WO2015161463A1 - 一种数据传输方法及装置 - Google Patents
一种数据传输方法及装置 Download PDFInfo
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- WO2015161463A1 WO2015161463A1 PCT/CN2014/076028 CN2014076028W WO2015161463A1 WO 2015161463 A1 WO2015161463 A1 WO 2015161463A1 CN 2014076028 W CN2014076028 W CN 2014076028W WO 2015161463 A1 WO2015161463 A1 WO 2015161463A1
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- WIPO (PCT)
- Prior art keywords
- base station
- message
- data packet
- repeated transmissions
- prefix
- Prior art date
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 290
- 238000000034 method Methods 0.000 title claims abstract description 86
- 238000009825 accumulation Methods 0.000 claims abstract description 11
- 238000004891 communication Methods 0.000 claims description 19
- 238000004364 calculation method Methods 0.000 claims description 16
- 238000004458 analytical method Methods 0.000 claims description 7
- 102000002067 Protein Subunits Human genes 0.000 claims description 3
- 108010001267 Protein Subunits Proteins 0.000 claims description 3
- 230000009194 climbing Effects 0.000 claims 3
- 238000012545 processing Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 17
- 230000003993 interaction Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000004590 computer program Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/54—Signalisation aspects of the TPC commands, e.g. frame structure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
-
- 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
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a data transmission method and apparatus.
- M2M Mobile to Mobile, machine-to-machine, refers to machine-to-machine wireless communication
- GSM Global system for mobile communication, global mobile Communication system
- the UMTS Universal Mobile Telecommunication System
- the UMTS terminal supporting the M2M service needs to be
- the existing UMTS technology adds coverage of nearly 12dB gain. At present, in addition to increasing the transmission power, no other effective solution has been found.
- the data transmission method and device of the embodiment of the invention are used to achieve super-far coverage under the premise of saving transmission power.
- the first aspect of the present invention provides a data transmission method, where the method includes: the terminal repeatedly sends a data packet to the base station by using an uplink random access channel, so that the base station correctly receives the data by means of energy accumulation.
- the data packet wherein the prefix portion of the data packet is repeatedly sent N times, and the message portion of the data packet is repeatedly sent M times, 1 ⁇ N, 1 ⁇ M.
- the terminal repeatedly sends data to the base station by using the uplink random access channel.
- Package including:
- the terminal determines an access slot point corresponding to the number of repeated transmissions N of the prefix part; the terminal repeatedly sends the data packet to the base station at the determined access slot point, so that the base station correctly receives the data packet.
- the terminal repeatedly transmits the data packet to the base station at a randomly selected access slot point to enable the base station to correctly receive the data packet.
- the signature codes of the prefix part are grouped, and each group corresponds to a different number of repeated transmission times of the message part,
- the terminal repeatedly sends the data packet to the base station by using the uplink random access channel, and further includes:
- the terminal determines a signature code group corresponding to the number of repeated transmissions M of the message part, and determines a signature code used by the prefix part according to the ⁇ feature code group.
- the data packet is repeatedly sent to the base station through the uplink random access channel, including:
- the ⁇ 5 terminal determines, according to the feature code group, an access slot point that sends the data packet and a feature code used by the prefix part;
- the terminal repeatedly transmits the data packet to the base station at the determined access slot point, so that the base station correctly receives the data packet.
- the data packet is repeatedly sent to the base station through the uplink random access channel, including:
- the terminal determines the number of repeated transmissions of the message part ⁇ the corresponding feature code group, and determines the feature code used by the prefix part according to the feature code group.
- the method further includes:
- the terminal calculates the actual transmit power of the prefix part and the message part according to the initial transmit power, the transmit power, the length of the transmission, and the number of repeated transmissions.
- an embodiment of the present invention provides a data transmission method, where the method includes: receiving, by a base station, a data packet repeatedly sent by a terminal by using an uplink random access channel, where the number is According to the prefix part of the packet is repeatedly sent N times, the message part of the data packet is repeatedly sent M times, 1 ⁇ N, 1 ⁇ M;
- the base station merges all received data packets and parses the information obtained in the message part.
- Part of the information including:
- the base station merges the received M-message message portion, and parses and obtains the information therefrom.
- the base station merges all the received data packets, and parses the information of the obtained message part, including:
- the base station merges the received one-time message part, and parses the obtained information from it.
- the signature codes of the prefix part are grouped, and each group corresponds to a different number of repeated transmission times of the message part
- the base station combines all the received data packets and parses the information of the obtained message part, and further includes:
- the base station searches for the feature code group to which the feature code belongs, and determines the number of repeated transmissions of the message part according to the feature code group;
- the signature codes of the prefix part are grouped, and each group respectively corresponds to a different number of repeated transmission times of the message part, and then the base station merges all the received data packets, and parses Get information about the message section, including:
- the base station After parsing the feature code from the prefix part, the base station searches for the feature code group to which the feature code belongs. And determining, according to the feature code group, the number of repeated transmissions M of the message part;
- the base station merges the received M-message message portion, and parses and obtains the information therefrom.
- the signature codes of the prefix part are grouped, and each group corresponds to a different access slot point and a message part repeated transmission times, and then the base station merges 5 received All packets, and parsing the information obtained in the message part, including:
- the base station determines, according to the access slot point of the received data packet, the signature group to which the signature of the prefix part belongs, and determines the number of repeated transmissions M of the message part according to the feature code group;
- the base station merges the received M-message message portion, and parses and obtains the information therefrom.
- the base station After parsing the feature code from the received prefix part, the base station searches for the feature code group to which the feature code belongs, and determines the number of repeated transmissions of the message part according to the feature code group;
- the base station merges the received one-time message part, from which the information is parsed and obtained.
- an embodiment of the present invention provides a data transmission apparatus, where the apparatus includes: a sending unit, configured to repeatedly send a data packet to a base station by using an uplink random access channel, so that the base station adopts an energy accumulation manner. Receiving the data packet correctly, wherein the prefix portion of the data packet is repeatedly sent, and the message portion of the data packet is repeatedly sent, 1 ⁇ ⁇ , 1 ⁇ ⁇ .
- the sending unit includes:
- a first slot point determining unit configured to determine an access slot point corresponding to the number of repeated transmissions of the prefix part ;
- a first sending subunit configured to repeatedly send the data packet to the base station at the determined access slot point, so that the base station correctly receives the data packet.
- the sending unit is specifically configured to repeatedly send the data packet to the base station at a randomly selected access slot point, so that the base station correctly receives the data packet.
- the signature codes of the prefix part are grouped, and each group is corresponding to a different message part.
- the number of transmissions, the sending unit further includes:
- the first feature code group determining unit is configured to determine a feature code group corresponding to the number of repeated transmissions M of the message part, and determine a feature code used by the prefix part according to the feature code group.
- the sending unit includes:
- a second feature code group determining unit configured to determine a feature code group corresponding to the number of repeated transmissions M of the message part
- a second slot point determining unit configured to determine, according to the feature code group, a slot into which the data packet is sent and a feature code used by the prefix portion;
- a second sending subunit configured to repeatedly send the data packet to the base station at the determined access slot point, so that the base station correctly receives the data packet.
- the yuan includes:
- a third feature code group determining unit configured to determine a feature code group corresponding to the number of repeated transmissions of the message part, and determine a feature code used by the prefix part according to the feature code group;
- a third sending subunit configured to repeatedly send the data packet to a base station, where a message part of the data packet is repeatedly sent ⁇ relative to a feature code group to which a signature of the prefix part of the data packet belongs
- the apparatus further includes:
- a calculating unit configured to calculate an actual transmit power of the prefix part and the message part respectively according to the initial transmit power, the transmit power increase length, and the repeated transmission times.
- the embodiment of the present invention provides a data transmission apparatus, where the apparatus includes: a receiving unit, configured to receive a data packet repeatedly sent by a terminal by using an uplink random access channel, where the data packet is prefixed Partially repeating the transmission, the message part of the data packet is repeatedly sent once, 1 ⁇ ⁇ , 1 ⁇ ;
- the merge parsing unit includes:
- the merge parsing unit includes:
- the merge parsing unit further includes:
- a third determining unit configured to: after determining the number of repeated transmissions of the prefix part, search for a feature code group to which the feature code belongs, and determine a repeated transmission time of the message part according to the feature code group
- the feature code of the prefix part is grouped, and each group corresponds to a different access slot point and a message part repeated transmission times, where the merge parsing unit includes:
- a fifth determining unit configured to determine the prefix part according to an access slot point of the received data packet
- the unit includes:
- a sixth determining unit configured to: after parsing the feature code from the received prefix part, searching for a feature code group to which the feature code belongs, and determining a repeated transmission number of the message part according to the feature code group;
- the communication bus is configured to implement connection communication between the at least one processor, the at least one network interface, and the memory;
- the at least one processor is configured to execute program instructions stored in the memory, where the program instructions include a sending unit;
- the sending unit is configured to repeatedly send a data packet to the base station by using an uplink random access channel, so that the base station correctly receives the data packet by means of energy accumulation, where the data packet is
- the program instruction further includes a calculating unit The calculating unit is configured to calculate an actual transmit power of the prefix part and the message part according to the initial transmit power, the transmit power, the length of the transmission, and the number of repeated transmissions.
- an embodiment of the present invention provides a data transmission apparatus, where the apparatus includes: One less processor, at least one network interface, memory, and at least one communication bus,
- the communication bus is configured to implement connection communication between the at least one processor, the at least one network interface, and the memory;
- the at least one processor configured to execute program instructions stored in the memory,
- sequence instructions include a receiving unit and a merge parsing unit
- the receiving unit is configured to receive a data packet that is repeatedly sent by the terminal by using an uplink random access channel, where the prefix part of the data packet is repeatedly sent N times, and the message part of the data packet is repeatedly sent M times, 1 ⁇ N , 1 ⁇ M;
- the merge parsing unit is configured to merge all the received data packets, and parse the information obtained by the message unit.
- the terminal repeatedly sends a data packet to the base station, and the base station performs a combining process on all the repeatedly transmitted data packets of the terminal, and then demodulates the information to be sent by the terminal from the combined data packet.
- the base station can achieve ultra-long coverage without increasing the transmission power.
- FIG. 1 is a schematic diagram of a base station side data transmission method according to an embodiment of the present invention.
- FIG. 2 is a flow chart of a method for correctly receiving a data packet by a base station according to an embodiment of the present invention
- FIG. 3 is a flowchart of a second method for a base station to correctly receive a data packet according to an embodiment of the present invention
- Flowchart of mode 3 of receiving a data packet
- FIG. 5 is a flowchart of a method 4 of correctly receiving a data packet by a base station according to an embodiment of the present invention
- FIG. 6 is a flowchart of a method for correctly receiving a data packet by a base station according to an embodiment of the present invention
- FIG. 7 is a flowchart of a method for correctly receiving a data packet by a base station according to an embodiment of the present invention
- FIG. 8 is a data of a base station side according to an embodiment of the present invention. Schematic diagram of the transmission device;
- FIG. 9 is a schematic diagram showing the hardware configuration of a base station side data transmission apparatus according to an embodiment of the present invention. detailed description
- the data transmission scheme provided by the embodiment of the present invention aims to realize the ultra-long coverage of the UMTS (Universal Mobile Telecommunication System), so-called ultra-long coverage. If we understand from the coverage, we can The case where the coverage is more than ten kilometers is defined as a super-far coverage; or if it is understood from the application scenario, the situation applied to an open scene such as a sea surface or a desert may be defined as a super-long coverage.
- UMTS Universal Mobile Telecommunication System
- the present invention provides a new data transmission scheme that achieves ultra-long coverage without increasing the transmission power or even reducing the transmission power.
- the data transmission process in the embodiment of the present invention involves both the base station and the terminal, and the two need to cooperate with each other to achieve ultra-long coverage.
- the terminal performs repeated transmission of the data packet
- the base station repeatedly receives and parses the data packets repeatedly transmitted by the terminal one by one, and combines the information parsed from each data packet to achieve the purpose of correctly receiving the terminal data packet. That is to say, in a super-long coverage scenario, if the transmission power in a non-super-far coverage scenario is maintained, the base station does not receive the data packet sent by the terminal, but the base station may not be correct due to channel quality or external interference. Parsing out the information in the packet, also
- the terminal repeatedly sends a data packet to the base station, and the base station parses each received data packet. And merge the information parsed from each packet to achieve correct reception of the packet.
- the terminal repeatedly sends the data packet to the base station by using the uplink random access channel, so that the base station correctly receives the data packet by means of energy accumulation, where the prefix part of the data packet is repeatedly sent, the data packet
- the message part is sent repeatedly, 1 ⁇ ⁇ , 1 ⁇ .
- the terminal repeats multiple times in PRACH (Physical random
- PRACH Physical random access channel
- E-RACH Evolution random access channel
- the prefix part preamble is repeatedly sent N times, and the message part message is repeatedly sent M times, and N and M are positive integers.
- the number of repeated transmissions between the preamble part and the message part can be reflected in the following two relationships:
- N M >1; this relationship indicates that both the preamble part and the message part are transmitted repeatedly, and the two are repeatedly transmitted the same number of times.
- the terminal repeatedly sends a data packet to the base station.
- the base station should know the number of times the terminal repeatedly transmits, and then the base station can receive the preamble according to the time, and receive the message according to the M times. Then, the combined analysis obtains the information sent by the terminal.
- the following is a description of the case in which the terminal notifies the base station of the number of repetitions in combination with the relationship between the preamble and the message.
- the corresponding implementation scheme is: the terminal is performing data packet transmission.
- the corresponding access slot point is determined according to the preamble repetition number, and then the data packet is repeatedly sent to the base station at the determined access slot point.
- the corresponding relationship between the numbers of 5 and 5 is configured to be transmitted to the corresponding terminal by the base station in the form of a broadcast.
- the access slot points numbered 1, 2, 3, and 4 can be repeated one, three, two, and seven times respectively for the preamble, that is, one-to-one correspondence between the access slot point and the preamble repetition number.
- the access slot points in the above example may also be repeated once, three times, two times, three times for the preamble, that is, there is only a mapping relationship between the access slot point and the preamble repetition number. But not one-to-one correspondence.
- the correspondence between the access slot point and the preamble repetition number, the corresponding manner, and the like may be not limited. As long as the terminal knows the number of preamble repeated transmissions, it can specify which access slot to pick up. When the base station knows the access slot point at which the terminal transmits data, it can clarify the number of times the corresponding preamble is repeatedly transmitted.
- the access slot point 2 is used as the access slot point of the repeated transmission packet.
- the preamble information is transmitted three times in the slot.
- the base station receives the data packet at the access slot point 2, the base station can know that the terminal is currently transmitting the preamble 3 times according to its known correspondence.
- the access slot point is used to notify the base station preamble ⁇ 5 to repeat the number of transmissions
- the terminal may also randomly select the access slot point (ie, the access slot point and There is no correspondence between the number of repetitions of the preamble N, and the terminal can perform random access operations at any access slot point) to perform repeated transmission of data packets.
- the base station is always in the state of receiving the preamble, and continuously tries to decode the preamble information. That is to say, each time the base station receives the preamble, it can try to perform a combination of >0 and parse it to determine whether the signature signature used by the preamble can be correctly parsed.
- the channel quality may change at any time, which may affect
- the present invention further provides Embodiment 3, after the base station determines the number of repetitions N of the preamble, determines the number of message repetitions M by other schemes, and Verify the implementation ⁇ Example 1, 2 to determine the accuracy of the number of repetitions.
- the specific embodiment is as follows: the number of times the terminal repeatedly sends the message part corresponds to the signature group to which the signature of the prefix part belongs.
- the corresponding implementation scheme is: before the sending of the data packet, the terminal first searches for the signature code group corresponding to the number of repeated transmissions M of the message, and determines the signature used by the preamble part from the found signature code group, and then performs the data packet. Repeatedly sent.
- the existing 16 signature codes can be grouped to correspond to different signature groups.
- 10 groups can be repeated 2 times, 3 times, 5 times, 7 times for the message respectively, and the ⁇ P signature group corresponds to the number of message repetitions.
- the signature group in the above example corresponds to the message repeated 2 times, 3 times, 2 times, and 5 times respectively; or, signature group 1 ⁇ 3 corresponds to the number of message repetitions 2 times, and signature group 4-5 corresponds to the number of message repetitions 3 times Etc.
- the embodiment of the present invention corresponds to the number of message repetitions.
- the correspondence between the signature group and the number of message repetitions, the corresponding method, and the like are not limited. As long as the terminal determines the number of times the message is repeatedly transmitted, the signature of the preamble part can be clarified, and the base station parses out from the preamble sent by the terminal. After signature, the corresponding number of messages can be sent repeatedly.
- the preamble is determined by the base station by accessing the slot point or by continuously trying to parse.
- the number of times the message is repeatedly sent M can be determined according to the signature group to which the signature belongs. This method is not affected by the channel quality change, and the accuracy is high. Therefore, the accuracy of the repeated transmission times determined by the embodiments 1 and 2 can be verified according to actual needs.
- the correspondence between the signature group and the number of repeated transmissions is established in advance, and the correspondence is notified to the base station and the terminal in advance, so that the data packet sent by the terminal is satisfied.
- the signature group to which the signature used by the preamble part corresponds to the number of repeated transmissions.
- the base station can also parse the signature after the parsing of the signature (which can be analyzed by the access slot point, the continual attempt to parse, etc.), and the embodiment of the present invention may not be specifically limited.
- the correspondence with the number of repetitions determines the number of times the preamble and the message are repeatedly transmitted. That is, based on the scheme provided by Embodiment 3, the base station has two schemes for determining the number of repeated transmissions, which will be explained below.
- the corresponding relationship in this embodiment can be configured in the base station, and then sent by the base station to the terminal through the broadcast mode, that is, the base station and the terminal can know the two correspondences in advance.
- the corresponding implementation scheme is: before the terminal repeatedly transmits the data packet, the terminal first determines the signature code group corresponding to the number of repeated transmissions of the message M, and then determines the following two aspects according to the signature group:
- the preamble part does not perform repeated transmission, but the message part performs repeated transmission 5, so there is no need to notify the base station preamble part of the repeated transmission times N, but in order to correctly receive and demodulate the information of the message part, it is still necessary to pass some
- the way to notify the base station of the message part of the number of repeated transmissions M is as follows:
- the existing 16 signatures are grouped so that the different signature groups correspond to different message repetition times M, that is, the correspondence between the signature group and the number of message repeated transmissions is established, ⁇ is configured and configured to the base station, and the base station broadcasts The form is sent to the corresponding terminal, that is, both the terminal and the base station know this correspondence in advance.
- the correspondence number of the message portion can be determined by the correspondence.
- the relationship between the signature group and the message repetition number is not limited, and the specific process can be referred to the above description, and details are not described herein again.
- the initial transmit power of the preamble and the message according to the existing protocol may be transmitted (the power pair 10 should only transmit the preamble once, once. The case of the message) Send the packet.
- the following scheme for reducing the transmission power of the data packet is also provided.
- the terminal before performing the repeated transmission of the data packet, the terminal first calculates the actual transmit power of the prefix part and the message part according to the initial transmit power, the transmission >5 power, the length of the transmission, and the number of repeated transmissions, and then performs according to the calculated actual transmit power. Repeat transmission of preamble and message.
- the method of calculating the actual transmit power of the preamble and the message can be embodied in two specific situations.
- the random access process it can be divided into two specific implementation scenarios: R99 Random access procedure (using channel is PRACH) And the enhanced random access procedure (using the channel is E-RACH), therefore, the power calculation process is explained below in conjunction with specific situations and scenarios.
- S is the preamble transmit power ramp up
- n is the preamble climb number
- the transmit power of the message part is obtained according to the preamble part transmit power. Therefore, after calculating the actual transmit power of the preamble, the actual transmit power of the message part can be calculated according to the existing method, and the present invention does not do this too much. Introduction.
- the transmit power of the message part is specifically divided into two types: control information transmission power and data information transmission power.
- the preamble part since the preamble part does not perform repeated transmission, the preamble can be transmitted according to the initial transmission power specified in the existing protocol 10, but the message part needs to be repeated M times, and the transmission power of the message part in the existing protocol is based on The power of the preamble part is set. Therefore, in order to avoid wasting the transmission power of the message part and ensuring that the message part can be correctly received by the base station, the transmission power of the message part can be appropriately reduced. Specifically, reducing the transmit power of the message portion can be divided into two parts: reducing the control information transmission power and lowering the data information transmission power.
- the RNC Radio Network Controller
- the RNC delivers the parameter P p — m in the system broadcast message, and the terminal transmits the number of repeated transmissions M according to the known P preamble , the P p — m , and the message part of the upper layer.
- the transmission power of the message part control information and the data information can be calculated.
- the transmission power value of the information considering that the message part is to be M-repetitively transmitted in the scheme of the present invention, the actual transmission power of the message part control information is P message — ⁇ ntrol /M.
- the transmission power of the data information from the message part is set according to the message part control information (there is a power offset to indicate the power ratio of the two), so after knowing the power offset of the message part control information and the data information
- the actual transmit power of the data information in the message part can be known.
- the RNC sends the parameter P p — m and the number of repeated transmissions of the message part in the system broadcast message, and the terminal can calculate the message part control information according to the known P preamble and the P p — m parameter sent by the upper layer.
- the transmission power of the data information is not limited to the known P preamble and the P p — m parameter sent by the upper layer.
- P message can be calculated according to the above formula — ⁇ ntrol.
- P message — ⁇ ntrol is characterized by M repeated transmissions.
- Message part ⁇ 5 The actual transmit power of the control information.
- the transmission power of the message part of the message part is set according to the message part control information (there is a power offset to indicate the power ratio of the two), it is known that the power offset of the message part control information and the data information is known.
- the actual transmit power of the data information in the message part is known.
- the RNC sends the parameter P p — e in the system broadcast message, and the terminal can calculate the message part control information and data information according to the known P preamble , the P pe of the upper layer, and the repeated transmission times M of the message part. Transmit power.
- P dp (h characterizes the transmission power value of the control information in the message part when only one transmission is performed, considering that in the scheme of the present invention, the message part is subjected to M repeated transmissions, so the message part
- the actual transmit power of the control information is P dp ⁇ h / M.
- the transmit power of the message part of the message part is set according to the message part control information (there is a power offset to indicate the power ratio of the two), it is known Message part control information and data information After the rate is offset, the actual transmit power of the data information in the message part can be known.
- the RNC sends the number of repeated transmissions M of the parameter P p — e and the message part in the system broadcast message.
- the terminal can calculate the message part control 5 information according to the known P preamble and the P p — e parameter sent by the upper layer. The transmission power of the data information.
- P dp( h ) can be calculated according to the above formula.
- P dp ( h represents the message when M repeated transmissions are performed) Part of the actual transmit power of the control information.
- the transmit power of the message data of the message part is set according to the control information of the ⁇ message part (there is a power offset to indicate the power ratio of the two), the message part control information is known. After the power offset of the data information, the actual transmit power of the data information in the message part can be known.
- Step 101 A base station receives a data packet repeatedly sent by a terminal by using an uplink random access channel, where a prefix part of the data packet Repeatedly sending N times, the message part of the data packet is repeatedly sent M times.
- Step 102 The base station merges all the received data packets and parses the information of the obtained message part.
- the terminal repeatedly transmits the M2M data packet to the base station.
- the base station can perform the combined analysis and parsing of the data packet after receiving all the repeatedly transmitted data packets of the terminal. Bring up the information contained in the message section.
- the following embodiments of the present invention provide the following manners for the following five types of base stations to correctly receive data packets, which are explained below.
- Step 201 The base station determines, according to the access slot point of the received data packet, the number N of repeated transmissions of the prefix part.
- Step 203 The base station merges the received M-time message part, and parses and obtains the information.
- both the terminal and the base station know in advance the correspondence between the number of preamble repeated transmissions and the access slot point. Therefore, after receiving the preamble sent by the terminal, the base station can determine that it corresponds to Which access slot point is accessed, and according to the correspondence between the access slot point and the number of preamble repeated transmissions, the number of repeated transmissions N of the preamble part is determined. Moreover, since the number of message repetitions M is the same as the number of repetitions N of the preamble, the base station can correctly receive the ⁇ preamble part and the message part accordingly, and parse out the information transmitted by the terminal from the message.
- the interaction process between the terminal and the base station can be embodied as:
- the existing 15 access slot points are grouped, and the correspondence between the access slot point and the number of preamble repetitions is established, and the corresponding relationship is configured in the base station, and the base station sends the broadcast in the form of a broadcast.
- the base station sends the broadcast in the form of a broadcast.
- the terminal determines the access slot point corresponding to the number of times the preamble repeats the transmission N in combination with the predicted correspondence, and repeatedly transmits the data packet to the base station at the access slot point.
- the preamble part and the message part of the data packet are repeatedly transmitted the same number of times.
- the second embodiment of the present invention provides a method for the base station to correctly receive the data packet. For details, refer to the flowchart shown in FIG. 3.
- Step 301 The base station merges all the prefix parts currently received, and determines the number of times of receiving correspondingly when the feature code is correctly parsed as the number of repeated transmissions N of the prefix part.
- Step 303 The base station merges the received M message parts, and parses and obtains the information. Each time the base station receives a preamble sent by the terminal, it tries to merge through parsing. Demodulation of preamble information:
- the terminal has not completed the repeated transmission of the preamble.
- the base station should continue to wait for the preamble repeatedly transmitted by the receiving terminal and continuously try to demodulate until the preamble information is correctly demodulated.
- the interaction process between the terminal and the base station can be embodied as:
- the terminal repeatedly transmits a data packet to the base station at a randomly selected access slot point, wherein the preamble portion and the message portion of the data packet are repeatedly transmitted the same number of times.
- the base station is in the state of receiving the preamble.
- the number of receptions is counted up once, and a merge analysis is attempted until the preamble information is correctly decoded.
- the value of the accumulated count can be repeatedly sent as pre5 times N times.
- the terminal notifies the base station to repeatedly send the number of times, that is, the signature of the signature > 0, and each group corresponds to a different number of times of message repetition.
- the present invention provides a method for the base station to correctly receive the data packet. For details, please refer to the flowchart shown in FIG.
- Step 402 Parse the signature used to obtain the prefix part.
- Step 403 Find a feature code group to which the feature code belongs, and determine a number of repeated transmissions M of the message part according to the feature code group.
- Step 404 If the M values determined by the two methods are the same, the base station merges the received M times message parts, and parses and obtains the information.
- Step 401 ′ the base station merges all the prefix parts currently received, and determines the number of times of receiving correspondingly when the signature is correctly parsed as the number of repeated transmissions of the prefix part, and determines the part of the message according to ⁇ ⁇ Repeat the number of times to send.
- Step 402 Parse the signature used to obtain the prefix part.
- Step 403 Find a feature code group to which the feature code belongs, and determine a number of repeated transmissions of the message part according to the feature code group.
- Step 404 If the threshold values determined by the two methods are the same, the base station merges the received one-time message part, and parses and obtains the information.
- the number of repeated transmissions of the message may be determined according to the signature group to which the signature belongs, and then the two methods are determined to be determined. Whether the number of repeated transmissions is the same, to ensure that the base station determines the accuracy of the number of repetitions.
- the correspondence between the signature and the signature group, and the correspondence between the signature group and the number of repeated transmissions of the message can be referred to the above description, and details are not described herein.
- signature has the following two functions in this embodiment:
- the base station demodulates the signature from the preamble, it determines whether the signature is used by other terminals, and if it is not used by other terminals, it can notify the terminal to perform the transmission process of the M message portion.
- the demodulated signature 10 belongs to the signature group, and according to the correspondence between the signature group and the message repetition number, the number M of repeated transmissions of the message portion is determined, and the value is verified by using the value.
- the method of determining the M by using the signature group and the repetition number is not affected by the channel quality, and the accuracy is high, and the M value determined by the mode can be >5.
- the merge analysis of the subsequent message parts is performed.
- the processing may be performed in other manners, such as discarding the M value determined by the two methods, notifying the terminal to perform data packet retransmission, and the like. limited.
- the base station is notified to the base station to repeatedly transmit the number of times of the embodiment 3, that is, the prefix part
- the feature code is grouped, and each group corresponds to a scheme in which the number of times of the message is repeated.
- the present invention provides a method for the base station to correctly receive the data packet. For details, refer to the flowchart shown in FIG.
- Step 501 The base station parses the feature code from the prefix part.
- Step 502 Find a feature code group to which the feature code belongs, and determine a repeated transmission frequency M of the message part according to the feature code group.
- Step 503 The base station merges the received M-time message part, and parses and obtains the information.
- the base station can obtain the signature used by the preamble part, determine the signature group to which the signature belongs, and determine the message repetition according to the correspondence between the pre-configured signature group and the number of repeated transmissions.
- the number of transmissions M, positive ⁇ does resolve the information transmitted by the terminal.
- the base station can demodulate the preamble information by: pre-configuring the correspondence between the access slot point and the number of repeated transmissions, and correctly receiving the preamble portion to demodulate the preamble information; The base station is in the receiving preamble state, and each time the preamble is received, a merge parse is attempted until the preamble information is correctly demodulated.
- the interaction process between the terminal and the base station can be embodied as:
- the existing 16 signatures are grouped, and the correspondence between the signature group and the message repetition number is established, and the corresponding relationship is configured in the base station, and the base station sends the corresponding relationship to the corresponding terminal through broadcast. That is, it is ensured that the terminal and the base station share the correspondence established by the pre->0 before the information is exchanged.
- the terminal determines the signature group corresponding to the number of times of the message repeated transmission M, and selects a signature used by the preamble part from the signature group, that is, the signature group to which the signature used by the preamble part of the packet belongs to The number of repeated transmissions of the message part of the packet corresponds to M.
- the terminal can repeatedly send the data packet to the base station at the access slot point with a random selection of >5, wherein the preamble part and the message part of the data packet are repeatedly transmitted the same number of times.
- the base station is in the state of receiving the preamble, and every time the preamble is received, the merge analysis is attempted until the preamble information is correctly demodulated.
- the signature used by the prefix part can be obtained from the parsed preamble information.
- the base station determines the number of message repeated transmissions M corresponding to the signature group to which the signature belongs in combination with the predicted correspondence relationship, and receives the merged message part accordingly, and parses the information transmitted by the terminal.
- the scheme for the above-mentioned terminal notifying the base station to repeatedly transmit the number of times of the embodiment 4, that is, N M>1, and grouping the signatures, each group corresponding to a different access slot point and a message repeated transmission number, the present invention
- the embodiment provides a method 5 for the base station to correctly receive the data packet. For details, refer to the flowchart shown in FIG. 6.
- Step 601 The base station determines, according to an access slot point of the received data packet, a signature code group to which the feature part of the prefix part belongs, and determines a repeated transmission sequence ⁇ of the message part according to the feature code group.
- Step 602 The base station merges the received one-time message part, and parses and obtains the information. That is to say, the correspondence between the signature group and the number of repeated transmissions of the message and the correspondence between the signature group and the access slot point are established in advance, so that after receiving the data packet, the base station can obtain the corresponding correspondence according to the known correspondence. First, the signature group corresponding to the slot point of the received data packet is determined, and then the corresponding number of message repeated transmissions M is determined according to the signature group, and the information transmitted by the terminal is correctly parsed.
- the interaction process between the terminal and the base station can be embodied as:
- the terminal determines the signature group corresponding to the number of times of the message repeated transmission M and the access slot point corresponding to the signature group, and also selects a signature used by the preamble from the determined signature group. After this, the terminal can repeatedly send data packets to the base station at the selected access slot point, wherein the preamble part of the data packet and the message Partially repeated the same number of times.
- the base station determines the signature group corresponding to the slot point of the received data packet in combination with the predicted correspondence relationship, and further determines the number of message repeated transmissions M corresponding to the signature group, and receives the merged message part accordingly, and parses the terminal transmission from the terminal. information.
- the method of receiving the data packet is six. For details, refer to the flowchart shown in FIG. 7.
- Step 701 After parsing the feature code from the received prefix part, the base station searches for the feature code group to which the feature code belongs.
- Step 702 Determine, according to the feature code group, the number of repeated transmissions of the message part.
- the preamble part does not perform repeated transmission. Therefore, after receiving the ⁇ 5 preamble sent by the terminal, the base station can correctly demodulate the preamble information and obtain the signature used by the preamble. Since the terminal and the base station know the correspondence between the signature group and the number of message repetitions before the data packet is sent, after obtaining the signature used by the preamble, the number of times of the message repeated transmission M can be determined according to the predicted correspondence, so that the base station This correctly receives the message part and parses out the information transmitted by the terminal. For details about the interaction process, see the introduction of >0 above, and I will not repeat them here.
- the embodiment of the present invention further provides a data transmission device, that is, the terminal in the above, the device includes:
- a sending unit configured to repeatedly send the data packet to the base station by using the uplink random access channel, so that the base station of the “5” base station correctly receives the data packet by means of energy accumulation, where the prefix part of the data packet is repeatedly sent N times
- the message part of the data packet is repeatedly sent M times, 1 ⁇ N, 1 ⁇ M.
- the sending unit may include:
- a first slot point determining unit configured to determine a number of repeated transmissions N of the prefix portion Access slot point
- a first sending subunit configured to repeatedly send the data packet to the base station at the determined access slot point, so that the base station correctly receives the data packet.
- the sending unit, 5 is specifically configured to repeatedly send the data packet to the base station at a randomly selected access slot point, so that the The base station correctly receives the data packet.
- the signature is also grouped, and each group corresponds to a different number of times of message transmission
- the sending unit may further include:
- the first feature code group determining unit is configured to determine a feature code group corresponding to the number of repeated transmissions of the message part, and determine a feature code used by the prefix part according to the feature code group.
- the number of message repeated transmissions M corresponds to the signature group to which the signature used by the preamble belongs.
- a second feature code group determining unit configured to determine a feature code group corresponding to the number of repeated transmissions M of the message part
- a second slot point determining unit configured to determine, according to the feature code group, an access slot point for transmitting the data packet and a feature code used by the prefix portion;
- a second sending subunit configured to repeatedly send the data packet to the base station at the determined access slot point, so that the base station correctly receives the data packet.
- the sending unit may include:
- a third feature code group determining unit configured to determine a feature code group corresponding to the number of repeated transmissions M of the message part, and determine a feature code used by the prefix part according to the feature code group;
- a third sending subunit configured to repeatedly send the data packet to a base station, where the data packet is sent
- the partial number of repeated transmissions M corresponds to a signature group to which the signature of the prefix portion of the packet belongs.
- the embodiment of the present invention may also reduce the initial transmission power specified by the existing protocol.
- the data transmission device may further include:
- the embodiment of the present invention further provides another data transmission device, that is, the base station in the above.
- the device may include:
- the receiving unit 801 is configured to receive, by the terminal, a data packet that is repeatedly sent by the uplink random access channel, where the prefix part of the data packet is repeatedly sent, and the message part of the data packet is repeatedly sent, 1 ⁇ ⁇ , 1 ⁇ ;
- the merging parser 802 is configured to merge all the received data packets and parse the information of the message part ⁇ 5.
- the merge parsing unit can merge the data packets in six ways and parse the information in the message. The explanations are separately explained below.
- the merge parsing unit may include:
- the merge parsing unit may further include: a third determining unit, configured to: After determining the number of repeated transmissions N of the prefix portion, searching for a feature code group to which the signature code belongs, and determining, according to the feature code group, a repeated transmission number 5 of the message portion;
- the merge parsing unit may include:
- the merge parsing unit may include:
- a fifth determining unit configured to determine, according to an access slot point of the received data packet, a feature code group to which the signature of the prefix part > 0 belongs, and determine a number of repeated transmissions of the message part according to the feature code group M;
- a sixth determining unit configured to: after parsing the feature code from the received prefix part, searching for a feature code group to which the feature code belongs, and determining a repeated transmission number M of the message part according to the feature code group;
- the embodiment of the present invention also provides a hardware configuration of the data transmission device. May include at least one processor (eg, a CPU), at least one network interface or other communication interface, memory,
- the processor is operative to execute an executable module, such as a computer program, stored in the memory.
- the memory may include a high speed random access memory (RAM: Random Access Memory) and may also include a non-volatile memory such as at least one disk memory.
- the communication connection between the system gateway and at least one other network element is implemented by at least one network interface (which may be wired or wireless), and the Internet, the wide area network, the local network, the metropolitan area network, etc. may be used.
- program instructions are stored in the memory, and the program instructions can be executed by the processor.
- FIG. 9 a schematic diagram of a hardware configuration of a data transmission apparatus on a base station side according to an embodiment of the present invention is shown.
- the program instruction includes a receiving unit 801 and a merge parsing unit 802. For the specific implementation of each unit, refer to the corresponding unit disclosed in FIG. .
- the embodiment of the present invention further provides a hardware configuration scheme of the data transmission apparatus on the terminal side.
- the program instructions stored in the memory may include a sending unit; or, further, the computing unit may be included. I will not go into details here.
- the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product, which may be stored in a storage medium such as a ROM/RAM or a disk. , an optical disk, etc., comprising instructions for causing a computer device (which may be a personal computer, a server, or a network communication device such as a media gateway, etc.) to perform the various embodiments of the present invention or portions of the embodiments described herein. method.
- a computer device which may be a personal computer, a server, or a network communication device such as a media gateway, etc.
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Abstract
Description
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Priority Applications (6)
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CN201480001089.1A CN105210317A (zh) | 2014-04-23 | 2014-04-23 | 一种数据传输方法及装置 |
EP14890283.6A EP3128693A4 (en) | 2014-04-23 | 2014-04-23 | Data transmission method and apparatus |
JP2016563971A JP2017518673A (ja) | 2014-04-23 | 2014-04-23 | データ伝送方法および装置 |
CA2946636A CA2946636A1 (en) | 2014-04-23 | 2014-04-23 | Data transmission method and apparatus |
PCT/CN2014/076028 WO2015161463A1 (zh) | 2014-04-23 | 2014-04-23 | 一种数据传输方法及装置 |
US15/331,146 US20170041888A1 (en) | 2014-04-23 | 2016-10-21 | Data transmission method and apparatus |
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PCT/CN2014/076028 WO2015161463A1 (zh) | 2014-04-23 | 2014-04-23 | 一种数据传输方法及装置 |
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US15/331,146 Continuation US20170041888A1 (en) | 2014-04-23 | 2016-10-21 | Data transmission method and apparatus |
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US (1) | US20170041888A1 (zh) |
EP (1) | EP3128693A4 (zh) |
JP (1) | JP2017518673A (zh) |
CN (1) | CN105210317A (zh) |
CA (1) | CA2946636A1 (zh) |
WO (1) | WO2015161463A1 (zh) |
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WO2018071208A1 (en) * | 2016-10-14 | 2018-04-19 | Qualcomm Incorporated | Rach procedures using multiple prach transmissions |
CN108139951A (zh) * | 2015-11-04 | 2018-06-08 | 谷歌有限责任公司 | 针对在通知数据之间的亲和度的通知捆集 |
CN110267348A (zh) * | 2019-05-27 | 2019-09-20 | 中国联合网络通信集团有限公司 | 一种数据传输方法及设备 |
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US10223530B2 (en) | 2013-11-13 | 2019-03-05 | Proofpoint, Inc. | System and method of protecting client computers |
CN105992328B (zh) * | 2015-01-30 | 2019-07-09 | 华为技术有限公司 | 一种前导序列的发送方法及装置 |
CN107528668B (zh) * | 2016-06-21 | 2021-09-24 | 中兴通讯股份有限公司 | 一种数据传输方法及设备 |
US20190045281A1 (en) * | 2017-08-07 | 2019-02-07 | Thomas Meek | Low power, high redundancy point-to-point telemetry system |
CN110392442B (zh) * | 2018-04-18 | 2022-06-14 | 华为技术有限公司 | 通信方法及装置 |
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- 2014-04-23 CN CN201480001089.1A patent/CN105210317A/zh active Pending
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CN110267348B (zh) * | 2019-05-27 | 2022-08-02 | 中国联合网络通信集团有限公司 | 一种数据传输方法及设备 |
Also Published As
Publication number | Publication date |
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CN105210317A (zh) | 2015-12-30 |
CA2946636A1 (en) | 2015-10-29 |
JP2017518673A (ja) | 2017-07-06 |
EP3128693A1 (en) | 2017-02-08 |
US20170041888A1 (en) | 2017-02-09 |
EP3128693A4 (en) | 2017-03-01 |
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