WO2016000188A1 - 接入控制装置、接入装置及方法 - Google Patents
接入控制装置、接入装置及方法 Download PDFInfo
- Publication number
- WO2016000188A1 WO2016000188A1 PCT/CN2014/081304 CN2014081304W WO2016000188A1 WO 2016000188 A1 WO2016000188 A1 WO 2016000188A1 CN 2014081304 W CN2014081304 W CN 2014081304W WO 2016000188 A1 WO2016000188 A1 WO 2016000188A1
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- WIPO (PCT)
- Prior art keywords
- terminal
- group
- captured
- preamble sequence
- receiving
- Prior art date
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/02—Access restriction performed under specific conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/002—Transmission of channel access control information
Definitions
- Access control device Access control device, access device and method
- the present invention relates to the field of communications, and in particular, to an access control device, an access device, and a method. Background technique
- Machine-to-Machine (M2M) technology is a networked application and service with machine as the terminal and intelligent interaction as the core.
- M2M technology enables machine-to-machine collaboration through data transfer between machines and machines, greatly increasing productivity.
- M2M services represented by smart meter reading, vehicle condition monitoring, vehicle networking, industrial monitoring, etc. have gradually become popular application businesses.
- the main features of M2M technology are: There are a large number of terminals; different terminals use small data packet services for communication; different terminals use non-continuous transmission mode for communication, which requires low delay. Therefore, the Universal Mobile Telecommunications System (UMTS) is a communication system commonly used to implement M2M technology. When communicating between different terminals, it is transmitted by UMTS.
- the UMTS can work in the CELL_FACH or Enhanced CELL_FACH Radio Resource Control (RRC) connection state of the FACH Forward Access Channel (FACH) for the small data packet service, and the terminal can be in the random access channel. (Random Access Channel, RACH for short) transmits data.
- RRC Radio Resource Control
- the terminal when the terminal needs to perform data transmission, the terminal first applies for the access resource of the network, and uses the access resource to send data after applying for the access resource; releasing the access resource after the data transmission ends, thereby enabling the UTMS to access Resources are used efficiently.
- the terminal Since data is transmitted on the RACH, the terminal usually requests the use of the access resource by transmitting a preamble sequence. Specifically, when data needs to be transmitted, the terminal first sends a preamble sequence on an Access Slot (AS) boundary. The base station detects the preamble sequence, and sends an Acquisition Indicator (AI) to the terminal when detecting the preamble sequence sent by the terminal and having available access resources. If the terminal receives the AI within a predetermined time after the preamble sequence is transmitted, the terminal transmits data after receiving the AI_timing. If the terminal does not receive the AI within a predetermined time after the preamble sequence is sent, the preamble sequence is retransmitted at the next AS boundary, and the access resource is requested again.
- AS Access Slot
- AI Acquisition Indicator
- the base station may receive a large number of terminals to transmit the preamble sequence at the same time, causing the base station to be overloaded.
- the present invention provides an access control apparatus, where the apparatus includes: a receiving unit, configured to receive a first preamble sequence sent by a group terminal in a terminal group; The first preamble sequence received by the receiving unit determines the captured terminal group; the sending unit is configured to send a first acquisition indication to the terminal in the captured terminal group determined by the determining unit; And a second preamble sequence that is sent by the terminal in the captured terminal group after receiving the first acquisition indication sent by the sending unit; the determining unit is further configured to receive according to the receiving unit The second preamble sequence to determine the captured terminal; the sending unit is further configured to send a second capture indication to the captured terminal determined by the determining unit, where the second capture indication is used to indicate the Accessed by the captured terminal.
- the receiving unit configured to receive a first preamble sequence sent by a group terminal in a terminal group, includes: the receiving unit, And a first preamble sequence for receiving a group identifier sent by the group leader terminal through the physical random access channel PRACH and including the terminal group.
- the sending unit is configured to determine, in the group of the captured terminal that is determined by the determining unit And sending, by the terminal, the first acquisition indication, the sending unit, configured to send, by using the capture indicator channel AICH, the first capture indication that includes the group identifier of the captured packet.
- the receiving unit is further configured to receive the The second preamble sequence that is sent by the terminal in the captured terminal group after receiving the first acquisition indication sent by the sending unit, includes: the receiving unit, configured to receive the The terminal receives the first capture A second preamble sequence including the signature sequence of the terminal transmitted through the PRACH after indication.
- the sending unit is further configured to send the second acquisition indication to the captured terminal that is determined by the determining unit, where the sending unit is further configured to send, by using an AICH, a location that includes a signature sequence of the captured terminal.
- the second capture indication is described.
- the present invention further provides an access device, where the device includes: a receiving unit, configured to receive a first capture indication that is sent by a base station and includes a group identifier of the captured packet, and a sending unit, where And transmitting, by the receiving unit, the group identifier of the captured packet to the group identifier of the terminal group where the terminal is located, sending, to the base station, a second preamble sequence including a signature sequence of the terminal; And a second capture indication that includes the signature sequence of the captured terminal that is sent by the base station after determining the captured terminal according to the second preamble sequence; the sending unit is further configured to be in the receiving unit And when the received signature sequence of the captured terminal matches the signature sequence of the terminal, the data is sent to the base station.
- the receiving unit configured to receive, by the base station, a first capture indication that includes a group identifier of the captured packet, including: the receiving a unit, configured to receive the first capture indication by using an acquisition indicator channel AICH.
- the apparatus further includes: a generating unit, configured to generate the first preamble sequence that includes a group identifier of the terminal group;
- the sending unit is further configured to send the first preamble sequence by using a physical random access channel (PRACH), and the receiving unit is configured to receive, by the base station, a first capture indication that includes a group identifier of the captured packet, where: a receiving unit, configured to receive, by using an AICH, the first acquisition indication, where the first acquisition indication is sent by the base station after determining the captured packet according to the first preamble sequence.
- PRACH physical random access channel
- the generating unit includes: a determining subunit, configured to determine a group identifier and a location of the terminal grouping a signature sequence of the terminal, the group identifier of the terminal group is a Had code sequence of a predetermined length; a generating subunit, configured to generate the first group of the group identifier grouped by the terminal and the signature sequence of the terminal Lead sequence.
- the sending unit is further configured to When the signature sequence of the captured terminal does not match the signature sequence of the terminal, the first preamble sequence is retransmitted to the base station.
- the present invention further provides an access control manner, where the method includes: receiving a terminal grouping a first preamble sequence transmitted by the group leader terminal; determining a captured terminal group according to the first preamble sequence; transmitting a first acquisition indication to a terminal in the captured terminal group; receiving a terminal in the terminal group a second preamble sequence transmitted after receiving the first acquisition indication; determining a captured terminal according to the second preamble sequence; transmitting a second acquisition indication to the captured terminal, where the second acquisition indication is used to indicate The captured terminal is accessed.
- the first preamble sequence sent by the group terminal in the receiving terminal group includes: receiving the group long terminal by using physical random access
- the channel PRACH transmits and includes a first preamble sequence of the group identity of the terminal packet.
- the sending, by the terminal in the captured terminal, the first acquisition indication includes: The first capture indication containing the group identity of the captured packet is sent.
- the receiving the terminal in the captured terminal group includes: receiving, after receiving, by the terminal in the captured packet, the second sequence of the signature sequence of the terminal that is sent by using the PRACH Lead sequence.
- the transmitting the second acquisition indication to the captured terminal includes transmitting, by the AICH, the second capture indication that includes a signature sequence of the captured terminal.
- the present invention provides an access method, the method includes: receiving, by a base station, a first acquisition indication that includes a group identifier of a captured packet; and if the group identifier of the captured packet is And transmitting, by the base station, a second preamble sequence including a signature sequence of the terminal to the base station; and receiving, by the base station, the And acquiring a second acquisition indication of the signature sequence of the terminal; if the signature sequence of the captured terminal is consistent with the signature sequence of the terminal, transmitting data to the base station.
- the group identifier first capture indication that is sent by the receiving base station and includes the captured packet includes: receiving, by using an indicator channel, AICH, Determining, by the base station, that the first acquisition indication is sent by the base station according to the first preamble sequence, where the first preamble sequence is used by the group long terminal in the terminal group to pass the physical random access channel PRACH is sent.
- the method before the receiving, by the receiving base station, the first capture indication that includes the group identifier of the captured packet, the method further includes: generating, by using the terminal group The first preamble sequence of the group identity; the first preamble sequence is sent by the PRACH; the group identity first capture indication that is sent by the receiving base station and includes the captured packet includes: receiving the first capture by using an AICH Instructing, the first acquisition indication is sent by the base station after determining the captured packet according to the first preamble sequence.
- the generating, by the first preamble sequence that includes the group identifier of the terminal group, a group identifier and a signature sequence of the terminal, the group identifier of the terminal group is a Had code sequence of a predetermined length; generating the first preamble sequence formed by the group identifier grouped by the terminal and the signature sequence of the terminal .
- the method further includes: if the The signature sequence of the terminal is inconsistent with the signature sequence of the terminal, and the first preamble sequence is retransmitted to the base station.
- a receiving unit is configured to receive a first preamble sequence sent by a group terminal in a terminal group, and a determining unit, configured to determine, according to the first preamble sequence received by the receiving unit, a receiving terminal group, configured to send a first acquisition indication to a terminal in the captured terminal group determined by the determining unit, where the receiving unit is further configured to receive a terminal in the captured terminal group Receiving a second preamble sequence that is sent after the first acquisition indication sent by the sending unit; the determining unit is further configured to determine a captured terminal according to the second preamble sequence received by the receiving unit; The sending unit is further configured to send a second acquisition indication to the captured terminal determined by the determining unit, where the second acquisition indication is used to indicate that the captured terminal accesses.
- the process of the terminal competing for accessing resources changes from one-stage competition to two-stage competition.
- the base station only receives the first preamble sequence sent by each group leader or the second preamble sequence sent by the terminal in the captured packet at a time, which can greatly reduce the base station.
- the number of preamble sequences received is reduced, and the load of the base station is effectively reduced.
- FIG. 1 is a flow chart of an embodiment of an access control apparatus according to the present invention.
- FIG. 2A is a flowchart of another embodiment of an access device according to the present invention.
- FIG. 2B is a flowchart of another embodiment of an access device according to the present invention
- 3 is a flowchart of an embodiment of an access control method according to the present invention
- FIG. 4 is a schematic diagram of an embodiment of an access method according to the present invention
- FIG. 6 is a schematic diagram of another embodiment of an access method according to the present invention
- FIG. 7 is a schematic diagram of another embodiment of an access control apparatus according to the present invention
- all terminals that need to access the target base station can be divided into several terminal groups according to a preset grouping rule.
- the preset grouping rule may be: grouping terminals that transmit the same type of data as one terminal group, or terminals located in the same geographical area as a terminal grouping, or setting a terminal grouping in a network rule.
- a terminal is selected from each terminal group according to a preset selection rule as a group terminal of the terminal group.
- the preset rule may be: selecting any one of the terminals as the group terminal of the terminal group, or selecting the group terminal according to the channel environment of the terminal, or setting the group terminal when the network rule is used.
- the terminal grouping may include only the group terminal, or may include more than one group member terminal in addition to the group terminal.
- Each terminal group has a unique corresponding group identifier, and each terminal also has a corresponding signature sequence.
- the access control device of the present invention will first be described below.
- the access control device may be set in a base station.
- FIG. 1 is a schematic diagram of an embodiment of an access control apparatus according to the present invention.
- the access control apparatus includes: a receiving unit 101, a determining unit 102, and a transmitting unit 103.
- the receiving unit 101 is configured to receive a first preamble sequence sent by the group terminal in the terminal group. [44] In an optional manner, the terminal in the terminal group first passes the physical random access channel (Physical Random Access Channel, short for the group terminal in the terminal group where the terminal is located before performing data transmission.
- Physical Random Access Channel Physical Random Access Channel
- the PRACH transmits a first preamble sequence to compete for access resources for terminals within the terminal group.
- the receiving unit 101 receives the first preamble sequence.
- the first preamble sequence may include a group identifier of the terminal group.
- the first preamble may be composed of a signature sequence of the group terminal and a group identifier of the terminal group.
- the length of the signature sequence of the group terminal may be a preset sequence of 16 bits.
- the group identifier of the terminal packet is composed of a Hadamard sequence which can be N bits long, wherein N is greater than 0, and the length of N is determined by the number of terminal packets and the number of terminals in the terminal packet.
- the sequence of 16+N bits is repeated M times to form a first preamble sequence of 4096 bits, and M is a quotient of 4096 by (16+N).
- a 16-bit queue length terminal signature sequence plus a 16-bit group identifier may be repeated 128 times to form a 4096-bit first preamble sequence.
- the determining unit 102 is configured to determine a captured terminal group according to the first preamble sequence received by the receiving unit 101.
- the receiving unit 101 may receive one or more first preamble sequences within a certain time.
- the determining unit 102 may group the terminals corresponding to the first preamble sequence into Capture the packet.
- the determining unit 102 may determine, according to a predetermined determining rule, a first terminal sequence corresponding to the terminal group according to the received signal to noise ratio of the first preamble sequence.
- the packet is captured.
- the sending unit 103 is configured to send a first capture indication to the terminal in the captured terminal group determined by the determining unit 102.
- the transmitting unit 103 acquires the group identifier of the captured packet from the first preamble sequence, and then generates and transmits a first capture indication including the group identifier of the captured packet.
- the sending unit 103 may send the first acquisition indication to each terminal by using the AICH.
- the sending unit 103 may set the group identifier to be sent on the 1024 chips reserved by the AICH.
- the group identifier of the captured packet of length N bits may be repeated per bit to form a sequence of 2N bits long, and then the captured packet is acquired by using the same spreading factor and modulation method as the existing AICH.
- the group ID is sent.
- the receiving unit 101 is further configured to receive, by the terminal in the terminal group, the sending unit.
- the terminal within the captured packet also needs to contend for access resources.
- the terminal within the captured packet may contend for the access resource by transmitting a second preamble sequence, where the second preamble sequence includes the signature sequence of the terminal.
- the receiving unit 101 receives a second preamble sequence transmitted by each terminal.
- the determining unit 102 is further configured to determine the captured terminal according to the second preamble sequence received by the receiving unit 101.
- the determining unit 102 determines the process of the captured terminal according to the second preamble sequence, which is similar to the method for determining the accessible terminal according to the preamble sequence in the prior art, and details are not described herein again.
- the transmitting unit 103 is further configured to send a second capture indication to the captured terminal determined by the determining unit 102, where the second capture indication is used to indicate that the captured terminal accesses.
- the sending unit 103 sends, by using the AICH, a signature sequence second capture indication that includes the captured terminal.
- the second acquisition indication is similar to the transmission method of the capture indication in the prior art, and will not be described again here.
- the captured terminal receives the second acquisition indication and is separated by a predetermined time, the data that it needs to transmit is transmitted through the PRACH.
- the base station receives data transmitted by the captured terminal through the PRACH. The specific process is similar to the method of terminal access in the prior art, and will not be described here.
- the access control apparatus may receive a first preamble sequence sent by a group leader terminal in a terminal group; determine a captured terminal group according to the first preamble sequence; Transmitting, by the terminal in the terminal group, a first acquisition indication; receiving a second preamble sequence sent by the terminal in the terminal group after receiving the first acquisition indication; determining, according to the second preamble sequence, a captured terminal; The captured terminal sends a second acquisition indication, where the second acquisition indication is used to indicate that the captured terminal is accessed.
- the process of the terminal competing for accessing resources from one competition to two competitions, can not only reduce the total number of preamble sequences received by the base station, but also reduce the maximum number of preamble sequences that the base station may receive at the same time. Thereby, the load of the base station can be effectively reduced.
- the reduction in the number of preamble transmissions can also reduce the energy consumed during the data transmission process.
- the access device can be set in the terminal.
- [57] 2A is a schematic diagram of an embodiment of the inventive access device.
- the access device includes: The receiving unit 201 and the transmitting unit 202 are received.
- the receiving unit 201 is configured to receive a first capture indication that is sent by the base station and includes a group identifier of the captured packet.
- the receiving unit 201 may directly include, by using an AICH, the first acquisition indication, where the first acquisition indication is sent by a base station according to a group terminal that is configured by the terminal where the terminal is located.
- the first preamble sequence is determined to be generated and transmitted after the packet is captured.
- the sending unit 202 is configured to: when the group identifier of the captured packet received by the receiving unit 201 is consistent with the group identifier of the terminal group where the terminal is located, send the terminal signature sequence to the base station.
- the second preamble sequence is configured to: when the group identifier of the captured packet received by the receiving unit 201 is consistent with the group identifier of the terminal group where the terminal is located, send the terminal signature sequence to the base station. The second preamble sequence.
- the group identifier of the captured packet is consistent with the group identifier of the terminal group, it indicates that the terminal in the terminal group can perform data transmission in the current data transmission time slot. However, since the terminal cannot determine whether there are other terminals in the terminal group that need to perform data transmission, in order to prevent collision, the terminal needs to compete with other group member terminals in the terminal group to access the access resources, so the sending unit 202 needs to send the second. The preamble sequence competes for access resources. [63] If the group identifier of the captured packet is inconsistent with the group identifier of the terminal packet, it indicates that in the secondary data transmission time slot, the terminal in the terminal packet cannot perform data transmission. At this time, the receiving unit 201 needs to wait to receive the first capture indication again.
- the receiving unit 201 is further configured to receive, by the base station, a second sequence that includes the signature sequence of the captured terminal that is sent after the base station determines the captured terminal according to the second preamble sequence sent by the sending unit 202. Capture indication.
- the base station sends the second capture indication by using the AICH, and the receiving unit 201 receives the second capture indication.
- the specific transmission process of the second capture indication has been described in the foregoing embodiment and will not be described here.
- the sending unit 202 is further configured to: when the signature sequence of the captured terminal received by the receiving unit is consistent with the signature sequence of the terminal, send data to the base station.
- the signature sequence of the captured terminal is consistent with the signature sequence of the terminal, it indicates that the terminal competes for the access resource successfully, and the data transmission may be performed. After the predetermined duration specified by the protocol, the sending unit 202 may pass. PRACH sends data.
- FIG. 2B it is a schematic diagram of another embodiment of an access device of the present invention.
- the access device if the access device is used to implement the terminal terminal access in the terminal group, the access device further includes: a generating unit 203, in addition to the receiving unit 201 and the sending unit 202. .
- the generating unit 203 is configured to generate the first preamble sequence that includes the group identifier of the terminal group.
- the first preamble sequence is first generated by the generating unit 203, where the first preamble sequence may include a group identifier of the terminal grouping.
- the first preamble may be composed of a group leader terminal signature sequence and a group identifier of the terminal group.
- the sending unit 202 is further configured to send the first preamble sequence by using a PRACH.
- the sending unit 202 sends the first preamble sequence to the base station by using the PRACH, and all the terminals in the terminal group compete for access resources.
- the receiving unit 201 is further configured to receive the first acquisition indication by using an AICH. Similarly, the first acquisition indication is sent by the base station by using the AICH after determining the captured packet according to the first preamble sequence.
- the sending unit 202 needs to send the first preamble sequence again, and the terminal in the terminal group contends for the access resource. It should be noted that the sending interval of the first preamble sequence sent by the sending unit 202 must be greater than or equal to the sending time interval between the preamble sequence and the preamble sequence specified by the protocol in the existing PRACH procedure. . That is: t > t.
- the group leader terminal may raise the transmission power of the first preamble sequence when transmitting the first preamble sequence again.
- the leader terminal may repeatedly transmit the transmit power to repeatedly transmit the first preamble sequence until the group identifier of the captured packet matches the group identifier of the terminal packet or reaches the maximum allowed number of transmissions.
- the process of the terminal competing for accessing resources can not only reduce the total number of preamble sequences received by the base station, but also reduce the preamble sequence that the base station may receive simultaneously.
- the maximum number can effectively reduce the load on the base station.
- the reduction in the number of transmissions of the preamble sequence can also reduce the energy consumed by the data transmission process.
- the access control method of the present invention can be performed by a base station in a UTMS system.
- Step 301 Receive a first preamble sequence sent by the group terminal in the terminal group.
- the terminal Before performing data transmission, the terminal first sends a first preamble sequence through the PRACH by the group leader terminal in the terminal group where the terminal is located, so that the terminal competes for access resources.
- the first preamble sequence may include a group identifier of the terminal grouping.
- the first preamble may be composed of a group leader terminal signature sequence and a group identifier of the terminal group. The structure and manner of generation of the first preamble sequence have been described in the foregoing embodiments and will not be described again.
- Step 302 Determine a captured packet according to the first preamble sequence.
- the base station may receive one or more first preamble sequences within a certain period of time.
- the first preamble sequence may be used.
- the corresponding terminal is grouped into captured packets.
- one of the first preamble sequence corresponding terminal groups may be selected as the captured packet according to a predetermined determination rule, for example, according to the received signal to noise ratio of the first preamble sequence.
- Step 303 Send a first capture indication to the terminal in the captured terminal group.
- the base station may first acquire the group identifier of the captured packet from the first preamble sequence sent by the leader terminal of the captured packet, and then generate the first group identifier including the captured packet.
- the indication is captured and sent for the first capture indication.
- the base station may send the first acquisition indication to each terminal through the AICH.
- the first acquisition indication may be sent on the 1024 chips reserved by the AICH.
- the first acquisition indication of length N bits may be repeated every bit to form a sequence of 2N bits long, and then spread transmission is performed using the same OVSF code with a spreading factor of 1024 /N as the existing AICH.
- Step 304 Receive a second preamble sequence sent by the terminal in the terminal group after receiving the first acquisition indication.
- the terminal within the captured packet also needs to compete for access resources.
- the terminal in the captured packet may use the second preamble sequence to compete for access resources.
- the source, wherein the second preamble sequence comprises a signature sequence of the terminal.
- the base station receives the second preamble sequence sent by each terminal.
- Step 305 Determine a captured terminal according to the second preamble sequence.
- Step 306 Send a second acquisition indication to the captured terminal, where the second acquisition indication is used to indicate that the captured terminal is accessed.
- the base station transmits a signature sequence second capture indication including the captured terminal through the AICH.
- the second capture indication is similar to the transmission method of the first capture indication, and will not be described again here.
- the data that it needs to transmit is transmitted through the PRACH.
- the base station receives data transmitted by the captured terminal through the PRACH.
- the specific process is similar to the method of data reception in the prior art, and will not be described here. It should be noted that the foregoing step 104 to step 106 are similar to the terminal random access procedure in the prior art. For details, refer to the terminal random access procedure in the prior art.
- the access control apparatus may receive a first preamble sequence sent by a group leader terminal in a terminal packet; determine a captured terminal group according to the first preamble sequence; Transmitting, by the terminal in the terminal group, a first acquisition indication; receiving a second preamble sequence sent by the terminal in the terminal group after receiving the first acquisition indication; determining, according to the second preamble sequence, a captured terminal; The captured terminal sends a second acquisition indication, where the second acquisition indication is used to indicate that the captured terminal is accessed.
- the process of the terminal competing for accessing resources from one competition to two competitions, can not only reduce the total number of preamble sequences received by the base station, but also reduce the maximum number of preamble sequences that the base station may receive at the same time. Thereby, the load of the base station can be effectively reduced.
- the reduction in the number of preamble transmissions can also reduce the energy consumed during the data transmission process.
- FIG. 4 is a flowchart of another embodiment of a method for accessing a terminal in a terminal group according to the present invention. The method includes the following steps:
- Step 401 Receive a first capture indication that is sent by the base station and includes a group identifier of the captured packet.
- the method further includes: competing for accessing the resource by the terminal in the terminal group: generating a group identifier including the terminal group Said a first preamble sequence; transmitting the first preamble sequence by PRACH.
- the first acquisition indication is generated and transmitted by the base station after determining the captured packet according to the first preamble sequence sent by the terminal.
- the first acquisition indication may be directly received through the AICH, wherein the first acquisition indication is determined by the base station to determine a captured packet according to the first preamble sequence After transmitting, the first preamble sequence is sent by the group leader terminal in the terminal group by PRACH.
- Step 402 If the group identifier of the captured packet is consistent with the group identifier of the terminal group where the terminal is located, send a second preamble sequence including the signature sequence of the terminal to the base station.
- the terminal needs to compete with other group members in the terminal group for accessing resources.
- the manner of competing for accessing resources is to send a second preamble sequence.
- the group leader terminal needs to send the first preamble sequence again, and the terminal in the terminal group contends for accessing resources.
- Step 403 Receive a second capture indication of the signature sequence of the captured terminal that is sent by the base station after determining the captured terminal according to the second preamble sequence.
- the base station may send the second acquisition indication by using the AICH, and the terminal receives the second acquisition indication.
- the specific form and transmission mode of the second capture indication have been described in the foregoing embodiments and will not be described here.
- Step 404 If the signature sequence of the captured terminal is consistent with the signature sequence of the terminal, send data to the base station.
- the signature sequence of the captured terminal is consistent with the signature sequence of the group member terminal, it indicates that the terminal competes for the access resource successfully, can perform data transmission, and transmits data through the PRACH after a predetermined period of time elapses.
- the process of the terminal competing for accessing resources is changed from one competition to two competitions, thereby greatly reducing the number of preamble sequences received by the base station, thereby effectively reducing the base station. Load.
- FIG. 5 is a flowchart of another embodiment of an access method according to the present invention, where the method includes the following steps:
- Step 501 The first acquisition indication is received by the AICH, where the first acquisition indication is sent by the base station according to the first preamble sequence, and the first preamble sequence is grouped by the terminal.
- the leader terminal is sent via PRACH.
- Step 502 If the group identifier of the captured packet is consistent with the group identifier of the terminal group, send a second preamble sequence to the base station by using a PRACH, where the second preamble sequence includes the group member terminal. Signature sequence.
- Step 503 Receive, by the AICH, a second acquisition indication, where the acquisition indication is sent by the base station after determining the captured terminal according to the second preamble sequence, where the second acquisition indication includes a signature sequence of the captured terminal.
- Step 504 If the signature sequence of the captured terminal is consistent with the signature sequence of the group member terminal, the data is sent by PRACH.
- the process of the terminal competing for accessing resources is changed from one competition to two competitions, thereby greatly reducing the number of preamble sequences received by the base station, thereby effectively reducing the base station. Load.
- the reduction in the number of transmissions of the preamble sequence can also reduce the energy consumed by the data transmission process.
- FIG. 6 is a flowchart of another embodiment of an access method according to the present invention.
- the method includes the following steps: [118] 601: Generate a first preamble sequence including a group identifier of a terminal group. [119] 602. Send a first preamble sequence by using PRACH.
- [120] 603. Receive, by using an AICH, a group identity first acquisition indication that includes the captured packet, where the first acquisition indication is sent by the base station according to the first preamble sequence to determine the captured packet, and then sent by using the AICH.
- the group leader terminal needs to send the first preamble sequence again, and the terminal in the terminal group contends for the access resource.
- the group leader terminal may raise the transmission power of the first preamble sequence when transmitting the first preamble sequence again.
- the leader terminal may repeatedly transmit the transmit power to repeatedly transmit the first preamble sequence until the group identifier of the captured packet matches the group identifier of the terminal packet or reaches the maximum allowed number of transmissions.
- the transmission interval of the first preamble sequence sent by the group terminal twice must be greater than or equal to the transmission time interval between the preamble sequence and the preamble sequence specified by the protocol in the existing PRACH procedure: Pp — Pp ⁇ t p — p , mi
- [125] 605. Receive, by the AICH, a second acquisition indication, where the acquisition indication is sent by the base station after determining the captured terminal according to the second preamble sequence, where the second acquisition indication includes a signature sequence of the captured terminal.
- the process of the terminal competing for accessing resources is changed from one competition to two competitions, so that the number of preamble sequences received by the base station can be greatly reduced, thereby effectively reducing the load of the base station.
- the reduction in the number of transmissions of the preamble sequence can also reduce the energy consumed by the data transmission process.
- FIG. 7 is a schematic diagram of another embodiment of an access control apparatus according to the present invention.
- the device includes: a processor 701, a memory 702, a communication interface 703, and the processor 701, the memory 702 and the communication interface 703 are connected by a bus 704.
- the bus 704 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus.
- PCI Peripheral Component Interconnect
- EISA Extended Industry Standard Architecture
- the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 7, but it does not mean that there is only one bus or one type of bus.
- the memory 702 is used to store programs.
- the program can include program code, the program code including computer operating instructions.
- the memory 702 may include a random access memory (RAM) memory, and may also include a non-volatile memory (Non-Volatile Memory). For example at least one disk storage.
- the processor 701 executes a program stored in the memory 702, configured to: receive, by using a communication interface 703, a first preamble sequence sent by a group leader terminal in a terminal group; and determine a captured terminal according to the first preamble sequence. Transmitting, by the communication interface 703, a first acquisition indication to a terminal in the captured terminal group; receiving, by the communication interface 703, a second preamble sequence sent by the terminal in the terminal group after receiving the first acquisition indication Determining the captured terminal according to the second preamble sequence; transmitting a second acquisition indication to the captured terminal by using the communication interface 703, where the second acquisition indication is used to indicate that the captured terminal is accessed.
- the receiving, by the communication interface 703, the first preamble sequence sent by the group leader terminal in the terminal group includes: receiving, by using the communication interface 703, the group leader terminal by physical random connection The first preamble sequence transmitted by the inbound channel PRACH and containing the group identity of the terminal packet.
- the sending, by the communication interface 703, the first acquisition indication to the terminal within the captured terminal group includes: transmitting, by using the acquisition indicator channel AICH, by the communication interface 703, including the captured The first capture indication of the group identification of the packet.
- the receiving, by the communication interface 703, the second preamble sequence sent by the terminal in the captured terminal group after receiving the first acquisition indication includes: receiving, by using the communication interface 703 The second preamble sequence of the signature sequence of the terminal sent by the PRACH after the terminal in the captured packet receives the first acquisition indication.
- the sending, by the communication interface 703, the second acquisition indication to the captured terminal includes: transmitting, by using the communication interface 703, the AICH including the signature sequence of the captured terminal The second capture indication.
- the device includes: a processor 801, a memory 802, and a communication interface 803.
- the processor 801, the memory 802, and the communication interface 803 are connected by a bus 804.
- the bus 804 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus.
- PCI Peripheral Component Interconnect
- EISA Extended Industry Standard Architecture
- the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 6, but it does not mean that there is only one bus or one type of bus.
- the memory 802 is used to store programs. Specifically, the program may include program code, and the program generation The code includes computer operating instructions.
- the memory 802 may include a Random Access Memory (RAM) memory, and may also include a Non-Volatile Memory, such as at least one disk storage.
- RAM Random Access Memory
- the processor 801 executes a program stored in the memory 802, configured to: receive, by using the communication interface 803, a first capture indication that is sent by the base station and includes a group identifier of the captured packet; if the group identifier of the captured packet Consistent with the group identifier of the terminal group in which the terminal is located, the second preamble sequence including the signature sequence of the terminal is transmitted to the base station by using the communication interface 803; and the base station is determined by the communication interface 803 to be determined according to the second preamble sequence a second acquisition indication that includes a signature sequence of the captured terminal after the terminal is captured; and if the signature sequence of the captured terminal matches the signature sequence of the terminal, the communication interface 803 is used to send data to the base station.
- the receiving, by the communication interface 803, the first identifier indication of the group identifier that includes the captured packet sent by the base station includes: receiving, by using the communication interface 803, by using an indicator channel AICH. Determining, by the first base station, that the first acquisition indication is sent by the base station according to the first preamble sequence, where the first preamble sequence is physically randomized by the group leader terminal in the terminal group Channel PRACH transmission.
- the method before the receiving, by the communication interface 803, the first acquisition indication that is sent by the base station and includes the group identifier of the captured packet, the method further includes: generating a group identifier that includes the terminal grouping
- the first preamble sequence is transmitted by the PRACH by using the communication interface 803;
- the receiving, by the communication interface 803, the group identity first capture indication that is sent by the base station and including the captured packet includes: using a communication interface
- the 803 receives the first acquisition indication by using an AICH, where the first acquisition indication is sent by the base station after determining the captured packet according to the first preamble sequence.
- the receiving, by using the communication interface 803, the second preamble sequence sent by the terminal in the captured terminal group after receiving the first acquisition indication includes: receiving by using the communication interface 803. After receiving the first acquisition indication, the terminal in the captured packet transmits a second preamble sequence including a signature sequence of the terminal through the PRACH by using the communication interface 803.
- the transmitting, by using the communication interface 803, the sending of the second acquisition indication to the captured terminal comprises: transmitting, by using the communication interface 803, the identifier including the signature sequence of the captured terminal by using an AICH The second capture indication.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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PCT/CN2014/081304 WO2016000188A1 (zh) | 2014-06-30 | 2014-06-30 | 接入控制装置、接入装置及方法 |
CN201480029783.4A CN105900488A (zh) | 2014-06-30 | 2014-06-30 | 接入控制装置、接入装置及方法 |
KR1020177001400A KR101810820B1 (ko) | 2014-06-30 | 2014-06-30 | 액세스 제어 디바이스, 액세스 디바이스 및 방법 |
EP14896841.5A EP3151609A4 (en) | 2014-06-30 | 2014-06-30 | Access control device, access device and method |
US15/392,879 US10462728B2 (en) | 2014-06-30 | 2016-12-28 | Access control apparatus and method, and access apparatus and method |
Applications Claiming Priority (1)
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PCT/CN2014/081304 WO2016000188A1 (zh) | 2014-06-30 | 2014-06-30 | 接入控制装置、接入装置及方法 |
Related Child Applications (1)
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US15/392,879 Continuation US10462728B2 (en) | 2014-06-30 | 2016-12-28 | Access control apparatus and method, and access apparatus and method |
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WO2016000188A1 true WO2016000188A1 (zh) | 2016-01-07 |
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US (1) | US10462728B2 (zh) |
EP (1) | EP3151609A4 (zh) |
KR (1) | KR101810820B1 (zh) |
CN (1) | CN105900488A (zh) |
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CN114222204A (zh) * | 2021-12-09 | 2022-03-22 | 国网宁夏电力有限公司营销服务中心(国网宁夏电力有限公司计量中心) | 一种基于智能配置的电能信息采集能力提升方法 |
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Also Published As
Publication number | Publication date |
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KR101810820B1 (ko) | 2017-12-19 |
EP3151609A1 (en) | 2017-04-05 |
KR20170020467A (ko) | 2017-02-22 |
EP3151609A4 (en) | 2017-06-07 |
US20170111848A1 (en) | 2017-04-20 |
CN105900488A (zh) | 2016-08-24 |
US10462728B2 (en) | 2019-10-29 |
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