WO2015157879A1 - Procédé et appareil d'émission de séquences d'accès aléatoire - Google Patents

Procédé et appareil d'émission de séquences d'accès aléatoire Download PDF

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Publication number
WO2015157879A1
WO2015157879A1 PCT/CN2014/000702 CN2014000702W WO2015157879A1 WO 2015157879 A1 WO2015157879 A1 WO 2015157879A1 CN 2014000702 W CN2014000702 W CN 2014000702W WO 2015157879 A1 WO2015157879 A1 WO 2015157879A1
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Prior art keywords
node
random access
access sequence
prach
transmission method
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PCT/CN2014/000702
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English (en)
Chinese (zh)
Inventor
刘锟
戴博
鲁照华
夏树强
方惠英
石靖
李新彩
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中兴通讯股份有限公司
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Publication of WO2015157879A1 publication Critical patent/WO2015157879A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal

Definitions

  • the present invention relates to the field of communications, and in particular, to a random access sequence transmission method and apparatus. Background technique
  • MTC UE Machine Type Communication (MTC) User Terminal (MTC UE), also known as Machine to Machine (M2M) user communication equipment, is the main application form of the Internet of Things at this stage. Low power consumption and low cost are important guarantees for large-scale applications.
  • MTC UE Machine Type Communication (MTC) User Terminal
  • M2M Machine to Machine
  • GSM Global System of Mobile communication
  • LTE Long Term Evolution
  • LTE-A the evolution of LTE
  • M2M multi-class data services based on LTE/LTE-A will also be more attractive. Only when the cost of the LTE-M2M device can be lower than the MTC terminal of the GSM system can the M2M service actually switch from GSM to LTE.
  • the main alternative methods for reducing the cost of MTC user terminals include: reducing the number of terminals receiving antennas, reducing the baseband processing bandwidth of the terminal, reducing the peak rate supported by the terminal, using the half-duplex mode, and the like.
  • the reduction of the cost means that the performance is degraded.
  • the demand for the cell coverage of the LTE/LTE-A system cannot be reduced. Therefore, the MTC terminal configured with low cost needs to take some measures to meet the coverage performance requirement of the existing LTE terminal. .
  • the MTC terminal may be located in the basement, the corner, etc., and the scenario is worse than that of the normal LTE UE.
  • a total of five random access signaling transmission formats (also called Preamble format), that is, Preamble format 0-4, and Evolved Node B (Evolved Node B, eNB for short) are available from the LTE/LTE-A system.
  • One of the Preamble formats is selected, and the configuration information of the selected Preamble format is sent to the UE through System Information Block (SIB).
  • SIB System Information Block
  • the UE After learning the PRACH Preamble format supported by the current system, the UE generates random access signaling (also called Message 1, Messagel, referred to as Msgl) according to the currently configured random access sequence and according to the specific format of the selected Preamble format.
  • Msgl random access signaling
  • the eNB detects the random access signaling sent by the UE on the PRACH.
  • the eNB sends a random access response message (Random Access Response, RAR for short).
  • RAR Random Access Response
  • Message 2 Message2 or Msg2 for short
  • the location information of the physical resource block (PRB) occupied by the random access response message in the LTE/LTE-A system is included in the Downlink Control Information (DCI) and passes through the physical downlink control channel (Physical Sent by the Downlink Control Channel, PDCCH).
  • DCI information further includes a 16-bit Cyclic Redundancy Check (CRC), and the CRC further uses a 16-bit random access radio network Temporary Identity (RA).
  • -RNTI for the force port 4, especially for the port 4:
  • the UE receives the RAR message and obtains the uplink time synchronization and uplink resources. However, it is not determined at this time that the RAR message is sent to the UE itself instead of to other UEs because there are different UEs in the same time-frequency resource. The possibility of sending the same random access sequence, so that they receive the same RAR through the same RA-RNTI. Moreover, the UE also has no way of knowing if other UEs are using the same resources for random access. To this end, the UE needs to solve such random access conflicts by following the message 3 (Message3, Msg3 for short) and Message 4 (Message4, Msg4 for short) messages.
  • message 3 message3, Msg3 for short
  • Message 4 Message4, Msg4 for short
  • Msg3 is the first message based on uplink scheduling and transmitted on the PUSCH by HARQ (Hybrid Automatic Repeat request) mechanism.
  • the RRC Connection Request message is transmitted in the Msg3. If different UEs receive the same RAR message, they will obtain the same uplink resource and send at the same time.
  • the Msg3 message in order to distinguish different UEs, carries a UE-specific ID in the MSG3 to distinguish different UEs. In the case of initial access, the ID may be the S-TMSI of the UE (if any) or A randomly generated 40-bit value.
  • the UE After the UE sends the MSg3 message, it immediately starts the contention cancellation timer (and then restarts the timer every time Msg3 is retransmitted), and the UE needs to listen to the conflict resolution message returned by the eNodeB to itself during this time (Contention) Resolution, Msg4 message).
  • the LTE/LTE-A system needs to be enhanced with the Physical Random Access Channel (PRACH) to ensure that the MTC UE can access the system normally.
  • PRACH Physical Random Access Channel
  • the most important step is how to ensure that the random access signaling sent by the MTC UE in a harsh environment can be correctly detected by the eNB.
  • the embodiment of the invention provides a random access sequence transmission method and device, which solves the problem that the random access signaling sent by the MTC UE in a harsh environment can be correctly detected by the eNB.
  • a random access sequence transmission method includes: a first node sends a random access channel configuration message, where the random access channel configuration message includes at least a random access channel resource configuration information of a third node.
  • the random access channel resource configuration information includes at least one of the following:
  • the random access sequence hopping rule indication information allocated for the third node Preferably, the method further includes:
  • the second node is divided into J sets according to the first predefined rule, and each set is defined as 75 (where, 0 ⁇ ' ⁇ J_1, j is a positive integer greater than or equal to 1;
  • the second node in the ⁇ ( ⁇ ') is divided into subsets according to a second predefined rule, and each subset defines 75 ?), 2 (for the set 75 (the number of subsets to be divided, 2 ( ⁇ 1 , ⁇ q ⁇ Q(j) - l .
  • the third node is a set of one or more p(s) , the second node.
  • the first predefined rule is one of the following:
  • the number of repeated transmissions required for the second node to successfully decode the physical broadcast channel (PBCH) is divided into J value intervals, and the second node determines the attribution according to the interval segment in which the number of repetitions of the PBCH is successfully decoded when the PBCH is successfully decoded.
  • the number of repeated transmissions required for successfully decoding the primary information block (MIB) by the second node is divided into J value intervals, and the second node determines the attribution according to the interval segment in which the number of repetitions of the MIB is successfully decoded by the MIB.
  • the number of repeated transmissions required for the second node to successfully decode the system information block (SIB) is divided into J value intervals, and the second node determines the attribution according to the interval segment in which the number of repetitions of the SIB is successfully decoded by the SIB.
  • the second node determines the belonging set ⁇ ( ; according to the interval between the number of repetitions of the PSS when the PSS is successfully decoded;
  • the number of repeated transmissions required for the second node to successfully decode the secondary synchronization signal (SSS) is divided into J value intervals, and the second node determines the attribution according to the interval segment in which the number of repetitions of the SSS is successfully decoded.
  • Collection 75 ( .
  • the second predefined rule is:
  • the signal quality of the predefined reference signal is divided into a value interval, and the second node in the set /') measures the signal quality of the reference signal, and determines the interval according to the interval in which the signal quality of the measured reference signal is located. A subset of belongings 7 ⁇ ',? ).
  • the predefined reference signal is at least one of the following:
  • PSS a reference signal dedicated to the second node
  • CSI-RS Channel status indication reference signal
  • the signal quality is at least one of the following:
  • RSRP Reference signal received power
  • RSSI Received Signal Strength Indication
  • the uplink signal to noise ratio of the second node is the uplink signal to noise ratio of the second node.
  • the number of subsets of the set ⁇ ( ⁇ ) Q(J) ⁇ : is used in the subset ⁇ ( ⁇ ) when the second node successfully decodes the PBCH
  • the number of repetitions of the PBCH is greater than a predefined threshold
  • the number of repetitions of ⁇ is greater than a predefined threshold
  • the number of repetitions of the SIB is greater than a predefined threshold
  • the number of repetitions of the PSS is greater than a predefined threshold
  • the number of repetitions of the SSS is greater than a predefined threshold
  • the number of repetitions of the CSI-RS is greater than a predefined threshold.
  • the random access channel resource configuration information further includes at least one of the following: a threshold value of the number of repetitions of the PBCH;
  • a threshold value of the number of repetitions of the MIB a threshold value of the number of repetitions of the SIB
  • the threshold value of the number of repetitions of the CSI-RS is the threshold value of the number of repetitions of the CSI-RS.
  • mapping relationship between the signal quality interval segment of the reference signal and the belonging subset is configured by the first node or configured by the system.
  • the method further includes:
  • the second node in the subset adjusts the transmit power when transmitting random access signaling.
  • adjusting the transmit power when the second node in the subset ⁇ ( ⁇ , ) transmits the random access signaling includes at least one of the following:
  • the second node in the subset P(J, q) After the second node in the subset P(J, q) sends the random access signaling, and does not receive the random access response message sent by the first node, the second node increases the random transmission. Transmit power when accessing signaling.
  • the transmit power when the second node in the subset sends the random access signaling is not configured according to the maximum transmit power
  • the number of subsets in the set ⁇ ( ⁇ ) in which the subset is located is greater than one.
  • the third node is one or more subsets of the second node.
  • the second node is divided into S1 subsets according to a predefined rule, and S1 is a positive integer greater than or equal to 1, and the predefined rule is at least one of the following:
  • the coverage enhancement target value of the random access channel is divided into S1 value intervals, and the second node determines the coverage of the belonging sub-Msgl message according to the interval segment in which the coverage enhancement target value of the random access channel to be supported is located.
  • the enhanced target value is divided into S1 value intervals, and the second node determines the belonging child according to the interval segment in which the coverage enhancement target value of the random access channel to be supported is located.
  • the number of times that the Msgl message needs to be repeatedly sent is divided into S1 value intervals, and the second node determines the number of times that the Msgl message needs to be repeatedly transmitted according to the interval segment to be transmitted, and determines that the belonging child needs to repeatedly send the random access sequence.
  • the number of times is divided into S1 value intervals, and the second node determines the belonging subset according to the interval segment in which the number of times the random access sequence needs to be repeatedly transmitted needs to be repeatedly transmitted;
  • the number of repetitions required for the second node to successfully decode the physical broadcast channel (PBCH) is divided into S1 value intervals, and the second node determines the attribution according to the interval segment in which the number of repetitions of the PBCH is successfully decoded when the PBCH is successfully decoded.
  • the number of repetitions required for the second node to successfully decode the MIB is divided into S1 value intervals, and the second node determines the subset to which the membership belongs according to the interval segment in which the MIB repetition number is successfully decoded.
  • the number of repetitions required for the second node to successfully decode the system information block SIB is divided into S1 value intervals, and the second node determines the child to which it belongs according to the interval segment in which the number of repetitions of the SIB is successfully decoded by the SIB.
  • the number of repetitions required for the second node to successfully decode the primary synchronization signal PSS is divided into S1 value intervals, and the second node determines the child to which it belongs according to the interval segment in which the number of repetitions of the PSS is successfully decoded.
  • the number of repetitions required for the second node to successfully decode the secondary synchronization signal SSS is divided into S1 value intervals, and the second node determines the child to which it belongs according to the interval segment in which the number of repetitions of the SSS is successfully decoded. set.
  • the PRACH used by the third node to send the random access sequence occupies the same frequency domain resource in different first subframes.
  • the frequency domain resources occupied by the PRACH resources configured in different first subframes are not completely the same
  • the PRACH used by the third node to send the random access sequence is different.
  • the same frequency domain resource is occupied on the first subframe.
  • multiple PRACH resources are configured in the same first subframe, and the frequency domain resources occupied by the PRACH resources configured in the different first subframes are not completely
  • the PRACH used by the third node to send the random access sequence occupies the same frequency domain resource in different first subframes.
  • the first subframe is a subframe in which the third node is allocated a PRACH resource.
  • the indication information of the hopping enable parameter of the random access channel resource allocated for the third node is frequency hopping enable, or the random access channel allocated for the third node is enabled by default, the frequency hopping is predefined.
  • the random access channel allocated to the third node in the first subframe in the time window occupies the same PRB resource, and the random access allocated to the third node in the first subframe between two consecutive predefined time windows
  • the PRB resources occupied by the channel are different.
  • the random access channel allocated for the third node is occupied within the predefined time window.
  • PRB The starting PRB resource, "PRB, is calculated according to the following expression:
  • PRB is the starting PRB resource index
  • PRB.ffset is the PRB offset, which is the total number of PRBs occupied by the uplink, and N ⁇ is the number of PRBs occupied by one PRACH.
  • • ⁇ A is the index of the PRACH resource, or the frame index number, or the configuration period number of the PRACH, or the subframe number where the starting PRB of the PRACH resource is located.
  • K is a positive integer.
  • the PRB resources of the random access channel allocated for the third node are spaced apart by a predefined number of PRBs in the frequency domain.
  • the random access channel allocated for the third node is occupied within the predefined time window.
  • the starting PRB resource, B is calculated by the following expression:
  • L ffset is the PRB offset
  • the index of the PRACH resource or the frame index number, or the configuration period number of the PRACH, or the subframe number where the starting PRB of the PRACH resource is located.
  • K is a positive integer
  • P is a positive integer
  • B is the frequency hopping interval.
  • multiple packets are allocated to the third node in the first subframe.
  • one PRACH is selected from the plurality of PRACHs according to a predefined rule, and a random access sequence is transmitted on the selected PRACH.
  • the selected PRACHs in the different first subframes occupy different frequency domain resources.
  • the frequency domain resources occupied by the PRACH selected in the different first subframes are partially or completely different.
  • the N first subframes select PRACHs with the same PRB resources, and the adjacent two sets of N first subframes select PRACH resources according to a predefined rule, where N is greater than A positive integer equal to 1.
  • the predefined rule includes at least one of the following:
  • the index of the selected PRACH adjacent to the two sets of N first subframes is adjacent;
  • the PRB resources corresponding to the PRACH selected by the two adjacent N first subframes have the largest difference in the frequency domain
  • the PRB resources corresponding to the PRACHs selected by the two adjacent N first subframes have the smallest difference in the frequency domain;
  • the difference in the frequency domain of the PRB resources corresponding to the PRACHs selected by the two adjacent N first subframes is configured by the first node or configured by the system.
  • the third node is allocated by using the third node.
  • the frequency hopping pattern indication information of the random access channel resource determines the hopping pattern used.
  • the third node in the first subframe in the predefined time window sends a random access sequence. Some or all of them are different.
  • the index of the random access sequence sent by the third node in the first subframe is determined by at least one of the following:
  • the third node determines that the index of the random access sequence sent in the first subframe has multiple predefined rules
  • the third node is determined by the third node.
  • the assigned random access sequence hopping rule indicates that the information determines the predefined rule to use.
  • the random access sequence allocated to the third node in the predefined time window is the same, and two consecutive predefined The random access sequence assigned to the third node between time windows is different.
  • the index of the random access sequence sent by the third node is determined by at least one of the following:
  • the predefined time window refers to at least one of the following:
  • the configuration period of the K1 subframes, the K2 frames, and the K3 random access channel resources where K1, K2, and K3 are positive integers greater than or equal to 1, and the value is configured by the first node or configured by the system.
  • the second node is at least one of the following:
  • D2D device-to-device
  • the system configuration refers to a standard configuration or a network configuration or a network high layer configuration.
  • the first node is at least one of the following:
  • a macro base station a micro cell, a pico cell, a femto cell, a home base station, a low power node (LPN), and a relay station.
  • LPN low power node
  • An embodiment of the present invention further provides a random access sequence transmission apparatus, including:
  • the sending module is configured to: send a random access channel configuration message, where the random access channel configuration message includes at least a random access channel resource configuration information of the third node.
  • the device further comprises:
  • a resource management module configured to: divide the second node into J sets according to the first predefined rule, each set is defined as 75 (where, ⁇ ⁇ 7 - 1 , J is a positive integer greater than or equal to 1,
  • the second node in the ⁇ ( ⁇ ') is divided into subsets according to a second predefined rule, and each subset defines 7 ⁇ , ?), 2 (for the set 75 (the number of subsets to be divided, 2 ( ⁇ 1 , ⁇ q ⁇ Q(j) - l .
  • the third node is a set of one or more of the second nodes.
  • Embodiments of the present invention also provide a computer program, including program instructions, when the program instructions are When the first node is executed, the first node is caused to perform the above method.
  • Embodiments of the present invention also provide a carrier carrying the above computer program.
  • An embodiment of the present invention provides a method and an apparatus for transmitting a random access sequence, where a first node sends a random access channel configuration message, where the random access channel configuration message includes at least a random access channel resource configuration of a third node.
  • the information implements a higher random access performance of the MTC UE, and solves the problem that the random access signaling transmitted by the MTC UE in a harsh environment can be correctly detected by the eNB.
  • FIG. 1 is a schematic diagram of a PRACH allocated for an MTC UEs in one frame according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic diagram of PRACH allocated for MTC UEs in one frame according to Embodiment 3 of the present invention
  • FIG. 3 is a schematic diagram of PRACH allocated for MTC UEs in a PRACH configuration period according to Embodiment 3 of the present invention
  • FIG. 4 is a schematic diagram of another PRACH allocated to MTC UEs in a PRACH configuration period according to Embodiment 3 of the present invention.
  • FIG. 5 is a schematic diagram of PRACH allocated for MTC UEs in a configuration period of two PRACHs according to Embodiment 3 of the present invention
  • FIG. 6 is a schematic diagram of PRACH allocated for MTC UEs in a PRACH configuration period when the random access channel resource configuration information further includes frequency hopping enable indication information in Embodiment 3 of the present invention
  • FIG. 7 is a schematic diagram of PRACH allocated for MTC UEs in two frames in Embodiment 4 of the present invention.
  • FIG. 9 is a schematic diagram of PRACH allocated for MTC UEs in one frame according to Embodiment 5 of the present invention.
  • FIG. 10 is a schematic diagram of PRACH allocated for MTC UEs in Frame 0 according to Embodiment 6 of the present invention.
  • FIG. 11 is still another embodiment of the sixth embodiment of the present invention allocated for MTC UEs in Frame 0.
  • Figure 12 is a block diagram showing the structure of a random access sequence transmission apparatus according to Embodiment 8 of the present invention. Preferred embodiment of the invention
  • MTC UEs and non-MTC UEs there are MTC UEs and non-MTC UEs in the wireless system, and the MTC UEs are divided into S1 sets according to a predefined rule.
  • the pre-defined rule is: dividing the coverage enhancement target value of the random access channel into S1 value intervals, and determining, by the MTC UEs, the set that should belong to the interval segment in which the coverage enhancement target value of the random access channel to be supported is located .
  • CET0 of the PRC of the MTC UEs of the CEL0 is 0 dB
  • 10 minutes of the PRACH of the MTC UEs of the CEL3 ⁇ CET ⁇ 15dB.
  • the random access channel configuration message includes random access channel resource configuration information, and the MTC UEs can obtain at least one of the following information after decoding the random access channel resource configuration information:
  • the configuration period of the PRACH resources of the MTC UEs
  • Configuration information of a physical resource block (PRB) occupied by the PRACH during the configuration period Configuration information of a subframe occupied by the PRACH in the configuration period;
  • PRB physical resource block
  • the mode of the random access sequence allocated for the MTC UEs is Preamble format 0, the length of the time domain is 1 subframe, and the PR domain occupies 6 PRBs.
  • the PRACH configuration period of the MTC UEs is 1 frame. In one frame, the PRACH allocated for the MTC UEs is as shown in Figure 1.
  • the occupied PRBs are PRB7 ⁇ PRB12, PRB37-PRB42, and there are 5 PRACH transmission opportunities.
  • the starting resources are PRACH0, PRACH1, PRACH2, respectively. PRACH3, PRACH4.
  • the number of repeated transmissions of the PRACH required by the MTC UE (UE1) of one CEL1 is eight, and the UE1 selects the PRACH with the same PRB to transmit the Preamble format 0.
  • UE1 may send Preamble format 0 on the PRACH resources of PRB7 ⁇ PRB 12, that is, transmit on PRACH0, PRACH1, PRACH2, and PRACH3 of two frames.
  • UE1 may also send Preamble format 0 on the PRACH resource of PRB37-PRB42, that is, send Preamble format 0 on PRACH4 of 8 frames.
  • the number of repeated transmissions of PRACH required by a MTC UE (UE1) of CEL1 is 8 times, and UE1 selects PRACH with the same PRB to transmit Preamble format 0. Then, UE1 transmits Preamble format 0 on the PRACH resources of PRB7 ⁇ PRB12, that is, transmits on PRACH0, PRACH1, PRACH2, PRACH3 of two frames.
  • the PRACH resource of PRB37-PRB42 (PRACH4) is reserved for MTC UE or non-MTC UEs of CEL0.
  • the pre-defined rule may be at least one of the following: the coverage enhancement target value is divided into S1 value intervals, and the second node is in accordance with the coverage enhancement target value supported by the second node.
  • the interval segment determines the subset to which it belongs;
  • the coverage enhancement target value of the random access channel is divided into S1 value intervals, and the second node determines the subset that should belong according to the interval segment in which the coverage enhancement target value of the random access channel to be supported is located;
  • the coverage enhancement target value of the Msgl message is divided into S1 value intervals, and the second node determines, according to the interval segment where the coverage enhancement target value of the random access channel to be supported is located, The number of times that the Msgl message needs to be repeatedly sent is divided into S1 value intervals, and the second node determines the subset to which the Msgl message needs to be sent according to the number of times that the Msgl message needs to be repeatedly sent;
  • the number of times that the random access sequence needs to be repeatedly transmitted is divided into S1 value intervals, and the second node determines the subset to which the random access sequence needs to be transmitted according to the number of times that the random access sequence needs to be repeatedly transmitted;
  • the number of times that the physical broadcast channel (PBCH) needs to be repeatedly transmitted is divided into S1 value intervals, and the second node determines, according to the interval segment in which the number of repetitions of the PBCH used, is to be attributed according to the successful decoding of the PBCH. Subset;
  • the number of times that the main information block (MIB) needs to be repeatedly transmitted is divided into S1 value intervals, and the second node determines the subset that should belong to the interval segment in which the number of repetitions of the MIB is located according to the successful decoding of the MIB. ;
  • SIB system information block
  • the number of times that the primary synchronization signal (PSS) needs to be repeatedly transmitted is divided into S1 value intervals, and the second node determines that the interval segment in which the number of repetitions of the PSS is located should be attributed according to the successful decoding of the PSS. Subset;
  • the number of times that the secondary synchronization signal (SSS) needs to be repeatedly transmitted is divided into S1 value intervals, and the second node determines the subset that should belong to the interval segment in which the number of repetitions of the SSS is located according to the successful decoding of the SSS. .
  • MTC UEs There are MTC UEs and non-MTC UEs in the wireless system.
  • the MTC UEs are divided into J sets according to the first predefined rule, and each set is defined as p (wherein, ⁇ J- 1 , J is a positive integer greater than or equal to 1.
  • the first predefined rule is: The number of times that the secondary synchronization signal (SSS) needs to be repeatedly transmitted is divided into J value intervals.
  • SSS secondary synchronization signal
  • the MTC UEs successfully decodes the SSS, the number of repetitions of the SSS is less than a subset of the predefined threshold value 7 ⁇ '), and dividing the MTC UEs in the above p (the second pre-defined rule into a subset, each subset) Define ⁇ / ) ; for the set / ') the number of subsets to be divided, Q(J) ⁇ l , 0 ⁇ g ⁇ Q(j) - ⁇ .
  • the threshold of the number of SSS repetitions is random access Sent in channel resource configuration information.
  • the second predefined rule is: dividing the signal quality of the predefined reference signal into 2 (value interval, subset p (in the middle)
  • the MTC UEs measure the signal quality of the reference signal and determine the subset p to which it belongs based on the interval in which the signal quality of the measured reference signal is located. ).
  • the predefined reference signal is: a Cell Specific Reference Signal (CRS); wherein the signal quality is: Reference Signal Received (Reference Signal Received)
  • RSRP RSRP Power
  • the mapping between the RSRP interval segment of the CRS and the subset ⁇ 2 ( ⁇ /′′ of the MTC UEs is configured by the eNB.
  • the threshold of the SSS repetition number of the MTC UE is in the random access channel.
  • the resource configuration information is sent and configured as A.
  • the number of repetitions of the SSS is less than A; when the MTC UEs in the set 7 ⁇ 1 ) successfully decode the SSS, the number of repetitions of the SSS is greater than or equal to A.
  • each subset is defined as P ( G ,?), which corresponds to
  • the RSRP value interval is configured by standard default or by the eNB.
  • the MTC UEs are divided into four subsets, which are ⁇ 0 , 0 ), ⁇ 0 , 1 ), (0, 2) and (l) can also be called 4 Coverage Enhanced Level (CEL) MTC UEs.
  • the coverage enhancement level of the MTC UEs with the coverage enhancement level of ⁇ ( 0 , 0) is CEL0
  • ⁇ 0 , 1 ) is CEL1
  • the coverage enhancement level of the MTC UEs of p ( 0 , 2 ) is CEL2.
  • the coverage enhancement level of MTC UEs is CEL3.
  • the random access channel configuration message includes random access channel resource configuration information, and the MTC UEs can obtain at least one of the following information after decoding the random access channel resource configuration information:
  • the configuration period of the PRACH allocated for the MTC UEs
  • Configuration information of the subframe occupied by the PRACH allocated for the MTC UEs in the configuration period ; configuration information of the random access sequence allocated for the MTC UEs.
  • the random access sequence allocated for the MTC UEs is in the Preamble format 0, and the length is one subframe, and the number of the PRACHs is six frames.
  • the configuration period of the PRACH allocated for the MTC UEs is one frame.
  • the PRACH allocated for the MTC UEs is as shown in Figure 1.
  • the occupied PRBs are PRB7 ⁇ PRB12, PRB37-PRB42, and there are 5 PRACH transmission opportunities.
  • the starting resources are PRACH0, PRACH1, PRACH2, respectively. PRACH3, PRACH4.
  • the required number of repeated transmissions of the PRACH is 8 times, and the UE1 may send the Preamble format 0 on the PRACH resources of the PRB7 ⁇ PRB12, that is, on the PRACH0, PRACH1, PRACH2, and PRACH3 of the two frames. send.
  • the PRACH resources (PRACH4) of PRB37 ⁇ PRB42 are reserved for MTC UEs or non-MTC UEs of CEL0.
  • the transmit power may be adjusted when the UEs send the random access signaling in (0, 0), (0, 1), (0, 2 ), and if the foregoing MTC UE sends the random access signaling, the eNB does not receive the transmission.
  • the random access response message, the foregoing MTC UE increases the transmit power when the random access signaling is sent.
  • the first pre-defined rule may be at least one of the following: the number of times that the physical broadcast channel (PBCH) needs to be repeatedly transmitted is divided into J value intervals, The second node determines the set P to belong to according to the interval segment in which the number of repetitions of the PBCH used is successfully decoded according to the PBCH. The number of times that the main information block (MIB) needs to be repeatedly transmitted is divided into J value intervals. When the second node successfully decodes the MIB, the interval segment in which the number of repetitions of the MIB is determined determines the set p to belong to. ( ;
  • SIB System Information Block
  • the number of times that the primary synchronization signal (PSS) needs to be repeatedly transmitted is divided into J value intervals, and the second node determines the set ⁇ that should belong to the interval segment in which the number of repetitions of the PSS is located according to the successful decoding of the PSS. ( ⁇ ').
  • the predefined reference signal may be at least one of the following: a Channel State Indication Reference Signal (CSI-RS),
  • CSI-RS Channel State Indication Reference Signal
  • SSS Secondary Synchronization Signal
  • the signal quality may be at least one of the following:
  • RSRQ Reference Signal Received Quality
  • RSI Received Signal Strength Indicator
  • the uplink signal to noise ratio of the MTC UE is the uplink signal to noise ratio of the MTC UE.
  • MTC UEs and non-MTC UEs there are MTC UEs and non-MTC UEs in the wireless system, and will follow the predefined rules.
  • MTC UEs are divided into S1 sets.
  • the pre-defined rule is: dividing the coverage enhancement target value of the random access channel into S1 value intervals, and determining, by the MTC UEs, the set that should belong to the interval segment in which the coverage enhancement target value of the random access channel to be supported is located .
  • Max CET Max Coverage Enhanced Target
  • Sl 4 Coverage Enhanced Levels
  • Configuration information of a physical resource block (PRB) occupied by the PRACH in the configuration period ; configuration information of a subframe occupied by the PRACH in the configuration period;
  • PRB physical resource block
  • the random access sequence allocated for the MTC UEs is in the Preamble format 0, and the length is one subframe, and the number of the PRACHs is six frames.
  • the configuration period of the PRACH allocated for the MTC UEs is one frame.
  • the PRACH allocated for MTC UEs is as shown in Figure 2.
  • the occupied PRB is PRB7 ⁇ PRB12, and there are 4 PRACH transmission opportunities.
  • the starting resources are PRACH0, PRACH1, PRACH2, and PRACH3.
  • the random access channel resource configuration information further includes the frequency hopping enable indication information
  • the PRACH allocated for the MTC UEs in one PRACH configuration period is as shown in FIG. 3, and each PRACH
  • PRB calculate according to the following formula: Where "PRB is the starting PRB resource index;
  • PRB offset is the PB offset amount.
  • N ⁇ is the number of PRBs occupied by a PRACH.
  • the hopping pattern used is determined by the hopping pattern indication information of the random access channel resource allocated for the MTC UE.
  • the random access channel resource configuration information further includes the frequency hopping enable indication information
  • the PRACH allocated for the MTC UEs in one PRACH configuration period is as shown in FIG.
  • the starting PRB resource location of the PRACH transmission opportunity, "PRB, is calculated as follows: , where "PRB is the starting PRB resource index;
  • the PRACH allocated for the MTC UEs in the configuration period of the two PRACHs is as shown in FIG.
  • the starting PRB resource location of the PRACH transmission opportunity, "PRB, is calculated as follows:
  • PRB is the starting PRB resource index
  • N is the number of PRBs occupied by a random access channel. In this embodiment, 6
  • K is the Frame index number or the configuration cycle number of the PRACH.
  • the random access channel resource configuration information further includes a frequency hopping enable indication information, the PRACH allocated for the MTC UEs in a PRACH configuration period
  • PRB is the starting PRB resource index
  • PRE offset is the PB offset.
  • PRB offset the total number of PRBs occupied by the uplink.
  • N ⁇ is the number of PRBs occupied by one PRACH.
  • the index of the PRACH transmission opportunity is used. ;
  • the random access channel resource configuration information further includes frequency hopping enable indication information, each PRACH allocated for the MTC UEs in a PRACH configuration period
  • PRB The starting PRB resource location of the sending opportunity
  • PRB is the starting PRB resource index
  • PRB.ffset is the PRB offset; the total number of PRBs occupied by the uplink; N ⁇ is the number of PRBs occupied by one PRACH;
  • • ⁇ A is the index of the PRACH transmission opportunity, or the frame index number, or the PRACH match. Set the period number, or the subframe number where the starting PRB of the opportunity sent by the PRACH is located;
  • K is the frequency interval.
  • MTC UEs and non-MTC UEs there are MTC UEs and non-MTC UEs in the wireless system, and will follow the predefined rules.
  • MTC UEs are divided into S1 sets.
  • the pre-defined rule is: dividing the coverage enhancement target value of the random access channel into S1 value intervals, and determining, by the MTC UEs, the set that should belong to the interval segment in which the coverage enhancement target value of the random access channel to be supported is located .
  • Maximum coverage enhancement target of PRACH Max Coverage Enhanced Target, Max
  • CET Coverage Enhanced Levels
  • the mode of the random access sequence allocated for the MTC UEs is Preamble format 0, the length is 1 subframe, and 6 PRBs are occupied; the configuration period of the PRACH allocated for the MTC UEs is 2 frames. In the two frames, the PRACH allocated for the MTC UEs is as shown in Figure 7.
  • the occupied PRB is PRB7 ⁇ PRB12, and there are 8 PRACH transmission opportunities.
  • the starting resources are PRACHO, PRACH1, PRACH2, PRACH3, PRACH4, respectively. PRACH5, PRACH6, PRACH7 radical
  • the random access channel resource configuration information also includes the frequency hopping enable indication information, in 1
  • ⁇ U B is the total number of PRBs occupied by the uplink; the number of PRBs occupied by one PRACH; the index of the opportunity for PRACH transmission, or the frame index number, or the configuration period number of the PRACH, or the start of the opportunity for PRACH transmission The subframe number where the PRB is located;
  • K is a positive integer
  • P is a positive integer
  • ⁇ is the reserved PRB resource, l ° otherwise where H B Q is configured by the upper layer.
  • the random access channel resource configuration information further includes frequency hopping enable indication information
  • the start of each PRACH transmission opportunity is within a PRACH configuration period.
  • PRB resource location "PRB”
  • PRB.f is the PRB offset; the total number of PRBs occupied by the uplink; N is the number of PRBs occupied by one PRACH; The index of the opportunity for the PRACH transmission, either the frame index number, or the configuration period number of the PRACH, or the subframe number of the initial PRB of the opportunity transmitted by the PRACH;
  • K is a positive integer
  • P is a positive integer
  • the random access channel resource configuration information further includes frequency hopping enable indication information
  • PRB resource location " , calculated as follows: offset
  • PRB.ffset is the PB offset; the total number of PRBs occupied by the uplink; the number of PRBs occupied by one PRACH; The index of the PRACH transmission opportunity, or the frame index number, or the configuration period number of the PRACH, or the subframe number where the initial PRB of the opportunity transmitted by the PRACH is located;
  • K is a positive integer
  • P is a positive integer
  • the NRB is a reserved PRB resource.
  • the random access channel resource configuration information further includes a frequency hopping enable indication information, the start of each PRACH transmission opportunity in a PRACH configuration period
  • PRB resource location "PRB”
  • PRB.ffset is the PB offset; the total number of PRBs occupied by the uplink; N ⁇ is the number of PRBs occupied by one PRACH; the index of the PRACH transmission opportunity, or the frame index number, or the configuration period of the PRACH Number, or the subframe number of the starting PRB of the opportunity sent by the PRACH;
  • K is a positive integer
  • P is a positive integer
  • PRB is f megabit interval
  • the NRB is a reserved PRB resource.
  • MTC UEs and non-MTC UEs there are MTC UEs and non-MTC UEs in the wireless system, and the MTC UEs are divided into S1 sets according to a predefined rule.
  • the pre-defined rule is: dividing the coverage enhancement target value of the random access channel into S1 value intervals, and determining, by the MTC UEs, the set that should belong to the interval segment in which the coverage enhancement target value of the random access channel to be supported is located .
  • the random access channel configuration message sent to the MTC UEs includes multiple random access channel resource configuration information, and each random access channel resource configuration information includes one or more CEL MTC UEs.
  • the random access channel configuration message includes four random access channel resource configuration information, and each random access channel resource configuration information includes one CEL MTC UEs.
  • the MTC UEs decode the random access channel resource configuration information, at least one of the following information can be obtained:
  • the configuration period of the PRACH allocated for the MTC UEs
  • Configuration information of the subframe occupied by the PRACH allocated for the MTC UEs in the configuration period ; configuration information of the random access sequence allocated for the MTC UEs.
  • the random access sequence allocated for the MTC UEs of the CEL1 is in the Preamble format 0, the length is one subframe, and the PR PR is occupied by six frames.
  • the PRACH allocated for the MTC UEs in one frame is as shown in FIG. 9.
  • the occupied PRBs are PRB7 ⁇ PRB12, PRB3-PRB42, and there are a total of 6 PRACH transmission opportunities.
  • the starting resources are PRACH0, PRACH1, PRACH2, and PRACH3 respectively. , PRACH4, PRACH5.
  • the UE1 is the MTC UE of the CEL1, and the UE1 transmits the resource location of the PRACH occupied by the Preamble in the configuration period of one PRACH, as shown in FIG. That is, PRACH0, PRACH3, and PRACH4.
  • the pre-defined rule is: dividing the coverage enhancement target value of the random access channel into S1 value intervals, and determining, by the MTC UEs, the set that should belong to the interval segment in which the coverage enhancement target value of the random access channel to be supported is located ;
  • CET0 of the PRC of the MTC UEs of the CEL0 is 0 dB
  • 10 minutes of the PRACH of the MTC UEs of the CEL3 ⁇ CET ⁇ 15dB.
  • the random access channel configuration message sent to the MTC UEs includes multiple random access channel resource configuration information, and each random access channel resource configuration information includes one or more CEL MTC UEs.
  • the random access channel configuration message includes four random access channel resource configuration information, and each random access channel resource configuration information includes one CEL MTC UEs.
  • the MTC UEs decode the random access channel resource configuration information, at least one of the following information can be obtained:
  • the configuration period of the PRACH allocated for the MTC UEs
  • Configuration information of the subframe occupied by the PRACH allocated for the MTC UEs in the configuration period ; configuration information of the random access sequence allocated for the MTC UEs.
  • the random access sequence allocated for the MTC UEs of the CEL1 is in the Preamble format 0, the length is one subframe, and the PR PR is occupied by six frames.
  • the PRACH allocated for the MTC UEs in Frame 0 is as shown in Figure 10.
  • the occupied PRBs are PRB7 ⁇ PRB12 and PRB3-PRB42.
  • the starting resources are PRACH0, PRACH1, PRACH2, PRACH3, and PRACH4.
  • PRACH5 the PRACH position assigned to the MTC UEs in other frames is the same as Frame 0.
  • the random access channel resource configuration information further includes the frequency hopping enable indication information
  • the MTC UE of the CEL1 sends the Preamble starting resource to the FrameO Subframe2 PRACH0
  • the CEL1 The MTC UEs can arbitrarily select a group of resources to send Preamble among the following groups of PRACH resources:
  • FrameO Subframe2 PRACHO FrameO Subframe3 PRACH5, Frame 1 Subframe2 PRACH2, Frame 1 Subframe3 PRACH 1 , Frame2 Subframe2 PRACH4; Frame2 Subframe3 PRACH3, Frame3 Subframe2 PRACHO, Frame3 Subframe3 PRACH5;
  • FrameO Subframe2 PRACHO FrameO Subframe3 PRACH5, Frame 1 Subframe2 PRACH2, Frame 1 Subframe3 PRACH5, Frame2 Subframe2 PRACHO; Frame2 Subframe3 PRACH5, Frame3 Subframe2 PRACH2, Frame3 Subframe3 PRACH5;
  • FrameO Subframe2 PRACHO FrameO Subframe3 PRACH5, Frame 1 Subframe2 PRACH2, Frame 1 Subframe3 PRACH5, Frame2 Subframe2 PRACHO; Frame2 Subframe3 PRACH5, Frame3 Subframe2 PRACH2, Frame3 Subframe3 PRACH5;
  • FrameO Subframe2 PRACHO FrameO Subframe3 PRACH1, Frame 1 Subframe2 PRACH2, Frame 1 Subframe3 PRACH3, Frame2 Subframe2 PRACH4; Frame2 Subframe3 PRACH5, Frame3 Subframe2 PRACHO, Frame3 Subframe3 PRACH1.
  • the random access sequence allocated for the MTC UEs of the CEL1 is in the Preamble format 0, the length is one subframe, and the PR PR is occupied by six frames.
  • the PRACH allocated for MTC UEs in Frame 0 is as shown in Figure 11.
  • the occupied PRBs are PRB7 ⁇ PRB12, PRB3-PRB42, and there are 6 PRACH transmission opportunities.
  • the starting resources are PRACHO, PRACH1, PRACH2, PRACH3, PRACH4.
  • PRACH5 the PRACH position assigned to the MTC UEs in other frames is the same as Frame 0.
  • the MTC UEs of the CEL1 may be any of the following groups of PRACH resources. Select a set of resources to send the Preamble: 1. FrameO Subframe2 PRACHO, FrameO Subframe3 PRACH3, Frame 1 Subframe2 PRACH4, Frame 1 Subframe3 PRACH1, Frame2 Subframe2 PRACH2; Frame2 Subframe3 PRACH5, Frame3 Subframe2 PRACHO, Frame3 Subframe3 PRACH3;
  • FrameO Subframe2 PRACHO FrameO Subframe3 PRACH3, Frame 1 Subframe2 PRACH4, Frame 1 Subframe3 PRACH3, Frame2 Subframe2 PRACHO; Frame2 Subframe3 PRACH3, Frame3 Subframe2 PRACH4, Frame3 Subframe3 PRACH3;
  • FrameO Subframe2 PRACHO FrameO Subframe3 PRACHl, Frame 1 Subframe2 PRACH2, Frame 1 Subframe3 PRACH3, Frame2 Subframe2 PRACH4;
  • Frame2 Subframe3 PRACH5 Frame3 Subframe2 PRACHO, Frame3 Subframe3 PRACHl;
  • FrameO Subframe2 PRACHO FrameO Subframe3 PRACH1, Frame 1 Subframe2 PRACH2, Frame 1 Subframe3 PRACH3, Frame2 Subframe2 PRACH4; Frame2 Subframe3 PRACH5, Frame3 Subframe2 PRACH2, Frame3 Subframe3 PRACH3.
  • MTC UEs and non-MTC UEs there are MTC UEs and non-MTC UEs in the wireless system, and the MTC UEs are divided into S1 sets according to a predefined rule.
  • the pre-defined rule is: dividing the coverage enhancement target value of the random access channel into S1 value intervals, and determining, by the MTC UEs, the set that should belong to the interval segment in which the coverage enhancement target value of the random access channel to be supported is located .
  • CET0 of the PRC of the MTC UEs of CEL0 is 0 dB
  • the random access channel configuration message of the PRACH includes the random access channel resource configuration information, and the MTC UEs can obtain at least one of the following information after decoding the random access channel resource configuration information:
  • the configuration period of the PRACH resources of the MTC UEs
  • the random access sequence allocated for the MTC UEs is in the Preamble format 0, and the length is one subframe, and the number of the PRACHs is six frames.
  • the configuration period of the PRACH allocated for the MTC UEs is one frame. In a frame, the PRACH allocated for MTC UEs is as shown in Figure 2.
  • the occupied PRB is PRB7 ⁇ PRB12, and there are 4 PRACH transmission opportunities.
  • the starting resources are PRACH0 PRACH1 PRACH2 PRACH3.
  • the random access channel resource configuration information further includes the frequency hopping enable indication information
  • the PRACH allocated for the MTC UEs in one PRACH configuration period is as shown in FIG. 3, and each PRACH
  • the starting PRB resource location of the sending opportunity, " is calculated as follows:
  • PRB offset is the PB offset amount.
  • the MTC UE sends the first subframe in the configuration period of one PRACH.
  • the random access sequence is not the same.
  • the first subframe is a subframe in which the PRACH resource is allocated to the MTC UE in the configuration period of the PRACH.
  • the index of the random access sequence transmitted in the first subframe is determined by at least one of: an index of the first subframe;
  • the index of the random access sequence selected by the MTC UE is the index of the random access sequence selected by the MTC UE.
  • the predefined rule used is determined by the random access sequence hopping rule indication information allocated for the MTC UE.
  • the MTC UE when the random access channel resource configuration information further includes a random access sequence hopping enable indication information, and the indication information is enabled, the MTC UE is used in the same PRACH configuration period.
  • the random access sequence is the same, and the random access sequence used by the MTC UE is different between the configuration periods of the adjacent PRACHs.
  • An embodiment of the present invention provides a random access sequence transmission apparatus.
  • the structure of the apparatus is as shown in FIG. 12, and includes:
  • the configuration sending module 1201 is configured to: send a random access channel configuration message, where the random access channel configuration message includes at least a random access channel resource configuration information of the third node.
  • the third node is one or more p ,? a collection of second nodes, the device further comprising:
  • the resource management module 1202 is configured to: divide the second node into J sets according to a first predefined rule, and each set is defined as 75 ( , wherein, 7 - 1 , J is a positive integer greater than or equal to 1 And dividing the second node in the ⁇ ( ⁇ ') into a subset according to a second predefined rule, where each subset defines ⁇ the number of subsets that need to be divided into sets, ⁇ (_/') ⁇ ⁇ , ⁇ ⁇ ⁇ ⁇ ( ⁇ ) - 1.
  • the design of the random access channel of the MTC is taken as an example.
  • the technical solution provided by the embodiment of the present invention is also applicable, and is no longer used herein. Narration.
  • the embodiment of the present invention provides a random access sequence transmission method, and the process of completing the random access sequence transmission by using the method is as follows:
  • the second node is divided into J sets according to the first predefined rule, and each set is defined as P (wherein, ⁇ J- 1 , J is a positive integer greater than or equal to 1.
  • the second node in the ⁇ ( ⁇ ') is divided into subsets according to a second predefined rule, and each subset defines ⁇ as the number of subsets that the set needs to be divided, ⁇ (_/') ⁇ ⁇ , ⁇ ⁇ ⁇ ⁇ ( ⁇ ) - 1.
  • the third node is a set of one or more p(s) , the second node.
  • the first predefined rule is one of the following:
  • the number of repeated transmissions required for the second node to successfully decode the physical broadcast channel (PBCH) is divided into J value intervals, and the second node determines that it should be based on the interval segment in which the number of repetitions of the PBCH is successfully decoded when the PBCH is successfully decoded.
  • the number of repeated transmissions required for successfully decoding the primary information block (MIB) by the second node is divided into J value intervals, and the second node determines that it should be based on the interval segment in which the number of repetitions of the MIB is successfully decoded by the MIB. a collection of belongings ⁇ ;
  • SIB system information block
  • the number of repeated transmissions required for the second node to successfully decode the secondary synchronization signal (SSS) is divided into J value intervals, and the second node is located according to the number of repetitions of the SSS when the SSS is successfully decoded. Interval, determine the set P (which should belong to).
  • the second predefined rule is:
  • the second node in the set ( ⁇ 7') measures the signal quality of the reference signal, and according to the interval segment in which the signal quality of the measured reference signal is located, Determine which subset 7 ⁇ ' it should belong to? ).
  • the predefined reference signal is at least one of the following:
  • the channel status indicates a reference signal (CSI-RS).
  • CSI-RS reference signal
  • the signal quality is at least one of the following:
  • RSRP Reference signal received power
  • RSSI Received Signal Strength Indication
  • the uplink signal to noise ratio of the second node is the uplink signal to noise ratio of the second node.
  • the number of repetitions of the PBCH is greater than a predefined threshold
  • the number of repetitions of ⁇ is greater than a predefined threshold
  • the number of repetitions of the SIB is greater than a predefined threshold
  • the number of repetitions of the PSS is greater than the predefined Threshold value
  • the number of repetitions of the SSS is greater than a predefined threshold
  • the number of repetitions of the CSI-RS is greater than a predefined threshold.
  • the random access channel resource configuration information further includes at least one of the following: a threshold value of the number of repetitions of the PBCH;
  • the threshold value of the number of repetitions of the CSI-RS is the threshold value of the number of repetitions of the CSI-RS.
  • mapping relationship between the signal quality interval segment of the reference signal and the belonging subset is configured by the first node or configured by the system.
  • the method further includes:
  • the second node in the subset adjusts the transmit power when transmitting random access signaling.
  • adjusting the transmit power when the second node in the subset ⁇ ( ⁇ , ) transmits the random access signaling includes at least one of the following:
  • the second node in the subset P(J, q) After the second node in the subset P(J, q) sends the random access signaling, and does not receive the random access response message sent by the first node, the second node increases the random transmission. Transmit power when accessing signaling.
  • the transmit power when the second node in the subset sends the random access signaling is not configured according to the maximum transmit power
  • the number of subsets in the set ⁇ ( ⁇ ) in which the subset is located is greater than one.
  • the first node sends a random access channel configuration message, where the random access channel configuration message includes at least the random access channel resource configuration information of the third node.
  • the random access channel resource configuration information includes at least one of the following: a configuration period of a random access channel resource allocated to the third node;
  • the random access sequence hopping rule indication information allocated for the third node is allocated for the third node.
  • the third node is one or more subsets of the second node.
  • the second node is divided into S1 subsets according to a predefined rule, and S1 is a positive integer greater than or equal to 1, and the predefined rule is at least one of the following:
  • the second node determines the subset to which the coverage group belongs according to the interval segment in which the coverage enhancement target value needs to be supported;
  • the coverage enhancement target value of the random access channel is divided into S1 value intervals, and the second node determines the subset that should belong according to the interval segment in which the coverage enhancement target value of the random access channel to be supported is located;
  • the coverage enhancement target value of the Msgl message is divided into S1 value intervals, and the second node determines, according to the interval segment in which the coverage enhancement target value of the random access channel that needs to be supported, that the Msgl message needs to be sent repeatedly.
  • the number of times is divided into S1 value intervals, and the second node determines the subset to which the Msgl message needs to be transmitted according to the number of times the Msgl message needs to be repeatedly transmitted;
  • the number of times that the random access sequence needs to be repeatedly transmitted is divided into S1 value intervals, and the second node determines the subset to which the random access sequence needs to be transmitted according to the number of times that the random access sequence needs to be repeatedly transmitted;
  • the number of repetitions required for the second node to successfully decode the physical broadcast channel (PBCH) is divided into S1 value intervals, and the second node determines that it should be based on the interval segment in which the number of repetitions of the PBCH is successfully decoded. a subset of belongings;
  • the number of repetitions required for the second node to successfully decode the system information block SIB is divided into S1 value intervals, and the second node determines that it should belong according to the interval segment in which the number of repetitions of the SIB is successfully decoded by the SIB. Subset;
  • the number of repetitions required for the second node to successfully decode the primary synchronization signal PSS is divided into S1 value intervals, and the second node determines, according to the interval segment in which the number of repetitions of the PSS is successfully decoded, the node should belong to Subset;
  • the number of repetitions required for the second node to successfully decode the secondary synchronization signal SSS is divided into S1 value intervals, and the second node determines that it should belong according to the interval segment in which the number of repetitions of the SSS is successfully decoded. Subset.
  • the PRACH used by the third node to send the random access sequence occupies the same frequency domain resource in different first subframes.
  • the PRACH used by the third node to send the random access sequence occupies the same frequency domain resource in different first subframes.
  • multiple PRACH resources are configured in the same first subframe, and the frequency domain resources occupied by the PRACH resources configured in the different first subframes are not completely
  • the PRACH used by the third node to send the random access sequence occupies the same frequency domain resource in different first subframes.
  • the first subframe is a subframe in which the third node is allocated with a PRACH resource.
  • the indication information of the hopping enable parameter of the random access channel resource allocated for the third node is frequency hopping enable, or the random access channel allocated for the third node is enabled by default, the frequency hopping is predefined.
  • the PRB resource phase occupied by the random access channel allocated to the third node in the first subframe in the time window Similarly, the random access channel allocated to the third node in the first subframe between two consecutive predefined time windows occupies different PRB resources.
  • the random access channel allocated for the third node is occupied within the predefined time window.
  • PRB is the starting PRB resource index
  • PRB.ffset is the PRB offset, which is the total number of PRBs occupied by the uplink, and N ⁇ is the number of PRBs occupied by one PRACH.
  • • ⁇ A is the index of the PRACH resource, or the frame index number, or the configuration period number of the PRACH, or the subframe number where the starting PRB of the PRACH resource is located.
  • K is a positive integer.
  • the PRB resources of the random access channel allocated for the third node are spaced apart by a predefined number of PRBs in the frequency domain.
  • the initial PRB resource occupied by the random access channel allocated for the third node, B is calculated according to the following expression:
  • L ffset is the PRB offset
  • the index of the PRACH resource or the frame index number, or the configuration period number of the PRACH, or the subframe number where the starting PRB of the PRACH resource is located.
  • K is a positive integer
  • P is a positive integer
  • B is the frequency hopping interval.
  • one PRACH is selected from the multiple PRACHs according to a predefined rule, and is selected.
  • a random access sequence is transmitted on the PRACH.
  • the selected PRACHs in the different first subframes occupy different frequency domain resources.
  • the frequency domain resources occupied by the PRACH selected in the different first subframes are partially or completely different.
  • the N first subframes select the same PRB resource.
  • the adjacent two sets of N first subframes select PRACH resources according to a predefined rule, where N is a positive integer greater than or equal to 1.
  • the predefined rule includes at least one of the following:
  • the index of the selected PRACH adjacent to the two sets of N first subframes is adjacent;
  • the PRB resources corresponding to the PRACH selected by the two adjacent N first subframes have the largest difference in the frequency domain
  • the PRB resources corresponding to the PRACH selected by the two adjacent N first subframes have the smallest difference in the frequency domain
  • the difference in the frequency domain of the PRB resource corresponding to the PRACH selected by the two adjacent N subframes is configured by the first node or configured by the system.
  • the third node is allocated by using the third node.
  • the frequency hopping pattern indication information of the random access channel resource determines the hopping pattern used.
  • the third node in the first subframe in the predefined time window sends a random access sequence. Some or all of them are different.
  • the third node is sent in the first subframe in the predefined time window.
  • the index of the random access sequence is determined by at least one of the following:
  • the third node determines that the index of the random access sequence sent in the first subframe has multiple predefined rules
  • the third node is determined by the third node.
  • the assigned random access sequence hopping rule indicates that the information determines the predefined rule to use.
  • the random access sequence allocated to the third node in the predefined time window is the same, and two consecutive predefined The random access sequence assigned to the third node between time windows is different.
  • the index of the random access sequence sent by the third node is determined by at least one of the following:
  • the predefined time window refers to at least one of the following:
  • the configuration period of the K1 subframes, the K2 frames, and the K3 random access channel resources where K1, K2, and K3 are positive integers greater than or equal to 1, and the value is configured by the first node or configured by the system.
  • the second node is at least one of the following:
  • D2D device-to-device
  • the system configuration refers to a standard configuration or a network configuration or a network high layer configuration.
  • the first node is at least one of the following:
  • a macro base station a micro cell, a pico cell, a femto cell, a home base station, a low power node (LPN), and a relay station.
  • LPN low power node
  • the embodiment further provides a computer program comprising program instructions that, when executed by the first node, cause the first node to perform the above method.
  • This embodiment also provides a carrier carrying the above computer program.
  • An embodiment of the present invention provides a method and an apparatus for transmitting a random access sequence, where a first node sends a random access channel configuration message, where the random access channel configuration message includes at least a random access channel resource configuration of a third node.
  • the information implements a higher random access performance of the MTC UE, and solves the problem that the random access signaling transmitted by the MTC UE in a harsh environment can be correctly detected by the eNB.
  • all or part of the steps of the foregoing embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.
  • the invention is not limited to any particular combination of hardware and software.
  • the devices/function modules/functional units in the above embodiments may be implemented by using a general-purpose computing device, which may be concentrated on a single computing device or distributed among multiple computing devices. On the network.
  • Each device/function module/functional unit in the above embodiments can be stored in a computer readable storage medium when implemented in the form of a software function module and sold or used as a standalone product.
  • the above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
  • the present invention implements a higher random access performance of the MTC UE, and solves the problem that the random access signaling transmitted by the MTC UE in a harsh environment can be correctly detected by the eNB.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne, dans certains modes de réalisation, un procédé et un appareil d'émission de séquences d'accès aléatoire lié au domaine des communications, et résolvent le problème de l'exactitude de détection par un nœud B évolué (eNB) d'une signalisation d'accès aléatoire émanant d'un équipement d'utilisateur pour communications de type machine (MTC UE) dans un environnement hostile. Le procédé comprend l'étape suivante: un premier nœud émet un message de configuration de canal d'accès aléatoire qui comporte au moins des informations de configuration de ressources de canal d'accès aléatoire d'un troisième nœud.
PCT/CN2014/000702 2014-04-17 2014-07-24 Procédé et appareil d'émission de séquences d'accès aléatoire WO2015157879A1 (fr)

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