WO2017166162A1 - Procédé d'accès à un canal de liaison montante et dispositif associé - Google Patents

Procédé d'accès à un canal de liaison montante et dispositif associé Download PDF

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Publication number
WO2017166162A1
WO2017166162A1 PCT/CN2016/077986 CN2016077986W WO2017166162A1 WO 2017166162 A1 WO2017166162 A1 WO 2017166162A1 CN 2016077986 W CN2016077986 W CN 2016077986W WO 2017166162 A1 WO2017166162 A1 WO 2017166162A1
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WIPO (PCT)
Prior art keywords
base station
mode
uplink channel
random backoff
contention window
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PCT/CN2016/077986
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English (en)
Chinese (zh)
Inventor
李晓翠
徐凯
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to RU2018133833A priority Critical patent/RU2696220C1/ru
Priority to CN201680081376.7A priority patent/CN108605341B/zh
Priority to PCT/CN2016/077986 priority patent/WO2017166162A1/fr
Publication of WO2017166162A1 publication Critical patent/WO2017166162A1/fr
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present invention relates to the field of communications, and in particular, to an uplink channel access method and related devices.
  • the spectrum used by wireless communication systems is divided into a licensed spectrum and an unlicensed spectrum.
  • operators need to auction licensed spectrum, and only authorized devices can use the corresponding spectrum to carry out mobile communication operations.
  • Unlicensed spectrum does not require auctions, and any device can legally use these bands, such as wireless fidelity (Wireless Fidelity, Wi-Fi) in the 2.4 GHz and 5 GHz bands.
  • LAA Licensed-Assisted Access
  • LBT listen before talk
  • CSMA Carrier Sense Multiple Access
  • the uplink channel access scheme is not defined, so the access problem of the uplink channel cannot be solved.
  • the embodiments of the present invention provide an uplink channel access method and related equipment, which are used to solve an uplink channel access problem in an LAA system.
  • the first aspect provides an uplink channel access method, where the method is applied to an authorized auxiliary access LAA system, where the method includes: a user equipment (English name: User Equipment, abbreviation: UE) receives an uplink data scheduling manner sent by a base station, where The uplink data scheduling mode includes the cross-carrier scheduling and/or the self-scheduling.
  • a user equipment English name: User Equipment, abbreviation: UE
  • the uplink data scheduling mode includes the cross-carrier scheduling and/or the self-scheduling.
  • the uplink data scheduling mode is the cross-carrier scheduling mode
  • the UE accesses the uplink channel by using the first mode, where the first mode includes the first parameter.
  • the first parameter is that the base station sets an access parameter for the uplink channel configured by the base station; when the uplink data scheduling mode is self-scheduling, the UE accesses the uplink channel by using the second mode, where the second mode is There is no random backoff mechanism to listen to the LBT method.
  • the UE accesses the uplink channel by using the first mode
  • the uplink data scheduling mode determined by the base station is the self-scheduling mode
  • the UE accesses by using the second mode.
  • the upstream channel solves the uplink channel access problem in the LAA system.
  • the first parameter included in the first mode is an uplink channel access parameter configured by the base station for the UE, instead of being configured by the UE, so that multiple UEs can be simultaneously accessed to the uplink channel, thereby improving the utilization of the uplink channel. Rate and make effective use of communication resources.
  • the first parameter includes a random backoff counter and/or a contention window size, wherein the value of the random backoff counter and/or the contention window size is configured by the base station. That is, the values of the random backoff counter and the contention window size are uniformly configured by the base station.
  • the random backoff counter is configured by the base station by using a radio resource control (English name: Radio Resource Control, abbreviation: RRC), where the RRC includes configuration information of the random backoff count.
  • RRC Radio Resource Control
  • the random backoff counter is configured by the base station by using a physical downlink control channel (English name: Physical Downlink Control Channel, abbreviated as PDCCH), where the PDCCH includes first information for indicating configuration information of the random backoff counter. Bit information.
  • the contention window size is configured by the eNB by using an RRC, where the RRC includes configuration information of the contention window size; or the contention window size is configured by the base station by using a PDCCH.
  • the PDCCH includes second bit information for indicating configuration information of the contention window size.
  • the base station may perform the semi-static configuration of the random backoff counter and/or the contention window size through the RRC, or the base station may dynamically configure the random backoff counter and/or the contention window size through the PDCCH, which is not specifically limited herein.
  • the UE accessing the uplink channel by using the first mode includes: performing, by the UE, channel detection on the uplink channel; and when the UE detects that the uplink channel is idle, accessing the uplink channel;
  • the UE detects that the uplink channel is occupied it performs random backoff, that is, acquires the N value of the random backoff counter configured by the base station (N is an integer greater than 0), and each time a free time slot is detected, the random backoff counter The value is decremented by 1.
  • N is an integer greater than 0
  • the UE when the uplink data scheduling mode determined by the base station is cross-carrier scheduling, the UE first detects the uplink channel before the UE accesses the uplink channel, and accesses the uplink channel when the UE detects that the uplink channel is idle. And transmitting the uplink data to the base station by using the uplink channel.
  • the UE detects that the uplink channel is occupied, the UE does not directly access the uplink channel, but performs a random backoff mechanism and then accesses the uplink channel, thereby avoiding the uplink.
  • the UE cannot normally send the uplink data to the base station through the uplink channel.
  • the UE accessing the uplink channel by using the second mode includes: detecting, by the UE, the uplink channel; when the UE detects that the idle time corresponding to the uplink channel is greater than a first threshold, Accessing the uplink channel, wherein the first threshold is configured by the base station.
  • the uplink data scheduling mode sent by the base station to the UE is self-scheduling, only the uplink channel needs to be detected, and the operation is simple.
  • the UE detects that the idle time corresponding to the uplink channel is greater than the first threshold the detection of the uplink channel is terminated, the uplink channel is accessed, and the uplink data is sent to the base station by using the uplink channel, where the first The threshold is configured by the base station according to the actual situation.
  • the first threshold is 25 microseconds, which is not specifically limited herein.
  • a second aspect provides an uplink channel access method, where the method is applied to an authorized auxiliary access LAA system, where the method includes: determining, by the base station, an uplink data scheduling mode, where the uplink data scheduling mode includes cross-carrier scheduling and/or self-scheduling
  • the base station sends the determined uplink data scheduling mode to the user equipment UE, where, when the base station determines that the uplink data scheduling mode is the cross-carrier scheduling, the UE accesses the uplink channel by using the first mode, where the first
  • the method includes a first parameter, where the first parameter is an uplink channel access parameter configured by the base station for the UE, and when the base station determines that the uplink data scheduling mode is the self-scheduling, the UE accesses the second mode.
  • the uplink channel, wherein the second mode is an LBT mode in which there is no random backoff mechanism.
  • the base station first determines the uplink data scheduling mode, and sends the corresponding uplink data scheduling mode to the UE, so that the UE selects the corresponding uplink data scheduling mode to access the uplink channel, and sends the uplink data to the base station, thereby solving the LAA system.
  • Upstream channel access problem
  • the first parameter includes a random backoff counter and/or a contention window size, wherein the value of the random backoff counter and/or the contention window size is configured by the base station.
  • the random backoff counter is configured by the base station by using a radio resource control RRC, where the RRC includes configuration information of the random backoff count; or the random backoff counter is the base station passing physical
  • the downlink control channel PDCCH is configured, where the PDCCH includes first bit information indicating configuration information of the random backoff counter.
  • the contention window size is configured by the eNB by using an RRC, where the RRC includes configuration information of the contention window size; or the contention window size is configured by the base station by using a PDCCH.
  • the PDCCH includes second bit information for indicating configuration information of the contention window size.
  • the random backoff counter and the contention window size are uniformly configured by the base station, and multiple UEs can be guaranteed to access the channel at the same time, thereby improving the utilization of the uplink channel and effectively utilizing the communication resources.
  • the base station may perform the semi-static configuration of the random backoff counter and the contention window size through the RRC, or the base station may dynamically configure the random backoff counter and the contention window size through the PDCCH, which is not specifically limited herein.
  • the third aspect provides a user equipment UE, where the UE is applied to an authorized auxiliary access LAA system, and the UE includes: a receiving module, configured to receive an uplink data scheduling manner sent by the base station, where the uplink data scheduling manner includes cross-carrier scheduling and/or Or the self-scheduling; the first access module is configured to access the uplink channel by using the first mode when the uplink data scheduling mode is the cross-carrier scheduling, where the first mode includes a first parameter, where the first The parameter is an uplink channel access parameter configured by the base station for the UE, and the second access module is configured to access the uplink channel by using the second mode when the uplink data scheduling mode is self-scheduling, where the second mode is There is no random backoff mechanism to listen to the LBT method.
  • a receiving module configured to receive an uplink data scheduling manner sent by the base station, where the uplink data scheduling manner includes cross-carrier scheduling and/or Or the self-scheduling
  • the first access module is configured to access the uplink channel
  • the first access module accesses the uplink channel by using the first mode
  • the receiving module receives the uplink data scheduling sent by the base station to the UE.
  • the second access module accesses the uplink channel by using the second mode, thereby solving the uplink channel access problem in the LAA system.
  • the first parameter included in the first mode is an uplink channel access parameter configured by the base station for the UE, instead of being configured by the UE, so that multiple UEs can be simultaneously accessed to the uplink channel, thereby improving the utilization of the uplink channel. Rate and make effective use of communication resources.
  • the first parameter includes a random backoff counter and/or a contention window.
  • the port size, wherein the value of the random backoff counter and/or the contention window size is configured by the base station.
  • the random backoff counter is configured by the eNB by using a radio resource control RRC, where the RRC includes configuration information of the random backoff count;
  • the random backoff counter is configured by the base station by using a physical downlink control channel PDCCH, where the PDCCH includes first bit information indicating configuration information of the random backoff counter.
  • the contention window size is configured by the base station by using an RRC, where the RRC includes configuration information of the contention window size;
  • the contention window size is configured by the base station by using a PDCCH, where the PDCCH includes second bit information for indicating configuration information of the contention window size.
  • the random backoff counter and the contention window size are uniformly configured by the base station, and multiple UEs can be guaranteed to access the channel at the same time, thereby improving the utilization of the uplink channel and effectively utilizing the communication resources.
  • the base station may perform the semi-static configuration of the random backoff counter and the contention window size through the RRC, or the base station may dynamically configure the random backoff counter and the contention window size through the PDCCH, which is not specifically limited herein.
  • the first access module is specifically configured to perform channel detection on the uplink channel, and when detecting that the uplink channel is idle, access the uplink channel; when detecting that the uplink channel is detected When occupying, perform random backoff, that is, obtain the N value of the random backoff counter configured by the base station (N is an integer greater than 0), and each time an idle time slot is detected, the value of the random backoff counter is decremented by 1 when After being reduced to 0, the defer duration of the uplink channel is detected again, and when the defer duration is idle, the uplink channel is accessed.
  • the UE when the uplink data scheduling mode sent by the base station to the UE is the cross-carrier scheduling, the UE first detects the uplink channel before the UE accesses the uplink channel, and accesses the uplink when the UE detects that the uplink channel is idle. Channel, and transmitting the uplink data to the base station through the uplink channel.
  • the UE detects that the uplink channel is occupied, the UE does not directly access the uplink channel, but performs random backoff and accesses the uplink channel, thereby avoiding the
  • the uplink channel is occupied the UE cannot normally send the uplink data to the base station through the uplink channel.
  • the second access module is configured to detect the uplink channel, and when detecting that the idle time corresponding to the uplink channel is greater than the first threshold, accessing the uplink a channel, wherein the first threshold is configured by the base station.
  • the second access module only needs to detect the uplink channel, and the operation is simple.
  • the first threshold is The base station is configured according to the actual situation.
  • the first threshold is 25 microseconds, which is not specifically limited herein.
  • a fourth aspect provides a base station, where the base station is applied to an authorized auxiliary access LAA system, where the base station includes: a determining module, configured to determine an uplink data scheduling manner, where the uplink data scheduling manner includes cross-carrier scheduling and/or self-scheduling a sending module, configured to send the uplink data scheduling manner determined by the determining module to the user equipment UE, where, when the base station determines that the uplink data scheduling mode is the cross-carrier scheduling, the UE accesses the first mode An uplink channel, where the first mode includes a first parameter, where the first parameter is an uplink channel access parameter configured by the base station for the UE, and when the base station determines that the uplink data scheduling mode is the self-scheduling, the UE passes the The second mode accesses the uplink channel, where the second mode is an LBT mode without a random backoff mechanism.
  • a determining module configured to determine an uplink data scheduling manner, where the uplink data scheduling manner includes cross-carrier scheduling and/or self
  • the base station first determines the uplink data scheduling mode for scheduling the uplink data to the UE, and sends the corresponding uplink data scheduling mode to the UE, so that the UE selects the corresponding uplink data scheduling mode to access the uplink channel, and sends the uplink data to the base station.
  • the uplink channel access problem in the LAA system is solved.
  • the first parameter includes a random backoff counter and/or a contention window size, wherein the value of the random backoff counter and/or the contention window size is configured by the base station.
  • the random backoff counter is configured by the base station by using a radio resource control RRC, where the RRC includes configuration information of the random backoff count; or the random backoff counter is the base station passing physical
  • the downlink control channel PDCCH is configured, where the PDCCH includes first bit information indicating configuration information of the random backoff counter.
  • the contention window size is configured by the eNB by using an RRC, where the RRC includes configuration information of the contention window size; or the contention window size is configured by the base station by using a PDCCH.
  • the PDCCH includes second bit information for indicating configuration information of the contention window size.
  • the random backoff counter and the contention window size are uniformly configured by the base station, and multiple UEs can be guaranteed to access the channel at the same time, thereby improving the utilization of the uplink channel and effectively utilizing the communication resources.
  • the base station may perform the semi-static configuration of the random backoff counter and the contention window size through the RRC, or the base station may dynamically configure the random backoff counter and the contention window size through the PDCCH, which is not specifically limited herein.
  • a fifth aspect provides a user equipment UE, comprising: one or more processors, a memory, a bus system, and a transceiver, wherein the processor, the memory, and the transceiver are connected by the bus system; wherein One or more programs are stored in the memory, the one or more programs comprising instructions that, when executed by the UE, cause the UE to perform the method as described in the first aspect or any one of the possible implementations of the first aspect .
  • the UE accesses the uplink channel by using the first mode, and when the uplink data scheduling mode sent by the base station to the UE is the self-scheduling mode, the UE passes the The second mode accesses the uplink channel, thereby solving the uplink channel access problem in the LAA system.
  • the first parameter included in the first mode is an uplink channel access parameter configured by the base station for the UE, instead of being configured by the UE, so as to ensure that multiple UEs simultaneously access the channel, thereby improving the utilization of the uplink channel. , effectively use communication resources.
  • FIG. 1 is a schematic structural diagram of an LAA system according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a UE according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of an embodiment of an uplink channel access method according to an embodiment of the present disclosure
  • 4a is a schematic diagram of an embodiment of UE cross-carrier scheduling according to an embodiment of the present invention.
  • 4b is a schematic diagram of an embodiment of UE self-scheduling according to an embodiment of the present invention.
  • FIG. 5 is another schematic structural diagram of a UE according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a mechanism of a base station according to an embodiment of the present invention.
  • FIG. 7 is another schematic structural diagram of a UE according to an embodiment of the present invention.
  • the technical solution of the present invention is applied to an LAA system, where the LAA system includes a UE and a base station.
  • the base station transmits downlink data to the UE
  • the UE transmits uplink data to the base station.
  • the UE 200 includes a communication unit 201, an input unit 202, an output unit 203, a processor 204, a storage unit 205, and a peripheral interface 206, and each unit is connected by one or more buses. .
  • the communication unit 201 is configured to establish a communication channel such that the UE connects to the remote server through the communication channel and media data from the remote server.
  • the communication unit may include a wireless local area network (English name: Wireless Local Area Network, abbreviation: wireless LAN) module, a Bluetooth module, an NFC module, a baseband module, and the like, and a radio frequency corresponding to the communication module.
  • Radio Frequency, abbreviation: RF Radio Frequency, abbreviation: RF
  • RF Radio Frequency, abbreviation: RF
  • Bluetooth communication NFC communication
  • infrared communication and/or cellular communication system communication, such as wideband code division multiple access (English full name: Wideband Code Division) Multiple Access, abbreviation: W-CDMA) and/or high-speed downlink packet access (English full name: High Speed Downlink Packet Access, abbreviation: HSDPA).
  • W-CDMA Wideband Code Division Multiple Access
  • HSDPA High Speed Downlink Packet Access
  • the communication module is used to control communication of components in the UE, and can support direct memory access (English full name: Direct Memory Access).
  • the input unit 202 is used for receiving and transmitting signals during information transmission or reception or during a call. For example, after the downlink information of the base station is received, it is processed by the processing unit 204; in addition, the data designed for the uplink is transmitted to the base station. For example, after the information transmitted by the external device is received, the processing unit 204 processes the result, and the processing result is transmitted to the external device.
  • the input unit 202 includes well-known circuitry for performing these functions, Including but not limited to antenna systems, radio frequency transceivers, one or more amplifiers, tuners, one or more oscillators, digital signal processors, codec chipsets, subscriber identity module (SIM) cards, memories, etc. Wait.
  • the input unit 202 can also communicate with the network and other devices through wireless communication.
  • the wireless communication may use any communication standard or protocol, including but not limited to the global mobile communication system (English name: Global System of Mobile communication, abbreviation: GSM), general packet radio service (English full name: General Packet Radio Service, abbreviation : GPRS), Code Division Multiple Access (English full name: Code Division Multiple Access, abbreviation: CDMA), Wideband Code Division Multiple Access (WCDMA), high-speed uplink packet access Technology (English full name: High Speed Uplink Packet Access, abbreviation: HSUPA), long-term evolution (English full name: Long Term Evolution, abbreviation: LTE), e-mail, short message service (English full name: Short Messaging Service, abbreviation: SMS), etc. .
  • GSM Global System of Mobile communication
  • GPRS General Packet Radio Service
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • HSUPA High Speed Uplink Packet Access
  • the output unit 203 includes, but is not limited to, an image output unit and a sound output unit.
  • the image output unit is used to output text, pictures, and/or video.
  • the image output unit may include a display panel, for example, a liquid crystal display (English name: Liquid Crystal Display, abbreviated: LCD), an organic light emitting diode (English name: Organic Light-Emitting Diode, OLED), a field emission display (English) Full name: field emission display, abbreviation: FED) and other forms of display panels.
  • the image output unit may comprise a reflective display, such as an electrophoretic display, or a display utilizing an Interferometric Modulation of Light.
  • the image output unit may comprise a single display or multiple displays of different sizes.
  • the touch panel used by the input unit 202 can also serve as the display panel of the output unit 203 at the same time. For example, when the touch panel detects a touch or proximity gesture operation thereon, it is transmitted to the processing unit to determine the type of the touch event, and then the processing unit provides a corresponding visual output on the display panel according to the type of the touch event.
  • the input unit 202 and the output unit 203 are two independent components to implement the input and output functions of the UE, in some embodiments, the touch panel and the display panel may be integrated to implement the UE. Input and output functions.
  • the image output unit can display various graphical user interfaces (English name: Graphical User Interface, abbreviated as GUI) as virtual control components, including but not limited to windows, scrolling axes, icons, and scrapbooks. The user operates by touch.
  • GUI Graphical User Interface
  • the image output unit includes a filter and an amplifier for filtering and placing the video output by the processing unit 204.
  • the audio output unit includes a digital to analog converter for converting the audio signal output by the processing unit 204 from a digital format to an analog format.
  • the storage unit 205 can be used to store software programs and modules, and the processing unit 204 executes various functional applications of the UE and implements data processing by running software programs and modules stored in the storage units.
  • the storage unit mainly includes a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function, such as a sound playing program, an image playing program, and the like; and the data storage area can be stored according to the UE. Use the created data (such as audio data, phone book, etc.).
  • the storage unit 205 may include a volatile memory, such as a non-volatile dynamic random access memory (Nonvolatile Random Access Memory, NVRAM), phase change random access memory (English full name) :Phase Change RAM, abbreviation: PRAM), magnetoresistive random access memory (English name: Magetoresistive RAM, abbreviation: MRAM), etc., may also include non-volatile memory, such as at least one disk storage device, electronically erasable Programmable read-only memory (English full name: Electrically Erasable Programmable Read-Only Memory, EEPROM), flash memory devices, such as NOR flash memory or NAND flash memory.
  • NVRAM non-volatile dynamic random access memory
  • PRAM Phase Change RAM
  • MRAM magnetoresistive random access memory
  • MRAM magnetoresistive random access memory
  • EEPROM electronically erasable Programmable read-only memory
  • flash memory devices such as NOR flash memory or NAND flash memory.
  • the non-volatile memory stores an operating system, an application, and the like executed by the processing unit 104.
  • the processing unit 204 loads the running program and data from the non-volatile memory into the memory and stores the digital content in a plurality of storage devices.
  • the operating system includes various components and/or drivers for controlling and managing conventional system tasks such as memory management, storage device control, power management, and the like, as well as facilitating communication between various hardware and software.
  • the operating system may be an Android system of Google Inc., an iOS system developed by Apple Corporation, a Windows operating system developed by Microsoft Corporation, or an embedded operating system such as Vxworks.
  • the application includes any application installed on the UE, including but not limited to browser, email, instant messaging service, word processing, keyboard virtual, widget, encryption, digital rights management, voice recognition, voice Copy, locate (such as those provided by GPS), music playback, and more.
  • the structure of the UE shown in FIG. 2 does not constitute a limitation of the present invention, and it may be a bus-shaped structure or a star-shaped structure, and may include more than the illustration. Or fewer parts, or combine some parts, or different parts.
  • the UE in the embodiment of the present invention includes but is not limited to a mobile phone, a mobile computer, a tablet computer, and a personal digital assistant (English) Full name: Personal Digital Assistant, abbreviation: PDA), media player, smart TV, wearable devices (for example, smart watches or smart glasses, etc.) and combinations of two or more of the above.
  • the scenario applied by the technical solution of the present invention will be introduced first, and the downlink of the LAA is mainly in the third generation partner project (English name: the 3rd Generation Partner Project, abbreviation: 3GPP) REL.
  • 3GPP Third Generation Partner Project
  • Communication research, the current REL.14 eLAA mainly to study the uplink communication of LAA, mainly including channel access method, channel design and reference channel design.
  • 3GPP REL. 13 four downlink channel access schemes are defined.
  • the first one is: LBT is transmitted without any LBT; the second is LBT without random backoff mechanism; the third is LBT with random backoff mechanism and the size of competition window is unchanged; The four types are LBTs with a random backoff mechanism and a change in the size of the contention window.
  • no associated channel access scheme is defined for the uplink channel access of the LAA.
  • the related uplink channel access mechanisms and schemes are defined, thereby solving the access problem of the uplink channel.
  • FIG. 3 is a schematic diagram of an embodiment of an uplink channel access method according to an embodiment of the present invention. The method is applied to an authorized auxiliary access LAA system. The specific process of the method embodiment is as follows:
  • Step 301 The base station determines an uplink data scheduling mode, where the uplink data scheduling mode includes cross-carrier scheduling and/or self-scheduling.
  • the uplink data scheduling mode determined by the base station is generally two types, that is, cross-carrier scheduling and self-scheduling, wherein the self-scheduling is the downlink control information of the carrier, and the uplink data of the carrier is scheduled, and the cross-carrier scheduling refers to The downlink control information of the carrier schedules uplink data of other carriers.
  • Step 302 The base station sends the determined uplink data scheduling manner to the user equipment UE.
  • the base station sends the determined cross-carrier scheduling and/or self-scheduling mode to the UE, where, when the base station determines that the uplink data scheduling mode is the cross-carrier scheduling, the UE accesses the first mode.
  • An uplink channel where the first mode includes a first parameter, the first parameter is an uplink channel access parameter configured by the base station for the UE, and when the base station determines the uplink data scheduling mode
  • the UE accesses the uplink channel in a second manner, where the second mode is an LBT mode in which there is no random backoff mechanism.
  • Step 303 The UE receives an uplink data scheduling manner sent by the base station.
  • the UE receives the uplink data scheduling mode sent by the base station, that is, cross-carrier scheduling and/or self-scheduling.
  • Step 304 When the uplink data scheduling mode is cross-carrier scheduling, the UE accesses the uplink channel by using a first mode.
  • the UE since the UL-grant scheduling information is sent by the base station to the UE through other carriers, the UE does not know the unlicensed carrier channel state for transmitting the uplink data, The UE needs to use the first mode to preempt the uplink channel to ensure fair access to the uplink channel with other nodes.
  • the first mode includes a first parameter, where the first parameter is an uplink channel access parameter configured by the base station for the UE.
  • the first parameter includes a random backoff counter and/or a contention window size, wherein values of the random backoff counter and/or contention window size are configured by the base station.
  • the UE accessing the uplink channel by using the first mode includes: performing, by the UE, channel detection on the uplink channel, when the UE detects that the uplink channel is occupied, Perform random backoff, that is, obtain the N value of the random backoff counter configured by the base station (N is an integer greater than 0), and each time an idle time slot is detected, the value of the random backoff counter is decremented by 1, when it is reduced from N to 0. Then, the defer duration of the uplink channel is detected, and when the defer duration is idle, the uplink channel is accessed.
  • the content of the contention window (English name: Contend Window Size, abbreviated as CWS) and the random back-off counter are all configurable parameters.
  • CWS Contend Window Size
  • the base station determines the self-determination.
  • the parameters are not determined by the UE, and are configured by the base station.
  • the base station uniformly configures the CWS and random back-off counter values of all scheduled UEs when multiple UEs perform multiplex transmission, thereby ensuring that all scheduled UEs can simultaneously access the uplink channel. . If the parameters are generated by the UE, the randomness is very large. For a scenario where multiple UEs are multiplexed, it is difficult to control all scheduled UEs to access the uplink channel at the same time.
  • the random backoff counter is configured by the base station by using a radio resource control RRC, where the RRC includes configuration information of the random backoff count; or the random backoff counter is
  • the base station is configured by using a physical downlink control channel PDCCH, where the PDCCH includes a first information for indicating configuration information of the random backoff counter. Bit information.
  • the first bit information may be determined according to an actual situation.
  • the first bit information is 4 bits, which is not specifically limited herein.
  • the priority of the uplink channel access is defined in REL.13, and the parameters of the LBT in different priorities are defined, as shown in Table 1 below:
  • the value range of CWS is different, CW min, p is the CWS minimum value, CW max, p is the CWS maximum value, T mcot, p is the channel occupation time, and is also given in Table 1.
  • the allowed CW p sizes which is the range of values for CWS, includes all possible CWS values.
  • the CWS may be configured by the base station by using a radio resource control (English name: Radio Resource Control, abbreviation: RRC), where the RRC includes configuration information of the contention window size, that is, in the RRC. Increase the correlation coefficient, for example: Rel.14 contention window configuration parameter (rel-14-cws-configuration), and then semi-static configuration to the UE. When the UE preempts the uplink channel, adjust the contention window according to the coefficient; or, CWS also
  • the eNB may be configured by using a physical downlink control channel (English name: Physical Downlink Control Channel, abbreviated as PDCCH), where the PDCCH includes second bit information for indicating configuration information of the contention window size, as follows: As shown in FIG.
  • PDCCH Physical Downlink Control Channel
  • 4 bits are added to the UL-Grant scheduling information of the PDCCH to indicate a specific configuration of the CWS, and the UE acquires the CWS from the UL-grant scheduling information.
  • the specific configuration is as follows: when the bit is 0011, the value of the CWS is 31, and when the UE preempts the uplink channel, the contention window is adjusted according to the value of the CWS.
  • how the base station selects the CWS of the uplink LBT by the UE is not limited herein.
  • different UEs report the surrounding channel status to the base station, and the base station selects a CWS suitable for the UE according to the channel status report reported by the UE. value.
  • the value of the random back-off counter in the present invention may also be generated by the base station and dynamically configured to the UE by using the PDCCH, and the corresponding bit is added in the UL grant scheduling information to indicate the value of the parameter Random back-off counter.
  • the value of the random back-off counter may also be semi-statically configured by the base station through RRC.
  • the base station adds a corresponding number of bits in the UL-grant scheduling information to indicate the value of the random back-off counter. For example, when the value of CWS is 7, the corresponding 4 bits are 0001, and then the bit needs to be increased by 3 bits to indicate the value of the random back-off counter.
  • the UE obtains the values of the CWS and the random back-off counter from the UL-grant scheduling information or the RRC, and uses these parameters to perform the LBT to access the uplink channel.
  • Step 305 When the uplink data scheduling mode is self-scheduling, the UE accesses the uplink channel by using a second mode.
  • the UE accessing the uplink channel by using the second mode includes: detecting, by the UE, the uplink channel; when the UE detects that the idle time corresponding to the uplink channel is greater than When the threshold is reached, the uplink channel is accessed, where the first threshold is configured by the base station, for example, the first threshold is 25 microseconds.
  • downlink control information is already transmitted on the local carrier before the UE sends uplink data to the base station, that is, the base station has preempted the unlicensed carrier, and therefore, in a short time (The state of the uplink channel is relatively stable, and the UE accesses the uplink channel in the second mode, and sends the uplink data to the base station through the uplink channel.
  • step 305 is performed first, and then step 304 is performed.
  • FIG. 5 a schematic diagram of a structure of the UE 500 in the embodiment of the present invention, the UE 500 is applied to an authorized auxiliary access LAA system, and the UE 500 includes: a receiving module 501, a first access module 502, and a second access module 503. .
  • the receiving module 501 is configured to receive an uplink data scheduling manner sent by the base station, where the uplink data scheduling manner includes cross-carrier scheduling and/or self-scheduling.
  • the first access module 502 is configured to: when the receiving module 501 receives the uplink data scheduling mode sent by the base station, the uplink channel is accessed by using the first mode, where the first mode includes the first a parameter, the first parameter is an uplink channel access parameter configured by the base station for the UE;
  • the second access module 503 is configured to: when the receiving module 501 receives the uplink data scheduling mode sent by the base station as the self-scheduling, accessing the uplink channel by using the second mode, where the second mode is that there is no random backoff mechanism. After listening to the LBT method.
  • the first parameter includes a random backoff counter and/or a contention window size, wherein values of the random backoff counter and/or contention window size are configured by the base station.
  • the random backoff counter is configured by the base station by using a radio resource control RRC, where the RRC includes configuration information of the random backoff count; or the random backoff counter.
  • the base station is configured by using a physical downlink control channel PDCCH, where the PDCCH includes first bit information for indicating configuration information of the random backoff counter.
  • the contention window size is performed by the base station by using an RRC. Configuring, wherein the RRC includes configuration information of the contention window size; or the contention window size is configured by the base station by using a PDCCH, where the PDCCH includes a contention window for indicating Second bit information of the size of the configuration information.
  • the first access module 502 is specifically configured to perform spatial channel assessment CCA detection on the uplink channel, and when detecting that the uplink channel is idle, access the uplink channel.
  • a random backoff mechanism is performed, that is, the N value of the random backoff counter configured by the base station is acquired (N is an integer greater than 0), and a random backoff counter is detected every time an idle time slot is detected. The value is decremented by 1.
  • the defer duration is idle, the defer duration of the uplink channel is detected.
  • the defer duration is idle, the uplink channel is accessed.
  • the UE when the uplink data scheduling mode determined by the base station is the cross-carrier scheduling, the UE first detects the uplink channel before the UE accesses the uplink channel, and accesses the uplink channel when the UE detects that the uplink channel is idle. And transmitting the uplink data to the base station by using the uplink channel.
  • the UE detects that the uplink channel is occupied, the UE does not directly access the uplink channel, but performs random backoff and accesses the uplink channel, thereby avoiding the uplink channel.
  • the UE cannot normally send the uplink data to the base station through the uplink channel.
  • the second access module 503 is specifically configured to detect the uplink channel, and when detecting that the idle time corresponding to the uplink channel is greater than a first threshold, accessing the An uplink channel, wherein the first threshold is configured by the base station.
  • the second access module only needs to detect the uplink channel, and the operation is simple.
  • detecting that the idle time corresponding to the uplink channel is greater than the first threshold detecting the uplink channel, directly accessing the uplink channel, and sending the uplink data to the base station by using the uplink channel, where the first The threshold is configured by the base station according to actual conditions, for example, 25 microseconds, which is not specifically limited herein.
  • the first access module accesses the uplink channel by using the first mode
  • the second The access module accesses the uplink channel in a second manner, thereby solving the uplink channel access problem in the LAA system.
  • the first parameter included in the first mode is an uplink channel access parameter configured by the base station for the UE, instead of being configured by the UE, so that multiple UEs can be simultaneously accessed to the uplink channel, thereby improving the utilization of the uplink channel. , effectively use communication resources.
  • the receiving module 501, the first access module 502, and the second access module 503 can be software modules, can be executed in a processor of the computer system, or can be a specific integrated circuit. No specific restrictions are made.
  • the above-mentioned and other operations and/or functions of the receiving module 501, the first accessing module 502, and the second accessing module 503 are respectively implemented in order to implement the corresponding processes of the method shown in FIG. 3, and are not described herein again for brevity.
  • FIG. 6 a schematic diagram of an embodiment of a base station 600 in the embodiment of the present invention is applied to an LAA system, where the base station includes a determining module 601 and a sending module 602.
  • the determining module 601 is configured to determine an uplink data scheduling manner, where the uplink data scheduling manner includes cross-carrier scheduling and/or self-scheduling;
  • the sending module 602 is configured to send the uplink data scheduling manner determined by the determining module 601 to the user equipment UE, where, when the base station determines that the uplink data scheduling mode is the cross-carrier scheduling, the UE Accessing the uplink channel by using the first mode, where the first mode includes a first parameter, where the first parameter is an uplink channel access parameter configured by the base station for the UE; When the uplink data scheduling mode is determined as the self-scheduling, the UE accesses the uplink channel by using a second mode, where the second mode is an LBT mode without a random backoff mechanism.
  • the base station first determines the uplink data scheduling mode for scheduling the uplink data to the UE, and sends the corresponding uplink data scheduling mode to the UE, so that the UE selects the corresponding uplink data scheduling mode to access the uplink channel, and sends the uplink data to the base station.
  • the uplink channel access problem in the LAA system is solved.
  • the first parameter includes a random backoff counter and/or a contention window size, wherein values of the random backoff counter and/or contention window size are configured by the base station.
  • the random backoff counter is configured by the base station by using a radio resource control RRC, where the RRC includes configuration information of the random backoff count; or the random backoff counter.
  • the base station is configured by using a physical downlink control channel PDCCH, where the PDCCH includes first bit information for indicating configuration information of the random backoff counter.
  • the contention window size is performed by the base station by using an RRC. Configuring, wherein the RRC includes configuration information of the contention window size; or the contention window size is configured by the base station by using a PDCCH, where the PDCCH includes a contention window for indicating Second bit information of the size of the configuration information.
  • the random backoff counter and the contention window size are uniformly configured by the base station, and multiple UEs can be guaranteed to access the channel at the same time, thereby improving the utilization of the uplink channel and effectively utilizing the communication resources.
  • the base station may perform the semi-static configuration of the random backoff counter and the contention window size through the RRC, or the base station may dynamically configure the random backoff counter and the contention window size through the PDCCH, which is not specifically limited herein.
  • the determining module 601 can be executed in a processor of the computer system, or can be a specific integrated circuit, which is not specifically limited herein.
  • the above-mentioned and other operations and/or functions of the module 601 are respectively determined to implement the corresponding processes of the method shown in FIG. 3, and are not described herein for brevity.
  • FIG. 5 illustrates the specific structure of the UE from the perspective of the function module.
  • the specific structure of the UE is described from the hardware point of view below with reference to the embodiment of FIG. 7:
  • FIG. 7 another schematic structural diagram of a UE 700 in an embodiment of the present invention includes one or more processors 701, a memory 702, a bus system 703, and a transceiver 704, the processor 701, the memory 702, and The transceiver 704 is coupled through the bus system 703, which stores one or more programs 705, the one or more programs 705 including instructions that, when executed by the UE 700, cause The UE 700 performs the method as shown in the embodiment of FIG.
  • the processor 701 may be a CPU, and the processor 701 may also be other general purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), off-the-shelf programmable gate arrays (FPGAs), or the like. Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and more.
  • the general purpose processor may be a microprocessor, or the processor may be any conventional processor or the like.
  • the step of performing uplink channel access by the UE may be completed by using an integrated logic circuit of the hardware in the processor 701 or an instruction in a software form, which may be directly implemented by the hardware processor, or by using hardware in the processor. And the combination of software modules is completed.
  • the software module 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 702, and the processor 701 reads the information in the memory 702 and completes the steps of the above method in combination with its hardware. To avoid duplication, It will not be described in detail here.
  • the UE shown in FIG. 7 may correspond to the UE in the method of uplink channel access in the embodiment of the present invention, and the foregoing and other operations and/or functions of each unit in the UE are respectively implemented in FIG. 3 .
  • the corresponding flow of the method shown is not repeated here for the sake of brevity.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of cells is only a logical function division.
  • multiple units or components may be combined or integrated. Go to another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units.
  • the technical solutions provided in this embodiment may be implemented by selecting some or all of the units according to actual needs.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • An integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, can be stored in a computer readable storage medium.
  • the technical solution of the present invention which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium.
  • a computer device which can be a personal computer, a server, or The network device or the like
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like.

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

Abstract

Conformément à des modes de réalisation, la présente invention concerne un procédé d'accès à un canal de liaison montante et un équipement utilisateur (UE), destinés à être utilisés pour résoudre le problème d'accès à un canal de liaison montante dans un système à accès assisté par licence (LAA). Le procédé s'applique à un système LAA, et comprend les opérations suivantes : un UE reçoit un mode de planification de données de liaison montante envoyé par un station de base, le mode de planification de données de liaison montante comprenant une planification inter-porteuses et une auto-planification; l'UE accède à un canal de liaison montante par un premier mode lorsque le mode de planification de données de liaison montante est un mode de planification inter-porteuses, le premier mode comprenant un premier paramètre qui est un paramètre d'accès à un canal de liaison montante configuré pour l'UE par la station de base; l'UE accède au canal de liaison montante par un second mode lorsque le mode de planification de données de liaison montante est un mode d'auto-planification, le second mode étant un mode d'accès multiple avec écoute de porteuse (LBT) n'ayant pas de mécanisme de réduction de puissance aléatoire.
PCT/CN2016/077986 2016-03-31 2016-03-31 Procédé d'accès à un canal de liaison montante et dispositif associé Ceased WO2017166162A1 (fr)

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CN201680081376.7A CN108605341B (zh) 2016-03-31 2016-03-31 一种上行信道接入方法及相关设备
PCT/CN2016/077986 WO2017166162A1 (fr) 2016-03-31 2016-03-31 Procédé d'accès à un canal de liaison montante et dispositif associé

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