WO2017050087A1 - 一种上行传输资源调度及上行传输方法、装置 - Google Patents

一种上行传输资源调度及上行传输方法、装置 Download PDF

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Publication number
WO2017050087A1
WO2017050087A1 PCT/CN2016/096734 CN2016096734W WO2017050087A1 WO 2017050087 A1 WO2017050087 A1 WO 2017050087A1 CN 2016096734 W CN2016096734 W CN 2016096734W WO 2017050087 A1 WO2017050087 A1 WO 2017050087A1
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Prior art keywords
resource
reserved resource
uplink subframe
user equipment
uplink
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PCT/CN2016/096734
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English (en)
French (fr)
Inventor
王加庆
潘学明
徐伟杰
司倩倩
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电信科学技术研究院
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Application filed by 电信科学技术研究院 filed Critical 电信科学技术研究院
Priority to KR1020187011759A priority Critical patent/KR20180058805A/ko
Priority to US15/763,091 priority patent/US11197320B2/en
Priority to JP2018515818A priority patent/JP2018528721A/ja
Priority to EP16847969.9A priority patent/EP3355614A4/en
Publication of WO2017050087A1 publication Critical patent/WO2017050087A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26—Resource reservation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • 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
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal

Definitions

  • the present application relates to the field of communications technologies, and in particular, to an uplink transmission resource scheduling and uplink transmission method and apparatus.
  • the LTE system is a U-LTE or LTE-U (Unlicensed LTE) system to improve the UE experience and extended coverage.
  • LTE-U Unlicensed LTE
  • the unlicensed spectrum is not planned for a specific application system, and can be shared by various wireless communication systems such as Bluetooth, WIFI (Wireless Local Area Network), etc., and the shared unlicensed spectrum resources are used by multiple systems by preempting resources. Therefore, the coexistence of LTE-U deployed by different operators and wireless communication systems such as LTE-U and WIFI is a key point and difficulty in research.
  • the 3GPP requires guaranteeing the fair coexistence of wireless communication systems such as LTE-U and WIFI, and the unlicensed frequency band is used as a secondary carrier to be assisted by the primary carrier of the licensed frequency band.
  • the UE of the unlicensed band LTE-U needs to perform the LBT (Listen Before Talk) operation before transmitting the data.
  • the unlicensed band performs time division multiplexing, the UE that is transmitting the signal (User Equipment, user equipment) must block the scheduled UE access channel.
  • the prior art does not provide a scheduling and usage scheme for unlicensed spectrum resources.
  • the embodiment of the present application provides an uplink transmission resource scheduling and uplink transmission method and apparatus, which are used to implement reservation of an uplink transmission resource on an unlicensed carrier, so that the UE does not perform uplink signal transmission in the reserved resource, and avoids being scheduled.
  • the UE cannot access the channel, and can implement time division multiplexing of uplink transmission resources on the unlicensed carrier.
  • the base station sends a notification of the reserved resource in the uplink subframe to the user equipment.
  • the base station determines a reserved resource in an uplink subframe, and the reserved resource is a transmission on an unlicensed carrier. a resource, the base station sends a notification of the reserved resource in the uplink subframe to the user equipment, so that the reservation of the uplink transmission resource on the unlicensed carrier is implemented, so that the UE does not perform uplink signal transmission on the reserved resource.
  • the scheduled UE is prevented from accessing the channel, and time division multiplexing of the uplink transmission resources on the unlicensed carrier can be implemented.
  • the base station sends a notification of the reserved resource in the uplink subframe to the user equipment in a semi-static or dynamic manner.
  • the base station when the base station sends the notification of the reserved resource in the uplink subframe to the user equipment in a semi-static manner, the base station sends the user equipment in the uplink subframe by using non-physical layer signaling. Notification of reserved resources;
  • the base station When the base station sends the notification of the reserved resource in the uplink subframe to the user equipment in a dynamic manner, the base station sends a notification of the reserved resource in the uplink subframe to the user equipment by using physical layer signaling.
  • the reserved resource is used by the user equipment to perform an LBT operation after listening first.
  • the notification carries one or a combination of the following information:
  • the user equipment needs to reserve the indication information of the resource in the uplink subframe.
  • the size of the reserved resource in the uplink subframe containing the reserved resource is the size of the reserved resource in the uplink subframe containing the reserved resource.
  • the reserved resource is located at a head or a tail of at least one uplink subframe.
  • the user equipment determines a reserved resource in the uplink subframe, where the reserved resource is a transmission resource on the unlicensed carrier;
  • the user equipment determines that uplink signal transmission is not performed in the reserved resource.
  • the method further includes:
  • the LBT operation is performed after the reserved resource is first listened to;
  • the user equipment when the user equipment accesses the channel, the user equipment performs uplink signal transmission on the uplink resource scheduled by the base station.
  • the reserved resources in the uplink subframe are pre-configured
  • the user equipment receives the notification of the reserved resource in the uplink subframe sent by the base station in a semi-static or dynamic manner, and determines the reserved resource in the uplink subframe by using the notification.
  • a reservation unit configured to determine a reserved resource in an uplink subframe, where the reserved resource is a transmission resource on an unlicensed carrier
  • a notification unit configured to send, to the user equipment, a notification of the reserved resource in the uplink subframe.
  • the notification unit sends a notification of the reserved resource in the uplink subframe to the user equipment in a semi-static or dynamic manner.
  • the notification unit sends the reserved resource in the uplink subframe to the user equipment in a semi-static manner.
  • the notification unit sends a notification of the reserved resource in the uplink subframe to the user equipment by using the non-physical layer signaling;
  • the notification unit sends the notification of the reserved resource in the uplink subframe to the user equipment in a dynamic manner
  • the notification unit sends the reserved resource in the uplink subframe to the user equipment by using physical layer signaling. Notice.
  • the reserved resource is used by the user equipment to perform an LBT operation after listening first.
  • the notification carries one or a combination of the following information:
  • the user equipment needs to reserve the indication information of the resource in the uplink subframe.
  • the size of the reserved resource in the uplink subframe containing the reserved resource is the size of the reserved resource in the uplink subframe containing the reserved resource.
  • the reserved resource is located at a head or a tail of at least one uplink subframe.
  • a first unit configured to determine a reserved resource in an uplink subframe, where the reserved resource is a transmission resource on an unlicensed carrier
  • a second unit configured to determine, in the reserved resource, that no uplink signal transmission is performed.
  • the second unit is further configured to:
  • the LBT operation is performed after the reserved resource is first listened to;
  • uplink signal transmission is performed on the uplink resource scheduled by the base station.
  • the reserved resources in the uplink subframe determined by the first unit are pre-configured
  • the first unit receives a notification of the reserved resource in the uplink subframe sent by the base station in a semi-static or dynamic manner, and determines the reserved resource in the uplink subframe by using the notification.
  • FIG. 1 is a schematic diagram of a method for preempting resources of a WIFI system on an unlicensed spectrum according to an embodiment of the present application
  • FIG. 2 is a schematic diagram of a channel access mechanism according to an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram of another channel access mechanism according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of a first type of frame provided by an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a second type of frame according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic flowchart of an uplink transmission resource scheduling method according to an embodiment of the present disclosure
  • FIG. 7 is a schematic flowchart of an uplink transmission method according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of reserved resources determined by a static configuration manner according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic diagram of reserved resources determined by a semi-static configuration manner according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram of reserved resources determined by a dynamic configuration manner according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of an apparatus for scheduling an uplink transmission resource according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of an uplink transmission apparatus according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of another uplink transmission resource scheduling apparatus according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of another uplink transmission apparatus according to an embodiment of the present application.
  • the embodiment of the present application provides an uplink transmission resource scheduling and uplink transmission method and apparatus, which are used to implement reservation of an uplink transmission resource on an unlicensed carrier, so that the UE does not perform uplink signal transmission in the reserved resource, and avoids being scheduled.
  • the UE cannot access the channel, and can implement time division multiplexing of uplink transmission resources on the unlicensed carrier.
  • the LBT in the embodiment of the present application serves as a basic means for LTE-U to compete for access.
  • the essence of LBT technology is still that the 802.11 system adopts the carrier sense/collision avoidance (CSMA/CA) mechanism.
  • the WIFI system preempts resources on the unlicensed spectrum, as shown in Figure 1, including: First, the channel is monitored, when the channel When the idle time reaches the DISFS (Distributed Inter-Frame Space), the current channel is determined to be an idle channel, and then the stations waiting for access to the channel enter a random fallback phase to avoid multiple sites. The same resources collide. In addition, in order to ensure fairness, it is also stipulated that each site cannot occupy spectrum resources for a long time. When a certain time or data transmission limit is reached, resources need to be released for other WIFI or LTE systems to seize resources.
  • DISFS Distributed Inter-Frame Space
  • CCA Cross Channel Assessment
  • the European ETSI standardizes the LBT of the 5 GHz unlicensed band, as shown in Figure 2 and Figure 3: Frame Based Equipment, and FBE (Load Based Equipment). the way.
  • the FBE access performs CCA detection at a fixed frame structure position.
  • the channel has a CCA period (not less than 20 us)
  • the channel is immediately accessed and the data transmission process is initiated, and the channel transmission time occupation time is relatively fixed.
  • the minimum 1ms, the maximum 10ms, the idle period should be at least 5% of the channel occupancy time, and the device performs a new CCA detection to access the channel again during the CCA time at the end of the idle period.
  • the channel occupation time plus the idle period is a fixed value called a frame period.
  • the LBE access mechanism is similar to the CSMA/CA mechanism of WIFI.
  • the time and starting point of the channel for each transmission are variable, and the extended CCA detection is performed before the channel is acquired, first according to CW (Contention).
  • the size q of the Window, the contention window generates a random factor N until the channel idle time reaches N times the CCA time, and the channel is idle, accessing the channel, and initiating the data transmission process, the maximum channel occupation time is 13 ms.
  • ETSI LBE is divided into options (option) A and option B.
  • the ETSI option B contention window is fixed and is the most basic LBE form.
  • the LTE system supports both FDD and TDD duplex modes, and the two duplex modes use different frame structures. Common to both frame structures is that each radio frame consists of 10 1 ms subframes.
  • the FDD system uses the first type of frame structure as shown in FIG. 4, and the TDD system uses the second type of frame structure, as shown in FIG.
  • 3GPP currently defines four categories for LBT:
  • LBT category 1 that is, LBT is not required
  • LBT category 2 which has a fixed backoff value, does not need to be randomly rolled back before transmitting a burst, and only performs a single CCA detection, ie access channel, FBE is a special case of LBT category 2;
  • LBT category 3 and LBT category 4 both use a random backoff value similar to CSMA/CA, LBT category 3 uses a fixed contention window, and ETSI LBE option B belongs to LBT category 3;
  • the LBT category 4 is based on the ETSI LBE option B fix, which uses a load-based LBT, and the contention window is exponentially increasing or semi-statically configured. Since WIFI adopts the CSMA/CA access mechanism, the competition window exponential expansion method is adopted. In order to achieve fair coexistence between LTE-U and WIFI, 3GPP requires that LBT category 4 should be adopted at least in the downlink transmission of LTE-U, and four categories of LTE-U uplink LBT scheme are possible, and no conclusion has been made yet.
  • the scheduled UE may need to perform time division multiplexing among multiple uplink transmission subframes, one case, such as uplink data transmission time of some UEs. Long, for example, multiple subframes, other UE data only requires a short transmission time, such as one subframe; in another case, certain regions or countries specify the maximum channel occupied time of the UE (Maximum channel occupied time) Below the configured number of uplink subframes, time division multiplexing of different UEs in the uplink subframe becomes a problem that must be solved.
  • time division multiplexing of different UEs in the uplink subframe becomes a problem that must be solved.
  • the UE of the unlicensed band LTE-U needs to perform the LBT operation before transmitting the data.
  • the transmitting UE will inevitably block the scheduled UE access channel. How to perform multi-UE time division multiplexing in LTE-U uplink transmission, and how to reserve resources for LBT for new access UEs during time division multiplexing has no solution at present.
  • the embodiment of the present application provides a method for configuring a UE to reserve resources for LBT or other operations in an unlicensed frequency band and UL multi-UE time division multiplexing.
  • the specific solution is as follows:
  • an uplink transmission resource scheduling method provided by an embodiment of the present application includes:
  • the base station determines a reserved resource in the uplink subframe, where the reserved resource is a transmission resource on the unlicensed carrier.
  • the base station sends a notification of the reserved resource in the uplink subframe to the user equipment.
  • the base station determines the reserved resource in the uplink subframe, and the reserved resource is the transmission resource on the unlicensed carrier, and the base station sends the notification of the reserved resource in the uplink subframe to the user equipment, thereby implementing the unlicensed carrier.
  • the reservation of the uplink transmission resource is such that the UE does not perform uplink signal transmission on the reserved resource, prevents the scheduled UE from accessing the channel, and can implement time division multiplexing of the uplink transmission resource on the unlicensed carrier.
  • the scheduled UE may be configured to reserve resources for operations such as LBT in the uplink subframe in a static, semi-static or dynamic manner.
  • the base station sends a notification of the reserved resource in the uplink subframe to the user equipment in a semi-static or dynamic manner.
  • the base station when the base station sends the notification of the reserved resource in the uplink subframe to the user equipment in a semi-static manner, the base station sends the notification of the reserved resource in the uplink subframe to the user equipment by using the non-physical layer signaling.
  • the base station When the base station sends a notification of the reserved resource in the uplink subframe to the user equipment in a dynamic manner, the base station sends a notification of the reserved resource in the uplink subframe to the user equipment by using physical layer signaling.
  • the reserved resource is used by the user equipment to perform the LBT operation after listening first.
  • the notification carries one or a combination of the following information:
  • the user equipment needs to reserve the indication information of the resource in the uplink subframe.
  • the size of the reserved resource in the uplink subframe containing the reserved resource is the size of the reserved resource in the uplink subframe containing the reserved resource.
  • the user equipment needs to reserve the resource information in the uplink subframe, for example, by adding 1 bit in the UL grant to inform the UE whether the PUSCH scheduled to be reserved by the UL grant needs to reserve resources (the specific reserved symbol resource is, for example, the last one. One or N symbols, or the previous one or N symbols, these changes apply).
  • the size of the reserved resource in the uplink subframe that includes the reserved resource may be pre-agreed or may be notified by signaling.
  • the reserved resource is located at the head or the tail of the at least one uplink subframe, and the reserved resource may be located in one uplink subframe, or may be located in multiple uplink subframes, and may be located at the head of the uplink subframe. Middle or tail.
  • the base station and the UE configure the LBT subframes and the resources for the LBT in the LBT subframes once every N subframes.
  • the LBT subframes may be configured at different intervals, and the number of LBT subframes is not necessarily one.
  • the UE does not send a signal on the corresponding reserved resource according to the configuration of the base station; all the scheduled UEs that correctly receive the UL grant (signal used in semi-persistent scheduling or dynamic scheduling) are configured for LBT in the base station.
  • the LBT operation is performed on the reserved resource; the UE accessing the channel performs uplink signal transmission on the mobilized uplink resource.
  • an uplink transmission method provided by an embodiment of the present application includes:
  • the user equipment determines a reserved resource in an uplink subframe, where the reserved resource is a transmission resource on the unlicensed carrier.
  • the user equipment determines that no uplink signal transmission is performed when the resource is reserved.
  • the method further includes:
  • the LBT operation is performed after the resource is reserved for listening first;
  • the user equipment when the user equipment accesses the channel, the user equipment performs uplink signal transmission on the uplink resource scheduled by the base station.
  • the reserved resources in the uplink subframe are pre-configured
  • the user equipment receives the notification of the reserved resource in the uplink subframe sent by the base station in a semi-static or dynamic manner, and determines the reserved resource in the uplink subframe by using the notification.
  • the base station and the UE agree (without signaling indication) on all uplink subframes or a certain subset of the uplink subframes (that is, in some uplink subframes), reserved for execution.
  • Resources for LBT operations A specific available method is an uplink subframe in which the resource for the LBT can be reserved, and the subframe is defined as an LBT subframe (this definition is applicable to all embodiments, and will not be described later), and these are agreed upon.
  • Resources for LBT operations including at least location and size) that need to be reserved on the configured LBT subframe. As shown in FIG.
  • the base station and the UE configure the resources for the LBT in the LBT subframe and the LBT subframe once every N subframes (of course, the LBT subframes may be configured at different intervals, and the number of LBT subframes may not necessarily be
  • the size of the TTI (Transmission Time Interval) used by each UE may be less than 1 or equal to 1, or greater than 1. This description is applicable to all embodiments, and will not be described later.
  • the mode is LBT category 2, that is, only one CCA detection is performed before the UL burst is sent (other access methods are not excluded, and the described method is also applicable to other access modes other than category 2), and the configured LBT resource size is better.
  • the configured LBT resource location may be located at the head of the configured LBT subframe or at the end of the LBT subframe.
  • the starting point of the UL signal transmission is located at the subframe boundary, it is preferably required at the end of the LBT subframe.
  • the new UE is configured to use the LBT resource.
  • the UE that is transmitting the signal on the LBT subframe needs to stop transmitting the signal in the LBT resource configured at the end of the subframe, and then all successfully receive the UL grant corresponding to the next subframe.
  • the UE performs LBT operation in the LBT resource of the corresponding LBT subframe, and the UE accessing the channel performs uplink transmission; when the starting point of the UL signal transmission is not located at the subframe boundary, the LBT is preferably configured at the time.
  • the LBT resource is configured in the header of the frame, so that all UEs that are successfully scheduled in the configured LBT subframe are preferably not sent in the LBT resource configured in the header of the subframe, and the LBT operation is performed, and the UE accessing the channel is performed. That is, the uplink transmission is performed; the LBT resource may be located at the head or the tail of the LBT subframe, and may not be excluded from other locations in the subframe.
  • the base station semi-statically indicates that resources for performing LBT operations are reserved in a certain subset of all uplink subframes or uplink subframes through non-physical layer signaling.
  • a specific available method is that the uplink subframe used by the UE to perform the LBT operation can be configured by non-physical layer signaling, and the non-physical layer signaling is adopted.
  • the base station may configure the LBT subframe and the resources for the LBT in the LBT subframe every N subframes, or configure the LBT subframes at different intervals according to the scheduling requirements, and the configured LBT resource size is preferred. It can be an integer number of SC-FDM symbol lengths or a non-integer number of SC-FDM symbols.
  • the configured LBT resource location may be located at the head of the configured LBT subframe or at the end of the allocated LBT subframe. When the starting point of the UL signal transmission is located at the subframe boundary, the LBT is preferably configured at this time.
  • the LBT resource is configured at the end of the subframe, and the UE that is transmitting the signal on the LBT subframe needs to stop transmitting the signal in the LBT resource configured at the end of the subframe, and then all the UEs that successfully receive the UL grant corresponding to the next subframe are in the
  • the LBT operation is performed in the LBT resource of the configured LBT subframe, and the UE accessing the channel performs uplink transmission; when the starting point of the UL signal transmission is not located at the subframe boundary, it is preferably at the head of the configured LBT subframe.
  • the LBT resource is configured, so that all UEs that are successfully scheduled in the configured LBT subframe do not send signals in the LBT resources configured in the header of the subframe, and the LBT operation is performed, and the UE accessing the channel performs uplink transmission.
  • the location of the LBT resource may be in the LBT subframe header and trailer, and does not exclude other locations within the LBT subframe.
  • Figure 9 shows a more specific example of a semi-static configuration. It is assumed that the LBT mode is taken as an example of LBT category 2 (other access methods are not excluded, and the described method is equally applicable to other access modes other than category 2).
  • the LBT subframe is configured as a SRS (Sounding Reference Symbol) subframe, that is, an LBT subframe, by using RRC (Radio Resource Control) signaling.
  • SRS Sounding Reference Symbol
  • RRC Radio Resource Control
  • the last SC-FDM symbol is not used for data transmission, and the base station does not actually schedule the SRS.
  • the LBT resource is the last SC-FDM symbol of the LBT subframe, and is used for channel scheduling for the successfully scheduled UE.
  • the base station dynamically indicates, by using physical layer signaling, resources reserved for performing LBT operations on all uplink subframes or a subset of uplink subframes.
  • the UE by adding 1 bit in the UL grant, it is notified whether the UE needs to reserve resources in the PUSCH scheduled by the secondary UL grant (the specific reserved symbol resource is, for example, the last /N symbols, or the previous one/ N symbols, these changes are allowed).
  • a feasible method is: the base station dynamically indicates the uplink subframe where the reserved resource is located by using the physical layer signaling, and configures the resource used for the LBT operation on the LBT subframe by using signaling indication and/or a pre-agreed method.
  • a preferred implementation method for the base station to dynamically indicate the uplink subframe where the reserved resource is located by using the physical layer signaling is to add a bit in the dynamic signaling UL grant to notify whether the PUSCH scheduled for the secondary UL grant needs to reserve resources. Used to perform LBT operations.
  • the base station configures the LBT subframe and the resource for the LBT in the LBT subframe according to the scheduling requirement, or the unequal interval.
  • the configured LBT resource size may be an integer number of SC-FDM symbol lengths.
  • the configured LBT resource location can be located in the configured LBT
  • the header of the subframe may also be located at the end of the configured LBT subframe.
  • the starting point of the UL signal transmission is located at the subframe boundary, it is preferable to configure the LBT resource at the end of the configured LBT subframe, in the LBT subframe.
  • the UE that is transmitting the signal needs to stop transmitting the signal in the LBT resource configured at the end of the subframe, and then all the UEs that successfully receive the UL grant corresponding to the next subframe perform the LBT operation in the LBT resource of the configured LBT subframe.
  • the UE accessing the channel performs uplink transmission; when the starting point of the UL signal transmission is not located at the subframe boundary, it is preferable to configure the LBT resource at the head of the configured LBT subframe, so that the configured LBT subframe is configured. All UEs that are successfully scheduled do not send signals in the LBT resources configured in the header of the subframe, and the LBT operation is performed, and the UE accessing the channel performs uplink transmission; the location of the LBT resource may be in the LBT subframe. The head and tail are not excluded from other locations within the LBT sub-frame.
  • Figure 10 shows a more specific example of dynamic configuration.
  • the required uplink subframe is dynamically configured into an LBT subframe by using a physical layer PDCCH or a UL grant-bearing UL grant, and the signal start position is assumed to be a subframe boundary, and the last M SC-s of the LBT subframe are instructed by the UL grant or agreed in advance.
  • the FDM symbol is used to perform LBT operation, and the successfully accessed UE performs signal transmission.
  • the N and M in the embodiment of the present application are preset positive integers.
  • an apparatus for scheduling an uplink transmission resource which is provided by the embodiment of the present application, includes:
  • the reservation unit 11 is configured to determine a reserved resource in the uplink subframe, where the reserved resource is a transmission resource on the unlicensed carrier;
  • the notification unit 12 is configured to send a notification of the reserved resource in the uplink subframe to the user equipment.
  • the notification unit sends the notification of the reserved resource in the uplink subframe to the user equipment in a semi-static or dynamic manner.
  • the notification unit when the notification unit sends the notification of the reserved resource in the uplink subframe to the user equipment in a semi-static manner, the notification unit sends the notification of the reserved resource in the uplink subframe to the user equipment by using the non-physical layer signaling.
  • the notification unit sends the notification of the reserved resource in the uplink subframe to the user equipment in a dynamic manner
  • the notification unit sends the notification of the reserved resource in the uplink subframe to the user equipment by using physical layer signaling.
  • the reserved resource is used by the user equipment to perform the LBT operation after listening first.
  • the notification carries one or a combination of the following information:
  • the user equipment needs to reserve the indication information of the resource in the uplink subframe.
  • the size of the reserved resource in the uplink subframe containing the reserved resource is the size of the reserved resource in the uplink subframe containing the reserved resource.
  • the reserved resource is located at a head or a tail of at least one uplink subframe.
  • an uplink transmission apparatus provided by an embodiment of the present application includes:
  • the first unit 21 is configured to determine a reserved resource in the uplink subframe, where the reserved resource is a transmission resource on the unlicensed carrier;
  • the second unit 22 is configured to determine, in the reserved resource, that no uplink signal transmission is performed.
  • the second unit is also used to:
  • the LBT operation is performed after the resource is reserved for listening first;
  • the uplink signal is transmitted on the uplink resource scheduled by the base station.
  • the reserved resources in the uplink subframe determined by the first unit are pre-configured
  • the first unit receives the notification of the reserved resource in the uplink subframe sent by the base station in a semi-static or dynamic manner, and determines the reserved resource in the uplink subframe by using the notification.
  • another uplink transmission resource scheduling apparatus provided by the embodiment of the present application includes:
  • the processor 500 is configured to read a program in the memory 520 and perform the following process:
  • the notification of the reserved resources in the uplink subframe is sent to the user equipment by the transceiver 510.
  • the processor 500 sends a notification of the reserved resource in the uplink subframe to the user equipment by using the transceiver 510 in a semi-static or dynamic manner.
  • the processor 500 when the processor 500 sends the notification of the reserved resource in the uplink subframe to the user equipment in the semi-static manner, the processor 500 sends the uplink to the user equipment by using the non-physical layer signaling by the transceiver 510. Notification of reserved resources in a subframe;
  • the processor 500 sends a notification of the reserved resource in the uplink subframe to the user equipment in a dynamic manner
  • the processor 500 sends the reservation in the uplink subframe to the user equipment through the physical layer signaling by the transceiver 510. Notification of resources.
  • the reserved resource is used by the user equipment to perform the LBT operation after listening first.
  • the notification carries one or a combination of the following information:
  • the user equipment needs to reserve the indication information of the resource in the uplink subframe.
  • the size of the reserved resource in the uplink subframe containing the reserved resource is the size of the reserved resource in the uplink subframe containing the reserved resource.
  • the reserved resource is located at a head or a tail of at least one uplink subframe.
  • the transceiver 510 is configured to receive and transmit data under the control of the processor 500.
  • the bus architecture may include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 500 and various circuits of memory represented by memory 520.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 510 There may be multiple components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 can store data used by the processor 500 when performing operations.
  • another uplink transmission apparatus provided by the embodiment of the present application includes:
  • the processor 600 is configured to read a program in the memory 620 and perform the following process:
  • the reserved resources are determined not to perform uplink signal transmission.
  • processor 600 is further configured to:
  • the LBT operation is performed after the resource is reserved for listening first;
  • the uplink signal is transmitted on the uplink resource scheduled by the base station.
  • the reserved resources in the uplink subframe determined by the processor 600 are pre-configured;
  • the processor 600 receives, by the transceiver 610, a notification of the reserved resource in the uplink subframe that is sent by the base station in a semi-static or dynamic manner, and determines the reserved resource in the uplink subframe by using the notification.
  • the transceiver 610 is configured to receive and transmit data under the control of the processor 600.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 600 and various circuits of memory represented by memory 620.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 610 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the user interface 630 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 can store data used by the processor 600 in performing operations.
  • the UE needs time division multiplexing from the scheduling flexibility, and the maximum allowable maximum channel occupation time is relatively short, and the UL subframes are relatively large.
  • a UE that receives a UL grant needs to perform an LBT operation before transmitting uplink data as long as it does not access the channel.
  • a UE that has accessed the channel and is transmitting a signal blocks its UE access. Therefore, the base station needs to configure a subframe for the LBT operation for the UE, and the LBT resource, which is located at any position of the LBT resource in the LBT subframe. necessary.
  • the prior art does not have a clear implementation scheme.
  • the solution provided by the embodiment of the present application can implement flexible time division multiplexing of the LTE uplink in the unlicensed band.

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Abstract

本申请公开了一种上行传输资源调度及上行传输方法、装置，用以实现非授权载波上的上行传输资源的预留，使得UE在该预留资源不进行上行信号传输，避免被调度UE无法接入信道，并且可以实现非授权载波上的上行传输资源的时分复用。本申请提供的一种上行传输资源调度方法，包括：基站确定上行子帧中的预留资源，所述预留资源为非授权载波上的传输资源；所述基站向用户设备发送所述上行子帧中的预留资源的通知。

Description

一种上行传输资源调度及上行传输方法、装置
本申请要求在2015年9月25日提交中国专利局、申请号为201510625037.8、申请名称为“一种上行传输资源调度及上行传输方法、装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种上行传输资源调度及上行传输方法、装置。
背景技术
随着移动数据业务量的不断增长，频谱资源越来越紧张，仅使用授权频谱资源进行网络部署和业务传输可能已经不能满足业务量需求，因此LTE(Long Term Evolution，长期演进)***可以考虑在非授权频谱资源上部署传输，可以称这种LTE***为U-LTE或者LTE-U(Unlicensed LTE，非授权LTE)***，以提高UE体验和扩展覆盖。但是，目前LTE***如何在非授权频谱资源上工作还没有明确的方案。
非授权频谱没有规划具体的应用***，可以为多种无线通信***如蓝牙、WIFI(无线局域网)等共享，多种***间通过抢占资源的方式使用共享的非授权频谱资源。故不同运营商部署的LTE-U之间及LTE-U与WIFI等无线通信***的共存性是研究的一个重点与难点。3GPP要求保证LTE-U与WIFI等无线通信***的公平共存，非授权频段作为辅载波由授权频段的主载波辅助实现。与授权频段LTE不同，非授权频段LTE-U的UE在发送数据之前需要执行LBT(Listen Before Talk，先听后说)操作，在非授权频段进行时分复用时，正在发送信号的UE(User Equipment，用户设备)必然会阻塞后面被调度UE接入信道。
综上所述，现有技术没有给出非授权频谱资源的调度及使用方案。
发明内容
本申请实施例提供了一种上行传输资源调度及上行传输方法、装置，用以实现非授权载波上的上行传输资源的预留，使得UE在该预留资源不进行上行信号传输，避免被调度UE无法接入信道，并且可以实现非授权载波上的上行传输资源的时分复用。
本申请实施例提供的一种上行传输资源调度方法，包括：
基站确定上行子帧中的预留资源，所述预留资源为非授权载波上的传输资源；
所述基站向用户设备发送所述上行子帧中的预留资源的通知。
通过该方法，基站确定上行子帧中的预留资源，所述预留资源为非授权载波上的传输 资源，所述基站向用户设备发送所述上行子帧中的预留资源的通知，从而实现了非授权载波上的上行传输资源的预留，使得UE在该预留资源不进行上行信号传输，避免被调度UE无法接入信道，并且可以实现非授权载波上的上行传输资源的时分复用。
可选的，所述基站通过半静态或动态的方式，向用户设备发送所述上行子帧中的预留资源的通知。
可选的，所述基站通过半静态的方式向用户设备发送所述上行子帧中的预留资源的通知时，所述基站通过非物理层信令向用户设备发送所述上行子帧中的预留资源的通知；
所述基站通过动态的方式向用户设备发送所述上行子帧中的预留资源的通知时，所述基站通过物理层信令向用户设备发送所述上行子帧中的预留资源的通知。
可选的，所述预留资源用于用户设备进行先听后说LBT操作。
可选的，所述通知中携带有如下信息之一或组合：
用户设备需要在上行子帧中预留资源的指示信息；
所述预留资源所处的上行子帧，以及在上行子帧中的位置；
在包含预留资源的上行子帧中的预留资源的大小。
可选的，所述预留资源位于至少一个上行子帧的头部或尾部。
本申请实施例提供的一种上行传输方法，包括：
用户设备确定上行子帧中的预留资源，所述预留资源为非授权载波上的传输资源；
所述用户设备在所述预留资源确定不进行上行信号传输。
可选的，该方法还包括:
所述用户设备当未接入信道时，在所述预留资源进行先听后说LBT操作；
或者，所述用户设备当接入信道时，在基站调度的上行资源上进行上行信号传输。
可选的，所述上行子帧中的预留资源是预先配置好的；
或者，所述用户设备接收基站通过半静态或动态的方式发送的所述上行子帧中的预留资源的通知，通过该通知确定所述上行子帧中的预留资源。
本申请实施例提供的一种上行传输资源调度装置，包括：
预留单元，用于确定上行子帧中的预留资源，所述预留资源为非授权载波上的传输资源；
通知单元，用于向用户设备发送所述上行子帧中的预留资源的通知。
可选的，所述通知单元通过半静态或动态的方式，向用户设备发送所述上行子帧中的预留资源的通知。
可选的，所述通知单元通过半静态的方式向用户设备发送所述上行子帧中的预留资 源的通知时，所述通知单元通过非物理层信令向用户设备发送所述上行子帧中的预留资源的通知；
所述通知单元通过动态的方式向用户设备发送所述上行子帧中的预留资源的通知时，所述通知单元通过物理层信令向用户设备发送所述上行子帧中的预留资源的通知。
可选的，所述预留资源用于用户设备进行先听后说LBT操作。
可选的，所述通知中携带有如下信息之一或组合：
用户设备需要在上行子帧中预留资源的指示信息；
所述预留资源所处的上行子帧，以及在上行子帧中的位置；
在包含预留资源的上行子帧中的预留资源的大小。
可选的，所述预留资源位于至少一个上行子帧的头部或尾部。
本申请实施例提供的一种上行传输装置，包括：
第一单元，用于确定上行子帧中的预留资源，所述预留资源为非授权载波上的传输资源；
第二单元，用于在所述预留资源确定不进行上行信号传输。
可选的，所述第二单元还用于:
当所述装置所属的用户设备未接入信道时，在所述预留资源进行先听后说LBT操作；
或者，当所述装置所属的用户设备接入信道时，在基站调度的上行资源上进行上行信号传输。
可选的，所述第一单元确定的所述上行子帧中的预留资源是预先配置好的；
或者，所述第一单元接收基站通过半静态或动态的方式发送的所述上行子帧中的预留资源的通知，通过该通知确定所述上行子帧中的预留资源。
附图说明
图1为本申请实施例提供的WIFI***在非授权频谱上的抢占资源方式示意图；
图2为本申请实施例提供的一种信道接入机制示意图；
图3为本申请实施例提供的另一种信道接入机制示意图；
图4为本申请实施例提供的第一类帧结构示意图；
图5为本申请实施例提供的第二类帧结构示意图；
图6为本申请实施例提供的一种上行传输资源调度方法的流程示意图；
图7为本申请实施例提供的一种上行传输方法的流程示意图；
图8为本申请实施例提供的通过静态配置方式确定的预留资源示意图；
图9为本申请实施例提供的通过半静态配置方式确定的预留资源示意图；
图10为本申请实施例提供的通过动态配置方式确定的预留资源示意图；
图11为本申请实施例提供的一种上行传输资源调度装置的结构示意图；
图12为本申请实施例提供的一种上行传输装置的结构示意图；
图13为本申请实施例提供的另一种上行传输资源调度装置的结构示意图；
图14为本申请实施例提供的另一种上行传输装置的结构示意图。
具体实施方式
本申请实施例提供了一种上行传输资源调度及上行传输方法、装置，用以实现非授权载波上的上行传输资源的预留，使得UE在该预留资源不进行上行信号传输，避免被调度UE无法接入信道，并且可以实现非授权载波上的上行传输资源的时分复用。
本申请实施例中的LBT，作为LTE-U竞争接入的基本手段。LBT技术的本质仍然是802.11***采用载波监听/冲突避免(CSMA/CA)机制，WIFI***在非授权频谱上的抢占资源方式，如图1所示，包括：首先，对信道进行监听，当信道空闲时间达到DIFS(Distributed Inter-Frame Space，帧间分布距离)，便判断当前信道为空闲信道，然后各个等待接入的信道的站点，便进入一个随机回退阶段，用于避免多个站点在相同的资源发生碰撞。此外，为了保证公平性，还规定每个站点不能长期占用频谱资源，到达一定时间或数据传输量上限时，需要释放资源，以供其他WIFI或LTE***抢占资源。
为了提供一个灵活的公平的自适应信道接入机制，欧洲要求在非授权的5150-5350MHz与5470-5725MHz频段采用LBT技术。CCA(Clear Channel Assessment，空闲信道评估)利用能量检测来判断当前信道是否有信号传输，从而确定信道是否被占用。
欧洲的ETSI规范了5GHz的非授权频段的LBT的两种方式，分别如图2和图3所示：基于帧的设备(Frame Based Equipment，)方式与FBE(Load Based Equipment，基于负载的设备)方式。
参见图2，FBE接入在固定的帧结构位置执行CCA检测只要信道有一个CCA周期(不低于20us)判断为空就立刻接入信道，发起数据传输过程，信道传输时间占用时间相对固定，最小1ms，最大10ms，空闲周期应该至少为信道占用时间的5％，在空闲周期的尾部的CCA时间内设备执行新的CCA检测再次接入信道。在FBE机制中信道占用时间加空闲(idle)周期是一个固定值称为帧周期(frame period)。
参见图3，LBE接入机制类似于WIFI的CSMA/CA机制，每次传输对信道的占用时间与起点都是可变的，在获取信道之前要进行扩展CCA检测，首先根据CW(Contention  Window，竞争窗口)的大小q，产生一个随机的因子N，直到信道空闲时间达到CCA时间的N倍，且信道为闲，才接入信道，发起数据传输过程，最大的信道占用时间为13ms。ETSI LBE分为选项(option)A与option B两种选项，其中ETSI option B竞争窗口是固定的，是最基本的LBE形式。
LTE***支持FDD和TDD两种双工方式，两种双工模式使用不同的帧结构。两种帧结构的共同点是每个无线帧由10个1ms子帧组成。FDD***使用第一类帧结构如图4所示，TDD***使用第二类帧结构，如图5所示。
3GPP目前针对LBT定义了四种种类：
LBT种类(category)1，即不需要LBT；
LBT category 2，即具有固定的回退值，在传输数据块(burst)之前不需随机回退，只执行一个单个CCA检测即接入信道，FBE是LBT category 2的一种特例；
LBT category 3与LBT category 4都采用类似于CSMA/CA的随机的回退值，LBT category 3采用固定的竞争窗口，ETSI LBE option B就属于LBT category 3；
而LBT category 4是基于ETSI LBE option B修正，采用基于负载(load)的LBT，而且竞争窗口是指数增加的或者半静态配置的。由于WIFI采用CSMA/CA接入机制时采用竞争窗口指数扩大的方式。为了实现LTE-U与WIFI的公平共存，3GPP要求至少在LTE-U的下行传输中应该采用LBT category 4，而LTE-U上行LBT方案4个category皆有可能，目前未有结论。
无论UL(上行链路)传输采用何种信道接入机制，被调度的UE都可能需要在多个上行传输子帧之中进行时分复用，一种情形，例如某些UE的上行数据发送时间长，例如多个子帧，另外一些UE的数据却仅需要很短的发送时间，例如一个子帧；另外一种情形，某些地区或者国家规定的UE最大信道占用时间(Maximum channel occupied time)若低于配置的上行子帧数目，不同的UE在上行子帧内时分复用就成为必须要解决的问题。
与授权频段LTE不同，非授权频段LTE-U的UE在发送数据之前需要执行LBT操作，在非授权频段进行时分复用时，正在发送信号UE必然会阻塞后面被调度UE接入信道，而目前LTE-U上行传输中如何进行多UE时分复用，时分复用时如何为新接入UE进行LBT预留资源目前都没有任何方案。
因此，本申请实施例提出一种在非授权频段，UL多UE时分复用时，配置UE为LBT或其他操作而预留资源的方法，其具体方案介绍如下：
参见图6，本申请实施例提供的一种上行传输资源调度方法，包括：
S101、基站确定上行子帧中的预留资源，预留资源为非授权载波上的传输资源；
S102、基站向用户设备发送上行子帧中的预留资源的通知。
通过该方法，基站确定上行子帧中的预留资源，预留资源为非授权载波上的传输资源，基站向用户设备发送上行子帧中的预留资源的通知，从而实现了非授权载波上的上行传输资源的预留，使得UE在该预留资源不进行上行信号传输，避免被调度UE无法接入信道，并且可以实现非授权载波上的上行传输资源的时分复用。
其中，可以通过静态、半静态或者动态的方式配置被调度的UE在上行子帧中预留用于LBT等操作的资源。
可选的，基站通过半静态或动态的方式，向用户设备发送上行子帧中的预留资源的通知。
可选的，基站通过半静态的方式向用户设备发送上行子帧中的预留资源的通知时，基站通过非物理层信令向用户设备发送上行子帧中的预留资源的通知；
基站通过动态的方式向用户设备发送上行子帧中的预留资源的通知时，基站通过物理层信令向用户设备发送上行子帧中的预留资源的通知。
可选的，预留资源用于用户设备进行先听后说LBT操作。
可选的，通知中携带有如下信息之一或组合：
用户设备需要在上行子帧中预留资源的指示信息；
预留资源所处的上行子帧，以及在上行子帧中的位置；
在包含预留资源的上行子帧中的预留资源的大小。
其中，用户设备需要在上行子帧中预留资源的指示信息，例如，通过UL grant中增加1bit告知UE该次UL grant调度的PUSCH中是否需要预留资源(具体预留的符号资源例如是最后一个或N个符号，或者前面的一个或N个符号，这些变化都适用)。
在包含预留资源的上行子帧中的预留资源的大小，可以预先约定，也可以通过信令通知。
可选的，预留资源位于至少一个上行子帧的头部或尾部，预留资源位于可以位于一个上行子帧中，也可以位于多个上行子帧中，可以位于上行子帧的头部、中间或尾部。
例如，基站与UE每隔N个子帧配置一次LBT子帧及该LBT子帧中用于LBT的资源，当然也可以不等间隔的配置LBT子帧，LBT子帧的个数也未必是一个。
相应地，UE根据基站的配置在相应的预留资源上不发送信号；所有正确接收到UL grant(半静态调度或动态调度中所采用的信令)的被调度UE在基站配置的用于LBT的预留资源上执行LBT操作；接入信道的UE在被调动的上行资源上进行上行信号传输。
参见图7，本申请实施例提供的一种上行传输方法，包括：
S201、用户设备确定上行子帧中的预留资源，预留资源为非授权载波上的传输资源；
S202、用户设备在预留资源确定不进行上行信号传输。
可选的，该方法还包括:
用户设备当未接入信道时，在预留资源进行先听后说LBT操作；
或者，用户设备当接入信道时，在基站调度的上行资源上进行上行信号传输。
可选的，上行子帧中的预留资源是预先配置的；
或者，用户设备接收基站通过半静态或动态的方式发送的上行子帧中的预留资源的通知，通过该通知确定上行子帧中的预留资源。
在一个实施例中，若采用静态配置方法，基站与UE约定(没有信令指示)在所有上行子帧或者上行子帧的某个子集上(即部分上行子帧中)，预留用于执行LBT操作的资源。具体的一种可用方法为可约定预留的用于LBT的资源所在的上行子帧，该子帧定义为LBT子帧(该定义对所有实施例都适用，后面不再赘述)，并且约定这些配置的LBT子帧上需要预留的用于LBT操作的资源(至少包括位置与大小)。如图8所示，基站与UE每隔N个子帧配置一次LBT子帧及LBT子帧中用于LBT的资源(当然也可以不等间隔的配置LBT子帧，LBT子帧的个数也未必是一个，每个UE采用的TTI(Transmission Time Interval，传输时间间隔)的大小可以小于1或者等于1，或者大于1，本描述对所有实施例都适用，后面不再赘述)，假定采用的LBT方式为LBT category 2，即发送UL burst之前只进行一个CCA检测(并不排除其他接入方式，所叙述的方法对category 2以外的其它接入方式同样适用)，所配置的LBT资源大小较佳的可以是整数个SC-FDM符号长度，也可以是为非整数个SC-FDM符号长度。所配置的LBT资源位置可以位于所配置LBT子帧的头部也可以位于LBT子帧的尾部，当UL信号传输的起点位于子帧边界时，此时较佳的在LBT子帧的尾部为需要接入的新UE配置用于LBT的资源，在LBT子帧上正在传输信号的UE需要在子帧末尾所配置的LBT资源内停止发送信号，然后所有成功接收到下一个子帧对应的UL grant的UE都在相应的LBT子帧的LBT资源内执行LBT操作，接入信道的UE即进行上行传输；当UL信号传输的起点不位于子帧边界时，此时较佳的在所配置LBT子帧的头部配置LBT资源，这样在所配置的LBT子帧被成功调度的所有UE较佳的在子帧的头部所配置的LBT资源内不发送信号，执行LBT操作，接入信道的UE即进行上行传输；LBT资源除了可以位于配置LBT子帧头部或者尾部，也不排除可以位于子帧内其他位置。
在一个实施例中，若采用半静态配置方法，基站通过非物理层信令半静态指示在所有上行子帧或者上行子帧的某个子集预留用于执行LBT操作的资源。具体的一种可用方法为，可通过非物理层信令配置UE用于执行LBT操作的上行子帧，并且通过非物理层信令 指示和/或预先约定的方法，配置在LBT子帧上用于LBT的资源(至少包括位置与大小)。比如基站可以每隔N个子帧配置一次LBT子帧及该LBT子帧中用于LBT的资源，也可以根据调度的需要不等间隔的配置LBT子帧，所配置的LBT资源大小，较佳的，可以是整数个SC-FDM符号长度，也可以是为非整数个SC-FDM符号长度。所配置的LBT资源位置可以位于所配置的LBT子帧的头部，也可以位于所配LBT子帧的尾部，当UL信号传输的起点位于子帧边界时，此时较佳的在所配置LBT子帧的尾部配置LBT资源，在LBT子帧上正在传输信号的UE需要在子帧末尾配置的LBT资源内停止发送信号，然后所有成功接收到下一个子帧对应的UL grant的UE都在所配置的LBT子帧的LBT资源内执行LBT操作，接入信道的UE即进行上行传输；当UL信号传输的起点不位于子帧边界时，此时较佳的在所配置LBT子帧的头部配置LBT资源，这样在所配置的LBT子帧被成功调度的所有UE较佳的在子帧的头部所配置的LBT资源内不发送信号，执行LBT操作，接入信道的UE即进行上行传输；LBT资源的位置除了可在LBT子帧头部与尾部，也不排除位于LBT子帧内其他位置。图9表示一个更具体的一个半静态配置例子，假定采用的LBT方式以LBT category 2为例(并不排除其他接入方式，所叙述的方法对category 2以外的其它接入方式同样适用)，即发送UL burst之前只进行一个CCA检测，可采用高层RRC(Radio Resource Control，无线资源控制)信令，将LBT子帧配置成SRS(Sounding Reference Symbol，探测参考符号)子帧，即LBT子帧的最后一个SC-FDM符号不用于数据传输，基站也不真正调度SRS，即LBT资源是LBT子帧的最后一个SC-FDM符号，用于成功调度的UE进行信道接入。
在一个实施例中，若采用动态配置方法，基站通过物理层信令动态指示在所有上行子帧，或者上行子帧的某个子集上预留用于执行LBT操作的资源。
在动态配置的实施例中，通过UL grant中增加1bit告知UE该次UL grant调度的PUSCH中是否需要预留资源(具体预留的符号资源例如是最后一个/N个符号，或者前面的一个/N个符号，这些变化都允许)。
一种可行的方法为：基站通过物理层信令动态指示预留资源所在的上行子帧，并且通过信令指示和/或预先约定的方法，配置在LBT子帧上用于LBT操作的资源。基站通过物理层信令动态指示预留资源所在上行子帧的一种较佳的具体实现方法为，在动态信令UL grant中增加一个比特告知该次UL grant调度的PUSCH中是否需要预留资源用于执行LBT操作。基站根据调度的需要等间隔或者不等间隔在UL子帧中配置LBT子帧及该LBT子帧中用于LBT的资源，所配置的LBT资源大小较佳的可以是整数个SC-FDM符号长度，也可以是为非整数个SC-FDM符号长度。所配置的LBT资源位置可以位于所配置的LBT 子帧的头部也可以位于所配置LBT子帧的尾部，当UL信号传输的起点位于子帧边界时，此时较佳的，在所配置LBT子帧的尾部配置LBT资源，在LBT子帧上正在传输信号的UE需要在子帧末尾配置的LBT资源内停止发送信号，然后所有成功接收到下一个子帧对应的UL grant的UE都在所配置的LBT子帧的LBT资源内执行LBT操作，接入信道的UE即进行上行传输；当UL信号传输的起点不位于子帧边界时，此时较佳的在所配置LBT子帧的头部配置LBT资源，这样在所配置的LBT子帧被成功调度的所有UE，较佳的在子帧的头部所配置的LBT资源内不发送信号，执行LBT操作，接入信道的UE即进行上行传输；LBT资源的位置除了可在LBT子帧头部与尾部，也不排除位于LBT子帧内其他位置。图10表示一个更具体的一个动态配置例子，假定采用的LBT方式以LBT category 4为例(并不排除其他接入方式，所叙述的方法对category 4以外的其它接入方式同样适用)，可采用物理层PDCCH或ePDCCH承载的UL grant将所需要的上行子帧动态配置成LBT子帧，假定信号起始位置为子帧边界，由UL grant指示或者提前约定LBT子帧的最后M个SC-FDM符号用于执行LBT操作，成功接入的UE进行信号传输。
其中，本申请实施例中的N和M为预设的正整数。
参见图11，在基站侧，本申请实施例提供的一种上行传输资源调度装置，包括：
预留单元11，用于确定上行子帧中的预留资源，预留资源为非授权载波上的传输资源；
通知单元12，用于向用户设备发送上行子帧中的预留资源的通知。
可选的，通知单元通过半静态或动态的方式，向用户设备发送上行子帧中的预留资源的通知。
可选的，通知单元通过半静态的方式向用户设备发送上行子帧中的预留资源的通知时，通知单元通过非物理层信令向用户设备发送上行子帧中的预留资源的通知；
通知单元通过动态的方式向用户设备发送上行子帧中的预留资源的通知时，通知单元通过物理层信令向用户设备发送上行子帧中的预留资源的通知。
可选的，预留资源用于用户设备进行先听后说LBT操作。
可选的，通知中携带有如下信息之一或组合：
用户设备需要在上行子帧中预留资源的指示信息；
预留资源所处的上行子帧，以及在上行子帧中的位置；
在包含预留资源的上行子帧中的预留资源的大小。
可选的，预留资源位于至少一个上行子帧的头部或尾部。
参见图12，在UE侧，本申请实施例提供的一种上行传输装置，包括：
第一单元21，用于确定上行子帧中的预留资源，预留资源为非授权载波上的传输资源；
第二单元22，用于在预留资源确定不进行上行信号传输。
可选的，第二单元还用于:
当装置所属的用户设备未接入信道时，在预留资源进行先听后说LBT操作；
或者，当装置所属的用户设备接入信道时，在基站调度的上行资源上进行上行信号传输。
可选的，第一单元确定的上行子帧中的预留资源是预先配置好的；
或者，第一单元接收基站通过半静态或动态的方式发送的上行子帧中的预留资源的通知，通过该通知确定上行子帧中的预留资源。
参见图13，在基站侧，本申请实施例提供的另一种上行传输资源调度装置，包括：
处理器500，用于用于读取存储器520中的程序，执行下列过程：
确定上行子帧中的预留资源，预留资源为非授权载波上的传输资源；
通过收发机510向用户设备发送上行子帧中的预留资源的通知。
可选的，处理器500通过收发机510通过半静态或动态的方式，向用户设备发送上行子帧中的预留资源的通知。
可选的，处理器500通过收发机510通过半静态的方式向用户设备发送上行子帧中的预留资源的通知时，处理器500通过收发机510通过非物理层信令向用户设备发送上行子帧中的预留资源的通知；
处理器500通过收发机510通过动态的方式向用户设备发送上行子帧中的预留资源的通知时，处理器500通过收发机510通过物理层信令向用户设备发送上行子帧中的预留资源的通知。
可选的，预留资源用于用户设备进行先听后说LBT操作。
可选的，通知中携带有如下信息之一或组合：
用户设备需要在上行子帧中预留资源的指示信息；
预留资源所处的上行子帧，以及在上行子帧中的位置；
在包含预留资源的上行子帧中的预留资源的大小。
可选的，预留资源位于至少一个上行子帧的头部或尾部。
收发机510，用于在处理器500的控制下接收和发送数据。
其中，在图13中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器500代表的一个或多个处理器和存储器520代表的存储器的各种电路链接在一起。总线架构还可以将诸如***设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机510 可以是多个元件，即包括发送机和收发机，提供用于在传输介质上与各种其他装置通信的单元。处理器500负责管理总线架构和通常的处理，存储器520可以存储处理器500在执行操作时所使用的数据。
参见图14，在UE侧，本申请实施例提供的另一种上行传输装置，包括：
处理器600，用于读取存储器620中的程序，执行下列过程：
确定上行子帧中的预留资源，预留资源为非授权载波上的传输资源；
在预留资源确定不进行上行信号传输。
可选的，处理器600还用于:
当装置所属的用户设备未接入信道时，在预留资源进行先听后说LBT操作；
或者，当装置所属的用户设备接入信道时，在基站调度的上行资源上进行上行信号传输。
可选的，处理器600确定的上行子帧中的预留资源是预先配置好的；
或者，处理器600通过收发机610接收基站通过半静态或动态的方式发送的上行子帧中的预留资源的通知，通过该通知确定上行子帧中的预留资源。
收发机610，用于在处理器600的控制下接收和发送数据。
其中，在图14中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器600代表的一个或多个处理器和存储器620代表的存储器的各种电路链接在一起。总线架构还可以将诸如***设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机610可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元。针对不同的用户设备，用户接口630还可以是能够外接内接需要设备的接口，连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
处理器600负责管理总线架构和通常的处理，存储器620可以存储处理器600在执行操作时所使用的数据。
综上，在LTE-U的UL传输中，从调度灵活性上存在UE需要时分复用的需求，特别允许的最大信道占用时间比较短，而UL子帧比较多的场景。收到UL grant的UE只要没接入信道，就需要在发送上行数据前进行LBT操作。但是已经接入信道且正在发送信号的UE会阻塞它UE的接入，因此需要基站为UE配置用于LBT操作的子帧，与LBT资源，这对于LBT资源位于LBT子帧的任何位置都是必须的。而现有技术目前没有明确实现方案，本申请实施例提供的方案可以实现非授权频段LTE上行灵活的时分复用。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和 范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (18)

  1. 一种上行传输资源调度方法，其特征在于，该方法包括：
    基站确定上行子帧中的预留资源，其中所述预留资源为非授权载波上的传输资源；
    所述基站向用户设备发送所述上行子帧中的预留资源的通知。
  2. 根据权利要求1所述的方法，其特征在于，所述基站通过半静态或动态的方式，向用户设备发送所述上行子帧中的预留资源的通知。
  3. 根据权利要求2所述的方法，其特征在于，所述基站向用户设备发送所述上行子帧中的预留资源的通知，包括：
    所述基站通过半静态的方式向用户设备发送所述上行子帧中的预留资源的通知时，所述基站通过非物理层信令向用户设备发送所述上行子帧中的预留资源的通知；
    所述基站通过动态的方式向用户设备发送所述上行子帧中的预留资源的通知时，所述基站通过物理层信令向用户设备发送所述上行子帧中的预留资源的通知。
  4. 根据权利要求1所述的方法，其特征在于，所述预留资源用于用户设备进行先听后说LBT操作。
  5. 根据权利要求1所述的方法，其特征在于，所述通知中携带有如下信息之一或组合：
    用户设备需要在上行子帧中预留资源的指示信息；
    所述预留资源所处的上行子帧，以及在上行子帧中的位置；
    在包含预留资源的上行子帧中的预留资源的大小。
  6. 根据权利要求1所述的方法，其特征在于，所述预留资源位于至少一个上行子帧的头部或尾部。
  7. 一种上行传输方法，其特征在于，该方法包括：
    用户设备确定上行子帧中的预留资源，所述预留资源为非授权载波上的传输资源；
    所述用户设备在所述预留资源确定不进行上行信号传输。
  8. 根据权利要求7所述的方法，其特征在于，该方法还包括:
    所述用户设备当未接入信道时，在所述预留资源进行先听后说LBT操作；
    或者，所述用户设备当接入信道时，在基站调度的上行资源上进行上行信号传输。
  9. 根据权利要求7所述的方法，其特征在于，所述上行子帧中的预留资源是预先配置好的；
    或者，所述用户设备接收基站通过半静态或动态的方式发送的所述上行子帧中的预留资源的通知，通过该通知确定所述上行子帧中的预留资源。
  10. 一种上行传输资源调度装置，其特征在于，包括：
    预留单元，用于确定上行子帧中的预留资源，所述预留资源为非授权载波上的传输资源；
    通知单元，用于向用户设备发送所述上行子帧中的预留资源的通知。
  11. 根据权利要求10所述的装置，其特征在于，所述通知单元具体用于：
    通过半静态或动态的方式，向用户设备发送所述上行子帧中的预留资源的通知。
  12. 根据权利要求11所述的装置，其特征在于，所述通知单元具体用于：
    通过半静态的方式向用户设备发送所述上行子帧中的预留资源的通知时，所述通知单元通过非物理层信令向用户设备发送所述上行子帧中的预留资源的通知；
    通过动态的方式向用户设备发送所述上行子帧中的预留资源的通知时，所述通知单元通过物理层信令向用户设备发送所述上行子帧中的预留资源的通知。
  13. 根据权利要求10所述的装置，其特征在于，所述预留资源用于用户设备进行先听后说LBT操作。
  14. 根据权利要求10所述的装置，其特征在于，所述通知中携带有如下信息之一或组合：
    用户设备需要在上行子帧中预留资源的指示信息；
    所述预留资源所处的上行子帧，以及在上行子帧中的位置；
    在包含预留资源的上行子帧中的预留资源的大小。
  15. 根据权利要求10所述的装置，其特征在于，所述预留资源位于至少一个上行子帧的头部或尾部。
  16. 一种上行传输装置，其特征在于，包括：
    第一单元，用于确定上行子帧中的预留资源，所述预留资源为非授权载波上的传输资源；
    第二单元，用于在所述预留资源确定不进行上行信号传输。
  17. 根据权利要求16所述的装置，其特征在于，所述第二单元还用于:
    当所述装置所属的用户设备未接入信道时，在所述预留资源进行先听后说LBT操作；
    或者，当所述装置所属的用户设备接入信道时，在基站调度的上行资源上进行上行信号传输。
  18. 根据权利要求16所述的装置，其特征在于，所述第一单元确定的所述上行子帧中的预留资源是预先配置好的；
    或者，所述第一单元接收基站通过半静态或动态的方式发送的所述上行子帧中的预留 资源的通知，通过该通知确定所述上行子帧中的预留资源。
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