CN103491622A - Uplink transmission method and device - Google Patents
Uplink transmission method and device Download PDFInfo
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- CN103491622A CN103491622A CN201210193309.8A CN201210193309A CN103491622A CN 103491622 A CN103491622 A CN 103491622A CN 201210193309 A CN201210193309 A CN 201210193309A CN 103491622 A CN103491622 A CN 103491622A
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Abstract
The embodiment of the invention discloses an uplink transmission method and device, and relates to the technical field of wireless communication. The uplink transmission method and device are used for achieving the aim of uplink synchronous transmission of terminal devices in a group in a group communication scheme, based on a main terminal device, in a MTC. In the uplink transmission method and device, the terminal devices in the group obtain uplink TA, accordingly, an uplink transmission time point is determined according to the obtained TA, and uplink transmission is carried out according to the determined time point. Therefore, the uplink transmission method and device achieve the aim of uplink synchronous transmission of the terminal devices in the group in the group communication scheme, based on the main terminal device, in the MTC.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of ascending transmission method and equipment.
Background technology
The network architecture of Long Term Evolution (LTE) system as shown in Figure 1.For the ease of carrying out of new business, the design that the LTE system has adopted user's face to separate with chain of command, chain of command signaling and user plane bearer are respectively by network element independently, and mobile management entity (Mobile Management Entity, MME) and gateway (S-GW) are responsible for.The major function of MME be the foundation of Non-Access Stratum (NAS) signaling, NAS signaling security, across the signaling of core net set up, follow-up service, roaming service, mandate and the bearer management etc. of terminal (UE) when idle (IDLE) pattern.S-GW is base station (eNB) the pass stomion in when switching, forwards the pass stomion of 2G/3G and other system business, completes buffering, some initial work of downstream packets, route and forwarding etc. are intercepted, wrapped in the interception of regulation.Packet data gateway (P-GW) is for the distribution of the interception of tactful execution, packet filtering, regulation, UE IP address, billing function, bag reproduction etc.
Control signal between UE, eNB and core net is processed by MME; User data is transferred to P-GW by S-GW, then by P-GW, is transferred to outside all kinds of Access Point Names (APN) node.Due to the coupling that has reduced control signal and user data, when only need network element that be responsible for user plane bearer be upgraded appears in new business, and can the control information transmission not impacted, thereby greatly reduced complexity and the device upgrade cost of network operation.
In the LTE system, the uplink synchronous process of UE as shown in Figure 2.
After terminal is initiated random access by message (Msg) 1, by the Timing Advance (TA) carried in descending feedback message, carry out uplink synchronous.Be terminal according to the TA value in msg2, adjust the time point of up transmission, and then reach uplink synchronous.
Machine type communication (Machine-type communication, MTC) as a kind of novel communication theory, its objective is the communication technology of number of different types is organically combined, as: machine is to machine communication, apparatus control communication, man-machine interaction communication, mobile interconnected communication, thus the development of promotion social production and life style.The business of future Human To Human communication may only account for 1/3 of whole terminal market, and the communication of larger quantity is the MTC communication service.Sometimes, MTC communication is called again machinery compartment (Machine-to-machine, M2M) communication or Internet of Things.
Current mobile communications network designs for interpersonal communication characteristics, as determining of: network capacity etc.If the characteristics that hope utilizes mobile communications network to support MTC to communicate by letter just need to communicate by letter according to MTC are optimized the mechanism of mobile communication system, in order to can in the situation that traditional person to person communication is not subject to or is subject to less the impact, realize better MTC communication.
The Some features that the current MTC communication of recognizing may exist has: MTC equipment has Hypomobility; The time that MTC equipment and network side carry out transfer of data is controlled; The transfer of data that MTC network and network side carry out is not high to requirement of real-time to transfer of data, has the time tolerance that is:; The MTC plant capacity is limited, requires extremely low power consumption; Only carry out the communication of small data quantity between MTC equipment and network side; MTC equipment can be take group and be managed as unit; Etc..
The MTC equipment of a reality can have above-mentioned one or more characteristics.
MTC equipment being take to group when unit manages, a kind of group communication scheme based on main equipment has been proposed, this scheme be mainly for position fix, flexible measurement (Smart Metering) business of service set.
As shown in Figure 3, be the group communication scheme based on main equipment.Equipment in group enters state of activation simultaneously, by main equipment, be responsible for initiating registration and IP address acquisition to network, other equipment in group are monitored the signaling between main equipment and network, thereby know interim UE sign and IP address, and adopt mode and the network of competition to carry out the business transmission.Carry out dispose procedure by main equipment and network interaction after the business end of transmission, in group, equipment enters deactivation status.Choosing of main equipment in this scheme can be pre-configured, can be also to adopt certain algorithm to determine.
To sum up, in the group communication scheme based on main equipment, only have main equipment to carry out link setup with network under the state that activates (active), other equipment in group are just monitored the configuration information of distributing to master terminal, and according to the network scheduling reported data.In the group, terminal is not carried out the uplink synchronous process during this time, even the resource that is to say network allocation, the up transmission of these terminals is also step-out.In the situation that step-out, the upstream data that terminal is sent is decoded mistake possibly, can not correctly be received by base station.
Summary of the invention
The embodiment of the present invention provides a kind of ascending transmission method and equipment, in the group communication scheme based on MTU that solves MTC, and the problem how terminal equipment in group carries out the uplink synchronous transmission.
Ascending transmission method in a kind of machine type communication MTC, be applied in the group communication scheme based on MTU, and the method comprises:
Each terminal equipment in group obtains uplink timing advance TA;
Each terminal equipment in group is determined the time point of uplink according to the up TA got, and carries out uplink according to definite time point.
Uplink synchronisation method in a kind of MTC, be applied in the group communication scheme based on MTU, and the method comprises:
After base station receives the random access procedure of the terminal equipment initiation in group, determine the up TA of this terminal equipment;
Base station sends to described terminal equipment by described up TA.
A kind of terminal equipment, be applied in the group communication scheme based on MTU, and this terminal equipment comprises:
Acquiring unit, for obtaining uplink timing advance TA;
Transmission unit, determine the time point of uplink for the up TA according to getting, and carry out uplink according to definite time point.
A kind of base station, be applied in the group communication scheme based on MTU, and this base station comprises:
Receiving element, the random access procedure of initiating for the terminal equipment received in group;
Determining unit, for determining the up TA of this terminal equipment;
Transmitting element, for sending to described terminal equipment by described up TA.
In this programme, in the scheme that the embodiment of the present invention provides, each terminal equipment in group obtains up TA, thereby determines the time point of uplink according to the up TA got, and carries out uplink according to definite time point.Each terminal equipment in visible this programme in group can be realized the uplink synchronous transmission according to up TA, thereby has solved in the group communication scheme based on MTU in MTC the problem how terminal equipment in group carries out the uplink synchronous transmission.
The accompanying drawing explanation
Fig. 1 is LTE SNA schematic diagram in prior art;
Fig. 2 is uplink synchronous process schematic diagram in prior art;
Fig. 3 is group communication scheme schematic diagram in prior art;
The method flow schematic diagram that Fig. 4 provides for the embodiment of the present invention;
The other method schematic flow sheet that Fig. 5 provides for the embodiment of the present invention;
The schematic flow sheet that Fig. 6 a is the embodiment of the present invention one;
The schematic flow sheet that Fig. 6 b is the embodiment of the present invention four;
The schematic flow sheet that Fig. 6 c is the embodiment of the present invention five;
The schematic flow sheet that Fig. 6 d is the embodiment of the present invention six;
The apparatus structure schematic diagram that Fig. 7 provides for the embodiment of the present invention;
Another apparatus structure schematic diagram that Fig. 8 provides for the embodiment of the present invention.
Embodiment
In order to solve in the group communication scheme based on MTU in MTC, the problem how terminal equipment in group carries out the uplink synchronous transmission, the embodiment of the present invention provides the ascending transmission method in a kind of MTC.
Referring to Fig. 4, the ascending transmission method in the MTC that the embodiment of the present invention provides comprises the following steps:
Step 40: each terminal equipment in group obtains uplink timing advance (TA);
Step 41: each terminal equipment in group is determined the time point of uplink according to the up TA got, and carries out uplink according to definite time point.
In step 40, each terminal equipment in group obtains up TA, specifically comprises one of following four kinds of methods:
Method one: the MTU in group, to the base station initiating random access procedure, receives the up TA that base station is returned; And the other-end equipment in group receives the described up TA that base station sends; Perhaps,
Method two: each terminal equipment in group obtains pre-stored up TA, and described up TA goes out according to the range estimation of corresponding terminal equipment and base station; Perhaps,
Method three: each terminal equipment in group to the base station initiating random access procedure, receives and preserves the up TA that base station is returned in carrying out the registration attaching process, obtains the up TA of preservation; Perhaps,
Method four: each terminal equipment in group receives the uplink scheduling signaling of the dedicated preamble of carrying distribution of base station transmission; According to the dedicated preamble initiating random access procedure received, and receive the up TA that base station is returned.
Further, for the UMTS system, adopting described method for the moment, after receiving at MTU the up TA returned base station, this up TA is sent to radio network controller (RNC), so that RNC sends to the other-end equipment in group by base station by this up TA.
Further, when adopting described method two, when terminal equipment gets a plurality of up TA, determine the community of current access, choose up TA corresponding to this community from a plurality of up TA got.
Further, when adopting described method three, each terminal equipment in group receives the uplink scheduling signaling of the dedicated preamble of carrying distribution of base station transmission, and specific implementation can be as follows:
Each terminal equipment in group, after the configuration information of the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI) that receives the network side transmission and all wireless links, receives base station by the uplink scheduling signaling of the dedicated preamble of carrying distribution of the physical downlink control channel PDCCH transmission of this C-RNTI scrambling.
Further, each terminal equipment in group can be monitored TAC order or the SS order that network side sends, according to the TA adjustment amount information of carrying in timing advance adjustment order (TAC) order listened to or simultaneous bias adjustment order (SS) order, adjust up TA; Perhaps,
Each terminal equipment in group, according to descending timing offset, is adjusted the time point of up TA or uplink.
Further, each terminal equipment in group can obtain the mobile attribute information of storage, if the terminal equipment in mobile attribute information indication group maintains static, adopts described method two or method three; If the terminal equipment mass motion in mobile attribute information indication group, adopt described method one; If the terminal equipment in mobile attribute information indication group, in mobile state, adopts described method four.
Further, each terminal equipment in group is in the process of access network, and the mobile attribute information that self is stored reports base station.
Referring to Fig. 5, the uplink synchronisation method in the MTC that the embodiment of the present invention provides comprises the following steps:
Step 50: after base station receives the random access procedure of the terminal equipment initiation in group, determine the up TA of this terminal equipment;
Step 51: base station sends to described terminal equipment by described up TA.
Further, at terminal equipment, during for the MTU in group, base station, after described up TA is sent to MTU, sends to by described up TA the interior other-end equipment of organizing.
Further, for the LTE system, base station sends to the other-end equipment in group by described up TA, and specific implementation can be as follows:
Base station is after MTU and network side establish a communications link, after carrying out data receiver by the other-end equipment in Physical Downlink Control Channel (PDCCH) dispatch group of group Radio Network Temporary Identifier (G-RNTI) scrambling, this up TA and the C-RNTI joined for this component are together sent to the other-end equipment in group; Perhaps,
Base station is after MTU and network side establish a communications link, and after carrying out data receiver by the other-end equipment in the PDCCH dispatch group of G-RNTI scrambling, the C-RNTI that this component is joined sends to the other-end equipment in group; After carrying out data receiver by the other-end equipment in the PDCCH dispatch group of C-RNTI scrambling, the RRC that carries this up TA is connected to reconfiguration message and send to the other-end equipment in group.
Further, for the UMTS system, base station sends to the other-end equipment in group by this up TA, and specific implementation can be as follows:
Base station, after MTU and network side establish a communications link, receives the group that comprises this up TA that RNC sends and connects and sets up Indication message;
Base station sends to the other-end equipment in group by this up TA by high-speed downstream Physical Shared Channel (HS-PDSCH) after carrying out data receiver by the other-end equipment in shared control channel (HS-SCCH) dispatch group of the high speed descending sharing channel of G-RNTI scrambling.
Further, before the random access procedure that the terminal equipment in base station receives group is initiated, base station sends the uplink scheduling signaling of the dedicated preamble of carrying distribution to the terminal equipment in group; Accordingly, base station receives the random access procedure that the terminal equipment in group is initiated, and is specifically as follows: base station receives the random access procedure that described terminal equipment is used described dedicated preamble to initiate.
Further, base station sends the uplink scheduling signaling of the dedicated preamble of carrying distribution to the terminal equipment in group, be specifically as follows: after the terminal equipment of base station in the configuration information by C-RNTI and all wireless links sends to group, send the uplink scheduling signaling of the dedicated preamble of carrying distribution to this terminal equipment.
Concrete, base station sends to the other-end equipment in group by up TA, and specific implementation can be as follows:
The mobile attribute information that base station reports in the process of access network according to the mobile terminal in group, determine that this moves the terminal equipment mass motion in whether indication group of attribute information, when being defined as being, described up TA sent to the other-end equipment in group.
Concrete, base station sends the uplink scheduling signaling of the dedicated preamble of carrying distribution to the terminal equipment in group, and specific implementation can be as follows:
The mobile attribute information that base station reports in the process of access network according to the mobile terminal in group, determine
This moves the interior terminal equipment of whether indication group of attribute information in mobile state, and when being defined as being, to group, interior terminal equipment sends the uplink scheduling signaling of the dedicated preamble of carrying distribution.
Below in conjunction with specific embodiment, the present invention will be described:
Problem in conjunction with described existing relevant programme exists above, the present invention is directed to the relatively-stationary one group of MTC terminal in position, proposes several uplink synchronous solutions.
Method one: core concept is the situation of finite region that concentrates on for the position of the terminal equipment in group, can use the up TA of the up TA of MTU as each terminal equipment in group.
Particularly, for terminal equipment side:
MTU in group, to the base station initiating random access procedure, receives the up TA that base station is returned, and determines the time point of uplink according to this up TA, and carries out uplink according to definite time point; And the other-end equipment in group receives this up TA that base station sends, and determines the time point of uplink according to this up TA, and carries out uplink according to definite time point.
For the LTE system, MTU carrys out initiating random access procedure by send leading (preamble) code to base station; For the UMTS system, MTU carrys out initiating random access procedure by send uplink synchronous code (SYNC UL) to base station;
Each terminal equipment in group need to be monitored TAC order or the SS order that network side sends, and according to the TA adjustment amount information of carrying in the TAC order listened to or SS order, adjusts up TA; Perhaps, each terminal equipment in group, according to descending timing offset, is adjusted the time point of up TA or uplink.
For the UMTS system, after receiving at MTU the up TA returned base station, need that this up TA is controlled to (RRC) signaling by Radio Resource and send to RNC, RNC sends to base station by this up TA, and base station sends to this up TA the other-end equipment in group again.RNC specifically can send to base station by this up TA when Iub mouth foundation group connects.
For network side:
Base station is determined the up TA of MTU, and this up TA is sent to MTU after receiving the random access procedure of the MTU initiation in group; And base station sends to the other-end equipment in group by this up TA.
For the LTE system, base station sends to the method for other-end equipment in group to be the up TA of MTU: base station is after MTU and network side establish a communications link, after carrying out data receiver by the other-end equipment in the PDCCH dispatch group of G-RNTI scrambling, by shared channel, this up TA is together sent to the other-end equipment in group with the relevant configuration information such as C-RNTI of joining for this component; Perhaps,
Base station is after MTU and network side establish a communications link, after carrying out data receiver by the other-end equipment in the PDCCH dispatch group of G-RNTI scrambling, by shared channel, will send to for the relevant configuration information such as C-RNTI that this component is joined the other-end equipment in group; After carrying out data receiver by the other-end equipment in the PDCCH dispatch group of C-RNTI scrambling, the RRC that carries this up TA is connected to reconfiguration message and send to the other-end equipment in group.
For the UMTS system, base station sends to the method for other-end equipment in group to be the up TA of MTU: base station, after MTU and network side establish a communications link, receives the group that comprises this up TA connection that RNC sends when Iub mouth foundation group connects and sets up Indication message; After data receiver is carried out by the other-end equipment in the HS-SCCH dispatch group of G-RNTI scrambling in base station, this up TA is sent to the other-end equipment in group by HS-PDSCH.
The method is applicable to LTE and UMTS system.
Method two: core concept is for the fixing situation in position of terminal equipment in group, can be when each terminal equipment be installed according to the range estimation TA of terminal equipment and base station, and be stored in terminal equipment, as the up TA of this terminal equipment.
Particularly, for terminal equipment side:
Terminal equipment in group obtains pre-stored up TA, determines the time point of uplink according to the up TA obtained, and carries out uplink according to definite time point.
When terminal equipment gets a plurality of up TA, terminal equipment is determined the community of current access, chooses up TA corresponding to this community from a plurality of up TA got, and determines the time point of uplink according to the up TA chosen.
The method is applicable to LTE and UMTS system.
Method three: for the terminal equipment in group, move hardly or mobile situation in very little scope just, adopt the TA that uses while adhering to for the first time (attach) network as after the TA that uses while sending upstream data.
Particularly, for terminal equipment side:
Each terminal equipment in group, after community is selected in start, to the base station initiating random access procedure, receives the up TA that base station is returned, and preserves this up TA in the attaching process of carrying out registration; Follow-up terminal equipment is determined the time point of uplink according to the up TA preserved, and carries out uplink according to definite time point.
Each terminal equipment in group need to be monitored TAC order or the SS order that network side sends, and according to the TA adjustment amount information of carrying in the TAC order listened to or SS order, adjusts up TA; Perhaps, each terminal equipment in group, according to descending timing offset, is adjusted the time point of up TA or uplink.
The method is applicable to LTE and UMTS system.
Method four: in the LTE system, in order to allow terminal carry out uplink synchronous, during the terminal equipment of network side in dispatch group, be that this terminal equipment distributes the dedicated preamble code, use this use preamble code initiating random access procedure to trigger this terminal equipment, and then obtain up TA.
Particularly, for terminal equipment side:
Terminal equipment in group receives the uplink scheduling signaling of the dedicated preamble code that carries distribution of base station transmission; Terminal equipment is used the dedicated preamble code initiating random access procedure received, and receives the up TA that base station is returned, and determines the time point of uplink according to the up TA received, and carries out uplink according to definite time point.
Terminal equipment in group can be monitored PDCCH after the configuration information of the C-RNTI that receives the network side transmission and all wireless links, receives base station by the uplink scheduling signaling of the dedicated preamble code that carries distribution of the PDCCH transmission of this C-RNTI scrambling.
Terminal equipment in group can be after receiving the uplink scheduling signaling in official hour (10ms usually), initiating random access procedure.
For network side:
Base station sends the uplink scheduling signaling of the dedicated preamble code that carries distribution to the terminal equipment in group; The random access procedure that the base station receiving terminal apparatus is used this dedicated preamble code to initiate, determine the up TA of this terminal equipment, and this up TA returned to terminal equipment.
After base station can send at the configuration information by C-RNTI and all wireless links the terminal equipment in group, send the uplink scheduling signaling of the dedicated preamble code that carries distribution to terminal equipment.
After the uplink of current terminal equipment, the next terminal equipment of scheduling is continued in base station, until all terminal equipments in group all obtain up TA.
The method is applicable to the LTE system.
Method five: the mobile attribute of default terminal equipment, terminal equipment is determined and is used which kind of mode to obtain up TA according to the mobile attribute of self.
Particularly, when installing terminal equipment, it is set and moves attribute, which kind of mode terminal equipment, according to the mobile attribute of self, determines to adopt obtain up TA.
If it moves attribute is to maintain static, can adopt method two or method three to obtain TA; If it moves attribute is group member's mass motion, can take method one; If it moves attribute is mobile, adopt method four.
Based on method one and method four, whether whether in order to allow network side know, need the up TA of MTU to be sent to other-end equipment or need for each terminal equipment distributes special-purpose preamble code, MTU can report base station by the mobile attribute of terminal equipment in group.
The method is applicable to LTE system and UMTS system.
Embodiment mono-(corresponding method one):
Take the LTE system as example, and in following group communication flow process, base station can be carried at the TA of MTU in one of two message in the dotted line circle other-end equipment in group of issuing.Carry TA along with the distribution of C-RNTI or along with the RRC reconfiguration message is issued terminal equipment together simultaneously.Terminal equipment is preserved and is used in follow-up up transmission.This TA value can be adjusted and be revised according to the variable quantity of descending timing, also can be adjusted according to the TAC order of network.This mode can be for the MTC equipment group in finite region, as steamer, automobile etc.
As shown in Figure 6 a, idiographic flow is as follows:
One group of MTC equipment, started shooting simultaneously and enter state of activation according to the default time.By main MTC equipment (the Master MTC device) initiating random access procedure in group, obtain the up TA that base station is returned; And set up RRC and connect.
After the RRC connection setup complete message is received in base station, communicate by letter to set up group with MME and be connected.
Base station is used the PDCCH of G-RNTI scrambling to be sent as to all MTC equipment in organizing C-RNTI and the Signaling Radio Bearer (SRB) 1 that this component is joined receiving that group that MME sends connects after setting up message, wherein can carry up TA information.After notice, use this C-RNTI to send RRC and connect reconfiguration message, wherein carry service bearer and enciphered message, also can carry up TA information.After main MTC equipment receives RRC connection reconfiguration message, transmission RRC has reshuffled message, and all MTC equipment in the representative group have all been received this configuration information.
Afterwards, network side is the MTC equipment in dispatch group one by one in a certain order, is its Resources allocation and receives the data that report.The up TA received before using when the MTC equipment in group sends upstream data determines up delivery time.
After in group, the data of all MTC equipment are sent completely, base station discharges RRC and connects and organize connection, and main MTC equipment returns to the RRC Release complete.After receiving the RRC connection release message, all MTC equipment enters unactivated state.
Embodiment bis-(corresponding method two):
The fixing terminal equipment for position, take intelligent electric meter as example.During for the user installation intelligent electric meter, according to the range estimation TA of base station and intelligent electric meter installation site, distance is multiplied by 2 again divided by the light velocity, just can obtain the TA value.This TA value of storage in intelligent electric meter, as the Timing Advance of up transmission.For the ease of operation, user that can the Yi Dong building is by a TA value, and each intelligent electric meter can carry out the adjustment of TA by monitoring TAC order in the communicating by letter of follow-up and network, and the TA value after the preservation renewal.The method is all available for LTE system and UMTS system.
Embodiment tri-(corresponding method three):
The relatively fixing or very little situation of moving range for the position of terminal equipment.Terminal equipment, when starting shooting for the first time, can be carried out registration process.The initiating random access procedure of terminal meeting during this time, as passed through to send preamble code initiating random access procedure in the LTE system, pass through to send SYNC UL initiating random access procedure in the UMTS system.Network side returns to accidental access response, as returned to accidental access response (RAR) in the LTE system, in the UMTS system, feeds back FPACH, wherein all can carry the information of up TA.After receiving, terminal preserves this up TA, for follow-up up transmission.
Embodiment tetra-(corresponding method four):
In the group communication process, base station wants each the MTC equipment in the sequential scheduling group to carry out uplink.Before distributing to the terminal ascending resource, base station is the MTC devices allocation dedicated preamble code for being scheduled first, to trigger this MTC equipment, carries out special-purpose random access procedure as shown in Figure 6 b.Network side provides up TA information and follow-up resource information in RAR message.
As shown in Figure 6 b, idiographic flow is as follows:
One group of MTC equipment, started shooting simultaneously and enter state of activation according to the default time.Main MTC equipment (Master MTC device) initiating random access procedure by group, obtain up TA; And set up RRC and connect.
After the RRC connection setup complete message is received in base station, communicate by letter to set up group with MME and be connected.
Base station is used the PDCCH of G-RNTI scrambling to be sent as to all MTC equipment in organizing C-RNTI and the SRB1 that this component is joined receiving that group that MME sends connects after setting up message.After notice, use this C-RNTI dispatching downlink resource concurrence to send RRC to connect reconfiguration message, wherein carry service bearer and enciphered message.After main MTC equipment receives RRC connection reconfiguration message, transmission RRC has reshuffled message, and all MTC equipment in the representative group have all been received this configuration information.
Afterwards, network side is the MTC equipment in dispatch group one by one in a certain order, the MTC equipment be scheduled is by sending special-purpose preamble code initiating random access procedure, network side feeding back uplink TA is also its Resources allocation, MTC equipment is used the up TA of network side feedback to determine up delivery time, the concurrent upstream data that send.When the complete data of this MTC device transmission, next MTC equipment of base station scheduling, this MTC equipment repeats said process.
After in group, the data of all MTC equipment are sent completely, base station discharges RRC and connects and organize connection, and main MTC equipment returns to the RRC Release complete.After receiving the RRC connection release message, all MTC equipment enters unactivated state.
Embodiment five (corresponding method five):
Main MTC equipment reports the mobile attribute information of oneself in access network, such as whether needing network allocation dedicated preamble code to trigger the indication of special-purpose random access procedure, and/or whether need to broadcast the TA of main MTC equipment to other all MTC equipment in group.Whether the information that base station reports according to main MTC equipment determines whether to need the TA that sends main MTC equipment to other MTC equipment, need for the special-purpose random access procedure of each MTC device trigger.
As shown in Fig. 6 c, idiographic flow is as follows:
One group of MTC equipment, started shooting simultaneously and enter state of activation according to the default time.Main MTC equipment (Master MTC device) initiating random access procedure by group, obtain up TA; And set up RRC and connect.Wherein main MTC equipment reports the mobile attribute information of MTC equipment in group, such as not moving, needs/do not need to carry master terminal TA, need/does not need special-purpose random process to obtain the information such as TA.
After the RRC connection setup complete message is received in base station, communicate by letter to set up group with MME and be connected.
Base station, after receiving that group that MME sends connects and sets up message, is used the PDCCH of G-RNTI scrambling to be sent as to all MTC equipment in organizing C-RNTI and the SRB1 that this component is joined.After notice, use this C-RNTI dispatching downlink resource concurrence to send RRC to connect reconfiguration message, wherein carry service bearer and enciphered message.Base station determines whether carrying in the meantime the up TA of main MTC equipment to other all MTC equipment in group according to the mobile attribute information of terminal to report.After main MTC equipment receives RRC connection reconfiguration message, transmission RRC has reshuffled message, and all MTC equipment in the representative group have all been received this configuration information.
Afterwards, base station is the MTC equipment in dispatch group one by one in a certain order, and the mobile attribute information that base station reports according to MTC equipment determines whether will being each MTC devices allocation dedicated preamble code.If necessary, to the MTC equipment be scheduled, send the dedicated preamble code, network side feeding back uplink TA is also its Resources allocation, and terminal is used the up TA of network side feedback to determine up delivery time, the concurrent upstream data that send.Otherwise, directly dispatch MTC equipment, distribute the resource that sends data.When the complete data of this MTC device transmission, next MTC equipment of base station scheduling, this MTC equipment repeats said process.
After in group, the data of all MTC equipment are sent completely, base station discharges RRC and connects and organize connection, and main MTC equipment returns to the RRC Release complete.After receiving the RRC connection release message, all MTC equipment enters unactivated state.
Embodiment six:
Be similar to embodiment 1, the present embodiment has provided the flow chart of employing method one in the UMTS system.Base station, when the MTC device broadcasts configuration information in group, issues the TA of main MTC equipment simultaneously.After MTC equipment in group receives this TA, adopt this TA as up transmission lead.
In the UMTS system, in main MTC equipment initial access process, TA is that base station produces, and still main MTC equipment can't be notified the information of group access to base station, can cause base station not know whether preserve TA.So, in the UMTS system, the TA information exchange of main MTC equipment is crossed RRC and has been set up message and issue RNC.Set up Indication message by RNC by the group connection of Iub interface again and carry TA to base station.Issue other MTC equipment in group by base station by shared channel.
As shown in Fig. 6 d, idiographic flow is as follows:
One group of MTC equipment, started shooting simultaneously and enter state of activation according to the default time.Main MTC equipment (Master MTC device) initiating random access procedure by group, obtain up TA, and set up the RRC connection.Wherein, carry up TA in the RRC connection setup complete message.
RNC is after receiving the RRC connection setup complete message, and on the Iu mouth, the foundation group connects, and on the Iub mouth, foundation group simultaneously connects, and in this process, also the up TA of main MTC equipment is handed down to base station.
Base station is used the HS-SCCH of G-RNTI scrambling to carry out the resource distribution.E-RNTI corresponding to group member, the configuration informations such as H-RNTI, SRB are notified in base station on corresponding HS-PDSCH, also the up TA of main MTC equipment are sent to the MTC equipment in group simultaneously.
After correctly receiving these information, main MTC equipment feedback radio bearer (RB) has been set up message.In follow-up process, the MTC equipment in group is used received up TA to determine up delivery time.
Referring to Fig. 7, the embodiment of the present invention provides a kind of terminal equipment, is applied in the group communication scheme based on MTU, and this terminal equipment comprises:
Acquiring unit 70, for obtaining uplink timing advance TA;
Further, described acquiring unit 70 for: adopt one of following four kinds of methods to obtain up TA:
Method one: if this terminal equipment, for the MTU in group, to the base station initiating random access procedure, receives the up TA that base station is returned; If this terminal equipment is not the MTU in group, receive the described up TA that base station sends;
Method two: obtain pre-stored up TA, described up TA goes out according to the range estimation of corresponding terminal equipment and base station;
Method three: to the base station initiating random access procedure, receive and preserve the up TA that base station is returned in carrying out the registration attaching process, obtain the up TA of preservation;
Method four: the uplink scheduling signaling that receives the dedicated preamble of carrying distribution of base station transmission; According to the dedicated preamble initiating random access procedure received, and receive the up TA that base station is returned.
Further, described acquiring unit 70 also for:
For the UMTS system, adopting described method for the moment, if this terminal equipment is the MTU in group, after receiving the up TA returned base station, this up TA is sent to radio network controller (RNC), so that RNC sends to the other-end equipment in group by base station by this up TA.
Further, described acquiring unit 70 for:
When adopting described method two, when getting a plurality of up TA, determine the community of current access, choose up TA corresponding to this community from a plurality of up TA got.
Further, described acquiring unit 70 for:
When adopting described method three, after the configuration information of the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI that receives the network side transmission and all wireless links, receive base station by the uplink scheduling signaling of the dedicated preamble of carrying distribution of the physical downlink control channel PDCCH transmission of this C-RNTI scrambling.
Further, this terminal equipment also comprises:
According to descending timing offset, adjust the time point of up TA or uplink.
Further, described acquiring unit 70 also for:
Obtain the mobile attribute information of storage, if the terminal equipment in mobile attribute information indication group maintains static, adopt described method two or method three; If the terminal equipment mass motion in mobile attribute information indication group, adopt described method one; If the terminal equipment in mobile attribute information indication group, in mobile state, adopts described method four.
Further, this terminal equipment also comprises:
Referring to Fig. 8, the embodiment of the present invention provides a kind of base station, is applied in the group communication scheme based on MTU, and this base station comprises:
Receiving element 80, the random access procedure of initiating for the terminal equipment received in group;
Determining unit 81, for determining the up TA of this terminal equipment;
Transmitting element 82, for sending to described terminal equipment by described up TA.
Further, this base station also comprises:
Indicating member 83, during for the MTU in described terminal equipment is group, after described up TA is sent to MTU, send to the other-end equipment in group by described up TA.
Further, described indicating member 83 for:
For the LTE system, after MTU and network side establish a communications link, after carrying out data receiver by the other-end equipment in the PDCCH dispatch group of G-RNTI scrambling, this up TA and the C-RNTI joined for this component are together sent to the other-end equipment in group; Perhaps,
After MTU and network side establish a communications link, after carrying out data receiver by the other-end equipment in the PDCCH dispatch group of G-RNTI scrambling, the C-RNTI that this component is joined sends to the other-end equipment in group; After carrying out data receiver by the other-end equipment in the PDCCH dispatch group of C-RNTI scrambling, the RRC that carries this up TA is connected to reconfiguration message and send to the other-end equipment in group.
Further, described indicating member 83 for:
For the UMTS system, after MTU and network side establish a communications link, receive the group that comprises this up TA that RNC sends and connect and sets up Indication message;
After carrying out data receiver by the other-end equipment in the HS-SCCH dispatch group of G-RNTI scrambling, this up TA is sent to the other-end equipment in group by HS-PDSCH.
Further, this base station also comprises:
Described receiving element 80 for:
Receive the random access procedure that described terminal equipment is used described dedicated preamble to initiate.
Further, described trigger element 84 for:
After terminal equipment in the configuration information by C-RNTI and all wireless links sends to group, send the uplink scheduling signaling of the dedicated preamble of carrying distribution to this terminal equipment.
Further, described indicating member 83 also for:
The mobile attribute information reported in the process of access network according to the mobile terminal in group, determine that this moves the terminal equipment mass motion in whether indication group of attribute information, when being defined as being, described up TA sent to the other-end equipment in group.
Further, described trigger element 84 for:
The mobile attribute information reported in the process of access network according to the mobile terminal in group, determine that this moves the interior terminal equipment of whether indication group of attribute information in mobile state, when being defined as being, to group, interior terminal equipment sends the uplink scheduling signaling of the dedicated preamble of carrying distribution.
To sum up, beneficial effect of the present invention comprises:
In the scheme that the embodiment of the present invention provides, each terminal equipment in group obtains up TA, thereby determines the time point of uplink according to the up TA got, and carries out uplink according to definite time point.Each terminal equipment in visible this programme in group can be realized the uplink synchronous transmission according to up TA, thereby has solved in the group communication scheme based on MTU in MTC the problem how terminal equipment in group carries out the uplink synchronous transmission.
The invention provides several methods that allow the interior terminal equipment of group obtain up TA, make the up transmitting time of all terminal equipments in group substantially can guarantee that the time of upstream data arrival network side is in the scope allowed at network, to improve the correct receptance of the up transmission of terminal, avoid retransmitting the wasting of resources caused.
The present invention describes with reference to flow chart and/or the block diagram of method, equipment (system) and computer program according to the embodiment of the present invention.Should understand can be in computer program instructions realization flow figure and/or block diagram each flow process and/or the flow process in square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce for realizing the device in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction be stored in this computer-readable memory produce the manufacture that comprises command device, this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make and carry out the sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out on computer or other programmable devices is provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (32)
1. the ascending transmission method in a machine type communication MTC, be applied to, in the group communication scheme based on MTU, it is characterized in that, the method comprises:
Each terminal equipment in group obtains uplink timing advance TA;
Each terminal equipment in group is determined the time point of uplink according to the up TA got, and carries out uplink according to definite time point.
2. the method for claim 1, is characterized in that, described group of each interior terminal equipment obtains up TA, specifically comprises one of following four kinds of methods:
Method one: the MTU in group, to the base station initiating random access procedure, receives the up TA that base station is returned; And the other-end equipment in group receives the described up TA that base station sends; Perhaps,
Method two: each terminal equipment in group obtains pre-stored up TA, and described up TA goes out according to the range estimation of corresponding terminal equipment and base station; Perhaps,
Method three: each terminal equipment in group to the base station initiating random access procedure, receives and preserves the up TA that base station is returned in carrying out the registration attaching process, obtains the up TA of preservation; Perhaps,
Method four: each terminal equipment in group receives the uplink scheduling signaling of the dedicated preamble of carrying distribution of base station transmission; According to the dedicated preamble initiating random access procedure received, and receive the up TA that base station is returned.
3. method as claimed in claim 2, is characterized in that, for the UMTS system, adopting described method for the moment, further comprises:
After receiving at MTU the up TA returned base station, this up TA is sent to radio network controller (RNC), so that RNC sends to the other-end equipment in group by base station by this up TA.
4. method as claimed in claim 2, is characterized in that, when adopting described method two, further comprises:
When terminal equipment gets a plurality of up TA, determine the community of current access, choose up TA corresponding to this community from a plurality of up TA got.
5. method as claimed in claim 2, is characterized in that, when adopting described method three, described group of each interior terminal equipment receives the uplink scheduling signaling of the dedicated preamble of carrying distribution of base station transmission, specifically comprises:
Each terminal equipment in group, after the configuration information of the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI that receives the network side transmission and all wireless links, receives base station by the uplink scheduling signaling of the dedicated preamble of carrying distribution of the physical downlink control channel PDCCH transmission of this C-RNTI scrambling.
6. as arbitrary described method in claim 1-5, it is characterized in that, further comprise:
Each terminal equipment in group is monitored TAC order or the SS order that network side sends, and according to the TA adjustment amount information of carrying in the TAC order listened to or SS order, adjusts up TA; Perhaps,
Each terminal equipment in group, according to descending timing offset, is adjusted the time point of up TA or uplink.
7. as arbitrary described method in claim 2-5, it is characterized in that, further comprise:
Each terminal equipment in group obtains the mobile attribute information of storage, if the terminal equipment in mobile attribute information indication group maintains static, adopts described method two or method three; If the terminal equipment mass motion in mobile attribute information indication group, adopt described method one; If the terminal equipment in mobile attribute information indication group, in mobile state, adopts described method four.
8. as arbitrary described method in claim 2-5, it is characterized in that, further comprise:
Each terminal equipment in group is in the process of access network, and the mobile attribute information that self is stored reports base station.
9. the uplink synchronisation method in a MTC, be applied to, in the group communication scheme based on MTU, it is characterized in that, the method comprises:
After base station receives the random access procedure of the terminal equipment initiation in group, determine the up TA of this terminal equipment;
Base station sends to described terminal equipment by described up TA.
10. method as claimed in claim 9, is characterized in that, described terminal equipment for the group in MTU the time, further comprise:
Base station, after described up TA is sent to MTU, sends to the other-end equipment in group by described up TA.
11. method as claimed in claim 10, is characterized in that, for the LTE system, described base station sends to the other-end equipment in group by described up TA, specifically comprises:
Base station, after MTU and network side establish a communications link, after carrying out data receiver by the other-end equipment in the PDCCH dispatch group of G-RNTI scrambling, together sends to the interior other-end equipment of group by this up TA and the C-RNTI joined for this component; Perhaps,
Base station is after MTU and network side establish a communications link, and after carrying out data receiver by the other-end equipment in the PDCCH dispatch group of G-RNTI scrambling, the C-RNTI that this component is joined sends to the other-end equipment in group; After carrying out data receiver by the other-end equipment in the PDCCH dispatch group of C-RNTI scrambling, the RRC that carries this up TA is connected to reconfiguration message and send to the other-end equipment in group.
12. method as claimed in claim 10, is characterized in that, for the UMTS system, described base station sends to the other-end equipment in group by this up TA, specifically comprises:
Base station, after MTU and network side establish a communications link, receives the group that comprises this up TA that RNC sends and connects and sets up Indication message;
After data receiver is carried out by the other-end equipment in the HS-SCCH dispatch group of G-RNTI scrambling in base station, this up TA is sent to the other-end equipment in group by HS-PDSCH.
13. method as claimed in claim 9, is characterized in that, before the random access procedure that the terminal equipment in base station receives group is initiated, further comprises:
Base station sends the uplink scheduling signaling of the dedicated preamble of carrying distribution to the terminal equipment in group;
Described base station receives the random access procedure that the terminal equipment in group is initiated, and specifically comprises:
Base station receives the random access procedure that described terminal equipment is used described dedicated preamble to initiate.
14. method as claimed in claim 13, is characterized in that, described base station sends the uplink scheduling signaling of the dedicated preamble of carrying distribution to the terminal equipment in group, specifically comprise:
After the terminal equipment of base station in the configuration information by C-RNTI and all wireless links sends to group, send the uplink scheduling signaling of the dedicated preamble of carrying distribution to this terminal equipment.
15. as arbitrary described method in claim 10-12, it is characterized in that, described by described up TA send to the group in other-end equipment, specifically comprise:
The mobile attribute information that base station reports in the process of access network according to the mobile terminal in group, determine that this moves the terminal equipment mass motion in whether indication group of attribute information, when being defined as being, described up TA sent to the other-end equipment in group.
16. as arbitrary described method in claim 13-14, it is characterized in that, described base station sends the uplink scheduling signaling of the dedicated preamble of carrying distribution to the terminal equipment in group, specifically comprise:
The mobile attribute information that base station reports in the process of access network according to the mobile terminal in group, determine that this moves the interior terminal equipment of whether indication group of attribute information in mobile state, when being defined as being, to group, interior terminal equipment sends the uplink scheduling signaling of the dedicated preamble of carrying distribution.
17. a terminal equipment, be applied to, in the group communication scheme based on MTU, it is characterized in that, this terminal equipment comprises:
Acquiring unit, for obtaining uplink timing advance TA;
Transmission unit, determine the time point of uplink for the up TA according to getting, and carry out uplink according to definite time point.
18. terminal equipment as claimed in claim 17, is characterized in that, described acquiring unit is used for: adopt one of following four kinds of methods to obtain up TA:
Method one: if this terminal equipment, for the MTU in group, to the base station initiating random access procedure, receives the up TA that base station is returned; If this terminal equipment is not the MTU in group, receive the described up TA that base station sends;
Method two: obtain pre-stored up TA, described up TA goes out according to the range estimation of corresponding terminal equipment and base station;
Method three: to the base station initiating random access procedure, receive and preserve the up TA that base station is returned in carrying out the registration attaching process, obtain the up TA of preservation;
Method four: the uplink scheduling signaling that receives the dedicated preamble of carrying distribution of base station transmission; According to the dedicated preamble initiating random access procedure received, and receive the up TA that base station is returned.
19. terminal equipment as claimed in claim 18, is characterized in that, described acquiring unit also for:
For the UMTS system, adopting described method for the moment, if this terminal equipment is the MTU in group, after receiving the up TA returned base station, this up TA is sent to radio network controller (RNC), so that RNC sends to the other-end equipment in group by base station by this up TA.
20. terminal equipment as claimed in claim 18, is characterized in that, described acquiring unit is used for:
When adopting described method two, when getting a plurality of up TA, determine the community of current access, choose up TA corresponding to this community from a plurality of up TA got.
21. terminal equipment as claimed in claim 18, is characterized in that, described acquiring unit is used for:
When adopting described method three, after the configuration information of the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI that receives the network side transmission and all wireless links, receive base station by the uplink scheduling signaling of the dedicated preamble of carrying distribution of the physical downlink control channel PDCCH transmission of this C-RNTI scrambling.
22. as arbitrary described terminal equipment in claim 17-21, it is characterized in that, this terminal equipment also comprises:
Maintenance unit, the TAC order or the SS order that for monitoring network side, send, according to the TA adjustment amount information of carrying in the TAC order listened to or SS order, adjust up TA; Perhaps,
According to descending timing offset, adjust the time point of up TA or uplink.
23. as arbitrary described terminal equipment in claim 18-21, it is characterized in that, described acquiring unit also for:
Obtain the mobile attribute information of storage, if the terminal equipment in mobile attribute information indication group maintains static, adopt described method two or method three; If the terminal equipment mass motion in mobile attribute information indication group, adopt described method one; If the terminal equipment in mobile attribute information indication group, in mobile state, adopts described method four.
24. as arbitrary described terminal equipment in claim 18-21, it is characterized in that, this terminal equipment also comprises:
Report unit, for the process at access network, the mobile attribute information that self is stored reports base station.
25. a base station, be applied to, in the group communication scheme based on MTU, it is characterized in that, this base station comprises:
Receiving element, the random access procedure of initiating for the terminal equipment received in group;
Determining unit, for determining the up TA of this terminal equipment;
Transmitting element, for sending to described terminal equipment by described up TA.
26. base station as claimed in claim 25, is characterized in that, this base station also comprises:
Indicating member, during for the MTU in described terminal equipment is group, after described up TA is sent to MTU, send to the other-end equipment in group by described up TA.
27. base station as claimed in claim 26, is characterized in that, described indicating member is used for:
For the LTE system, after MTU and network side establish a communications link, after carrying out data receiver by the other-end equipment in the PDCCH dispatch group of G-RNTI scrambling, this up TA and the C-RNTI joined for this component are together sent to the other-end equipment in group; Perhaps,
After MTU and network side establish a communications link, after carrying out data receiver by the other-end equipment in the PDCCH dispatch group of G-RNTI scrambling, the C-RNTI that this component is joined sends to the other-end equipment in group; After carrying out data receiver by the other-end equipment in the PDCCH dispatch group of C-RNTI scrambling, the RRC that carries this up TA is connected to reconfiguration message and send to the other-end equipment in group.
28. base station as claimed in claim 26, is characterized in that, described indicating member is used for:
For the UMTS system, after MTU and network side establish a communications link, receive the group that comprises this up TA that RNC sends and connect and sets up Indication message;
After carrying out data receiver by the other-end equipment in the HS-SCCH dispatch group of G-RNTI scrambling, this up TA is sent to the other-end equipment in group by HS-PDSCH.
29. base station as claimed in claim 25, is characterized in that, this base station also comprises:
Trigger element, before the random access procedure of initiating for the terminal equipment in receiving group, to group, interior terminal equipment sends the uplink scheduling signaling of the dedicated preamble of carrying distribution;
Described receiving element is used for:
Receive the random access procedure that described terminal equipment is used described dedicated preamble to initiate.
30. base station as claimed in claim 29, is characterized in that, described trigger element is used for:
After terminal equipment in the configuration information by C-RNTI and all wireless links sends to group, send the uplink scheduling signaling of the dedicated preamble of carrying distribution to this terminal equipment.
31. as arbitrary described base station in claim 26-28, it is characterized in that, described indicating member also for:
The mobile attribute information reported in the process of access network according to the mobile terminal in group, determine that this moves the terminal equipment mass motion in whether indication group of attribute information, when being defined as being, described up TA sent to the other-end equipment in group.
32. as arbitrary described base station in claim 29-30, it is characterized in that, described trigger element is used for:
The mobile attribute information reported in the process of access network according to the mobile terminal in group, determine that this moves the interior terminal equipment of whether indication group of attribute information in mobile state, when being defined as being, to group, interior terminal equipment sends the uplink scheduling signaling of the dedicated preamble of carrying distribution.
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| CN113316956A (en) * | 2019-01-11 | 2021-08-27 | 中兴通讯股份有限公司 | Timing advance adjustment scheme in wireless communications |
| CN113316956B (en) * | 2019-01-11 | 2022-11-18 | 中兴通讯股份有限公司 | Wireless communication method, wireless communication apparatus, and computer storage medium |
| WO2020034574A1 (en) | 2019-01-11 | 2020-02-20 | Zte Corporation | Timing advance adjustment schemes in wireless communication |
| WO2020173415A1 (en) * | 2019-02-25 | 2020-09-03 | 华为技术有限公司 | Communication method, terminal device, and network device |
| CN111615215A (en) * | 2019-02-25 | 2020-09-01 | 华为技术有限公司 | Communication method, terminal equipment and network equipment |
| CN114979976A (en) * | 2022-05-11 | 2022-08-30 | 中国电信股份有限公司 | Data processing method, device, equipment and medium |
| CN114979976B (en) * | 2022-05-11 | 2023-11-03 | 中国电信股份有限公司 | Data processing method, device, equipment and medium |
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