WO2012130179A1 - 时分双工系统中子帧配置的方法、基站及用户设备 - Google Patents

时分双工系统中子帧配置的方法、基站及用户设备 Download PDF

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Publication number
WO2012130179A1
WO2012130179A1 PCT/CN2012/073437 CN2012073437W WO2012130179A1 WO 2012130179 A1 WO2012130179 A1 WO 2012130179A1 CN 2012073437 W CN2012073437 W CN 2012073437W WO 2012130179 A1 WO2012130179 A1 WO 2012130179A1
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WIPO (PCT)
Prior art keywords
subframe
signaling
base station
downlink control
user equipment
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PCT/CN2012/073437
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English (en)
French (fr)
Inventor
李超君
吕永霞
范霄安
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP12764227.0A priority Critical patent/EP2693679B1/en
Priority to EP17167702.4A priority patent/EP3282793B1/en
Priority to EP20163224.7A priority patent/EP3723433A1/en
Publication of WO2012130179A1 publication Critical patent/WO2012130179A1/zh
Priority to US14/041,455 priority patent/US9491747B2/en
Priority to US15/286,219 priority patent/US10251168B2/en
Priority to US16/286,141 priority patent/US10681689B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/24Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2643Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
    • H04B7/2656Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA] for structure of frame, burst
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/14Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469Two-way operation using the same type of signal, i.e. duplex using time-sharing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446Resources in time domain, e.g. slots or frames
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08Access point devices

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, a base station, and a user equipment for configuring a subframe in a time division duplex system. Background technique
  • the Long Term Evolution (LTE) system supports the Time Division Duplexing (TDD) mode, that is, the uplink (UL, Uplink) and the downlink (DL, Downlink) use different time slots of the same frequency.
  • the LTE TDD system can be configured with a half-static configuration (Uplink-Downlink Configuration) to meet different uplink and downlink asymmetric service requirements.
  • the uplink and downlink ratios used are semi-statically configured and cannot be dynamically changed. This will cause the current uplink-downlink ratio to be mismatched with the instantaneous uplink and downlink traffic, so that resources cannot be effectively utilized, especially for the number of users. Less communities are particularly serious.
  • a dynamic TDD subframe matching concept is introduced, that is, some flexible subframes are configured in a radio frame, where each flexible subframe can be dynamically configured as an uplink subframe or a downlink subframe.
  • the embodiment of the present invention provides a method for configuring a subframe in a time division duplex system, a base station, and a user equipment, so as to solve the problem that the user equipment cannot know whether a flexible subframe is an uplink subframe or a downlink subframe in the prior art. The problem.
  • an embodiment of the present invention provides a method for configuring a subframe in a time division duplex system, where the method includes:
  • the base station sends the first signaling to the user equipment by using the downlink control channel, where the first signaling includes an attribute of the flexible subframe corresponding to the subframe number.
  • An embodiment of the present invention provides a base station, where the base station includes:
  • a unit processing unit 1 configured to determine a subframe number of the flexible subframe in the radio frame
  • a processing unit 2 configured to determine an attribute of the flexible subframe corresponding to the subframe number determined by the processing unit; the attribute indicates that the flexible subframe is an uplink subframe or a downlink subframe;
  • a sending unit configured to send the first signaling to the user equipment by using a downlink control channel, where the first signaling includes an attribute of the flexible subframe corresponding to the subframe number determined by the processing unit 2.
  • An embodiment of the present invention provides a method for configuring a subframe in a time division duplex system, where the method includes: acquiring, by a user equipment, a subframe number of a flexible subframe;
  • An embodiment of the present invention provides a user equipment, where the user equipment includes:
  • a processing unit 4 configured to determine a subframe number of the flexible subframe
  • a receiving unit configured to receive first signaling that is sent by the base station by using a downlink control channel, where the first information frame is an uplink subframe or a downlink subframe;
  • An acquiring unit configured to acquire the subframe number according to the first signaling received by the receiving unit Corresponding flexible sub-frame properties. .
  • the base station may notify the user equipment of the flexible subframe configuration, and notify the user equipment by using the downlink control channel, so that the user equipment can learn the attributes of the flexible subframe, and then flexibly according to the attributes thereof.
  • the sub-frame communicates normally with the base station.
  • FIG. 1 is a flowchart of Embodiment 1 of a method for configuring a subframe in a time division duplex system according to the present invention
  • FIG. 2 is a schematic diagram of a dynamic TDD subframe configuration in a radio frame according to the present invention
  • FIG. 3 is a flowchart of Embodiment 2 of a method for configuring a subframe in a time division duplex system according to the present invention
  • FIG. 4 is a schematic structural diagram of Embodiment 1 of a base station in a time division duplex system according to the present invention
  • FIG. 5 is a schematic structural diagram of a transmitting unit in an embodiment of a base station according to the present invention.
  • FIG. 6 is a schematic structural diagram of a transmitting unit in an embodiment of a base station according to the present invention.
  • FIG. 7 is a schematic structural diagram of a transmitting unit in an embodiment of a base station according to the present invention.
  • Embodiment 8 is a schematic structural diagram of Embodiment 2 of a base station in a time division duplex system according to the present invention.
  • FIG. 9 is a flowchart of Embodiment 3 of a method for configuring a subframe in a time division duplex system according to the present invention
  • FIG. 10 is a schematic structural diagram of Embodiment 1 of a user equipment in a time division duplex system according to the present invention
  • FIG. 12 is a schematic structural diagram of Embodiment 3 of a base station in a time division duplex system according to the present invention
  • FIG. 13 is a fourth embodiment of a base station in a time division duplex system according to the present invention
  • FIG. 10 is a schematic structural diagram of Embodiment 1 of a user equipment in a time division duplex system according to the present invention
  • FIG. 12 is a schematic structural diagram of Embodiment 3 of a base station in a time division duplex system according to the present invention
  • FIG. 13 is a fourth embodiment of a base station in a time division duplex system according to the present invention
  • FIG. 14 is a flowchart of Embodiment 5 of a method for configuring a subframe in a time division duplex system according to the present invention
  • 15 is a schematic structural diagram of a second embodiment of a user equipment in a time division duplex system according to the present invention
  • FIG. 16 is a schematic structural diagram of a third embodiment of a user equipment in a time division duplex system according to the present invention.
  • a total of seven uplink and downlink ratios are included, as shown in Table 1, where 'D, indicating a downlink subframe, 'U, indicating an uplink subframe, and 'S, indicating a special subframe, mainly used for downlink transmission. .
  • Table 1 the time domain resources reserved for downlink services account for 40% to 90% under the uplink and downlink ratios.
  • the flexible subframe referred to in the present invention refers to a subframe that can be dynamically or semi-statically configured as an uplink subframe or a downlink subframe in an effective time ratio of each TDD.
  • the system notifies the current seven uplink and downlink subframe ratios by broadcast signaling.
  • the user equipment for example, LTE Rd-11/ 12 user equipments
  • the system can notify different uplink and downlink subframe ratios semi-statically or dynamically, which can be the existing 7 ratios, or can add new downlink sub-frame ratios, for example, when existing
  • the subframes 3, 4, 5, 6, 7, 8 and 9 can be regarded as flexible subframes, when the existing system and the evolved system are in accordance with 0, 1, and 2
  • the flexible subframe configuration in the present invention can be implemented by notifying the uplink and downlink subframe ratio of the user equipment in the evolved system.
  • the method provided in Embodiment 1 of the present invention may include the following steps:
  • Step 101 The base station determines a subframe number of the flexible subframe in the radio frame.
  • the base station determines the subframe number of the flexible subframe, that is, the base station determines which subframes are flexible subframes.
  • LTE TDD One radio frame in the system includes 10 subframes, and which subframes are flexible subframes need to be determined by the base station, or which subframes of the plurality of radio frames are flexible subframes need to be determined by the base station. It should be noted that the base station determines the subframe number of the flexible subframe in two ways:
  • Manner 1 According to the subframe number of the predefined flexible subframe, the base station determines the subframe number of the flexible subframe in the wireless subframe.
  • FIG. 2 is a schematic diagram of a dynamic intra-frame TDD subframe configuration, and subframes 3, 4, 8, and 9 of each radio frame are flexible subframes.
  • the subframes 3, 4, 8 and 9 of each radio frame are flexible subframes on both sides of the base station and the user equipment.
  • the TDD system has 7 kinds of uplink and downlink ratios, and the flexible subframe configuration of each ratio can be different, for each uplink and downlink ratio, it can be pre-defined to be flexible under each uplink and downlink ratio.
  • the subframe number of the subframe is a schematic diagram of a dynamic intra-frame TDD subframe configuration, and subframes 3, 4, 8, and 9 of each radio frame are flexible subframes.
  • Manner 2 The base station configures the subframe number of the flexible subframe.
  • the base station may obtain a subframe number from the primary configuration flexible subframe according to the current channel environment and traffic.
  • the base station does not need to notify the subframe number of the flexible subframe of the user equipment, and if the mode 2 is used, since the subframe number of the flexible subframe can be changed, the base station needs to send another frame.
  • the signaling can be carried by a downlink control channel or higher layer signaling.
  • the base station can employ high layer signaling to improve reliability.
  • High Layer Signaling is relative physical layer signaling, and signaling from a higher layer is transmitted at a slower frequency, including RRC (Radio Resource Control) signaling and media.
  • RRC Radio Resource Control
  • MAC Media Access Control
  • Step 102 The base station determines an attribute of the flexible subframe corresponding to the subframe number, where the attribute indicates that the flexible subframe is an uplink subframe or a downlink subframe.
  • the base station may further configure the attribute of the flexible subframe corresponding to the determined subframe number, that is, whether each flexible subframe is an uplink subframe or a downlink subframe.
  • Step 103 The base station sends the first signaling to the user equipment by using the downlink control channel, where the first signaling includes an attribute of the flexible subframe corresponding to the subframe number.
  • the downlink control channel refers to a channel in the downlink control region, and may include a Physical Downlink Control Channel (PDCCH), and a physical layer 'Hybrid hybrid-ARQ indicator. Channel , PHICH ), or physical control format indicator channel (PCFICH), etc.
  • the downlink control region is the first 1 to 4 Orthogonal Frequency Division Multiplexing (OFDM) symbols of each subframe, which can be indicated by the PCFICH.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the number of bits indicating the flexible subframe attribute in the first signaling is determined according to any one of the following parameters: the number of flexible subframes included in the repetition period, the number of flexible subframes included in the radio frame, or the number of The number of flexible subframes included in the updateable period of a signaling. Since the signaling period may not be updated, the updatable period refers to a period that can be updated of the first signaling. 1 bit can be used to indicate the attributes of a flexible subframe. For example, "0" indicates an uplink subframe, " ⁇ indicates a downlink subframe, or " 1 " indicates an uplink subframe, and "0" indicates a downlink subframe.
  • 2 milliseconds are required to include 2 flexible subframes in a 5 millisecond (ms) repetition period; or 4 bits are required to include 4 flexible subframes in a 10 ms radio frame; or, signaling is updatable.
  • the period is 20ms, since 8 flexible subframes are included, 8 bits are needed.
  • the attributes of multiple flexible subframes may also be indicated by 1 bit.
  • 1 bit indicates the attributes of all flexible subframes in one repetition period, then "0" represents 1 All flexible subframes in the repeating period are uplink subframes, and "1" indicates that all flexible subframes in one repetition period are downlink subframes; or, "is indicating that all flexible subframes in one repetition period are uplink subframes.
  • "0" means that all flexible subframes in one repetition period are downlink subframes.
  • the first signaling may further include a subframe number indication of the flexible subframe.
  • the first signaling can be dynamically notified, periodically notified, or semi-persistent.
  • dynamic notification flexible subframe configuration is more flexible; with periodic notification, reliability and cost savings can be improved; if semi-persistent notification is used, cost and flexibility can be saved.
  • the semi-persistent notification means that when the flexible subframe configuration is updated, the base station configures the first signaling and sends the first signaling to the user equipment. It should be noted that, when determining the number of bits required for the first signaling according to the number of flexible subframes included in the repetition period or in the radio frame, the update period of the signaling is at least a repetition period or a radio frame length.
  • the attribute of the flexible subframe configured by the base station can be sent to the user equipment by using the downlink control channel, which solves the problem that the flexible subframe configuration of the user equipment cannot be signaled in the prior art, and the signaling is reliable.
  • the flexible subframe configuration may include a subframe number configuration of the flexible subframe and an attribute configuration of the flexible subframe.
  • the channel and signal configuration of the flexible subframe may also be included, which will be mainly introduced in the next embodiment.
  • the downlink control channel is a physical layer downlink control channel, and the method provided in Embodiment 2 of the present invention may include the following steps:
  • Step 301 The base station determines a subframe number of the flexible subframe.
  • Step 302 The base station determines an attribute of the flexible subframe corresponding to the subframe number, where the attribute indicates that the flexible subframe is an uplink subframe or a downlink subframe.
  • Step 303 The base station determines a channel and a signal configuration of the flexible subframe.
  • the base station may further determine which channels and signals need to be configured on the flexible subframe.
  • the base station When the flexible subframe is an uplink subframe, the base station needs to determine whether the flexible subframe is configured with a physical uplink control channel (PUCCH, Physical Uplink Control Channel), and a sounding signal (SRS, Sounding Reference Signali); when the flexible subframe is a downlink subframe, the base station needs to determine whether the flexible subframe is configured with PDCCH, PHICH, PCFICH, Common Reference Signal (CRS, Common Reference Signal), and channel state information reference signal (CSI RS) , Channel State Information Reference Signal ) and so on.
  • PUCCH Physical Uplink Control Channel
  • SRS Sounding Reference Signali
  • PDCCH Physical Uplink Control Channel
  • PHICH Physical Uplink Control Channel
  • PCFICH Common Reference Signal
  • CRS Common Reference Signal
  • CSI RS channel state information reference signal
  • the base station After the base station determines the channel and signal configuration of the flexible subframe, it needs to send a signaling to notify the user.
  • the signaling content includes which channels and signals are configured on the flexible subframe, and the resource configuration of the channel signals.
  • the signaling of the channel signal configuration of the flexible subframe can be carried in the following manner:
  • Method 1 Pass the downlink control channel 7;
  • Manner 3 The bearer is combined by the downlink control channel and the upper layer signaling.
  • the first signaling may further include a channel signal configuration of the flexible subframe.
  • Step 304 The base station sends the first signaling to the user equipment by using a downlink control channel, where the first signaling includes an attribute of the flexible subframe, a subframe number of the flexible subframe, and a channel and a signal configuration.
  • the first signaling in step 304 includes both the attributes of the flexible subframe, the subframe number of the flexible subframe, and the channel and signal configuration, but in other examples, the first signaling must be In addition to the attributes of the flexible subframe, the subframe number and the channel signal configuration may be included in the first signaling, or may not be included in the first signaling, and the first signaling may additionally include only the subframe number. Or channel signal configuration. In a practical application, the first signaling in the step 304 may be carried by different channels, and different processing mechanisms are also included for different channel types.
  • Mechanism 1 The PDCCH is used to carry the first signaling.
  • the user equipment Before the user equipment receives or sends the service data, it needs to know the downlink control information (Downlink Control Information, DCI) that the eNB configures for the user equipment.
  • the DCI includes multiple formats.
  • the DCI is carried by the PDCCH.
  • the PDCCH set to be detected by the UE is referred to as a search space.
  • the PDCCH Cyclic Redundancy Check
  • FA False Alarm
  • Manner 1 The base station configures the same downlink control information for at least two user equipments.
  • the base station configures the at least two user equipments with the same Radio Network Temporary Identifier (RNTI).
  • RNTI Radio Network Temporary Identifier
  • the DCI is carried by a PDCCH in a common search space.
  • the base station may send the same downlink control information to the user equipment through the physical layer downlink control channel in the common search space, so that the user equipment obtains the first signaling by using the bit indicated in the downlink control information.
  • the size of the common search space can be expanded, and the specific extension can be pre-defined by standard or configured by high-level signaling.
  • the method of the first method can not only achieve the purpose of signaling the attributes of the flexible subframe of the user equipment, but also saves the cost. For example, five DCIs need to be sent to five user equipments. By sending 1 DCI, 5 user devices can listen to the same DCI, which saves more control channel transmission resources.
  • Manner 2 The base station carries the first signaling on a reserved bit in the downlink control information, and sends the downlink control information to the user equipment through the physical layer downlink control channel.
  • a manner of reserving bits from the existing DCI format for indicating the first signaling is employed.
  • the first signaling is indicated by a DCI in a common search space. For example, at least one of DCI format 3, DCI format 3 A and DCI format 1A is selected.
  • the DCI in the common search space is a system information wireless network temporary identifier (SI-RNTI, When the System Information RNTI), the P-RNTI (Paging RNTI) or the Random Access RNTI (RA-RNTI) scrambled DCI format 1A, in the TDD system, there are 5 in the DCI format 1 A. Redundant bits, or reserved bits, may be used to indicate the first signaling.
  • SI-RNTI system information wireless network temporary identifier
  • P-RNTI Paging RNTI
  • RA-RNTI Random Access RNTI
  • a bit field is reserved from the DCI format 3 for indicating the first signaling.
  • the number of bits reserved is the number of bits required for configuring the first signaling. For example, when the first signaling includes only the attributes of the flexible subframe, and 4 bits are required for indication, 4 bits are reserved.
  • the DCI format 3 includes a plurality of bit fields, each of which includes 2 bits, each bit field being identified by a Transmission Power Control Index (TPC-Index, Transmit Power Control Index).
  • TPC-Index Transmission Power Control Index
  • the bit field reserved for indicating the first signaling in the DCI format 3 can be indicated in the following manner: Mode 1, high-level signaling configuration reserved bit field.
  • the reserved TPC-Index can be configured.
  • the base station reserves TPC-Index 1 and 2 for a group of user equipments, a total of 4 bits, and the high-level signaling configuration has flexibility, which can improve the use efficiency of the bit field; , predefined reserved bit fields. This eliminates the need for additional signaling configuration, but the reserved bit fields are fixed.
  • the DCI bit number of DCI format 3 is an odd number, there will be 1 redundant bit, which can also be used for the first signaling indication.
  • the RNTI scrambled in the CRC field in DCI format 3 is TPC-PUCCH-RNTI or TPC-PUSCH-RNTL when the first signaling is indicated by the reserved bit field in DCI format 3, even if the user equipment does not need to monitor DCI format 3 In the TPC, the base station also needs to configure and notify the RNTL of the CRC field scrambled in the DCI format 3 of the user equipment.
  • the RNTI of the DCI format 3 of the first signaling is the same, that is, the user equipment can acquire the TPC and the first signaling by monitoring one and the same DCI format 3.
  • DCI format 3A the specific configuration is similar to DCI format 3.
  • a bit field is reserved from DCI format 3A for indicating the first signaling. The number of specifically reserved bits is the number of bits required for the first signaling.
  • the DCI format 3A includes a plurality of bit fields, each of which includes 1 bit, and each bit field is identified by a Transmission Power Control Index (TPC-Index, Transmit Power Control Index).
  • TPC-Index Transmission Power Control Index
  • the bit field reserved for the first signaling in the DCI format 3A can be indicated in the following manner: Mode 1, the bit field reserved for the high-level signaling configuration, and the reserved TPC-Index can be configured; Define the reserved bit field.
  • the RNTI scrambled in the CRC field in DCI format 3A is TPC-PUCCH-RNTI or TPC-PUSCH-RNTI.
  • the RNTI of the DCI format 3A configured to acquire the TPC is the same as the RNTI of the DCI format 3A used to obtain the first signaling, that is, the user equipment monitors an identical DCI format. 3A, the TPC and the first signaling can be obtained.
  • the DCI format is the same ( DCI format 3 can also be used.
  • DCI format 3A the RNTI is the same, so that the same user equipment only needs to monitor the same DCI to obtain TPC information and first signaling.
  • the bit field can be reserved in the DCI and used as a virtual CRC, that is, the virtual CRC is set to a specific value, and the user equipment receives the DCI for further verification, whether it is the set value.
  • Manner 3 The base station generates a new DCI format, which is used to indicate the first signaling.
  • the base station sends the generated new downlink control information to the user equipment through the physical layer downlink control channel.
  • Mode 1 The DCI format includes only the first signaling and CRC information.
  • virtual CRC information may also be included.
  • the DCI includes 4-bit or 9-bit first signaling
  • the 4-bit first signaling includes only the flexible subframe's attribute configuration
  • the 9-bit first signaling includes flexible subframe attribute configuration and signal channel configuration. 6-bit virtual CRC information and 16-bit CRC information, thus requiring a total of 26 bits.
  • the number of information bits of the DCI format 1C is the smallest.
  • the number of information bits of the DCI format indicating the configuration of the dynamic TDD subframe can be the same as that of the DCI format 1C. If the number of bits of the DCI format 1C is less than, for example, the DCI format 1C corresponding to 20 MHz is 31 bits, and the DCI format indicating the dynamic TDD subframe configuration is 26 bits, then redundant information bits (ie, reserved bits) are added. Or lengthen the virtual CRC bit so that both formats are 31 bits. In order to improve performance, it is also possible to set the DCI format to use only CCE aggregation levels of 4 and 8.
  • the DCI format may also indicate other information, such as PDCCH blind detection information (for reducing the number of blind detections of the user equipment), and precoding information of the PDCCH.
  • the first method in the first method can be used in combination with the second mode or the third mode.
  • the TPC information and the first signaling that are required to be acquired by the at least two user equipments are all carried in the same PDCCH.
  • Step 304 may further carry the first signaling by using another processing mechanism:
  • the downlink control channel is a physical layer hybrid automatic repeat request indication channel, and the PHICH is used to carry the first signaling.
  • the PHICH resource is identified by n PHicH and n PHicH, where n PHICH indicates the PHICH group number, seq
  • nPHicH indicates the orthogonal sequence number within a PHICH group.
  • the base station informs the user equipment physical layer by means of a pre-defined physical layer hybrid automatic retransmission request indicating channel resource, or using a third signaling notification message.
  • the hybrid automatic repeat request indicates channel resources.
  • the PH signaling resource may be reserved to carry the first signaling.
  • the reserved PHICH resource can no longer be used as the HARQ indicator (HI, HARQ indicator).
  • the reservation method can be as follows:
  • n group seq mode 1 Pre-defined reserved PHICH resources.
  • the reserved PHICH resources can be defined by n PHicH and n PHicH.
  • the subframe number of the reserved PHICH resource needs to be defined. For example, subframes 0, 1, 5, and 6 defining each radio frame reserve PHICH resources for carrying the first signaling.
  • the PHICH resource is divided into two parts, and the introduction of the 1 PHICH identifier can indicate which part is specifically. Therefore, it is also necessary to define which part of the PHICH resource the reserved PHICH resource belongs to, and specifically define the reserved ⁇ HICH.
  • Manner 2 The base station signaling notifies the PHICH resource reserved by the user equipment.
  • the upper layer is adopted
  • the notification reservation ⁇ ⁇ ⁇ and n PHICH.
  • the subframe number of the reserved PHICH resource needs to be notified, for example, the subframes 0, 1, 5, and 6 of each radio frame are reserved to reserve PHICH resources for bearer dynamics.
  • TDD subframe configuration signaling For a downlink sub-frame corresponding to two PHICH uplink subframe, also you need to notify the reserved PHICH. 1, wherein, in the second approach the user equipment notifies the base station of the third signaling is the signaling message.
  • the method for mapping the first signaling to the reserved PHICH resource is: encoding the first signaling according to the PHICH resource reserved in one or more subframes.
  • the original bit of the first signaling is 2 bits
  • 6 PHICH resources are reserved in one subframe.
  • the signaling configuration of the TDD subframe can be encoded into 6 bits, and then carried by 6 PHICH resources respectively.
  • the encoding may be a repetitive encoding of the cartridge or other encoding method.
  • step 304 may also adopt mechanism 3:
  • the first signaling is carried by using the PCFICH.
  • mechanism 3 may use the reserved state 4 of the PCFICH to indicate the first signaling.
  • step 304 may also employ mechanism four:
  • the redundant signaling is used to carry the first signaling.
  • redundant resource element groups (REG, Resource-dement group) appear in the downlink control area.
  • the redundant REG can be used to carry the first signaling, and the first signaling is encoded according to the redundant REG resource size.
  • the subframe number of the flexible subframe and its attributes and the channel signal configuration on the flexible subframe may also be configured in a broadcast manner.
  • the broadcast message has two forms: a main information block (MIB) and a system information block (SIB).
  • MIB main information block
  • SIB system information block
  • MIB ⁇ f the user can be notified with redundant bits in the MIB.
  • SIB bearer you need to add a new IE.
  • the embodiment of the present invention further provides a structure diagram of a base station applied to a time division duplex system, where the base station may specifically include: a processing unit 401, a subframe number used to determine a flexible subframe in a radio frame;
  • the processing unit 2 is configured to determine an attribute of the flexible subframe corresponding to the subframe number that is determined by the processing unit, where the attribute indicates that the flexible subframe is an uplink subframe or a downlink subframe.
  • the sending unit 403 is configured to send the first signaling to the user equipment by using a downlink control channel, where the first signaling includes an attribute of the flexible subframe corresponding to the subframe number determined by the processing unit 2.
  • the base station may further include:
  • the processing unit three 501 is configured to determine a channel and a signal configuration of the flexible subframe corresponding to the subframe number determined by the processing unit 2;
  • the sending unit 403 is further configured to notify, by using the first signaling or the high layer signaling, the channel and signal configuration determined by the processing unit of the user equipment.
  • the channel and the signal configuration may be sent to the user equipment through the downlink control channel, or may be sent to the user equipment through the high layer signaling. It should be noted that, when the channel and the signal configuration are sent to the user equipment through the downlink control channel, as a specific embodiment in the actual application, the channel and signal configuration of the flexible subframe may also be sent by the sending unit 403 through the first letter. Let the channel and signal configuration be sent to the user terminal.
  • the base station may further include:
  • the sending unit is further configured to notify the subframe number of the flexible subframe of the user equipment by using the first signaling or the high layer signaling.
  • the subframe number of the flexible subframe may be notified to the user equipment by using a downlink control channel, or may be notified to the user equipment by using high layer signaling.
  • the sending unit may send the channel and signal configuration to the user equipment by using the first signaling.
  • the sending unit 403 is different according to the downlink control channel.
  • the sending unit 403 may specifically include:
  • the configuration subunit 601 is configured to configure the same downlink control information for the at least two user equipments; the bit of the downlink control information includes a bit indicating the first signaling;
  • the first sending sub-unit 602 is configured to send the same downlink control information to the user equipment by using a physical layer downlink control channel in the common search space, so that the user equipment obtains the first bit by using the bit indicated in the downlink control information. Signaling.
  • the sending unit 403 may specifically include:
  • the first bearer subunit 701 is configured to carry the first signaling on a reserved bit in the downlink control information, where the downlink control information is at least one of a DCI format 3, a DCI format 3A, and a DCI format 1A.
  • the first sending sub-unit 702 is configured to send the downlink control information to the user equipment by using the physical layer downlink control channel.
  • the sending unit 403 may specifically include:
  • a second bearer subunit 801 configured to carry the first signaling on a reserved resource of the physical layer hybrid automatic repeat request indication channel
  • the second sending sub-unit 802 is configured to send the first signaling to the user equipment on the physical layer hybrid automatic repeat request indication channel resource.
  • the base station may further include: a data processing unit, configured to receive, according to the first signaling, service data of a current radio frame sent by the user equipment; or send the current radio frame to the user equipment according to the first signaling.
  • a data processing unit configured to receive, according to the first signaling, service data of a current radio frame sent by the user equipment; or send the current radio frame to the user equipment according to the first signaling.
  • Business data Referring to FIG. 9, a flowchart of an embodiment of a method for configuring a subframe in a time division duplex system is shown. The method may be applied to a terminal in a time division duplex system. The embodiment may specifically include: Step 901: The user equipment acquires the subframe number of the flexible subframe.
  • the user equipment When the user equipment acquires the subframe number of the flexible subframe, the user equipment can confirm by receiving the signaling notification of the base station.
  • Step 902 The user equipment receives the first signaling sent by the base station by using the downlink control channel, where the signaling includes an attribute of the flexible subframe corresponding to the subframe number, where the attribute indicates that the flexible subframe is an uplink. Subframe or downlink subframe.
  • Step 903 Acquire an attribute of the flexible subframe corresponding to the subframe number according to the received first signaling.
  • the user equipment may also receive the channel and signal configuration of the flexible subframe sent by the base station through the downlink control channel and/or the high layer signaling.
  • the first signaling may further include a channel and a signal configuration of the flexible subframe.
  • the subframe number of the flexible subframe notified by the base station through the downlink control channel or the high layer signaling may also be received.
  • the first signaling may further include a subframe number of the flexible subframe.
  • the method flow on the user equipment side is related to the method flow on the base station side, only the base station side is the transmitting end of the first signaling, and the user equipment is the receiving end of the first signaling, so the first letter is related.
  • the different mechanisms of the user equipment passing the downlink control channel refer to the method description of the foregoing base station side.
  • the downlink control channel can receive the attributes of the flexible subframe configured by the base station, and the problem that the flexible subframe configuration of the user equipment cannot be signaled in the prior art is solved, and the reliability of the signaling is high, and the user can be made.
  • the device correctly obtains the flexible subframe configuration.
  • the flexible subframe configuration may include a subframe number configuration of the flexible subframe and an attribute configuration of the flexible subframe. Further, the channel and signal configuration of the flexible subframe may also be included.
  • the user equipment may include:
  • a processing unit 4001 configured to determine a subframe number of the flexible subframe
  • the receiving unit 1002 is configured to: after the base station determines the attribute of the flexible subframe in the current radio frame, receive the first signaling sent by the base station by using the downlink control channel, where the first signaling includes the subframe number corresponding to The attribute of the flexible subframe, where the attribute indicates that the flexible subframe is an uplink subframe or a downlink subframe.
  • the obtaining unit 1003 is configured to acquire, according to the received first signaling, an attribute of the flexible subframe corresponding to the subframe number.
  • the receiving unit may be further configured to receive a channel and a signal configuration of a flexible subframe that is sent by the base station by using the first signaling and/or the high layer signaling.
  • the first signaling may further include a channel and a signal configuration of the flexible subframe.
  • the receiving unit may be further configured to receive a subframe number of the flexible subframe that is notified by the base station by using the first signaling or the high layer signaling.
  • the first signaling may further include a subframe number unit of the flexible subframe.
  • An embodiment of the present invention provides an embodiment of a method for configuring another seed frame in a time division duplex system, where the method is used by the base station to send a second signaling to an evolved version of the user equipment, where the second signaling indicates an uplink and downlink subframe. Matching.
  • the uplink-downlink subframe ratio indicated by the second signaling may be different from the uplink-downlink subframe ratio of the non-evolved version (for example, LTE Rd-8/9/10) user equipment.
  • the uplink-downlink subframe ratio of the non-evolved version user equipment is currently reported as the subframe ratio 2, and the uplink and downlink subframe ratio of the evolved version user equipment is notified to be the subframe ratio 1.
  • the compatibility of the existing version can be ensured, and the uplink and downlink subframe ratios of the evolved version can be flexibly changed according to the uplink and downlink service requirements.
  • the system broadcasts the current seven uplink and downlink subframe ratios through broadcast signaling.
  • the base station may semi-statically or dynamically notify the current uplink-downlink subframe ratio through high-layer signaling or a downlink control channel (which may be existing 7 types)
  • the uplink and downlink subframe ratios can also be added with the downlink subframe ratio.
  • the frequency of notifications can It is cyclical or semi-continuous.
  • RRC signaling or MAC signaling may be used, so that the current uplink-downlink subframe ratio of the user equipment may be separately configured, for example, the partial evolved user equipment and the existing version user may be notified.
  • the device can be configured with different uplink and downlink subframe ratios.
  • different uplink and downlink subframe ratios can be configured for different evolved user equipments.
  • the method provided in step 304 of the second embodiment may be used (the difference is that the first signaling is carried in the second embodiment, and the second signaling is carried in the embodiment), by using the PDCCH, or the PHICH, or The PCFICH, or redundant REG, carries the second signaling.
  • the base station can configure the validity of the second signaling, and the minimum unit of the effective time can be the radio frame level (one radio frame 10 ms).
  • the base station configures the current second signaling to be valid in 100 radio frames. Or 50 radio frames are valid; the minimum unit can also be a millisecond (ms) level.
  • the base station configures the current second signaling to be valid within 100ms or within 1000ms.
  • the specific configuration notification method of the effective time of the second signaling may include the following methods:
  • the effective time of the second signaling is notified by the high layer signaling.
  • RRC signaling or MAC signaling may be employed.
  • the notification of the valid time may be sent together with the second signaling.
  • the effective time of the second signaling is notified through the physical downlink control channel.
  • the notification of the valid time may be sent together with the second signaling.
  • Method three pre-defined.
  • the standard can pre-define the effective time of the second signaling, for example 100 radio frames.
  • the uplink and downlink subframe ratios of the user equipment of the evolved version are separately indicated by the high layer signaling or the downlink control channel, which solves the problem that the flexible subframe configuration of the user equipment cannot be signaled in the prior art.
  • the reliability of the signaling is high, which enables the user equipment to correctly obtain the flexible subframe configuration.
  • the embodiment of the present invention further provides a base station applied to a time division duplex system.
  • the base station may specifically include:
  • the second signaling unit 1201 is configured to send the second signaling to the evolved version of the user equipment, where the second signaling indicates the uplink and downlink subframe ratio.
  • the base station side further includes:
  • the notification unit 1301 is configured to notify the evolved version of the user equipment of the effective time of the second signaling.
  • the embodiment of the present invention provides an embodiment of a method for configuring another seed frame in a time division duplex system, which is used on the user equipment side. Referring to FIG. 14 , the embodiment of the present invention is implemented. The method provided can include the following steps:
  • Step 1401 The evolved version of the user equipment receives the second signaling sent by the base station, where the second signaling indicates the uplink and downlink subframe ratio.
  • the uplink and downlink subframe ratio indicated by the second signaling may be different from the notification non-evolved version.
  • the uplink and downlink subframe ratio of the user equipment (For example, LTE Rd-8/9/lO)
  • the evolved version of the user equipment can learn the uplink and downlink subframe ratios semi-statically or dynamically by receiving high layer signaling or downlink control channels.
  • the specific acquisition method of the effective time of the second signaling may include the following methods:
  • the high-level signaling is received to obtain the effective time of the second signaling.
  • Method 2 Receive a physical downlink control channel to obtain a valid time of the second signaling.
  • the embodiment of the present invention further provides a user equipment applied to a time division duplex system.
  • the user equipment may specifically include: receiving a second signaling unit. 1501. The second signaling sent by the base station is received, where the second signaling indicates an uplink and downlink subframe ratio. This unit is only configured on the evolved version of the user device.
  • the user equipment When the user equipment also needs to receive the high-level signaling or the physical downlink control channel to obtain the effective time of the second signaling, referring to FIG. 16, the user equipment further includes:
  • the obtaining unit 1601 is configured to receive the high layer signaling or the physical downlink control channel to obtain the second signaling Effective time. This unit is only configured on the evolved version of the user device.
  • the program may be stored in a computer readable storage medium, and the storage medium may include: ROM, RAM, disk or CD, etc.

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Description

时分双工系统中子帧配置的方法、 基^及用户设备
本申请要求于 2011 年 03 月 31 日提交中国专利局、 申请号为 201110081085.7、 发明名称为"时分双工系统中子帧配置的方法、 基站及用户 设备"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
本发明涉及通信技术领域, 尤其涉及时分双工系统中子帧配置的方法、基 站及用户设备。 背景技术
长期演进( LTE, Long Term Evolution )系统支持时分双工( Time Division Duplexing, TDD )方式,即上行链路(UL, Uplink )和下行链路( DL, Downlink ) 使用同一频率的不同时隙。 LTE TDD系统可以根据业务类型,半静态配置上下 行配比( Uplink-Downlink Configuration ), 以满足不同的上下行非对称业务需 求。 LTE TDD系统中, 使用的上下行配比是半静态配置的, 不能动态改变, 这 样会导致当前的上下行配比与瞬时上下行业务量不匹配,从而不能有效利用资 源, 尤其对于用户数较少的小区尤为严重。
为解决上述问题, 引入动态 TDD子帧配比概念, 即在无线帧中配置一些 灵活子帧 ( flexible subframe ), 其中每个灵活子帧可以被动态地配置成上行子 帧或下行子帧。
但是在现有技术中,在动态 TDD子帧配置的场景下,用户设备无法获取 灵活子帧的属性, 进而后续无法根据该属性与基站侧进行数据交互。 发明内容
本发明实施例提供时分双工系统中子帧配置的方法、基站及用户设备, 以 能解决现有技术中用户设备无法获知一个灵活子帧是上行子帧还是下行子帧 的问题。
为解决上述技术问题,本发明实施例提供了一种时分双工系统中子帧配置 的方法, 该方法包括:
基站确定无线帧中灵活子帧的子帧号;
所述基站确定所述子帧号对应的灵活子帧的属性,所述属性表示所述子帧 号对应的灵活子帧为上行子帧或下行子帧;
所述基站通过下行控制信道向用户设备发送第一信令,所述第一信令包括 所述子帧号对应的灵活子帧的属性。
本发明实施例提供了一种基站, 该基站包括:
单元处理单元一, 用于确定无线帧中灵活子帧的子帧号;
处理单元二单元,用于确定所述处理单元一确定的所述子帧号对应的灵活 子帧的属性; 所述属性表示灵活子帧为上行子帧或下行子帧;
发送单元, 用于通过下行控制信道向所述用户设备发送第一信令, 所述第 一信令包括所述处理单元二确定的所述子帧号对应的灵活子帧的属性。
本发明实施例提供了一种时分双工系统中子帧配置的方法, 该方法包括: 用户设备获取灵活子帧的子帧号;
接收基站通过下行控制信道发送的第一信令,所述第一信令包括所述子帧 号对应的灵活子帧的属性, 所述属性表示灵活子帧为上行子帧或下行子帧; 根据接收的所述第一信令, 获取所述子帧号对应的灵活子帧的属性。 本发明实施例提供了一种用户设备, 该用户设备包括:
处理单元四, 用于确定灵活子帧的子帧号;
接收单元, 用于接收基站通过下行控制信道发送的第一信令, 所述第一信 子帧为上行子帧或下行子帧;
获取单元, 用于根据所述接收单元接收的所述第一信令, 获取所述子帧号 对应的灵活子帧的属性。 。
本发明实施例具有以下优点:
在本发明实施例中, 基站可以信令通知用户设备灵活子帧的属性配置情 况, 并且采用下行控制信道的方式通知用户设备,使得用户设备可以获知灵活 子帧的属性, 进而根据其属性在灵活子帧上与基站正常通信。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施 例或现有技术描述中所需要使用的附图作筒单地介绍,显而易见地, 下面描述 中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付 出创造性劳动性的前提下, 还可以根据这些附图获得其他的附图。
图 1是本发明的时分双工系统中子帧配置的方法实施例一的流程图; 图 2是本发明中一个无线帧内动态 TDD子帧配置的示意图;
图 3是本发明的时分双工系统中子帧配置的方法实施例二的流程图; 图 4是本发明的时分双工系统中基站实施例一的结构示意图;
图 5是本发明的基站实施例中发送单元的结构示意图;
图 6是本发明的基站实施例中发送单元的结构示意图;
图 7是本发明的基站实施例中发送单元的结构示意图;
图 8是本发明的时分双工系统中基站实施例二的结构示意图;
图 9是本发明的时分双工系统中子帧配置的方法实施例三的流程图; 图 10是本发明的时分双工系统中用户设备实施例一的结构示意图; 图 11是本发明的时分双工系统中子帧配置的方法实施例四的流程图; 图 12是本发明的时分双工系统中基站实施例三的结构示意图; 图 13是本发明的时分双工系统中基站实施例四的结构示意图; 图 14是本发明的时分双工系统中子帧配置的方法实施例五的流程图; 图 15是本发明的时分双工系统中用户设备实施例二的结构示意图; 图 16是本发明的时分双工系统中用户设备实施例三的结构示意图。 具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清 楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是 全部的实施例。基于本发明中的实施例, 本领域普通技术人员在没有作出创造 性劳动前提下所获得的所有其他实施例, 都属于本发明保护的范围。
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清 楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而不是 全部的实施例。基于本发明中的实施例, 本领域普通技术人员在没有做出创造 性劳动前提下所获得的所有其他实施例, 都属于本发明保护的范围。
为使本发明实施例的上述目的、特征和优点能够更加明显易懂, 下面结合 附图和具体实施方式对本发明实施例作进一步详细的说明。
在 LTE TDD系统中总共包括 7种上下行配比,如表 1所示, 其中 'D,表示 下行子帧, 'U,表示上行子帧, 'S,表示特殊子帧, 主要用于下行传输。 从表 1 可看出, 在各上下行配比下, 预留给下行业务的时域资源占 40 %到 90 %。
表 1
配置号 重复周期 子帧号
0 1 2 3 4 5 6 7 8 9
0 5 ms D S u u U D S U U U
1 5 ms D s u u D D S U U D
2 5 ms D s u D D D S u D D
3 10 ms D s u U U D D D D D
4 10 ms D s u U D D D D D D
5 10 ms D s u D D D D D D D
6 5 ms D s u U U D S U U D
本发明中所说的灵活子帧指的是在每种 TDD上下比配比的有效时间内, 可以被动态地或半静态地配置成上行子帧或下行子帧的子帧。对于现有版本用 户设备, 例如 LTE Rel-8/9/lO用户设备, 系统通过广播信令通知当前的 7种上 下行子帧配比, 对于演进系统, 的用户设备, 例如 LTE Rd-11/12等的用户设 备, 系统可以半静态地或动态地通知不同的上下行子帧配比, 可以为现有的 7 种配比, 也可以新增加上下行子帧配比, 例如, 当现有系统和演进系统都按照 7种配置通知时, 子帧 3, 4, 5, 6, 7, 8和 9可以看作是灵活子帧, 当现有 系统和演进系统都按照 0, 1和 2三种上下行子帧配置时, 子帧 3, 4, 8和 9 可以看作是灵活子帧。 因此, 本发明中的灵活子帧配置可以通过通知演进系统 中的用户设备的上下行子帧配比实现。 参考图 1 , 在本发明实施例一中, 实现本发明实施例一所提供的方法可以 包括以下步骤:
步骤 101: 基站确定无线帧中灵活子帧的子帧号。
基站确定灵活子帧的子帧号, 即基站确定哪些子帧是灵活子帧。 LTE TDD 系统中一个无线帧包括 10个子帧, 其中哪些子帧是灵活子帧需要由基站进行 确定, 或者多个无线帧中的哪些子帧是灵活子帧需要由基站进行确定。 需要说 明的是, 基站确定灵活子帧的子帧号有两种方式:
方式一: 根据预先定义的灵活子帧的子帧号,基站确定无线子帧中灵活子 帧的子帧号。
参考图 2, 图 2为一个无线帧内动态 TDD子帧配置的示意图, 每个无线 帧的 3、 4、 8和 9号子帧为灵活子帧。 此时就需要在基站和用户设备两侧都预 先定义每个无线帧的 3 , 4, 8和 9号子帧为灵活子帧。 同时, 因为 TDD系统 有 7种上下行配比, 而每种配比下的灵活子帧配置可以不同, 所以针对每一种 上下行配比, 都可以预先定义每一种上下行配比下灵活子帧的子帧号。
方式二: 基站配置灵活子帧的子帧号。
具体的,基站可以根据当前信道环境和业务量等来自主配置灵活子帧的子 帧号。
需要说明的是,如果采用方式一,基站就无需再通知用户设备灵活子帧的 子帧号, 而采用方式二的话, 因为灵活子帧的子帧号是可以改变的, 因此基站 还需要另外发送信令通知用户设备。该信令可以通过下行控制信道或高层信令 承载。优选地,基站可以采用高层信令, 以提高可靠性。其中, 高层信令(High Layer Signaling )是相对物理层信令来说的, 来自更高层面 (layer )发送频率 更慢的信令, 包括无线资源控制 (RRC, Radio Resource Control )信令和媒体 接入控制 (MAC, Media Access Control )信令和广播信令等。
步骤 102: 基站确定所述子帧号对应的灵活子帧的属性; 所述属性表 示灵活子帧为上行子帧或下行子帧。
基站在确定灵活子帧的子帧号之后, 进一步可以配置已经确定的子帧 号对应的灵活子帧的属性, 即是配置每一个灵活子帧是上行子帧还是下行 子帧。 步骤 103 : 基站通过下行控制信道向用户设备发送第一信令, 所述第 一信令包括所述子帧号对应的灵活子帧的属性。
在本步骤中, 下行控制信道指的是下行控制区域内的信道, 可以包括 物理层下行控制信道( Physical Downlink Control channel , PDCCH ), 物理 层'混合自动重传请求指示信道 ( Physical hybrid-ARQ indicator channel , PHICH ), 或者, 物理层控制格式指示信道 ( Physical control format indicator channel, PCFICH ) 等。 下行控制区域为每个子帧的前 1 ~ 4个正交频分复 用技术 ( Orthogonal Frequency Division Multiplexing , OFDM )符号, 可以 通过 PCFICH指示。
在本步骤中, 所述第一信令中指示灵活子帧属性的比特数依据下列任 一参数确定: 重复周期内包括的灵活子帧个数、 无线帧内包括的灵活子帧 个数或者第一信令的可更新周期内包括的灵活子帧个数, 因为信令周期有 些不可以更新, 所以所述可更新周期指的是第一信令的可以更新的周期。 1 个比特可以用于指示 1个灵活子帧的属性, 例如 "0" 表示上行子帧, " Γ 表示下行子帧, 或者, " 1 " 表示上行子帧, "0" 表示下行子帧。 参考图 2 所示, 5毫秒(ms ) 重复周期内包括 2个灵活子帧, 则需要 2比特; 或者, 10ms无线帧内包括 4个灵活子帧, 则需要 4比特; 或者, 信令可更新的周 期为 20ms , 因为包括 8个灵活子帧, 则需要 8比特。
需要说明的是, 为了节省网络开销, 也可以 1 个比特指示多个灵活子 帧的属性, 例如, 1 个比特指示 1 个重复周期内所有灵活子帧的属性, 那 么, "0" 表示 1个重复周期内所有灵活子帧都为上行子帧, 则 " 1" 表示 1 个重复周期内所有灵活子帧都为下行子帧; 或者, " 表示 1 个重复周期 内所有灵活子帧都为上行子帧, 则 "0" 表示 1个重复周期内所有灵活子帧 都为下行子帧。
另外, 可选的是, 当灵活子帧的子帧号也是通过下行控制信道指示时, 所述第一信令还可以包括灵活子帧的子帧号指示。
第一信令可以动态通知, 也可以周期通知, 还可以半持续 ( Semi-Persistent )通知。 采用动态通知的方式, 则灵活子帧的配置更具灵 活性; 而采用周期通知, 则可以提高可靠性且节省开销; 如果采用半持续 通知, 则可以节省开销且具有灵活性。 其中, 半持续通知指得是灵活子帧 配置有更新时, 基站才配置第一信令并发送给用户设备。 需要说明的是, 当根据重复周期内或无线帧内包括的灵活子帧数确定第一信令需要的比特 数时, 信令的更新周期至少为重复周期或无线帧长。
在本实施例中, 通过下行控制信道可以将基站配置好的灵活子帧的属 性发送给用户设备, 解决了现有技术中无法信令通知用户设备灵活子帧配 置的问题, 同时信令的可靠性较高, 可以使得用户设备正确获取灵活子帧 配置。 其中, 灵活子帧配置可以包括灵活子帧的子帧号配置以及灵活子帧 的属性配置。 进一步的, 还可以包括灵活子帧的信道和信号配置, 将在下 一个实施例中重点介绍。 参考图 3 , 在本发明实施例二中, 所述下行控制信道为物理层下行控 制信道, 实现本发明实施例二所提供的方法可以包括以下步骤:
步骤 301 : 基站确定灵活子帧的子帧号。
步骤 302: 基站确定所述子帧号对应的灵活子帧的属性; 所述属性表 示灵活子帧为上行子帧或下行子帧。
步骤 303 : 基站确定灵活子帧的信道和信号配置。
基站在确定灵活子帧的属性后, 进一步可以确定灵活子帧上需要配置 哪些信道和信号。
当灵活子帧为上行子帧时, 基站需要确定该灵活子帧是否配置物理上 行控制信道(PUCCH, Physical Uplink Control Channel ), 探测信号 (SRS , Sounding Reference Signali ) 等; 当灵活子帧为下行子帧时, 基站需要确定 该灵活子帧是否配置 PDCCH , PHICH , PCFICH, 公共参考信号 ( CRS , Common Reference Signal ), 信道状态信息参考信号 ( CSI RS , Channel State Information Reference Signal ) 等。
当基站确定灵活子帧的信道和信号配置后, 需要发送信令通知用户。 信令内容包括灵活子帧上配置了哪些信道和信号,以及信道信号的资源配置。 灵活子帧的信道信号配置的信令可以通过以下方式承载:
方式一: 通过下行控制信道 7 载;
方式二: 通过高层信令承载;
方式三: 通过下行控制信道和高层信令结合承载。
对于方式三,在实际应用中例如, 灵活子帧上配置了哪些信道和信号通过 下行控制信道承载, 信道信号的资源配置通过高层信令承载。
可选的是, 当灵活子帧的信道信号配置也是通过下行控制信道指示时, 所 述第一信令还可以包括灵活子帧的信道信号配置。
步骤 304: 基站通过下行控制信道向用户设备发送第一信令, 所述第一信 令包括灵活子帧的属性、 灵活子帧的子帧号和信道和信号配置。
作为实际应用中的一个例子,步骤 304中的第一信令同时包括了灵活子帧 的属性、 灵活子帧的子帧号和信道和信号配置, 但是在其他例子中, 第一信令 除了必须包括灵活子帧的属性之外,子帧号和信道信号配置可以都包括在第一 信令中,也可以都不包括在第一信令中, 第一信令还可以另外只包括子帧号或 者信道信号配置。在实际应用中, 所述步骤 304中的第一信令具体可以通过不 同的信道承载, 针对不同的信道类型也包括不同的处理机制。
机制一: 采用 PDCCH承载第一信令。
用户设备接收或发送业务数据之前, 需要获知 eNB配置给该用户设备的 下行控制信息(Downlink Control Information, DCI ) 。 DCI包括多种格式。 DCI通过 PDCCH承载。 UE待检测的 PDCCH集合称为搜索空间。
PDCCH的循环冗余校验 ( CRC, Cyclic Redundancy Check )虚警(FA, False Alarm )会导致用户设备错误解读当前的灵活子帧属性。 在现有的所有 DCI格式中, 下行控制信息( Downlink Control Information, DCI )比特数( DCI 负载, DCI payload size )都较大, 然而, 指示动态 TDD中灵活子帧的属性的 DCI仅需要很少的比特, 所以资源浪费比较大。 因此, 本发明实施例为了设计 一种具备可靠性而且节约开销的 DCI, 给出以下方式:
方式一: 基站给至少两个用户设备配置相同的下行控制信息。
基站给该至少两个用户设备配置相同的无线网络临时标识(RNTI, Radio Network Temporary Identifier ) 。 优选地, 所述 DCI承载于公共搜索空间中的 PDCCH。 基站可以通过公共搜索空间中的物理层下行控制信道向用户设备发 送所述相同的下行控制信息,以便于用户设备通过所述下行控制信息中指示的 比特位获得第一信令。 进一步地, 由于现有的公共搜索空间容量有限, 可以对 公共搜索空间的大小进行扩展,具体扩展多少可以标准预定义或通过高层信令 配置。
采用方式一, 不仅可以实现信令通知用户设备灵活子帧的属性的目的, 可 以大大节省开销, 例如, 原本需要给 5个用户设备发送 5份 DCI, 但采用本实 施例的方法后, 仅需要发送 1份 DCI, 5个用户设备都可以监听相同的 DCI, 这样就节省出了更多的控制信道传输资源。
方式二: 基站将所述第一信令承载在下行控制信息中预留的比特位上, 并 将所述下行控制信息通过物理层下行控制信道发送给用户设备。
在方式二中, 采用从现有 DCI格式中预留比特用于指示第一信令的方式。 优选地, 利用公共搜索空间中的 DCI指示第一信令。 例如选取 DCI格式 3, DCI格式 3 A和 DCI格式 1A中的至少一种。
所述公共搜索空间中的 DCI 为系统信息无线网络临时标识 ( SI-RNTI, System Information RNTI ) , P-RNTI ( Paging RNTI )或随机接入无线网络临 时标识( RA-RNTI, Random Access RNTI )加扰的 DCI format 1A时, 在 TDD 系统中,该 DCI format 1 A中有 5个冗余比特或者说是预留比特( reserved bits ), 可以用于指示第一信令。
所述公共搜索空间中的 DCI为 DCI format 3时, 从 DCI格式 3中预留比 特域, 用于指示第一信令。 具体预留的比特数为配置第一信令需要的比特数, 例如第一信令仅包括灵活子帧的属性时, 且需要 4 比特进行指示, 则预留 4 比特。 DCI格式 3包括多个比特域, 每个比特域包括 2比特, 每个比特域由传 输功率控制索引 (TPC-Index, Transmit Power Control Index )标识。
DCI格式 3中预留用于指示第一信令的比特域, 可以通过以下方式指示: 方式①、 高层信令配置预留的比特域。具体可以配置预留的 TPC-Index, 例如, 基站给一组用户设备预留 TPC-Index 1和 2, 共 4个比特, 高层信令配置具有 灵活性, 可以提高比特域的使用效率; 方式②、 预定义预留的比特域。 这样勿 需额外的信令配置, 但是预留的比特域固定。 另外, 当 DCI格式 3的 DCI比 特数为奇数时, 会有 1个冗余比特, 该冗余比特也可用于第一信令指示。
在 DCI 格式 3 中 CRC 域加扰的 RNTI 为 TPC-PUCCH-RNTI 或者 TPC-PUSCH-RNTL 当第一信令通过 DCI格式 3中的预留比特域指示时, 即 使用户设备不需要监测 DCI format 3中的 TPC,基站也需要配置并通知用户设 备 DCI格式 3中 CRC域加扰的 RNTL 当用户设备需要监测 DCI format 3中 的 TPC时, 配置用于获取 TPC的 DCI format 3的 RNTI和用于获取第一信令 的 DCI format 3的 RNTI相同, 即用户设备通过监测一个相同的 DCI format 3 , 即可获取 TPC和第一信令。 这样可以降低平均 PDCCH盲检测次数, 因为当 用于获取 TPC的 DCI format 3的 RNTI和用于获取动态 TDD子帧配置的 DCI format 3的 RNTI不同时,用户设备需要监测 2个不同 RNTI加 4尤的 DCI format 3, 增加平均 PDCCH盲检测次数。 在所述公共搜索空间中的 DCI为 DCI format 3A时, 具体配置方式类似 DCI格式 3。 从 DCI格式 3A中预留比特域, 用于指示第一信令。 具体预留的 比特数为第一信令需要的比特数。 DCI格式 3A包括多个比特域, 每个比特域 包括 1 比特, 每个比特域由传输功率控制索引 (TPC-Index, Transmit Power Control Index )标识。
DCI格式 3A中预留用于指示第一信令的比特域,可以通过以下方式指示: 方式①、 高层信令配置预留的比特域, 具体可以配置预留的 TPC-Index; 方式 ②、 预定义预留的比特域。 DCI 格式 3A 中 CRC 域加扰的 RNTI 为 TPC-PUCCH-RNTI或者 TPC-PUSCH-RNTI。 当第一信令通过 DCI格式 3 A中 的预留比特域指示时, 即使用户设备不需要监测 DCI format 3A中的 TPC, 基 站也需要配置并通知用户设备 DCI格式 3A中 CRC域加扰的 RNTL当用户设 备需要监测 DCI format 3A中的 TPC时, 配置用于获取 TPC的 DCI format 3A 的 RNTI和用于获取第一信令的 DCI format 3A的 RNTI相同, 即用户设备通 过监测一个相同的 DCI format 3A, 即可获取 TPC和第一信令。
需要说明的是, 为了降低平均 PDCCH盲检测次数, 对于同一个用户设备 需要获取的 TPC信息和第一信令都通过同一个 PDCCH承载, 即采用的 DCI 格式相同(可以采用 DCI format 3,也可以采用 DCI format 3A ) ,采用的 RNTI 相同, 这样, 同一个用户设备只需监测同一个 DCI即可获取 TPC信息和第一 信令。
为了提高可靠性, 降低 CRC虚警概率, 可以在 DCI中预留比特域, 当作 虚拟 CRC使用, 即把虚拟 CRC设置成特定值, 用户设备接收到 DCI做进一 步校验, 是否为所设值。
方式三: 基站生成新的 DCI格式, 用于指示第一信令。 基站将生成的新 的下行控制信息通过物理层下行控制信道发送给用户设备。
因为第一信令只需要艮少比特, 为了降低开销, 有以下两种方式: 方式①: 该 DCI格式只包括第一信令和 CRC信息。 为了提高可靠性, 降 低 CRC虚警概率, 还可以包括虚拟 CRC信息。 例如, 该 DCI包括 4比特或 9 比特的第一信令, 4比特的第一信令仅包括灵活子帧的属性配置, 9比特的第 一信令包括灵活子帧的属性配置和信号信道配置; 6比特的虚拟 CRC信息和 16比特的 CRC信息,这样,总共需要 26比特。在现有 DCI格式中, DCI format 1C的信息比特数最少, 为了不增加盲检测次数, 可以让指示动态 TDD子帧配 置的 DCI格式的信息比特数和 DCI format 1C一样。 如果少于 DCI format 1C 的比特数, 例如, 20MHz对应的 DCI format 1C为 31比特, 指示动态 TDD子 帧配置的 DCI格式为 26比特, 那么添加冗余信息比特位(即预留比特位) , 或加长虚拟 CRC位, 使两种格式都为 31比特。 为了提高性能, 还可以设置该 DCI格式只采用 4和 8的 CCE聚合级。
方式②: 该 DCI格式除了指示第一信令外, 还可以指示其它信息, 例如 PDCCH盲检测信息(用于降低用户设备的盲检测次数) , PDCCH 的预编码 ( Precoding )信息。
需要说明的是, 机制一中的方式一可以结合方式二或方式三使用。 例如, 方式一和方式二结合使用时, 配置至少两个用户设备需要获取的 TPC信息和 第一信令都承载于同一个 PDCCH中。
其中, 步骤 304还可以通过其他的处理机制来承载第一信令:
机制二, 所述下行控制信道为物理层混合自动重传请求指示信道, 采用 PHICH承载第一信令。
group seq group
PHICH资源由 nPHicH和 nPHicH标识, 其中, nPHICH指示的是 PHICH组号, seq
nPHicH指示的是一个 PHICH组内的正交序列号。
在机制二中, 具体的,基站通过预先定义预留的物理层混合自动重传请求 指示信道资源的方式,或者采用第三信令通知消息的方式告知用户设备物理层 混合自动重传请求指示信道资源。
在本实施例中可以采用预留 PHICH资源的方式, 来承载第一信令。其中, 预留的 PHICH资源不能再用作 HARQ指示(HI, HARQ indicator ) 。 预留方 式可以如下所示:
n group seq 方式一: 预先定义预留的 PHICH资源。具体地,可以通过 nPHicH和 nPHicH 定义预留的 PHICH资源。 当不是所有子帧都预留 PHICH资源时,还需要定义 预留 PHICH资源的子帧号。 例如, 定义每个无线帧的 0, 1 , 5和 6号子帧预 留 PHICH 资源用于承载第一信令。 对于一个下行子帧对应 2 个上行子帧的 PHICH时, 总的 PHICH资源会增加一倍, 此时, PHICH资源分成 2部分, 引 入1 PHICH标识可以指示具体是哪一部份。 因此,也需要定义预留的 PHICH资源 属于哪部分的 PHICH资源, 具体定义预留的 ^HICH 。
方式二: 基站信令通知用户设备预留的 PHICH资源。 优选地, 采用高层
„ group „ seq , 信令的方式进行通知。 具体地, 可以通知预留的 ΗΡΗ Η和 nPHICH。 当不是所有子 帧都预留 PHICH资源时, 还需要通知预留 PHICH资源的子帧号, 例如, 通知 每个无线帧的 0, 1 , 5和 6号子帧预留 PHICH资源用于承载动态 TDD子帧配 置信令。 对于一个下行子帧对应两个上行子帧的 PHICH时, 还需要通知预留 的1 PHICH , 其中, 在方式二中基站通知用户设备的信令即为前述第三信令通知 消息。
在本实施例中, 把第一信令映射到预留的 PHICH资源上的方法是: 根据 一个或多个子帧内预留的 PHICH资源对第一信令进行编码。 例如, 第一信令 的原始比特为 2比特,一个子帧内预留了 6份 PHICH资源,可以对 TDD子帧 配置信令编码成 6比特后, 再分别通过 6份 PHICH资源承载。 所述编码可以 是筒单的重复编码或其它编码方法。
步骤 304的实现也可以采用机制三: 采用 PCFICH承载第一信令。 具体的,机制三在实现时可以采用 PCFICH的预留的状态 4来指示第一信 令。
步骤 304的实现也可以采用机制四: 采用冗余的 REG承载第一信令。 一般情况下, 下行控制区域会出现冗余的资源元素组 ( REG , Resource-dement group ) 。 冗余的 REG可用于承载第一信令, 而根据冗余的 REG资源大小对第一信令进行编码。
需要说明的是, 本发明在实际应用中,还可以通过广播的方式配置灵活子 帧的子帧号及其属性以及灵活子帧上的信道信号配置。其中, 广播消息存在主 信息块( MIB , Master Information Block )和系统信息块( SIB , System Information Block ) 两种形式。 当采用 MIB ^f 载时, 可以用 MIB中的冗余比特通知用户。 当采用 SIB承载时, 需要添加新的 IE。
需要说明的是, 对于前述的各方法实施例, 为了筒单描述, 故将其都表述 为一系列的动作组合,但是本领域技术人员应该知悉, 本发明并不受所描述的 动作顺序的限制,因为依据本发明,某些步骤可以采用其他顺序或者同时进行。 其次, 本领域技术人员也应该知悉,说明书中所描述的实施例均属于优选实施 例, 所涉及的动作和单元并不一定是本发明所必须的。 与上述本发明实施例所提供的方法相对应, 参见图 4, 本发明实施例还提 供了一种应用于时分双工系统的基站的结构示意图, 所述基站具体可以包括: 处理单元一 401 , 用于确定无线帧中灵活子帧的子帧号;
处理单元二 402, 用于确定所述处理单元一确定的所述子帧号对应的灵活 子帧的属性; 所述属性表示灵活子帧为上行子帧或下行子帧。
发送单元 403, 用于通过下行控制信道向所述用户设备发送第一信令, 所 述第一信令包括所述处理单元二确定的所述子帧号对应的灵活子帧的属性。
在不同的实际应用或者实施例中, 参考图 5所示, 所述基站还可以包括: 处理单元三 501 , 用于确定所述处理单元二确定的所述子帧号对应的灵活 子帧的信道和信号配置;
则所述发送单元 403 , 还用于通过所述第一信令或高层信令, 通知所述用 户设备所述处理单元三确定的信道和信号配置。 单元
在实际应用中,所述信道和信号配置可以通过下行控制信道发送给用户设 备, 也可以通过高层信令发送给用户设备。 需要说明的是, 当所述信道和信号 配置通过下行控制信道发送给用户设备时, 作为实际应用中的一个具体实施 例,灵活子帧的信道和信号配置也可以由发送单元 403通过第一信令向用户终 端发送信道和信号配置。
在另一个实施例中, 所述基站还可以包括:
所述发送单元,进一步用于通过第一信令或高层信令通知用户设备灵活子 帧的子帧号。
其中, 灵活子帧的子帧号可以通过下行控制信道通知用户设备,也可以通 过高层信令通知用户设备。 当所述子帧号通过下行控制信道发送给用户设备 时, 可以由发送单元通过第一信令向用户设备发送信道和信号配置
所述发送单元 403依据下行控制信道的不同而有所不同,在另一个实施例 中, 当所述下行控制信道为物理层下行控制信道时, 参考图 6, 所述发送单元 403具体可以包括:
配置子单元 601 , 用于给至少两个用户设备配置相同的下行控制信息; 所 述下行控制信息的比特位中包括指示所述第一信令的比特位;
第一发送子单元 602, 用于通过公共搜索空间中的物理层下行控制信道向 用户设备发送所述相同的下行控制信息,以便于用户设备通过所述下行控制信 息中指示的比特位获得第一信令。
在另一个实施例中, 当所述下行控制信道为物理层下行控制信道时, 参考 图 7所示, 所述发送单元 403具体可以包括: 第一承载子单元 701 , 用于将所述第一信令承载在下行控制信息中预留的 比特位上, 所述下行控制信息为 DCI格式 3, DCI格式 3A和 DCI格式 1A中 的至少一种;
第一发送子单元 702, 用于将所述下行控制信息通过所述物理层下行控制 信道发送给用户设备。
在另一个实施例中,当所述下行控制信道为物理层混合自动重传请求指示 信道时, 参考图 8所示, 所述发送单元 403具体可以包括:
第二承载子单元 801 , 用于将所述第一信令承载在所述物理层混合自动重 传请求指示信道的预留资源上;
第二发送子单元 802, 用于在所述物理层混合自动重传请求指示信道资源 上向用户设备发送第一信令。
在实际应用中, 所述基站还可以包括: 数据处理单元, 用于依据第一信令 接收用户设备发送的当前无线帧的业务数据; 或者,依据第一信令向用户设备 发送当前无线帧的业务数据。 参考图 9所示,示出了本发明应用于时分双工系统中子帧配置的方法实施 例的流程图, 应用于时分双工系统中的终端上, 本实施例具体可以包括: 步骤 901: 用户设备获取灵活子帧的子帧号。
用户设备在获取灵活子帧的子帧号时,可以通过接收基站的信令通知来确
Figure imgf000019_0001
基站确定灵活子帧的子帧号的过程在实施例一中已经详细介绍,在此不再 述。
步骤 902: 用户设备接收基站通过下行控制信道发送的第一信令, 所述第 信令包括所述子帧号对应的灵活子帧的属性,所述属性表示灵活子帧为上行 子帧或下行子帧。
步骤 903: 根据接收的所述第一信令, 获取所述子帧号对应的灵活子帧的 属性。
在不同的实施例中, 用户设备接收到灵活子帧的属性之后,还可以接收基 站通过下行控制信道和 /或高层信令发送的灵活子帧的信道和信号配置。 可选 的是, 当灵活子帧的信道和信号配置也是通过下行控制信道指示时, 所述第一 信令还可以包括灵活子帧的信道和信号配置。
在不同的实施例中, 用户设备确定灵活子帧的属性之前,还可以接收基站 通过下行控制信道或高层信令通知的灵活子帧的子帧号。可选的是, 当灵活子 帧的子帧号也是通过下行控制信道指示时,所述第一信令还可以包括灵活子帧 的子帧号。
需要说明的是, 因为用户设备侧的方法流程与基站侧的方法流程相关, 只 是基站侧是第一信令的发送端, 而用户设备则是第一信令的接收端, 因此有关 第一信令,以及用户设备通过下行控制信道的不同机制可以参见前述基站侧的 方法介绍。
本实施例通过下行控制信道可以接收基站配置好的灵活子帧的属性,解决 了现有技术中无法信令通知用户设备灵活子帧配置的问题,同时信令的可靠性 较高, 可以使得用户设备正确获取灵活子帧配置。 其中, 灵活子帧配置可以包 括灵活子帧的子帧号配置以及灵活子帧的属性配置。进一步的,还可以包括灵 活子帧的信道和信号配置。
参考图 10所示, 示出了本发明应用于时分双工系统中的用户设备的结构 示意图, 该用户设备可以包括:
处理单元四 1001 , 用于确定灵活子帧的子帧号;
接收单元 1002, 用于在基站确定当前无线帧中灵活子帧的属性之后, 接 收基站通过下行控制信道发送的第一信令,所述第一信令包括所述子帧号对应 的灵活子帧的属性, 所述属性表示灵活子帧为上行子帧或下行子帧。 获取单元 1003, 用于根据接收的所述第一信令, 获取所述子帧号对应的 灵活子帧的属性。
在不同的实施例中, 所述接收单元, 进一步可以用于接收基站通过所述第 一信令和 /或高层信令发送的灵活子帧的信道和信号配置。 可选的是, 当灵活 子帧的信道和信号配置也是通过下行控制信道指示时,所述第一信令还可以包 括灵活子帧的信道和信号配置。
在不同的实施例中, 所述接收单元, 进一步可以用于接收基站通过所述第 一信令或高层信令通知的灵活子帧的子帧号。可选的是, 当灵活子帧的子帧号 也是通过下行控制信道指示时,所述第一信令还可以包括灵活子帧的子帧号单 元。
本发明实施例提供了时分双工系统中另一种子帧配置的方法实施例,用于 步骤 1101: 基站向演进版本的用户设备发送第二信令, 所述第二信令指 示上下行子帧配比。
其中, 所述第二信令指示的上下行子帧配比可以不同于通知非演进版本 (例如 LTE Rd-8/9/lO )用户设备的上下行子帧配比。 例如, 当前通知非演进 版本用户设备的上下行子帧配比为子帧配比 2, 而通知演进版本用户设备的上 下行子帧配比为子帧配比 1。 这样, 既可以保证现有版本的兼容性, 又可以根 据上下行的业务需求, 灵活改变演进版本的上下行子帧配比。
对于非演进版本(例如 LTE Rel-8/9/lO )用户设备, 系统通过广播信令通 知当前的 7种上下行子帧配比。
对于演进系统(例如 LTE Rel-11/12等) 的用户设备, 基站可以通过高层 信令或下行控制信道半静态地或动态地通知当前的上下行子帧配比(可以为现 有的 7种上下行子帧配比, 也可以新增加上下行子帧配比)。 通知的频率可以 是周期的, 也可以是半持续的。 具体地, 当采用高层信令时, 可以采用 RRC 信令或 MAC信令,这样可以分别配置用户设备当前的上下行子帧配比,例如, 可以通知部分演进版本用户设备采用和现有版本用户设备不一样的上下行子 帧配比, 又例如, 可以对不同的演进版本用户设备配置不一样的上下行子帧配 比。 当采用物理下行控制信道时, 可以采用实施例二步骤 304中所提供的方法 (区别在于实施例二中承载第一信令,本实施例承载第二信令),通过 PDCCH, 或 PHICH, 或 PCFICH, 或冗余的 REG承载第二信令。
另外, 基站可以配置第二信令的有效时间 (duration ) , 有效时间的最小 单位可以是无线帧级(一个无线帧 10ms ) , 例如, 基站配置当前的第二信令 在 100个无线帧内有效或 50个无线帧内有效; 最小单位也可以是毫秒(ms ) 级, 例如, 基站配置当前的第二信令在 100ms内有效或 1000ms内有效。 第二 信令的有效时间的具体配置通知方法可以包括以下方法:
方法一, 第二信令的有效时间通过高层信令通知。具体地,可以采用 RRC 信令或 MAC信令。 当第二信令是通过高层信令通知时, 该有效时间的通知可 以和第二信令一起发送。
方法二, 第二信令的有效时间通过物理下行控制信道通知。 当第二信令是 通过物理下行控制信道通知时, 该有效时间的通知可以和第二信令一起发送。
方法三, 预先定义。 标准可以预先定义第二信令的有效时间, 例如 100 个无线帧。
在本实施例中,通过高层信令或下行控制信道可以单独指示演进版本的用 户设备的上下行子帧配比,解决了现有技术中无法信令通知用户设备灵活子帧 配置的问题, 同时信令的可靠性较高, 可以使得用户设备正确获取灵活子帧配 置。
与上述本发明实施例所提供的方法相对应,本发明实施例还提供了一种应 用于时分双工系统的基站, 参考图 12, 所述基站具体可以包括: 发送第二信令单元 1201 , 用于向演进版本的用户设备发送第二信令, 所 述第二信令指示上下行子帧配比。
当基站还需要通过高层信令或物理下行控制信道通知第二信令的有效时 间时, 参考图 13, 基站侧还包括:
通知单元 1301 , 用于向演进版本的用户设备通知第二信令的有效时间。 与上述本发明实施例所提供的方法相对应,本发明实施例提供了时分双工 系统中另一种子帧配置的方法实施例, 用于用户设备侧, 参考图 14, 实现本 发明实施例所提供的方法可以包括以下步骤:
步骤 1401: 演进版本的用户设备接收基站发送的第二信令, 所述第二信 令指示上下行子帧配比。
其中, 所述第二信令指示的上下行子帧配比可以不同于通知非演进版本
(例如 LTE Rd-8/9/lO )用户设备的上下行子帧配比。 演进版本的用户设备可 以通过接收高层信令或下行控制信道半静态地或动态地获知上下行子帧配比。
另外, 演进版本的用户设备需要获取第二信令的有效时间 (duration ) 。 第二信令的有效时间的具体获取方法可以包括以下方法:
方法一, 接收高层信令获取第二信令的有效时间。
方法二, 接收物理下行控制信道获取第二信令的有效时间。
方法三, 预先定义。
与上述本发明实施例所提供的方法相对应,本发明实施例还提供了一种应 用于时分双工系统的用户设备, 参考图 15, 所述用户设备具体可以包括: 接收第二信令单元 1501 , 用于接收基站发送的第二信令, 所述第二信令 指示上下行子帧配比。 该单元仅在演进版本的用户设备上配置。
当用户设备还需要接收高层信令或物理下行控制信道获取第二信令的有 效时间时, 参考图 16, 用户设备还包括:
获取单元 1601 , 用于接收高层信令或物理下行控制信道获取第二信令的 有效时间。 该单元仅在演进版本的用户设备上配置。
需要说明的是, 本说明书中的各个实施例均采用递进的方式描述,每个实 施例重点说明的都是与其他实施例的不同之处,各个实施例之间相同相似的部 分互相参见即可。对于装置及系统类实施例而言, 由于其与方法实施例基本相 似, 所以描述的比较筒单, 相关之处参见方法实施例的部分说明即可。
还需要说明的是, 在本文中, 术语 "包括" 、 "包含" 或者其任何其他变 体意在涵盖非排他性的包含, 从而使得包括一系列要素的过程、 方法、 物品或 者设备不仅包括那些要素, 而且还包括没有明确列出的其他要素, 或者是还包 括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下, 由语句 "包括一个 ... ... "限定的要素,并不排除在包括所述要素的过程、方法、 物品或者设备中还存在另外的相同要素。
本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分步 骤是可以通过程序来指令相关的硬件来完成,该程序可以存储于一计算机可读 存储介质中, 存储介质可以包括: ROM、 RAM, 磁盘或光盘等。
以上对本发明实施例所提供的时分双工系统中子帧配置的方法、基站及用 行了阐述, 以上实施例的说明只是用于帮助理解本发明实施例的方法及其思 想; 同时, 对于本领域的一般技术人员, 依据本发明实施例的思想, 在具体实 施方式及应用范围上均会有改变之处, 综上所述, 本说明书内容不应理解为对 本发明的限制。
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Claims

权 利 要 求
1、 一种时分双工系统中子帧配置的方法, 其特征在于, 该方法包括: 基站确定无线帧中灵活子帧的子帧号;
所述基站确定所述子帧号对应的灵活子帧的属性,所述属性表示所述子帧 号对应的灵活子帧为上行子帧或下行子帧;
所述基站通过下行控制信道向用户设备发送第一信令,所述第一信令包括 所述子帧号对应的灵活子帧的属性。
2、 根据权利要求 1所述的方法, 其特征在于, 进一步包括:
所述基站确定所述子帧号对应的灵活子帧的信道和信号配置;
所述基站通过下行控制信道和 /或高层信令通知所述用户设备所述确定的 信道和信号配置。
3、 根据权利要求 2所述的方法, 其特征在于, 所述基站通过下行控制信 道通知所述用户设备灵活子帧的信道和信号配置具体为:所述基站通过第一信 令通知所述用户设备所述确定的信道和信号配置,所述第一信令还包括所述确 定的的信道和信号配置。
4、 根据权利要求 1所述的方法, 其特征在于, 所述基站确定无线子帧中 灵活子帧的子帧号具体包括:
才艮据预先定义的灵活子帧的子帧号, 确定无线子帧中灵活子帧的子帧号。
5、 根据权利要求 1所述的方法, 其特征在于, 进一步包括:
所述基站通过下行控制信道或高层信令通知所述用户设备灵活子帧的子 帧号。
6、 根据权利要求 5所述的方法, 其特征在于, 所述基站通过下行控制信 道通知所述用户设备灵活子帧的子帧号具体为:所述基站通过第一信令通知所 述用户设备所述灵活子帧的子帧号, 所述第一信令还包括灵活子帧的子帧号。
7、 根据权利要求 1、 3或 4所述的方法, 其特征在于, 所述下行控制信道 为: 物理层下行控制信道、物理层混合自动重传请求指示信道或物理层控制格 式指示信道。
8、 根据权利要求 7所述的方法, 其特征在于, 如果所述下行控制信道为 物理层下行控制信道, 所述基站通过下行控制信道向用户设备发送第一信令, 具体包括:
基站给至少两个用户设备配置相同的下行控制信息,所述下行控制信息的 比特位中包括指示所述第一信令的比特位;
基站通过公共搜索空间中的物理层下行控制信道向用户设备发送所述相 同的下行控制信息,以便于所述至少两个用户设备通过所述下行控制信息的比 特位获得所述第一信令。
9、 根据权利要求 7所述的方法, 其特征在于, 如果所述下行控制信道为 物理层下行控制信道, 所述基站通过下行控制信道向用户设备发送第一信令, 包括:
所述基站将所述第一信令承载在下行控制信息中预留的比特位上,所述下 行控制信息为 DCI格式 3, DCI格式 3A和 DCI格式 1A中的至少一种;
所述基站将所述下行控制信息通过公共搜索空间中的所述物理层下行控 制信道发送给用户设备。
10、 根据权利要求 7所述的方法, 其特征在于, 如果所述下行控制信道为 物理层混合自动重传请求指示信道,所述基站通过下行控制信道向用户设备发 送第一信令, 包括:
所述基站将所述第一信令承载在所述物理层混合自动重传请求指示信道 的预留资源上;
所述基站通过所述物理层混合自动重传请求指示信道向所述用户设备发 送第一信令。
11、 一种基站, 应用于时分双工系统中, 与用户设备通信, 其特征在于, 包括:
处理单元一, 用于确定无线帧中灵活子帧的子帧号;
处理单元二,用于确定所述处理单元一确定的所述子帧号对应的灵活子帧 的属性; 所述属性表示灵活子帧为上行子帧或下行子帧;
发送单元, 用于通过下行控制信道向所述用户设备发送第一信令, 所述第 一信令包括所述处理单元二确定的所述子帧号对应的灵活子帧的属性。
12、 根据权利要求 11所述的基站, 其特征在于, 还包括:
处理单元三,用于确定所述处理单元二确定的所述子帧号对应的灵活子帧 的信道和信号配置;
所述发送单元用于通过所述第一信令或高层信令,通知所述用户设备所述 处理单元三确定的信道和信号配置。
13、 根据权利要求 11所述的基站, 其特征在于, 所述发送单元, 还用于 通过所述第一信令或高层信令通知所述用户设备所述处理单元一确定的灵活 子帧的子帧号。
14、 根据权利要求 11所述的基站, 其特征在于, 当所述下行控制信道为 物理层下行控制信道时, 所述发送单元, 具体包括:
配置子单元, 用于给至少两个用户设备配置相同的下行控制信息; 所述下 行控制信息的比特位中包括指示所述第一信令的比特位;
发送子单元,用于通过公共搜索空间中的物理层下行控制信道向用户设备 发送所述相同的下行控制信息,以便于用户设备通过所述下行控制信息中指示 的比特位获得第一信令。
15、 根据权利要求 11所述的基站, 其特征在于, 当所述下行控制信道为 物理层下行控制信道时, 所述发送单元, 包括:
第一承载子单元,用于将所述第一信令承载在下行控制信息中预留的比特 位上, 所述下行控制信息为 DCI格式 3, DCI格式 3A和 DCI格式 1A中的至 少一种;
第一发送子单元,用于将所述下行控制信息通过所述物理层下行控制信道 发送给用户设备。
16、 根据权利要求 11所述的基站, 其特征在于, 当所述下行控制信道为 物理层混合自动重传请求指示信道时, 所述发送单元包括:
第二承载子单元,用于将所述第一信令承载在所述物理层混合自动重传请 求指示信道的预留资源上;
第二发送子单元,用于通过所述物理层混合自动重传请求指示信道资源向 所述用户设备发送第一信令。
17、 一种时分双工系统中子帧配置的方法, 其特征在于, 该方法包括: 用户设备获取灵活子帧的子帧号;
接收基站通过下行控制信道发送的第一信令,所述第一信令包括所述子帧 号对应的灵活子帧的属性, 所述属性表示灵活子帧为上行子帧或下行子帧; 根据接收的所述第一信令, 获取所述子帧号对应的灵活子帧的属性。
18、 根据权利要求 17所述的方法, 其特征在于, 还包括:
所述用户设备接收所述基站通过下行控制信道和 /或高层信令通知的所述 子帧号对应的灵活子帧的信道和信号配置。
19、 根据权利要求 17所述的方法, 其特征在于, 所述用户设备接收所述 基站通过下行控制信道通知的所述子帧号对应的灵活子帧的信道和信号配置 具体为: 所述用户设备接收所述基站发送的所述第一信令, 所述第一信令包括 所述子帧号对应的灵活子帧的信道和信号配置。
20、 根据权利要求 17所述的方法, 其特征在于, 还包括:
用户设备接收所述基站通过下行控制信道或高层信令通知的所述子帧号。
21、 根据权利要求 20所述的方法, 其特征在于, 所述用户设备接收所述 基站通过下行控制信道通知的所述子帧号具体为:所述用户设备接收所述基站 发送的所述第一信令, 所述第一信令包括所述子帧号。
22、 一种用户设备, 应用于时分双工系统中, 与基站通信, 其特征在于, 包括:
处理单元四, 用于确定灵活子帧的子帧号;
接收单元, 用于接收基站通过下行控制信道发送的第一信令, 所述第一信 子帧为上行子帧或下行子帧;
获取单元, 用于根据所述接收单元接收的所述第一信令, 获取所述子帧号 对应的灵活子帧的属性。
23、 根据权利要求 22所述的用户设备, 其特征在于, 所述接收单元, 进 一步用于接收所述基站通过所述第一信令和 /或高层信令发送的所述处理单元 确定的子帧号对应的灵活子帧的信道和信号配置。
24、 根据权利要求 22所述的用户设备, 其特征在于, 所述接收单元, 进 一步用于接收所述基站通过所述第一信令或高层信令通知的所述处理单元确 定的子帧号。
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