WO2015010332A1 - 一种数据传输的方法、设备与系统 - Google Patents
一种数据传输的方法、设备与系统 Download PDFInfo
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- WO2015010332A1 WO2015010332A1 PCT/CN2013/080221 CN2013080221W WO2015010332A1 WO 2015010332 A1 WO2015010332 A1 WO 2015010332A1 CN 2013080221 W CN2013080221 W CN 2013080221W WO 2015010332 A1 WO2015010332 A1 WO 2015010332A1
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- WIPO (PCT)
- Prior art keywords
- preamble
- base station
- channel resource
- user equipment
- subframe
- Prior art date
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 138
- 238000000034 method Methods 0.000 title claims abstract description 103
- 230000008569 process Effects 0.000 claims abstract description 42
- 238000004891 communication Methods 0.000 claims abstract description 21
- 230000000977 initiatory effect Effects 0.000 claims abstract description 6
- 238000012545 processing Methods 0.000 claims description 86
- 230000011664 signaling Effects 0.000 claims description 28
- 101001096578 Homo sapiens Rhomboid domain-containing protein 3 Proteins 0.000 claims description 22
- 102100037471 Rhomboid domain-containing protein 3 Human genes 0.000 claims description 22
- 230000001934 delay Effects 0.000 claims description 21
- 238000010586 diagram Methods 0.000 description 14
- 230000002776 aggregation Effects 0.000 description 5
- 238000004220 aggregation Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000003111 delayed effect Effects 0.000 description 4
- 230000003993 interaction Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
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Classifications
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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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
- H04L27/2613—Structure of the reference signals
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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
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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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
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
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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
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
- H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
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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
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
Definitions
- the present invention relates to the field of communications, and in particular, to a method, device and system for data transmission. Background technique
- CA Carrier Aggregation
- UE User Equipment
- CCs Component Carriers
- the CA technology enables multiple base stations to simultaneously bear the transmission of user equipment data services.
- the UEs in the common coverage area of multiple adjacent base stations can aggregate the cells provided by multiple base stations, and multiple base stations simultaneously bear user equipment data.
- the transmission of traffic, in this process requires the UE to maintain data synchronization with multiple base stations.
- the specific implementation of the CA technology is as follows:
- the initial uplink transmission time advancement TA (TA) is obtained between the UE and the base station by random access, and then the base station continuously receives the uplink data according to the time. Adjusting the uplink transmission of the UE.
- the UE sends a preamble to the base station.
- the preamble sent by the UE in a cell is calculated according to the cell identifier and the parameters included in the broadcast message.
- the dedicated preamble is uniformly allocated and used by the base station.
- the common preamble is selected and used by the UE.
- the UE After the UE decides to initiate random access, it randomly selects one from the common preamble resource pool and sends it to the base station. If the UE has uplink data to transmit, the UE selects a preamble to initiate random access based on contention. If the base station has downlink data to transmit, the base station selects a dedicated preamble for the UE, and notifies the UE of the dedicated preamble. The UE initiates random access. Since this preamble is dedicated, it does not collide with other UEs. This random access is called non-contention random access.
- the prior art is directed to carrier aggregation of cells in a single base station, but involves a carrier aggregation scenario between multiple base stations. How to implement random access of user equipments and different base stations is a problem that the industry is expected to solve.
- Embodiments of the present invention provide a data transmission method, device, and system, which can be implemented
- the user equipment performs random access simultaneously with multiple base stations, which reduces the delay of random access of the user equipment and multiple base stations, and accelerates the process of random access of the user equipment to multiple base stations.
- the first aspect provides a data transmission method, where the user equipment acquires a first preamble and a second preamble, where the first preamble corresponds to a cell set of a primary time advance group PTAG of the first base station, and the second preamble corresponds to a second a set of cells of the secondary time advance group STAG of the base station;
- the user equipment sends the first preamble to the first base station, and is configured to initiate random access according to the first front guiding to the first base station;
- the user equipment sends the second preamble to the second base station, where the second base station initiates random access according to the second front.
- the method further includes:
- the user equipment acquires a first channel resource, where the first channel resource is a physical random access channel PRACH resource of the first base station, and the first channel resource includes a subframe to be used to carry the first preamble Collection
- the user equipment acquires a second channel resource, where the second channel resource is a physical random access channel resource of the second base station, and the second channel resource includes a subframe set to be used to carry the second preamble .
- the acquiring, by the user equipment, the first channel resource includes:
- the acquiring, by the user equipment, the second channel resource includes:
- the subframe set to be used for carrying the first preamble in the first channel resource and the subframe set to be used to carry the second preamble in the second channel resource are different in time slot.
- the user equipment sends the first preamble to the first base station and the second preamble to the second base station, where the method includes:
- the user equipment sends the second preamble to the second base station by using the subframe that carries the second preamble.
- the method further includes:
- the user equipment delays sending the first preamble to the first base station to other subframes, so that the sending time of the first preamble does not overlap with the sending time of the second preamble;
- the user equipment delays sending the second preamble to the second base station to other subframes, so that the sending time of the first preamble does not overlap with the sending time of the second preamble;
- the user equipment delays sending the time of the first preamble corresponding to the contention of the random access to the first base station to other subframes, so as to facilitate the first
- the transmission time of the preamble does not overlap with the transmission time of the second preamble
- the user equipment delays sending the time of the second preamble corresponding to the contention of the random access to the second base station to other subframes, so as to facilitate the first
- the transmission time of the preamble does not overlap with the transmission time of the second preamble
- the user equipment delays sending the first preamble to the first base station Time to the next subframe of the subframe to be used for carrying the first preamble, so that the transmission time of the first preamble does not overlap with the transmission time of the second preamble;
- a time in the second channel resource that is to be used to carry the next subframe of the first preamble is earlier than a subframe in the first channel resource to be used to carry the second preamble
- the user equipment delays sending the second preamble to the second base station to a next subframe of a subframe to be used for carrying the second preamble, so as to facilitate the first
- the transmission time of the preamble does not overlap with the transmission time of the second preamble.
- the user equipment sends the first preamble to the first base station and the second preamble to the second base station, which specifically includes:
- the user equipment selects a subframe that carries the first preamble in the first channel resource and a subframe that carries the second preamble in the second channel resource, where the subframe that carries the first preamble
- the sum of the transmit power and the transmit power of the subframe carrying the second preamble is less than or equal to the maximum transmit power of the user equipment
- the user equipment sends the second preamble to the second base station by using the subframe that carries the second preamble.
- the user equipment sends the first preamble to the first base station, and specifically includes:
- the user equipment delays sending a message corresponding to the first preamble to the first base station a time of three to other subframes, where the sending time of the message 3 corresponding to the first preamble and the sending time of the second preamble do not overlap;
- the user equipment cancels the sending of the message three, where the message three corresponds to the first preamble;
- the user equipment sends the second preamble to the second base station, which specifically includes:
- the user equipment delays sending the message corresponding to the second preamble to the second base station to another subframe, where the sending time of the message 3 corresponding to the second preamble and the first preamble are The sending time does not overlap;
- the user equipment cancels the sending of the message three, and the message three corresponds to the second preamble.
- the user equipment sends the The first preamble and the sending of the second preamble to the second base station include:
- a method for data transmission including:
- the first base station performs random access with the user equipment according to the first preamble
- the second preamble required for the user equipment to perform random access with the second base station corresponds to the cell set of the secondary time advance group STAG of the second base station.
- the method before the receiving, by the base station, the first preamble or the second preamble sent by the user equipment, the method further includes:
- the first base station is configured with a first channel resource, where the first channel resource is a physical random access channel (PRACH) resource of the first base station, and the first channel resource includes a child to be used to carry the first preamble Frame collection.
- PRACH physical random access channel
- the method further includes:
- the base station sends a system broadcast or dedicated signaling to the user equipment, where the system broadcast includes the first channel resource;
- the subframe set to be used to carry the second preamble and the subframe set to be used to carry the first preamble in the second channel resource of the second channel resource acquired by the user equipment are in a time slot. It is different.
- the first base station configuring the first channel resource specifically: the first base station Receiving a second channel resource sent by the second base station; The first base station configures the first channel resource for the user equipment according to the second channel resource.
- the method further includes:
- the first base station sends, to the user equipment, a part of the first channel resource that does not intersect with the second channel resource, where a part of the first channel resource that does not intersect with the second channel resource is
- the set of subframes to be used for carrying the first preamble and the set of subframes to be used for carrying the second preamble in the second channel resource are different in time slots.
- a third aspect provides a user equipment, including a processing unit and a sending unit, where the processing unit is configured to acquire a first preamble and a second preamble, where the first preamble corresponds to a cell set of a primary time advance group PTAG of the first base station.
- the second preamble corresponds to a set of STAG cells of the secondary time advance group of the second base station;
- the sending unit is configured to send, to the first base station, the first preamble acquired by the processing unit;
- the processing unit is further configured to initiate random access according to the first pre-direction to the first base station;
- the sending unit is further configured to send, to the second base station, the second preamble acquired by the processing unit;
- the processing unit is further configured to initiate random access according to the second pre-direction to the second base station.
- the user equipment further includes a receiving unit
- the receiving unit is configured to acquire a first channel resource, where the first channel resource is a physical random access channel (PRACH) resource of the first base station, where the first channel resource is to be used to carry the first preamble Collection of subframes;
- PRACH physical random access channel
- the receiving unit is further configured to acquire a second channel resource, where the second channel resource is a physical random access channel resource of the second base station, where the second channel resource is to be used to carry the second preamble Subframe collection.
- the second channel resource is a physical random access channel resource of the second base station, where the second channel resource is to be used to carry the second preamble Subframe collection.
- the receiving unit is specifically configured to receive, by using a system broadcast message, the first channel resource sent by the first base station;
- the receiving unit is specifically configured to receive, by using dedicated signaling, the second channel resource sent by the second base station;
- the subframe set to be used for carrying the first preamble in the first channel resource and the subframe set to be used to carry the second preamble in the second channel resource are different in time slot.
- the processing unit is specifically configured to determine, in the first channel resource, a subframe that carries the first preamble and a subframe that carries the second preamble in the second channel resource, where the first preamble is sent. The time does not overlap with the transmission time of the second preamble;
- the sending unit is configured to send the first preamble to the first base station by using a subframe that is determined by the processing unit and that carries the first preamble;
- the sending unit is specifically configured to send the second preamble to the second base station by using a subframe that is determined by the processing unit and that carries the second preamble.
- the processing unit is further configured to delay sending the first preamble to the first base station to other sub-times. a frame, so that the transmission time of the first preamble does not overlap with the transmission time of the second preamble;
- the processing unit is further configured to delay sending the second preamble to the second base station to another subframe, so that the sending time of the first preamble and the sending time of the second preamble are not delivered.
- the processing unit is specifically used to delay the location Transmitting, by the first base station, the time of the first preamble corresponding to the contention of the random access to the other subframes, so that the sending time of the first preamble does not overlap with the sending time of the second preamble;
- the processing unit is further configured to delay sending the time of the second preamble corresponding to the contention of the random access to the second base station to another subframe, so that The transmission time of the first preamble does not overlap with the transmission time of the second preamble;
- the processing unit is specifically configured to delay sending the first preamble to the first base station to a next subframe of a subframe to be used to carry the first preamble, so as to facilitate The sending time of the first preamble does not overlap with the sending time of the second preamble;
- a time in the second channel resource that is to be used to carry the next subframe of the first preamble is earlier than a subframe in the first channel resource to be used to carry the second preamble
- the processing unit is specifically configured to delay sending the second preamble to the second base station to a next subframe of a subframe to be used for carrying the second preamble, so as to facilitate The transmission time of the first preamble does not overlap with the transmission time of the second preamble.
- the processing unit is configured to: select, in the first channel resource, a subframe that carries the first preamble and a subframe that carries the second preamble in the second channel resource, where the bearer is first The sum of the transmit power of the preamble subframe and the transmit power of the subframe carrying the second preamble is less than or equal to the maximum transmit power of the user equipment;
- the sending unit is specifically configured to send the first preamble to the first base station by using a subframe that is selected by the processing unit and that carries the first preamble;
- the sending unit is specifically configured to carry the second preamble selected by the processing unit
- the subframe transmits the second preamble to the second base station.
- the processing unit is specifically configured to delay sending the message corresponding to the first preamble to the first base station to another subframe, where the sending time and the message corresponding to the first preamble are three The sending time of the second preamble does not overlap;
- the processing unit is specifically configured to adjust a transmit power of the subframe that carries the message 3 corresponding to the first preamble, where the adjusted bearer carries the subframe corresponding to the message 3 of the first preamble Transmitting power and a sum of transmit powers of the second preamble-bearing subframes in the second channel resource being less than or equal to a maximum transmit power of the user equipment;
- the processing unit is specifically configured to cancel the sending of the message 3.
- the message three corresponds to the first preamble;
- the processing unit is specifically configured to delay sending the message corresponding to the second preamble to the second base station to another subframe, where the sending time and the message corresponding to the second preamble are The sending time of the first preamble does not overlap;
- the processing unit is specifically configured to adjust a transmit power of the subframe that carries the message 3 corresponding to the second preamble, where the adjusted bearer carries the subframe corresponding to the message 3 of the second preamble Transmitting power and a sum of transmit powers of the first preamble-bearing subframes in the first channel resource being less than or equal to a maximum transmit power of the user equipment;
- the processing unit is specifically configured to cancel sending the message three, where the message three corresponds to The second preamble.
- the user equipment according to the third aspect the first or the second possible implementation manner of the third aspect, in a seventh possible implementation manner;
- the sending unit is specifically configured to send the first preamble acquired by the processing unit to the first base station and the second preamble obtained by the processing unit to the second base station;
- the sending unit is configured to send, to the second base station, a second preamble acquired by the processing unit, in the process of performing random access by the user equipment;
- the transmitting unit is configured to send, to the first base station, a first preamble acquired by the processing unit, in a random access process performed by the user equipment and the second base station.
- a base station in a fourth aspect, includes a receiving unit and an access unit: the receiving unit is configured to receive a first preamble sent by the user equipment, where the first preamble corresponds to the first base station The set of cells of the PTAG in the main time advance group;
- the access unit is configured to perform random access with the user equipment according to the first preamble received by the receiving unit during a random access process performed by the user equipment and the second base station;
- the second preamble required for the user equipment to perform random access with the second base station corresponds to the cell set of the secondary time advance group STAG of the second base station.
- the access unit is further configured to configure, by the user equipment, a first channel resource, where the first channel resource is a physical random access channel (PRACH) resource of the base station, and the first channel resource includes a to-be-used A set of subframes of the first preamble.
- a first channel resource is a physical random access channel (PRACH) resource of the base station, and the first channel resource includes a to-be-used A set of subframes of the first preamble.
- PRACH physical random access channel
- the base station further includes a sending unit:
- the sending unit is configured to send a system broadcast or a dedicated signaling to the user equipment, where the system broadcasts a first channel resource configured by the access unit;
- the subframe set to be used to carry the second preamble and the subframe set to be used to carry the first preamble in the second channel resource of the second channel resource acquired by the user equipment are in a time slot. It is different.
- the receiving unit is further configured to receive the second channel resource that is sent by the second base station, where the access unit is further configured to configure the first channel for the user equipment according to the second channel resource that is received by the receiving unit. Resources.
- the receiving unit is further configured to receive the second channel resource that is sent by the second base station, where the sending unit is further configured to send, to the user equipment, a second channel that is received by the receiving unit in the first channel resource. a portion of the first channel resource to be used for carrying the first preamble and the second channel resource to be used in a portion of the first channel resource that does not intersect the second channel resource
- the set of subframes carrying the second preamble are different in time slots.
- a fifth aspect provides a user equipment, where the user equipment includes: at least one processor, a memory, a transmitter, a receiver, and a data bus, where the data bus is used to implement the processor, the memory, the receiver, and the a connection and communication between the transmitters, where the processor is configured to acquire a first preamble and a second preamble by using the receiver, where the first preamble corresponds to a cell set of a primary time advance group PTAG of the first base station, where Determining, by the second preamble, a set of STAG cells corresponding to the secondary time advance group of the second base station;
- the processor is further configured to send, by using the transmitter, the first preamble to the first base station, where the first base station initiates random access according to the first pre-direction;
- the processor is further configured to send, by using the transmitter, the second preamble to the second base station, where the second base station initiates random access according to the second front.
- the processor is further configured to acquire, by using the receiver, a first channel resource, where the first channel resource is the first base station a physical random access channel PRACH resource, where the first channel resource includes a subframe set to be used to carry the first preamble;
- the processor is further configured to acquire, by the receiver, a second channel resource, the second channel
- the resource is a physical random access channel resource of the second base station, and the second channel resource includes a subframe set to be used to carry the second preamble.
- the processor is further configured to receive, by using a system broadcast message received by the receiver, the first channel resource sent by the first base station;
- the processor is further configured to receive, by using dedicated signaling received by the receiver, the second channel resource sent by the second base station;
- the subframe set to be used for carrying the first preamble in the first channel resource and the subframe set to be used to carry the second preamble in the second channel resource are different in time slot.
- the processor is further configured to:
- the processor is further configured to send, by the transmitter, the first preamble to the first base station by using the subframe that carries the first preamble;
- the processor is further configured to send, by the transmitter, the second preamble to the second base station by using the subframe that carries the second preamble.
- the processor is further configured to delay sending the first preamble to the first base station to another subframe, So that the transmission time of the first preamble does not overlap with the transmission time of the second preamble;
- the processor is further configured to delay sending the second preamble to the second base station to another subframe, so that the sending time of the first preamble does not overlap with the sending time of the second preamble; or,
- the processor is further configured to delay sending the time of the first preamble corresponding to the contention of the random access to the first base station to other subframes, so as to facilitate The sending time of the first preamble does not overlap with the sending time of the second preamble;
- the processor is further configured to delay sending the time of the second preamble corresponding to the contention of the random access to the second base station to other subframes, so as to facilitate The sending time of the first preamble does not overlap with the sending time of the second preamble;
- the processor is further configured to delay sending the first preamble to the first base station to a next subframe of a subframe to be used for carrying the first preamble, so as to facilitate The sending time of the first preamble does not overlap with the sending time of the second preamble;
- a time in the second channel resource that is to be used to carry the next subframe of the first preamble is earlier than a subframe in the first channel resource to be used to carry the second preamble
- the processor is further configured to delay sending the second preamble to the second base station to a next subframe of a subframe to be used for carrying the second preamble, so as to facilitate The transmission time of the first preamble does not overlap with the transmission time of the second preamble.
- the processor is specifically configured to select a subframe that carries the first preamble in the first channel resource and a subframe that carries the second preamble in the second channel resource, where the first preamble is carried
- the sum of the transmit power of the subframe and the transmit power of the subframe carrying the second preamble is less than or equal to the maximum transmit power of the user equipment;
- the processor is further configured to send, by the transmitter, the first preamble to the first base station by using the subframe that carries the first preamble;
- the processor is further configured to pass, by the transmitter, the subframe that carries the second preamble Transmitting the second preamble to the second base station.
- the processor is specifically configured to delay sending the message corresponding to the first preamble to the first base station to another subframe, the sending time of the message 3 corresponding to the first preamble, and the The transmission time of the second preamble does not overlap;
- the processor is specifically configured to adjust, according to a transmit power of a subframe that carries the message 3 corresponding to the first preamble, where the adjusted bearer transmits the subframe corresponding to the message 3 of the first preamble
- the sum of the power and the transmit power of the subframe carrying the second preamble in the second channel resource is less than or equal to a maximum transmit power of the user equipment
- the processor is specifically configured to cancel the sending of the message three, where the message three corresponds to the first preamble;
- the processor is specifically configured to delay sending the message corresponding to the second preamble to the second base station to another subframe, where the sending time of the message 3 corresponding to the second preamble and the The transmission time of the first preamble does not overlap;
- the processor is specifically configured to adjust a transmit power of a subframe that carries a message 3 corresponding to the second preamble, where the adjusted bearer transmits the subframe corresponding to the message 3 of the second preamble
- the sum of the power and the transmit power of the subframe in which the first preamble is carried in the first channel resource is less than or equal to the maximum transmit power of the user equipment
- the processor is specifically configured to cancel the sending of the message 3.
- the message three corresponds to the second preamble.
- the processor is specifically configured to send the first preamble to the first base station and the second preamble to the second base station by using the transmitter;
- the user equipment is configured to perform the random access process with the first base station, where the processor is specifically configured to send the second preamble to the second base station by using the transmitter;
- a base station includes: at least one processor, a memory, a receiver, and a data bus, where the data bus is used to implement a connection between the processor, the memory, and the receiver, and Communication
- the processor is configured to receive, by the receiver, a first preamble sent by the user equipment, where the first preamble corresponds to a cell set of a primary time advance group PTAG of the first base station; And performing random access according to the first preamble and the user equipment in a random access process between the user equipment and the second base station;
- the second preamble required for the user equipment to perform random access with the second base station corresponds to the cell set of the secondary time advance group STAG of the second base station.
- the processor is further configured to configure, by the user equipment, a first channel resource, where the first channel resource is a physical random access channel (PRACH) resource of the base station, and the first channel resource includes a to-be-used The first preamble of the set of subframes.
- a first channel resource is a physical random access channel (PRACH) resource of the base station, and the first channel resource includes a to-be-used The first preamble of the set of subframes.
- PRACH physical random access channel
- the base station further includes a transmitter connected to the data bus;
- the processor sends a system broadcast or a dedicated signal to the user equipment by using the transmitter, where the system broadcast includes the first channel resource;
- the second channel resource acquired by the user equipment is to be used to carry the second front
- the set of pilots is different from the set of subframes in the first channel resource to be used for carrying the first preamble on a time slot.
- the base station is described in a first possible manner, in a third possible implementation:
- the processor is further configured to receive, by the receiver, a second channel resource sent by the second base station;
- the processor is further configured to configure the first channel resource for the user equipment according to the second channel resource.
- the processor is further configured to receive, by the receiver, a second channel resource sent by the second base station;
- the processor is further configured to send, by the sender, a part of the first channel resource that does not intersect the second channel resource, where the first channel resource is the second
- the set of subframes to be used for carrying the first preamble and the set of subframes to be used for carrying the second preamble in the second channel resource are different in time slots in the part where the channel resources are not intersected.
- the seventh aspect provides a communication system, including at least two base stations and at least one user equipment, where the base station is the foregoing base station, where one base station is used as the first base station, and at least one base station is used as the second base station, and the user equipment is used. For the above user equipment.
- the user equipment can simultaneously send the preamble used as the random access to multiple base stations, so that the user equipment simultaneously initiates parallel random access to multiple base stations, and reduces The delay of random access by the user equipment and multiple base stations accelerates the process of random access by the user equipment to multiple base stations.
- FIG. 1 is a schematic structural diagram of a communication system according to an embodiment of the present invention
- FIG. 2 is a schematic structural diagram of a user equipment according to an embodiment of the present invention
- FIG. 3 is a schematic diagram of a data transmission method according to an embodiment of the present invention
- FIG. 4 is a schematic structural diagram of a base station apparatus according to an embodiment of the present invention
- FIG. 6 is a schematic structural diagram of a user equipment according to another embodiment of the present invention
- FIG. 7 is a schematic flowchart of a data transmission method according to an embodiment of the present invention
- FIG. 9 is a schematic diagram of signaling interaction of a data transmission method according to another embodiment of the present invention.
- FIG. 10 is a schematic diagram of a data transmission method according to another embodiment of the present invention.
- FIG. 1 is a schematic diagram of another data transmission method according to another embodiment of the present invention.
- FIG. 1 is a schematic diagram showing still another principle of a data transmission method according to another embodiment of the present invention.
- FIG. 13 is a schematic diagram showing another principle of a data transmission method according to another embodiment of the present invention.
- FIG. 14 is a schematic diagram of signaling interaction of a data transmission method according to another embodiment of the present invention.
- FIG. 15 is a schematic diagram of a data transmission method according to another embodiment of the present invention.
- FIG. 16 is a schematic diagram of another data transmission method according to another embodiment of the present invention.
- the terminal a device that provides voice and/or data connectivity to a user, including a wireless terminal or a wired terminal.
- the wireless terminal can be a handheld device with wireless connectivity, or other processing device connected to a wireless modem, via a wireless access network with one or more cores A mobile terminal that communicates with the heart network.
- the wireless terminal can be a mobile phone (or "cellular" phone) and a computer with a mobile terminal.
- the wireless terminal can also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device.
- the wireless terminal can be a mobile station (MS), an access point (AP), or a user equipment (UE).
- MS mobile station
- AP access point
- UE user equipment
- the above terminals are collectively referred to as UEs in various embodiments of the present invention.
- a base station may refer to a device in an access network that communicates with a wireless terminal over one or more cells on an air interface.
- the base station may be a base transceiver station (BTS) in a global system for mobile communications (GSM) or code-division multiple acces (CDMA), or may be a broadband code division.
- BTS base transceiver station
- GSM global system for mobile communications
- CDMA code-division multiple acces
- a base station in the case of a wideband CDMA (WCDMA) (English: NodeB), or an evolved base station (English: evolutional Node B, BS or e_NodeB) in Long Term Evolution (LTE), or It is a base station in a subsequent evolution network, which is not limited by the present invention.
- the embodiment of the present invention is applied to a scenario in which a user equipment and a plurality of base stations perform random access in a communication system.
- the user equipment UE sends a preamble to the base station, and the base station acquires an initial uplink sending time according to the preamble sent by the user equipment.
- the advance amount TA, the uplink transmission time advance amount used by the user equipment in different cells may be the same or different.
- a set of multiple cells using the same uplink transmission time is called a Timing Advance Group (TAG), and cells in the time advance group TAG are located on the same base station; different time advance groups may be located in the same base station. It can also be located on different base stations.
- TAG Timing Advance Group
- the cell that the user equipment initially accesses is called the primary cell (PCell) of the user equipment, and the other cell is called the secondary cell (SCell).
- the time-advance group of the primary cell is called the primary time advance group. Timing Advance Group, PTAG), other time advance group 'J is called secondary time alignment group (STAG).
- PTAG Timing Advance Group
- STAG secondary time alignment group
- the base station configures the secondary cell for the user equipment.
- a user equipment has only one primary cell, but may have multiple secondary cells.
- the data of all logical channels of the base station where the time advance group is located can be counted by the cell and user equipment on the time advance group. According to transmission. For a logical channel, data can be transmitted as long as the base station has successful random access.
- an embodiment of the present invention provides a communication system, as shown in FIG. 1, including at least two base stations (a first base station BS1, a second base station BS2) and at least one user equipment UE31, a first base station BS1, and a second
- the base station BS2 and the user equipment UE31 (the first base station BS1 and the second base station BS2 provide a random access service for the user equipment UE31-UE3k at the same time) together constitute the communication system, wherein the first base station is the base station where the PTAG cell of the user equipment UE31 is located.
- the second base station is a base station where at least one STAG cell of the user equipment UE31 is located.
- a user equipment (which can be used as the UE 31-UE3k as shown in FIG. 1) is provided, which is applied to the communication system provided in FIG. 1.
- the user equipment 2 includes: a processing unit 21 and a sending Unit 11.
- the processing unit 21 is configured to acquire the first preamble and the second preamble, where the first preamble corresponds to the cell set of the primary time advance group PTAG of the first base station BS1, and the second preamble corresponds to the STAG cell set of the secondary time advance group of the second base station BS2.
- the transmitting unit 22 is configured to send the first preamble acquired by the processing unit 21 to the first base station BS1.
- the processing unit 21 is further configured to initiate random access according to the first pre-directed first base station BS1.
- the transmitting unit 22 is further configured to send the second preamble acquired by the processing unit 21 to the second base station BS2.
- the processing unit 21 is further configured to initiate random access according to the second front-guided second base station BS2. Further, referring to FIG. 2, the user equipment 2 further includes a receiving unit 23;
- the receiving unit 23 is configured to acquire a first channel resource, where the first channel resource is a physical random access channel PRACH resource of the first base station, where the first channel resource includes a subframe set to be used to carry the first preamble.
- the receiving unit 23 is further configured to acquire a second channel resource, where the second channel resource is a physical random access channel resource of the second base station, and the second channel resource includes a subframe set to be used to carry the second preamble.
- the receiving unit 23 is specifically configured to receive, by using a system broadcast message, a first channel resource sent by the first base station BS1.
- the receiving unit 23 is specifically configured to receive, by using dedicated signaling, the second message sent by the second base station BS2.
- Road resources
- the set of subframes to be used for carrying the first preamble in the first channel resource and the set of subframes to be used for carrying the second preamble in the second channel resource are different in time slot.
- the second base station when the second channel resource is used only for the user equipment 2 to carry the second preamble, the second base station sends the second channel resource to the user equipment 2 by using dedicated signaling instead of system broadcast, so as to prevent the user equipment from searching for system broadcast. , reducing the energy consumption of user equipment.
- the processing unit 21 is further configured to determine, in the first channel resource, the subframe that carries the first preamble and the second channel that carries the second preamble, where the first preamble is sent.
- the time is not overlapped with the sending time of the second preamble.
- the user equipment sends the first preamble to the first base station BS1 through the first frame structure, and sends the second preamble to the second base station BS2 through the second frame structure.
- the sending unit 23 is specifically configured to send the first preamble to the first base station by using the subframe that carries the first preamble determined by the processing unit 21;
- the sending unit 23 is specifically configured to send the second preamble to the second base station by using the subframe that carries the second preamble determined by the processing unit 21.
- subframe 2 in the first frame structure, subframe 2, subframe 5, and subframe 8 are subframes having a first channel resource, and subframe 2 is the earliest appearance.
- a subframe having a first channel resource in a second frame structure, a subframe 2, a subframe 4, and a subframe 6 are subframes having a second channel resource, and subframe 2 is an earliest appearance having a second channel resource. Subframe.
- the sending time of the first preamble overlaps with the sending time of the second preamble, and specifically includes two cases:
- the first subframe having the first channel resource in the first frame structure and the first subframe having the second channel resource in the second frame structure are located in the same time slot, as shown in FIG. 3( a ),
- the first preamble is located in the subframe 2 of the first frame structure
- the second preamble is located in the subframe 2 of the second frame structure.
- the transmission time of the subframe 1 of the first frame structure is 2-3
- the second frame structure is The transmission time of subframe 1 is 2-3.
- the first subframe having the first channel resource in the first frame structure and the first subframe having the second channel resource in the second frame structure are located in different time slots, but a certain preamble occupies more than one subframe.
- the occupied subframe is in the same time slot as the subframe in which the other preamble is located, as shown in the figure
- the first preamble is located in the subframe 2 of the first frame structure
- the second preamble is located in the subframe 1 of the second frame structure
- the transmission time of subframe 2 is 2-3
- the transmission time of subframe 1 of the second frame structure is 1-3.
- the transmission time of the first preamble does not overlap with the transmission time of the second preamble.
- the processing unit 21 delays sending the time of one of the first preamble and the second preamble to other subframes.
- the processing unit 21 delays sending the first preamble to the first base station to other subframes, so that the sending time of the first preamble does not overlap with the sending time of the second preamble, as shown in FIG. 3( a).
- the first preamble and the second preamble are both located in the subframe 1, the first preamble may be deferred to the subframe 5 or the subframe 8, wherein the delay to the subframe 5 is delayed to be delayed to the delay of the subframe 8 ;
- the processing unit 21 delays sending the second preamble to the second base station to other subframes, so that the transmission time of the first preamble does not overlap with the transmission time of the second preamble, as shown in FIG. 3( a ), when the first When the preamble and the second preamble are both located in the subframe 2, the second preamble may be deferred to the subframe 4 or the subframe 6, wherein the delay to the subframe 4 is lower than the delay to the subframe 6; or
- the processing unit 21 delays transmitting the time of the first preamble corresponding to the contention of the random access to the first base station to other subframes, so as to facilitate the transmission time of the first preamble and the second preamble.
- the transmission time does not overlap.
- the first preamble can be deferred to subframe 5 or subframe 8, where, delay to sub The delay of frame 5 is lower than the delay delayed to subframe 8;
- the processing unit 21 delays transmitting the time of the second preamble corresponding to the contention of the random access to the second base station to other subframes, so as to facilitate the transmission time of the first preamble and the second preamble.
- the transmission time does not overlap.
- the second preamble can be deferred to the subframe 4 or the subframe 6. In the delay, the delay to subframe 4 is lower than the delay to subframe 6;
- the processing unit 21 delaying sending the first preamble time to the other subframes to the first base station, so that the sending time of the first preamble does not overlap with the sending time of the second preamble;
- the processing unit 21 delaying the sending of the second preamble to the second subframe to the other subframes, so that the sending time of the first preamble does not overlap with the sending time of the second preamble, specifically, as shown in FIG.
- the next subframe of the subframe carrying the first preamble is the subframe 5 of the first frame structure
- the next subframe of the subframe to be used for carrying the second preamble is the subframe 4 of the second frame structure, and then the postponed
- the processing unit 21 delays the occurrence of the subframe in which the subframe is present later. For example, as shown in FIG. 3 (b), the second preamble is located in the subframe 1, and the first preamble is located in the subframe 2, and the first preamble is delayed to the subframe 5.
- the processing unit 21 is specifically configured to delay sending the message corresponding to the first preamble to the first subframe to the other subframes, and the sending time of the message 3 corresponding to the first preamble and the sending time of the second preamble are not overlapped;
- the processing unit 21 is specifically configured to adjust a transmit power of a subframe that carries the message 3 corresponding to the first preamble, where the adjusted bearer corresponds to the transmit power of the subframe of the first preamble message 3 and the second channel resource carries the second frame.
- the sum of the transmit powers of the preamble subframes is less than or equal to the user equipment Maximum transmit power;
- the processing unit 21 is specifically configured to cancel the sending of the message 3.
- the message 3 corresponds to the first preamble; when the sending time of the message 3 corresponding to the second preamble overlaps with the sending time of the first preamble:
- the processing unit 21 is specifically configured to delay sending the message corresponding to the second preamble to the second base station to another subframe, and the sending time of the message 3 corresponding to the second preamble and the sending time of the first preamble are not overlapped;
- the processing unit 21 is specifically configured to adjust a transmit power of a subframe that carries the message 3 corresponding to the second preamble, where the adjusted bearer corresponds to a transmit power of a subframe of the second preamble message 3 and a first bearer in the first channel resource
- the sum of the transmit powers of the preamble subframes is less than or equal to the maximum transmit power of the user equipment;
- the processing unit 21 is specifically configured to cancel the sending of the message three, and the message three corresponds to the second preamble. Further, the sending unit 22 simultaneously sends the first preamble acquired by the processing unit 21 to the first base station BS1 and the second preamble obtained by the processing unit 21 to the second base station BS2;
- the transmitting unit 11 is specifically configured to send the second preamble acquired by the processing unit 21 to the second base station BS2 during the random access process of the user equipment 2 and the first base station BS1.
- the transmitting unit 11 is specifically configured to send the first preamble acquired by the processing unit 21 to the first base station BS1 during the random access process performed by the user equipment 2 and the second base station BS2.
- the user equipment provided by the embodiment of the present invention sends a preamble used as a random access to multiple base stations, so that the user equipment initiates parallel random access to multiple base stations, and reduces random access of the user equipment and multiple base stations.
- the delay accelerates the process of random access by user equipment to multiple base stations.
- a base station 4 is applied to a first base station BS1 and a second base station BS2 in the communication system provided in FIG. 1, wherein the first base station BS1
- the structure of the second base station BS2 may be the same, including: a receiving unit 41 and an access unit 42.
- the receiving unit 41 of the first base station BS1 is configured to receive a first preamble sent by the user equipment, where the first preamble corresponds to a cell set of the primary time advance group PTAG of the first base station BS1.
- the access unit 42 is configured to perform random access with the user equipment according to the first preamble received by the receiving unit 41.
- the second preamble required for the user equipment to perform random access with the second base station corresponds to the cell set of the secondary time advance group STAG of the second base station.
- the access unit 42 is further configured to configure a first channel resource for the user equipment, where the first channel resource is a physical random access channel PRACH resource of the base station, and the first channel resource includes a subframe set to be used to carry the first preamble .
- the base station 4 further includes a sending unit 43;
- the sending unit 43 is configured to send system broadcast or dedicated signaling to the user equipment, where the system broadcast includes the first channel resource configured by the access unit 42;
- the subframe set to be used to carry the second preamble in the second channel resource acquired by the user equipment is different from the subframe set to be used to carry the first preamble in the first channel resource.
- the receiving unit 41 of the first base station is further configured to receive the second channel resource sent by the second base station;
- the access unit 42 is further configured to configure the first channel resource for the user equipment according to the second channel resource received by the receiving unit 41.
- the base station can prevent the subframes of the first channel resource and the second channel resource from being located in the same time slot, and the user equipment is prevented from setting the first preamble and the second preamble in the same subframe. In this case, the workload of the user equipment is reduced.
- the receiving unit 41 of the first base station is further configured to receive the second channel resource sent by the second base station;
- the sending unit 43 is further configured to send, to the user equipment, a part of the first channel resource that does not intersect with the second channel resource received by the receiving unit 41, where the part of the first channel resource that does not intersect with the second channel resource is to be used for carrying
- the set of subframes of the first preamble and the set of subframes of the second channel resource to be used for carrying the second preamble are different in time slots. Since the second channel resource is sent to the user equipment through dedicated signaling, the subframe included in the second channel resource can be adjusted according to the first channel resource, regardless of the impact on other user equipment.
- the base station provided by the embodiment of the present invention can implement random access of the user equipment and multiple base stations simultaneously by including a preamble for the user equipment to initiate random access with the user equipment, and reduce random access of the user equipment and multiple base stations.
- the delay accelerates the process of random access by user equipment to multiple base stations.
- an embodiment of the present invention further provides a user equipment 5, which is applied to the communication system provided by the foregoing embodiments, and specifically includes a processor 51, a memory 52, a transmitter 53, a receiver 54, and a data bus 55.
- the data bus 55 is used to implement connection and communication between the processor 51, the memory 52, the receiver 54, and the transmitter 53.
- the data bus 55 may be an Industry Standard Architecture (ISA) bus, a Periphera 1 Component (PCI) bus, or an Extended Industry Standard Architecture (ESA) bus. .
- ISA Industry Standard Architecture
- PCI Periphera 1 Component
- ESA Extended Industry Standard Architecture
- the bus 55 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick arrow is used in Figure 5, but it does not mean that there is only one bus or one type of bus.
- the memory 52 is used to store data or executable program code, where the program code includes computer operating instructions, which may specifically be: an operating system, an application, or the like.
- the memory 52 may include a high speed RAM memory and may also include a non-volatile memory such as at least one disk memory.
- the processor 51 may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.
- CPU Central Processing Unit
- ASIC Application Specific Integrated Circuit
- the transmitter 53 and the receiver 54 are mainly used to implement communication between the devices in this embodiment.
- the processor 51 is configured to acquire the first preamble and the second preamble through the receiver 54, the first The preamble corresponds to a set of cells of the primary time advance group PTAG of the first base station, and the second preamble corresponds to a set of STAG cells of the secondary time advance group of the second base station;
- the processor 51 is further configured to send, by using the transmitter 53, a first preamble to the first base station, where the first base station is used to initiate random access according to the first preamble;
- the processor 51 is further configured to send, by using the transmitter 53, a second preamble to the second base station, to initiate random access according to the second preamble to the second base station.
- the processor 51 is further configured to acquire, by the receiver, the first channel resource, where the first channel resource is a physical random access channel PRACH resource of the first base station, where the first channel resource includes a to-be-used to carry the first preamble. Subframe set;
- the processor 51 is further configured to acquire, by the receiver 54, a second channel resource, where the second channel resource is a physical random access channel (PRACH) resource of the second base station, and the second channel resource comprises a set of subframes to be used for carrying the second preamble.
- PRACH physical random access channel
- the processor 51 is further configured to receive, by using a system broadcast message received by the receiver, the first channel resource sent by the first base station;
- the processor 51 is further configured to receive, by using dedicated signaling received by the receiver, the second channel resource sent by the second base station;
- the subframe set to be used to carry the first preamble in the first channel resource and the subframe set to be used to carry the second preamble in the second channel resource are different in the time slot.
- the processor 51 is further configured to:
- the processor 51 is further configured to: Transmitting, by the transmitter 53, the first preamble to the first base station by using a subframe carrying the first preamble;
- the processor 51 is further configured to send, by the transmitter 53, a second preamble to the second base station by using a subframe carrying the second preamble.
- the processor 51 is further configured to delay sending the first preamble to the first base station to other subframes, so as to facilitate the first preamble.
- the sending time does not overlap with the sending time of the second preamble;
- the processor 51 is further configured to delay sending the second preamble to the second base station to other subframes, so that the sending time of the first preamble does not overlap with the sending time of the second preamble;
- the processor 51 is further configured to delay sending the first preamble corresponding to the contention of the random access to the first base station to other subframes, so as to facilitate the sending time of the first preamble and The transmission time of the second preamble does not overlap;
- the processor 51 is further configured to delay sending the second preamble corresponding to the contention of the random access to the second base station to other subframes, so as to facilitate the sending time of the first preamble and The transmission time of the second preamble does not overlap;
- the processor 5 1 is further configured to delay sending the first preamble to the first base station to other subframes, so that the sending time of the first preamble does not overlap with the sending time of the second preamble;
- the processor 5 1 is further configured to delay sending the second preamble to the second base station to other subframes, so that the sending time of the first preamble does not overlap with the sending time of the second preamble;
- the processor 5 1 Postpone the later preamble in which the sub-frame appears.
- the processor 51 is specifically configured to select a subframe that carries the first preamble in the first channel resource and a subframe that carries the second preamble in the second channel resource, and transmit the transmit power and the bearer of the subframe that carries the first preamble.
- the sum of the transmit powers of the subframes of the second preamble is less than or equal to the maximum transmit power of the user equipment;
- the processor 51 is further configured to send, by the transmitter 53, the subframe that carries the first preamble to the first base station. Send the first preamble;
- the processor 51 is further configured to send the second preamble to the second base station via the transmitter carrying the second preamble.
- the processor 5 is specifically configured to delay sending the message corresponding to the first preamble to the first subframe to the other subframes, and the sending time of the message 3 corresponding to the first preamble and the sending time of the second preamble are not overlapped;
- the processor 5 is specifically configured to adjust a transmit power of a subframe that carries the message 3 corresponding to the first preamble, where the adjusted bearer corresponds to the transmit power of the subframe of the first preamble message 3 and the second channel resource carries the second frame.
- the sum of the transmit powers of the preamble subframes is less than or equal to the maximum transmit power of the user equipment;
- the processor 5 is specifically configured to cancel the sending of the message 3, and the message 3 corresponds to the first preamble; when the sending time of the message 3 corresponding to the second preamble overlaps with the sending time of the first preamble:
- the processor 5 is specifically configured to delay sending the message corresponding to the second preamble to the second base station to other subframes, and the sending time of the message 3 corresponding to the second preamble and the sending time of the first preamble are not overlapped;
- the processor 5 is specifically configured to adjust a transmit power of a subframe that carries the message 3 corresponding to the second preamble, where the adjusted bearer corresponds to a transmit power of a subframe of the second preamble message 3 and a first bearer in the first channel resource.
- the sum of the transmit powers of the preamble subframes is less than or equal to the maximum transmit power of the user equipment;
- the processor 51 is specifically configured to cancel the sending of the message three, and the message three corresponds to the second preamble. Further, the processor 51 is specifically configured to send the first preamble to the first base station and the second preamble to the second base station by using the transmitter 53; or,
- the processor 51 is specifically configured to send the second preamble to the second base station by using the transmitter 53 during the random access process between the user equipment and the first base station;
- the processor 51 is specifically configured to send the first preamble to the first base station by using the transmitter 53.
- the user equipment provided by the embodiment of the present invention simultaneously sends a preamble used as a random access to multiple base stations, so that the user equipment simultaneously initiates parallel random access to multiple base stations, and reduces the randomness of the user equipment and multiple base stations.
- the delay of access accelerates the process of random access by user equipment to multiple base stations.
- the embodiment of the present invention further provides a base station 6 applied to a base station (refer to the first base station BS1 and the second base station BS2 in FIG. 1) in the communication system provided by the foregoing embodiments, the first base station BS1 and the second base station.
- the BS2 is identical in structure, and specifically includes a processor 61, a memory 62, a receiver 64, and a data bus 65.
- the data bus 65 is used to implement connection and communication between the processor 61, the memory 62, and the receiver 64.
- the data bus 65 may be an Industry Standard Architecture (ISA) bus, a Periphera 1 Component (PCI) bus, or an Extended Industry Standard Architecture (ESA) bus. .
- ISA Industry Standard Architecture
- PCI Periphera 1 Component
- ESA Extended Industry Standard Architecture
- the bus 65 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick arrow is used in Figure 6, but it does not mean that there is only one bus or one type of bus. among them:
- the memory 62 is used to store data or executable program code, wherein the program code includes computer operation instructions, which may specifically be: an operating system, an application, or the like.
- the memory 42 may include a high speed RAM memory and may also include a non-volatile memory such as at least one disk memory.
- the processor 61 may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.
- the receiver 64 is mainly used to implement communication between devices in this embodiment.
- the processor 61 is configured to receive, by the receiver 64, a first preamble sent by the user equipment, where the first preamble corresponds to a cell set of the primary time advance group PTAG of the first base station.
- the processor 61 is further configured to perform random access with the user equipment according to the first preamble during the random access process performed by the user equipment and the second base station.
- the base station 6 further includes a transmitter 63 connected to the data bus 65.
- the second preamble required for the user equipment to perform random access with the second base station corresponds to the cell set of the secondary time advance group STAG of the second base station.
- the processor 61 is further configured to configure a first channel resource for the user equipment, where the first channel resource is a physical random access channel PRACH resource of the first base station, and the first channel resource includes a subframe to be used to carry the first preamble set.
- the base station 6 further includes a transmitter 63 connected to the data bus 65;
- the processor 61 transmits a system broadcast or dedicated signaling to the user equipment through the transmitter 63, and the system broadcast includes the first channel resource;
- the subframe set to be used to carry the second preamble in the second channel resource acquired by the user equipment is different from the subframe set to be used to carry the first preamble in the first channel resource.
- the processor 61 of the base station 6 is further configured to receive, by the receiver 64, the second channel resource sent by the second base station;
- the processor 61 of the base station 6 is further configured to configure the first channel resource for the user equipment according to the second channel resource.
- the processor 61 of the base station 6 is further configured to receive, by the receiver 64, the second channel resource sent by the second base station;
- the processor 61 of the base station 6 is further configured to send, by using the transmitter 63, a part of the first channel resource that does not intersect with the second channel resource, where the part of the first channel resource that does not intersect with the second channel resource is to be used.
- the set of subframes to be used for carrying the second preamble in the set of subframes carrying the first preamble and the second channel resource are different in time slots.
- the base station provided by the embodiment of the present invention can obtain the preamble for the user equipment to initiate random access with the user equipment, so that the user equipment and the multiple base stations simultaneously perform random access, and reduce The delay of random access by the user equipment and multiple base stations accelerates the process of random access by the user equipment to multiple base stations.
- an embodiment of the present invention provides a data transmission method, which is applied to a user equipment provided by an apparatus embodiment of the present invention, and specifically includes the following steps:
- the user equipment acquires a first preamble and a second preamble, where the first preamble corresponds to a cell set of a primary time advance group PTAG of the first base station, and the second preamble corresponds to a STAG cell set of a secondary time advance group of the second base station.
- the user equipment sends a first preamble to the first base station, where the user equipment initiates random access according to the first front-end.
- the user equipment sends a second preamble to the second base station, where the user equipment initiates random access according to the second front-end.
- the step 702 and the step 703 are performed in the process of the step 702, and the step 702 is performed in the process of the step 702, and the step 702 and the step 703 are performed at the same time.
- step 701 the method further includes:
- the user equipment acquires a first channel resource, where the first channel resource is a physical random access channel PRACH resource of the first base station, and the first channel resource includes a subframe set to be used to carry the first preamble.
- the user equipment acquires the first channel resource, and specifically includes:
- the user equipment receives the first channel resource sent by the first base station by using a system broadcast message. 701b.
- the user equipment acquires a second channel resource, where the second channel resource is a physical random access channel resource of the second base station, and the second channel resource includes a subframe set to be used to carry the second preamble.
- the user equipment acquires the second channel resource, and specifically includes:
- the user equipment receives the second channel resource sent by the second base station by using dedicated signaling.
- an embodiment of the present invention provides another data transmission method, which is applied to a base station provided by an apparatus embodiment of the present invention, where the functions of the first base station and the second base station may be the same, and are used only for distinguishing, The method specifically includes the following steps:
- the first base station receives a first preamble sent by the user equipment.
- the first preamble corresponds to a cell set of the primary time advance group PTAG of the first base station.
- the first base station performs random access with the user equipment according to the first preamble.
- the second preamble required for the user equipment to perform random access with the second base station corresponds to the cell set of the secondary time advance group STAG of the second base station.
- step 801 the method further includes:
- the first base station configures a first channel resource, where the first channel resource is a physical random access channel PRACH resource of the first base station, and the first channel resource includes a subframe set to be used for carrying the first preamble.
- the base station transmits system broadcast or dedicated signaling to the user equipment, and the system broadcast includes the first channel resource.
- the base station When the base station is the first base station, the base station transmits a system broadcast including the first channel resource; when the base station is the second base station, the base station transmits dedicated signaling including the second channel resource to the user equipment.
- the base station can use the user equipment to initiate a random access preamble with the user, and implement random access by the user equipment and multiple base stations at the same time, thereby reducing random operation of the user equipment and multiple base stations.
- the delay of access accelerates the process of random access by user equipment to multiple base stations.
- a signaling interaction diagram is provided for the user equipment to initiate random access to the base station, where the first base station includes at least A primary time advance group PTAG cell of a user equipment carrier aggregation data transmission, and the second base station includes at least one secondary time advance group STAG cell of user equipment carrier aggregation data transmission.
- the user equipment is used as a preamble setting for initiating random access with the first base station.
- a frame structure configured to be used as a preamble for initiating random access with the second base station, in a second frame structure, and transmitting the first frame structure and the second frame structure simultaneously, wherein the first frame structure is sent to the first base station, The two frame structure is transmitted to the second base station.
- the first base station processes the random access of the user equipment according to the preamble of the primary time advance group PTAG cell
- the second base station processes the random access of the user equipment according to the preamble of the secondary time advance group STAG cell.
- the first base station sends a system broadcast that includes the first channel resource, and sends the first control information.
- the first channel resource is a PRACH resource of the first base station;
- the first control information includes a common preamble indication parameter or a dedicated preamble indication parameter, and the user equipment generates a public according to the common preamble indication parameter of the first base station and the first channel resource.
- the first preamble, or the dedicated first preamble is generated according to the dedicated preamble indication parameter of the first base station and the first channel resource.
- the second base station sends the dedicated signaling including the second channel resource, and sends the second control information.
- the second channel resource is a PRACH resource of the second base station;
- the second control information includes a common preamble indication parameter or a dedicated preamble indication parameter, and the user equipment generates a common according to the common preamble indication parameter of the second base station and the second channel resource.
- the user equipment acquires the first channel resource by using the system broadcast of the first base station, and acquires the second channel resource by using the dedicated signaling of the second base station, where the user equipment generates the first according to the first control information of the first base station and the first channel resource.
- a preamble generating a second preamble according to the second control information of the second base station and the second channel resource; and placing the first preamble on the first subframe having the first channel resource in the first frame structure, and using the second preamble Placed on the first subframe in the second frame structure with the second channel resource.
- the channel resource is used to carry a preamble on a subframe in a frame structure.
- the user equipment When the first base station sends the first control information including the dedicated preamble indication parameter to the user equipment, the user equipment generates a dedicated first preamble according to the dedicated preamble indication parameter and the first channel resource acquired in the first control information. , preparing to initiate non-competition based on the first base station Random access; when the user equipment needs to initiate a contention-based random access to the first base station, the first base station sends first control information including a common preamble indication parameter to the user equipment, and the user equipment according to the first control The common preamble indication parameter and the first channel resource obtained in the information generate a common first preamble, and prepare to initiate contention-based random access to the first base station.
- the user equipment When the second base station sends the second control information that includes the dedicated preamble indication parameter to the user equipment, the user equipment generates a dedicated second preamble according to the dedicated preamble indication parameter and the second channel resource acquired in the second control information, Preparing to initiate non-contention based random access to the second base station; when the user equipment needs to initiate the contention based random access to the second base station, the second base station sends the second control information including the common preamble indication parameter to the user The device, the user equipment, generates a common second preamble according to the common preamble indication parameter and the second channel resource acquired in the second control information, and prepares to initiate contention-based random access to the second base station.
- the user equipment sends a first frame structure and a second frame structure, where the first frame structure is sent to the first base station, and the second frame structure is sent to the second base station.
- the first base station receives the first frame structure, and obtains a first preamble in the first frame structure, so that the user equipment performs random access with the first base station according to the first preamble.
- the second base station receives the second frame structure, and obtains a second preamble in the first frame structure, so that the user equipment performs random access with the base station according to the second preamble.
- Step 903 The user equipment sets a first preamble in the first frame structure, and sets a second preamble in the second frame structure, and specifically includes the following solutions:
- Solution 1 When the transmission time of the first subframe having the first channel resource in the first frame structure and the transmission time of the first subframe having the second channel resource in the second frame structure do not overlap (transmission time) There are two cases of overlapping, and the case is described as an example. For details, see the above embodiment, which is not repeated here.
- the user equipment places the first preamble in the first frame structure and has the first channel resource.
- the second preamble is placed on the first subframe in the second frame structure having the second channel resource.
- the subframe having the first channel resource is the subframe 2, the subframe 5, and the subframe 8 in the first frame structure
- the subframe having the second channel resource is the second frame structure.
- the first subframe having the first channel resource is the subframe 2, and the first subframe in the second frame structure having the second channel resource
- the frame is subframe 4, and the transmission time of the subframe 1 of the first frame structure and the subframe 4 of the second frame structure is not There is overlap, as shown in FIG. 10(b), the user equipment places the first preamble on the first subframe having the first channel resource in the first frame structure, that is, on the subframe 2 of the first frame structure, The second preamble is placed on the first subframe of the second frame structure having the second channel resource, that is, on the fourth frame structure of the subframe.
- Solution 2 When the transmission time of the first subframe having the first channel resource in the first frame structure overlaps with the transmission time of the first subframe having the second channel resource in the second frame structure, the user equipment Selecting one of the first preamble and the second preamble, and placing another preamble on the first subframe of the frame structure corresponding to the other preamble having the channel resource corresponding to the another preamble; On the next subframe of the channel resource corresponding to the selected preamble.
- the transmission time of the first subframe having the first channel resource in the first frame structure overlaps with the transmission time of the first subframe having the second channel resource in the second frame structure As shown in FIG.
- the subframe having the first channel resource is the subframe 2 in the first frame structure, the subframe 5 and the subframe 8, and the subframe having the second channel resource is the second frame structure.
- the MAC Medium Access Control
- the first subframe having the first channel resource is subframe 2
- the first subframe having the second channel resource in the second frame structure is subframe 2
- the first frame in the first frame structure has the first
- the subframe of the channel resource and the first subframe of the second frame structure having the second channel resource are located in the same time slot, and the MAC selects one of the first preamble and the second preamble (here, taking the second preamble as an example)
- placing the first preamble in the first frame structure has the first On the subframe of the channel resource, i.e., on subframe 2 of the first frame structure
- the second preamble is placed on the next subframe having the second channel resource, i.e., subframe 4 of the second frame structure.
- the MAC selects one of the first preamble and the second preamble, and may be: selecting a first preamble, placing the second preamble in a next subframe corresponding to the second channel resource; selecting the second preamble, a preamble is placed in a next subframe corresponding to the first channel resource; a dedicated preamble is selected, and the common preamble is placed on a next subframe corresponding to the common preamble corresponding channel resource;
- Solution 3 when the transmission time of the first subframe having the first channel resource in the first frame structure overlaps with the transmission time of the first subframe having the second channel resource in the second frame structure; Calculating a power of transmitting a first subframe having a first channel resource and a subframe having a second channel resource in a first frame structure in a first frame structure, when transmitting the first frame structure has a first When the power of the first channel structure and the first frame structure of the second frame resource are less than or equal to the threshold transmission power of the user equipment, the user equipment places the first preamble in the first frame structure.
- the user equipment selects one of the first preamble and the second preamble, and places the other preamble in the frame structure corresponding to the other preamble to have the other preamble A sub-frame corresponding to channel resources; placed on the selected preamble subframe having a next preamble channel resources corresponding to the selected. As shown in FIG.
- the subframe having the first channel resource in the 1 2 ( a ) is the subframe 2, the subframe 5, and the subframe 8 in the first frame structure, and the subframe having the second channel resource is the first frame.
- the first subframe having the second channel resource is subframe 2, that is, the first subframe having the first channel resource in the first frame structure and the first one having the second channel resource in the second frame structure
- the frames are located in the same time slot, and the physical layer of the user equipment calculates the power of transmitting the first subframe having the first channel resource in the first frame structure and the subframe having the second channel resource in the second frame structure, That is, the power of the subframe 2 transmitting the first frame structure and the subframe 1 transmitting the second frame structure is calculated.
- the MAC places the first preamble at the first In the first subframe of the frame structure having the first channel resource, that is, on the subframe 2 of the first frame structure, placing the second preamble on the first subframe having the second channel resource in the second frame structure That is, on the subframe 2 of the second frame structure; when the power of the subframe 2 transmitting the first frame structure and the subframe 2 of the second frame structure is greater than the threshold transmission power of the user equipment, as shown in FIG.
- the MAC selects one of the first preamble and the second preamble (here, taking the second preamble as an example) Ming, the MAC places the first preamble on the first subframe having the first channel resource in the first frame structure, that is, on the subframe 2 of the first frame structure, and places the second preamble on the next On the subframe of the two-channel resource, that is, on the subframe 4 of the second frame structure.
- the MAC selects one of the first preamble and the second preamble, and may be the following method: selecting a second preamble, placing the second preamble in a next subframe corresponding to the second channel resource; selecting the first preamble, A preamble is placed in the next subframe corresponding to the first channel resource; a dedicated preamble is selected, and the common preamble is placed on the next subframe corresponding to the common preamble corresponding channel resource.
- Solution 4 When the transmission time of the subframe in which the channel resource corresponding to any preamble is located overlaps with the transmission time of the subframe in which the channel resource occupied by the message 3 corresponding to another preamble is located, and the other preamble is public The preamble time; the user equipment calculates the power of the subframe in which the channel resource corresponding to the channel resource corresponding to any preamble is transmitted and the channel resource occupied by the message 3 corresponding to the other preamble, wherein the message 3 may be a common preamble Strive to resolve the logo.
- the user equipment sets any of the preambles.
- the message 3 corresponding to the other preamble is placed on the subframe in which the channel resource occupied by the message 3 corresponding to the other preamble is located.
- the user equipment corresponds to another preamble.
- the message 3 is placed on the subframe in which the channel resource occupied by the message 3 of the other preamble is located, and any preamble is placed on the next subframe having the channel resource corresponding to the any preamble.
- the user equipment places any preamble on the subframe in which the channel resource corresponding to any preamble is located, and the message corresponding to the other preamble to the subframe in which the channel resource occupied by the message 3 of the other preamble is located.
- the first frame structure is sent to the first base station and the second frame structure is sent to the second base station after the transmit power of the message 3 corresponding to the other preamble is decreased.
- the user equipment only places any preamble on the subframe in which the channel resource corresponding to any preamble is located. That is, when the first preamble is a common preamble, the user equipment sets the message three in the first frame structure, and/or when the second preamble is a common preamble, the user equipment sets the message three in the second frame structure (here The first preamble is a common preamble), when the transmission time of the subframe in which the channel resource corresponding to the second preamble (ie, the second channel resource) is located, and the channel resource occupied by the message 3 corresponding to the first preamble (ie, the first channel resource)
- the transmission time of the subframe in which it is located overlaps, as shown in Figure 13, where 13 ( a ), the subframe in which the first channel resource is located is subframe 2 in the first frame structure, and the second channel resource is located.
- the subframe is the subframe 2 in the second frame structure, the subframe 4, the subframe 6 and the subframe 8.
- the subframe in which the first channel resource is located is the subframe 2 of the first frame structure, and the subframe in which the second channel resource is located
- the frame is the subframe 2 of the second frame structure, and the subframe in which the first channel resource is located is located in the same time slot as the subframe in which the second channel resource is located.
- the physical layer of the user equipment calculates the channel resource corresponding to the second preamble.
- the subframe in which it corresponds corresponds to the first preamble Power three subframes occupied by the message channel resource is located, i.e., the first transmit sub-frame structure of a frame 2 and a second sub-frame structure of the frame power of 2.
- the MAC places the first preamble message three.
- the subframe 2 and the second preamble of the first frame structure are placed on the subframe 2 of the second frame structure.
- the MAC places the second preamble on the second channel resource.
- Corresponding next subframe that is, subframe 4.
- the MAC places the first preamble message 3 on the subframe 2 of the first frame structure and the second preamble on the subframe 2 of the second frame structure, and reduces the structure of the first frame.
- the MAC only places the second preamble on the subframe 2 of the second frame structure, and cancels the transmission of the message 3 of the first preamble.
- the method further includes:
- the first base station sends the first channel resource to the second base station.
- the second base station receives the first channel resource sent by the first base station, and configures the second channel resource for the user equipment according to the first channel resource, where the subframe carried by the second channel resource and the subframe carried by the first channel resource Not the same on the time slot.
- the second base station receives the first channel resource sent by the first base station, and sends the channel resource that is not intersected with the first channel resource or the part of the disjoint channel resource of the second channel resource to the user equipment.
- the first base station and the second base station exchange and negotiate the respective PRACH resource configurations, so that the PRACH resources of the two base station cells do not collide, and the first base station sends a system broadcast including the first channel resource to Second level station.
- the first channel resource is subframe 2, subframe 5, and subframe 8 of the first frame structure.
- the second base station configures the PRACH available to the UE by using dedicated signaling. Therefore, after receiving the first channel resource sent by the first base station, the second base station may configure the second channel resource for the user equipment according to the first channel resource.
- the second base station configures only the channel resource that does not conflict with the first channel resource as the second channel resource.
- the second channel resource is configured as the subframe 4 and the subframe 6 of the second frame structure. The subframes carried by the channel resource configuration that do not conflict with the first channel resource and the subframes carried by the first channel resource are different in time slots.
- the first base station and the second base station are mutually negotiated to negotiate the respective PRACH resource configuration so that the PRACH resources of the two base station cells do not collide
- the first channel occurs.
- the resource occupies each subframe
- the transmission time of the first subframe having the first channel resource in the first frame structure and the first channel having the second channel resource in the second frame structure optionally, in order to prevent the user equipment from appearing, the transmission time of the first subframe having the first channel resource in the first frame structure and the first channel having the second channel resource in the second frame structure
- the second base station receives the first channel resource sent by the first base station, and the channel resource that does not intersect the first channel resource in the second channel resource or the part of the disjoint channel resource Send to user device.
- the first channel resource is the subframe 2 of the first frame structure, the subframe 5, and the subframe 8
- the second channel resource is the subframe 2 of the second frame structure, the subframe 4, and the subframe 6 .
- the second base station configures the PRACH available to the UE by using dedicated signaling. Therefore, after receiving the first channel resource sent by the first base station, the second base station does not intersect the first channel resource in the second channel resource.
- the channel resources ie, subframe 4 and subframe 6) are configured to the UE; or the portion of the channel resource (subframe 4 or subframe 6) that does not intersect with the first channel resource is configured to the UE.
- a user equipment placing the first preamble on the subframe 2 of the first frame structure according to the first channel resource; placing the second preamble according to the second channel resource configured by the dedicated signaling In subframe 4 (or subframe 6) of the second frame structure, at this time, the transmission time of the first subframe having the first channel resource in the first frame structure and the first frame in the second frame structure have the second The transmission time of the subframe of the channel resource does not overlap.
- the method, device and system for data transmission provided by the embodiments of the present invention implement parallel random access between the user equipment and the base station by implementing simultaneous random access between the user equipment and the multiple base stations, thereby reducing user equipment and The delay of random access by the base stations improves the speed of data service transmission between the user equipment and multiple base stations.
- Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
- a storage medium may be any available media that can be accessed by a computer.
- computer readable media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage media or other magnetic storage device, or can be used for carrying or storing in the form of an instruction or data structure.
- the desired program code and any other medium that can be accessed by the computer may suitably be a computer readable medium.
- any connection may suitably be a computer readable medium.
- coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technology such as infrared, radio, and microwave Station, server or other remote source transmission then coaxial cable, fiber optic cable, twisted pair,
- a disk and a disc include a compact disc (CD), a laser disc, a compact disc, a digital versatile disc (DVD), a floppy disc, and a Blu-ray disc, wherein the disc is usually magnetically copied, and the disc is The laser is used to optically replicate the data. Combinations of the above should also be included within the scope of the computer readable media.
Abstract
Description
Claims
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CN201380002537.5A CN105264997B (zh) | 2013-07-26 | 2013-07-26 | 一种数据传输的方法、设备与系统 |
JP2016528287A JP6216052B2 (ja) | 2013-07-26 | 2013-07-26 | データ送信方法、デバイスおよびシステム |
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CN107889261A (zh) * | 2016-09-30 | 2018-04-06 | 华为技术有限公司 | 通信方法、基站和终端设备 |
US10938546B2 (en) | 2016-09-30 | 2021-03-02 | Huawei Technologies Co., Ltd. | Communication method, base station, and terminal device |
CN107889261B (zh) * | 2016-09-30 | 2021-05-18 | 华为技术有限公司 | 通信方法、基站和终端设备 |
CN110140388A (zh) * | 2016-11-04 | 2019-08-16 | 瑞典爱立信有限公司 | 用不同tti得到所配置的输出功率的系统和方法 |
CN110140388B (zh) * | 2016-11-04 | 2022-08-19 | 瑞典爱立信有限公司 | 用不同tti得到所配置的输出功率的系统和方法 |
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BR112016001517B1 (pt) | 2022-10-18 |
EP3016467A4 (en) | 2016-06-01 |
CN105264997A (zh) | 2016-01-20 |
US20180160454A1 (en) | 2018-06-07 |
KR20160034994A (ko) | 2016-03-30 |
KR101783278B1 (ko) | 2017-09-29 |
EP3016467A1 (en) | 2016-05-04 |
US10791575B2 (en) | 2020-09-29 |
JP2016525837A (ja) | 2016-08-25 |
KR20170110176A (ko) | 2017-10-10 |
CN105264997B (zh) | 2019-10-22 |
US20160212769A1 (en) | 2016-07-21 |
JP6216052B2 (ja) | 2017-10-18 |
EP3016467B1 (en) | 2019-04-03 |
BR112016001517A2 (zh) | 2017-07-25 |
US9900912B2 (en) | 2018-02-20 |
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