WO2015062090A1 - 一种随机接入方法及相关装置 - Google Patents

一种随机接入方法及相关装置 Download PDF

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Publication number
WO2015062090A1
WO2015062090A1 PCT/CN2013/086458 CN2013086458W WO2015062090A1 WO 2015062090 A1 WO2015062090 A1 WO 2015062090A1 CN 2013086458 W CN2013086458 W CN 2013086458W WO 2015062090 A1 WO2015062090 A1 WO 2015062090A1
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WO
WIPO (PCT)
Prior art keywords
user equipment
downlink
base station
uplink
random access
Prior art date
Application number
PCT/CN2013/086458
Other languages
English (en)
French (fr)
Inventor
吕永霞
权威
杨晓东
李超君
李博
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 EP13896510.8A priority Critical patent/EP3054734B1/en
Priority to CN201380001533.5A priority patent/CN105264983B/zh
Priority to EP17193779.0A priority patent/EP3331302B1/en
Priority to MX2016005476A priority patent/MX354882B/es
Priority to RU2016121512A priority patent/RU2628020C1/ru
Priority to BR112016009736-0A priority patent/BR112016009736B1/pt
Priority to PCT/CN2013/086458 priority patent/WO2015062090A1/zh
Publication of WO2015062090A1 publication Critical patent/WO2015062090A1/zh
Priority to ZA2016/02911A priority patent/ZA201602911B/en
Priority to US15/143,559 priority patent/US10159095B2/en
Priority to US16/208,106 priority patent/US10462826B2/en

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Classifications

    • 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
    • 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
    • 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
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/04Scheduled access
    • H04W74/06Scheduled access using polling
    • 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]

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a random access method and related apparatus. Background technique
  • the Long Term Evolution (LTE) system supports Time Division Duplexing (TDD), that is, Uplink (UL) and Downlink (DL) use different time slots of the same frequency.
  • TDD Time Division Duplexing
  • UL Uplink
  • DL Downlink
  • the LTE TDD system can be configured with the uplink and downlink (Uplink-Downlink Configuration) in a semi-static configuration to meet different uplink and downlink asymmetric service requirements.
  • the uplink-downlink ratio used is semi-statically configured.
  • the fastest 640 milliseconds (ms) changes the ratio. This will cause the current uplink-downlink ratio to not match the instantaneous uplink and downlink traffic, which is not effective.
  • the use of resources, especially for cells with a small number of user devices, is particularly serious. Therefore, in order to effectively improve resource utilization, in the new version of the system, the TDD uplink and downlink ratio can be dynamically changed, for example, 10ms to 40ms to change the uplink and downlink ratio, and the base station (eNodeB, eNB) passes the traditional physical downlink control channel (Physical Downlink Control).
  • the physical layer downlink control channel refers to the traditional physical downlink control channel. Or enhanced physical downlink control channel (ePDCCH), the physical layer downlink control channel can be written as (e) PDCCH. Since (e) PDCCH is relatively dynamic, thereby dynamically changing the uplink and downlink ratio of TDD .
  • the user equipment that supports the TDD uplink-downlink ratio dynamic change function is called the further enhancement of the LTE TDD for the downlink uplink interference management and service adaptation (Frther Enhancements to LTE TDD for DL-UL Interference Management and Traffic Adaptation, elMTA) user equipment. For the purpose of this article, this article is called elMTA user equipment.
  • the non-elMTA user equipment includes at least the user equipment of the previous version of the 3rd Generation Partnership Project Release 12 (3GPP R12) (User Equipment, UE) and 3GPP R12 without eMTTA function and user equipment of 3GPP R12 and later versions, when the elMTA user equipment and the non-elMTA user equipment are in the same random access channel
  • 3GPP R12 3rd Generation Partnership Project Release 12
  • UE User Equipment
  • 3GPP R12 3rd Generation Partnership Project Release 12
  • the existing protocol specifies that a random access response is received in the subframe n, and then is sent on the first uplink subframe n+kl.
  • the elMTA user equipment determines n+k1 according to the TDD uplink-downlink ratio notified in the (e)PDCCH, or determines the subframe in which the Msg3 is transmitted.
  • the non-elMTA user equipment determines n+k1 according to the TDD uplink-downlink ratio notified in system information block1 (SIB1), or determines the subframe in which Msg3 is transmitted, and (e) the TDD notified on the PDCCH.
  • SIB1 system information block1
  • the uplink-downlink ratio and the TDD uplink-downlink ratio notified in SIB1 may be different.
  • the base station Since the base station does not know whether the user equipment that sent the preamble is an elMTA user equipment or a non-elMTA user equipment before receiving the RACH Msg3 correctly, the base station also It is not known which ratio the user equipment will determine n+kl or transmit the uplink subframe of Msg3. Therefore, the non-elMTA user equipment and the eMTTA user equipment and the base station have inconsistent understandings of the uplink subframe for transmitting the Msg3, and then the base station may not receive the corresponding Msg3.
  • the embodiment of the present invention provides a random access method and related device, which can enable a base station to accurately receive a random access message 3 sent by a non-elMTA user equipment and an elMTA user equipment.
  • a random access method including:
  • the first signaling includes a first time division duplex TDD uplink and downlink ratio
  • the second signaling includes a second TDD uplink and downlink ratio
  • the elMTA user equipment is configured according to the first TDD uplink and downlink ratio Determining an uplink subframe in which the random access message 3 is sent; The elMTA user equipment sends the random access message 3 to the base station in the determined uplink subframe.
  • the method before the sending, by the elMTA user equipment, the random access message 3 to the base station, in the determined uplink subframe, the method further includes:
  • the elMTA user equipment sends a pilot preamble to the base station on the uplink subframe set in the first TDD uplink and downlink ratio.
  • the eMTTA user equipment sends a pilot preamble to an uplink subframe set in the first TDD uplink-downlink ratio Before the base station, the method further includes:
  • the elMTA user equipment monitors a physical downlink control channel command PDCCH Order or an enhanced physical downlink control channel command ePDCCH Order sent by the base station; or
  • the elMTA user equipment monitors the PDCCH Order or ePDCCH Order sent by the base station.
  • the eMTTA user equipment is in the determined uplink Before the sending the random access message 3 to the base station in a subframe, the method further includes:
  • the eMTTA user equipment listens to the radio network temporary identifier RA-RNTI that is sent by the base station through the PDCCH or the ePDCCH, and adds 4 Downstream control information DCI.
  • the method further includes:
  • the elMTA user equipment receives the contention resolution message sent by the base station on the downlink subframe set in the second TDD uplink and downlink ratio;
  • the elMTA user equipment receives the contention resolution message sent by the base station on the downlink subframe set in the uplink and downlink ratio of the first TDD.
  • the first signaling is system information block 1 .
  • a random access method including:
  • the first signaling includes a time division duplex TDD uplink and downlink ratio
  • the second signaling includes a second TDD uplink and downlink ratio
  • the method before the receiving the random access message 3 sent by the eMTTA user equipment according to the uplink subframe determined by the first TDD uplink and downlink ratio, the method further includes:
  • the receiving the eMTTA user equipment After the random access message 3 sent in the first uplink subframe determined by the first TDD uplink and downlink ratio, the method further includes:
  • an elMTA user equipment including:
  • a receiving unit configured to receive first signaling that is sent by the base station to the eMTTA user equipment by using the physical downlink shared channel PDSCH, and send the base station to the eMTTA user equipment by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel (ePDCCH)
  • the second signaling, the first signaling includes a first time division duplex TDD uplink and downlink ratio, and the second signaling includes a second TDD uplink and downlink ratio;
  • a determining unit configured to determine, according to the first TDD uplink-downlink ratio, an uplink subframe that sends the random access message 3;
  • a sending unit configured to send the random access message 3 to the base station on the determined uplink subframe.
  • the sending unit is further configured to send a pilot preamble to the base station in an uplink subframe set in the first TDD uplink and downlink ratio.
  • the receiving unit is further configured to: on a downlink subframe set in the second TDD uplink and downlink ratio, the monitoring station a physical downlink control channel command PDCCH Order or an enhanced physical downlink control channel command ePDCCH Order sent by the base station; or
  • the receiving unit is further configured to monitor, on the downlink subframe set in the first TDD uplink and downlink ratio, the PDCCH Order or ePDCCH Order sent by the base station.
  • the receiving unit is further configured to be used in the foregoing On the downlink subframe set in the TDD uplink-downlink ratio, the downlink control information DCI scrambled by the base station through the PDCCH or the ePDCCH and using the random access radio network temporary identifier RA-RNTI is monitored.
  • the receiving unit is further configured to use, in the second TDD, the downlink subframe set in the uplink and downlink ratio Receiving a contention resolution message sent by the base station; or
  • the receiving unit is further configured to receive, on the downlink subframe set in the uplink and downlink ratio of the first TDD, the contention resolution message sent by the base station.
  • the first signaling is system information block 1.
  • a base station including:
  • a sending unit configured to send the first signaling to the elMTA user equipment by using the physical shared channel PDSCH, and send the second signaling to the elMTA user equipment by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel ePDCCH, where
  • the first signaling includes a first time division duplex TDD uplink and downlink ratio
  • the second signaling includes a second TDD uplink and downlink ratio
  • the receiving unit is configured to receive the random access message 3 sent by the elMTA user equipment on the uplink subframe determined according to the first TDD uplink and downlink ratio.
  • the sending unit is further configured to send, by using the downlink downlink subframe set in the second TDD uplink and downlink ratio, a physical downlink control channel command PDCCH Order to the elMTA user equipment or Enhanced physical downlink control channel command ePDCCH Order; or,
  • the sending unit is further configured to send the PDCCH Order or ePDCCH Order to the enabled elMTA user equipment on the downlink subframe set in the first TDD uplink and downlink ratio.
  • the sending unit is further configured to use, in the first TDD, the downlink subframe set in the uplink and downlink ratio And transmitting, by using the PDCCH or the ePDCCH, the downlink control information DCI that is scrambled by the radio network temporary identifier RA-RNTI of the random access to the eMTTA user equipment.
  • the sending unit is further configured to be used in the foregoing Sending a contention resolution message to the user equipment that enables the eLMTA function on the downlink subframe set in the TDD uplink-downlink ratio;
  • the sending unit is further configured to: on the downlink subframe set in the uplink and downlink ratio of the first TDD, Sending the contention resolution message to the user equipment that enables the eLMTA function.
  • the first signaling is system information block 1.
  • an elMTA user equipment is provided, including
  • a receiver configured to receive first signaling that is sent by the base station to the eMTTA user equipment by using the physical downlink shared channel PDSCH, and send the base station to the eMTTA user equipment by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel (ePDCCH)
  • the second signaling where the first signaling includes a first time division duplex TDD uplink and downlink ratio
  • a processor configured to determine, according to the first TDD uplink-downlink ratio, an uplink subframe that sends a random access message 3;
  • a transmitter configured to send the random access message to the base station on the determined uplink subframe
  • the transmitter before the sending, by the transmitter, the step of sending the random access message 3 to the base station in the determined uplink subframe, the transmitter is further configured to perform the following steps. :
  • the sending by the sending, the transmitting the pilot on the uplink subframe set in the first TDD uplink and downlink ratio Before the step of preamble to the base station, the receiver is further configured to perform the following steps:
  • the transmitter performs the determining The receiver before the step of transmitting the random access message 3 to the base station on an uplink subframe Also used to perform the following steps:
  • the downlink control information DCI that is scrambled by the radio network temporary identifier RA-RNTI that is sent by the base station by using the PDCCH or the ePDCCH.
  • the receiver is further configured to perform the following steps:
  • a base station including:
  • a transmitter configured to send, by using a physical shared channel, the PDSCH, the first signaling to the elMTA user equipment, and send, by using the physical downlink control channel PDCCH or the enhanced physical downlink control channel ePDCCH, the second signaling to the elMTA user equipment, where
  • the signaling includes a first time division duplex TDD uplink and downlink ratio, and the second signaling includes a second TDD uplink and downlink ratio;
  • a receiver configured to receive the random access message 3 sent by the elMTA user equipment on an uplink subframe determined according to the first TDD uplink-downlink ratio.
  • the receiver performs the step of receiving the random access message 3 sent by the eMTTA user equipment on an uplink subframe determined according to the first TDD uplink-downlink ratio.
  • the transmitter is further configured to perform the following steps:
  • the PDCCH Order or ePDCCH Order is sent.
  • the receiving performing the receiving the eMTTA user equipment is based on the first TDD uplink and downlink ratio
  • the transmitter is further configured to perform the following steps:
  • the receiver performs the receiving the eMTTA After the step of the random access message 3 sent by the user equipment on the first uplink subframe determined according to the first TDD uplink-downlink ratio, the transmitter is further configured to perform the following steps:
  • the first signaling is system information block 1.
  • the non-elMTA user equipment and the elMTA user equipment are received by using the signaling method of the physical downlink shared channel by using the non-elMTA user equipment and the elMTA user equipment. Random access message 3 sent. DRAWINGS
  • Figure lb is a flow chart of a random access procedure in a non-contention mode
  • FIG. 2 is a flowchart of a first embodiment of a random access method according to the present invention
  • FIG. 3 is a flowchart of a second embodiment of a random access method according to the present invention.
  • FIG. 4 is a flowchart of a third embodiment of a random access method according to the present invention.
  • FIG. 5 is a flowchart of a fourth embodiment of a random access method according to the present invention.
  • FIG. 6 is a flowchart of a fifth embodiment of a random access method according to the present invention.
  • FIG. 7 is a flowchart of a sixth embodiment of a random access method according to the present invention.
  • FIG. 8 is a flowchart of a seventh embodiment of a random access method according to the present invention.
  • FIG. 9 is a flowchart of an eighth embodiment of a random access method according to the present invention.
  • FIG. 10 is a schematic structural diagram of a first embodiment of a user equipment according to the present invention.
  • FIG. 11 is a schematic structural diagram of a second embodiment of a user equipment according to the present invention.
  • FIG. 12 is a schematic structural diagram of a third embodiment of a user equipment according to the present invention.
  • FIG. 13 is a schematic structural diagram of a fourth embodiment of a user equipment according to the present invention.
  • FIG. 14 is a schematic structural diagram of a first embodiment of a base station according to the present invention.
  • FIG. 15 is a schematic structural diagram of a second embodiment of a base station according to the present invention.
  • FIG. 16 is a schematic structural diagram of a third embodiment of a base station according to the present invention.
  • FIG. 17 is a schematic structural diagram of a fourth embodiment of a base station according to the present invention.
  • FIG. 18 is a schematic structural diagram of a fifth embodiment of a user equipment according to the present invention.
  • FIG. 19 is a schematic structural diagram of an embodiment of a base station device according to the present invention. detailed description
  • the random access procedure of the LTE TDD system includes a stochastic process of a competitive mode and a random process of a non-competitive mode.
  • the random access process of the competitive mode is as shown in FIG. 1a, and the schematic diagram of the random access process of the non-competitive mode is shown in FIG. Lb shows.
  • the contention random access procedure includes that the UE sends a random access message 1 (which can be written as Msgl), that is, a preamble. After the eNodeB correctly receives the preamble, it sends a random access message 2 (which can be written as Msg2), that is, a random access response (RAR), and the random access response includes: time advance, random access.
  • a random access response grant (indicating the transmission information of the subsequent Msg3), the assigned temporary user identifier (temporary C-RNTI).
  • the UE After the UE correctly receives the Msg2, the UE sends the Msg3 on the Physical Uplink Share Channel (PUSCH) indicated by the random access response authorization in the Msg2.
  • the Msg3 is an RRC connection request.
  • the random access procedure message 3 initiated after the radio link fails may be an RRC connection reestablishment request, or may be a medium access control control element (MAC CE)
  • the eNB may return a random access message 4 (memory Msg4) on the physical downlink shared channel (Physical Downlink Share Channel, PDSCH) after receiving the Msg3 correctly, and the access message 4 may be Conflict detection messages, etc.
  • the non-contention random access process does not have a message 3 and a contention resolution message.
  • the non-contention random access process includes Random access message 0 (Msg0), Msg0 may be a downlink control channel command ((e) PDCCH order), or may be a handover command, and the (e) PDCCH order includes a preamble sequence ⁇ 1 J number and the like.
  • Msg0 may be a downlink control channel command ((e) PDCCH order), or may be a handover command
  • the (e) PDCCH order includes a preamble sequence ⁇ 1 J number and the like.
  • Step S101 The elMTA user equipment receives the first signaling that is sent by the base station to the eMTTA user equipment by using the physical downlink shared channel (PDSCH), and sends the base station to the eMTTA user by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel ePDCCH.
  • the second signaling of the device where the first signaling includes a first time division duplex TDD uplink and downlink ratio, and the second signaling includes a second TDD uplink and downlink ratio.
  • the first signaling sent by the base station may be received through the PDSCH, and the first signaling may be SIB1.
  • the first TDD uplink and downlink ratio is included in the first signaling, and the first TDD uplink and downlink ratio is semi-statically configured.
  • the second signaling sent by the base station can also be received through the (e)PDCCH.
  • the second TDD uplink and downlink ratio is included in the second signaling, and the second TDD uplink and downlink ratio can be dynamically changed, for example, 10ms to 40ms to change the uplink and downlink ratio.
  • the subframe type and ratio rule included in the first TDD uplink-downlink ratio and the second TDD uplink-downlink ratio are still the uplink-downlink ratios as shown in Table 1.
  • Step S102 The elMTA user equipment determines to send an uplink subframe of the random access message 3 according to the first TDD uplink-downlink ratio.
  • Msg3 is sent according to the first TDD uplink and downlink ratio.
  • the elMTA user does not determine n+kl according to the TDD uplink-downlink ratio notified in the (e)PDCCH, or determines the subframe in which the Msg3 is transmitted, but determines the n+kl according to the TDD ratio notified in the SIB1. Or to determine the subframe to send Msg3.
  • Step S103 The elMTA user equipment sends the random access message 3 to the base station in the determined uplink subframe.
  • the elMTA user equipment sends Msg3 to the base station on the determined uplink subframe.
  • the base station can know that the non-elMTA user equipment and the eMTTA user equipment uniformly use the uplink subframe determined according to the uplink and downlink ratio notified by the SIB1 to send the Msg3, so that the base station can accurately receive the non-elMTA user.
  • the device and the Msg3 sent by the elMTA user device maintain the R12 Backward compatibility of non-elMTA user devices prior to release.
  • the non-elMTA user equipment and the eMTTA user equipment are uniformly used to transmit the random uplink subframe determined by the uplink and downlink ratios included in the signaling sent by the physical downlink shared channel.
  • the message 3 is accessed so that the base station can accurately receive the random access message 3 sent by the non-elMTA user equipment and the elMTA user equipment.
  • FIG. 3 is a flow chart of a second embodiment of a random access method according to the present invention. As shown in Figure 3, the method includes the following steps:
  • Step S201 The elMTA user equipment receives the first signaling that is sent by the base station to the eMTTA user equipment by using the physical downlink shared channel PDSCH, and sends the base station to the eMTTA user by using the physical downlink control channel PDCCH or the enhanced physical downlink control channel ePDCCH.
  • the second signaling of the device where the first signaling includes a first time division duplex TDD uplink and downlink ratio, and the second signaling includes a second TDD uplink and downlink ratio.
  • Step S202 On the downlink subframe set in the second TDD uplink and downlink ratio, the elMTA user equipment listens to the physical downlink control channel command PDCCH Order or the enhanced physical downlink control channel command ePDCCH Order sent by the base station.
  • the UE may listen to (e) the PDCCH Order according to the TDD uplink-downlink ratio notified in the signaling sent by the (e) PDCCH, specifically, the downlink sub-frame in the TDD ratio of the signaling notified by the (e) PDCCH.
  • a frame or special subframe is used to listen to (e) PDCCH order.
  • the UE since the downlink subframes available in the TDD ratio notified in the signaling sent by the (e) PDCCH are more than the downlink subframes available in the TDD ratio notified in the SIB 1, the UE can have more opportunities to receive.
  • (e) PDCCH Order which reduces random access delay and improves base station scheduling flexibility.
  • the UE may also monitor the (e)PDCCH order sent by the base station according to the TDD ratio notified in the message sent through the PDSCH, and the message may be SIBL.
  • the downlink subframe set may include a special subframe.
  • the UE may receive other downlink data according to the downlink subframe type. This case is adapted to the other messages transmitted by the base station listening to the special subframe as described below.
  • the base station Since (e) the PDCCH order is sent by the base station to the UE in the connected state, it is triggered to perform random access, Therefore, the base station generally knows whether the UE is an eMTTA user, and whether the (TD) uplink and downlink ratios notified in the signaling sent by the PDCCH are used when the UE is an eMTTA user.
  • Step S203 The elMTA user equipment sends a pilot preamble to the base station on the uplink subframe set in the first TDD uplink-downlink ratio.
  • the base station does not know that the preamble is a non-elMTA user equipment or an elMTA user equipment, and the preamble is transmitted by using the uplink subframe in the TDD uplink and downlink ratio notified by the SIB1 to ensure that the base station accurately receives the preamble sent by the user equipment.
  • the (e)PDCCH order carries the preamble sequence number.
  • the existing protocol specifies that: the user receives the (e)PDCCH order in the subframe n, then the n+k2 subframe.
  • step S202 is not necessarily performed before step S203 is performed, and the random access procedure may also be triggered by the user equipment itself.
  • the preamble or the physical random access channel (PRACH) resource used may be a preamble or a PRACH resource that can be used by the UE in the prior art.
  • the base station only It is not clear whether the UE is an eMTTA UE through the PRACH resource, and whether the UE performing the contention random access procedure is an eIMTA UE can be distinguished only by the preamble.
  • the transmitted preamble or the used PRACH resource may be a preamble or PRACH resource that the eMTTA UE can use, and the base station can perform the contention random access process only by using the PRACH resource or the preamble. Whether the UE is an elMTA UE.
  • the elMTA UE may use a preamble or a PRACH resource that cannot be used by other UEs, or may be a new preamble or PRACH resource, or reserve a part of the preamble in the original preamble set.
  • the specific method may pass the system before step 203.
  • the broadcast message, dedicated RRC message or physical layer signaling, MAC layer signaling, etc. are configured to the elMTA UE.
  • the advantage of this is that the base station can identify the elMTA UE earlier, thereby reducing the random access delay and improving the scheduling flexibility of the base station.
  • Step S204 On the downlink subframe set in the uplink and downlink ratio of the first TDD, the elMTA user equipment listens to the radio network temporary identifier RA-RNTI that uses the random access and is sent by the base station by using the PDCCH or the ePDCCH.
  • the downlink subframe or special subframe corresponding to the TDD ratio of the SIB1 notification monitors the DCI scrambled by the RA-RNTI to ensure that all UEs can receive correctly.
  • the eMTTA UE can use the preamble or PRACH resource that cannot be used by other UEs.
  • the base station can know whether the UE is It is the elMTA UE, and whether the TDD uplink and downlink ratio notified in the signaling sent by the (e)PDCCH is adopted when the UE is the elMTA user.
  • the elMTA UE may use the preamble or PRACH resource that other UEs cannot use, and step S204 may be replaced with the second TDD.
  • the downlink control information DCI scrambled by the base station through the (e)PDCCH and using the random access radio network temporary identifier RA-RNTI is monitored.
  • the UE may have more opportunities because the downlink subframes available in the TDD uplink-downlink ratio notified in the signaling sent by the (e)PDCCH are more than the downlink subframes available in the TDD ratio notified in the SIB.
  • the eMTTA UE may use the preamble or the PRACH resource that cannot be used by other UEs, and may also receive the DCI according to the original step S204. .
  • steps S205 to S207 do not exist.
  • Step S205 The elMTA user equipment determines to send an uplink subframe of the random access message 3 according to the first TDD uplink-downlink ratio.
  • Step S206 The elMTA user equipment sends the random access message 3 to the base station in the determined uplink subframe.
  • step S205 and step S206 are the same as that of step S102 and step S103 of the foregoing embodiment, and details are not described herein again.
  • Step S207 The elMTA user equipment receives the contention resolution message sent by the base station on the downlink subframe set in the second TDD uplink and downlink ratio.
  • the base station After the base station receives the random access message 3 sent by the UE, it has already identified whether the UE is an elMTA user equipment or a non-elMTA user equipment, and whether the notification in the signaling sent by the (e)PDCCH is used when the UE is an eMTTA user. TDD uplink and downlink ratio, so it is preferred that the UE is based on (e) The TDD uplink and downlink ratio notified in the signaling sent by the PDCCH is used to monitor the contention resolution message.
  • the UE may have more opportunities. To receive the contention resolution message, reduce the random access delay, and improve the scheduling flexibility of the base station.
  • the UE may also perform the random access method according to the embodiment of the present invention by using the TDD uplink-downlink ratio notified by the SIB1, and the non-elMTA user equipment and the elMTA user equipment are uniformly used by the physics.
  • the uplink subframe determined by the uplink and downlink ratios included in the signaling sent by the downlink shared channel receives and sends each message in the random access procedure, so that the base station can accurately receive the random transmission by the non-elMTA user equipment and the elMTA user equipment.
  • the access message also reduces the power overhead and uplink interference caused by the eMTTA user equipment to determine the random access message 3 transmission time and the random access message 3 according to the second TDD uplink-downlink ratio; and can reduce the random access time. Delay, improve base station scheduling flexibility.
  • FIG. 4 is a flow chart of a third embodiment of a random access method according to the present invention. As shown in Figure 4, the method includes the following steps:
  • Step S301 Send the first signaling to the elMTA user equipment by using the physical shared channel PDSCH, and send the second signaling to the elMTA user equipment by using the physical downlink control channel PDCCH or the enhanced physical downlink control channel ePDCCH, where the first signaling
  • the first time division duplex TDD uplink and downlink ratio is included, and the second signaling includes a second TDD uplink and downlink ratio.
  • the base station Before the base station correctly receives the random access message 3, the base station does not know that each message before the random access message 3 is sent is an eMTTA user equipment or a non-elMTA user equipment, but the base station can send the first message to the elMTA user equipment and the non-elMTA user equipment through the PDSCH.
  • the first signaling may be that the SIBL includes a first TDD uplink and downlink ratio in the first signaling, and the first TDD uplink and downlink ratio is semi-statically configured.
  • the second signaling sent by the base station can also be received through the (e)PDCCH. Therefore, the base station sends the second signaling to the elMTA user equipment through the (e)PDCCH.
  • the second TDD uplink and downlink ratio is included in the second signaling, and the second TDD uplink and downlink ratio can be dynamically changed, for example, 10ms to 40ms to change the uplink and downlink ratio.
  • Step S302 Receive a random access message 3 sent by the eMTTA user equipment on an uplink subframe determined according to the first TDD uplink-downlink ratio.
  • Msg3 is sent according to the first TDD uplink and downlink ratio.
  • the elMTA user does not determine the subframe in which the Msg3 is transmitted according to the TDD uplink-downlink ratio notified in the (e) PDCCH, but determines the subframe in which the Msg3 is transmitted according to the TDD ratio notified in the SIB1. Therefore, for the non-elMTA user equipment or the elMTA user equipment, the base station can accurately receive the Msg3 they send on the uplink subframe determined according to the first TDD uplink-downlink ratio.
  • the base station knows that the non-elMTA user equipment and the elMTA user equipment uniformly use the uplink subframe determined according to the uplink and downlink ratio notified by the SIB1 to transmit the Msg3, so that the base station can accurately receive the non-elMTA user.
  • Msg3 sent by the device and the elMTA user device maintains backward compatibility of non-elMTA user devices before the R12 version.
  • the non-elMTA user equipment and the eMTTA user equipment are uniformly used to transmit the random uplink subframe determined by the uplink and downlink ratios included in the signaling sent by the physical downlink shared channel.
  • the message 3 is accessed so that the base station can accurately receive the random access message 3 sent by the non-elMTA user equipment and the elMTA user equipment.
  • FIG. 5 is a flowchart of a fourth embodiment of a random access method according to the present invention. As shown in Figure 5, the method includes the following steps:
  • Step S401 Send the first signaling to the elMTA user equipment by using the physical shared channel PDSCH, and send the second signaling to the elMTA user equipment by using the physical downlink control channel PDCCH or the enhanced physical downlink control channel ePDCCH, where the first signaling
  • the first time division duplex TDD uplink and downlink ratio is included, and the second signaling includes a second TDD uplink and downlink ratio.
  • Step S402 Send, on the downlink subframe set in the uplink and downlink ratio of the second TDD, a physical downlink control channel command PDCCH Order or an enhanced physical downlink control channel command ePDCCH Order to the elMTA user equipment.
  • the base station sends (e) the PDCCH Order to the elMTA user equipment on the downlink subframe set in the second TDD uplink-downlink ratio, such that the downlink subframe that is available in the TDD ratio notified in the signaling sent by the (e) PDCCH More downlink sub-frames are available in the TDD ratio notified in SIB 1, which allows the UE to have more opportunities to receive (e) PDCCH Order, reduce random access delay, and improve base station scheduling flexibility.
  • the base station may also be used on the downlink subframe set of the first TDD uplink and downlink ratio to the elMTA.
  • the user equipment sends (e) the PDCCH Order.
  • the downlink subframe set may include a special subframe.
  • the base station sends the (e)PDCCH Order to the elMTA user equipment on the downlink subframe set in the uplink and downlink ratio of the second TDD
  • the corresponding subframe type that can be indicated in the TDD uplink and downlink ratio is a downlink subframe
  • the UE Other downlink data may be received according to the downlink subframe type. This case is adapted to the other messages transmitted by the base station in the special subframe listening device as described below.
  • Step S403 on the downlink subframe set in the uplink and downlink ratio of the first TDD, send, by using the PDCCH or the ePDCCH, the radio network temporary identifier RA-RNTI with the random access to the elMTA user equipment plus 4 Downstream control information DCI.
  • the base station After receiving the preamble sent by the UE, the base station still does not know whether the UE is an eMTTA UE. Therefore, the DCI that is scrambled by the RA-RNTI is sent to the UE in the downlink subframe or the special subframe corresponding to the TDD ratio notified by the SIB1. Make sure all UEs receive it correctly.
  • Step S404 Receive a random access message 3 sent by the elMTA user equipment on an uplink subframe determined according to the first TDD uplink-downlink ratio.
  • Step S405 Send a contention resolution message to the elMTA user equipment on the downlink subframe set in the second TDD uplink and downlink ratio.
  • the base station After the base station receives the random access message 3 sent by the UE, it has already identified whether the UE is an elMTA user equipment or a non-elMTA user equipment, and whether the notification in the signaling sent by the (e)PDCCH is used when the UE is an eMTTA user.
  • the TDD uplink and downlink ratio is matched. Therefore, the base station sends a contention resolution message to the elMTA user equipment on the downlink subframe set in the second TDD uplink and downlink ratio.
  • the UE may have more opportunities. To receive the contention resolution message, reduce the random access delay, and improve the scheduling flexibility of the base station.
  • the base station may also send a contention resolution message to the elMTA user equipment on the downlink subframe set in the uplink and downlink ratio of the first TDD.
  • a non-elMTA user equipment and an eMTTA user equipment are uniformly received by using an uplink subframe determined by uplink and downlink ratios included in a signaling sent by a physical downlink shared channel. Sending each message in the random access process, so that the base station can accurately receive the random access message sent by the non-elMTA user equipment and the elMTA user equipment; Reduce random access delay and improve base station scheduling flexibility.
  • FIG. 6 is a flow chart of a fifth embodiment of a random access method according to the present invention. As shown in Figure 6, the method includes the following steps:
  • Step 501 The elMTA user equipment sends a pilot to the base station by using a physical random access channel (PRACH) pre-configured by the base station, or sends a reserved pilot in the pre-configured pilot or pilot set of the base station to the base station.
  • PRACH physical random access channel
  • Step S502 The elMTA user equipment receives signaling sent by the base station by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel ePDCCH, where the signaling includes a time division duplex TDD uplink and downlink ratio.
  • PDCCH physical downlink control channel
  • ePDCCH enhanced physical downlink control channel
  • Step S503 The elMTA user equipment determines to send an uplink subframe of the random access message 3 according to the TDD uplink and downlink ratio.
  • Step S504 The elMTA user equipment sends the random access message 3 to the base station in the determined uplink subframe.
  • the base station configures a new PRACH resource, or a new preamble, for the elMTA UE, or reserves a part of the preamble in the original preamble set.
  • the base station notifies the PRACH resource, or a new one.
  • the preamble, or a part of the preamble is reserved in the original preamble set to determine that the UE is an elMTA UE. Therefore, when receiving the random access message 3, the (TD) PDCCH signaling TDD ratio can be received, because the (e)PDCCH signaling TDD ratio represents the most suitable ratio of system performance, so the use The (e) PDCCH signaling TDD ratio is used to perform a random access procedure, which can improve the performance of the random access procedure.
  • the random access message 3 is received according to the TDD uplink-downlink ratio notified by the SIB1, so that the base station can accurately receive the random access message sent by the elMTA user equipment and the non-elMTA user equipment.
  • the new PRACH resource, or a new preamble, or a part of the preamble in the original preamble set may be reserved by the system broadcast message, dedicated RRC message or physical layer signaling, MAC layer signaling. Configure the mode to the UE.
  • a random access method is used to send a preamble to a base station according to a new PRACH resource pre-configured by a base station, or a new preamble, or a part of a preamble is reserved in the original preamble set.
  • the code may enable the base station to determine that the user equipment is an elMTA user equipment. Therefore, the base station accurately receives the random access message 3 sent by the elMTA user equipment and the non-elMTA user equipment.
  • FIG. 7 is a flowchart of a sixth embodiment of a random access method according to the present invention. As shown in Figure 7, the method includes the following steps:
  • Step S601 The elMTA user equipment receives a configuration notification sent by the base station in a predetermined manner, where the configuration notification includes any one of the following: a pre-configured physical random access channel PRACH, a pre-configured pilot or a pilot set in a pilot set. frequency.
  • the configuration notification includes any one of the following: a pre-configured physical random access channel PRACH, a pre-configured pilot or a pilot set in a pilot set. frequency.
  • Step S602 The elMTA user equipment sends a pilot to the base station by using the PRACH or sends a reserved pilot in the pre-configured pilot or pilot set to the base station.
  • Step S603 the elMTA user equipment receives the physical downlink control channel of the base station.
  • the signaling includes time division duplex TDD uplink and downlink ratio.
  • Step S604 The elMTA user equipment receives the random access response message sent by the base station on the downlink subframe set of the TDD uplink and downlink ratio.
  • Step S605 The elMTA user equipment determines, according to the TDD uplink-downlink ratio, an uplink subframe for transmitting the random access message 3.
  • Step S606 The elMTA user equipment sends the random access message 3 to the base station in the determined uplink subframe.
  • Step S607 The elMTA user equipment receives the contention resolution message sent by the base station on the downlink subframe set of the TDD uplink and downlink ratio.
  • the base station determines that the UE is an elMTA UE according to the new PRACH resource, or a new preamble, or a part of the preamble is reserved in the original preamble set. Therefore, the subsequent random access response message, as well as the random access message 3 and the contention resolution message, can be transmitted or received according to the (e) PDCCH signaling TDD ratio.
  • a random access method is used to send a preamble to a base station according to a new PRACH resource pre-configured by a base station, or a new preamble, or a part of a preamble is reserved in the original preamble set.
  • the code may be used by the base station to determine that the user equipment is an eMTTA user equipment, so that the base station can accurately receive the random access message 3 sent by the eMTTA user equipment and the non-elMTA user equipment; and the random access delay can be reduced, and the base station scheduling flexibility is improved. Sex.
  • FIG. 8 is a flowchart of a seventh embodiment of a random access method according to the present invention. As shown in Figure 8, The method includes the following steps:
  • Step S701 Receive a reserved pilot in a pre-configured pilot or pilot set sent by the user equipment or a pilot transmitted through a pre-configured physical random access channel PRACH.
  • Step S702 Determine that the user equipment is an elMTA user equipment.
  • Step S703 Send signaling to the elMTA user equipment by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel ePDCCH, where the signaling includes a time division duplex TDD uplink and downlink ratio.
  • Step S704 Receive, by the elMTA user equipment, the random access message 3 sent by the elMTA user equipment according to the uplink subframe determined by the TDD uplink and downlink ratio.
  • the base station configures a new PRACH resource, or a new preamble, for the elMTA UE, or reserves a part of the preamble in the original preamble set.
  • the base station notifies the PRACH resource, or a new one.
  • the preamble, or a part of the preamble is reserved in the original preamble set to determine that the UE is an elMTA UE. Therefore, when receiving the random access message 3, the (TD) PDCCH signaling TDD ratio can be received, because the (e)PDCCH signaling TDD ratio represents the most suitable ratio of system performance, so the use The (e) PDCCH signaling TDD ratio is used to perform a random access procedure, which can improve the performance of the random access procedure.
  • the random access message 3 is received according to the TDD uplink-downlink ratio notified by the SIB1, so that the base station can accurately receive the random access message sent by the elMTA user equipment and the non-elMTA user equipment.
  • the new PRACH resource, or a new preamble, or a part of the preamble in the original preamble set may be reserved by the system broadcast message, dedicated RRC message or physical layer signaling, MAC layer signaling. Configure the mode to the UE.
  • a random access method is used to send a preamble to a base station according to a new PRACH resource pre-configured by a base station, or a new preamble, or a part of a preamble is reserved in the original preamble set.
  • the code may be used by the base station to determine that the user equipment is an eMTTA user equipment, so that the base station accurately receives the random access message 3 sent by the elMTA user equipment and the non-elMTA user equipment.
  • FIG. 9 is a flowchart of an eighth embodiment of a random access method according to the present invention. As shown in FIG. 9, the method includes the following steps: Step S801: Send a configuration notification to the elMTA user equipment by using a predetermined manner, where the configuration notification includes any one of the following: a pre-configured physical random access channel (PRACH), a pre-configured pilot, or a reserved pilot in a pilot set.
  • PRACH physical random access channel
  • pilot a pre-configured pilot
  • Step S802 Receive a reserved pilot in the pre-configured pilot or pilot set sent by the elMTA user equipment or a pilot sent by using the PRACH.
  • Step S803 determining that the user equipment is an elMTA user equipment.
  • Step S804 sending, by using the physical downlink control channel physical downlink control channel PDCCH or the enhanced physical downlink control channel ePDCCH, signaling to the elMTA user equipment, where the signaling includes a time division duplex TDD uplink and downlink ratio.
  • Step S805 Send a random access response message to the elMTA user equipment on the downlink subframe set of the TDD uplink and downlink ratio.
  • Step S806 Receive, by the elMTA user equipment, the random access message 3 sent by the elMTA user equipment according to the uplink subframe determined by the TDD uplink and downlink ratio.
  • Step S807 Send a contention resolution message to the elMTA user equipment on the downlink subframe set of the TDD uplink and downlink ratio.
  • the base station determines that the UE is an elMTA UE according to the new PRACH resource, or a new preamble, or a part of the preamble is reserved in the original preamble set. Therefore, the subsequent random access response message, as well as the random access message 3 and the contention resolution message, can be transmitted or received according to the (e) PDCCH signaling TDD ratio.
  • a random access method is used to send a preamble to a base station according to a new PRACH resource pre-configured by a base station, or a new preamble, or a part of a preamble is reserved in the original preamble set.
  • the code may be used by the base station to determine that the user equipment is an eMTTA user equipment, so that the base station can accurately receive the random access message 3 sent by the eMTTA user equipment and the non-elMTA user equipment; and the random access delay can be reduced, and the base station scheduling flexibility is improved. Sex.
  • FIG. 10 is a schematic structural diagram of a first embodiment of a user equipment according to the present invention. As shown in FIG. 10, the user equipment 1000 includes:
  • the receiving unit 11 is configured to receive first signaling that is sent by the base station to the eMTTA user equipment by using the physical downlink shared channel (PDSCH), and send the base station to the eMTTA user by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel ePDCCH.
  • the second signaling of the device where the first signaling includes a first time division duplex TDD uplink and downlink ratio, and the second signaling includes a second TDD Up and down ratio.
  • the first signaling sent by the base station may be received through the PDSCH, and the first signaling may be SIB1.
  • the first TDD uplink and downlink ratio is included in the first signaling, and the first TDD uplink and downlink ratio is semi-statically configured.
  • the second receiving unit 12 may also receive the second signaling sent by the base station through the (e)PDCCH.
  • the second TDD uplink and downlink ratio is included in the second signaling, and the second TDD uplink and downlink ratio can be dynamically changed, for example, 10ms to 40ms to change the uplink and downlink ratio.
  • the subframe type and ratio rule included in the first TDD uplink-downlink ratio and the second TDD uplink-downlink ratio are still the uplink-downlink ratios as shown in Table 1.
  • a determining unit 12 configured to determine, according to the first TDD uplink-downlink ratio, to send a random access message
  • Msg3 is sent according to the first TDD uplink and downlink ratio.
  • the determining unit 13 of the elMTA user does not determine n+k1 according to the TDD uplink-downlink ratio notified in the (e)PDCCH, or determines the subframe in which the Msg3 is transmitted, but determines the TDD ratio notified in the SIB1. n+kl , or to determine the subframe in which Msg3 is sent.
  • the sending unit 13 is configured to send the random access message 3 to the base station in the determined uplink subframe.
  • the first transmitting unit 14 of the elMTA user equipment transmits Msg3 to the base station on the determined uplink subframe.
  • the base station knows that the non-elMTA user equipment and the elMTA user equipment uniformly use the uplink subframe determined according to the uplink and downlink ratio notified by the SIB1 to send the Msg3, so that the base station can accurately receive the non-elMTA user.
  • the device and the Msg3 sent by the elMTA user equipment maintain backward compatibility of the non-elMTA user equipment before the R12 version.
  • the user equipment is configured to send the random access by using the uplink subframe determined by the uplink and downlink ratios included in the signaling sent by the physical downlink shared channel by using the non-elMTA user equipment and the eMTTA user equipment.
  • Message 3 enabling the base station to accurately receive non-elMTA Random access message 3 sent by the user equipment and the elMTA user equipment.
  • FIG. 11 is a schematic structural diagram of a second embodiment of a user equipment according to the present invention. As shown in FIG. 11, the user equipment 2000 includes:
  • the receiving unit 21 is configured to receive, by the base station, the first signaling that is sent by the base station to the eMTTA user equipment by using the physical downlink shared channel (PDSCH), and send the base station to the eMTTA user by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel ePDCCH.
  • the second signaling of the device where the first signaling includes a first time division duplex TDD uplink and downlink ratio, and the second signaling includes a second TDD uplink and downlink ratio.
  • the receiving unit 21 is further configured to monitor, on the downlink subframe set in the second TDD uplink and downlink ratio, the physical downlink control channel command PDCCH Order or the enhanced physical downlink control channel command ePDCCH Orde sent by the base station.
  • the receiving unit 21 may monitor (e) the PDCCH Order according to the TDD uplink and downlink ratio notified in the signaling sent by the (e) PDCCH, specifically, in the TDD proportion of the signaling notified by the (e) PDCCH.
  • a downlink subframe or a special subframe is used to listen to (e) PDCCH order.
  • the UE since the downlink subframes available in the TDD ratio notified in the signaling sent by the (e) PDCCH are more than the downlink subframes available in the TDD ratio notified in the SIB1, the UE can have more opportunities to receive ( e) PDCCH Order, reduce random access delay, and improve base station scheduling flexibility.
  • the UE may also monitor the (e)PDCCH Order sent by the base station according to the TDD ratio notified in the message sent through the PDSCH, and the message may be SIB1.
  • the downlink subframe set may include a special subframe.
  • the UE may receive other downlink data according to the downlink subframe type. This case is adapted to the other messages transmitted by the base station listening to the special subframe as described below.
  • the base station Since (e) the PDCCH order is sent by the base station to the UE in the connected state, the base station is triggered to perform random access, so the base station usually knows whether the UE is an elMTA user, and whether the (e)PDCCH is used when the UE is an eMTTA user. The TDD uplink and downlink ratio notified in the signaling.
  • the sending unit 23 is configured to send a pilot preamble to the base station on the uplink subframe set in the first TDD uplink and downlink ratio.
  • the transmitting unit 23 of the elMTA user equipment sends the preamble according to the uplink subframe in the TDD uplink and downlink ratio notified by the SIB1, so that the base station can accurately receive the preamble sent by the user equipment.
  • the (e)PDCCH order carries the preamble sequence number.
  • the existing protocol specifies that: the user receives the (e)PDCCH order in the subframe n, then the n+k2 subframe.
  • the base station may send (e) the PDCCH order to the user equipment to trigger the random access procedure of the user equipment, or the user equipment itself may trigger the random access procedure.
  • the receiving unit 21 is further configured to: on the downlink subframe set in the first TDD uplink-downlink ratio, listen to the radio network temporary identifier RA-RNTI that is sent by the base station by using the PDCCH or the ePDCCH, and add 4 Especially the downlink control information DCI.
  • the third monitoring unit 25 monitors the DCI that is scrambled by the RA-RNTI according to the downlink subframe or the special subframe corresponding to the TDD ratio notified by the SIB1. All UEs can receive it correctly.
  • a determining unit 22 configured to determine, according to the first TDD uplink and downlink ratio, to send a random access message
  • the sending unit 23 is further configured to send the random access message 3 to the base station on the determined uplink subframe.
  • the receiving unit 21 is further configured to receive, on the downlink subframe set in the second TDD uplink and downlink ratio, a contention resolution message sent by the base station.
  • the base station After the base station receives the random access message 3 sent by the UE, it has already identified whether the UE is an elMTA user equipment or a non-elMTA user equipment, and whether the notification in the signaling sent by the (e)PDCCH is used when the UE is an eMTTA user.
  • the TDD uplink and downlink ratio is matched. Therefore, the receiving unit 21 monitors the contention resolution message according to the TDD uplink and downlink ratio notified in the signaling sent by the (e)PDCCH.
  • the UE may have more opportunities. To receive the contention resolution message, reduce the random access delay, and improve the scheduling flexibility of the base station.
  • the UE may also monitor the user equipment according to the embodiment of the present invention by using the TDD uplink-downlink ratio notified by the SIB1, by using the non-elMTA user equipment and
  • the elMTA user equipment uniformly uses the uplink subframe determined by the uplink and downlink ratios included in the signaling sent by the physical downlink shared channel to receive and send each message in the random access procedure, so that the base station can accurately receive the non-elMTA user equipment.
  • the random access message sent by the eMTTA user equipment also reduces the power overhead and uplink interference caused by the eMTTA user equipment to determine the random access message 3 transmission time and the random access message 3 according to the second TDD uplink-downlink ratio.
  • the random access delay can be reduced, and the base station scheduling flexibility is improved.
  • FIG. 12 is a schematic structural diagram of a third embodiment of a user equipment according to the present invention. As shown in FIG. 12, the user equipment 7000 includes:
  • the sending unit 73 is configured to send a pilot to the base station by using a physical random access channel (PRACH) pre-configured by the base station, or send a pre-relay in the set of pilots or pilots pre-configured by the base station to the base station.
  • PRACH physical random access channel
  • the receiving unit 71 is configured to receive signaling sent by the base station by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel ePDCCH, where the signaling includes a time division duplex TDD uplink and downlink ratio.
  • the determining unit 72 is configured to determine, according to the TDD uplink and downlink ratio, an uplink subframe that sends the random access message 3.
  • the sending unit 73 is further configured to send the random access message 3 to the base station on the determined uplink subframe.
  • the base station configures a new PRACH resource, or a new preamble, for the elMTA UE, or reserves a part of the preamble in the original preamble set.
  • the base station notifies the PRACH resource, or a new one.
  • the preamble, or a part of the preamble is reserved in the original preamble set to determine that the UE is an elMTA UE. Therefore, when receiving the random access message 3, the (TD) PDCCH signaling TDD ratio can be received, because the (e)PDCCH signaling TDD ratio represents the most suitable ratio of system performance, so the use The (e) PDCCH signaling TDD ratio is used to perform a random access procedure, which can improve the performance of the random access procedure.
  • the random access message 3 is received according to the TDD uplink-downlink ratio notified by the SIB1, so that the base station can accurately receive the random access message sent by the elMTA user equipment and the non-elMTA user equipment.
  • the new PRACH resource, or a new preamble, or the original A part of the preamble is reserved in the preamble set, and can be configured to the UE by using a system broadcast message, a dedicated RRC message, or physical layer signaling, and MAC layer signaling.
  • a user equipment sends a preamble to a base station according to a new PRACH resource pre-configured by a base station, or a new preamble, or a part of a preamble is reserved in the original preamble set.
  • the base station can be configured to determine that the user equipment is an eMTTA user equipment, so that the base station can accurately receive the random access message 3 sent by the eMTTA user equipment and the non-elMTA user equipment.
  • FIG. 13 is a schematic structural diagram of a fourth embodiment of a user equipment according to the present invention. As shown in FIG. 13, the user equipment 8000 includes:
  • the receiving unit 81 is configured to receive a configuration notification sent by the base station by using a predetermined manner, where the configuration notification includes any one of the following: a pre-configured physical random access channel (PRACH), a pre-configured pilot, or a pre-configured pilot set. frequency.
  • PRACH physical random access channel
  • pilot pre-configured pilot set. frequency.
  • the sending unit 83 is configured to send a pilot to the base station by using the PRACH or send the reserved pilot in the pre-configured pilot or pilot set to the base station.
  • the receiving unit 81 is further configured to receive signaling sent by the base station by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel ePDCCH, where the signaling includes a time division duplex TDD uplink and downlink ratio.
  • the receiving unit 81 is further configured to receive, on the downlink subframe set of the TDD uplink and downlink ratio, a random access response message sent by the base station.
  • the determining unit 85 is configured to determine, according to the TDD uplink and downlink ratio, an uplink subframe that sends the random access message 3.
  • the sending unit 83 is further configured to send the random access message 3 to the base station on the determined uplink subframe.
  • the receiving unit 81 is further configured to receive, on the downlink subframe set of the TDD uplink and downlink ratio, a contention resolution message sent by the base station.
  • the base station determines that the UE is an elMTA UE according to the new PRACH resource, or a new preamble, or a part of the preamble is reserved in the original preamble set. Therefore, the subsequent random access response message, as well as the random access message 3 and the contention resolution message, can be transmitted or received according to the (e) PDCCH signaling TDD ratio.
  • a user equipment by using a new pre-configured according to a base station
  • the PRACH resource, or a new preamble, or a part of the preamble is reserved in the original preamble set, and the preamble is sent to the base station, so that the base station determines that the user equipment is an eMTTA user equipment, so that the base station accurately receives the eMTTA.
  • the random access message 3 sent by the user equipment and the non-elMTA user equipment can reduce the random access delay and improve the scheduling flexibility of the base station.
  • FIG. 14 is a schematic structural diagram of a first embodiment of a base station according to the present invention. As shown in Figure 14, the base station 3000 includes:
  • the sending unit 31 is configured to send the first signaling to the elMTA user equipment by using the physical shared channel PDSCH, and send the second signaling to the eMTTA user equipment by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel ePDCCH, where
  • the first signaling includes a first time division duplex TDD uplink and downlink ratio
  • the second signaling includes a second TDD uplink and downlink ratio.
  • the base station Before the base station correctly receives the random access message 3, the base station does not know that each message before the random access message 3 is sent is an eMTTA user equipment or a non-elMTA user equipment, but the sending unit 31 can send the elMTA user equipment and the non-elMTA user equipment through the PDSCH.
  • the first signaling is sent, and the first signaling may be SIB1.
  • the first TDD uplink and downlink ratio is included in the first signaling, and the first TDD uplink and downlink ratio is semi-statically configured.
  • the second signaling sent by the base station can also be received through the (e)PDCCH. Therefore, the sending unit 31 sends the second signaling to the elMTA user equipment through the (e)PDCCH.
  • the second TDD uplink and downlink ratio is included in the second signaling, and the second TDD uplink and downlink ratio can be dynamically changed, for example, 10ms to 40ms to change the uplink and downlink ratio.
  • the subframe type and ratio rule included in the first TDD uplink-downlink ratio and the second TDD uplink-downlink ratio are still the uplink-downlink ratios as shown in Table 1.
  • the receiving unit 32 is configured to receive the random access message 3 sent by the elMTA user equipment on an uplink subframe determined according to the first TDD uplink and downlink ratio.
  • Msg3 is sent according to the first TDD uplink and downlink ratio.
  • the elMTA user does not determine the subframe in which the Msg3 is transmitted according to the TDD uplink-downlink ratio notified in the (e) PDCCH, but determines the subframe in which the Msg3 is transmitted according to the TDD ratio notified in the SIB1. Therefore, for the non-elMTA user equipment or the elMTA user equipment, the receiving unit 32 can accurately receive the Msg3 they transmit on the uplink subframe determined according to the first TDD uplink-downlink ratio.
  • the base station knows that the non-elMTA user equipment and the elMTA are used.
  • the user equipment uniformly transmits the Msg3 according to the uplink subframe determined by the uplink and downlink ratio notified by the SIB1. Therefore, the base station can accurately receive the Msg3 sent by the non-elMTA user equipment and the elMTA user equipment, and maintain the non-elMTA before the R12 version. Backward compatibility of user devices.
  • a base station is configured to send a random access message by using an uplink subframe determined by uplink and downlink ratios included in a signaling sent by a physical downlink shared channel by using a non-elMTA user equipment and an eMTTA user equipment. 3, so that the base station can accurately receive the random access message 3 sent by the non-elMTA user equipment and the elMTA user equipment.
  • FIG. 15 is a schematic structural diagram of a second embodiment of a base station according to the present invention. As shown in Figure 15, the base station 4000 includes:
  • the sending unit 41 is configured to send the first signaling to the elMTA user equipment by using the physical shared channel PDSCH, and send the second signaling to the elMTA user equipment by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel ePDCCH, where
  • the first signaling includes a first time division duplex TDD uplink and downlink ratio
  • the second signaling includes a second TDD uplink and downlink ratio.
  • the sending unit 41 is further configured to send, on the downlink subframe set in the uplink and downlink ratio of the second TDD, a physical downlink control channel command PDCCH Order or an enhanced physical downlink control channel to the user equipment that enables the eLMTA function. Directs the ePDCCH Order.
  • the sending unit 41 sends (e) the PDCCH Order to the elMTA user equipment on the downlink subframe set in the second TDD uplink and downlink ratio, such that the downlink is available in the TDD ratio notified in the signaling of the (e) PDCCH transmission.
  • the subframe is more than the downlink subframes available in the TDD ratio notified in SIB 1, which allows the UE to have more opportunities to receive the (e)PDCCH order, reduce the random access delay, and improve the scheduling flexibility of the base station.
  • the base station may also send (e) the PDCCH Order to the elMTA user equipment on the downlink subframe set of the first TDD uplink and downlink ratio.
  • the downlink subframe set may include a special subframe.
  • the base station sends the (e)PDCCH Order to the elMTA user equipment on the downlink subframe set in the uplink and downlink ratio of the second TDD
  • the corresponding subframe type that can be indicated in the TDD uplink and downlink ratio is a downlink subframe
  • the UE Other downlink data may be received according to the downlink subframe type. This case is adapted to the other messages transmitted by the base station in the special subframe listening device as described below.
  • the sending unit 41 is further configured to send, by using the PDCCH or the ePDCCH, the radio network temporary identifier RA-RNTI that uses random access by using the PDCCH or ePDCCH on the downlink subframe set in the first TDD uplink and downlink ratio.
  • Downstream control information DCI DCI.
  • the base station After receiving the preamble sent by the UE, the base station still does not know whether the UE is an elMTA UE, and sends a DCI scrambled by the RA-RNTI to ensure that all UEs can receive correctly.
  • the receiving unit 42 is configured to receive the random access message 3 sent by the elMTA user equipment on the uplink subframe determined according to the first TDD uplink and downlink ratio.
  • the sending unit 41 is further configured to send a contention resolution message to the elMTA user equipment on the downlink subframe set in the second TDD uplink and downlink ratio.
  • the base station After the base station receives the random access message 3 sent by the UE, it has already identified whether the UE is an elMTA user equipment or a non-elMTA user equipment, and whether the notification in the signaling sent by the (e)PDCCH is used when the UE is an eMTTA user.
  • the TDD uplink and downlink ratio is matched. Therefore, the sending unit 41 sends a contention resolution message to the elMTA user equipment on the downlink subframe set in the second TDD uplink and downlink ratio.
  • the UE may have more opportunities. To receive the contention resolution message, reduce the random access delay, and improve the scheduling flexibility of the base station.
  • the base station may also send a contention resolution message to the elMTA user equipment on the downlink subframe set in the uplink and downlink ratio of the first TDD.
  • a base station is configured to receive and transmit a random connection by using an uplink subframe determined by uplink and downlink ratios included in a signaling sent by a physical downlink shared channel by using a non-elMTA user equipment and an eMTTA user equipment.
  • Each message in the process is forwarded, so that the base station can accurately receive the random access message sent by the non-elMTA user equipment and the eMTTA user equipment; and can reduce the random access delay and improve the scheduling flexibility of the base station.
  • FIG. 16 is a schematic structural diagram of a third embodiment of a base station according to the present invention. As shown in Figure 16, the base station 9000 includes:
  • the receiving unit 91 is configured to receive a reserved pilot in a pre-configured pilot or pilot set sent by the user equipment or a pilot transmitted through a pre-configured physical random access channel PRACH.
  • the determining unit 92 is configured to determine that the user equipment is an elMTA user equipment.
  • the sending unit 93 is configured to send, by using the physical downlink control channel PDCCH or the enhanced physical downlink control channel ePDCCH, the signaling to the user equipment that enables the eMTTA function, where the signaling includes a time division duplex TDD uplink and downlink ratio.
  • the receiving unit 91 is further configured to receive the random access message 3 sent by the eMTTA user equipment on the uplink subframe determined by the eMTTA user equipment according to the TDD uplink and downlink ratio.
  • the base station configures a new PRACH resource, or a new preamble, for the elMTA UE, or reserves a part of the preamble in the original preamble set.
  • the base station notifies the PRACH resource, or a new one.
  • the preamble, or a part of the preamble is reserved in the original preamble set to determine that the UE is an elMTA UE. Therefore, when receiving the random access message 3, the (TD) PDCCH signaling TDD ratio can be received, because the (e)PDCCH signaling TDD ratio represents the most suitable ratio of system performance, so the use The (e) PDCCH signaling TDD ratio is used to perform a random access procedure, which can improve the performance of the random access procedure.
  • the random access message 3 is received according to the TDD uplink-downlink ratio notified by the SIB1, so that the base station can accurately receive the random access message sent by the elMTA user equipment and the non-elMTA user equipment.
  • the new PRACH resource, or a new preamble, or a part of the preamble in the original preamble set may be reserved by the system broadcast message, dedicated RRC message or physical layer signaling, MAC layer signaling. Configure the mode to the UE.
  • a base station may send a preamble to a base station according to a new PRACH resource pre-configured by the base station, or a new preamble, or a part of the preamble is reserved in the original preamble set.
  • the base station is configured to determine that the user equipment is an eMTTA user equipment, so that the base station accurately receives the random access message 3 sent by the eMTTA user equipment and the non-elMTA user equipment.
  • FIG. 17 is a schematic structural diagram of a fourth embodiment of a base station according to the present invention. As shown in Figure 17, the base station 10000 includes:
  • the sending unit 113 is configured to send, by using a predetermined manner, a configuration notification to the elMTA user equipment, where the configuration notification includes any one of the following: a pre-configured physical random access channel (PRACH), a pre-configured pilot, or a reservation in a pilot set. Pilot.
  • PRACH physical random access channel
  • pilot a pre-configured pilot
  • the receiving unit 111 is configured to receive a reserved pilot in the pre-configured pilot or pilot set sent by the elMTA user equipment or a pilot sent by using the PRACH.
  • the determining unit 112 is configured to determine that the user equipment is an elMTA user equipment.
  • the sending unit 113 is further configured to pass the physical downlink control channel PDCCH or enhanced physical downlink control.
  • the channel ePDCCH sends signaling to the user equipment that enables the eMTTA function, where the signaling includes a time division duplex TDD uplink and downlink ratio.
  • the sending unit 113 is further configured to send a random access response message to the elMTA user equipment on the downlink subframe set of the TDD uplink and downlink ratio.
  • the receiving unit 111 is further configured to receive, according to the uplink subframe determined by the TDD uplink and downlink ratio, the random access message 3 sent by the elMTA user equipment.
  • the sending unit 113 is further configured to send a contention resolution message to the elMTA user equipment on the downlink subframe set of the TDD uplink and downlink ratio.
  • the base station determines that the UE is an elMTA UE according to the new PRACH resource, or a new preamble, or a part of the preamble is reserved in the original preamble set. Therefore, the subsequent random access response message, as well as the random access message 3 and the contention resolution message, can be transmitted or received according to the (e) PDCCH signaling TDD ratio.
  • a base station may send a preamble to a base station according to a new PRACH resource pre-configured by the base station, or a new preamble, or a part of the preamble is reserved in the original preamble set.
  • the base station is configured to determine that the user equipment is an eMTTA user equipment, so that the base station can accurately receive the random access message 3 sent by the eMTTA user equipment and the non-elMTA user equipment; and the random access delay can be reduced, and the scheduling flexibility of the base station is improved.
  • FIG. 18 is a schematic structural diagram of a fifth embodiment of a user equipment according to the present invention. As shown in FIG. 18, the user equipment 5000 includes:
  • Receiver 51 processor 52 and transmitter 53.
  • a receiver configured to receive first signaling that is sent by the base station to the eMTTA user equipment by using the physical downlink shared channel (PDSCH), and send the base station to the eMTTA user equipment by using a physical downlink control channel PDCCH or an enhanced physical downlink control channel (ePDCCH)
  • the second signaling where the first signaling includes a first time division duplex TDD uplink and downlink ratio;
  • a processor configured to determine, according to the first TDD uplink-downlink ratio, an uplink subframe that sends a random access message 3;
  • a transmitter configured to send the random access message to the base station on the determined uplink subframe
  • the transmitter before the transmitting, by the transmitter, the step of sending the random access message 3 to the base station in the determined uplink subframe, the transmitter is further configured to perform the following steps:
  • the receiver before the step of transmitting, by the transmitter, the pilot preamble to the base station in the uplink subframe set in the first TDD uplink and downlink ratio, the receiver further uses Perform the following steps:
  • the receiver before the transmitting, by the transmitter, the step of sending the random access message 3 to the base station in the determined uplink subframe, the receiver is further configured to perform the following steps. :
  • the downlink control information DCI that is scrambled by the radio network temporary identifier RA-RNTI that is sent by the base station by using the PDCCH or the ePDCCH.
  • the receiver is further configured to perform the following steps. :
  • the first signaling is system information block 1.
  • the user equipment is configured to enable the non-elMTA user equipment and the eMTTA user equipment to uniformly use the uplink and downlink configurations included in the signaling sent by the physical downlink shared channel.
  • the random access message 3 is sent in the determined uplink subframe, so that the base station can accurately receive the random access message 3 sent by the non-elMTA user equipment and the eMTTA user equipment, and also reduces the eMTTA user equipment according to the second TDD uplink and downlink.
  • the power overhead and the uplink interference problem caused by the random access message 3 sending time and the random access message 3 are determined; and the random access delay can be reduced, and the base station scheduling flexibility is improved.
  • FIG. 19 is a schematic structural diagram of an embodiment of a base station according to the present invention. As shown in Figure 19, the base station 6000 includes:
  • Transmitter 61 and receiver 62 are identical to Transmitter 61 and receiver 62.
  • a transmitter configured to send, by using a physical shared channel, the PDSCH, the first signaling to the elMTA user equipment, and send, by using the physical downlink control channel PDCCH or the enhanced physical downlink control channel ePDCCH, the second signaling to the elMTA user equipment, where
  • the signaling includes a first time division duplex TDD uplink and downlink ratio, and the second signaling includes a second TDD uplink and downlink ratio;
  • a receiver configured to receive the random access message 3 sent by the elMTA user equipment on an uplink subframe determined according to the first TDD uplink-downlink ratio.
  • the receiver performs the step of receiving the random access message 3 sent by the eMTTA user equipment on an uplink subframe determined according to the first TDD uplink-downlink ratio.
  • the transmitter is also used to perform the following steps:
  • the receiving before the step of receiving the random access message 3 sent by the eMTTA user equipment according to the first uplink subframe determined by the first TDD uplink-downlink ratio, is performed,
  • the transmitter is further configured to perform the following steps:
  • the receiver performs the receiving the elMTA user setting After the step of the random access message 3 sent on the first uplink subframe determined according to the first TDD uplink-downlink ratio, the transmitter is further configured to perform the following steps:
  • the first signaling is system information block 1.
  • a base station device receives and transmits a random sequence by using an uplink subframe determined by uplink and downlink ratios included in a signaling sent by a physical downlink shared channel by using a non-elMTA user equipment and an eMTTA user equipment.
  • Each message in the process is accessed, so that the base station can accurately receive the random access message sent by the non-elMTA user equipment and the eMTTA user equipment; and can reduce the random access delay and improve the scheduling flexibility of the base station.
  • FIG. 6 is a flow chart of a fifth embodiment of a random access method according to the present invention. As shown in Figure 6, the method includes the following steps:
  • Step 501 Send a pilot to the base station by using a physical random access channel (PRACH) pre-configured by the base station, or send a reserved pilot in a pre-configured pilot or pilot set of the base station to the base station.
  • PRACH physical random access channel
  • Step S502 Receive signaling that is sent by the base station by using a physical downlink control channel (e) PDCCH, where the signaling includes a time division duplex TDD uplink and downlink ratio.
  • e physical downlink control channel
  • Step S503 determining, according to the TDD uplink-downlink ratio, an uplink subframe for transmitting the random access message 3.
  • Step S504 Send the random access message to the base station in the determined uplink subframe.
  • FIG. 7 is a flowchart of a sixth embodiment of a random access method according to the present invention. As shown in Figure 7, the method includes the following steps:
  • Step S601 Receive a configuration notification sent by the base station by using a predetermined manner, where the configuration notification includes any one of the following: a pre-configured physical random access channel (PRACH), a pre-configured pilot, or a reserved pilot in a pilot set.
  • PRACH physical random access channel
  • Step S602 Send a pilot to the base station by using the PRACH or send a reserved pilot in the pre-configured pilot or pilot set to the base station.
  • Step S603 receiving signaling that the base station sends through the physical downlink control channel (e) PDCCH,
  • the signaling includes a time division duplex TDD uplink and downlink ratio.
  • Step S604 Receive a random access response message sent by the base station on the downlink subframe set of the TDD uplink and downlink ratio.
  • Step S605 determining, according to the TDD uplink-downlink ratio, an uplink subframe for transmitting the random access message 3.
  • Step S606 Send the random access message to the base station in the determined uplink subframe.
  • Step S607 Receive a contention resolution message sent by the base station on the downlink subframe set of the TDD uplink and downlink ratio.
  • FIG. 8 is a flowchart of a seventh embodiment of a random access method according to the present invention. As shown in Figure 8, the method includes the following steps:
  • Step S701 Receive a reserved pilot in a pre-configured pilot or pilot set sent by the user equipment or a pilot transmitted through a pre-configured physical random access channel PRACH.
  • Step S702 Determine that the user equipment is a user equipment that enables the elMTA function.
  • Step S703 Send signaling to the user equipment that enables the elMTA function by using a physical downlink control channel (e) PDCCH, where the signaling includes a time division duplex TDD uplink and downlink ratio.
  • e physical downlink control channel
  • Step S704 Receive, by the user equipment that enables the elMTA function, the random access message 3 sent by the user equipment enabled with the elMTA function, according to the uplink subframe determined by the TDD uplink and downlink ratio.
  • FIG. 9 is a flowchart of an eighth embodiment of a random access method according to the present invention. As shown in Figure 9, the method includes the following steps:
  • Step S801 Send a configuration notification to the user equipment by using a predetermined manner, where the configuration notification includes any one of the following: a pre-configured physical random access channel (PRACH), a pre-configured pilot, or a reserved pilot in a pilot set.
  • PRACH physical random access channel
  • Step S802 receiving a reserved pilot in the pre-configured pilot or pilot set sent by the user equipment or a pilot sent by using the PRACH.
  • Step S803 determining that the user equipment is a user equipment that enables the elMTA function.
  • Step S804 sending, by using a physical downlink control channel (e) PDCCH, signaling to the user equipment that enables the elMTA function, where the signaling includes a time division duplex TDD uplink and downlink ratio.
  • e physical downlink control channel
  • Step S805 on the downlink subframe set of the TDD uplink and downlink ratio, to the enable elMTA
  • the functional user equipment sends a random access response message.
  • Step S806 The user equipment that is enabled with the elMTA function receives the random access message 3 sent by the user equipment enabled with the elMTA function in the uplink subframe determined by the TDD uplink and downlink ratio.
  • Step S807 Send a contention resolution message to the user equipment that enables the elMTA function on the downlink subframe set of the TDD uplink and downlink ratio.
  • the disclosed apparatus and method may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the modules is only a logical function division.
  • there may be another division manner for example, multiple modules or components may be combined or Can be integrated into another device, or some features can be ignored, or not executed.
  • the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some communication interface, device or module, and may be in electrical, mechanical or other form.
  • the modules described as separate components may or may not be physically separate, and may also be distributed over multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the objectives of the solution of the embodiment.
  • each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module.

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Abstract

一种随机接入方法及相关装置。其中的方法包括:接收基站通过物理下行共享信道PDSCH发送给elMTA用户设备的第一信令,以及接收基站通过物理下行控制信道PDCCH或增强的物理下行控制信道ePDCCH发送给elMTA用户设备的第二信令,第一信令包含第一时分双工TDD上下行配比接收基站,第二信令包含第二TDD上下行配比;elMTA用户设备根据第一TDD上下行配比确定发送随机接入消息3的上行子帧;elMTA用户设备在确定的上行子帧上向基站发送随机接入消息3。还公开了相应的装置。通过使非elMTA用户设备和elMTA用户设备都统一采用物理下行共享信道发送的信令中包含的上下行配比确定的上行子帧来发送随机接入消息3,使得基站能准确地接收到非elMTA用户设备和elMTA用户设备发送的随机接入消息3。

Description

一种随城入方法 ¾ 目关装置
技术领域
本发明涉及通信技术领域, 尤其涉及一种随机接入方法及相关装置。 背景技术
长期演进( Long Term Evolution, LTE )系统支持时分双工( Time Division Duplexing, TDD )方式, 即上行链路 ( Uplink, UL )和下行链路 ( Downlink, DL )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,最快 640毫秒( ms ) 改变一次配比, 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, 尤其对于用户设备数较少的小区尤为严重。 因此为了有 效提升资源利用率, 新版本系统中, TDD 上下行配比可以动态改变, 例如 10ms~40ms改变一次上下行配比, 基站 (eNodeB , eNB)通过传统的物理下行控 制信道( Physical Downlink Control Channel, PDCCH )或增强的物理下行控制 信道 ( enhanced Physical Downlink Control Channel, ePDCCH )来通知 TDD上 下行配比, 本文下面不 #文特殊说明, 物理层下行控制信道指的是传统的物理下 行控制信道或增强的物理下行控制信道 ( enhanced Physical Downlink Control Channel , ePDCCH ) , 物理层下行控制信道可以筒写为(e)PDCCH.由于 (e)PDCCH是比较动态, 从而实现动态更改 TDD的上下行配比。 支持 TDD上 下行配比动态改变这个功能的用户设备, 称之为进一步增强 LTE TDD的下行 上行干扰管理和业务适配(Further Enhancements to LTE TDD for DL-UL Interference Management and Traffic Adaptation , elMTA)用户设备, 本文为了筒 化, 称之为 elMTA用户设备。
由于通信网络中同时存在 elMTA用户设备和非 elMTA用户设备,其中非 elMTA 用户设备至少包括第三代合作伙伴计划版本 12(The 3rd Generation Partnership Project Release 12, 3 GPP R12)之前版本的用户设备(User Equipment, UE)和不具备 elMTA功能的 3GPP R12以及 3GPP R12以后版本的 用户设备, 当 elMTA 用户设备和非 elMTA 用户设备在同一随机接入信道 (Random Access Channel, RACH)资源上发送同一前导码 (Preamble, 也称作前 缀, 或导频), 在同一的下行资源上接收随机接入消息 2 (随机接入响应)后, 然后再按照现有协议规定的定时关系来发送随机接入消息 3(可以筒写为 Msg3), 现有协议规定假设在子帧 n收到随机接入响应, 那么在第一个上行子 帧 n+kl上发送 Msg3, 其中 kl>=6, 子帧的标号为 0 ~ 9; 当随机接入响应授 权中上行延迟域值为 0,那么子帧 n+kl是第一个可用的上行子帧( available UL subframe ), 当随机接入响应授权中上行延迟域值为 1 , 那么在子帧 n+kl之后 的第一可用的上行子帧上发送 Msg3。 那么 elMTA用户设备按照 (e)PDCCH里 面通知的 TDD上下行配比来确定 n+kl , 或者说来确定发送 Msg3的子帧。 而 非 elMTA用户设备按照系统信息块 1 ( system information blockl , SIB1 )里通 知的 TDD 上下行配比来确定 n+kl , 或者说来确定发送 Msg3 的子帧, 且 (e)PDCCH上通知的 TDD上下行配比和 SIB1里面通知的 TDD上下行配比可 能不一样的, 由于基站在正确收到 RACH Msg3之前并不知道发送该 preamble 的用户设备是 elMTA用户设备还是非 elMTA用户设备,所以基站也不知道所 述用户设备会按照哪种配比来确定 n+kl或者发送 Msg3的上行子帧。 这样就 存在非 elMTA用户设备和 elMTA用户设备以及基站对于发送 Msg3的上行子 帧的理解是不一致的, 那么就可能存在基站接收不到对应的 Msg3。
综上所述, 在随机接入过程中, 如何使基站准确接收到 elMTA用户设备 和非 elMTA用户设备发送的随机接入消息 3成为目前迫切需要解决的问题。 发明内容
本发明实施例提供了一种随机接入方法及相关装置,可以使基站能准确地 接收到非 elMTA用户设备和 elMTA用户设备发送的随机接入消息 3。
第一方面, 提供了一种随机接入方法, 包括:
接收基站通过物理下行共享信道 PDSCH发送给 elMTA用户设备的第一 信令, 以及接收所述基站通过物理下行控制信道 PDCCH或增强的物理下行控 制信道 ePDCCH发送给所述 elMTA用户设备的第二信令, 所述第一信令包含 第一时分双工 TDD上下行配比, 所述第二信令包含第二 TDD上下行配比; 所述 elMTA用户设备根据所述第一 TDD上下行配比确定发送随机接入消 息 3的上行子帧; 所述 elMTA用户设备在所述确定的上行子帧上向所述基站发送所述随机 接入消息 3。
在第一种可能的实现方式中, 所述 elMTA用户设备在所述确定的上行子 帧上向所述基站发送所述随机接入消息 3之前, 所述方法还包括:
所述 elMTA用户设备在所述第一 TDD上下行配比中的上行子帧集合上发 送导频 preamble给所述基站。
结合第一方面的第一种可能的实现方式,在第二种可能的实现方式中, 所 述 elMTA用户设备在所述第一 TDD上下行配比中的上行子帧集合上发送导频 preamble给所述基站之前, 所述方法还包括:
在所述第二 TDD上下行配比中的下行子帧集合上,所述 elMTA用户设备 监听所述基站发送的物理下行控制信道指令 PDCCH Order或增强的物理下行 控制信道指令 ePDCCH Order; 或,
在所述第一 TDD上下行配比中的下行子帧集合上,所述 elMTA用户设备 监听所述基站发送的所述 PDCCH Order或 ePDCCH Order。
结合第一方面或第一方面的第一种可能的实现方式或第一方面的第二种 可能的实现方式, 在第三种可能的实现方式中, 所述 elMTA用户设备在所述 确定的上行子帧上向所述基站发送所述随机接入消息 3 之前, 所述方法还包 括:
在所述第一 TDD上下行配比中的下行子帧集合上,所述 elMTA用户设备 监听所述基站通过所述 PDCCH或 ePDCCH发送的采用随机接入的无线网络临 时标识 RA-RNTI加 4尤的下行控制信息 DCI。
结合第一方面或第一方面的第一种可能的实现方式或第一方面的第二种 可能的实现方式或第一方面的第三种可能的实现方式,在第四种可能的实现方 式中, 所述在所述确定的上行子帧上向所述基站发送所述随机接入消息 3 之 后, 所述方法还包括:
在所述第二 TDD上下行配比中的下行子帧集合上,所述 elMTA用户设备 接收所述基站发送的竟争解决消息; 或,
在所述第一 TDD上下行配比中的下行子帧集合上,所述 elMTA用户设备 接收所述基站发送的所述竟争解决消息。
结合第一方面或第一方面的第一种可能的实现方式或第一方面的第二种 可能的实现方式或第一方面的第三种可能的实现方式或第一方面的第四种可 能的实现方式, 在第五种可能的实现方式中, 所述第一信令为系统信息块 1。 第二方面, 提供了一种随机接入方法, 包括:
通过物理共享信道 PDSCH向 elMTA用户设备发送第一信令, 以及通过 物理下行控制信道 PDCCH 或增强的物理下行控制信道 ePDCCH 向所述 elMTA用户设备发送第二信令, 所述第一信令包含第一时分双工 TDD上下行 配比, 所述第二信令包含第二 TDD上下行配比;
接收所述 elMTA用户设备在根据所述第一 TDD上下行配比确定的上行子 帧上发送的随机接入消息 3。
在第一种可能的实现方式中, 所述接收所述 elMTA用户设备在根据所述 第一 TDD上下行配比确定的上行子帧上发送的随机接入消息 3之前, 所述方 法还包括:
在所述第二 TDD上下行配比中的下行子帧集合上,向所述 elMTA用户设 备发送物理下行控制信道指令 PDCCH Order或增强的物理下行控制信道指令 ePDCCH Order; 或,
在所述第一 TDD上下行配比中的下行子帧集合上,向所述 elMTA用户设 备发送所述 PDCCH Order或 ePDCCH Order。
结合第二方面或第二方面的第一种可能的实现方式,在第二种可能的实现 方式中,所述接收所述 elMTA用户设备在根据所述第一 TDD上下行配比确定 的第一上行子帧上发送的随机接入消息 3之前, 所述方法还包括:
在所述第一 TDD上下行配比中的下行子帧集合上, 通过所述 PDCCH或 ePDCCH 向所述 elMTA 用户设备发送采用随机接入的无线网络临时标识 RA-RNTI加 4尤的下行控制信息 DCI。
结合第二方面或第二方面的第一种可能的实现方式或第二方面的第二种 可能的实现方式, 在第三种可能的实现方式中, 所述接收所述 elMTA用户设 备在根据所述第一 TDD上下行配比确定的第一上行子帧上发送的随机接入消 息 3之后, 所述方法还包括:
在所述第二 TDD上下行配比中的下行子帧集合上,向所述 elMTA用户设 备发送竟争解决消息; 或, 在所述第一 TDD上下行配比中的下行子帧集合上,向所述 elMTA用户设 备发送所述竟争解决消息。
结合第二方面或第二方面的第一种可能的实现方式或第二方面的第二种 可能的实现方式或第二方面的第三种可能的实现方式,在第四种可能的实现方 式中, 所述第一信令为系统信息块 1。 第三方面, 提供了一种 elMTA用户设备, 包括:
接收单元, 用于接收基站通过物理下行共享信道 PDSCH发送给 elMTA 用户设备的第一信令, 以及接收所述基站通过物理下行控制信道 PDCCH或增 强的物理下行控制信道 ePDCCH发送给所述 elMTA用户设备的第二信令, 所 述第一信令包含第一时分双工 TDD上下行配比,所述第二信令包含第二 TDD 上下行配比;
确定单元, 用于根据所述第一 TDD上下行配比确定发送随机接入消息 3 的上行子帧;
发送单元,用于在所述确定的上行子帧上向所述基站发送所述随机接入消 息 3。
在第一种可能的实现方式中, 所述发送单元还用于在所述第一 TDD上下 行配比中的上行子帧集合上发送导频 preamble给所述基站。
结合第三方面的第一种可能的实现方式,在第二种可能的实现方式中, 所 述接收单元还用于在所述第二 TDD上下行配比中的下行子帧集合上, 监听所 述基站发送的物理下行控制信道指令 PDCCH Order或增强的物理下行控制信 道指令 ePDCCH Order; 或,
所述接收单元还用于在所述第一 TDD上下行配比中的下行子帧集合上, 监听所述基站发送的所述 PDCCH Order或 ePDCCH Order。
结合第三方面或第三方面的第一种可能的实现方式或第三方面的第二种 可能的实现方式,在第三种可能的实现方式中, 所述接收单元还用于在所述第 一 TDD上下行配比中的下行子帧集合上, 监听所述基站通过所述 PDCCH或 ePDCCH发送的采用随机接入的无线网络临时标识 RA-RNTI加扰的下行控制 信息 DCI。
结合第三方面或第三方面的第一种可能的实现方式或第三方面的第二种 可能的实现方式或第三方面的第三种可能的实现方式,在第四种可能的实现方 式中,所述接收单元还用于在所述第二 TDD上下行配比中的下行子帧集合上, 接收所述基站发送的竟争解决消息; 或,
所述接收单元还用于在所述第一 TDD上下行配比中的下行子帧集合上, 接收所述基站发送的所述竟争解决消息。
结合第三方面或第三方面的第一种可能的实现方式或第三方面的第二种 可能的实现方式或第三方面的第三种可能的实现方式或第三方面的第四种可 能的实现方式, 在第五种可能的实现方式中, 所述第一信令为系统信息块 1。 第四方面, 提供了一种基站, 包括:
发送单元, 用于通过物理共享信道 PDSCH向 elMTA用户设备发送第一 信令, 以及通过物理下行控制信道 PDCCH 或增强的物理下行控制信道 ePDCCH向所述 elMTA用户设备发送第二信令, 所述第一信令包含第一时分 双工 TDD上下行配比, 所述第二信令包含第二 TDD上下行配比;
接收单元,用于接收使能 elMTA用户设备在根据所述第一 TDD上下行配 比确定的上行子帧上发送的随机接入消息 3。
在第一种可能的实现方式中, 所述发送单元还用于在所述第二 TDD上下 行配比中的下行子帧集合上, 向所述 elMTA用户设备发送物理下行控制信道 指令 PDCCH Order或增强的物理下行控制信道指令 ePDCCH Order; 或,
所述发送单元还用于在所述第一 TDD上下行配比中的下行子帧集合上, 向使能 elMTA用户设备发送所述 PDCCH Order或 ePDCCH Order。
结合第四方面或第四方面的第一种可能的实现方式,在第二种可能的实现 方式中, 所述发送单元还用于在所述第一 TDD上下行配比中的下行子帧集合 上, 通过所述 PDCCH或 ePDCCH向所述 elMTA用户设备发送采用随机接入 的无线网络临时标识 RA-RNTI加扰的下行控制信息 DCI。
结合第四方面或第四方面的第一种可能的实现方式或第四方面的第二种 可能的实现方式,在第三种可能的实现方式中, 所述发送单元还用于在所述第 二 TDD上下行配比中的下行子帧集合上,向所述使能 elMTA功能的用户设备 发送竟争解决消息; 或,
所述发送单元还用于在所述第一 TDD上下行配比中的下行子帧集合上, 向所述使能 elMTA功能的用户设备发送所述竟争解决消息。
结合第四方面或第四方面的第一种可能的实现方式或第四方面的第二种 可能的实现方式或第四方面的第三种可能的实现方式,在第四种可能的实现方 式中, 所述第一信令为系统信息块 1。 第五方面, 提供了一种 elMTA用户设备, 包括
接收器, 用于接收基站通过物理下行共享信道 PDSCH发送给 elMTA用 户设备的第一信令, 以及接收所述基站通过物理下行控制信道 PDCCH或增强 的物理下行控制信道 ePDCCH发送给所述 elMTA用户设备的第二信令, 所述 第一信令包含第一时分双工 TDD上下行配比;
处理器, 用于根据所述第一 TDD上下行配比确定发送随机接入消息 3的 上行子帧;
发送器,用于在所述确定的上行子帧上向所述基站发送所述随机接入消息
3。
在第一种可能的实现方式中,所述发送器执行在所述确定的上行子帧上向 所述基站发送所述随机接入消息 3的步骤之前,所述发送器还用于执行如下步 骤:
在所述第一 TDD上下行配比中的上行子帧集合上发送导频 preamble给所 述基站。
结合第五方面的第一种可能的实现方式,在第二种可能的实现方式中, 所 述发送器执行所述在所述第一 TDD上下行配比中的上行子帧集合上发送导频 preamble给所述基站的步骤之前, 所述接收器还用于执行如下步骤:
在所述第二 TDD上下行配比中的下行子帧集合上, 监听所述基站发送的 物理下行控制信道指令 PDCCH Order 或增强的物理下行控制信道指令 ePDCCH Order; 或,
在所述第一 TDD上下行配比中的下行子帧集合上, 监听所述基站发送的 所述 PDCCH Order或 ePDCCH Order。
结合第五方面或第五方面的第一种可能的实现方式或第五方面的第二种 可能的实现方式,在第三种可能的实现方式中, 所述发送器执行所述在所述确 定的上行子帧上向所述基站发送所述随机接入消息 3的步骤之前,所述接收器 还用于执行如下步骤:
在所述第一 TDD上下行配比中的下行子帧集合上, 监听所述基站通过所 述 PDCCH或 ePDCCH发送的采用随机接入的无线网络临时标识 RA-RNTI加 扰的下行控制信息 DCI。
结合第五方面或第五方面的第一种可能的实现方式或第五方面的第二种 可能的实现方式或第五方面的第三种可能的实现方式,在第四种可能的实现方 式中,所述发送器执行所述在所述确定的上行子帧上向所述基站发送所述随机 接入消息 3的步骤之后, 所述接收器还用于执行如下步骤:
在所述第二 TDD上下行配比中的下行子帧集合上, 接收所述基站发送的 竟争解决消息; 或,
在所述第一 TDD上下行配比中的下行子帧集合上, 接收所述基站发送的 所述竟争解决消息。
结合第五方面或第五方面的第一种可能的实现方式或第五方面的第二种 可能的实现方式或第五方面的第三种可能的实现方式或第五方面的第四种可 能的实现方式, 在第五种可能的实现方式中, 所述第一信令为系统信息块 1。 第六方面, 提供了一种基站, 包括:
发送器, 用于通过物理共享信道 PDSCH向 elMTA用户设备发送第一信 令, 以及通过物理下行控制信道 PDCCH或增强的物理下行控制信道 ePDCCH 向所述 elMTA用户设备发送第二信令, 所述第一信令包含第一时分双工 TDD 上下行配比, 所述第二信令包含第二 TDD上下行配比;
接收器,用于接收所述 elMTA用户设备在根据所述第一 TDD上下行配比 确定的上行子帧上发送的随机接入消息 3。
在第一种可能的实现方式中, 所述接收器执行所述接收所述 elMTA用户 设备在根据所述第一 TDD上下行配比确定的上行子帧上发送的随机接入消息 3的步骤之前, 所述发送器还用于执行如下步骤:
在所述第二 TDD上下行配比中的下行子帧集合上,向所述 elMTA用户设 备发送物理下行控制信道指令 PDCCH Order或增强的物理下行控制信道指令 ePDCCH Order; 或,
在所述第一 TDD上下行配比中的下行子帧集合上,向所述 elMTA用户设 备发送所述 PDCCH Order或 ePDCCH Order。
结合第六方面或第六方面的第一种可能的实现方式,在第二种可能的实现 方式中,所述接收执行所述接收所述 elMTA用户设备在根据所述第一 TDD上 下行配比确定的第一上行子帧上发送的随机接入消息 3的步骤之前,所述发送 器还用于执行如下步骤:
在所述第一 TDD上下行配比中的下行子帧集合上, 通过所述 PDCCH或 ePDCCH 向所述 elMTA 用户设备发送采用随机接入的无线网络临时标识 RA-RNTI加 4尤的下行控制信息 DCI。
结合第六方面或第六方面的第一种可能的实现方式或第六方面的第二种 可能的实现方式,在第三种可能的实现方式中, 所述接收器执行所述接收所述 elMTA用户设备在根据所述第一 TDD上下行配比确定的第一上行子帧上发送 的随机接入消息 3的步骤之后, 所述发送器还用于执行如下步骤:
在所述第二 TDD上下行配比中的下行子帧集合上,向所述 elMTA用户设 备发送竟争解决消息; 或,
在所述第一 TDD上下行配比中的下行子帧集合上,向所述 elMTA用户设 备发送所述竟争解决消息。
结合第六方面或第六方面的第一种可能的实现方式或第六方面的第二种 可能的实现方式或第六方面的第三种可能的实现方式,在第四种可能的实现方 式中, 所述第一信令为系统信息块 1。 采用本发明提供的一种随机接入方法及相关装置的技术方案, 通过使非 elMTA用户设备和 elMTA用户设备都统一采用物理下行共享信道发送的信令 地接收到非 elMTA用户设备和 elMTA用户设备发送的随机接入消息 3。 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的 前提下, 还可以根据这些附图获得其他的附图。 图 la 为竟争模式的随机接入过程的流程图;
图 lb为非竟争模式的随机接入过程的流程图;
图 2为本发明一种随机接入方法的第一实施例的流程图;
图 3为本发明一种随机接入方法的第二实施例的流程图;
图 4为本发明一种随机接入方法的第三实施例的流程图;
图 5为本发明一种随机接入方法的第四实施例的流程图;
图 6为本发明一种随机接入方法的第五实施例的流程图;
图 7为本发明一种随机接入方法的第六实施例的流程图;
图 8为本发明一种随机接入方法的第七实施例的流程图;
图 9为本发明一种随机接入方法的第八实施例的流程图;
图 10为本发明一种用户设备的第一实施例的结构示意图;
图 11为本发明一种用户设备的第二实施例的结构示意图;
图 12为本发明一种用户设备的第三实施例的结构示意图;
图 13为本发明一种用户设备的第四实施例的结构示意图;
图 14为本发明一种基站的第一实施例的结构示意图;
图 15为本发明一种基站的第二实施例的结构示意图;
图 16为本发明一种基站的第三实施例的结构示意图;
图 17为本发明一种基站的第四实施例的结构示意图;
图 18为本发明一种用户设备的第五实施例的结构示意图;
图 19为本发明一种基站设备的一个实施例的结构示意图。 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。
现有 LTE TDD系统有七种配比, 具体请参见下表 1 , 其中 D代表下行, U代 表上行, S 代表特殊子帧, 特殊子帧里面包括下行导频时隙 ( Downlink Pilot Time Slot, DWPTS ) , 保护时隙( Guard Period, GP )和上行导频时隙( Uplink Pilot Time Slot, UPPTS ) 。 表 1 : 上下行配比
Figure imgf000013_0001
LTE TDD 系统随机接入过程包括竟争模式的随机过程和非竟争模式的 随机过程, 竟争模式的随机接入过程如图 la所示, 非竟争模式的随机接入过 程的示意图如图 lb所示。 竟争随机接入过程包括, UE发送随机接入消息 1 (可以筒写为 Msgl ) , 也就是 preamble。 在 eNodeB正确接收到该 preamble 后,就发送随机接入消息 2 (可以筒写为 Msg2 ) ,也就是随机接入响应( RACH response, RAR ) ,随机接入响应包括:时间提前量,随机接入响应授权( random access response grant, 用于指示后面的 Msg3的发送信息) , 分配的临时用户 标识( temporary C-RNTI ) 。 UE在正确接收 Msg2后, UE在 Msg2中的随机 接入响应授权所指示的物理上行共享信道 (Physical Uplink Share Channel , PUSCH)上发送 Msg3 ,在初始化随机接入过程中, Msg3是 RRC连接请求( RRC connection request ),在无线链路失败后启动的随机接入过程消息 3可以是 RRC 连接重建请求 ( RRC connection reestablishment request ) , 也可以是资源请求 MAC层控制元素 (Medium access control control element, MAC CE),也可以是 切换确认消息; eNB 在正确接收 Msg3 后, 在物理下行共享信道 (Physical Downlink Share Channel , PDSCH)上给 UE返回随机接入消息 4(筒称 Msg4) , 接入消息 4可以是沖突检测消息等。非竟争式的随机接入过程与竟争的随机接 入过程相比, 由于没有竟争, 所以也不存在消息 3和竟争解决消息, 另外, 非 竟争式的随机接入过程还包括随机接入消息 0(Msg0), MsgO可以是下行控制 信道指令 ((e)PDCCH order) , 也可以是切换命令, 该 (e)PDCCH order 包括 preamble序歹1 J号等。
图 2为本发明一种随机接入方法的第一实施例的流程图。如图 2所示, 该 方法包括以下步骤: 步骤 S101 , elMTA用户设备接收基站通过物理下行共享信道 PDSCH发 送给 elMTA用户设备的第一信令, 以及接收所述基站通过物理下行控制信道 PDCCH或增强的物理下行控制信道 ePDCCH发送给所述 elMTA用户设备的 第二信令, 所述第一信令包含第一时分双工 TDD上下行配比, 所述第二信令 包含第二 TDD上下行配比。
对于 elMTA用户设备和非 elMTA用户设备, 均可以通过 PDSCH接收到 基站发送的第一信令, 该第一信令可以是 SIB1。 在该第一信令中包含了第一 TDD上下行配比, 该第一 TDD上下行配比是半静态配置的。
对于 elMTA用户设备, 还可以通过 (e)PDCCH接收到基站发送的第二信 令。在该第二信令中包含了第二 TDD上下行配比,该第二 TDD上下行配比是 可以动态改变的, 例如 10ms ~ 40ms改变一次上下行配比。
第一 TDD上下行配比和第二 TDD上下行配比中包含的子帧类型、配比规 则还是采用如表 1所示的上下行配比。
步骤 S102, 所述 elMTA用户设备根据所述第一 TDD上下行配比确定发 送随机接入消息 3的上行子帧。
关于发送 Msg3的上行子帧的规定是: 假设在子帧 n收到随机接入响应, 那么在第一个上行子帧 n+kl上发送 Msg3, 其中 kl>=6, 子帧的标号为 0 ~ 9; 当随机接入响应授权中上行延迟域值为 0, 那么子帧 n+kl是第一个可用的上 行子帧 ( available UL subframe ) , 当随机接入响应授权中上行延迟域值为 1 , 那么在子帧 n+kl之后的第一可用的上行子帧上发送 Msg3。
对于非 elMTA用户设备,当然还是根据第一 TDD上下行配比发送 Msg3。 但是, elMTA用户不按照 (e)PDCCH里面通知的 TDD上下行配比来确定 n+kl , 或者说来确定发送 Msg3的子帧, 而是按照 SIB1 中通知的 TDD配比来确定 n+kl , 或者说来确定发送 Msg3的子帧。
步骤 S103, 所述 elMTA用户设备在所述确定的上行子帧上向所述基站发 送所述随机接入消息 3。
elMTA用户设备在上述确定的上行子帧上向基站发送 Msg3。 采用本实施 例的技术方案,由于基站知道非 elMTA用户设备和 elMTA用户设备都统一采 用根据 SIB1通知的上下行配比确定的上行子帧来发送 Msg3, 因此,基站能准 确地接收到非 elMTA用户设备和 elMTA用户设备发送的 Msg3, 保持了 R12 版本之前的非 elMTA用户设备的向后兼容性。
根据本发明实施例提供的一种随机接入方法, 通过使非 elMTA用户设备 和 elMTA用户设备都统一采用物理下行共享信道发送的信令中包含的上下行 配比确定的上行子帧来发送随机接入消息 3 , 使得基站能准确地接收到非 elMTA用户设备和 elMTA用户设备发送的随机接入消息 3。
图 3为本发明一种随机接入方法的第二实施例的流程图。如图 3所示, 该 方法包括以下步骤:
步骤 S201 , elMTA用户设备接收基站通过物理下行共享信道 PDSCH发 送给 elMTA用户设备的第一信令, 以及接收所述基站通过物理下行控制信道 PDCCH或增强的物理下行控制信道 ePDCCH发送给所述 elMTA用户设备的 第二信令, 所述第一信令包含第一时分双工 TDD上下行配比, 所述第二信令 包含第二 TDD上下行配比。
步骤 S201的具体实现过程与上述实施例的步骤 S101相同,在此不再赘述。 步骤 S202 ,在所述第二 TDD上下行配比中的下行子帧集合上,所述 elMTA 用户设备监听所述基站发送的物理下行控制信道指令 PDCCH Order或增强的 物理下行控制信道指令 ePDCCH Order。
UE可以按照通过 (e)PDCCH发送的信令中通知的 TDD上下行配比来监听 (e)PDCCH Order, 具体的, 在通过 (e)PDCCH发送的信令通知的 TDD配比中 的下行子帧或特殊子帧来监听 (e)PDCCH order。 这样, 由于 (e)PDCCH发送的 信令中通知的 TDD配比中可用的下行子帧比 SIB 1中通知的 TDD配比中可用 的下行子帧多, 可以让 UE有更多的机会来接收 (e)PDCCH Order, 减少随机接 入时延, 提高基站调度灵活性。 可选的, UE也可以是按照通过 PDSCH发送 的消息中通知的 TDD配比来监听基站发送的 (e)PDCCH Order, 该消息可以是 SIBL
在本发明实施例中, 下行子帧集合可以包括特殊子帧。 当 UE 通过
(e)PDCCH发送的信令通知的 TDD配比中的特殊子帧监听 (e)PDCCH Order时, 如果通过 (e)PDCCH发送的信令通知的 TDD配比中指示的对应的子帧类型为 下行子帧, 则 UE可以按照下行子帧类型来接收其它下行数据。 该情况适应于 下面涉及的在特殊子帧监听基站发送的其它消息。
由于 (e)PDCCH order是基站发给连接态的 UE, 触发其进行随机接入的, 所以基站通常知道该 UE是否是 elMTA用户, 以及当 UE是 elMTA用户时, 是否采用(e)PDCCH发送的信令中通知的 TDD上下行配比。
步骤 S203 , 所述 elMTA用户设备在所述第一 TDD上下行配比中的上行 子帧集合上发送导频 preamble给所述基站。
由于基站尚不知道发送 preamble的是非 elMTA用户设备或 elMTA用户 设备, 统一采用根据 SIB1 通知的 TDD 上下行配比中的上行子帧来发送 preamble , 可以保证基站准确地接收到用户设备发送的 preamble。
当基站发送 (e)PDCCH order 给 UE , 该(e)PDCCH order 里面会携带 preamble序号, 现有协议的规定为: 用户在子帧 n收到 (e)PDCCH order, 那么 在 n+k2子帧上的可用的随机接入资源上发送 preamble, k2>=6。
值得说明的是, 执行步骤 S203之前并不一定先执行步骤 S202, 也可以由 用户设备自身触发随机接入过程。
值得说明的是, 执行步骤 S203时, 发送的 preamble或者使用的物理随机 接入信道 (PhysicalRandom Access Channel, PRACH )资源可以是现有技术中为 UE可以使用的 preamble或者 PRACH资源, 此时, 基站仅通过 PRACH资源 不能清楚 UE是否是 elMTA UE,也不能仅通过 preamble来区别执行竟争随机 接入过程的 UE是否是 eIMTA UE。 或者,执行步骤 S203时,发送的 preamble 或者使用的 PRACH 资源可以是 elMTA UE可以使用其它 UE 不能使用的 preamble或者 PRACH资源,此时基站仅通过 PRACH资源或 preamble就能区 别执行竟争随机接入过程的 UE是否是 elMTA UE。
所述 elMTA UE可以使用其它 UE不能使用的 preamble或者 PRACH资源 可以是新的 preamble或者 PRACH资源,或者将原有的前导码集合中预留出一 部分前导码, 具体方法可以在步骤 203之前, 通过系统广播消息, 专用 RRC 消息或者物理层信令, MAC层信令等方式配置给 elMTA UE。 这样做的好处 是能让基站更早的识别出 elMTA UE, 从而减少随机接入时延, 提高基站调度 灵活性。
步骤 S204 ,在所述第一 TDD上下行配比中的下行子帧集合上,所述 elMTA 用户设备监听所述基站通过所述 PDCCH或 ePDCCH发送的采用随机接入的无 线网络临时标识 RA-RNTI加扰的下行控制信息 DCI。
由于基站在接收到 preamble后, 不清楚 UE是否是 elMTA UE, 所以按照 SIB1通知的 TDD配比对应的下行子帧或特殊子帧监听采用 RA-RNTI加扰的 DCI, 能确保所有 UE都能正确接收。
可以理解的,对于非竟争随机接入过程或者在步骤 203中发送的 preamble 或者使用的 PRACH资源是 elMTA UE可以使用其它 UE不能使用的 preamble 或者 PRACH资源,基站接收到 preamble后,可以知道 UE是否是 elMTA UE, 以及当 UE是 elMTA用户时, 是否采用(e)PDCCH发送的信令中通知的 TDD 上下行配比。所以对于非竟争随机接入过程或者在步骤 204中发送的 preamble 或者使用的 PRACH资源是 elMTA UE可以使用其它 UE不能使用的 preamble 或者 PRACH资源,步骤 S204也可以替换为在所述第二 TDD上下行配比中的 下行子帧集合上, 监听所述基站通过所述 (e)PDCCH发送的采用随机接入的无 线网络临时标识 RA-RNTI加扰的下行控制信息 DCI。这样,由于通过 (e)PDCCH 发送的信令中通知的 TDD上下行配比中可用的下行子帧比 SIB中通知的 TDD 配比中可用的下行子帧多, 可以让 UE有更多的机会来接收该 DCI, 减少随机 接入时延, 提高基站调度灵活性。 当然, 对于非竟争随机接入过程或者在步骤 203中发送的 preamble或者使用的 PRACH资源是 elMTA UE可以使用其它 UE不能使用的 preamble或者 PRACH资源, 也可以按照原步骤 S204的方式 接收所述 DCI。
同样可以理解的, 对于非竟争随机接入过程, 步骤 S205~步骤 S207不存 在。
步骤 S205 , 所述 elMTA用户设备根据所述第一 TDD上下行配比确定发 送随机接入消息 3的上行子帧。
步骤 S206, 所述 elMTA用户设备在所述确定的上行子帧上向所述基站发 送所述随机接入消息 3。
步骤 S205和步骤 S206的具体实现过程分别与上述实施例的步骤 S102和 步骤 S103相同, 在此不再赘述。
步骤 S207 , 所述 elMTA用户设备在所述第二 TDD上下行配比中的下行 子帧集合上, 接收所述基站发送的竟争解决消息。
由于基站接收到 UE发送的随机接入消息 3后, 已经识别出 UE是 elMTA 用户设备还是非 elMTA用户设备, 以及当 UE是 elMTA用户时, 是否使用通 过 (e)PDCCH发送的信令中通知的 TDD上下行配比, 所以优选的, UE根据通 过 (e)PDCCH发送的信令中通知的 TDD上下行配比来监听竟争解决消息。 这 样, 由于通过 (e)PDCCH发送的信令中通知的 TDD上下行配比中可用的下行 子帧比 SIB中通知的 TDD配比中可用的下行子帧多, 可以让 UE有更多的机 会来接收该竟争解决消息, 减少随机接入时延, 提高基站调度灵活性。
可选的, UE也可以按照 SIB1通知的 TDD上下行配比来监听竟争解决消 根据本发明实施例提供的一种随机接入方法, 通过使非 elMTA用户设备 和 elMTA用户设备都统一采用物理下行共享信道发送的信令中包含的上下行 配比确定的上行子帧来接收和发送随机接入过程中的各消息,使得基站能准确 地接收到非 elMTA用户设备和 elMTA用户设备发送的随机接入消息,也减少 了 elMTA用户设备按第二 TDD上下行配比确定随机接入消息 3发送时刻并发 送随机接入消息 3 带来的功率开销和上行干扰问题; 且可以减少随机接入时 延, 提高基站调度灵活性。
图 4为本发明一种随机接入方法的第三实施例的流程图。如图 4所示, 该 方法包括以下步骤:
步骤 S301 ,通过物理共享信道 PDSCH向 elMTA用户设备发送第一信令, 以及通过物理下行控制信道 PDCCH或增强的物理下行控制信道 ePDCCH向所 述 elMTA用户设备发送第二信令,所述第一信令包含第一时分双工 TDD上下 行配比, 所述第二信令包含第二 TDD上下行配比。
基站在正确接收到随机接入消息 3之前并不知道发送随机接入消息 3之前 的各消息是 elMTA用户设备或非 elMTA用户设备, 但基站可以通过 PDSCH 向 elMTA用户设备和非 elMTA用户设备发送第一信令, 该第一信令可以是 SIBL 在该第一信令中包含了第一 TDD上下行配比, 该第一 TDD上下行配 比是半静态配置的。
对于 elMTA用户设备, 还可以通过 (e)PDCCH接收到基站发送的第二信 令。 所以,基站通过 (e)PDCCH向 elMTA用户设备发送该第二信令。 在该第二 信令中包含了第二 TDD上下行配比,该第二 TDD上下行配比是可以动态改变 的, 例如 10ms ~ 40ms改变一次上下行配比。
第一 TDD上下行配比和第二 TDD上下行配比中包含的子帧类型、配比规 则还是采用如表 1所示的上下行配比。 步骤 S302, 接收所述 elMTA用户设备在根据所述第一 TDD上下行配比 确定的上行子帧上发送的随机接入消息 3。
对于非 elMTA用户设备,当然还是根据第一 TDD上下行配比发送 Msg3。 但是, elMTA用户不按照 (e)PDCCH里面通知的 TDD上下行配比来确定发送 Msg3的子帧, 而是按照 SIB1中通知的 TDD配比来确定发送 Msg3的子帧。 因此, 对于无论是非 elMTA用户设备还是 elMTA用户设备, 基站在根据第一 TDD上下行配比确定的上行子帧上都可以准确接收到它们发送的 Msg3。
采用本实施例的技术方案, 由于基站知道非 elMTA用户设备和 elMTA用 户设备都统一采用根据 SIB1通知的上下行配比确定的上行子帧来发送 Msg3, 因此, 基站能准确地接收到非 elMTA 用户设备和 elMTA 用户设备发送的 Msg3, 保持了 R12版本之前的非 elMTA用户设备的向后兼容性。
根据本发明实施例提供的一种随机接入方法, 通过使非 elMTA用户设备 和 elMTA用户设备都统一采用物理下行共享信道发送的信令中包含的上下行 配比确定的上行子帧来发送随机接入消息 3 , 从而基站能准确地接收到非 elMTA用户设备和 elMTA用户设备发送的随机接入消息 3。
图 5为本发明一种随机接入方法的第四实施例的流程图。如图 5所示, 该 方法包括以下步骤:
步骤 S401 ,通过物理共享信道 PDSCH向 elMTA用户设备发送第一信令, 以及通过物理下行控制信道 PDCCH或增强的物理下行控制信道 ePDCCH向所 述 elMTA用户设备发送第二信令,所述第一信令包含第一时分双工 TDD上下 行配比, 所述第二信令包含第二 TDD上下行配比。
步骤 S401的具体实现过程与上述实施例的步骤 S301相同,在此不再赘述。 步骤 S402, 在所述第二 TDD 上下行配比中的下行子帧集合上, 向所述 elMTA用户设备发送物理下行控制信道指令 PDCCH Order或增强的物理下行 控制信道指令 ePDCCH Order。
基站在第二 TDD上下行配比中的下行子帧集合上向 elMTA用户设备发送 (e)PDCCH Order, 这样, 由于 (e)PDCCH发送的信令中通知的 TDD配比中可 用的下行子帧比 SIB 1中通知的 TDD配比中可用的下行子帧多,可以让 UE有 更多的机会来接收 (e)PDCCH Order,减少随机接入时延,提高基站调度灵活性。 可选的,基站也可以是在第一 TDD上下行配比的下行子帧集合上向 elMTA用 户设备发送 (e)PDCCH Order。
在本发明实施例中,下行子帧集合可以包括特殊子帧。当基站在第二 TDD 上下行配比中的下行子帧集合上向 elMTA用户设备发送 (e)PDCCH Order时, TDD上下行配比中可以指示的对应的子帧类型为下行子帧, 则 UE可以按照 下行子帧类型来接收其它下行数据。该情况适应于下面涉及的在特殊子帧监听 基站发送的其它消息。
步骤 S403, 在所述第一 TDD上下行配比中的下行子帧集合上, 通过所述 PDCCH或 ePDCCH向所述 elMTA用户设备发送采用随机接入的无线网络临 时标识 RA-RNTI加 4尤的下行控制信息 DCI。
基站在接收到 UE发送的 preamble后,仍然不清楚 UE是否是 elMTA UE, 所以在 SIB1通知的 TDD配比对应的下行子帧或特殊子帧上向 UE发送采用 RA-RNTI加扰的 DCI, 能确保所有 UE都能正确接收。
步骤 S404, 接收所述 elMTA用户设备在根据所述第一 TDD上下行配比 确定的上行子帧上发送的随机接入消息 3。
步骤 S404的具体实现过程与上述实施例的步骤 S302相同,在此不再赘述。 步骤 S405, 在所述第二 TDD 上下行配比中的下行子帧集合上, 向所述 elMTA用户设备发送竟争解决消息。
由于基站接收到 UE发送的随机接入消息 3后, 已经识别出 UE是 elMTA 用户设备还是非 elMTA用户设备, 以及当 UE是 elMTA用户时, 是否使用通 过 (e)PDCCH发送的信令中通知的 TDD上下行配比, 所以优选的, 基站在第 二 TDD上下行配比中的下行子帧集合上,向 elMTA用户设备发送竟争解决消 息。 这样, 由于通过 (e)PDCCH发送的信令中通知的 TDD上下行配比中可用 的下行子帧比 SIB中通知的 TDD配比中可用的下行子帧多, 可以让 UE有更 多的机会来接收该竟争解决消息, 减少随机接入时延, 提高基站调度灵活性。
可选的, 基站也可以在第一 TDD 上下行配比中的下行子帧集合上, 向 elMTA用户设备发送竟争解决消息。
根据本发明实施例提供的一种随机接入方法, 通过使非 elMTA用户设备 和 elMTA用户设备都统一采用物理下行共享信道发送的信令中包含的上下行 配比确定的上行子帧来接收和发送随机接入过程中的各消息,从而基站能准确 地接收到非 elMTA用户设备和 elMTA用户设备发送的随机接入消息;且可以 减少随机接入时延, 提高基站调度灵活性。
图 6为本发明一种随机接入方法的第五实施例的流程图。如图 6所示, 该 方法包括以下步骤:
步骤 501 , elMTA 用户设备通过基站预先配置的物理随机接入信道 PRACH向所述基站发送导频或向所述基站发送所述基站预先配置的导频或导 频集合中的预留导频。
步骤 S502, 所述 elMTA用户设备接收所述基站通过物理下行控制信道 PDCCH或增强的物理下行控制信道 ePDCCH发送的信令,所述信令包含时分 双工 TDD上下行配比。
步骤 S503, 所述 elMTA用户设备根据所述 TDD上下行配比确定发送随 机接入消息 3的上行子帧。
步骤 S504, 所述 elMTA用户设备在所述确定的上行子帧上向所述基站发 送所述随机接入消息 3。
基站为 elMTA UE配置新的 PRACH资源, 或者新的前导码, 或者将原有 的前导码集合中预留出一部分前导码。
这样, elMTA UE使用所述新的 PRACH资源, 或者新的前导码, 或者将 原有的前导码集合中预留出一部分前导码进行随机接入过程时,基站通知所述 PRACH资源, 或者新的前导码, 或者将原有的前导码集合中预留出一部分前 导码判断出 UE是 elMTA UE。 从而在接收随机接入消息 3 时, 可以按照 (e)PDCCH信令通知的 TDD配比来接收, 因为 (e)PDCCH信令通知的 TDD配 比代表最适合系统性能的配比, 所以使用所述 (e)PDCCH信令通知的 TDD配 比来执行随机接入过程, 能提升随机接入过程的性能。 而对于非 elMTA UE则 按照 SIB1通知的 TDD上下行配比来接收随机接入消息 3,可以使基站准确接 收到 elMTA用户设备和非 elMTA用户设备发送的随机接入消息 3。
可以理解的, 所述新的 PRACH资源, 或者新的前导码, 或者将原有的 前导码集合中预留出一部分前导码可以通过系统广播消息, 专用 RRC消息或 者物理层信令, MAC层信令等方式配置给 UE。
根据本发明实施例提供的一种随机接入方法,通过根据基站预先配置的新 的 PRACH资源, 或者新的前导码, 或者将原有的前导码集合中预留出一部分 前导码向基站发送前导码,可以使基站判断出该用户设备为 elMTA用户设备, 从而使基站准确接收到 elMTA用户设备和非 elMTA用户设备发送的随机接入 消息 3。
图 7为本发明一种随机接入方法的第六实施例的流程图。如图 7所示, 该 方法包括以下步骤:
步骤 S601 , elMTA用户设备接收基站通过预定方式发送的配置通知, 所 述配置通知包括以下任一种: 预先配置的物理随机接入信道 PRACH、 预先配 置的导频或导频集合中的预留导频。
步骤 S602, 所述 elMTA用户设备通过所述 PRACH向所述基站发送导频 或向所述基站发送所述预先配置的导频或导频集合中的预留导频。
步骤 S603 , 所述 elMTA用户设备接收所述基站通过物理下行控制信道
PDCCH或增强的物理下行控制信道 ePDCCH发送的信令,所述信令包含时分 双工 TDD上下行配比。
步骤 S604, 所述 elMTA用户设备在所述 TDD上下行配比的下行子帧集 合上, 接收所述基站发送的随机接入响应消息。
步骤 S605, 所述 elMTA用户设备根据所述 TDD上下行配比确定发送随 机接入消息 3的上行子帧。
步骤 S606, 所述 elMTA用户设备在所述确定的上行子帧上向所述基站发 送所述随机接入消息 3。
步骤 S607, 在所述 TDD上下行配比的下行子帧集合上, 所述 elMTA用 户设备接收所述基站发送的竟争解决消息。
本实施例与上述实施例的区别在于, 基站根据所述新的 PRACH资源, 或 者新的前导码,或者将原有的前导码集合中预留出一部分前导码判断出 UE是 elMTA UE。 从而在后面的随机接入响应消息, 以及随机接入消息 3及竟争解 决消息, 都可以按照 (e)PDCCH信令通知的 TDD配比来发送或接收。
根据本发明实施例提供的一种随机接入方法,通过根据基站预先配置的新 的 PRACH资源, 或者新的前导码, 或者将原有的前导码集合中预留出一部分 前导码向基站发送前导码,可以使基站判断出该用户设备为 elMTA用户设备, 从而使基站准确接收到 elMTA用户设备和非 elMTA用户设备发送的随机接入 消息 3; 且可以减少随机接入时延, 提高基站调度灵活性。
图 8为本发明一种随机接入方法的第七实施例的流程图。如图 8所示, 该 方法包括以下步骤:
步骤 S701 , 接收用户设备发送的预先配置的导频或导频集合中的预留导 频或通过预先配置的物理随机接入信道 PRACH发送的导频。
步骤 S702, 确定所述用户设备为 elMTA用户设备。
步骤 S703, 通过物理下行控制信道 PDCCH或增强的物理下行控制信道 ePDCCH向所述 elMTA用户设备发送信令,所述信令包含时分双工 TDD上下 行配比。
步骤 S704, 在所述 elMTA用户设备根据所述 TDD上下行配比确定的上 行子帧上, 接收所述 elMTA用户设备发送的随机接入消息 3。
基站为 elMTA UE配置新的 PRACH资源, 或者新的前导码, 或者将原有 的前导码集合中预留出一部分前导码。
这样, elMTA UE使用所述新的 PRACH资源, 或者新的前导码, 或者将 原有的前导码集合中预留出一部分前导码进行随机接入过程时,基站通知所述 PRACH资源, 或者新的前导码, 或者将原有的前导码集合中预留出一部分前 导码判断出 UE是 elMTA UE。 从而在接收随机接入消息 3 时, 可以按照 (e)PDCCH信令通知的 TDD配比来接收, 因为 (e)PDCCH信令通知的 TDD配 比代表最适合系统性能的配比, 所以使用所述 (e)PDCCH信令通知的 TDD配 比来执行随机接入过程, 能提升随机接入过程的性能。 而对于非 elMTA UE则 按照 SIB1通知的 TDD上下行配比来接收随机接入消息 3,可以使基站准确接 收到 elMTA用户设备和非 elMTA用户设备发送的随机接入消息 3。
可以理解的, 所述新的 PRACH资源, 或者新的前导码, 或者将原有的 前导码集合中预留出一部分前导码可以通过系统广播消息, 专用 RRC消息或 者物理层信令, MAC层信令等方式配置给 UE。
根据本发明实施例提供的一种随机接入方法,通过根据基站预先配置的新 的 PRACH资源, 或者新的前导码, 或者将原有的前导码集合中预留出一部分 前导码向基站发送前导码,可以使基站判断出该用户设备为 elMTA用户设备, 从而使基站准确接收到 elMTA用户设备和非 elMTA用户设备发送的随机接入 消息 3。
图 9为本发明一种随机接入方法的第八实施例的流程图。如图 9所示, 该 方法包括以下步骤: 步骤 S801 , 通过预定方式向 elMTA用户设备发送配置通知, 所述配置通 知包括以下任一种: 预先配置的物理随机接入信道 PRACH、 预先配置的导频 或导频集合中的预留导频。
步骤 S802, 接收所述 elMTA用户设备发送的所述预先配置的导频或导频 集合中的预留导频或通过所述 PRACH发送的导频。
步骤 S803 , 确定所述用户设备为 elMTA用户设备。
步骤 S804, 通过物理下行控制信道物理下行控制信道 PDCCH或增强的 物理下行控制信道 ePDCCH向所述 elMTA用户设备发送信令, 所述信令包含 时分双工 TDD上下行配比。
步骤 S805, 在所述 TDD上下行配比的下行子帧集合上, 向所述 elMTA 用户设备发送随机接入响应消息。
步骤 S806, 在所述 elMTA用户设备根据所述 TDD上下行配比确定的上 行子帧上, 接收所述 elMTA用户设备发送的随机接入消息 3。
步骤 S807, 在所述 TDD上下行配比的下行子帧集合上, 向所述 elMTA 用户设备发送竟争解决消息。
本实施例与上述实施例的区别在于, 基站根据所述新的 PRACH资源, 或 者新的前导码,或者将原有的前导码集合中预留出一部分前导码判断出 UE是 elMTA UE。 从而在后面的随机接入响应消息, 以及随机接入消息 3及竟争解 决消息, 都可以按照 (e)PDCCH信令通知的 TDD配比来发送或接收。
根据本发明实施例提供的一种随机接入方法,通过根据基站预先配置的新 的 PRACH资源, 或者新的前导码, 或者将原有的前导码集合中预留出一部分 前导码向基站发送前导码,可以使基站判断出该用户设备为 elMTA用户设备, 从而使基站准确接收到 elMTA用户设备和非 elMTA用户设备发送的随机接入 消息 3; 且可以减少随机接入时延, 提高基站调度灵活性。
图 10为本发明一种用户设备的第一实施例的结构示意图。 如图 10所示, 该用户设备 1000包括:
接收单元 11 ,用于接收基站通过物理下行共享信道 PDSCH发送给 elMTA 用户设备的第一信令, 以及接收所述基站通过物理下行控制信道 PDCCH或增 强的物理下行控制信道 ePDCCH发送给所述 elMTA用户设备的第二信令, 所 述第一信令包含第一时分双工 TDD上下行配比,所述第二信令包含第二 TDD 上下行配比。
对于 elMTA用户设备和非 elMTA用户设备, 均可以通过 PDSCH接收到 基站发送的第一信令, 该第一信令可以是 SIB1。 在该第一信令中包含了第一 TDD上下行配比, 该第一 TDD上下行配比是半静态配置的。
对于 elMTA用户设备, 第二接收单元 12还可以通过 (e)PDCCH接收到基 站发送的第二信令。在该第二信令中包含了第二 TDD上下行配比,该第二 TDD 上下行配比是可以动态改变的, 例如 10ms ~ 40ms改变一次上下行配比。
第一 TDD上下行配比和第二 TDD上下行配比中包含的子帧类型、配比规 则还是采用如表 1所示的上下行配比。
确定单元 12, 用于根据所述第一 TDD上下行配比确定发送随机接入消息
3的上行子帧。
关于发送 Msg3的上行子帧的规定是: 假设在子帧 n收到随机接入响应, 那么在第一个上行子帧 n+kl上发送 Msg3, 其中 kl>=6, 子帧的标号为 0 ~ 9; 当随机接入响应授权中上行延迟域值为 0, 那么子帧 n+kl是第一个可用的上 行子帧 (available UL subframe ), 当随机接入响应授权中上行延迟域值为 1 , 那么在子帧 n+kl之后的第一可用的上行子帧上发送 Msg3。
对于非 elMTA用户设备,当然还是根据第一 TDD上下行配比发送 Msg3。 但是, elMTA用户的确定单元 13不按照 (e)PDCCH里面通知的 TDD上下行配 比来确定 n+kl ,或者说来确定发送 Msg3的子帧,而是按照 SIB1中通知的 TDD 配比来确定 n+kl , 或者说来确定发送 Msg3的子帧。
发送单元 13, 用于在所述确定的上行子帧上向所述基站发送所述随机接 入消息 3。
elMTA用户设备的第一发送单元 14在上述确定的上行子帧上向基站发送 Msg3。 采用本实施例的技术方案, 由于基站知道非 elMTA用户设备和 elMTA 用户设备都统一采用根据 SIB1 通知的上下行配比确定的上行子帧来发送 Msg3, 因此, 基站能准确地接收到非 elMTA用户设备和 elMTA用户设备发 送的 Msg3, 保持了 R12版本之前的非 elMTA用户设备的向后兼容性。
根据本发明实施例提供的一种用户设备, 通过使非 elMTA 用户设备和 elMTA用户设备都统一采用物理下行共享信道发送的信令中包含的上下行配 比确定的上行子帧来发送随机接入消息 3,使得基站能准确地接收到非 elMTA 用户设备和 elMTA用户设备发送的随机接入消息 3。
图 11为本发明一种用户设备的第二实施例的结构示意图。 如图 11所示, 该用户设备 2000包括:
接收单元 21 ,用于接收基站通过物理下行共享信道 PDSCH发送给 elMTA 用户设备的第一信令, 以及接收所述基站通过物理下行控制信道 PDCCH或增 强的物理下行控制信道 ePDCCH发送给所述 elMTA用户设备的第二信令, 所 述第一信令包含第一时分双工 TDD上下行配比,所述第二信令包含第二 TDD 上下行配比。
接收单元 21还用于在所述第二 TDD上下行配比中的下行子帧集合上,监 听所述基站发送的物理下行控制信道指令 PDCCH Order或增强的物理下行控 制信道指令 ePDCCH Orde。
接收单元 21可以按照通过 (e)PDCCH发送的信令中通知的 TDD上下行配 比来监听 (e)PDCCH Order, 具体的,在通过 (e)PDCCH发送的信令通知的 TDD 配比中的下行子帧或特殊子帧来监听 (e)PDCCH order。 这样, 由于 (e)PDCCH 发送的信令中通知的 TDD配比中可用的下行子帧比 SIB1中通知的 TDD配比 中可用的下行子帧多, 可以让 UE有更多的机会来接收 (e)PDCCH Order, 减少 随机接入时延, 提高基站调度灵活性。 可选的, UE也可以是按照通过 PDSCH 发送的消息中通知的 TDD配比来监听基站发送的 (e)PDCCH Order, 该消息可 以是 SIB1。
在本发明实施例中, 下行子帧集合可以包括特殊子帧。 当 UE 通过
(e)PDCCH发送的信令通知的 TDD配比中的特殊子帧监听 (e)PDCCH Order时, 如果通过 (e)PDCCH发送的信令通知的 TDD配比中指示的对应的子帧类型为 下行子帧, 则 UE可以按照下行子帧类型来接收其它下行数据。 该情况适应于 下面涉及的在特殊子帧监听基站发送的其它消息。
由于 (e)PDCCH order是基站发给连接态的 UE, 触发其进行随机接入的, 所以基站通常知道该 UE是否是 elMTA用户, 以及当 UE是 elMTA用户时, 是否采用(e)PDCCH发送的信令中通知的 TDD上下行配比。
发送单元 23, 用于在所述第一 TDD上下行配比中的上行子帧集合上发送 导频 preamble给所述基站。
由于基站尚不知道发送 preamble的是非 elMTA用户设备或 elMTA用户设 备, elMTA用户设备的发送单元 23采用根据 SIB1通知的 TDD上下行配比中 的上行子帧来发送 preamble, 可以保证基站准确地接收到用户设备发送的 preamble。
当基站发送 (e)PDCCH order 给 UE , 该(e)PDCCH order 里面会携带 preamble序号, 现有协议的规定为: 用户在子帧 n收到 (e)PDCCH order, 那么 在 n+k2子帧上的可用的随机接入资源上发送 preamble, k2>=6。
值得说明的是,可以由基站发送 (e)PDCCH order给用户设备来触发用户设 备的随机接入过程, 也可以由用户设备自身触发随机接入过程。
接收单元 21还用于在所述第一 TDD上下行配比中的下行子帧集合上,监 听所述基站通过所述 PDCCH或 ePDCCH发送的采用随机接入的无线网络临时 标识 RA-RNTI加 4尤的下行控制信息 DCI。
由于基站在接收到 preamble后, 不清楚 UE是否是 elMTA UE, 所以第三 监听单元 25按照 SIB1通知的 TDD配比对应的下行子帧或特殊子帧监听采用 RA-RNTI加扰的 DCI, 能确保所有 UE都能正确接收。
确定单元 22, 用于根据所述第一 TDD上下行配比确定发送随机接入消息
3的上行子帧。
发送单元 23还用于在所述确定的上行子帧上向所述基站发送所述随机接 入消息 3。
接收单元 21还用于在所述第二 TDD上下行配比中的下行子帧集合上,接 收所述基站发送的竟争解决消息。
由于基站接收到 UE发送的随机接入消息 3后, 已经识别出 UE是 elMTA 用户设备还是非 elMTA用户设备, 以及当 UE是 elMTA用户时, 是否使用通 过 (e)PDCCH发送的信令中通知的 TDD上下行配比, 所以优选的, 接收单元 21根据通过 (e)PDCCH发送的信令中通知的 TDD上下行配比来监听竟争解决 消息。 这样, 由于通过 (e)PDCCH发送的信令中通知的 TDD上下行配比中可 用的下行子帧比 SIB中通知的 TDD配比中可用的下行子帧多, 可以让 UE有 更多的机会来接收该竟争解决消息,减少随机接入时延,提高基站调度灵活性。
可选的, UE也可以按照 SIB1通知的 TDD上下行配比来监听竟争解决消 根据本发明实施例提供的一种用户设备, 通过使非 elMTA 用户设备和 elMTA用户设备都统一采用物理下行共享信道发送的信令中包含的上下行配 比确定的上行子帧来接收和发送随机接入过程中的各消息,使得基站能准确地 接收到非 elMTA用户设备和 elMTA用户设备发送的随机接入消息,也减少了 elMTA用户设备按第二 TDD上下行配比确定随机接入消息 3发送时刻并发送 随机接入消息 3带来的功率开销和上行干扰问题; 且可以减少随机接入时延, 提高基站调度灵活性。
图 12为本发明一种用户设备的第三实施例的结构示意图。 如图 12所示, 该用户设备 7000包括:
发送单元 73,用于通过基站预先配置的物理随机接入信道 PRACH向所述 基站发送导频或向所述基站发送所述基站预先配置的导频或导频集合中的预 留导频。
接收单元 71 ,用于接收所述基站通过物理下行控制信道 PDCCH或增强的 物理下行控制信道 ePDCCH发送的信令,所述信令包含时分双工 TDD上下行 配比。
确定单元 72, 用于根据所述 TDD上下行配比确定发送随机接入消息 3的 上行子帧。
发送单元 73还用于在所述确定的上行子帧上向所述基站发送所述随机接 入消息 3。
基站为 elMTA UE配置新的 PRACH资源, 或者新的前导码, 或者将原有 的前导码集合中预留出一部分前导码。
这样, elMTA UE使用所述新的 PRACH资源, 或者新的前导码, 或者将 原有的前导码集合中预留出一部分前导码进行随机接入过程时,基站通知所述 PRACH资源, 或者新的前导码, 或者将原有的前导码集合中预留出一部分前 导码判断出 UE是 elMTA UE。 从而在接收随机接入消息 3 时, 可以按照 (e)PDCCH信令通知的 TDD配比来接收, 因为 (e)PDCCH信令通知的 TDD配 比代表最适合系统性能的配比, 所以使用所述 (e)PDCCH信令通知的 TDD配 比来执行随机接入过程, 能提升随机接入过程的性能。 而对于非 elMTA UE则 按照 SIB1通知的 TDD上下行配比来接收随机接入消息 3,可以使基站准确接 收到 elMTA用户设备和非 elMTA用户设备发送的随机接入消息 3。
可以理解的, 所述新的 PRACH资源, 或者新的前导码, 或者将原有的 前导码集合中预留出一部分前导码可以通过系统广播消息, 专用 RRC消息或 者物理层信令, MAC层信令等方式配置给 UE。
根据本发明实施例提供的一种用户设备, 通过根据基站预先配置的新的 PRACH资源, 或者新的前导码, 或者将原有的前导码集合中预留出一部分前 导码向基站发送前导码, 可以使基站判断出该用户设备为 elMTA用户设备, 从而使基站准确接收到 elMTA用户设备和非 elMTA用户设备发送的随机接入 消息 3。
图 13为本发明一种用户设备的第四实施例的结构示意图。 如图 13所示, 该用户设备 8000包括:
接收单元 81 , 用于接收基站通过预定方式发送的配置通知, 所述配置通 知包括以下任一种: 预先配置的物理随机接入信道 PRACH、 预先配置的导频 或导频集合中的预留导频。
发送单元 83,用于通过所述 PRACH向所述基站发送导频或向所述基站发 送所述预先配置的导频或导频集合中的预留导频。
接收单元 81还用于接收所述基站通过物理下行控制信道 PDCCH或增强 的物理下行控制信道 ePDCCH发送的信令,所述信令包含时分双工 TDD上下 行配比。
接收单元 81还用于在所述 TDD上下行配比的下行子帧集合上,接收所述 基站发送的随机接入响应消息。
确定单元 85, 用于根据所述 TDD上下行配比确定发送随机接入消息 3的 上行子帧。
发送单元 83还用于在所述确定的上行子帧上向所述基站发送所述随机接 入消息 3。
接收单元 81还用于在所述 TDD上下行配比的下行子帧集合上,接收所述 基站发送的竟争解决消息。
本实施例与上述实施例的区别在于, 基站根据所述新的 PRACH资源, 或 者新的前导码,或者将原有的前导码集合中预留出一部分前导码判断出 UE是 elMTA UE。 从而在后面的随机接入响应消息, 以及随机接入消息 3及竟争解 决消息, 都可以按照 (e)PDCCH信令通知的 TDD配比来发送或接收。
根据本发明实施例提供的一种用户设备, 通过根据基站预先配置的新的 PRACH资源, 或者新的前导码, 或者将原有的前导码集合中预留出一部分前 导码向基站发送前导码, 可以使基站判断出该用户设备为 elMTA用户设备, 从而使基站准确接收到 elMTA用户设备和非 elMTA用户设备发送的随机接入 消息 3; 且可以减少随机接入时延, 提高基站调度灵活性。
图 14为本发明一种基站的第一实施例的结构示意图。如图 14所示, 该基 站 3000包括:
发送单元 31 , 用于通过物理共享信道 PDSCH向 elMTA用户设备发送第 一信令, 以及通过物理下行控制信道 PDCCH 或增强的物理下行控制信道 ePDCCH向所述 elMTA用户设备发送第二信令, 所述第一信令包含第一时分 双工 TDD上下行配比, 所述第二信令包含第二 TDD上下行配比。
基站在正确接收到随机接入消息 3之前并不知道发送随机接入消息 3之前 的各消息是 elMTA用户设备或非 elMTA用户设备, 但发送单元 31可以通过 PDSCH向 elMTA用户设备和非 elMTA用户设备发送第一信令, 该第一信令 可以是 SIB1。 在该第一信令中包含了第一 TDD上下行配比, 该第一 TDD上 下行配比是半静态配置的。
对于 elMTA用户设备, 还可以通过 (e)PDCCH接收到基站发送的第二信 令。 所以, 发送单元 31通过 (e)PDCCH向 elMTA用户设备发送该第二信令。 在该第二信令中包含了第二 TDD上下行配比,该第二 TDD上下行配比是可以 动态改变的, 例如 10ms ~ 40ms改变一次上下行配比。
第一 TDD上下行配比和第二 TDD上下行配比中包含的子帧类型、配比规 则还是采用如表 1所示的上下行配比。
接收单元 32, 用于接收所述 elMTA用户设备在根据所述第一 TDD上下 行配比确定的上行子帧上发送的随机接入消息 3。
对于非 elMTA用户设备,当然还是根据第一 TDD上下行配比发送 Msg3。 但是, elMTA用户不按照 (e)PDCCH里面通知的 TDD上下行配比来确定发送 Msg3的子帧, 而是按照 SIB1中通知的 TDD配比来确定发送 Msg3的子帧。 因此, 对于无论是非 elMTA用户设备还是 elMTA用户设备, 接收单元 32在 根据第一 TDD 上下行配比确定的上行子帧上都可以准确接收到它们发送的 Msg3。
采用本实施例的技术方案, 由于基站知道非 elMTA用户设备和 elMTA用 户设备都统一采用根据 SIB1通知的上下行配比确定的上行子帧来发送 Msg3, 因此, 基站能准确地接收到非 elMTA 用户设备和 elMTA 用户设备发送的 Msg3, 保持了 R12版本之前的非 elMTA用户设备的向后兼容性。
根据本发明实施例提供的一种基站, 通过使非 elMTA用户设备和 elMTA 用户设备都统一采用物理下行共享信道发送的信令中包含的上下行配比确定 的上行子帧来发送随机接入消息 3, 从而该基站能准确地接收到非 elMTA用 户设备和 elMTA用户设备发送的随机接入消息 3。
图 15为本发明一种基站的第二实施例的结构示意图。如图 15所示, 该基 站 4000包括:
发送单元 41 , 用于通过物理共享信道 PDSCH向 elMTA用户设备发送第 一信令, 以及通过物理下行控制信道 PDCCH 或增强的物理下行控制信道 ePDCCH向所述 elMTA用户设备发送第二信令, 所述第一信令包含第一时分 双工 TDD上下行配比, 所述第二信令包含第二 TDD上下行配比。
发送单元 41 , 还用于在所述第二 TDD上下行配比中的下行子帧集合上, 向所述使能 elMTA功能的用户设备发送物理下行控制信道指令 PDCCH Order 或增强的物理下行控制信道指令 ePDCCH Order。
发送单元 41在第二 TDD上下行配比中的下行子帧集合上向 elMTA用户 设备发送 (e)PDCCH Order, 这样, 由于 (e)PDCCH发送的信令中通知的 TDD 配比中可用的下行子帧比 SIB 1中通知的 TDD配比中可用的下行子帧多,可以 让 UE有更多的机会来接收 (e)PDCCH Order, 减少随机接入时延, 提高基站调 度灵活性。 可选的, 基站也可以是在第一 TDD上下行配比的下行子帧集合上 向 elMTA用户设备发送 (e)PDCCH Order。
在本发明实施例中,下行子帧集合可以包括特殊子帧。当基站在第二 TDD 上下行配比中的下行子帧集合上向 elMTA用户设备发送 (e)PDCCH Order时, TDD上下行配比中可以指示的对应的子帧类型为下行子帧, 则 UE可以按照 下行子帧类型来接收其它下行数据。该情况适应于下面涉及的在特殊子帧监听 基站发送的其它消息。
发送单元 41还用于在所述第一 TDD上下行配比中的下行子帧集合上,通 过所述 PDCCH或 ePDCCH向所述 elMTA用户设备发送采用随机接入的无线 网络临时标识 RA-RNTI加扰的下行控制信息 DCI。 基站在接收到 UE发送的 preamble后,仍然不清楚 UE是否是 elMTA UE, 发送采用 RA-RNTI加扰的 DCI, 能确保所有 UE都能正确接收。
接收单元 42, 用于接收所述 elMTA用户设备在根据所述第一 TDD上下 行配比确定的上行子帧上发送的随机接入消息 3。
发送单元 41还用于在所述第二 TDD上下行配比中的下行子帧集合上,向 所述 elMTA用户设备发送竟争解决消息。
由于基站接收到 UE发送的随机接入消息 3后, 已经识别出 UE是 elMTA 用户设备还是非 elMTA用户设备, 以及当 UE是 elMTA用户时, 是否使用通 过 (e)PDCCH发送的信令中通知的 TDD上下行配比, 所以优选的, 发送单元 41在第二 TDD上下行配比中的下行子帧集合上, 向 elMTA用户设备发送竟 争解决消息。 这样, 由于通过 (e)PDCCH发送的信令中通知的 TDD上下行配 比中可用的下行子帧比 SIB中通知的 TDD配比中可用的下行子帧多, 可以让 UE有更多的机会来接收该竟争解决消息, 减少随机接入时延, 提高基站调度 灵活性。
可选的, 基站也可以在第一 TDD 上下行配比中的下行子帧集合上, 向 elMTA用户设备发送竟争解决消息。
根据本发明实施例提供的一种基站, 通过使非 elMTA用户设备和 elMTA 用户设备都统一采用物理下行共享信道发送的信令中包含的上下行配比确定 的上行子帧来接收和发送随机接入过程中的各消息,从而该基站能准确地接收 到非 elMTA用户设备和 elMTA用户设备发送的随机接入消息;且可以减少随 机接入时延, 提高基站调度灵活性。
图 16为本发明一种基站的第三实施例的结构示意图。如图 16所示, 该基 站 9000包括:
接收单元 91 , 用于接收用户设备发送的预先配置的导频或导频集合中的 预留导频或通过预先配置的物理随机接入信道 PRACH发送的导频。
确定单元 92, 用于确定所述用户设备为 elMTA用户设备。
发送单元 93,用于通过物理下行控制信道 PDCCH或增强的物理下行控制 信道 ePDCCH向所述使能 elMTA功能的用户设备发送信令, 所述信令包含时 分双工 TDD上下行配比。 接收单元 91还用于在所述 elMTA用户设备根据所述 TDD上下行配比确 定的上行子帧上, 接收所述 elMTA用户设备发送的随机接入消息 3。
基站为 elMTA UE配置新的 PRACH资源, 或者新的前导码, 或者将原有 的前导码集合中预留出一部分前导码。
这样, elMTA UE使用所述新的 PRACH资源, 或者新的前导码, 或者将 原有的前导码集合中预留出一部分前导码进行随机接入过程时,基站通知所述 PRACH资源, 或者新的前导码, 或者将原有的前导码集合中预留出一部分前 导码判断出 UE是 elMTA UE。 从而在接收随机接入消息 3 时, 可以按照 (e)PDCCH信令通知的 TDD配比来接收, 因为 (e)PDCCH信令通知的 TDD配 比代表最适合系统性能的配比, 所以使用所述 (e)PDCCH信令通知的 TDD配 比来执行随机接入过程, 能提升随机接入过程的性能。 而对于非 elMTA UE则 按照 SIB1通知的 TDD上下行配比来接收随机接入消息 3,可以使基站准确接 收到 elMTA用户设备和非 elMTA用户设备发送的随机接入消息 3。
可以理解的, 所述新的 PRACH资源, 或者新的前导码, 或者将原有的 前导码集合中预留出一部分前导码可以通过系统广播消息, 专用 RRC消息或 者物理层信令, MAC层信令等方式配置给 UE。
根据本发明实施例提供的一种基站, 通过根据基站预先配置的新的 PRACH资源, 或者新的前导码, 或者将原有的前导码集合中预留出一部分前 导码向基站发送前导码, 可以使基站判断出该用户设备为 elMTA用户设备, 从而使基站准确接收到 elMTA用户设备和非 elMTA用户设备发送的随机接入 消息 3。
图 17为本发明一种基站的第四实施例的结构示意图。如图 17所示, 该基 站 10000包括:
发送单元 113, 用于通过预定方式向 elMTA用户设备发送配置通知, 所 述配置通知包括以下任一种: 预先配置的物理随机接入信道 PRACH、 预先配 置的导频或导频集合中的预留导频。
接收单元 111 ,用于接收所述 elMTA用户设备发送的所述预先配置的导频 或导频集合中的预留导频或通过所述 PRACH发送的导频。
确定单元 112, 用于确定所述用户设备为 elMTA用户设备。
发送单元 113还用于通过物理下行控制信道 PDCCH或增强的物理下行控 制信道 ePDCCH向所述使能 elMTA功能的用户设备发送信令, 所述信令包含 时分双工 TDD上下行配比。
发送单元 113还用于在所述 TDD上下行配比的下行子帧集合上, 向所述 elMTA用户设备发送随机接入响应消息。
接收单元 111还用于在所述 elMTA用户设备根据所述 TDD上下行配比确 定的上行子帧上, 接收所述 elMTA用户设备发送的随机接入消息 3。
发送单元 113还用于在所述 TDD上下行配比的下行子帧集合上, 向所述 elMTA用户设备发送竟争解决消息。
本实施例与上述实施例的区别在于, 基站根据所述新的 PRACH资源, 或 者新的前导码,或者将原有的前导码集合中预留出一部分前导码判断出 UE是 elMTA UE。 从而在后面的随机接入响应消息, 以及随机接入消息 3及竟争解 决消息, 都可以按照 (e)PDCCH信令通知的 TDD配比来发送或接收。
根据本发明实施例提供的一种基站, 通过根据基站预先配置的新的 PRACH资源, 或者新的前导码, 或者将原有的前导码集合中预留出一部分前 导码向基站发送前导码, 可以使基站判断出该用户设备为 elMTA用户设备, 从而使基站准确接收到 elMTA用户设备和非 elMTA用户设备发送的随机接入 消息 3; 且可以减少随机接入时延, 提高基站调度灵活性。
图 18为本发明一种用户设备的第五实施例的结构示意图。 如图 18所示, 该用户设备 5000包括:
接收器 51、 处理器 52和发送器 53。
其中:
接收器,用于接收基站通过物理下行共享信道 PDSCH发送给 elMTA用户 设备的第一信令, 以及接收所述基站通过物理下行控制信道 PDCCH或增强的 物理下行控制信道 ePDCCH发送给所述 elMTA用户设备的第二信令, 所述第 一信令包含第一时分双工 TDD上下行配比;
处理器, 用于根据所述第一 TDD上下行配比确定发送随机接入消息 3的 上行子帧;
发送器, 用于在所述确定的上行子帧上向所述基站发送所述随机接入消息
3。 在一些可行的实施方式中, 所述发送器执行在所述确定的上行子帧上向所 述基站发送所述随机接入消息 3 的步骤之前, 所述发送器还用于执行如下步 骤:
在所述第一 TDD上下行配比中的上行子帧集合上发送导频 preamble给所 述基站。
在一些可行的实施方式中, 所述发送器执行所述在所述第一 TDD上下行 配比中的上行子帧集合上发送导频 preamble给所述基站的步骤之前, 所述接 收器还用于执行如下步骤:
在所述第二 TDD上下行配比中的下行子帧集合上, 监听所述基站发送的 物理下行控制信道指令 PDCCH Order 或增强的物理下行控制信道指令 ePDCCH Order; 或,
在所述第一 TDD上下行配比中的下行子帧集合上, 监听所述基站发送的 所述 PDCCH Order或 ePDCCH Order。
在一些可行的实施方式中, 所述发送器执行所述在所述确定的上行子帧上 向所述基站发送所述随机接入消息 3的步骤之前,所述接收器还用于执行如下 步骤:
在所述第一 TDD上下行配比中的下行子帧集合上, 监听所述基站通过所 述 PDCCH或 ePDCCH发送的采用随机接入的无线网络临时标识 RA-RNTI加 扰的下行控制信息 DCI。
在一些可行的实施方式中, 所述发送器执行所述在所述确定的上行子帧上 向所述基站发送所述随机接入消息 3的步骤之后,所述接收器还用于执行如下 步骤:
在所述第二 TDD上下行配比中的下行子帧集合上, 接收所述基站发送的 竟争解决消息; 或,
在所述第一 TDD上下行配比中的下行子帧集合上, 接收所述基站发送的 所述竟争解决消息。
在一些可行的实施方式中, 所述第一信令为系统信息块 1。
根据本发明实施例提供的一种用户设备, 通过使非 elMTA 用户设备和 elMTA用户设备都统一采用物理下行共享信道发送的信令中包含的上下行配 比确定的上行子帧来发送随机接入消息 3,使得基站能准确地接收到非 elMTA 用户设备和 elMTA用户设备发送的随机接入消息 3, 也减少了 elMTA用户设 备按第二 TDD上下行配比确定随机接入消息 3发送时刻并发送随机接入消息 3带来的功率开销和上行干扰问题; 且可以减少随机接入时延, 提高基站调度 灵活性。
图 19为本发明一种基站的一个实施例的结构示意图。如图 19所示, 该基 站 6000包括:
发送器 61和接收器 62。
其中:
发送器, 用于通过物理共享信道 PDSCH向 elMTA用户设备发送第一信 令, 以及通过物理下行控制信道 PDCCH或增强的物理下行控制信道 ePDCCH 向所述 elMTA用户设备发送第二信令, 所述第一信令包含第一时分双工 TDD 上下行配比, 所述第二信令包含第二 TDD上下行配比;
接收器,用于接收所述 elMTA用户设备在根据所述第一 TDD上下行配比 确定的上行子帧上发送的随机接入消息 3。
在一些可行的实施方式中, 所述接收器执行所述接收所述 elMTA用户设 备在根据所述第一 TDD上下行配比确定的上行子帧上发送的随机接入消息 3 的步骤之前, 所述发送器还用于执行如下步骤:
在所述第二 TDD上下行配比中的下行子帧集合上,向所述 elMTA用户设 备发送物理下行控制信道指令 PDCCH Order或增强的物理下行控制信道指令 ePDCCH Order; 或,
在所述第一 TDD上下行配比中的下行子帧集合上,向所述 elMTA用户设 备发送所述 PDCCH Order或 ePDCCH Order。
在一些可行的实施方式中, 所述接收执行所述接收所述 elMTA用户设备 在根据所述第一 TDD上下行配比确定的第一上行子帧上发送的随机接入消息 3的步骤之前, 所述发送器还用于执行如下步骤:
在所述第一 TDD上下行配比中的下行子帧集合上, 通过所述 PDCCH或 ePDCCH 向所述 elMTA 用户设备发送采用随机接入的无线网络临时标识 RA-RNTI加 4尤的下行控制信息 DCI。
在一些可行的实施方式中, 所述接收器执行所述接收所述 elMTA用户设 备在根据所述第一 TDD上下行配比确定的第一上行子帧上发送的随机接入消 息 3的步骤之后, 所述发送器还用于执行如下步骤:
在所述第二 TDD上下行配比中的下行子帧集合上,向所述 elMTA用户设 备发送竟争解决消息; 或,
在所述第一 TDD上下行配比中的下行子帧集合上,向所述 elMTA用户设 备发送所述竟争解决消息。在一些可行的实施方式中, 所述第一信令为系统信 息块 1。
根据本发明实施例提供的一种基站设备, 通过使非 elMTA 用户设备和 elMTA用户设备都统一采用物理下行共享信道发送的信令中包含的上下行配 比确定的上行子帧来接收和发送随机接入过程中的各消息,从而该基站能准确 地接收到非 elMTA用户设备和 elMTA用户设备发送的随机接入消息; 且可以 减少随机接入时延, 提高基站调度灵活性。
图 6为本发明一种随机接入方法的第五实施例的流程图。如图 6所示, 该 方法包括以下步骤:
步骤 501 , 通过基站预先配置的物理随机接入信道 PRACH向所述基站发 送导频或向所述基站发送所述基站预先配置的导频或导频集合中的预留导频。
步骤 S502, 接收所述基站通过物理下行控制信道 (e)PDCCH发送的信令, 所述信令包含时分双工 TDD上下行配比。
步骤 S503,根据所述 TDD上下行配比确定发送随机接入消息 3的上行子 帧。
步骤 S504, 在所述确定的上行子帧上向所述基站发送所述随机接入消息
3。
图 7为本发明一种随机接入方法的第六实施例的流程图。如图 7所示, 该 方法包括以下步骤:
步骤 S601 , 接收基站通过预定方式发送的配置通知, 所述配置通知包括 以下任一种: 预先配置的物理随机接入信道 PRACH、 预先配置的导频或导频 集合中的预留导频。
步骤 S602, 通过所述 PRACH向所述基站发送导频或向所述基站发送所 述预先配置的导频或导频集合中的预留导频。
步骤 S603, 接收所述基站通过物理下行控制信道 (e)PDCCH发送的信令, 所述信令包含时分双工 TDD上下行配比。
步骤 S604, 在所述 TDD上下行配比的下行子帧集合上, 接收所述基站发 送的随机接入响应消息。
步骤 S605,根据所述 TDD上下行配比确定发送随机接入消息 3的上行子 帧。
步骤 S606, 在所述确定的上行子帧上向所述基站发送所述随机接入消息
3。
步骤 S607, 在所述 TDD上下行配比的下行子帧集合上, 接收所述基站发 送的竟争解决消息。
图 8为本发明一种随机接入方法的第七实施例的流程图。如图 8所示, 该 方法包括以下步骤:
步骤 S701 , 接收用户设备发送的预先配置的导频或导频集合中的预留导 频或通过预先配置的物理随机接入信道 PRACH发送的导频。
步骤 S702, 确定所述用户设备为使能 elMTA功能的用户设备。
步骤 S703, 通过物理下行控制信道 (e)PDCCH向所述使能 elMTA功能的 用户设备发送信令, 所述信令包含时分双工 TDD上下行配比。
步骤 S704, 在所述使能 elMTA功能的用户设备根据所述 TDD上下行配 比确定的上行子帧上, 接收所述使能 elMTA功能的用户设备发送的随机接入 消息 3。
图 9为本发明一种随机接入方法的第八实施例的流程图。如图 9所示, 该 方法包括以下步骤:
步骤 S801 , 通过预定方式向用户设备发送配置通知, 所述配置通知包括 以下任一种: 预先配置的物理随机接入信道 PRACH、 预先配置的导频或导频 集合中的预留导频。
步骤 S802, 接收所述用户设备发送的所述预先配置的导频或导频集合中 的预留导频或通过所述 PRACH发送的导频。
步骤 S803, 确定所述用户设备为使能 elMTA功能的用户设备。
步骤 S804, 通过物理下行控制信道 (e)PDCCH向所述使能 elMTA功能的 用户设备发送信令, 所述信令包含时分双工 TDD上下行配比。
步骤 S805,在所述 TDD上下行配比的下行子帧集合上,向所述使能 elMTA 功能的用户设备发送随机接入响应消息。
步骤 S806, 在所述使能 elMTA功能的用户设备根据所述 TDD上下行配 比确定的上行子帧上, 接收所述使能 elMTA功能的用户设备发送的随机接入 消息 3。
步骤 S807,在所述 TDD上下行配比的下行子帧集合上,向所述使能 elMTA 功能的用户设备发送竟争解决消息。
所属领域的技术人员可以清楚地了解到, 为描述的方便和筒洁, 上述描述 的设备和模块的具体工作过程, 可以参考前述方法实施例中的对应过程描述, 在此不再赘述。
在本申请所提供的几个实施例中, 应该理解到, 所揭露的设备和方法, 可 以通过其它的方式实现。 例如, 以上所描述的装置实施例仅仅是示意性的, 例 如, 所述模块的划分, 仅仅为一种逻辑功能划分, 实际实现时可以有另外的划 分方式, 例如多个模块或组件可以结合或者可以集成到另一个设备中, 或一些 特征可以忽略, 或不执行。 另一点, 所显示或讨论的相互之间的耦合或直接耦 合或通信连接可以是通过一些通信接口, 装置或模块的间接耦合或通信连接, 可以是电性, 机械或其它的形式。
所述作为分离部件说明的模块可以是或者也可以不是物理上分开的,作为 也可以分布到多个网络单元上。 可以根据实际的需要选择其中的部分或者全 部, 模块来实现本实施例方案的目的。
另外, 在本发明各个实施例中的各功能模块可以集成在一个处理模块中, 也可以是各个模块单独物理存在,也可以两个或两个以上模块集成在一个模块 中。
通过以上的实施方式的描述,本领域的技术人员可以清楚地了解到各实施 方式可借助软件加必需的通用硬件平台的方式来实现, 当然也可以通过硬件。 基于这样的理解,上述技术方案本质上或者说对现有技术做出贡献的部分可以 以软件设备的形式体现出来,该计算机软件设备可以存储在计算机可读存储介 质中, 如 ROM/RAM、 磁碟、 光盘等, 包括若干指令用以使得一台计算机设备 (可以是个人计算机, 服务器, 或者网络设备等)执行各个实施例或者实施例 的某些部分所述的方法。 以上所述的实施方式, 并不构成对该技术方案保护范围的限定。任何在上 述实施方式的精神和原则之内所作的修改、等同替换和改进等, 均应包含在该 技术方案的保护范围之内。

Claims

权 利 要 求
1、 一种随机接入方法, 其特征在于, 包括:
接收基站通过物理下行共享信道 PDSCH发送给 elMTA用户设备的第一 信令, 以及接收所述基站通过物理下行控制信道 PDCCH或增强的物理下行控 制信道 ePDCCH发送给所述 elMTA用户设备的第二信令, 所述第一信令包含 第一时分双工 TDD上下行配比, 所述第二信令包含第二 TDD上下行配比; 所述 elMTA用户设备根据所述第一 TDD上下行配比确定发送随机接入消 息 3的上行子帧;
所述 elMTA用户设备在所述确定的上行子帧上向所述基站发送所述随机 接入消息 3。
2、 如权利要求 1所述的方法, 其特征在于, 所述 elMTA用户设备在所述 确定的上行子帧上向所述基站发送所述随机接入消息 3之前, 还包括:
所述 elMTA用户设备在所述第一 TDD上下行配比中的上行子帧集合上发 送导频 preamble给所述基站。
3、 如权利要求 2所述的方法, 其特征在于, 所述 elMTA用户设备在所述 第一 TDD上下行配比中的上行子帧集合上发送导频 preamble给所述基站之 前, 还包括:
在所述第二 TDD上下行配比中的下行子帧集合上,所述 elMTA用户设备 监听所述基站发送的物理下行控制信道指令 PDCCH Order或增强的物理下行 控制信道指令 ePDCCH Order; 或,
在所述第一 TDD上下行配比中的下行子帧集合上,所述 elMTA用户设备 监听所述基站发送的所述 PDCCH Order或 ePDCCH Order。
4、 如权利要求 1-3任意一项所述的方法, 其特征在于, 所述 elMTA用户 设备在所述确定的上行子帧上向所述基站发送所述随机接入消息 3之前,还包 括: 在所述第一 TDD上下行配比中的下行子帧集合上,所述 elMTA用户设备 监听所述基站通过所述 PDCCH或 ePDCCH发送的采用随机接入的无线网络临 时标识 RA-RNTI加 4尤的下行控制信息 DCI。
5、 如权利要求 1-4任意一项所述的方法, 其特征在于, 所述在所述确定 的上行子帧上向所述基站发送所述随机接入消息 3之后, 还包括:
在所述第二 TDD上下行配比中的下行子帧集合上,所述 elMTA用户设备 接收所述基站发送的竟争解决消息; 或,
在所述第一 TDD上下行配比中的下行子帧集合上,所述 elMTA用户设备 接收所述基站发送的所述竟争解决消息。
6、 如权利要求 1-5任意一项所述的方法, 其特征在于, 所述第一信令为 系统信息块 1。
7、 一种随机接入方法, 其特征在于, 包括:
通过物理共享信道 PDSCH向 elMTA用户设备发送第一信令, 以及通过 物理下行控制信道 PDCCH 或增强的物理下行控制信道 ePDCCH 向所述 elMTA用户设备发送第二信令, 所述第一信令包含第一时分双工 TDD上下行 配比, 所述第二信令包含第二 TDD上下行配比;
接收所述 elMTA用户设备在根据所述第一 TDD上下行配比确定的上行子 帧上发送的随机接入消息 3。
8、 如权利要求 7所述的方法, 其特征在于, 所述接收所述 elMTA用户设 备在根据所述第一 TDD上下行配比确定的上行子帧上发送的随机接入消息 3 之前, 还包括:
在所述第二 TDD上下行配比中的下行子帧集合上,向所述 elMTA用户设 备发送物理下行控制信道指令 PDCCH Order或增强的物理下行控制信道指令 ePDCCH Order; 或,
在所述第一 TDD上下行配比中的下行子帧集合上,向所述 elMTA用户设 备发送所述 PDCCH Order或 ePDCCH Order。
9、 如权利要求 7或 8所述的方法, 其特征在于, 所述接收所述 elMTA用 户设备在根据所述第一 TDD上下行配比确定的第一上行子帧上发送的随机接 入消息 3之前, 还包括:
在所述第一 TDD上下行配比中的下行子帧集合上, 通过所述 PDCCH或 ePDCCH 向所述 elMTA 用户设备发送采用随机接入的无线网络临时标识 RA-RNTI加 4尤的下行控制信息 DCI。
10、 如权利要求 7-9任意一项所述的方法, 其特征在于, 所述接收所述 elMTA用户设备在根据所述第一 TDD上下行配比确定的第一上行子帧上发送 的随机接入消息 3之后, 还包括:
在所述第二 TDD上下行配比中的下行子帧集合上,向所述 elMTA用户设 备发送竟争解决消息; 或,
在所述第一 TDD上下行配比中的下行子帧集合上,向所述 elMTA用户设 备发送所述竟争解决消息。
11、 如权利要求 7-10任意一项所述的方法, 其特征在于, 所述第一信令 为系统信息块 1。
12、 一种 elMTA用户设备, 其特征在于, 包括:
接收单元, 用于接收基站通过物理下行共享信道 PDSCH发送给 elMTA 用户设备的第一信令, 以及接收所述基站通过物理下行控制信道 PDCCH或增 强的物理下行控制信道 ePDCCH发送给所述 elMTA用户设备的第二信令, 所 述第一信令包含第一时分双工 TDD上下行配比,所述第二信令包含第二 TDD 上下行配比;
确定单元, 用于根据所述第一 TDD上下行配比确定发送随机接入消息 3 的上行子帧;
发送单元,用于在所述确定的上行子帧上向所述基站发送所述随机接入消 息 3。
13、 如权利要求 12所述的用户设备, 其特征在于, 所述发送单元还用于 在所述第一 TDD上下行配比中的上行子帧集合上发送导频 preamble给所述基 站。
14、 如权利要求 13所述的用户设备, 其特征在于, 所述接收单元还用于 在所述第二 TDD上下行配比中的下行子帧集合上, 监听所述基站发送的物理 下行控制信道指令 PDCCH Order或增强的物理下行控制信道指令 ePDCCH Order; 或 ,
所述接收单元还用于在所述第一 TDD上下行配比中的下行子帧集合上, 监听所述基站发送的所述 PDCCH Order或 ePDCCH Order。
15、 如权利要求 12-14任意一项所述的用户设备, 其特征在于, 所述接收 单元单元还用于在所述第一 TDD上下行配比中的下行子帧集合上, 监听所述 基站通过所述 PDCCH或 ePDCCH发送的采用随机接入的无线网络临时标识 RA-RNTI加 4尤的下行控制信息 DCI。
16、 如权利要求 12-15任意一项所述的用户设备, 其特征在于, 所述接收 单元还用于在所述第二 TDD上下行配比中的下行子帧集合上, 接收所述基站 发送的竟争解决消息; 或,
所述接收单元还用于在所述第一 TDD上下行配比中的下行子帧集合上, 接收所述基站发送的所述竟争解决消息。
17、 如权利要求 12-16任意一项所述的用户设备, 其特征在于, 所述第一 信令为系统信息块 1。
18、 一种基站, 其特征在于, 包括:
发送单元, 用于通过物理共享信道 PDSCH向 elMTA用户设备发送第一 信令, 以及通过物理下行控制信道 PDCCH 或增强的物理下行控制信道 ePDCCH向所述 elMTA用户设备发送第二信令, 所述第一信令包含第一时分 双工 TDD上下行配比, 所述第二信令包含第二 TDD上下行配比;
接收单元,用于接收使能 elMTA用户设备在根据所述第一 TDD上下行配 比确定的上行子帧上发送的随机接入消息 3。
19、 如权利要求 18所述的基站, 其特征在于, 所述发送单元还用于在所 述第二 TDD上下行配比中的下行子帧集合上,向所述 elMTA用户设备发送物 理下行控制信道指令 PDCCH Order或增强的物理下行控制信道指令 ePDCCH Order; 或 ,
所述发送单元还用于在所述第一 TDD上下行配比中的下行子帧集合上, 向使能 elMTA用户设备发送所述 PDCCH Order或 ePDCCH Order。
20、 如权利要求 18或 19所述的基站, 其特征在于, 所述发送单元还用于 在所述第一 TDD 上下行配比中的下行子帧集合上, 通过所述 PDCCH 或 ePDCCH 向所述 elMTA 用户设备发送采用随机接入的无线网络临时标识 RA-RNTI加 4尤的下行控制信息 DCI。
21、 如权利要求 18-20任意一项所述的基站, 所述发送单元还用于在所述 第二 TDD上下行配比中的下行子帧集合上,向所述使能 elMTA功能的用户设 备发送竟争解决消息; 或,
所述发送单元还用于在所述第一 TDD上下行配比中的下行子帧集合上, 向所述使能 elMTA功能的用户设备发送所述竟争解决消息。
22、 如权利要求 18-21任意一项所述的基站, 其特征在于, 所述第一信令 为系统信息块 1。
23、 一种 elMTA用户设备, 其特征在于, 包括
接收器, 用于接收基站通过物理下行共享信道 PDSCH发送给 elMTA用 户设备的第一信令, 以及接收所述基站通过物理下行控制信道 PDCCH或增强 的物理下行控制信道 ePDCCH发送给所述 elMTA用户设备的第二信令, 所述 第一信令包含第一时分双工 TDD上下行配比;
处理器, 用于根据所述第一 TDD上下行配比确定发送随机接入消息 3的 上行子帧; 发送器,用于在所述确定的上行子帧上向所述基站发送所述随机接入消息
3。
24、 如权利要求 23所述的用户设备, 其特征在于, 所述发送器执行在所 述确定的上行子帧上向所述基站发送所述随机接入消息 3的步骤之前,所述发 送器还用于执行如下步骤:
在所述第一 TDD上下行配比中的上行子帧集合上发送导频 preamble给所 述基站。
25、 如权利要求 24所述的用户设备, 其特征在于, 所述发送器执行所述 在所述第一 TDD上下行配比中的上行子帧集合上发送导频 preamble给所述基 站的步骤之前, 所述接收器还用于执行如下步骤:
在所述第二 TDD上下行配比中的下行子帧集合上, 监听所述基站发送的 物理下行控制信道指令 PDCCH Order 或增强的物理下行控制信道指令 ePDCCH Order; 或,
在所述第一 TDD上下行配比中的下行子帧集合上, 监听所述基站发送的 所述 PDCCH Order或 ePDCCH Order。
26、 如权利要求 23-25任意一项所述的用户设备, 其特征在于, 所述发送 器执行所述在所述确定的上行子帧上向所述基站发送所述随机接入消息 3 的 步骤之前, 所述接收器还用于执行如下步骤:
在所述第一 TDD上下行配比中的下行子帧集合上, 监听所述基站通过所 述 PDCCH或 ePDCCH发送的采用随机接入的无线网络临时标识 RA-RNTI加 扰的下行控制信息 DCI。
27、 如权利要求 23-26任意一项所述的用户设备, 其特征在于, 所述发送 器执行所述在所述确定的上行子帧上向所述基站发送所述随机接入消息 3 的 步骤之后, 所述接收器还用于执行如下步骤:
在所述第二 TDD上下行配比中的下行子帧集合上, 接收所述基站发送的 竟争解决消息; 或, 在所述第一 TDD上下行配比中的下行子帧集合上, 接收所述基站发送的 所述竟争解决消息。
28、 如权利要求 23-27任意一项所述的用户设备, 其特征在于, 所述第一 信令为系统信息块 1。
29、 一种基站, 其特征在于, 包括:
发送器, 用于通过物理共享信道 PDSCH向 elMTA用户设备发送第一信 令, 以及通过物理下行控制信道 PDCCH或增强的物理下行控制信道 ePDCCH 向所述 elMTA用户设备发送第二信令, 所述第一信令包含第一时分双工 TDD 上下行配比, 所述第二信令包含第二 TDD上下行配比;
接收器,用于接收所述 elMTA用户设备在根据所述第一 TDD上下行配比 确定的上行子帧上发送的随机接入消息 3。
30、 如权利要求 29所述的基站, 其特征在于, 所述接收器执行所述接收 所述 elMTA用户设备在根据所述第一 TDD上下行配比确定的上行子帧上发送 的随机接入消息 3的步骤之前, 所述发送器还用于执行如下步骤:
在所述第二 TDD上下行配比中的下行子帧集合上,向所述 elMTA用户设 备发送物理下行控制信道指令 PDCCH Order或增强的物理下行控制信道指令 ePDCCH Order; 或,
在所述第一 TDD上下行配比中的下行子帧集合上,向所述 elMTA用户设 备发送所述 PDCCH Order或 ePDCCH Order。
31、 如权利要求 29或 30所述的基站, 其特征在于, 所述接收执行所述接 收所述 elMTA用户设备在根据所述第一 TDD上下行配比确定的第一上行子帧 上发送的随机接入消息 3的步骤之前, 所述发送器还用于执行如下步骤: 在所述第一 TDD上下行配比中的下行子帧集合上, 通过所述 PDCCH或 ePDCCH 向所述 elMTA 用户设备发送采用随机接入的无线网络临时标识 RA-RNTI加 4尤的下行控制信息 DCI。
32、 如权利要求 29-31任意一项所述的基站, 其特征在于, 所述接收器执 行所述接收所述 elMTA用户设备在根据所述第一 TDD上下行配比确定的第一 上行子帧上发送的随机接入消息 3的步骤之后,所述发送器还用于执行如下步 骤:
在所述第二 TDD上下行配比中的下行子帧集合上,向所述 elMTA用户设 备发送竟争解决消息; 或,
在所述第一 TDD上下行配比中的下行子帧集合上,向所述 elMTA用户设 备发送所述竟争解决消息。
33、 如权利要求 29-32任意一项所述的基站, 其特征在于, 所述第一信令 为系统信息块 1。
PCT/CN2013/086458 2013-11-01 2013-11-01 一种随机接入方法及相关装置 WO2015062090A1 (zh)

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BR112016009736-0A BR112016009736B1 (pt) 2013-11-01 2013-11-01 Método de acesso randômico, equipamento de usuário e estação base
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