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WO2011097998A1 - 非竞争随机接入的调度及前导码发送方法、系统和设备 - Google Patents

非竞争随机接入的调度及前导码发送方法、系统和设备 Download PDF

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Publication number
WO2011097998A1
WO2011097998A1 PCT/CN2011/070744 CN2011070744W WO2011097998A1 WO 2011097998 A1 WO2011097998 A1 WO 2011097998A1 CN 2011070744 W CN2011070744 W CN 2011070744W WO 2011097998 A1 WO2011097998 A1 WO 2011097998A1
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WIPO (PCT)
Prior art keywords
terminal
dci signaling
random access
base station
identification information
Prior art date
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PCT/CN2011/070744
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English (en)
French (fr)
Inventor
潘学明
沈祖康
赵锐
肖国军
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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Priority to US13/578,338 priority Critical patent/US20120307777A1/en
Priority to EP11741869A priority patent/EP2536203A4/en
Priority to KR1020127022383A priority patent/KR101407604B1/ko
Publication of WO2011097998A1 publication Critical patent/WO2011097998A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/002Transmission of channel access control information
    • H04W74/006Transmission of channel access control information in the downlink, i.e. towards the terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0833Random access procedures, e.g. with 4-step access
    • H04W74/0838Random access procedures, e.g. with 4-step access using contention-free random access [CFRA]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0003Two-dimensional division
    • H04L5/0005Time-frequency
    • H04L5/0007Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H04L5/001Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
    • 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
    • H04W72/232Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/002Transmission of channel access control information
    • H04W74/004Transmission of channel access control information in the uplink, i.e. towards network

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a scheduling, preamble sending method, system and device for non-contention random access. Background technique
  • LTE Long Term Evolution
  • the former is generally applicable to the initial access of the terminal, and the random access channel and the preamble sequence used in the random access are randomly selected by the terminal (UE) in the configuration set broadcasted by the base station;
  • the terminal For the downlink data arrival or handover scenario, that is, the base station needs the terminal to initiate random access to establish uplink synchronization, so that subsequent data transmission can be performed normally, and the random access channel and the preamble sequence used in the non-contention random access are the base station
  • the signaling is sent to the terminal, specifically through signaling of a physical downlink control channel (PDCCH).
  • PDCH physical downlink control channel
  • LTE-Advanced For the LTE-Advanced system, in order to support a wider system bandwidth than the LTE system, such as 100 MHz, it is necessary to connect multiple LTE carrier (also known as component carrier) resources. the way:
  • the first type aggregates multiple consecutive LTE carriers to provide greater transmission bandwidth for LTE-A (upgraded long-term evolution);
  • the LTE R8 terminal can work normally on each member carrier.
  • 3GPP has determined that the initial random access procedure gives the conclusion that the random access procedure is only performed on a single carrier in the same manner as LTE Release 8 (R8). Random access to non-contention is still under study and discussion. The study found that non-contention random access is also along Single-carrier transmission with LTE R8 cannot be applied to all scenarios. In some cases, non-contention random access using cross-carrier scheduling must be used, or the performance of the system can be improved.
  • the non-contention random access procedure includes the following steps, as shown in FIG. 2: Step 0: The base station allocates a specific preamble sequence to the UE by using the PDCCH of the downlink carrier according to the current service requirement.
  • Step 1 After receiving the signaling indication on the PDCCH, the UE sends the specified preamble sequence to the corresponding uplink carrier with a specific time-frequency resource.
  • Step 2 After receiving the preamble sequence of the random access, the base station sends a random access response on the downlink carrier. Perform subsequent signaling interactions and data transmission.
  • Each carrier independently transmits a PDCCH, and the PDCCH can only schedule the physical resources of the carrier, as shown in FIG. 3;
  • Solution 2 scheduling multiple carrier resources by using multiple independent PDCCHs carried on one or more carriers. This solution is an improvement to scheme 1. In this case, only one carrier resource can be scheduled for each PDCCH. Taking a carrier wave carrying multiple PDCCHs as an example, as shown in FIG. 4;
  • the 3GPP standard discusses that LTE-A users support non-cross-carrier scheduling and cross-carrier scheduling modes at the same time, and the base station schedules the terminal to be in any mode according to actual needs.
  • cell 1 uses downlink member carrier 1 (DL CC1 ) as a high power PDCCH transmission carrier
  • cell 2 uses downlink component carrier 2 (DL CC2 ) as a high power PDCCH.
  • Carrier the PDCCH of other carriers uses low power transmission. Limited in interference
  • the PDCCH sent in the high-power carrier can be used to schedule data transmission of each downlink/uplink carrier to ensure the reliability of the PDCCH transmission.
  • CC type component carrier type
  • LTE-A Long Term Evolution-Advanced Evolution-Advanced Evolution-Advanced Evolution-Carrier
  • the extension carrier may only contain the transmission of data, not including control signaling.
  • the DL CC1 of the cell 1 is an R8 compatible carrier
  • the CC2 is an extension carrier, and only the data is included, and all the PDCCHs of the transmission scheduling signaling in the cell 1 need to be sent on the DL CC1, and the cross-carrier scheduling is adopted.
  • the mode is to schedule DL CC2 and UL CC2.
  • the base station needs to schedule the UE to send a non-contention physical random access control channel on each uplink CC ( PRACH).
  • PRACH physical random access control channel
  • the non-contention random access is scheduled by the PDCCH.
  • the PDCCH can only be transmitted in a specific carrier or better, so the PDCCH with non-contention random access is scheduled.
  • Cross-carrier scheduling is also required.
  • Scenario 1 In the case where no repeater (rebeater), RRU (remote radio unit), and multipoint coordination (CoMP) are introduced, the TAs of the respective CCs are the same, as shown in Fig. 7.
  • Scenario 2 The repeater is introduced.
  • the repeater has different frequency selectivity.
  • the CC of different CCs may be different, as shown in Figure 8.
  • Scenario 3 Non-collocated Sites. Different CCs are sent through different sites. The TA of each CC may be different, as shown in Figure 9.
  • Scenario 4 For the above ⁇ CoMP, the terminal is different for the TAs of different sites participating in the collaboration. In this case, if the TA on each CC is different, if the operation of the carrier aggregation is required, the aggregated CC needs to be uplink synchronized.
  • the method for the terminal to receive the PDCCH adopting the blind detection is specifically that the PDCCH of the common search space and the UE-specific search space needs to be blindly detected at the same time, and the CCE aggregation level of the PDCCH may be 1, 2, 4, or 8.
  • the CCE aggregation level of the PDCCH may be 1, 2, 4, or 8.
  • DCI Downlink Control Indicator
  • the UE In the common search space, the UE needs to be blindly checked by SI-RNTI (temporary identification of wireless network of system information), P-RNTI (dedicated wireless network temporary identification), and RA-RNTI (random access wireless network temporary identification)
  • SI-RNTI temporary identification of wireless network of system information
  • P-RNTI dedicated wireless network temporary identification
  • RA-RNTI random access wireless network temporary identification
  • the scrambled PDCCH is used for receiving system information, paging information, and random access response information, respectively.
  • the UE also needs to blindly check the PDCCH scrambled by the Cell Radio Network Temporary Identity (C-RNTI), and the format is DCI format 1 A.
  • C-RNTI Cell Radio Network Temporary Identity
  • the UE needs to blindly check DCIs of different formats according to different transmission modes, including DCI format 1 A, DCI format 1, DCI format 1B, and DCI format 1D.
  • the base station uses the C-RNTI scrambled DCI format 1A to perform non-contention random access scheduling.
  • the specific DCI length is the same as that of the normal DCI format 1A, but the specific information field meaning is special.
  • the definition is as follows:
  • Format 0 and format 1 distinguish the flag field (Flag for formatO/formatlA differentiation), occupy 1 bit. When the value is 0, it indicates the format 0. When the value is 1, it indicates the format 1. Same as normal DCI format 1 ⁇ ;
  • the localized/distributed VRB assignment flag takes 1 bit and takes a value of 0. Since the scheduling non-contention random access does not need to use the information field, it is set to 0; the resource block assignment (Resource block assignment) occupies " ⁇ 2 « ( ⁇ + 1 ) / 2 ) 1 bit, all bits are set. Is 1, where is the system bandwidth, in units of physical resource blocks (PRBs); the preamble index field (preamble index), occupying 6 bits, is the random access preamble sequence number.
  • the PRACH mask identification field (Mask Index), occupying 4 bits, indicating the PRACH channel number used by the random access;
  • DCI format 1 A has various functions, including: scheduling system information in a common search space, scrambling with SI-RNTI; scheduling paging information in a common search space, scrambling with P-RNTI Scheduling random access response information in the common search space, scrambling with RA-RNTI; scheduling user-specific data in the common search space, scrambling with C-RNTI; scheduling non-contention random access in the common search space, Scrambling with CR TI; scheduling user-specific data in the UE's exclusive search space, scrambling with C-RNTI; scheduling non-contention random access in the UE's exclusive search space, scrambling with C-RNTI.
  • Embodiments of the present invention provide a scheduling and preamble transmission method and system problem for non-contention random access.
  • a scheduling method for non-contention random access in a carrier aggregation system includes: the base station adds uplink component carrier identification information to a downlink control indication DCI signaling used by the scheduling terminal to perform non-contention random access;
  • the base station transmits the DCI signaling to the terminal through a physical downlink control channel PDCCH, indicating bad preamble sequence 1 j.
  • a preamble transmission method in a carrier aggregation system comprising:
  • the terminal performs blind detection on the physical downlink control channel PDCCH;
  • the terminal determines that the uplink component carrier identifier information is carried and is used to schedule the terminal to perform Non-contention random access DCI signaling; code preamble sequence.
  • a base station comprising:
  • the carrier wave information adding unit is configured to add uplink member wave identification information to the downlink control indication DCI signaling used by the scheduling terminal to perform non-contention random access;
  • DCI signaling sending unit configured to send to the terminal via the PDCCH DCI signaling to indicate bad preamble sequence 1 j.
  • a terminal comprising:
  • a blind detection unit configured to perform blind detection on a physical downlink control channel PDCCH, and determine to detect DCI signaling used by the local terminal to perform non-contention random access, where the uplink component carrier identification information is detected;
  • the sequence sending unit is configured to send, by the terminal, a preamble preamble sequence to the network side on the uplink component carrier corresponding to the uplink member carrier identifier.
  • a wireless communication system comprising:
  • a base station configured to add uplink component carrier identification information in a downlink control indication DCI signaling for scheduling the terminal to perform non-contention random access; and send the DCI signaling to the terminal by using a physical downlink control channel PDCCH;
  • the terminal is configured to perform blind detection on the PDCCH, and determine to detect DCI signaling used by the local terminal to perform non-contention random access, where the uplink member carrier identifier is carried; A preamble sequence of preambles is sent to the network side on the component carrier.
  • the base station adds uplink member wave identification information to the terminal for performing non-contention random access, and transmits the DCI signaling to the terminal through the PDCCH, and the terminal performs blind detection on the PDCCH.
  • the preamble sequence is sent to the network side on the uplink component carrier indicated by the DCI signaling.
  • the uplink component carrier identification information is added in the DCI signaling used for scheduling the terminal to perform non-contention random access, so that the terminal is After detecting the DCI, the uplink component carrier used for transmitting the preamble sequence is determined according to the DCI, and then the preamble sequence is sent on the uplink component carrier, thereby providing support for cross-carrier non-contention random access for implementing PDCCH scheduling. . DRAWINGS
  • FIG. 2 is a schematic diagram of a non-contention random access procedure in the prior art
  • FIG. 3 is a schematic diagram of non-cross-carrier scheduling of a PDCCH in the prior art
  • FIG. 4 is a schematic diagram of cross-carrier scheduling of a PDCCH in the prior art
  • FIG. 5 is a schematic diagram of PDCCH power coordination between cells in the prior art
  • FIG. 7 is a schematic diagram of a scenario 1 in the prior art
  • FIG. 9 is a schematic diagram of a scenario 3 in the prior art.
  • FIG. 10 is a schematic flowchart of a method according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of a system according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 13 is a schematic structural diagram of a terminal according to an embodiment of the present invention. detailed description
  • the embodiment of the present invention provides a scheduling of the non-contention random access and a preamble sending method in the carrier wave aggregation system, and the method
  • the base station sends, to the terminal, the DCI signaling for scheduling the terminal to perform non-contention random access, which carries the uplink component carrier identification information, and the terminal sends the preamble sequence on the uplink component carrier indicated by the DCI signaling.
  • a scheduling method for non-contention random access and a preamble sending method in a carrier aggregation system specifically includes the following steps: Step 10: The base station adds uplink member wave identification information to the DCI signaling used by the scheduling terminal to perform non-contention random access.
  • Step 11 The base station sends a DCI sending preamble sequence 1 J carrying the uplink component carrier identification information to the terminal through the PDCCH;
  • Step 12 The terminal performs blind detection on the PDCCH, and determines that the DCI signaling used to schedule the non-contention random access of the terminal is carried.
  • Step 13 The terminal sends a preamble sequence to the network side on the uplink component carrier corresponding to the uplink member carrier identifier information carried in the detected DCI signaling.
  • step 10 can be implemented in the following two ways:
  • the base station adds a CIF field to the DCI signaling used by the scheduling terminal to perform non-contention random access, and adds the uplink member carrier identification information to the CIF domain.
  • the base station may add a CIF field at any fixed position of the DCI signaling used for scheduling the terminal to perform non-contention random access.
  • the CIF field may be added in the header or the tail of the DCI signaling.
  • the base station may send the DCI signaling carrying the uplink component carrier identification information to the terminal in the terminal-specific search space.
  • the base station uses a part of the idle bits in the DCI signaling as a CIF domain, and uses the CIF domain to carry the uplink member carrier identification information, that is, the downlink component carrier identification information is added in the CIF domain.
  • the base station can also determine whether there are still remaining idle bits in the DCI signaling, and if so, set all remaining idle bits to 0.
  • the base station may send the DCI signaling to the terminal in a common search space or a terminal-specific search space.
  • the DCI signaling detected by the terminal is set to carry The CIF area with the uplink component carrier identification information, and is used for scheduling the terminal to perform non-contention random access DCI signaling.
  • the terminal may be in the terminal-specific search space, and the DCI signaling is detected.
  • the DCI signaling detected by the terminal is DCI signaling carrying the uplink component carrier identification information in the idle domain and scheduling the local terminal to perform non-contention random access.
  • the terminal may detect the DCI signaling in the terminal-specific search space or the common search space.
  • the uplink member carrier identification information carried by the DCI signaling may occupy 3 bits, and the DCI signaling may specifically be a signaling format of DCI format1A.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the CIF domain (occupying 3 bits) is set in a fixed bit position of DCI format with DCI format 1A for scheduling non-contention random access scrambled by C-RNTI, and CIF domain is designed for simplicity.
  • Step S01 The base station sends the DCI signaling carrying the CIF domain to the UE by using the PDCCH of the downlink carrier according to the current service requirement, and the format of the DCI signaling is as follows:
  • the CIF domain which occupies 3 bits, carries the uplink member carrier identification information.
  • Format 0 and format 1 distinguish the flag field (Flag for formatO/formatlA differentiation), occupy 1 bit. For example, a value of 0 indicates format 0, and a value of 1 indicates format 1. Same as normal DCI format 1 ⁇ ;
  • the localized/distributed VRB assignment flag takes 1 bit and takes a value of 0. Since scheduling the non-contention random access does not require the use of the information field, it is set to 0; the resource block assignment (Resource block assignment) occupies " 1 ( ⁇ 2( ⁇ ( ⁇ + 1)/2)"] Bit, all bits are set to 1, where the area 11 is the system bandwidth, in units of physical resource blocks (PRBs); the preamble identifier i or (preamble Index), occupying 6 bits, is a random access preamble sequence number;
  • the PRACH mask identification field (Mask Index), which occupies 4 bits, indicates the PRACH channel number used by the random access;
  • Step S02 After detecting the DCI signaling having the foregoing format on the PDCCH, the UE configured to be in the cross-carrier scheduling mode determines that the DCI signaling is DCI signaling for scheduling non-contention random access, where the DCI signaling is used.
  • the preamble indicated by the preamble identifier field of the DCI signaling is sent to the base station by using the time-frequency resource indicated by the resource block allocation field of the DCI signaling on the uplink component carrier corresponding to the uplink member carrier identifier carried by the CIF domain.
  • Step S03 After receiving the preamble sequence sent by the UE, the base station sends a random access response on the downlink carrier. Perform subsequent signaling interactions and data transmission.
  • the DCI format 1A is also used to schedule system information, paging information, random access response information, and the like in the common search space, such as LTE R8 and LTE- A user public information.
  • the DCI signaling generated based on this embodiment may be placed in the dedicated search space of the UE.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • 3 bits of the idle bits in the DCI signaling of the DCI format 1A in the existing LTE R8 for scheduling non-contention random access are used as the CIF domain. details as follows:
  • Step S11 The base station sends the DCI signaling carrying the CIF domain to the UE by using the PDCCH of the downlink carrier according to the current service requirement.
  • the format of the DCI signaling is as follows:
  • Format 0 and format 1 distinguish the flag field (Flag for formatO/formatlA differentiation), occupy 1 bit. For example, a value of 0 indicates a format 0, and a value of 1 indicates a format 1. Same as normal DCI format 1A;
  • the PRACH mask identification field (Mask Index), which occupies 4 bits, indicates the PRACH channel number used by the random access;
  • the CIF domain which occupies 3 bits, carries the uplink component carrier identification information.
  • Step S12 After detecting, by the UE configured in the cross-carrier scheduling mode, the DCI signaling having the foregoing format on the PDCCH, determining that the DCI signaling is DCI signaling for scheduling non-contention random access, where the DCI signal is used. And transmitting, by using the time-frequency resource indicated by the resource block allocation field of the DCI signaling, the uplink component carrier corresponding to the uplink member carrier identifier carried by the CIF domain, and transmitting, by the base station, the preamble identifier field of the DCI signaling Preamble sequence;
  • Step S13 After receiving the preamble sequence sent by the UE, the base station sends a random access response on the downlink carrier. Perform subsequent signaling interactions and data transmission.
  • the DCI signaling generated based on this embodiment can be placed in the common search space.
  • the first embodiment and the second embodiment may be used separately or in combination, that is, the LTE-A UE configured in the cross-carrier scheduling mode blindly detects the DCI format 1A generated based on the second embodiment in the common search space, and is considered to be used. Scheduling non-contention random access DCI, and transmitting a preamble on a specific UL CC according to the indication of the CIF domain; if the LTE-A UE configured as a cross-carrier scheduling mode is blindly detected in the UK-specific search space, based on method one
  • the generated DCI format 1A is considered to be a DCI that schedules non-contention random access, and sends a preamble on a specific UL CC according to the indication of the CIF domain.
  • an embodiment of the present invention further provides a wireless communication system, where the system includes: a base station 21, configured to add an uplink component carrier in a downlink control indication DCI signaling used to schedule a non-contention random access of the terminal. Identifying information; transmitting the DCI signaling to the terminal by using a physical downlink control channel PDCCH;
  • a base station 21 configured to add an uplink component carrier in a downlink control indication DCI signaling used to schedule a non-contention random access of the terminal. Identifying information; transmitting the DCI signaling to the terminal by using a physical downlink control channel PDCCH;
  • the terminal 22 is configured to perform blind detection on the PDCCH, and determine to detect DCI signaling used by the local terminal to perform non-contention random access, where the uplink component carrier identifier information is detected;
  • the preamble sequence is transmitted to the network side on the member carrier.
  • the base station 21 is configured to:
  • the terminal 22 is configured to:
  • the PDCCH detection is provided with a CIF area carrying the uplink member carrier identification information, and is used for scheduling the DCI signaling of the non-contention random access by the terminal. Specifically, the DCI signaling can be detected in the ⁇ -specific search space. '
  • the base station 21 is configured to:
  • a part of the idle bits in the DCI signaling is used as a CIF domain, and the CIF domain is used to carry the uplink component carrier identification information.
  • the terminal 22 is configured to:
  • the PDCCH detection idle domain carries the uplink member carrier identification information, and is used to schedule the DCI signaling of the non-contention random access by the terminal.
  • the DCI signaling may be detected in a common search space or a terminal-specific search space.
  • an embodiment of the present invention further provides a base station, which can be applied to a wireless communication system, where the base station includes:
  • the carrier information adding unit 30 is configured to add uplink component carrier identification information to the downlink control indication DCI signaling used for scheduling the non-contention random access of the local terminal;
  • the DCI signaling sending unit 31 is configured to send the DCI signaling to the terminal by using a PDCCH, to indicate that the terminal is in the uplink component carrier identifier Code preamble sequence ⁇ l.
  • the carrier information adding unit 30 includes:
  • a domain setting unit configured to add a CIF domain to a fixed location of the DCI signaling used to schedule the non-contention random access of the terminal
  • an identifier adding unit configured to add the uplink member carrier identification information in the CIF domain.
  • the domain setting unit is used to:
  • the CIF field is added to the header or trailer of the DCI signaling used to schedule the non-contention random access of the terminal.
  • the DCI signaling sending unit 31 is configured to:
  • the DCI signaling is sent to the terminal in the terminal-specific search space.
  • the carrier information adding unit 30 is configured to:
  • a part of the idle bits in the DCI signaling is used as a CIF field, and the CIF field is used to carry the uplink component carrier identification information.
  • the information adding unit is further configured to:
  • the DCI signaling sending unit 31 is configured to:
  • an embodiment of the present invention further provides a terminal, where the terminal includes:
  • the blind detection unit 40 is configured to perform blind detection on the physical downlink control channel PDCCH, and determine to detect DCI signaling for carrying out non-contention random access by using the uplink component carrier identifier information;
  • the sequence sending unit 41 is configured to send, by the terminal, a preamble preamble sequence to the network side on the uplink member carrier corresponding to the uplink member carrier identifier.
  • the blind detecting unit 40 includes a first detecting unit and/or a second detecting unit, where: the first detecting unit is configured to detect a CIF area that is provided with an uplink member carrier identification information, and is used to schedule the terminal. Performing DCI signaling for non-contention random access; The second detecting unit is configured to detect DCI signaling that carries the uplink member carrier identifier information in the idle domain and is used to schedule the local terminal to perform non-contention random access.
  • the first detecting unit is configured to:
  • DCI signaling configured to have the CIF area and used to schedule the terminal for non-contention random access is detected.
  • the second detecting unit is configured to: detect, in a common search space or a terminal-specific search space, DCI signaling that carries uplink member wave identification information in an idle domain, and is used to schedule the terminal to perform non-contention random access. .
  • the beneficial effects of the present invention include:
  • the base station adds the uplink member wave identification information to the terminal for performing non-contention random access, and sends the DCI signaling to the terminal through the PDCCH, where the terminal performs the PDCCH.
  • Blind detection when detecting the DCI signaling, sending a preamble sequence to the network side on the uplink component carrier indicated by the DCI signaling.
  • the uplink component carrier identification information is added to the DCI signaling used for the scheduling terminal to perform non-contention random access, so that the terminal can determine, according to the DCI, the used to transmit the preamble sequence, after detecting the DCI.
  • the uplink member waves and then transmits the preamble sequence on the uplink member carrier, thereby providing support for implementing cross-carrier non-contention random access for PDCCH scheduling.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) in which computer usable program code is embodied.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

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Description

非竟争随机接入的调度及前导码发送方法、 系统和设备 技术领域
本发明涉及无线通信领域, 尤其涉及一种非竟争随机接入的调度及前导 码发送方法、 系统和设备。 背景技术
在长期演进(LTE )系统中, 随机接入有两种类型, 基于竟争的随机接入 和非竟争的随机接入。 其中前者通常适用于终端初始接入的情况, 竟争随机 接入中使用的随机接入信道和前导码(preamble )序列是终端 (UE )在基站 广播的配置集合中随机选择的; 后者通常用于下行数据到达或切换场景, 也 就是基站需要终端发起随机接入以建立上行同步使得后续的数据传输能够正 常进行, 非竟争随机接入中使用的随机接入信道和 preamble序列是基站通过 信令通知给终端的, 具体是通过物理下行控制信道(PDCCH ) 的信令。
对于长期演进升级(LTE-Advanced ) 系统, 为支持比 LTE系统更宽的系 统带宽, 比如 100MHz, 需要通过将多个 LTE栽波(又称成员载波) 的资源 连接起来使用, 具体有以下两种方式:
第一种: 将多个连续的 LTE载波进行聚合, 为 LTE-A (升级的长期演进) 提供更大的传输带宽;
第二种: 将多个不连续的 LTE栽波进行聚合, 为 LTE-A提供更大的传输 带宽。 如图 1所示, 为不连续栽波聚合的例子。
与 LTE Release 8 ( R8, 版本 8 )尽量一致, 从而保证 LTE R8的终端能够在每 一个成员载波上正常工作。
在载波聚合系统中, 3GPP已经确定初始的随机接入过程给出结论, 即保 持与 LTE版本 8 ( R8 )相同的方式, 仅在单个栽波上进行随机接入过程。 对 于非竟争的随机接入还在研究和讨论中。 研究发现对于非竟争随机接入也沿 用 LTE R8的单载波发送不能适用于所有的场景, 在一些情况下, 采用跨载波 调度的非竟争随机接入是必须采用的, 或者可以提升系统的性能。
在 LTE系统中, 非竟争的随机接入过程包括如下几个步骤, 如图 2所示: 步骤 0: 基站根据当前的业务需求, 使用下行栽波的 PDCCH为 UE分配 一个特定的 preamble序列;
步骤 1: UE接收到 PDCCH上的信令指示后, 在对应的上行载波以特定 的时频资源发送指定的 preamble序列;
步骤 2: 基站接收到随机接入的 preamble序列后, 在下行载波发送随机 接入响应。 进行后续的信令交互和数据传输。
当前 LTE-A的标准讨论中, 考虑到 PDCCH设计的复杂度, 调度的灵活 性, 以及上下行非对称载波聚合情况,对栽波聚合系统的 PDCCH的设计有下 面两种候选方案: 1 '
方案一: 每个载波独立发送 PDCCH, 该 PDCCH仅能调度本栽波的物理 资源, 如图 3所示;
方案二:使用承载于某一个或多个载波上的多个独立 PDCCH调度多个载 波资源, 该方案是对方案一的一个改进, 在这种情况下, 每条 PDCCH只能调 度一个载波的资源, 以一个栽波承载多个 PDCCH为例, 如图 4所示;
目前 3GPP标准讨论 LTE-A用户同时支持非跨载波调度和跨载波调度模 式, 基站根据实际需要调度终端处于任一模式中。
由于 LTE系统中只有一对上下行载波, 因此如上流程都发生在该一对载 波上。 在 LTE-A系统中, 由于基站类型多样性以及大量的家庭基站、 中继基 站等的密集部署, 小区之间的控制信道同频千扰非常严重, 目前研究表明, 在 LTE-Λ多载波系统中采用相邻小区使用不同成员载波作为高功率 PDCCH 发射载波能够有效的降低系统中的小区间干扰, 提升系统性能。
以图 5为例, 小区 1 ( cell 1 )使用下行成员栽波 1 ( DL CC1 )作为高功 率 PDCCH发送栽波, 小区 2 ( cell 2 )使用下行成员载波 2 ( DL CC2 )作为 高功率 PDCCH发送栽波, 其他载波的 PDCCH使用低功率发射。 在干扰受限 的场景下, 可以使用高功率载波中发送的 PDCCH调度各个下行 /上行载波的 数据发送, 保证 PDCCH传输的可靠性。
此外, 3GPP还在讨论在 LTE-A是否引入新的成员载波类型 (CC type ), ¾前讨论是在 R8兼容的成员栽波(R8 compatible carrier )类型外可能额外引 入一种扩展载波类型 (Extension carrier ), 扩展载波可能只包含数据的发送, 不包含控制信令。如图 6所示, cell 1的 DL CC1为 R8 compatible carrier, CC2 为 Extension carrier, 仅包含数据, 则 cell 1中所有传输调度信令的 PDCCH都 需要在 DL CC1上发送, 并采用跨载波调度的方式调度 DL CC2和 UL CC2。
在图 5和图 6所示场景中, 为了使 UE在每个 UL CC上获得准确的上行 同步,基站需要调度 UE在每个上行 CC上都能够发送非竟争的物理随机接入 控制信道(PRACH )。 前面提到, 非竟争随机接入都是由 PDCCH调度的, 在 图 3和图 4场景中, PDCCH仅能或更优的在特定的栽波发送, 因此调度非竟 争随机接入的 PDCCH也需要支持跨载波调度。
同时在 3GPP无线接入网络 4 ( RAN4 )针对各个 CC的 TA (跟踪区) 是否相同, 规定了如下四种场景:
场景 1 : 在没有引入直放站(repeater )、 RRU (远端射频单元)、 多点协 作 (CoMP ) 的情况下, 各个 CC 的 TA相同, 如图 7所示。
场景 2: 引入 repeater, repeater具有不同频率选择性, 这种情况下不同 CC的 ΤΛ可能不同, 如图 8所示。
场景 3: 非配置的多点发送(Non-collocated Sites ), 不同 CC通过不同 站点发送, 各个 CC 的 TA可能不同, 如图 9所示。
场景 4: 对于上 ^ CoMP, 终端对于参与协作的不同站点的 TA不一样。 这样的话, 在各个 CC上的 TA不同时, 如果需要进行栽波聚合的操作, 那么需要对聚合的 CC进行上行同步。
在 LTE系统中, 终端接收 PDCCH采用盲检测的方法 具体是需要对公 共搜索空间和 UE专属的搜索空间的 PDCCH同时进行盲检测, PDCCH的 CCE 聚合等级可以为 1、 2、 4、 8。 每种 CCE聚合等级下, 要盲检的候选 PDCCH 的个数是不同的。
同时对于每种传输模式需要盲检两种下行控制指示 (Downlink Control Indicator, DCI )格式, 不同的 DCI之间是靠长度来区分, 在用户端根据不同 的聚合等级, DCI格式(DCI format )最多盲检 44次, 其中公共搜索空间 12 次, 用户专属搜索空间 32次。
在公共搜索空间内, UE需要盲检由 SI-RNTI (系统信息的无线网络临时 识别)、 P-RNTI (专用的无线网络临时识别)、 和 RA-RNTI (随机接入的无线 网络临时识别)加扰的 PDCCH, 分别用于系统信息、 寻呼信息、 随机接入响 应信息的接收。 同时, 在公共搜索空间内, UE也需要盲检由小区无线网络临 时标识( C-RNTI )加扰的 PDCCH, 格式为 DCI format 1 A。
在 UE搜索空间内,根据传输模式的不同 , UE需要盲检不同格式的 DCI, 包括 DCI format 1 A、 DCI format 1、 DCI format 1B、 DCI format 1D。
在 LTE R8中, 定义了 DCI format 1A的具体格式。
同时, 在 LTE R8中, 基站使用 C-RNTI加扰的 DCI format 1A进行非竟 争随机接入的调度,具体的 DCI长度与普通的 DCI format 1A完全相同,但具 体的信息域含义进行了特殊定义, 具体如下:
格式 0和格式 1的区分标志域( Flag for formatO/formatlA differentiation ), 占用 1 bit,取值为 0时表示格式 0,取值为 1时表示格式 1。与普通 DCI format 1Λ相同;
本地 /分布式 VRB 分配标志域( Localized/Distributeci VRB assignment flag ), 占用 1 bit,取值为 0。 由于调度非竟争随机接入不需要使用该信息域, 置为 0; 资源块分配域(Resource block assignment ), 占用 「^2« (^^ + 1)/ 2)1比 特, 所有比特均置为 1, 其中 为系统带宽, 以物理资源块(PRB )为单位; 前导码标识域(preamble Index ), 占用 6比特, 为随机接入 preamble序 号 · PRACH掩码标识域(Mask Index ), 占用 4比特, 指示随机接入所使用 的 PRACH信道序号;
其他所有比特域(即空闲域), 置为全 0。
由上述介绍可以看到, DCI format 1 A具有多种功能, 包括: 在公共搜索 空间内调度系统信息, 用 SI-RNTI加扰; 在公共搜索空间内调度寻呼信息, 用 P-RNTI加扰; 在公共搜索空间内调度随机接入响应信息, 用 RA-RNTI加 扰; 在公共搜索空间内调度用户专用数据, 用 C-RNTI加扰; 在公共搜索空间 内调度非竟争随机接入, 用 C-R TI加扰; 在 UE的专属搜索空间内调度用户 专属数据, 用 C-RNTI加扰; 在 UE的专属搜索空间内调度非竟争随机接入, 用 C- RNTI加扰。
在实现本发明的过程中, 发明人发现现有技术中存在以下技术问题: 当 UE被配置为跨载波调度模式时,现有技术无法支持 PDCCH调度的跨 载波非竟争随机接入。 发明内容
本发明实施例提供一种非竟争随机接入的调度及前导码发送方法、 系统 问题。
一种载波聚合系统中的非竟争随机接入的调度方法, 该方法包括: 基站在用于调度终端进行非竟争随机接入的下行控制指示 DCI信令中添 加上行成员载波标识信息;
基站通过物理下行控制信道 PDCCH向终端发送所述 DCI信令, 以指示 preamble序歹1 j。
一种载波聚合系统中的前导码发送方法, 该方法包括:
终端对物理下行控制信道 PDCCH进行盲检测;
终端确定检测到携带有上行成员载波标识信息的、 用于调度本终端进行 非竟争随机接入的 DCI信令; 码 preamble序列。
一种基站, 该基站包括:
栽波信息添加单元, 用于在用于调度终端进行非竟争随机接入的下行控 制指示 DCI信令中添加上行成员栽波标识信息;
DCI信令发送单元, 用于通过 PDCCH向终端发送所述 DCI信令, 以指 preamble序歹1 j。
一种终端, 该终端包括:
盲检测单元, 用于对物理下行控制信道 PDCCH进行盲检测, 并确定检 测到携带有上行成员载波标识信息的、 用于调度本终端进行非竟争随机接入 的 DCI信令;
序列发送单元, 用于终端在所述上行成员栽波标识对应的上行成员载波 上向网络侧发送前导码 preamble序列。
一种无线通信系统, 该系统包括:
基站, 用于在用于调度终端进行非竟争随机接入的下行控制指示 DCI信 令中添加上行成员载波标识信息;通过物理下行控制信道 PDCCH向终端发送 所述 DCI信令; '
终端, 用于对 PDCCH进行盲检测; 确定检测到携带有上行成员栽波标 识信息的、 用于调度本终端进行非竟争随机接入的 DCI信令; 在所述上行成 员载波标识对应的上行成员载波上向网络侧发送前导码 preamble序列。
本发明中, 基站在用于调度终端进行非竟争随机接入的 DCI信令中添加 上行成员栽波标识信息, 并通过 PDCCH 向终端发送该 DCI信令, 终端对 PDCCH进行盲检测, 在检测到该 DCI信令时, 在该 DCI信令所指示的上行 成员载波上向网络侧发送 preamble序列。 可见, 本发明中通过在用于调度终 端进行非竟争随机接入的 DCI信令中添加上行成员载波标识信息, 使得终端 能够在检测到该 DCI后,根据该 DCI确定发送 preamble序列所使用的上行成 员载波, 进而在该上行成员载波上发送 preamble序列, 从而为实现 PDCCH 调度的跨载波非竟争随机接入提供了支持。 附图说明
图 1为现有技术中的栽波聚合示意图;
图 2为现有技术中的非竟争随机接入流程示意图;
图 3为现有技术中 PDCCH的非跨载波调度示意图;
图 4为现有技术中 PDCCH的跨载波调度示意图;
图 5为现有技术中小区间进行 PDCCH功率协调示意图;
图 6为现有技术中存在扩展载波情况下的 PDCCH调度方式;
图 7为现有技术中的场景 1示意图;
图 8为现有技术中的场景 2示意图;
图 9为现有技术中的场景 3示意图;
图 10为本发明实施例提供的方法流程示意图;
图 11为本发明实施例提供的系统结构示意图;
图 12为本发明实施例提供的基站结构示意图;
图 13为本发明实施例提供的终端结构示意图。 具体实施方式
为了解决现有技术无法支持 PDCCH调度的跨载波非竟争随机接入的问 题, 本发明实施例提供一种栽波聚合系统中的非竟争随机接入的调度以及前 导码发送方法, 本方法中, 基站向终端发送携带上行成员载波标识信息的、 用于调度终端进行非竟争随机接入的 DCI信令, 终端则在该 DCI信令所指示 的上行成员载波上发送 preamble序列。
参见图 10, 本发明实施例提供的载波聚合系统中的非竟争随机接入的调 度以及前导码发送方法, 具体包括以下步骤: 步骤 10: 基站在用于调度终端进行非竟争随机接入的 DCI信令中添加上 行成员栽波标识信息;
步骤 11 :基站通过 PDCCH向终端发送携带上行成员载波标识信息的 DCI 送 preamble序歹1 J;
步骤 12: 终端对 PDCCH进行盲检测, 并确定检测到携带有上行成员载 波标识信息的、 用于调度本终端进行非竟争随机接入的 DCI信令;
步骤 13: 终端在检测到的 DCI信令中携带的上行成员栽波标识信息对应 的上行成员载波上向网络侧发送 preamble序列。
在基站侧:
步骤 10的实现可以采用以下两种方法:
第一种: 基站在用于调度终端进行非竟争随机接入的 DCI信令中增加设 置载波编号指示(CIF )域, 将上行成员栽波标识信息添加在该 CIF域中。
具体的, 基站可以在用于调度终端进行非竟争随机接入的 DCI信令的任 何固定位置增加设置 CIF域, 较佳的, 可以在 DCI信令的头部或尾部增加设 置 CIF域。
相应的, 步骤 11中, 基站可以在终端专属搜索空间内, 向终端发送携带 上行成员载波标识信息的 DCI信令。
第二种,基站将 DCI信令中空闲比特中的一部分作为 CIF域,使用该 CIF 域承载上行成员栽波标识信息, 即将下行成员载波标识信息添加在该 CIF域 中。
在将上行成员载波标识信息添加在 CIF域中之后, 基站还可以判断 DCI 信令中是否还存在剩余的空闲比特,若是,则将剩余的空闲比特全部设置为 0。
相应的, 步骤 11中, 基站可以在公共搜索空间或终端专属搜索空间内, 向终端发送所述 DCI信令。
在终端侧:
对应于上述第一种方法, 步骤 12中, 终端检测到的 DCI信令为设置有携 带上行成员载波标识信息的 CIF 区域、 并且用于调度本终端进行非竟争随机 接入的 DCI信令。 终端可以是在终端专属搜索空间内, 检测到该 DCI信令。
对应于上述第二种方法, 步骤 12中, 终端检测到的 DCI信令为空闲域中 携带有上行成员载波标识信息、 并且用于调度本终端进行非竟争随机接入的 DCI信令。 终端可以在终端专属搜索空间或公共搜索空间内, 检测到该 DCI 信令。
本发明中, DCI信令携带的上行成员栽波标识信息可以占用 3 比特, 该 DCI信令具体可以是格式为 DCI formatlA的信令。
下面结合实施例对本发明进行说明:
实施例一:
本实施例中, 在使用 C-RNTI加扰的用于调度非竟争随机接入的、 具有 DCI format 1A的 DCI信令的固定比特位置设置 CIF域(占用 3bits ), 为了设 计简单, CIF域可以放置在 DCI信令的头部或尾部。以下以 CIF域放置在 DCI 信令的头部为例进行说明:
步骤 S01 : 基站根据当前的业务需求, 使用下行载波的 PDCCH向 UE发 送携带 CIF域的 DCI信令, 该 DCI信令的格式如下所示:
CIF 域, 占用 3bits, 携带上行成员载波标识信息;
格式 0和格式 1的区分标志域( Flag for formatO/formatlA differentiation ), 占用 1 bit,例如取值为 0时表示格式 0,取值为 1时表示格式 1。 与普通 DCI format 1Λ相同;
本地 /分布式 VRB 分配标志域 ( Localized/Distributed VRB assignment flag ), 占用 1 bit,取值为 0。 由于调度非竟争随机接入不需要使用该信息域, 故置为 0; 资源块分配域(Resource block assignment ), 占用 「1(^2(^^(^^ +1)/2)"]比 特, 所有比特均置为 1 , 其中区 11为系统带宽, 以物理资源块(PRB )为单位; 前导码标识 i或 ( preamble Index ), 占用 6比特, 为随机接入 preamble序 号;
PRACH掩码标识域(Mask Index ), 占用 4比特, 指示随机接入所使用 的 PRACH信道序号;
其他所有比特域(即空闲域), 全置为 0。
步骤 S02: 配置为跨载波调度模式的 UE在 PDCCH上检测到具有上述格 式的 DCI信令后, 确定该 DCI信令为用于调度非竟争随机接入的 DCI信令, 在该 DCI信令的 CIF 域携带的上行成员栽波标识对应的上行成员载波上, 利 用该 DCI信令的资源块分配域所指示的时频资源, 向基站发送该 DCI信令的 前导码标识域所指示的 preamble序列;
步骤 S03:基站接收到 UE发来的 preamble序列后,在下行载波发送随机 接入响应。 进行后续的信令交互和数据传输。
由于本实施例实际改变了 LTE R8原有的 DCI format lA的信息长度, 且 DCI format 1A在公共搜索空间内还用于调度系统信息、 寻呼信息、 随机接入 响应信息等 LTE R8与 LTE-A用户公用的信息。为了不影响1 LTE R8用户的盲 检测, 基于本实施例生^的 DCI信令可以放置在 UE的专属搜索空间。
实施例二:
本实施例中, 将现有 LTE R8 中用于调度非竟争随机接入的格式为 DCI format 1A的 DCI信令中的空闲比特中的 3bits作为 CIF域。 具体如下:
步骤 S11: 基站根据当前的业务需求, 使用下行载波的 PDCCH向 UE发 送携带 CIF域的 DCI信令, 该 DCI信令的格式如下所示:
格式 0和格式 1的区分标志域( Flag for formatO/formatlA differentiation ), 占用 1 bit, 例如取值为 0时表示格式 0,取值为 1时表示格式 1。 与普通 DCI format 1A相同;
本地 /分布式 VRB 分配标志域 ( Localized/Distributed VRB assignment Hag ), 占用 1 bit,取值为 0。 由于调度非竟争随机接入不需要使用该信息域, 故置为 0; 资源块分配域(Resource block assignment ), 占用 「1(^(^^^^ +1)/2)"]比 特, 所有比特均置为 1, 其中 为系统带宽, 以物理资源块(PRB )为单位; 前导码标识域(preamble Index ), 占用 6比特, 为随机接入 preamble序 ;
PRACH掩码标识域(Mask Index ), 占用 4比特, 指示随机接入所使用 的 PRACH信道序号;
CIF域, 占用 3bits, 携带上行成员载波标识信息;
如果还有空闲的信息比特则将其全置为 0 ( FDD情况下没有空闲比特, TDD情况下有空闲的 3bit )。
步骤 S12: 配置为跨栽波调度模式的 UE在 PDCCH上检测到具有上述格 式的 DCI信令后, 确定该 DCI信令为用于调度非竟争随机接入的 DCI信令, 在该 DCI信令的 CIF 域携带的上行成员栽波标识对应的上行成员载波上, 利 用该 DCI信令的资源块分配域所指示的时频资源, 向基站发送该 DCI信令的 前导码标识域所指示的 preamble序列;
步骤 S13:基站接收到 UE发来的 preamble序列后,在下行载波发送随机 接入响应。 进行后续的信令交互和数据传输。
由于本实施例未改变 LTE R8中定义的 DCI format 1A的比特长度, 不对 公共搜索空间内 LTE R8用户盲检造成影响,基于本实施例生成的 DCI信令可 以放置在公共搜索空间内。
实施例一和实施例二可以单独使用, 也可以结合使用, 即配置为跨载波 调度模式的 LTE-A UE在公共搜索空间内盲检到基于实施例二生成的 DCI format 1A, 则认为是用于调度非竟争随机接入的 DCI, 并按照 CIF域的指示 在特定的 UL CC上发送 preamble; 若配置为跨载波调度模式的 LTE-A UE在 UK专属搜索空间内盲检到基于方法一生成的 DCI format 1A, 则认为是调度 非竟争随机接入的 DCI, 并按照 CIF 域的指示在特定的 UL CC 上发送 preamble 参见图 11, 本发明实施例还提供一种无线通信系统, 该系统包括: 基站 21, 用于在用于调度本终端进行非竟争随机接入的下行控制指示 DCI信令中添加上行成员载波标识信息;通过物理下行控制信道 PDCCH向终 端发送所述 DCI信令;
终端 22, 用于对 PDCCH进行盲检测; 确定检测到携带有上行成员载波 标识信息的、 用于调度本终端进行非竟争随机接入的 DCI信令; 在所述上行 成员载波标识对应的上行成员栽波上向网络侧发送前导码 preamble序列。
所述基站 21用于:
在用于调度本终端进行非竟争随机接入的 DCI信令的固定位置增加设置 CI1<域, 将所述上行成员载波标识信息添加在所述 CIF域中;
相应的, 所述终端 22用于:
在 PDCCH检测设置有携带上行成员栽波标识信息的 CIF区域、并且用于 调度本终端进行非竟争随机接入的 DCI信令。 具体可以在 ^端专属搜索空间 内检测该 DCI信令。 '
所述基站 21用于:
将 DCI信令中空闲比特中的一部分作为 CIF域, 使用该 CIF域承载上行 成员载波标识信息;
相应的, 所述终端 22用于:
在 PDCCH检测空闲域中携带有上行成员栽波标识信息、并且用于调度本 终端进行非竟争随机接入的 DCI信令。 具体可以在公共搜索空间或终端专属 搜索空间内检测该 DCI信令。
参见图 12, 本发明实施例还提供一种基站, 可以应用于无线通信系统中, 该基站包括:
载波信息添加单元 30, 用于在用于调度本终端进行非竟争随机接入的下 行控制指示 DCI信令中添加上行成员载波标识信息;
DCI信令发送单元 31, 用于通过 PDCCH向终端发送所述 DCI信令, 以 指示终端在所述上行成员载波标 码 preamble序歹l。
所述载波信息添加单元 30包括:
域设置单元, 用于在用于调度本终端进行非竟争随机接入的 DCI信令的 固定位置增加设置 CIF域;
标识添加单元, 用于将所述上行成员栽波标识信息添加在所述 CIF域中。 所述域设置单元用于:
在用于调度本终端进行非竟争随机接入的 DCI信令的头部或尾部, 增加 设置 CIF域。
所述 DCI信令发送单元 31用于:
在终端专属搜索空间内, 向终端发送所述 DCI信令。
所述载波信息添加单元 30用于:
将 DCI信令中空闲比特中的一部分作为 CIF域, 使用该 CIF域承栽上行 成员载波标识信息。 1
所述信息添加单元还用于:
确定所述 DCI信令中是否还存在空闲比特, 若是, 则将所述空闲比特设 置为 0。
所述 DCI信令发送单元 31用于:
在公共搜索空间 A终端专属搜索空间内, 向终端发送所述 DCI信令。 参见图 13, 本发明实施例还提供一种终端, 该终端包括:
盲检测单元 40, 用于对物理下行控制信道 PDCCH进行盲检测, 并确定 检测到携带有上行成员载波标识信息的、 用于调度本终端进行非竟争随机接 入的 DCI信令;
序列发送单元 41 , 用于终端在所述上行成员栽波标识对应的上行成员栽 波上向网络侧发送前导码 preamble序列。
所述盲检测单元 40包括第一检测单元和 /或第二检测单元, 其中: 所述第一检测单元, 用于检测设置有携带上行成员栽波标识信息的 CIF 区域、 并且用于调度本终端进行非竟争随机接入的 DCI信令; 所述第二检测单元, 用于检测空闲域中携带有上行成员栽波标识信息、 并且用于调度本终端进行非竟争随机接入的 DCI信令。
所述第一检测单元用于:
在终端专属搜索空间内, 检测设置有所述 CIF 区域、 并且用于调度本终 端进行非竟争随机接入的 DCI信令。
所述第二检测单元用于: 在公共搜索空间或终端专属搜索空间内, 检测 空闲域中携带有上行成员栽波标识信息、 并且用于调度本终端进行非竟争随 机接入的 DCI信令。
综上, 本发明的有益效果包括:
本发明实施例提供的方案中, 基站在用于调度终端进行非竟争随机接入 的 DCI信令中添加上行成员栽波标识信息,并通过 PDCCH向终端发送该 DCI 信令, 终端对 PDCCH进行盲检测, 在检测到该 DCI信令时, 在该 DCI信令 所指示的上行成员载波上向网络侧发送 preamble序列。 可见, 本发明中通过 在用于调度终端进行非竟争随机接入的 DCI信令中添加上行成员载波标识信 息, 使得终端能够在检测到该 DCI后, 根据该 DCI确定发送 preamble序列所 使用的上行成员栽波, 进而在该上行成员栽波上发送 preamble序列, 从而为 实现 PDCCH调度的跨载波非竟争随机接入提供了支持。
本领域内的技术人员应明白, 本发明的实施例可提供为方法、 系统、 或 计算机程序产品。 因此, 本发明可采用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实施例的形式。 而且, 本发明可采用在一个或多个 其中包含有计算机可用程序代码的计算机可用存储介质 (包括但不限于磁盘 存储器和光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、 设备(系统)、 和计算机程序产 品的流程图和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图 和 /或方框图中的每一流程和 /或方框、 以及流程图和 /或方框图中的流程 和 /或方框的结合。 可提供这些计算机程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器, 使得通 过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流 程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设 备以特定方式工作的计算机可读存储器中, 使得存储在该计算机可读存储器 中的指令产生包括指令装置的制造品, 该指令装置实现在流程图一个流程或 多个流程和 /或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的 处理, 从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图 一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的步 骤。 发明的精神和范围。 这样, 倘若本发明的这些修改和变型属于本发明权利要 求及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种栽波聚合系统中的非竟争随机接入的调度方法, 其特征在于, 该 方法包括:
基站在用于调度终端进行非竟争随机接入的下行控制指示 DCI信令中添 加上行成员载波标识信息;
基站通过物理下行控制信道 PDCCH向终端发送所述 DCI信令, 以指示 终端在所述上行成员栽波标识信息对应的上行成员栽波上向网络侧发送前导 码 preamble序列。
2、 如权利要求 1所述的方法, 其特征在于, 在用于调度本终端进行非竟 争随机接入的 DCI信^ ^的固定位置中设置有载波编号指示 CIF域;
所述基站在用于调度本终端进行非竟争随机接入的 DCI信令中添加上行 成员载波标识信息包括: 基站将所述上行成员载波标识信息添加在所述 CIF 域中。
3、 如权利要求 2所述的方法, 其特征在于, 所述固定位置为: DCI信令 的头部或尾部。
4、 如权利要求 2或 3所述的方法, 其特征在于, 所述基站通过 PDCCH 向终端发送所述 DCI信令包括:
所述基站在终端专属搜索空间内 , 通过 PDCCH向终端发送所述 DCI信 令。
5、 如权利要求 1所述的方法, 其特征在于, 将所述 DCI信令中空闲比特 中的一部分作为 CIF域;
所述基站在用于调度终端进行非竟争随机接入的 DCI信令中添加上行成 员载波标识信息包括: 所述基站使用该 CIF域承载上行成员载波标识信息。
6、 如权利要求 5所述的方法, 其特征在于, 在使用该 CIF域承载上行成 员载波标识信息之后, 该方法进一步包括:
确定所述 DCI信令中是否还存在剩余的空闲比特, 若是, 则将该剩余的 空闲比特设置为 0。
7、 如权利要求 5或 6所述的方法, 其特征在于, 所述基站通过 PDCCH 向终端发送所述 DCI信令包括:
所述基站在公共搜索空间或终端专属搜索空间内,通过 PDCCH向终端发 送所述 DCI信令。
8、 一种载波聚合系统中的前导码发送方法, 其特征在于, 该方法包括: 终端对物理下行控制信道 PDCCH进行盲检测;
终端确定检测到携带有上行成员载波标识信息的下行控制指示 DCI信 令; 该 DCI信令用于调度本终端进行非竟争随机接入;
终端在所述上行成员载波标识信息对应的上行成员载波上向网络侧发送 前导码 preamble序列。
9、 如权利要求 8所述的方法, 其特征在于, 所述携带有上行成员载波标 识信息的 DCI信令为:
设置有携带上行成员栽波标识信息的栽波编号指示 CIF域的 DCI信令; 或者,
空闲域中携带有上行成员载波标识信息的 DCI信令。
10、 如权利要求 9所述的方法, 其特征在于, 终端在终端专属搜索空间 内, 检测到设置有所述 CIF域的 DCI信令。
11、 如权利要求 9所述的方法, 其特征在于, 终端在公共搜索空间或终 端专属搜索空间内, 检测到空闲域中携带有上行成员栽波标识信息的 DCI信 令。
12、 一种基站, 其特征在于, 该基站包括:
载波信息添加单元, 用于在用于调度终端进行非竟争随机接入的下行控 制指示 DCI信令中添加上行成员载波标识信息;
DCI信令发送单元,用于通过物理下行控制信道 PDCCH向终端发送所述 DCI信令, 以指示终端在所述上行成员载波标识对应的上行成员载波上向网 络侧发送前导码 preamble序列。
13、 如权利要求 12所述的基站, 其特征在于, 所述载波信息添加单元包 括:
域设置单元, 用于在用于调度本终端进行非竟争随机接入的 DCI信令的 固定位置增加设置载波编号指示 CIF域;
标识添加单元, 用于将所述上行成员栽波标识信息添加在所述 CIF域中。
14、 如权利要求 13所述的基站, 其特征在于, 所述域设置单元用于: 在用于调度本终端进行非竟争随机接入的 DCI信令的头部或尾部, 增加 设置 CIF域。
15、 如权利要求 13或 14所述的基站, 其特征在于, 所述 DCI信令发送 单元用于:
在终端专属搜索空间内, 向终端发送所述 DCI信令。
16、 如权利要求 12所述的基站, 其特征在于, 所述载波信息添加单元用 于:
将 DCI信令中空闲比特中的一部分作为 CIF域, 使用该 CIF域承载上行 成员载波标识信息。
17、如权利要求 16所述的基站,其特征在于, 所述信息添加单元还用于: 确定所述 DCI信 中是否还存在剩余的空闲比特, 若是, 则将剩余的空 闲比特设置为 0。
18、 如权利要求 16或 17所述的基站, 其特征在于, 所述 DCI信令发送 单元用于:
在公共搜索空间或终端专属搜索空间内, 向终端发送所述 DCI信令。
19、 一种终端, 其特征在于, 该终端包括:
盲检测单元, 用于对物理下行控制信道 PDCCH进行盲检测, 并确定检 测到携带有上行成员载波标识信息的、 用于调度本终端进行非竟争随机接入 的下行控制指示 DCI信令;
序列发送单元, 用于终端在所述上行成员栽波标识对应的上行成员栽波 上向网络侧发送前导码 preamble序列。
20、 如权利要求 19所述的终端, 其特征在于, 所述盲检测单元包括第一 检测单元和 /或第二检测单元, 其中:
所述第一检测单元, 用于检测设置有携带上行成员载波标识信息的栽波 编号指示 CIF域、 并且用于调度本终端进行非竟争随机接入的 DCI信令; 所述第二检测单元, 用于检测空闲域中携带有上行成员栽波标识信息、 并且用于调度本终端进行非竟争随机接入的 DCI信令。
21、 如权利要求 20所述的终端, 其特征在于, 所述第一检测单元用于: 在终端专属搜索空间内, 检测设置有所述 CEF域、 并且用于调度本终端 进行非竟争随机接入的 DCI信令。
22、 如权利要求 20所述的终端, 其特征在于, 所述第二检测单元用于: 在公共搜索空间或终端专属搜索空间内, 检测空闲域中携带有上行成员 栽
波标识信息、 并且用于调度本终端进行非竟争随机接入的 DCI信令。
23、 一种无线通信系统, 其特征在于, 该系统包括:
基站, 用于在用于调度终端进行非竟争随机接入的下行控制指示 DCI信 令中添加上行成员栽波标识信息;通过物理下行控制信道 PDCCH向终端发送 所述 DCI信令
终端, 用于对 PDCCH进行盲检测; 确定检测到携带有上行成员载波标 识信息的、 用于调度本终端进行非竟争随机接入的 DCI信令; 在所述上行成 员载波标识对应的上行成员载波上向网络侧发送前导码 preamble序列。
24、 如权利要求 23所述的系统, 其特征在于, 所述基站用于: 在用于调度本终端进行非竟争随机接入的 DCI信令的固定位置增加设置 载波编号指示 CIF域, 将所述上行成员载波标识信息添加在所述 CIF域中; 所述终端用于:
检测设置有携带上行成员栽波标识信息的 CIF域、 并且用于调度本终端 进行非竟争随机接入的 DCI信令。
25、 如权利要求 23所述的系统, 其特征在于, 所述基站用于: 将 DCI信令中空闲比特中的一部分作为 CIF域, 使用该 CIF域承栽上行 成员载波标识信息;
所述终端用于:
检测空闲域中携带有上行成员载波标识信息、 并且用于调度本终端进行 非竟争随机接入的 DCI信令。
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