WO2016184365A1 - Procédé, appareil, dispositif et système de programmation de liaison montante - Google Patents

Procédé, appareil, dispositif et système de programmation de liaison montante Download PDF

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Publication number
WO2016184365A1
WO2016184365A1 PCT/CN2016/082034 CN2016082034W WO2016184365A1 WO 2016184365 A1 WO2016184365 A1 WO 2016184365A1 CN 2016082034 W CN2016082034 W CN 2016082034W WO 2016184365 A1 WO2016184365 A1 WO 2016184365A1
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Prior art keywords
resource
scheduling information
subframe
resource scheduling
base station
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PCT/CN2016/082034
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English (en)
Chinese (zh)
Inventor
柯颋
童辉
刘建军
沈晓冬
侯雪颖
王锐
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中国移动通信集团公司
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Publication of WO2016184365A1 publication Critical patent/WO2016184365A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network

Definitions

  • the present disclosure relates to the field of network communication technologies, and in particular, to an uplink scheduling method, apparatus, device, and system.
  • LTE Long Term Evolution
  • U-band unlicensed bands
  • LBT listen before talk
  • CCA Clear Channel Assessment
  • the licensed frequency band (L-band) can be used to assist the unlicensed frequency band for service transmission, and the reliability of the licensed frequency band is combined with the bandwidth resources of the unlicensed frequency band to ensure the service transmission. Improve system throughput while reliability.
  • the protocol in the related art requires carrier aggregation (CA) or dual connectivity to use the LTE technology in the unlicensed frequency band.
  • CA carrier aggregation
  • the carrier on the licensed band is used as the primary carrier
  • the carrier on the unlicensed band is used as the secondary carrier to implement the unlicensed band access mode assisted by the licensed band, that is, the licensed access (Licensed Assisted Access, LAA).
  • the UE When the user equipment (User Equipment, UE) is allowed to transmit uplink data on the U-band, the UE also needs to comply with the LBT specification. Therefore, the uplink transmission of the UE on the U-band is an opportunity transmission, and That is to say, after the UE is scheduled, the UE does not necessarily compete for channel access opportunities every time.
  • the user equipment User Equipment, UE
  • the uplink transmission of the UE on the U-band is an opportunity transmission, and That is to say, after the UE is scheduled, the UE does not necessarily compete for channel access opportunities every time.
  • the UL resource of the UE is allocated in advance by an evolved Node B (eNB).
  • eNB evolved Node B
  • the eNB sends the UL resource scheduling information to the UE (for example, at the subframe n)
  • Competing for channel access opportunities If the UE fails to successfully contend for the channel access opportunity at subframe n+k, the UL resource scheduling information transmitted at subframe n will be invalidated due to the failure, which will result in unnecessary scheduling signaling overhead. This will result in waste of UL resources allocated by the eNB for the UE.
  • the eNB needs to continuously allocate UL resources to the UE, and send UL resource scheduling information in the Physical Downlink Control Channel (PDCCH) for the eNB. In other words, it will cause a large scheduling signaling overhead and waste of scheduling signaling.
  • PDCCH Physical Downlink Control Channel
  • the embodiments of the present disclosure provide an uplink scheduling method, apparatus, device, and system, which may be used to solve the problem that an uplink scheduling mechanism of a communication system (such as an LTE system) in an unlicensed frequency band may cause a large network side. Scheduling signaling overhead and scheduling signaling waste.
  • a communication system such as an LTE system
  • the first aspect provides an uplink scheduling method, including:
  • the UL resource indicated by the UL resource scheduling information is released.
  • the UL resource indicated by the UL resource scheduling information is released when the UE is determined to use the UL resource to perform uplink transmission, and the method includes:
  • blind detection on the UL resource indicated by the UL resource scheduling information is Whether there is a demodulation reference signal sent by the UE; when it is detected that the demodulation reference signal is present, determining that the UE performs uplink transmission by using the UL resource, and releasing the UL resource indicated by the UL resource scheduling information ;or
  • the releasing, by the second subframe, the UL resource indicated by the UL resource scheduling information when the UL resource scheduling information is invalid specifically includes:
  • the bearer mode of the UL resource scheduling information in the frequency domain is any one of the following manners:
  • the bearer is carried on other unlicensed frequency bands that are different from the UL resource indicated by the UL resource scheduling information.
  • the sending, by the base station, the UL resource scheduling information to the UE in the first subframe specifically includes:
  • the base station sends the UL resource scheduling information to the UE in the first subframe, where the UL resource scheduling information includes: a total number N of schedulable subframes and a first UL resource scheduling parameter; the N characterizes that the UE is utilizing When the UL resource performs uplink transmission, the N UL subframes may be scheduled at the same time, where the N is an integer greater than or equal to 1; the first UL resource scheduling parameter is used by the UE to perform uplink transmission by using the UL resource. Configuration parameters for each UL subframe used.
  • the sending, by the base station, the UL resource scheduling information to the UE in the first subframe specifically includes:
  • the base station sends at least one piece of UL resource scheduling information to the UE, and the last piece of the UL resource scheduling information in the at least one piece of the UL resource scheduling information is sent in the first subframe, where each UL resource scheduling information includes: The subframe sequence number n, the second UL resource scheduling parameter, and the total number of schedulable subframes N; wherein the N characterizes that the UE can simultaneously schedule N UL subframes when performing uplink transmission by using the UL resource
  • the N is an integer greater than or equal to 1;
  • the n characterizes an arrangement sequence number of the currently scheduled UL subframe in the N UL subframes that can be simultaneously scheduled when the UE performs uplink transmission by using the UL resource,
  • the value of n is in the range of 0 to N-1, and the value of the n is sequentially incremented according to the sending order of the UL resource scheduling information;
  • the second UL resource scheduling parameter is that the UE can be simultaneously scheduled.
  • the second aspect provides an uplink scheduling method, including:
  • the user equipment UE receives uplink UL resource scheduling information sent by the base station in the first subframe;
  • the contending for the channel access opportunity from the second subframe until the UL resource indicated by the UL resource scheduling information is invalid specifically includes:
  • the competition is stopped.
  • Channel access opportunity wherein the time period is the second subframe to the third subframe a second delay between the second subframe and the third subframe; or
  • the UE When the UE starts to contend for a channel access opportunity from the second subframe, if the UE receives the resource failure information sent by the base station, determining that the UL resource scheduling information is invalid, and stopping the contention channel access opportunity; or
  • the UE When the UE starts to contend for the channel access opportunity from the second subframe, if the UE receives the new UL resource scheduling information sent by the base station, it determines that the UL resource scheduling information is invalid, and stops the contention channel connection. An entry opportunity, where the UL resource indicated by the new UL resource scheduling information is that the base station re-allocates the UE.
  • the method further includes:
  • uplink transmission is performed by using the UL resource indicated by the UL resource scheduling information.
  • the receiving, by the UE, the UL resource scheduling information sent by the base station in the first subframe specifically includes:
  • the UE receives the UL resource scheduling information that is sent by the base station in the first subframe, where the UL resource scheduling information includes: a total number of schedulable subframes N and a first UL resource scheduling parameter; the total number of the schedulable subframes
  • the number N indicates that the UE may simultaneously schedule N UL subframes when the uplink resource is transmitted by using the UL resource, where the N is an integer greater than or equal to 1; the first UL resource scheduling parameter is used by the UE. a configuration parameter of each UL subframe used when the UL resource performs uplink transmission;
  • the uplink resource is transmitted by using the UL resource indicated by the UL resource scheduling information, and specifically includes:
  • the uplink transmission is performed on the N UL subframes from the time of successful competition to the channel access opportunity according to the first UL resource scheduling parameter.
  • the receiving, by the UE, the UL resource scheduling information sent by the base station in the first subframe specifically includes:
  • each of the UL resource scheduling information includes: The N-arrangement sequence number n, the second UL resource scheduling parameter, and the total number of schedulable subframes N; wherein the N characterizes that the UE can simultaneously schedule N ULs when performing uplink transmission by using the UL resource In the subframe, the N is an integer greater than or equal to 1; the n characterizes the arrangement of the currently scheduled UL subframe in the N UL subframes that can be simultaneously scheduled when the UE performs uplink transmission by using the UL resource.
  • the values of the UL subframe scheduling information are sequentially incremented according to the sending order of the UL resource scheduling information.
  • the second UL resource scheduling parameter is configured for the UL subframe corresponding to the n in the N UL subframes that the UE can simultaneously schedule. Parameter;
  • the uplink resource is transmitted by using the UL resource indicated by the UL resource scheduling information, and specifically includes:
  • the second UL resource scheduling parameter corresponding to the n is sequentially used according to the sequence of n from small to large in each received UL resource scheduling information, in the slave Successfully compete for uplink transmission on N UL subframes from the channel access opportunity.
  • the third aspect provides an uplink scheduling apparatus, including:
  • a UL resource scheduling information sending unit configured to send uplink UL resource scheduling information to the user equipment UE in the first subframe, to indicate that the UE starts to compete for channel access opportunities from the second subframe, and successfully competes to The UL resource indicated by the UL resource scheduling information is used when the channel access opportunity is used; wherein, the first time delay exists between the first subframe and the second subframe;
  • a UL resource scheduling information release unit configured to release the UL resource when the UE is determined to use the UL resource for uplink transmission or the UL resource scheduling information is invalid from the second subframe The UL resource indicated by the scheduling information.
  • the UL resource scheduling information release unit is specifically configured to:
  • the UL resource scheduling information release unit is specifically configured to:
  • the bearer mode of the UL resource scheduling information in the frequency domain is any one of the following manners:
  • the bearer is carried on other unlicensed frequency bands that are different from the UL resource indicated by the UL resource scheduling information.
  • the UL resource scheduling information sending unit is specifically configured to:
  • the UL resource scheduling information includes: a total number N of schedulable subframes and a first UL resource scheduling parameter;
  • the N UL subframes may be scheduled at the same time, where the N is an integer greater than or equal to 1;
  • the first UL resource scheduling parameter is used by the UE to perform uplink transmission by using the UL resource. Configuration parameters for each UL subframe.
  • the UL resource scheduling information sending unit is specifically configured to:
  • each UL resource scheduling information includes: a schedulable sub Frame arrangement sequence number n, second UL resource scheduling parameters, and schedulable subframes a total number N; wherein the N characterizes that the UE may simultaneously schedule N UL subframes when the uplink resource is transmitted by using the UL resource, where N is an integer greater than or equal to 1;
  • the sequence number of the currently scheduled UL subframe in the N UL subframes that can be simultaneously scheduled the range of n ranges from 0 to N-1, and the The value of n is sequentially incremented according to the sending order of the UL resource scheduling information;
  • the second UL resource scheduling parameter is the N UL subframes that can be simultaneously scheduled by the UE, and the corresponding UL subframe of the n Configuration
  • the fourth aspect provides an uplink scheduling apparatus, including:
  • a UL resource scheduling information receiving unit configured to receive uplink UL resource scheduling information sent by the base station in the first subframe
  • a competing unit configured to contend for a channel access opportunity from the second subframe until the UE successfully accesses the channel access opportunity or the UL resource failure indicated by the UL resource scheduling information; wherein the first subframe and the There is a first delay between the second subframes.
  • the competition unit is specifically configured to:
  • the channel access opportunity When the channel access opportunity is contending from the second subframe, if the channel access opportunity is not successfully contending in the preset time period, it is determined that the UL resource scheduling information is invalid, and the contention channel access opportunity is stopped;
  • the time period is the second subframe to the third subframe, and the second subframe has a second delay between the second subframe and the third subframe; or
  • the contention channel access opportunity is started from the second subframe, if the resource failure information sent by the base station is received, it is determined that the UL resource scheduling information is invalid, and the contention channel access opportunity is stopped; or
  • the new UL resource scheduling information sent by the base station is received, it is determined that the UL resource scheduling information is invalid, and the contention channel access opportunity is stopped; The UL resource indicated by the new UL resource scheduling information is re-allocated by the base station.
  • the device further comprises:
  • a transmitting unit configured to perform uplink transmission by using the UL resource indicated by the UL resource scheduling information when successfully competing for a channel access opportunity.
  • the UL resource scheduling information receiving unit is specifically configured to:
  • the UL resource scheduling information includes: a total number of schedulable subframes N and a first UL resource scheduling parameter; the total number of the schedulable subframes N indicates that the UE can simultaneously schedule N when performing uplink transmission by using the UL resources.
  • a UL subframe the N is an integer greater than or equal to 1;
  • the first UL resource scheduling parameter is a configuration parameter of each UL subframe used by the UE to perform uplink transmission by using the UL resource;
  • the transmission unit is specifically configured to:
  • the uplink transmission is performed on the N UL subframes from the time of successful competition to the channel access opportunity according to the first UL resource scheduling parameter.
  • the UL resource scheduling information receiving unit is specifically configured to:
  • each of the UL resource scheduling information includes: The N-arrangement sequence number n, the second UL resource scheduling parameter, and the total number of schedulable subframes N; wherein the N characterizes that the UE can simultaneously schedule N ULs when performing uplink transmission by using the UL resource In the subframe, the N is an integer greater than or equal to 1; the n characterizes the arrangement of the currently scheduled UL subframe in the N UL subframes that can be simultaneously scheduled when the UE performs uplink transmission by using the UL resource.
  • the value of the n is in the range of 0 to N-1, and the value of the n is sequentially incremented according to the sending order of the UL resource scheduling information;
  • the second UL resource scheduling parameter is The configuration parameters of the UL subframe corresponding to the n in the N UL subframes that are simultaneously scheduled;
  • the transmission unit is specifically configured to:
  • the second UL resource scheduling parameter corresponding to the n is sequentially used according to the sequence of n from small to large in each received UL resource scheduling information, from successful competition to Uplink transmission is performed on N UL subframes from the channel access opportunity.
  • a fifth aspect provides a base station device, comprising the uplink scheduling apparatus according to any one of the foregoing third aspects.
  • a sixth aspect provides a user equipment, including the uplink scheduling apparatus of any of the fourth aspects.
  • the seventh aspect provides an uplink scheduling system, including: the foregoing base station and the foregoing user equipment.
  • the base station sends UL resource scheduling information to the UE in the first subframe to instruct the UE to start competing for channel access opportunities from the second subframe, and successfully compete for channel access opportunities. And using the UL resource indicated by the UL resource scheduling information, and determining, from the second subframe, whether the UE uses the UL resource for uplink transmission, or determining whether the UL resource scheduling information is invalid, and determining that the UE uses the UL resource to perform uplink When the transmission or the foregoing UL resource scheduling information is invalid, the UL resource indicated by the UL resource scheduling information is released.
  • the base station reserves the UL resource indicated by the UL resource scheduling information for the UE from the second subframe until the UE uses the UL resource for uplink transmission or the UL resource scheduling information fails, and the above-mentioned “reservation” It is not said that the base station can no longer schedule other UEs on the reserved UL resources, but the base station can guarantee that the UE is on the reserved UL resources once it contends for the channel access opportunity from the second subframe.
  • the uplink scheduling mechanism proposed in the present disclosure can save the base station a large amount of scheduling signaling overhead without causing waste of scheduling signaling.
  • FIG. 1 is a flowchart of implementing an uplink scheduling method implemented by a network side according to an embodiment of the present disclosure
  • FIG. 2 is a flowchart of implementing an uplink scheduling method implemented by a terminal side according to an embodiment of the present disclosure
  • 3 is a schematic diagram of single subframe scheduling
  • FIG. 4 is a flowchart of implementing another uplink scheduling method implemented by a network side according to an embodiment of the present disclosure
  • FIG. 5 is a schematic diagram of multi-subframe scheduling
  • FIG. 6 is a flowchart of implementing another uplink scheduling method implemented by a network side according to an embodiment of the present disclosure
  • FIG. 7 is a flowchart of an implementation of an uplink scheduling method implemented by a terminal side according to an embodiment of the present disclosure
  • FIG. 8 is a flowchart of an implementation of an uplink scheduling method implemented by a terminal side according to an embodiment of the present disclosure
  • FIG. 9 is a schematic structural diagram of a first uplink scheduling apparatus according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a second uplink scheduling apparatus according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of an uplink scheduling system according to an embodiment of the present disclosure.
  • the uplink scheduling mechanism in the related art is studied in detail.
  • the uplink scheduling process of the LTE in the related art is as follows:
  • the eNB centrally allocates UL resources for all served UEs
  • the eNB notifies the relevant UE to the UL resource scheduling information through the PDCCH;
  • DCI Downlink Control Information
  • the DCI format carrying the UL resource scheduling information is DCI format 0 or DCI format 4;
  • Resource block assignment and hopping resource allocation used to indicate frequency domain location information of the UL resource
  • DCI format 0/4 There are many other fields in DCI format 0/4, some of which include:
  • Modulation and coding scheme and redundancy version used to indicate modulation, coding mode, and redundant retransmission version information
  • a TPC command for scheduled PUSCH configured to indicate transmission power control information
  • the field (2bit) exists only when the uplink and downlink subframe matching mode in the Time Division Duplexing (TDD) system is 0, and is used to support scheduling of more than one UL subframe.
  • TDD Time Division Duplexing
  • the time domain subframe position of the UL resource indicated by the UL resource scheduling information is determined by an implicit rule, where:
  • the UE When the eNB is a Frequency Division Duplexing (FDD) system, it is assumed that the UE receives the DCI or the retransmission indication at the subframe n, and the UE implements the corresponding physical uplink shared channel at the subframe n+4 (Physical). Uplink Shared Channel, PUSCH) transmission;
  • FDD Frequency Division Duplexing
  • the eNB When the eNB is a TDD system and the uplink and downlink subframe matching mode is not 0, or the TDD uplink and downlink subframe matching mode is exactly equal to 0, but the UL resource scheduling information is carried in the DCI format 4, only one DL subframe is scheduled.
  • the UL resource and assuming that the UE receives the DCI or the retransmission indication at the subframe n, the UE performs the corresponding PUSCH transmission at the subframe n+k, where the value of k is related to the uplink and downlink subframe ratio mode of the TDD. For the specific value of k, see Table 1 below.
  • the eNB When the eNB is a TDD system and the uplink and downlink subframe matching mode is exactly equal to 0, and when the UL resource scheduling information is carried in the DCI Format 0, one DL subframe is allowed to schedule at most two ULs. Subframe. Which subframes are specifically scheduled is determined by the field UL index in DCI Format 0.
  • MSB Most Significant Bit
  • LSB Least Significant Bit
  • the UE transmits the PUSCH in the subframe n+7; when the MSB and the LSB of the UL index are both 1, the designated UE simultaneously transmits the PUSCH on the subframe n+k and the subframe n+7;
  • the eNB centrally allocates UL resources to all served UEs, and the eNB notifies the related UEs by using the PDCCH, and the allocated UL resources are allocated by the eNB.
  • the frequency domain location information is explicitly carried in the DCI format, and the time domain subframe position of the UL resource is determined by an implicit rule, and the time domain subframe position (n+k) and DCI of the allocated UL resource are located.
  • the embodiment of the present disclosure improves the uplink scheduling scheme.
  • the base station sends UL resource scheduling information to the UE in the first subframe to instruct the UE to start competing channel access opportunities from the second subframe, and uses the UL resource scheduling information when successfully competing for the channel access opportunity. Determining, by the second subframe, whether the UE uses the UL resource for uplink transmission, or determining whether the UL resource scheduling information is invalid, and determining that the UE uses the UL resource for uplink transmission, or determining the foregoing When the UL resource scheduling information fails, the UL resource indicated by the UL resource scheduling information is released.
  • the base station reserves the UL resource indicated by the UL resource scheduling information for the UE from the second subframe until the UE uses the UL resource for uplink transmission or the UL resource scheduling information fails, so that the base station can save a large number of scheduling signals.
  • the overhead is not lost in scheduling signaling.
  • the uplink scheduling method, the device, the device, and the system provided by the embodiments of the present disclosure may be applied to an application scenario of an unlicensed frequency band as a typical application scenario, or may be applied to an application scenario of a licensed frequency band, that is, The uplink scheduling method proposed by the embodiment of the present disclosure,
  • the application scenarios of devices, devices, and systems are not limited by the application scenarios of unlicensed bands.
  • the embodiment of the present disclosure provides an uplink scheduling method, as shown in FIG. 1 , which is an implementation flowchart of the method, and specifically includes the following steps:
  • Step 11 The base station sends UL resource scheduling information to the UE in the first subframe to instruct the UE to start competing channel access opportunities from the second subframe, and uses the UL resource scheduling information when successfully competing for the channel access opportunity.
  • the indicated UL resource wherein there is a first time delay between the first subframe and the second subframe.
  • the first delay existing between the first subframe and the second subframe may be, but not limited to, a subframe, or may be orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbol is a unit.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the base station When the first time delay is in a subframe, for example, the base station sends the UL resource scheduling information to the UE in the subframe n, the UE starts to contend for the channel access opportunity from the subframe n+k, and successfully competes for the channel connection.
  • the UL resource indicated by the UL resource scheduling information is used when entering the opportunity, where k is the first delay.
  • the time domain subframe position of the UL resource indicated by the UL resource scheduling information is no longer determined by an implicit rule set in advance, that is, The time domain subframe position of the UL resource indicated by the UL resource scheduling information does not have an explicit time interval relationship with the subframe where the base station transmits the UL resource scheduling information, but the base station reserves the UE for the UE from the second subframe.
  • UL resource indicated by the UL resource scheduling information when the base station sends the UL resource scheduling information to the UE, the time domain subframe position of the UL resource indicated by the UL resource scheduling information is no longer determined by an implicit rule set in advance, that is, The time domain subframe position of the UL resource indicated by the UL resource scheduling information does not have an explicit time interval relationship with the subframe where the base station transmits the UL resource scheduling information, but the base station reserves the UE for the UE from the second subframe. UL resource indicated by the UL resource scheduling information.
  • the above-mentioned “reservation” does not mean that the base station can no longer schedule other UEs on the reserved UL resources, but that the UE starts to compete for channel access from the second subframe. Opportunity, the base station can guarantee that the UE obtains the service on the reserved UL resources.
  • the base station can reserve the same UL resource for multiple different UEs through scheduling technology.
  • the bearer manner of the UL resource scheduling information sent by the base station to the UE in the frequency domain may be, but is not limited to, any one of the following manners:
  • the bearer is carried over other unlicensed frequency bands of different frequency bands than the UL resources indicated by the UL resource scheduling information, that is, cross-carrier scheduling.
  • Step 12 From the second subframe, when it is determined that the UE uses the UL resource indicated by the UL resource scheduling information to perform uplink transmission, or determines that the UL resource scheduling information fails, the UL resource indicated by the UL resource scheduling information is released.
  • the base station reserves the UL resource indicated by the UL resource scheduling information for the UE from the second subframe, it cannot be reserved without limitation, because if the UE fails to successfully compete for the channel access opportunity, it is pre- The retained UL resources will remain idle, resulting in a waste of UL resources.
  • the base station determines, from the second subframe, whether the UE performs uplink transmission by using the UL resource indicated by the UL resource scheduling information, or determines whether the UL resource scheduling information is invalid, and determines that the UE uses the UL resource scheduling information to indicate When the UL resource performs uplink transmission, or determines that the UL resource scheduling information fails, the UL resource indicated by the UL resource scheduling information is released.
  • the UL resource indicated by the UL resource scheduling information is released when the UL resource scheduling information is determined to be invalid from the second subframe, and may be, but is not limited to, determined as follows:
  • the preset time period is a second subframe to a third subframe, and a second delay exists between the second subframe and the third subframe.
  • the second delay existing between the second subframe and the third subframe may be, but not limited to, in units of subframes, and may also be in units of OFDM symbols.
  • the second delay is in units of subframes, for example, the second subframe is a subframe n+k, and the third subframe is n+k+1, and the second subframe and the third subframe are between
  • the second delay is l, l may be preset, which may be a fixed value, such as 4 or 10. It may also be explicitly indicated to the UE by adding a field in the DCI.
  • the base station When it is determined that the base station sends the resource failure information to the UE, it is determined that the UL resource scheduling information is invalid, and the UL resource indicated by the UL resource scheduling information is released.
  • the eNB may notify the UE that the UL resource allocated by the UE is invalidated by some dedicated signaling.
  • a new DCI may be designed to carry the resource failure information; or a new field (such as a UL resource failure flag) may be added to the DCI in the related art to carry the resource failure information; or the resource failure information. It can also be sent to the UE along with the Hybrid Automatic Repeat reQuest (HARQ) feedback information.
  • HARQ Hybrid Automatic Repeat reQuest
  • the base station When it is determined that the base station sends new UL resource scheduling information to the UE, it is determined that the UL resource scheduling information is invalid, and the UL resource indicated by the UL resource scheduling information is released.
  • the time domain subframe position of the UL resource indicated by the UL resource scheduling information does not have a clear time with the subframe where the base station transmits the UL resource scheduling information.
  • the interval relationship is such that the base station only needs to demodulate the uplink data of the UE in the determined time domain subframe position.
  • the time domain subframe position of the UL resource indicated by the UL resource scheduling information does not have a clear time interval relationship with the subframe where the base station transmits the UL resource scheduling information, so the base station needs to be always
  • the UL resource reserved by the UE monitors when the UE obtains the channel access opportunity, that is, the base station needs to determine whether the UE uses the UL resource for uplink transmission from the second subframe.
  • the UL resource indicated by the UL resource scheduling information is released, which may be, but is not limited to, implemented in the following manners:
  • DM RS De Modulation Reference Signal
  • the UE When it is detected that the demodulation reference signal exists, it is determined that the UE performs uplink transmission by using the UL resource, and releases the UL resource indicated by the UL resource scheduling information.
  • the modem signal is in the transmission data of the UE, and the base station can determine that the UE has successfully contend for the channel access opportunity by detecting the presence of the DM RS in the UL resource reserved for the UE.
  • the DM RS symbol may start on the second or third OFDM symbol, so this method has hysteresis.
  • the eNB In order to avoid missed detection, for each possible UL subframe, the eNB needs to buffer at least the first few OFDM symbols until the existence decision of the DM RS is completed.
  • the DM RS is cell-specific and is easy for the eNB to perform signal detection. The reason is that, considering the scenario in which multiple UEs share UL frequency domain resources by frequency division multiplexing, the eNB does not need to configure different matching sequences for each UE, and only needs to configure one same cell specified sequence to be able to be in all frequency bands. The presence detection of the DM RS is completed.
  • the eNB detects the DM RS on the UL resource reserved for a certain UE, determines that the UE successfully contends for the channel access opportunity, and uses the UL resource for uplink transmission; otherwise, determines that the UE does not successfully compete for the channel. Access opportunities.
  • the UE When it is detected that the transmission data exists, it is determined that the UE performs uplink transmission by using the UL resource, and releases the UL resource indicated by the UL resource scheduling information.
  • the eNB attempts to resolve the scheduled UL resources at each possible UL subframe. If the correct demodulation is possible, it is determined that the UE successfully contends for the channel access opportunity; otherwise, it is determined that the UE does not successfully compete for the channel access opportunity.
  • the transmission data of the UE is scrambled by the UE-specific sequence, the blind detection complexity is higher than that of the first method.
  • the UE When it is detected that there is a preamble partial subframe, it is determined that the UE performs uplink transmission by using the UL resource, and releases the UL resource indicated by the UL resource scheduling information.
  • the UE successfully contends for the channel access opportunity, the UE first sends the preamble portion to occupy the channel, and after the boundary of the next subframe of the L-band is reached, the uplink data is actually sent.
  • the partial information (such as a partial OFDM symbol) of the preamble partial subframe transmitted by the UE is UE specified. Therefore, the eNB can determine whether the UE successfully contends for the channel access opportunity by detecting the preamble partial subframe sent by the UE.
  • the base station sends UL resource scheduling information to the UE in the first subframe to instruct the UE to start competing channel access opportunities from the second subframe, and uses the UL resource when successfully competing for the channel access opportunity. Scheduling the UL resource indicated by the information, and determining, from the second subframe, whether the UE uses the UL resource for uplink transmission, or determining whether the UL resource scheduling information is invalid, and determining whether the UE uses the UL resource for uplink transmission, or determining When the foregoing UL resource scheduling information fails, the UL resource indicated by the UL resource scheduling information is released.
  • the base station reserves the UL resource indicated by the UL resource scheduling information for the UE from the second subframe until the UE uses the UL resource for uplink transmission or the UL resource scheduling information fails, so that the base station can save a large number of scheduling signals.
  • the overhead is not lost in scheduling signaling.
  • the embodiment of the present disclosure further provides an uplink scheduling method implemented by the terminal side. As shown in FIG. 2, the method includes the following steps:
  • Step 21 The UE receives uplink UL resource scheduling information sent by the base station in the first subframe.
  • Step 22 contend for the channel access opportunity from the second subframe until the channel access opportunity is successfully contending, or the UL resource indicated by the UL resource scheduling information is invalid; wherein, the first subframe and the second subframe There is a first delay between.
  • starting the contention channel access opportunity from the second subframe until the UL resource failure indicated by the UL resource scheduling information may be, but is not limited to, implemented as follows:
  • the UE When the UE contends for the channel access opportunity from the second subframe, if the UE does not successfully compete for the channel access opportunity within the preset time period, it determines that the UL resource scheduling information is invalid, and stops the contention channel access opportunity; , the preset time period is the second subframe to the third subframe, and the second There is a second delay between the subframe and the third subframe;
  • the UE When the UE starts to contend for the channel access opportunity from the second subframe, if the UE receives the resource failure information sent by the base station, it determines that the UL resource scheduling information is invalid, and stops the contention channel access opportunity;
  • the UE When the UE starts to contend for the channel access opportunity from the second subframe, if the UE receives the new UL resource scheduling information sent by the base station, determines that the UL resource scheduling information is invalid, and stops the contention channel access opportunity; wherein, the new UL The UL resource indicated by the resource scheduling information is that the base station re-allocates for the UE.
  • the UE performs the LBT mechanism to contend for the channel access opportunity. After the UE successfully contends for the channel access opportunity, the UE performs uplink on the UL resource (mainly referred to as the frequency domain resource) indicated by the UL resource scheduling information. transmission.
  • the UL resource mainly referred to as the frequency domain resource
  • the uplink resource is generally implemented on the UL resource (mainly referred to as the frequency domain resource) indicated by the UL resource scheduling information.
  • a DL subframe can only schedule one UL subframe, which means that after the UE completes uplink transmission of one subframe, the frequency domain resource is released and re-allocated by the base station to the next UE for use. Then, when a UE has multiple UL subframes to transmit at the same time, the uplink scheduling process described above causes a large time domain interval between adjacent two schedulings, resulting in low transmission efficiency.
  • FIG. 3 it is a schematic diagram of single subframe scheduling.
  • UE1 was successful channel access opportunities to compete at the time m 1.
  • eNB Since there are a large UE1 UL data to be transmitted, eNB at n 2 second time allocated UL resources for UE1. Obviously, n 2 >m 1 . M 2 at the time UE1 successfully compete for the channel access opportunities. Since UL signaling requires at least k subframes from issue to entry, m 2 -n 2 ⁇ k. Therefore, the UE needs to wait at least between the last transmission opportunities: m 2 -m 1 ⁇ k+n 2 -m 1 >k+1. That is, each time the UE transmits one UL subframe, at least k+1 subframes need to be waited in the middle, so the maximum transmission efficiency of the UE is ⁇ 1/(k+1).
  • the UE does not necessarily compete for channel access opportunities every time, so there will be a longer waiting time between the two UL transmissions. That is, the actual UE transmission efficiency will be much lower than 1/(k+1).
  • the uplink scheduling procedure in the related art will result in lower UE UL transmission efficiency.
  • the embodiment of the present disclosure improves the foregoing uplink scheduling procedure, so that when the UE successfully competes for a channel access opportunity, multiple UL subframes can be simultaneously transmitted.
  • FIG. 4 is a flowchart of an implementation of an uplink scheduling method implemented by a network side according to an embodiment of the present disclosure, which specifically includes the following steps:
  • Step 41 The base station sends UL resource scheduling information to the UE in the first subframe to instruct the UE to start competing channel access opportunities from the second subframe, and uses the UL resource scheduling information to indicate when successfully competing for the channel access opportunity.
  • the UL resource scheduling information includes: a total number of schedulable subframes N and a first UL resource scheduling parameter, where the N characterizes that the UE can simultaneously schedule N UL subframes when performing uplink transmission by using the UL resource.
  • N is an integer greater than or equal to 1
  • the first UL resource scheduling parameter is a configuration parameter of each UL subframe used when the UE performs uplink transmission by using the UL resource.
  • the base station configures the same scheduling parameter for each UL subframe used by the UE to perform uplink transmission by using the UL resource.
  • TXOP transmission opportunity
  • Step 42 From the second subframe, when it is determined that the UE uses the UL resource for uplink transmission, or determines that the UL resource scheduling information fails, the UL resource indicated by the UL resource scheduling information is released.
  • FIG. 5 it is a schematic diagram of multi-subframe scheduling implemented according to the foregoing embodiment.
  • the eNB successfully compete for the UE to confirm the channel access opportunity time m 1, thus releasing the corresponding UL resource m 1 time.
  • the eNB may start to allocate the UE at the second subframe (m 1 +1, ie, n 2 ) after confirming the channel access opportunity that the UE successfully contends last time.
  • One UL resource Ideally, the UE re-competes to the channel access opportunity at time m 2 after the last UL transmission ends, and then starts a new UL transmission immediately. That is, in the UL multi-subframe transmission mode, UL scheduling does not become a bottleneck limiting UL transmission efficiency.
  • FIG. 6 is a flowchart of an implementation of an uplink scheduling method implemented by a network side according to an embodiment of the present disclosure, which specifically includes the following steps:
  • Step 61 The base station sends at least one piece of UL resource scheduling information to the UE, and the last piece of UL resource scheduling information in the at least one piece of UL resource scheduling information is sent in the first subframe to indicate that the UE starts to contend for the channel from the second subframe.
  • each UL resource scheduling information includes: a schedulable subframe sequence number n, and a second UL resource scheduling parameter And a total number N of schedulable subframes, where N indicates that the UE can simultaneously schedule N UL subframes when the uplink resource is transmitted by using the UL resource, where N is an integer greater than or equal to 1; n indicates that the UE is uplinking by using the UL resource.
  • n ranges from 0 to N-1, and the value of n is sent according to the UL resource scheduling information.
  • the sequence is sequentially incremented; the second UL resource scheduling parameter is a configuration parameter of the UL subframe corresponding to n in the N UL subframes that the UE can simultaneously schedule.
  • the base station configures different scheduling parameters for each UL subframe used by the UE to perform uplink transmission by using the UL resource.
  • Step 62 From the second subframe, when it is determined that the UE performs uplink transmission by using the UL resource, or determines that the UL resource scheduling information is invalid, the UL resource indicated by the UL resource scheduling information is released.
  • the function of the UL index field in the DCI format 0 of the related art overlaps with the function of the embodiment of the present disclosure.
  • the field UL index is not needed, so the UL index field in DCI format 0 can be canceled, and the saved number of bits can be used for other purposes.
  • the UL index field in the related art may be multiplexed to indicate multi-subframe scheduling information to reduce DCI overhead caused by the multi-subframe scheduling mode.
  • the embodiment of the present disclosure further provides another uplink scheduling method implemented by the terminal side. As shown in FIG. 7, the method includes the following steps:
  • Step 71 The UE receives the UL resource scheduling information sent by the base station in the first subframe, where the UL resource scheduling information includes: a total number N of schedulable subframes and a first UL resource scheduling parameter; and N indicates that the UE is using the UL resource.
  • the UL resource scheduling information includes: a total number N of schedulable subframes and a first UL resource scheduling parameter; and N indicates that the UE is using the UL resource.
  • N UL subframes may be scheduled at the same time, and N is an integer greater than or equal to 1
  • the first UL resource scheduling parameter is a configuration parameter of each UL subframe used by the UE to perform uplink transmission by using the UL resource.
  • Step 72 Start a contention channel access opportunity from the second subframe until the channel access opportunity is successfully contending, or the UL resource indicated by the UL resource scheduling information is invalid.
  • Step 73 When the UE successfully contends for the channel access opportunity, perform uplink transmission on the N UL subframes from the time of successful competition to the channel access opportunity according to the first UL resource scheduling parameter.
  • the embodiment of the present disclosure further provides another uplink scheduling method implemented by the terminal side, as shown in FIG. 8 , including the following steps:
  • Step 81 Receive at least one piece of UL resource scheduling information sent by the base station, and the last piece of the UL resource scheduling information in the at least one piece of the UL resource scheduling information is received in the first subframe, where each UL resource scheduling information includes: The scheduling subframe sequence number n, the second UL resource scheduling parameter, and the total number of schedulable subframes N; wherein, the N characterizes that the UE can simultaneously schedule N UL subframes when the uplink resource is transmitted by using the UL resource, where N is greater than or equal to An integer of 1; n characterizes the sequence number of the currently scheduled UL subframe in the N UL subframes that can be simultaneously scheduled when the UE performs uplink transmission by using the UL resource, where n ranges from 0 to N-1, and The value of n is sequentially incremented according to the order in which the UL resource scheduling information is sent.
  • the second UL resource scheduling parameter is a configuration parameter of the UL subframe corresponding to n in the N
  • Step 82 Start a contention channel access opportunity from the second subframe until the channel access opportunity is successfully contending, or the UL resource indicated by the UL resource scheduling information is invalid.
  • Step 83 When the UE successfully contends to the channel access opportunity, according to each UL resource received In the order of n from small to large in the source scheduling information, the second UL resource scheduling parameter corresponding to n is sequentially used, and the uplink transmission is performed on N UL subframes from the successful contention to the channel access opportunity.
  • an embodiment of the present disclosure further provides an uplink scheduling apparatus, a device, and an uplink scheduling apparatus, an apparatus, and an uplink scheduling system implemented by a terminal side, where the foregoing apparatus, device, and system solve the problem.
  • the principle is similar to the uplink scheduling method implemented on the network side and the uplink scheduling method implemented on the terminal side. Therefore, the implementation of the foregoing devices, devices, and systems can be referred to the implementation of the method, and the repeated description is not repeated.
  • FIG. 9 is a schematic structural diagram of a first uplink scheduling apparatus according to an embodiment of the present disclosure, including:
  • the UL resource scheduling information sending unit 91 is configured to send uplink UL resource scheduling information to the user equipment UE in the first subframe to instruct the UE to start competing channel access opportunities from the second subframe, and compete successfully.
  • the UL resource indicated by the UL resource scheduling information is used when the channel access opportunity is used; wherein a first time delay exists between the first subframe and the second subframe;
  • the UL resource scheduling information releasing unit 92 is configured to release the UL when determining, by the second subframe, that the UE uses the UL resource to perform uplink transmission, or determines that the UL resource scheduling information is invalid.
  • the UL resource scheduling information release unit 92 is specifically configured to:
  • the UL resource scheduling information release unit 92 is specifically configured to:
  • the bearer mode of the UL resource scheduling information in the frequency domain is any one of the following manners:
  • the bearer is carried on other unlicensed frequency bands that are different from the UL resource indicated by the UL resource scheduling information.
  • the UL resource scheduling information sending unit 91 is specifically configured to:
  • the UL resource scheduling information includes: a total number N of schedulable subframes and a first UL resource scheduling parameter;
  • the N UL subframes may be scheduled at the same time, where the N is an integer greater than or equal to 1;
  • the first UL resource scheduling parameter is used by the UE to perform uplink transmission by using the UL resource. Configuration parameters for each UL subframe.
  • the UL resource scheduling information sending unit 91 is specifically configured to:
  • each UL resource scheduling information includes: a schedulable sub Frame arrangement number n, second UL resource scheduling parameters, and schedulable sub- a total number of frames N; wherein the N characterizes that the UE may simultaneously schedule N UL subframes when the uplink resource is transmitted by using the UL resource, where N is an integer greater than or equal to 1;
  • the sequence number of the currently scheduled UL subframe in the N UL subframes that can be simultaneously scheduled the range of n ranges from 0 to N-1, and The value of n is sequentially incremented according to the sending order of the UL resource scheduling information;
  • the second UL resource scheduling parameter is the UL subframe corresponding to the n in the N UL subframes that the UE can simultaneously schedule.
  • Configuration parameters are: a schedulable sub Frame arrangement number n, second UL resource scheduling parameters, and schedulable sub- a total number of frames N;
  • modules or units
  • functions of the various modules may be implemented in one or more software or hardware when implementing the present disclosure.
  • the foregoing first uplink scheduling apparatus may be disposed in a base station.
  • FIG. 10 is a schematic structural diagram of a second uplink scheduling apparatus according to an embodiment of the present disclosure, including:
  • the UL resource scheduling information receiving unit 101 is configured to receive uplink UL resource scheduling information sent by the base station in the first subframe.
  • a competing unit 102 configured to start to contend for a channel access opportunity from the second subframe until the channel access opportunity is successfully contending or the UL resource indicated by the UL resource scheduling information fails; wherein the first subframe and There is a first time delay between the second subframes.
  • the contention unit 102 is specifically configured to:
  • the channel access opportunity When the channel access opportunity is contending from the second subframe, if the channel access opportunity is not successfully contending in the preset time period, it is determined that the UL resource scheduling information is invalid, and the contention channel access opportunity is stopped;
  • the time period is the second subframe to the third subframe, and the second subframe has a second delay between the second subframe and the third subframe; or
  • the contention channel access opportunity is started from the second subframe, if the resource failure information sent by the base station is received, it is determined that the UL resource scheduling information is invalid, and the contention channel access opportunity is stopped; or
  • the new UL resource scheduling information sent by the base station is received, it is determined that the UL resource scheduling information is invalid, and the contention channel access opportunity is stopped;
  • the UL resource indicated by the new UL resource scheduling information is the base station re Assigned to it.
  • the device further comprises:
  • the transmitting unit 103 is configured to perform uplink transmission by using the UL resource indicated by the UL resource scheduling information when successfully competing for a channel access opportunity.
  • the UL resource scheduling information receiving unit 101 is specifically configured to:
  • the UL resource scheduling information includes: a total number N of schedulable subframes and a first UL resource scheduling parameter; the total number of the schedulable subframes
  • the N-characterized UE may simultaneously schedule N UL subframes when the uplink resource is transmitted by using the UL resource, where the N is an integer greater than or equal to 1; the first UL resource scheduling parameter is used by the UE by the UE Configuration parameters of each UL subframe used by the UL resource for uplink transmission;
  • the transmission unit 103 is specifically configured to:
  • the uplink transmission is performed on the N UL subframes from the time of successful competition to the channel access opportunity according to the first UL resource scheduling parameter.
  • the UL resource scheduling information receiving unit 101 is specifically configured to:
  • each of the UL resource scheduling information includes: The N-arrangement sequence number n, the second UL resource scheduling parameter, and the total number of schedulable subframes N; wherein the N characterizes that the UE can simultaneously schedule N ULs when performing uplink transmission by using the UL resource In the subframe, the N is an integer greater than or equal to 1; the n characterizes the arrangement of the currently scheduled UL subframe in the N UL subframes that can be simultaneously scheduled when the UE performs uplink transmission by using the UL resource.
  • the value of the n is in the range of 0 to N-1, and the value of the n is sequentially incremented according to the sending order of the UL resource scheduling information;
  • the second UL resource scheduling parameter is The configuration parameters of the UL subframe corresponding to the n in the N UL subframes that are simultaneously scheduled;
  • the transmission unit is specifically configured to:
  • the second UL resource scheduling parameter corresponding to the n is sequentially used according to the sequence of n from small to large in each received UL resource scheduling information, from successful competition to Uplink transmission is performed on N UL subframes from the channel access opportunity.
  • modules or units
  • the functions of the various modules (or units) may be implemented in one or more software or hardware in the implementation of the present disclosure.
  • the foregoing second uplink scheduling apparatus may be configured in a user equipment.
  • FIG. 11 is a schematic structural diagram of an uplink scheduling system according to an embodiment of the present disclosure, including: a base station 111 and a user equipment 112, where:
  • the base station 111 is configured to send uplink UL resource scheduling information to the user equipment UE 112 in the first subframe to instruct the UE 112 to start competing channel access opportunities from the second subframe, and successfully compete for channel access.
  • the UL resource indicated by the UL resource scheduling information is used when entering the opportunity; wherein, the first time delay exists between the first subframe and the second subframe; and from the second subframe, when Determining, when the UE 112 performs uplink transmission by using the UL resource, or determining that the UL resource scheduling information is invalid, releasing the UL resource indicated by the UL resource scheduling information;
  • the user equipment UE 112 receives the uplink UL resource scheduling information sent by the base station 111 in the first subframe; and starts to contend for the channel access opportunity from the second subframe until the channel access opportunity or the UL resource is successfully contending
  • the UL resource indicated by the scheduling information is invalid.
  • LTE system is taken as an example in the foregoing embodiments, those skilled in the art can apply the foregoing embodiments to other various communication systems after reading the disclosure. For example, it is applied to a flexible frame structure application scenario of a 5G mobile communication system.
  • embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

L'invention concerne un procédé un appareil, un dispositif et un système de programmation de liaison montante. Le procédé comprend les étapes suivantes : une station de base transmet des informations de programmation de ressources de liaison montante (UL) à un équipement utilisateur (UE) dans une première sous-trame pour indiquer à l'UE d'entrer en compétition pour une opportunité d'accès de canal à partir d'une seconde sous-trame, et pour utiliser les ressources UL indiquées par les informations de programmation de ressources UL lorsque la compétition pour l'opportunité d'accès de canal est remportée ; il y a un premier retard de temps entre la première sous-trame et la seconde sous-trame ; à partir de la seconde sous-trame, les ressources UL indiquées par les informations de programmation de ressources UL sont libérées lorsqu'il est déterminé que l'UE effectue une transmission en liaison montante à l'aide des ressources UL ou que les informations de programmation de ressources UL sont invalides.
PCT/CN2016/082034 2015-05-15 2016-05-13 Procédé, appareil, dispositif et système de programmation de liaison montante WO2016184365A1 (fr)

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