claims 1 to 7.
16. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 7.
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