CN103796287A - Data transmission method and system in heterogeneous network - Google Patents
Data transmission method and system in heterogeneous network Download PDFInfo
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- CN103796287A CN103796287A CN201210431959.1A CN201210431959A CN103796287A CN 103796287 A CN103796287 A CN 103796287A CN 201210431959 A CN201210431959 A CN 201210431959A CN 103796287 A CN103796287 A CN 103796287A
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Abstract
The invention discloses a data transmission method in a heterogeneous network. The method comprises: a PCell of UE realizing a PDCP layer, an RLC layer, a MAC layer and a physical layer, and an SCell of the UE realizing an RLC layer, a MAC layer and a physical layer, wherein an MME sends an S1 control signaling to the PCell, and the PCell sends an RRC signaling to the UE; and an SGW sending the data of the UE to the PCell, the PCell dividing the data of the UE in the PDCP layer, then sending each path of the data to the UE via the PCell and/or the SCell of the UE, and the UE recombining the data in the PDCP layer and then sending to an application layer. The invention also discloses a data transmission system in a heterogeneous network. By adopting the technical scheme disclosed by the invention, the cooperation among heterogeneous networks can be realized, the resources of the heterogeneous networks can be fully utilized, and the overall heterogeneous networks are more energy-saving.
Description
Technical field
The application relates to wireless communication technology field, particularly data transmission method and the system under a kind of heterogeneous network.
Background technology
Present mobile communication more and more trends towards providing for user the multimedia service of high rate data transmission, as shown in Figure 1, is the system architecture diagram of System Architecture Evolution (SAE).Wherein:
Subscriber equipment (UE) the 101st, is used for receiving the terminal equipment of data.Evolved universal terrestrial radio access network (E-UTRAN) the 102nd, Radio Access Network, comprising the macro base station (eNodeB/NodeB) that access of radio network interface is provided for UE.Mobile management entity (MME) 103 is in charge of mobile context, session context and the security information of UE.Gateway (SGW) 104 mainly provides the function of user plane, and MME 103 and SGW 104 may be in Same Physical entities.Grouped data network gateway (PGW) 105 is responsible for the functions such as charging, Lawful Interception, also can be with SGW 104 in Same Physical entity."Policy and Charging Rules Function entity (PCRF) 106 provides service quality (QoS) strategy and charging criterion.Universal grouping wireless business supporting node (SGSN) the 108th, provides the apparatus for network node of route for the transmission of data in universal mobile telecommunications system (UMTS).Home subscriber server (HSS) the 109th, the local ownership subsystem of UE, responsible protection comprises the user profile such as address, user security information, the packet data content of subscriber equipment of current location, the service node of subscriber equipment.
At present LTE(Long Term Evolution) in system, the maximum bandwidth that each community is supported is 20MHz, in order to improve the peak rate of UE, LTE-Advanced system has been introduced carrier aggregation technology.By carrier aggregation technology, UE can be simultaneously and the cell communication that is operated in different carrier frequencies of being controlled by same eNB, makes transmission bandwidth be up to 100MHz, thus the up-downgoing peak rate of the UE that can be multiplied.
For the UE being operated under carrier aggregation, the community of polymerization is divided into He Fu community, main plot (PCell:PrimaryCell) (SCell:Secondary Cell), and frequency corresponding to aggregation cell is called respectively boss's carrier wave (PCC:Primary Component Carrier) and auxiliary subcarrier (SCC:Secondary ComponentCarrier).
PCell is merely able to have one, and always in state of activation, PCell can only change by handoff procedure, and UE can only be in PCell sending and receiving NAS information, and PUCCH also can only send at PCell.
According to the ability of UE, eNB can connect reprovision (RRC Reconfigurarion) process by RRC and configure one or more SCell to UE.Particularly, eNB sends RRC connection and reshuffles (RRCConnectionReconfiguration) message to UE, the configuration information of SCell is included in and (in the SCellToAddModList-r10 message of RRCConnectionReconfiguration message, comprises index (SCellIndx), the physical I D of SCell, downlink carrier frequency, the specific radio resource configuration parameters in community and the specific radio resource configuration parameters of UE etc. of each SCell in SCellToAddModList-r10 message.Wherein, the specific radio resource configuration parameters in community comprises the content of system broadcast message in the required all SCell of UE, to guarantee that UE is without the specific wireless resource configuration in community that can obtain required SCell by reading system broadcast message in SCell.
In order to reduce the power consumption of UE, SCell is after configuration, in unactivated state (Deactivated).ENB activates or SCell of deexcitation by the MAC Control Element of MAC layer, and the MAC Control Element of activation/deactivation SCell takies a byte, and the logic channel ID that this MAC Control Element is corresponding is 11011.Wherein R is reservation bit, is made as 0; C
ithe state of the SCell that corresponding SCellIndex is i, if i.e. C
ibe 1, the SCell of SCellIndex=i is state of activation; If C
ibe 0, the SCell of SCellIndex=i is unactivated state.
After each SCell activates, UE can start a corresponding deexcitation timer.If UE has detected PDCCH or the PDCCH for this SCell detected on other Serving cell on this SCell, just can restart this deexcitation timer.If deexcitation timer expiry, UE thinks that this SCell enters unactivated state.In addition, if UE receives the RRC reallocation message with switching command, UE thinks that all SCell that configured enter unactivated state.When SCell enters unactivated state from state of activation, UE will empty all HARQ buffer memorys that this SCell is corresponding.
If a SCell is in unactivated state, or enter unactivated state from state of activation, UE should defer to following rule:
1) on this SCell, do not monitor PDCCH;
2) do not monitor the PDCCH for this SCell;
3) on this SCell, do not send detection reference signal (SRS:Sounding Reference Signal) and uplink synchronous channel (UL-SCH);
4) do not report channel quality indication (Channel Quality the Identity)/agate array that prelists indication (Precoding Matrix Index)/grade of this SCell to indicate (Rank Indicator), corresponding abbreviation: CQI/PMI/RI.
On the contrary, if a SCell in state of activation, UE need to defer to following rule:
1) on this SCell, monitor PDCCH(in self scheduling situation);
2) monitor the PDCCH for this SCell;
3) above send SRS according to this SCell that is configured in of eNB;
4) report the CQI/PMI/RI etc. of this SCell.
In order to keep the behavior between eNB and UE consistent in time, if UE receives the MAC Control Element (also can be described as: SCell activation instruction) that activates SCell on subframe n, so, the operation of UE under SCell state of activation should start to carry out from subframe n+8; If UE receives SCell deexcitation order on subframe n, so, in the operation of UE under SCell unactivated state, should before subframe n+8, carry out with the irrelevant operation of CSI, operation relevant to CSI in the operation of UE under SCell unactivated state should be carried out at subframe n+8.
In above-mentioned prior art, carrier aggregation is all carried out between same eNBXia community, does not relate to the carrier aggregation across eNB.
Operator is on-premise network by stages, and the type of base station also has multiple, for example macro base station, micro-base station, Pico base station, Home eNodeB, and in addition, the mode of access also has multiple.So just form in same geographic area, may dispose dissimilar base station, the situation of service is provided for UE simultaneously.
Fig. 2 is that existing heterogeneous network is disposed schematic diagram.As shown in Figure 2, in same area, have multiple communities to repeat to cover, LTE community B, community C, community D and community E, completely under the covering of community A.Community A can be UMTS or GSM community, also can ShiLTE community.Community A, for this region provides basic wireless coverage, is the community of disposing the earliest, and its coverage is larger than other communities.Along with the raising of user capacity, the user of certain areas is very concentrated and user capacity is very large, and the quality (QoS) of the service that user capacity and number of users, user need has relation.Number of users is more, and qos requirement is higher, and the user capacity that community need to provide is larger, need to dispose new cell equipment in this area.Such as community B, community C, community D and community E, these community main purposes are in order to promote user capacity, and more advanced access technology is provided, and its coverage is less than community A.Community A seamless coverage this region, for this region provides service, and the coverage of Hot Spot may be discontinuous, and this deployment is called to heterogeneous network.
Under heterogeneous network, new data transmission scheme need to be proposed, to realize working in coordination with between heterogeneous network, and make full use of the resource of heterogeneous network, make whole heterogeneous network more energy-conservation.
Summary of the invention
The application provides data transmission method and the system under a kind of heterogeneous network, to realize working in coordination with between heterogeneous network, and makes full use of the resource of heterogeneous network, makes whole heterogeneous network more energy-conservation.
Data transmission method under a kind of heterogeneous network that the application provides, comprising:
PDCP (PDCP) layer, wireless link control (RLC) layer, media access control (MAC) layer and physical layer are realized in the main plot (PCell) of UE, and UEFu community (SCell) realizes rlc layer, MAC layer and physical layer, wherein:
S1 control signal is sent to PCell by mobile management entity (MME), and wireless link control (RRC) signaling is sent to subscriber equipment (UE) by PCell;
The data of described UE are sent to PCell by gateway (SGW), PCell by the data of described UE at PDCP layer along separate routes, then each circuit-switched data is sent to UE via Pcell and/or the Scell of UE, UE reconfigures data at PDCP layer, then sends to application layer.
Preferably, in the time that the base station at PCell place determines to increase Yi Ge community as SCell, the base station at PCell place sends SCell to the base station at this SCell place increases request message, in message, comprise the configuration information of the LTE carrying that will set up, the mark that this configuration information comprises UE, the mark of carrying, RLC configuration information and MAC configuration information;
The base station at SCell place sends SCell to the base station at PCell place increases response message, in this message, comprise the physical layer specific configuration information of SCell, described physical layer specific configuration information comprises: upstream physical layer specific configuration information and down physical layer specific configuration information; Wherein, configuration information, uplink SRS configuration information and uplink power control configuration information that upstream physical layer specific configuration information comprises uplink antenna configuration information, up USCH channel information, CQI report, down physical layer specific configuration information comprises aerial information, for example transmission mode, UE emitting antenna selecting is closed loop or open loop, also comprises configuration information and the DSCH specific configuration information of CSI-RS;
PCell sends RRC reconfiguration message to UE, comprises physical layer specific configuration information and the physical layer general configuration information of SCell in message.
Preferably, described SCell increases the physical layer general configuration information that also comprises described SCell in response message, the configuration information of the public configuration information that described physical layer general configuration information comprises Physical Downlink Shared Channel (PDSCH) and physical layer retransmission indicating channel (PHICH).
Preferably, one of them base station in any two base stations sends X2 interface to another base station and sets up request message, comprises the physical layer general configuration information of Serving cell in the service cell information of this message;
Described another base station is returned to X2 interface to a described base station and is set up response message, comprises the physical layer general configuration information of Serving cell in the service cell information of this message;
In the time that the configuration information of Serving cell changes, the base station at this place, Serving cell sends base station configuration updating information to the base station of X2 interface opposite end, wherein, in configuration information increase and Serving cell modification, also comprise the physical layer general configuration information of this Serving cell;
The public configuration information that described physical layer general configuration information comprises PDSCH and the configuration information of PHICH.
Preferably, if the data of a LTE radio bearer (E-RAB) are transmitted by PCell and N1 SCell, data are divided into 1+N1 road by the PDCP floor of PCell, the PCell of leading up to transmission, and all the other N1 roads are transferred to UE by each SCell;
If the data of an E-RAB are only by N2 SCell transmission, data are divided into N2 road by the PDCP floor of PCell, and be transferred to UE by corresponding SCell.
Preferably, if the data of an E-RAB are by PCell and N1 SCell transmission, in the RRC reconfiguration message that PCell sends to UE, also comprise MAC configuration information, RLC configuration information and physical layer configurations information;
If the data of an E-RAB are only by N2 SCell transmission, and RLC configuration information and the MAC configuration information of having reused PCell, in the RRC reconfiguration message that PCell sends to UE, only comprise physical layer configuration information.
Preferably, the method may further include SCell dispose procedure:
SCell receives the report information of physical layer from UE, obtain the quality condition of described SCell, the base station at SCell place sends to the quality condition of SCell by SCell state report message the base station at PCell place, or the base station at SCell place sends to the indication information of asking PCell to discharge this SCell by SCell state report message the base station at PCell place;
The base station at PCell place sends SCell releasing request message to the base station at SCell place, comprises the mark of the SCell of request release in message;
The base station at SCell place sends SCell to the base station at PCell place and discharges response message;
The base station at PCell place sends RRC reconfiguration request message to UE, comprises the mark of SCell in message, requires UE to discharge described SCell;
UE sends RRC reconfiguration response message to the base station at PCell place.
Preferably, the method may further include the process that activates SCell:
In the time receiving the packet that sends to UE, the base station at SCell place sends SCell activation request message to the base station at PCell place;
The base station at PCell place sends SCell to the base station at SCell place and activates response message, and whether notice allows the activation of described SCell;
PCell sends SCell activation instruction to UE, comprises the mark of the SCell of request activation in this instruction;
UE and SCell carry out uplink synchronous;
The base station at SCell place sends SCell to the base station at PCell place and activates success message.
Preferably, after the process that activates SCell, may further include the process of deexcitation SCell:
The base station at SCell place sends SCell deexcitation request message to the base station at PCell place, comprises the mark of SCell in message;
The base station at PCell place sends SCell deexcitation response message to the base station at SCell place;
The base station at PCell place sends SCell deexcitation instruction to UE, comprises the mark of SCell in message.
The application also provides a kind of SCell method for releasing, is applicable to different base station Zhong community to carry out the situation of carrier aggregation, comprising:
SCell receives the report information of physical layer from UE, obtain the quality condition of described SCell, the base station at SCell place is reported message by SCell state and the quality condition of SCell is sent to the base station at PCell place, or indication information that message request PCell discharges this SCell is reported and sent to the base station at PCell place in the base station at SCell place by SCell state;
The base station at PCell place sends SCell releasing request message to the base station at SCell place, comprises the mark of the SCell of request release in message;
The base station at SCell place sends SCell to the base station at PCell place and discharges response message;
The base station at PCell place sends RRC reconfiguration request message to UE, comprises the mark of SCell in message, requires UE to discharge described SCell;
UE sends RRC reconfiguration response message to the base station at PCell place.
Data transmission system under a kind of heterogeneous network that the application provides, comprise: at least two base stations, also comprise subscriber equipment (UE), mobile management entity (MME) and gateway (SGW), described at least two base stations are respectively the base station at the place, He Fu community, base station (SCell) at the place, main plot (PCell) of UE, wherein:
PCell realizes PDCP (PDCP) layer, wireless link control (RLC) layer, media access control (MAC) layer and physical layer, and auxiliary community (SCell) realizes rlc layer, MAC layer and physical layer;
S1 control signal is sent to PCell by MME, and wireless link control (RRC) signaling is sent to UE by PCell;
The data of described UE are sent to PCell by SGW, and PCell by the data of described UE at PDCP layer along separate routes, then sends to UE by each circuit-switched data via PCell and/or the SCell of UE, and UE reconfigures data at PDCP layer, then sends to application layer.
Preferably, in the time that the base station at PCell place determines to increase Yi Ge community as SCell according to the report of UE, the base station at PCell place sends SCell to the base station at this SCell place increases request message, in message, comprise the configuration information of the LTE carrying that will set up, the mark that this configuration information comprises UE, the mark of carrying, RLC configuration information and MAC configuration information;
The base station at SCell place sends SCell to the base station at PCell place increases response message, in this message, comprise the physical layer specific configuration information of SCell, described physical layer specific configuration information comprises: upstream physical layer specific configuration information and down physical layer specific configuration information; Wherein, configuration information, uplink SRS configuration information and uplink power control configuration information that upstream physical layer specific configuration information comprises uplink antenna configuration information, up USCH channel information, CQI report, down physical layer specific configuration information comprises aerial information, for example transmission mode, UE emitting antenna selecting is closed loop or open loop, also comprises configuration information and the DSCH specific configuration information of CSI-RS;
PCell sends RRC reconfiguration message to UE, comprises physical layer specific configuration information and the physical layer general configuration information of SCell in message.
Preferably, the base station at described SCell place also increases the physical layer general configuration information that carries described SCell in response message, the configuration information of the public configuration information that described physical layer general configuration information comprises Physical Downlink Shared Channel (PDSCH) and physical layer retransmission indicating channel (PHICH) at described SCell.
Preferably, described at least two base stations also send the physical layer general configuration information of the Serving cell of this base station in X2 interface process of establishing to the other side, and preserve the physical layer general configuration information of the other side's Serving cell;
In the time that the configuration information of Serving cell changes, the base station at this place, Serving cell also sends base station configuration updating information to the base station of X2 interface opposite end, wherein, in configuration information increase and Serving cell modification, also comprise the physical layer general configuration information of this Serving cell;
The public configuration information that described physical layer general configuration information comprises PDSCH and the configuration information of PHICH.
As seen from the above technical solution, data transmission method under the heterogeneous network that the application provides and system, by realized PDCP layer, rlc layer, MAC layer and physical layer by the PCell of UE, the SCell of UE realizes rlc layer, MAC layer and physical layer, and, S1 control signal is sent to PCell by MME, and RRC signaling is sent to UE by PCell; The data of UE are sent to PCell by SGW, PCell by the data of UE at PDCP layer along separate routes, then each circuit-switched data is sent to UE via Pcell and/or the Scell of UE, UE reconfigures data at PDCP layer, then send to application layer, realize working in coordination with between heterogeneous network, and taken full advantage of the resource of heterogeneous network, made whole heterogeneous network more energy-conservation.
Accompanying drawing explanation
The existing SAE system architecture diagram of Fig. 1;
The existing heterogeneous network of Fig. 2 is disposed schematic diagram;
Fig. 3 is across eNB carrier aggregation schematic diagram;
Fig. 4 is the transmission of the application's control signal and transfer of data schematic diagram;
Fig. 5 is the schematic diagram of the embodiment of the present application one X2 interface process of establishing and community configured information renewal process;
Fig. 6 is the process schematic diagram that the embodiment of the present application two increases SCC;
Fig. 7 is the process schematic diagram that the embodiment of the present application three discharges SCC;
Fig. 8 is the process schematic diagram of the embodiment of the present application four activation and deexcitation SCC.
Embodiment
For making the application's object, technical scheme and advantage clearer, referring to the accompanying drawing embodiment that develops simultaneously, the application is described in further detail.
The application has proposed a kind of implementation of new transfer of data, by working in coordination with of heterogeneous network, for UE provides data service.The main thought of this scheme is: carrier aggregation is carried out in different base station Zhong community, preferably, for example, by participating in the coverage compare great community (: the A of community shown in Fig. 2) of carrier aggregation as PCell, for example, by participating in the coverage compare little community (: the B ~ E of community shown in Fig. 2) of carrier aggregation as SCell, PCell provides mobile management function for UE, and determines which cell coordination provides data service for UE.This scheme can reduce the handoff procedure of UE, reduces the transmitting power of base station and UE, and reduces the signalling between base station, makes whole heterogeneous network more energy-conservation.
Fig. 3 is across eNB carrier aggregation schematic diagram.According to Fig. 3, PCell and SCell are respectively on different base stations, and PCell provides mobile management function.Under framework shown in Fig. 3, need to rethink how data are transmitted.
Fig. 4 is the schematic diagram of the transmission of the application's control signal and transfer of data.Suppose that PCell and SCell are on different base stations, and suppose PCell corresponding be macrocell, what Scell was corresponding is Pico community.Fig. 4 left side is the schematic diagram of control signal transmission, and right side is the schematic diagram of transfer of data.According to Fig. 4, the PCell of UE realizes PDCP (PDCP) layer, wireless link control (RLC) layer, media access control (MAC) layer and physical layer, and the SCell of UE realizes rlc layer, MAC layer and physical layer.S1 control signal sends to from MME the macrocell that PCell is corresponding, and RRC signaling is transmitted between PCell and UE, and physical layer signaling is present between PCell and UE, is also present between SCell and UE.Data send to PCell from SGW, and wherein the PDCP agreement of datum plane realizes on PCell, and rlc layer and MAC layer are realized on PCell and SCell.
If the data of a LTE radio bearer (E-RAB) are by PCell and N1 SCell transmission, data are divided into 1+N1 road by the PDCP floor of PCell, the PCell of leading up to transmission, and all the other N1 roads are by N1 SCell transmission.UE receives after data, at PDCP layer, data is reconfigured, and then sends to application layer to process.
If the data of an E-RAB are only transmitted by SCell, the PDCP floor of PCell is divided into data the number of N2(SCell) road, then send to corresponding SCell, each SCell sends to UE successively by each circuit-switched data respectively after rlc layer, MAC layer, physical layer process, after UE receives, also correspondingly carry out successively, after physical layer, MAC layer, rlc layer processing, by PDCP layer, data being reconfigured, then send to application layer.
It should be noted that, in following embodiment, supposing needs to set up X2 interface between the eNB at PCell place and the eNB at SCell place, and PCell obtains the configuration information of SCell by the X2 interface between eNB.Also can define new interface and realize, if define new interface, the corresponding title of using in an embodiment new interface replaces X2 interface.
Embodiment mono-:
The present embodiment is described the process of the configuration information of exchanging cell between eNB.The configuration parameter relevant with configuration SCell can be divided into two classes, and a class is semi-static configuration parameter, and a class is dynamic configuration parameter.Semi-static configuration parameter can exchange in X2 interface process of establishing between eNB.ENB by X2 interface process of establishing by the contiguous eNB of semi-static configuration parameter notice relevant to configuration SCell, afterwards, the semi-static configuration parameter of receiving is preserved in the base station of this vicinity, and after configure in the process of auxiliary community for UE, use this semi-static configuration parameter.PCell is in for UE configuration SCell, if SCell and PCell are on different base stations, PCell is to the dynamic configuration parameter of SCell request SCell, for example: physical layer specific configuration information, PCell can send to UE by RRC signaling the semi-static configuration parameter of SCell (physical layer general configuration information) and dynamic configuration parameter (physical layer specific configuration information) afterwards.
Fig. 5 is the schematic diagram of the embodiment of the present application one X2 interface process of establishing and community configured information renewal process, can comprise the following steps:
Step 501: base station 1 sends that " X2 sets up request information to base station 2.
X2 process of establishing is in order to exchange application layer configuration parameter between base station, can normally be worked in two base stations." X2 sets up the information that comprises the Serving cell on base station 1 in request information; the packets of information of Serving cell, containing the PLMN mark of the physical layer identifications (PCI) of community, cell ID, community, up-downgoing frequency and the bandwidth of community, also comprises the information of antenna port number, MBSFN subframe and the configuration information of physical layer access channel (PRACH).
Except above-mentioned information, " information that X2 sets up the Serving cell in request information also comprises the required semi-static configuration parameter of configuration SCell, that is: the physical layer general configuration information of community, the public configuration information that physical layer general configuration information comprises DSCH Downlink Shared Channel (PDSCH), the reference signal power of for example PDSCH, physical layer general configuration information also comprises the configuration information of physical layer retransmission indicating chanel (P HICH:Physical Hybrid ARQIndicator Channel), for example: the duration of PHICH is normal or spreads, the information such as the resource of PHICH.
Step 502: base station 2 sends " X2 sets up response " message to base station 1.
The information that comprises the Serving cell on base station 2 in " X2 sets up response " message, the packets of information of Serving cell, containing the PLMN mark of the PCI of community, cell ID, community, up-downgoing frequency and the bandwidth of community, also comprises antenna port number, the information of MBSFN subframe and the configuration information of PRACH.
Except above-mentioned information, the information of the Serving cell in " X2 sets up response " message also comprises the required semi-static configuration parameter of configuration SCell, that is: the general configuration information of physical layer, the public configuration information that the configuration information of physical layer general comprises PDSCH, the reference signal power of for example PDSCH, physical layer general configuration information also comprises the configuration information of PHICH, and the duration of for example PHICH is normal or spreads the information such as the resource of PHICH.
By step 501 and step 502, complete the X2 interface process of establishing between base station 1 and base station 2.
In the time that the configuration information of the Serving cell of certain base station changes, the base station of X2 interface opposite end need to be notified in this base station.There is change in the configuration information of supposing the Serving cell of base station 1 below, by process below, base station 1 can be by the new configuration information informing base station 2 of Serving cell.
Step 503: base station 1 sends " base station configuration updating " message to base station 2.
In " base station configuration updating " message, comprise the one or more combination in following information: information, the information of Serving cell of modification and the information of the Serving cell of deletion of the Serving cell increasing on base station 1.Packets of information that increase and Serving cell modification is containing the configuration information after upgrading in community.The PLMN mark of PCI that the configuration information of community comprises community, cell ID, community, up-downgoing frequency and the bandwidth of community, also comprise antenna port number, the information of MBSFN subframe and the configuration of PRACH.
The configuration information with the Serving cell of revising increasing also comprises the physical layer general configuration information of this Serving cell, the public configuration information that physical layer general configuration information comprises PDSCH, the reference signal power of for example PDSCH, physical layer general configuration information also comprises the configuration of PHICH, the duration of for example PHICH is normal or spreads the information such as the resource of PHICH.
Step 504: base station 2 sends " base station configuration updating confirmation " message to base station 1, for confirming that base station 2 received the message that base station 1 sends in step 503.
So far, community configured information renewal process finishes.
Embodiment bis-:
It is the process that UE sets up PCell and SCell that the present embodiment is described network.Referring to Fig. 6, this process, to set up a SCell as example, can comprise the following steps:
Step 601:UE sets up RRC with base station and is connected.In carrier aggregation, the community that UE sets up with it RRC connection is the PCell of UE.
Here the process that, RRC connection is set up is the same with the process of definition at present.Briefly describe this process: UE below and send RRC connection request message to PCell, message comprises UE will set up the information such as the reason of RRC and the mark of UE; PCell sends RRC and sets up message to UE, the configuration information that message comprises signaling bear; UE sends RRC and sets up response message to PCell, the PLMN mark that message comprises NAS message and UE selection.
Step 602:PCell sends initial uplink message transfer to MME.
The mark that message comprises UE, and comprise the NAS message that UE sends.
Step 603:MME sends initial context and sets up request message to PCell.
The indication information of wireless capability, enciphered message and the UE ability of configuration information, the UE of the carrying that message comprises the LTE that UE sets up in the mark of S1 interface, for UE.
Step 604:PCell sets up the context of UE, is UE distributing radio resource, and sends RRC reconfiguration request to UE.
This message is the message of having reused current definition, therefore, the content of message is repeated no more herein.
Step 605:UE sends RRC reconfiguration response message to PCell.
This message is the message of having reused current definition, therefore, the content of message is repeated no more herein.
Step 606:PCell sends initial context and sets up response message to MME.
This message comprises UE at the mark of S 1 interface, the mark of LTE carrying being successfully established and the tunnel information of downlink data reception.
Step 607:PCell sends and measures configuration to UE, and configuration UE is measured.Measurement configuration information has configured measuring object and the reporting mechanism of UE.
Step 608:UE sends measurement report to PCell, reports measurement result.
Suppose according to measurement report, it is that UE sends data as SCell that PCell determines to increase Yi Ge community.For example, UE is nearer apart from certain community, the quality of reception that UE reports this community in measurement report has met the requirement of predetermined threshold, PCell can determine this cell configuration to become the SCell of UE, the data of UE send to UE by SCell, like this, the base station at SCell place can send data to UE with less power.
In the time that PCell determines that increase Yi Ge community is UE transmission data as SCell, PCell will send the message of 609 steps.
The base station at step 609:PCell place sends SCell increases the base station of request message to SCell place.
The configuration information that message comprises the LTE carrying that will set up, the information such as the mark that this configuration information comprises UE, the mark of carrying, RLC configuration information and MAC configuration information.UE is identified at this UE of unique identification on X2 interface; The mark of carrying is used for distinguishing the different carrying of this UE between base station; Concrete configuration under the pattern that RLC configuration information comprises RLC and this pattern; The configuration parameter that MAC configuration information comprises HARQ, the configuration that buffer status is reported etc.
The base station at step 610:SCell place sends SCell increases the base station of response message to PCell place.
Message at least comprises the physical layer specific configuration information as SCell, specifically comprises descending and up information.Down physical layer specific configuration information comprises aerial information, for example transmission mode, and UE emitting antenna selecting is closed loop or open loop, also comprises configuration information and the DSCH specific configuration information of CSI-RS.Configuration information, uplink SRS configuration information and uplink power control configuration information that upstream physical layer specific configuration information comprises uplink antenna configuration information, up USCH channel information, CQI report.
If PCell does not get the physical layer general configuration information of SCell by method described in embodiment mono-, so, the base station at SCell place also need to increase the physical layer general configuration information that carries SCell in response message at SCell.The public configuration information that physical layer general configuration information comprises PDSCH, the reference signal power of for example PDSCH, physical layer general configuration information also comprises the configuration information of PHICH, for example: the duration of PHICH is normal or spreads the information such as the resource of PHICH.
Step 611:PCell crosses RRC reconfiguration message information exchange corresponding SCell and sends to UE, the physical layer general configuration information of the SCell preserving before the physical layer specific configuration information of the SCell that message comprises 610 steps and PCell.
If the data transmission architecture shown in employing Fig. 4, data send to UE by PCell and SCell simultaneously, and message also comprises MAC configuration information, RLC configuration information and physical layer configurations information; If data only send to data by SCell, and have reused RLC configuration information and the MAC configuration information of PCell, so, in message, can only comprise physical layer configuration information.
Afterwards, data send to PCell from core net, then send to SCell by PCell, then send to UE by SCell.
So far the process that, SCell increases finishes.
Embodiment tri-:
The present embodiment is described the process that discharges a SCell, and as shown in Figure 7, this process can comprise the following steps:
The base station at step 701:SCell place sends SCell state and reports the base station of message to PCell place.
Between SCell and UE, transmit data, and the signaling of physical layer for transmission and MAC layer, SCell can be by the report information of the physical layer received, and the report information of for example CQI obtains the quality condition of this SCell.This quality condition is reported to PCell by SCell, and PCell can monitor the quality condition of SCell.The report of quality condition can be periodically, or Event triggered, the mechanism that can be reported by PCell or OAM configuration.Take Event triggered as example, if the quality of SCell does not meet predetermined requirement within a period of time, SCell can send SCell state and report the base station of message to PCell place, reports the quality of SCell.For example: when mass ratio is poor, SCell can comprise concrete quality condition, the value of for example CQI; Or report the grade situation of quality, such as good, in, the grade such as bad.If mass ratio is poor, this status request is equal to the release of asking this SCell.Message comprises the mark of UE on X2, the mark of carrying and the quality condition of SCell that this SCell is corresponding.
Or SCell can be according to the report information of this community, request PCell discharges this SCell, and in this case, SCell state is reported in message can comprise the indication information of asking PCell to discharge this SCell.
The base station at step 702:Pcell place sends the base station of SCell releasing request message to SCell place, and request SCell discharges this carrying.The mark that this message comprises SCell.
The base station at step 703:Scell place sends SCell and discharges the base station of response message to PCell place, confirms the release of this carrying.
The base station at step 704:Pcell place sends RRC reconfiguration request message to UE, requires UE to discharge SCell.Message comprises the mark that SCell is corresponding.
Step 705:UE sends the base station of RRC reconfiguration response message to Pcell place.
So far the process that, SCell discharges finishes.
Embodiment tetra-:
The present embodiment is described the process of activation and a SCell of deexcitation, and referring to Fig. 8, this process can comprise the following steps:
The base station at step 801:SCell place sends the base station of SCell activation request message to PCell place.
Whether SCell oneself has received that by monitoring the packet of issuing UE determines whether activating SCell.In SCell activation request, comprise the mark of UE and the bearing identification of SCell.
The base station at step 802:PCell place sends SCell and activates the base station of response message to SCell place, and whether notice SCell allows the activation of SCell.
Step 803:PCell sends SCell activation instruction to UE, and this message can send by MAC layer or rrc layer.In activation request message, comprise the mark of the SCell of request activation.
Step 804:UE carries out uplink synchronous by sending PRACH process and SCell.
If SCell activation instruction is to send by the MAC Control Element of MAC layer, need UE further to judge that whether self and SCell are in uplink synchronous state, if not, UE need to be according to the RACH of this SCell and PRACH configuration, PRACH process and SCell by competitive mode obtain uplink synchronous, and obtain PUCCH and SRS configuration, if so, this step can be omitted.
Step 805:SCell sends PRACH acknowledge message, the PUCCH of configuration UE and the configuration of SRS.
Obtain uplink synchronous and obtain the specific PUCCH of UE and after SRS is configured at UE and SCell, or in UE and the situation of certain SCell in uplink synchronous, receive the activation instruction sending by the MAC Control Element of MAC layer, the behavior of UE is as follows:
1) on this SCell, monitoring PDCCH(decodes at the C-RNTI of SCell by UE);
2) above send SRS according to this SCell that is configured in of SCell eNB;
3) CQI/PMI/RI(that reports this SCell by UE in the C-RNTI of SCell scrambling) etc.
The base station at step 806:SCell place sends SCell to the base station at PCell place and activates success message.
In the time that the base station at SCell place determines this SCell of deexcitation, execution step 807.
The base station at step 807:SCell place sends Scell deexcitation request message, the mark that message comprises this SCell to the base station at PCell place.
The base station at step 808:PCell place sends Scell deexcitation response message to the base station at SCell place.
The base station at step 809:PCell place sends Scell deexcitation instruction to UE, comprises the mark of this SCell in message.
So far, the process of activation and deexcitation SCell finishes.
As seen from the above-described embodiment, data transmission method under the heterogeneous network that the application provides and system, by realized PDCP layer, rlc layer, MAC layer and physical layer by the PCell of UE, the SCell of UE realizes rlc layer, MAC layer and physical layer, and, S 1 control signal is sent to PCell by MME, and RRC signaling is sent to UE by PCell; The data of UE are sent to PCell by SGW, PCell by the data of UE at PDCP layer along separate routes, then each circuit-switched data is sent to UE via Pcell and/or the Scell of UE, UE reconfigures data at PDCP layer, then send to application layer, realize working in coordination with between heterogeneous network, and taken full advantage of the resource of heterogeneous network, made whole heterogeneous network more energy-conservation.
The foregoing is only the application's preferred embodiment, not in order to limit the application, all within the application's spirit and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of the application's protection.
Claims (14)
1. the data transmission method under heterogeneous network, is characterized in that, comprising:
PDCP (PDCP) layer, wireless link control (RLC) layer, media access control (MAC) layer and physical layer are realized in the main plot (PCell) of subscriber equipment (UE), rlc layer, MAC layer and physical layer are realized in UEFu community (SCell), wherein:
S1 control signal is sent to PCell by mobile management entity (MME), and wireless link control (RRC) signaling is sent to UE by PCell;
The data of described UE are sent to PCell by gateway (SGW), PCell by the data of described UE at PDCP layer along separate routes, then each circuit-switched data is sent to UE via Pcell and/or the Scell of UE, UE reconfigures data at PDCP layer, then sends to application layer.
2. method according to claim 1, is characterized in that:
In the time that the base station at PCell place determines to increase Yi Ge community as SCell, the base station at PCell place sends SCell to the base station at this SCell place increases request message, in message, comprise the configuration information of the LTE carrying that will set up, the mark that this configuration information comprises UE, the mark of carrying, RLC configuration information and MAC configuration information;
The base station at SCell place sends SCell to the base station at PCell place increases response message, in this message, comprise the physical layer specific configuration information of SCell, described physical layer specific configuration information comprises: upstream physical layer specific configuration information and down physical layer specific configuration information; Wherein, configuration information, uplink SRS configuration information and uplink power control configuration information that upstream physical layer specific configuration information comprises uplink antenna configuration information, up USCH channel information, CQI report, down physical layer specific configuration information comprises aerial information, for example transmission mode, UE emitting antenna selecting is closed loop or open loop, also comprises configuration information and the DSCH specific configuration information of CSI-RS;
PCell sends RRC reconfiguration message to UE, comprises physical layer specific configuration information and the physical layer general configuration information of SCell in message.
3. method according to claim 2, is characterized in that:
Described SCell increases the physical layer general configuration information that also comprises described SCell in response message, the configuration information of the public configuration information that described physical layer general configuration information comprises Physical Downlink Shared Channel (PDSCH) and physical layer retransmission indicating channel (PHICH).
4. method according to claim 2, is characterized in that, the method further comprises:
One of them base station in any two base stations sends X2 interface to another base station and sets up request message, comprises the physical layer general configuration information of Serving cell in the service cell information of this message;
Described another base station is returned to X2 interface to a described base station and is set up response message, comprises the physical layer general configuration information of Serving cell in the service cell information of this message;
In the time that the configuration information of Serving cell changes, the base station at this place, Serving cell sends base station configuration updating information to the base station of X2 interface opposite end, wherein, in configuration information increase and Serving cell modification, also comprise the physical layer general configuration information of this Serving cell;
The public configuration information that described physical layer general configuration information comprises PDSCH and the configuration information of PHICH.
5. according to the method described in claim 1 to 4 any one, it is characterized in that:
If the data of a LTE radio bearer (E-RAB) are by PCell and N1 SCell transmission, data are divided into 1+N1 road by the PDCP floor of PCell, the PCell of leading up to transmission, and all the other N1 roads are transferred to UE by each SCell;
If the data of an E-RAB are only by N2 SCell transmission, data are divided into N2 road by the PDCP floor of PCell, and be transferred to UE by corresponding SCell.
6. method according to claim 5, is characterized in that:
If the data of an E-RAB, by PCell and N1 SCell transmission, also comprise MAC configuration information, RLC configuration information and physical layer configurations information in the RRC reconfiguration message that PCell sends to UE;
If the data of an E-RAB are only by N2 SCell transmission, and RLC configuration information and the MAC configuration information of having reused PCell, in the RRC reconfiguration message that PCell sends to UE, only comprise physical layer configuration information.
7. according to the method described in claim 1 to 4 any one, it is characterized in that, the method further comprises SCell dispose procedure:
SCell receives the report information of physical layer from UE, obtain the quality condition of described SCell, the base station at SCell place sends to the quality condition of SCell by SCell state report message the base station at PCell place, or the base station at SCell place sends to the indication information of asking PCell to discharge this SCell by SCell state report message the base station at PCell place;
The base station at PCell place sends SCell releasing request message to the base station at SCell place, comprises the mark of the SCell of request release in message;
The base station at SCell place sends SCell to the base station at PCell place and discharges response message;
The base station at PCell place sends RRC reconfiguration request message to UE, comprises the mark of SCell in message, requires UE to discharge described SCell;
UE sends RRC reconfiguration response message to the base station at PCell place.
8. according to the method described in claim 1 to 4 any one, it is characterized in that, the method further comprises the process that activates SCell:
In the time receiving the packet that sends to UE, the base station at SCell place sends SCell activation request message to the base station at PCell place;
The base station at PCell place sends SCell to the base station at SCell place and activates response message, and whether notice allows the activation of described SCell;
PCell sends SCell activation instruction to UE, comprises the mark of the SCell of request activation in this instruction;
UE and SCell carry out uplink synchronous;
The base station at SCell place sends SCell to the base station at PCell place and activates success message.
9. method according to claim 8, is characterized in that, further comprises the process of deexcitation SCell after the process that activates SCell:
The base station at SCell place sends SCell deexcitation request message to the base station at PCell place, comprises the mark of SCell in message;
The base station at PCell place sends SCell deexcitation response message to the base station at SCell place;
The base station at PCell place sends SCell deexcitation instruction to UE, comprises the mark of SCell in message.
10.Yi Zhongfu community (SCell) method for releasing, is applicable to different base station Zhong community to carry out the situation of carrier aggregation, it is characterized in that:
SCell receives the report information of physical layer from UE, obtain the quality condition of described SCell, the base station at SCell place sends to the quality condition of SCell by SCell state report message the base station at PCell place, or the base station at SCell place sends to the indication information of asking PCell to discharge this SCell by SCell state report message the base station at PCell place;
The base station at PCell place sends SCell releasing request message to the base station at SCell place, comprises the mark of the SCell of request release in message;
The base station at SCell place sends SCell to the base station at PCell place and discharges response message;
The base station at PCell place sends RRC reconfiguration request message to UE, comprises the mark of SCell in message, requires UE to discharge described SCell;
UE sends RRC reconfiguration response message to the base station at PCell place.
Data transmission system under 11. 1 kinds of heterogeneous networks, it is characterized in that, comprise: at least two base stations, also comprise subscriber equipment (UE), mobile management entity (MME) and gateway (SGW), described at least two base stations are respectively the base station at the place, He Fu community, base station (SCell) at the place, main plot (PCell) of UE, wherein:
PCell realizes PDCP (PDCP) layer, wireless link control (RLC) layer, media access control (MAC) layer and physical layer, and auxiliary community (SCell) realizes rlc layer, MAC layer and physical layer;
S1 control signal is sent to PCell by MME, and wireless link control (RRC) signaling is sent to UE by PCell;
The data of described UE are sent to PCell by SGW, and PCell by the data of described UE at PDCP layer along separate routes, then sends to UE by each circuit-switched data via PCell and/or the SCell of UE, and UE reconfigures data at PDCP layer, then sends to application layer.
12. systems according to claim 11, is characterized in that:
In the time that the base station at PCell place determines to increase Yi Ge community as SCell according to the report of UE, the base station at PCell place sends SCell to the base station at this SCell place increases request message, in message, comprise the configuration information of the LTE carrying that will set up, the mark that this configuration information comprises UE, the mark of carrying, RLC configuration information and MAC configuration information;
The base station at SCell place sends SCell to the base station at PCell place increases response message, in this message, comprise the physical layer specific configuration information of SCell, described physical layer specific configuration information comprises: upstream physical layer specific configuration information and down physical layer specific configuration information; Wherein, configuration information, uplink SRS configuration information and uplink power control configuration information that upstream physical layer specific configuration information comprises uplink antenna configuration information, up USCH channel information, CQI report, down physical layer specific configuration information comprises aerial information, for example transmission mode, UE emitting antenna selecting is closed loop or open loop, also comprises configuration information and the DSCH specific configuration information of CSI-RS;
PCell sends RRC reconfiguration message to UE, comprises physical layer specific configuration information and the physical layer general configuration information of SCell in message.
13. systems according to claim 12, is characterized in that:
The base station at described SCell place also increases the physical layer general configuration information that carries described SCell in response message, the configuration information of the public configuration information that described physical layer general configuration information comprises Physical Downlink Shared Channel (PDSCH) and physical layer retransmission indicating channel (PHICH) at described SCell.
14. systems according to claim 12, is characterized in that:
Described at least two base stations also send the physical layer general configuration information of the Serving cell of this base station in X2 interface process of establishing to the other side, and preserve the physical layer general configuration information of the other side's Serving cell;
In the time that the configuration information of Serving cell changes, the base station at this place, Serving cell also sends base station configuration updating information to the base station of X2 interface opposite end, wherein, in configuration information increase and Serving cell modification, also comprise the physical layer general configuration information of this Serving cell;
The public configuration information that described physical layer general configuration information comprises PDSCH and the configuration information of PHICH.
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| CN110740514A (en) * | 2018-07-20 | 2020-01-31 | 维沃移动通信有限公司 | monitoring method and terminal equipment |
| CN113596973A (en) * | 2019-02-02 | 2021-11-02 | 大唐移动通信设备有限公司 | SCG state control method, device, UE, MN, SN and medium |
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| CN110461029A (en) | 2019-11-15 |
| CN103796287B (en) | 2019-09-10 |
| CN110461029B (en) | 2022-07-08 |
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