WO2015000159A1 - Procédé d'accès à un canal et équipement de communication - Google Patents

Procédé d'accès à un canal et équipement de communication Download PDF

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Publication number
WO2015000159A1
WO2015000159A1 PCT/CN2013/078804 CN2013078804W WO2015000159A1 WO 2015000159 A1 WO2015000159 A1 WO 2015000159A1 CN 2013078804 W CN2013078804 W CN 2013078804W WO 2015000159 A1 WO2015000159 A1 WO 2015000159A1
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Prior art keywords
backoff
sleep
time
communication device
channel
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PCT/CN2013/078804
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English (en)
Chinese (zh)
Inventor
刘永俊
杨晖
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2013/078804 priority Critical patent/WO2015000159A1/fr
Publication of WO2015000159A1 publication Critical patent/WO2015000159A1/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]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance

Definitions

  • the present invention relates to the field of communications, and in particular, to a channel access method and a communication device. Background technique
  • WiFi/IEEE 802.11 has been used in low-speed scenes including the Internet of Things. At this time, communication equipment has high requirements for low power consumption, and there are a large number of devices, which are usually powered by batteries or self-collecting energy.
  • WiFi/IEEE 802.11 adopts random channel access mode based on CSMA/CA for persistent monitoring, that is, the channel is monitored before transmitting data, and if the channel is idle, data is transmitted, otherwise a random backoff process is initiated, and in the process of random backoff Continuous monitoring of the channel begins to count down the random backoff counter only if the channel is idle for a certain length of time. When the counter is reduced to zero, the data is sent immediately.
  • the technical problem to be solved by the embodiments of the present invention is to provide a channel access method and a communication device, which can enable the communication device to maintain normal operation under the condition of battery power supply or self-collected energy supply.
  • a first aspect of the embodiments of the present invention provides a channel access method, where the method includes:
  • the channel is accessed after the random backoff is completed.
  • the method includes:
  • T back . ff is greater than T max, the duration of the second sleep T brcak2 stopped listening channel when the second sleep;
  • the performing the random backoff after the second sleep wakeup includes:
  • the backoff time is recalculated, and the random backoff is started according to the recalculated backoff time.
  • the recalculating the backoff time includes:
  • the size of the competition window for determining the back-off time is reduced, and the back-off time is recalculated by the reduced contention window.
  • the recalculating the backoff time includes:
  • a second backoff time before the set sleep is T baek.
  • Ff the recalculation backoff time is rand(0, a*T backoff ), where 0 ⁇ a ⁇ 2.
  • the recalculating the backoff time further includes:
  • the performing the random backoff after the first sleep wakeup includes:
  • the T breakl T rcc . Ver , where T remvef is based on the communication device itself - - The battery recovery time determined by the pool characteristic parameter or the energy harvesting characteristic parameter.
  • the determining, before confirming that the random backoff is currently required according to the channel condition further includes:
  • the determining, before confirming that the random backoff is currently required according to the channel condition further includes:
  • T break is the smaller of 1 ⁇ and T re ⁇ .
  • the method further includes:
  • the modifying the maximum contention window parameter of the communication device according to the 1 ⁇ and the T re ⁇ includes:
  • the maximum competition window before the modification of the communication device is cw.
  • the revised maximum competition window is * -! , where k is the largest integer not greater than log 2 (T w /T rec . ver ).
  • the second aspect of the embodiments of the present invention further provides a communication device, where the communication device includes:
  • a random backoff confirmation module configured to confirm that a random backoff is currently required according to a channel condition
  • a backoff module configured to perform a random backoff
  • a first hibernation module configured to perform a first dormancy with a duration of T breakl and a channel dormant for the first dormancy when the persistent channel listening time reaches a continuous listening maximum time T max during the random backoff process performed by the backoff module, After a sleep wakes up, the backoff module is triggered to continue to perform random backoff;
  • An access module configured to access a channel after performing random backoff completion.
  • the communications device further includes: a second dormant module, configured to acquire a current backoff before the backoff module starts performing random backoff - - Time T back . Ff , if T back . If ff is greater than T max , a second sleep with a duration of T brcak 2 is performed, and channel snooping is stopped during the second sleep, and the second loop wakes up to trigger the backoff module to start performing random backoff.
  • a second dormant module configured to acquire a current backoff before the backoff module starts performing random backoff - - Time T back . Ff , if T back . If ff is greater than T max , a second sleep with a duration of T brcak 2 is performed, and channel snooping is stopped during the second sleep, and the second loop wakes up to trigger the backoff module to start performing random backoff.
  • the second dormant module includes:
  • a backoff time calculation unit configured to recalculate the backoff time
  • the backoff triggering unit is configured to trigger the backoff module to perform random backoff according to the recalculated backoff time.
  • the backoff time calculation unit is specifically configured to:
  • the size of the competition window for determining the back-off time is reduced, and the back-off time is recalculated by the reduced contention window.
  • the backoff time calculation unit is specifically configured to:
  • the second hibernation module further includes:
  • the sleep accumulation threshold unit is configured to trigger the backoff time calculation unit to recalculate the backoff time when the current accumulated sleep time reaches the preset threshold.
  • the first dormant module includes:
  • the T breakl T rec . ver, wherein T rc ⁇ VCT own battery recovery time characteristic parameter or parameters determined in accordance with characteristics of the energy harvesting power communication device.
  • the first dormant module includes:
  • the first sleep time acquisition unit is configured to acquire T breakl delivered by the access point device.
  • the first dormant module includes:
  • a second sleep time acquisition unit configured to acquire a reference recovery time Tw delivered by the access point device, and determine a power recovery time according to the battery characteristic parameter or the energy collection characteristic parameter of the communication device itself
  • T recover determines that T break is the smaller of T w and T recover.
  • the first dormant module further includes:
  • the competition window modification unit is configured to modify the maximum contention window parameter of the communication device according to 1 ⁇ and T re ⁇ w .
  • the contention window modification module is specifically configured to:
  • the maximum competition window before the modification of the communication device is cw.
  • the revised maximum competition window is *! -, wherein k is not greater than log 2 (T w / T rec ver.) The largest integer.
  • a third aspect of the embodiments of the present invention further provides a communications device, including: a receiving module, a sending module, a memory, and a processor, wherein the memory stores a set of program codes, and the processor is configured to call the storage in the memory.
  • Program code used to do the following:
  • the channel is accessed through the sending module.
  • the processor performs the following operations after performing the random backoff according to the channel condition of the snoop receiving module:
  • Tbackcrff is greater than T maX , performing a second sleep with a duration of T break 2 , and the receiving module stops channel monitoring during the second sleep;
  • the random backoff is started after the second sleep wakes up.
  • the processor performs wake-up after a sleep T break2 , starts channel monitoring, and starts performing a random backoff operation, where - - Re-calculate the back-off time after the second sleep wake-up, and start random back-off based on the recalculated back-off time.
  • the processor performs an operation of recalculating a backoff time, including:
  • the size of the competition window for determining the back-off time is reduced, and the back-off time is recalculated by the reduced contention window.
  • the performing, by the processor, re-calculating the backoff time includes:
  • the processor performs the following operations before performing the operation of recalculating the backoff time:
  • the performing, by the processor, performing the operation of the random backoff after performing the first sleep wakeup includes:
  • the T breakl T rec. Ver , where T re ⁇ ve r is the power recovery time determined according to the battery characteristic parameter or the energy collection characteristic parameter of the communication device itself.
  • the performing, by the processor, performing the operation that performs the random backoff according to the channel condition is further performed. The following operations:
  • the performing, by the processor, performing the operation of performing the random backoff according to the channel condition is further performed The following operations: - - delivered by the module obtains the access point device with reference to the recovery time T w by said receiving;
  • T break is the smaller of 1 ⁇ and T re ⁇ .
  • the processor is further configured to perform the following operations:
  • the processor performs an operation of modifying a maximum contention window parameter of the communication device according to 1 ⁇ and T re ⁇ , including:
  • the maximum competition window before the communication device is modified is cw.
  • the revised maximum competition window is *! -, wherein k is not greater than log 2 (T w / T rec ver.) The largest integer.
  • the storage power of the communication device can be restored in time, and the power supply is prevented from being over-discharged or the stored power is exhausted, so that the device cannot work normally.
  • FIG. 1 is a schematic flowchart of a channel access method according to an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of a channel access method according to another embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a channel access method according to another embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a communication device according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a first sleep module of a communication device according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a second sleep module of a communication device according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a communication device in another embodiment of the present invention.
  • the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. . All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • the channel access method in this embodiment may include:
  • the communication device may need to send data due to application triggering, etc., to determine that channel access is currently required.
  • the channel can be determined to be busy. If the current channel condition meets the preset access condition, the channel access can be directly initiated. Otherwise, random backoff is required.
  • the current random backoff time T back can be determined by selecting a random time value between 0 and the competition window. ff, the backoff process performed continuously monitor the channel, only when the channel is idle for more than a certain time before the backoff counter is counting down.
  • the competition window may set an initial maximum value and a minimum value, and dynamically adjust the current contention window size of the communication device according to the data transmission failure or success. Other existing methods of calculating random backoff time may also be employed in other alternative embodiments.
  • the communication device may consume more power than the energy storage module of the communication device (for example, the storage capacitor in parallel for the power supply circuit, The equivalent capacity of the battery, etc., can store the power, which may cause the power supply to be over-discharged. If it is powered by the self-collecting energy source, it may also exhaust the previously stored power, making the device unable to work normally.
  • the energy storage module of the communication device for example, the storage capacitor in parallel for the power supply circuit, The equivalent capacity of the battery, etc., can store the power, which may cause the power supply to be over-discharged. If it is powered by the self-collecting energy source, it may also exhaust the previously stored power, making the device unable to work normally.
  • the maximum listening time T max in the battery-powered scenario can be calculated according to the following formula:
  • T max is not higher than the maximum stored energy of the communication device according to the total power consumption (3 ⁇ 4 ⁇
  • Q max ⁇ Ii*ti by subtracting all known ti from ⁇ ti obtained by the above formula, the maximum listening time T max in the self-collecting power supply environment can be obtained.
  • T breakl can be determined in the following three ways:
  • T breakl can take the value of T re ⁇ VCT
  • T re ⁇ VCT is the power recovery time determined according to the battery characteristic parameter or the energy collection characteristic parameter of the communication device itself. Taking the battery-powered scene as an example, it can be calculated by the following formula: T recover*
  • T rec0 ver RiC*ln[(V p -V min )/(V p -V max )], where Ri is the equivalent resistance of the battery of the communication device,
  • C is the equivalent capacitance value of the battery
  • V min is the lowest supply voltage
  • V max is the voltage on the capacitor at the beginning of the battery life change
  • V p is the battery voltage at no load.
  • 1 ⁇ may be changed, and the device needs to estimate the T re ⁇ w according to the change of the environment or the historical situation of the previous electricity generation.
  • the T breakl delivered by the access point device is obtained in advance. That is, the power recovery time specified by the network can be sent by the access point device to the communication device when the communication device enters the network.
  • Ver modifies the maximum competition window parameter of the communication device. For example, if the maximum competition window before the modification of the communication device is CW 0 , the modified maximum competition window is CW CW0+1V2 L1 , where k is the largest integer not greater than log 2 (T w /T rec . ver ).
  • FIG. 2 is a schematic flowchart of a channel access method according to another embodiment of the present invention.
  • the channel access method in this embodiment may include: - -
  • detecting that channel access is required Specifically, the communication device may need to send data due to application triggering, etc., to determine that channel access is currently required.
  • the channel can be determined to be busy. If the current channel condition meets the preset access condition, the channel access can be directly initiated. Otherwise, random backoff is required.
  • the communication device may acquire the current backoff time T back before starting to perform random backoff. Ff , if T back . If ff is greater than T max , that is, the random backoff cannot be completed within the maximum listening duration, then S204 is performed, otherwise S205 is performed.
  • the communication device only performs the initial channel monitoring operation, and the monitoring time is usually short (such as several hundred us), and does not consume too much power, so T brcak2 can also be based on The current power consumption takes a shorter time value.
  • S207 Determine whether the persistent channel listening time reaches the continuous listening maximum time Tmax , and if yes, execute S208, otherwise continue to perform random backoff.
  • T breakl performing a first sleep with a duration of T breakl , and stopping channel monitoring during the first sleep.
  • Performing the first hibernation can restore the storage capacity of the communication device, avoiding excessive discharge of the power supply or exhausting the stored power so that the device does not work properly.
  • the calculation method of the T breakl is described in detail in the foregoing embodiment, and is not described in detail in this embodiment.
  • the network busy probability p is an estimate of the busyness of the network service, and can be estimated according to the average network traffic, for example, may be equal to the average network traffic divided by the total throughput, or may be estimated in advance by the access point. And sent to the communication device of the access channel. It should be noted that S208 is an optional step in this embodiment, and the total access delay caused by the first sleep can be reduced after execution.
  • FIG. 3 is a schematic flowchart of a channel access method according to another embodiment of the present invention. As shown in the figure, the channel access method in this embodiment may include:
  • the communication device may need to send data due to application triggering, etc., to determine that channel access is currently required.
  • the channel can be determined to be busy. If the current channel condition meets the preset access condition, the channel access can be directly initiated. Otherwise, random backoff is required.
  • the communication device may acquire the current backoff time T back before starting to perform random backoff.
  • Ff if T back . ff is greater than T max, i.e., not capable of continuously monitoring the maximum random backoff time to complete, S304, is executed, otherwise, execute S308.
  • S305 Determine whether the currently accumulated sleep time reaches a preset threshold. Specifically, the sleep time may be accumulated from the previous calculation of the backoff time, for example, after each update of the competition window. After the second sleep wakes up, it is judged whether the currently accumulated sleep time reaches the preset time threshold. If yes, S306 is recalculated to calculate the backoff time, otherwise, S308 is performed. It should be noted that S305 is an optional step in this embodiment, that is, in an alternative embodiment, S306 may be re-calculated after the second sleep wake-up.
  • S306 Recalculates the backoff time. Specifically, after the communication device enters sleep, a relatively large delay may be added to the service. To shorten the delay, the backoff time may be recalculated after the second sleep wake-up to shorten the average access delay. In the specific implementation, the backoff time can be recalculated in the following two ways:
  • the recalculated backoff time is rand(0, a* T back ff ), where 0 ⁇ a ⁇ 2, T baek .
  • Ff is the backoff time before the second sleep, that is, 0 to a* T baek .
  • a random number between ff , the preferred constant a can take 0 ⁇ a ⁇ l.
  • the communication device can initiate an access channel.
  • the S308 and the subsequent S309-S312 are the same as the S103-S107 in the previous embodiment, and may be referred to in the foregoing embodiment, and are not described in this embodiment.
  • FIG. 4 is a schematic structural diagram of a communication device according to an embodiment of the present invention. As shown in the figure, the communication device in the embodiment of the present invention may include at least:
  • the random backoff confirmation module 410 is configured to confirm that a random backoff is currently required according to the channel condition.
  • the communication device may need to send data due to application triggering, etc., thereby determining that channel access is currently required, and the channel busy state may be determined by monitoring the channel before the access channel transmits data, if the current channel condition satisfies the preset connection.
  • the entry condition can directly initiate channel access, otherwise random backoff is required.
  • the backoff module 420 is configured to perform random backoff. Specifically, in the embodiment of the present invention, the backoff module 420 may determine the current random backoff time T backoff by selecting a random time value between 0 and the competition window, and continuously monitor the channel during the backoff process, only when the channel is idle for more than a certain period. The time backoff module 420 performs the backoff counter down counting.
  • the competition window may set an initial maximum value and a minimum value, and dynamically adjust the current contention window size of the communication device according to the data transmission failure or success. In its - - Other existing methods of calculating random backoff time may also be employed in alternative embodiments.
  • First sleep module 430 for the process module 420 performs a random backoff backoff when a channel duration time duration reaches the maximum duration listening time T max, the duration of the first sleep T breakl, the first channel-sounding stop Sleep After the first sleep wakes up, the trigger backoff module 420 continues to perform random backoff.
  • the backoff module 420 performs the continuous listening channel during the random backoff process, and when the continuous channel listening time reaches the continuous listening maximum time T max , it indicates that the communication device consumes more power than the communication device energy storage module (for example, power supply)
  • the amount of power that can be stored by the parallel storage capacitors, the equivalent capacitance of the battery, etc., may cause the power supply to be over-discharged.
  • the device If it is powered by the self-collecting energy source, it may be exhausted before the power stored so that the device does not work properly.
  • C is the equivalent capacitance of the cell communication device, by the formula obtained by subtracting all known ⁇ ti ti, to obtain the scene under battery power monitor a maximum time T max; in an electric power collection from ambient T max According to the total power consumption is not higher than the maximum stored energy of the communication device (3 ⁇ 4 ⁇ to determine, that is, Q max ⁇ Ii*ti, the ⁇ ti obtained by the above formula minus all known ti, then the self-collecting power supply can be obtained. monitor the maximum time T max under the circumstances.
  • the first hibernation module 430 triggers the first hibernation to enable the storage device to recover the power, avoiding the power supply being over-discharged or exhausting the stored power, so that the device cannot work normally, and the first dormant wake-up triggers the retreat module 420 to continue performing the Random backoff.
  • T breakl can be determined in the following three ways:
  • T recover* T breakl possible value of T rce. , T rce .
  • T rec0 ver RiC*ln[(V p -V min )/(V p -V max )], where Ri is the equivalent resistance of the battery of the communication device,
  • C is the equivalent capacitance value of the battery
  • V min is the lowest supply voltage
  • V max is the end of the battery life.
  • - - The voltage at the beginning of the capacitor
  • V p is the battery voltage at no load.
  • T re ⁇ ver may change, and the device needs to estimate the T re ⁇ ver according to the change of the environment or the historical situation of the previous electricity generation.
  • the T breakl delivered by the access point device is obtained in advance. That is, the power recovery time specified by the network can be sent by the access point device to the communication device when the communication device enters the network.
  • the first hibernation module in the embodiment of the present invention may further include: a virtual backoff calculation unit 431, a first sleep time acquisition unit 432, a second sleep time acquisition unit 433, and a competition window modification unit 434. among them:
  • the network busy probability p is an estimate of the busyness of the network service
  • the virtual backoff calculation unit 431 can estimate the average network traffic, for example, can be equal to the average network traffic divided by the total throughput, and the virtual backoff computing unit
  • the 431 may also obtain the estimated network busy probability p that is estimated and obtained from the access point device in advance.
  • the virtual backoff calculation unit 431 is an optional unit in the embodiment of the present invention, which can reduce the total access delay caused by the first sleep.
  • the first sleep time acquisition unit 432 is configured to acquire T breakl delivered by the access point device. That is, the first sleep time T breaM is obtained by the second method described above.
  • Second sleep time acquisition unit 433 for acquiring the access point device made with reference to the recovery time T w, or energy parameter acquisition characteristic parameter according to the communication apparatus itself is determined battery charge characteristic recovery time T re ⁇ VCT, determining T break For T w and T rec .
  • the Competitive window modification unit 434 parameters for the maximum competitive window T w and T re ⁇ ver modifying communication device.
  • the unit is an optional unit.
  • the competition window modification unit 434 is based on T w and T rec . Ver repair - - Change the maximum competition window parameter of the communication device. For example, if the maximum contention window before the modification of the communication device is CW 0 , the maximum contention window modified by the competition window modification unit 434 is , where k is the largest integer not greater than log 2 (T w /T re ⁇ ver ).
  • the access module 440 is configured to access the channel after performing random backoff.
  • the communications device in the embodiment of the present invention may further include:
  • the second hibernation module 450 is configured to acquire the current backoff time T back before the backoff module 420 starts performing random backoff. Ff , if T baek . If ff is greater than T max , a second sleep with a duration of T break 2 is performed, and channel snooping is stopped during the second sleep, and the second sleep wake-up triggers the backoff module to start performing random backoff. Specifically, if the current backoff time is T back . If ff is greater than T max , that is, the random backoff cannot be completed in the continuous listening maximum time, the second sleep is performed for a duration of T break 2 , and the channel monitoring is stopped during the second sleep.
  • the duration of the second sleep, T break2 may be the same as the duration of the first sleep, T breakl .
  • the time of the monitoring is usually short (such as several hundred us), and does not consume too much power, so T break2 also A shorter time value can be taken based on the current power consumption.
  • the second hibernation module 450 in the embodiment of the present invention may include at least a backoff time calculation unit 451 and a backoff trigger unit 452, where:
  • the backoff time calculation unit 451 is for recalculating the backoff time. Specifically, after the communication device enters the sleep state, a relatively large delay may be added to the service. To shorten the delay, the backoff time calculation unit 451 may recalculate the backoff time after the second sleep wakeup to shorten the average access delay. . In a specific implementation, the backoff time calculation unit 451 can recalculate the backoff time in the following two ways:
  • the recalculated backoff time is rand(0, a* T back ff ), where 0 ⁇ a ⁇ 2, T baek .
  • Ff is the backoff time before the second sleep, that is, 0 to a* T baek .
  • a random number between ff , the preferred constant a can take 0 ⁇ a ⁇ l.
  • the backoff triggering unit 452 is configured to trigger the backoff module 420 to perform random backoff according to the recalculated backoff time.
  • the optional second hibernation module 450 may further include:
  • the sleep accumulation threshold unit 453 is configured to trigger the backoff time calculation unit to recalculate the backoff time when the current accumulated sleep time reaches the preset threshold.
  • the sleep accumulation threshold unit 453 may calculate the sleep time from the previous calculation of the backoff time, and determine whether the currently accumulated sleep time reaches the preset time threshold after the second sleep wakeup, and if so, trigger the backoff time calculation.
  • Unit 451 recalculates the backoff time.
  • FIG. 7 is a schematic structural diagram of a communication device in another embodiment of the present invention. As shown in FIG. 7, FIG. 7 shows a specific embodiment of a communication device.
  • the communication device 70 can include a transmitting module 702, a receiving module 703, a processor 704, a memory 705, and an antenna 701.
  • Processor 704 is responsible for the logical operation of communication device 70.
  • Memory 705 can include read only memory and random access memory and provides instructions and data to processor 704. A portion of memory 705 may also include non-volatile random access memory (NVRAM).
  • NVRAM non-volatile random access memory
  • the communication device 70 may be embedded or may itself be a wireless communication device such as an electronic tag, a mobile phone, or may include a carrier that houses the transmitting module 702 and the receiving module 703 to allow the communication device 70 and other communication devices. Such as data transmission and reception between access point devices. Transmitting module 702 and receiving module 703 can be coupled into antenna 701.
  • the various components of communication device 70 are coupled together by a bus system 706, which in addition to the data bus includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as bus system 706 in the figure.
  • the method disclosed in the foregoing embodiments of the present invention may be applied to the processor 704, or implemented by the processor 704, and may be used to perform at least the following operations:
  • the first sleep of the duration T break1 is performed, and the first sleep receiving module 703 stops the channel monitoring;
  • the channel is accessed by the transmitting module 702 after the random backoff is completed.
  • the communication device described above with reference to FIG. 4 to FIG. 6 may be specifically implemented by the communication device 70 shown in FIG. 7 , and the random backoff confirmation module 410 , the backoff module 420 , and the first dormant module in the communication device. 430.
  • the access module 440 and the second hibernation module 450 are both - is understood to be a logical functional module of the processor 704 in the communication device 70 of FIG.
  • Processor 704 may be an integrated circuit chip with the ability to execute instructions and data, as well as the processing capabilities of the signals. In the process of implementing the channel access method in the embodiment of the present invention, the steps of the method introduced in FIG. 1 to FIG.
  • the above processor may be a general purpose processor (CPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, a discrete gate or a transistor logic device, Discrete hardware components.
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or executed.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the processor 704 can be at least one microprocessor.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software modules can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 705.
  • the processor 704 reads the information in the memory 705, and performs some or all of the steps including the power channel access method described in the foregoing embodiment of the method shown in FIG. 1 to FIG.
  • the storage capacity of the communication device can be restored, and the power supply is prevented from being over-discharged or the stored power is exhausted, so that the device cannot work normally.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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Abstract

L'invention concerne un procédé d'accès à un canal, le procédé consistant à : déterminer, selon les conditions d'un canal, qu'une réduction de puissance aléatoire est actuellement nécessaire ; dans le processus d'exécution de réduction de puissance aléatoire, réaliser une première dormance ayant une durée de Tpause1 lorsqu'un temps d'écoute de canal continue atteint un temps d'écoute continue maximal Tmax, et arrêter l'écoute de canal durant la première dormance ; continuer à exécuter la réduction de puissance aléatoire après un réveil à partir de la première dormance ; et accéder au canal lors de l'achèvement de la réduction de puissance aléatoire. L'invention concerne en outre un équipement de communication. L'adoption de la présente invention permet la récupération opportune de stockage d'énergie dans l'équipement de communication, évitant une situation dans laquelle l'équipement ne parvient pas à fonctionner normalement en raison d'un maintien d'un fort débit sortant de la source d'alimentation ou de l'épuisement de l'énergie stockée.
PCT/CN2013/078804 2013-07-04 2013-07-04 Procédé d'accès à un canal et équipement de communication WO2015000159A1 (fr)

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PCT/CN2013/078804 WO2015000159A1 (fr) 2013-07-04 2013-07-04 Procédé d'accès à un canal et équipement de communication

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PCT/CN2013/078804 WO2015000159A1 (fr) 2013-07-04 2013-07-04 Procédé d'accès à un canal et équipement de communication

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WO2015000159A1 true WO2015000159A1 (fr) 2015-01-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018147779A1 (fr) 2017-02-08 2018-08-16 Scania Cv Ab Boîte de vitesses pour véhicules

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101795498A (zh) * 2010-01-15 2010-08-04 东南大学 无线传感器网络基于数据优先级的信道竞争接入方法
CN102802270A (zh) * 2011-05-27 2012-11-28 华为技术有限公司 随机接入的处理方法、基站、终端及系统
WO2013009347A1 (fr) * 2011-07-08 2013-01-17 Intel Corporation Dispositif sans fil et procédé pour accéder à un canal sans fil

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101795498A (zh) * 2010-01-15 2010-08-04 东南大学 无线传感器网络基于数据优先级的信道竞争接入方法
CN102802270A (zh) * 2011-05-27 2012-11-28 华为技术有限公司 随机接入的处理方法、基站、终端及系统
WO2013009347A1 (fr) * 2011-07-08 2013-01-17 Intel Corporation Dispositif sans fil et procédé pour accéder à un canal sans fil

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018147779A1 (fr) 2017-02-08 2018-08-16 Scania Cv Ab Boîte de vitesses pour véhicules

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