CN105530077A - Retransmission packet retransmitting method for base stations with dual-connectivity for terminal, base station and terminal - Google Patents
Retransmission packet retransmitting method for base stations with dual-connectivity for terminal, base station and terminal Download PDFInfo
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Abstract
The invention provides a retransmission packet retransmitting method for base stations with dual-connectivity for a terminal, a base station and a terminal. The method includes: a) when data of the protocol data unit (PDU) of a downlink radio link control (RLC) protocol sublayer needs to be retransmitted during a process that a first base station transmits downlink data to a terminal, obtaining the signal quality of a first service cell connected with the terminal in the first base station and the signal quality of a second service cell connected to the terminal in a second base station,; and b) selecting the base station of the service cell with better signal quality (between the first service cell and the second service cell) to retransmit the PDU data. The method provided by the invention can select the other link to retransmit the PUD data to fully utilize the links and space diversity of dual-connectivity when the signal quality of the transmission channel becomes worse because of the terminal mobility. In this way, better transmission quality of the acknowledged mode (AM) service flow is ensured, the packet loss rate of the AM service flow is reduced, and better AM service performance can be obtained at cell borders.
Description
Technical field
The present invention relates to wireless communication technique field, particularly relate to a kind of retransmit with the retransmission packet of the base station of terminal dual link method, base station and terminal.
Background technology
In order to effectively improve the message capacity covering and increase system, current third generation partner program (3rdGenerationPartnershipProject, 3GPP) normal structure is studying the Its Relevant Technology Standards disposing source base station Serving cell SeNBservingcell in evolution (LongTermEvolution-Advanced, the LTE-A) system of Long Term Evolution.So-called SeNBservingcell, namely in the coverage of original macrocell, according to different orographic conditions and customer demand, in the one or more little base station bunch of specific regional deployment, increases power system capacity by in-plant communication and wireless resource multiplexing.SeNBservingcell base station is connected with using nonideal backhaul link between macro base station, makes to have certain collaboration communication ability therebetween.
Time within the coverage that user is in macrocell and SeNBservingcell simultaneously, radio resource control (the RadioResourceControl of two base stations can be kept simultaneously, RRC) presence, namely macrocell and Microcell can be this user service simultaneously, and user keeps macrocell and two, Microcell physical communication link.Like this can effectively adding users uplink and downlink communication speed, increase the message capacity of system.
When SeNBservingcell dual link is applied, the PDCP PDCP sublayer of a macro base station Serving cell MeNBservingcell carries agreement (IP) grouping interconnected between the network of (DRB) to each wireless traffic and submits to radio link control (RadioLinkControl corresponding to MeNBservingcell and SeNBservingcell according to the order arrived from core net and load balancing strategy, RLC) logic channel also transmits, to obtain satisfied dual link throughput.
At present, when SeNBservingcell dual link is applied, Long Term Evolution (LongTermEvolution, LTE) the PDCP sublayer of MeNBservingcell will need the PDCP frame of radio link control affirmation mode RLCAM transmission service, according to quality and the loading condition of two links, carry out AM transmission by certain policy selection by the rlc sublayer of MeNBservingcell or SeNBservingcell.
But in SeNBservingcell dual link situation, for the transmission of AM business, there is following technical problem in prior art:
During the RLC entity transmission of a current selection community cell, the link of this cell possible and terminal UE is due to the mobility of UE, likely can enter a dark shadow fading region or enter cell boarder and be deteriorated suddenly, even if cause the rlc protocol data cell PDU of this AM business repeatedly to retransmit, can not be correct be delivered to RLC entity corresponding to recipient and carry out the reset operation of RLCAM situation exist larger probability of happening.
Summary of the invention
Have problems to overcome in above-mentioned prior art, the invention provides a kind of retransmit with the retransmission packet of the base station of terminal dual link method, base station and terminal, link and the space diversity of dual link can be made full use of, improve the AM service transmission performance when channel caused due to UE mobility is deteriorated suddenly.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
According to one aspect of the present invention, provide a kind of method retransmitted with the retransmission packet of the base station of terminal dual link, described method comprises:
First base station is sending in the process of downlink data to terminal, when the data of the protocol Data Unit PDU of descending radio link control sublayer RLC need to retransmit, obtain the signal quality of the second service community connected with described terminal in the signal quality of the first service community connected with described terminal in the first base station and the second base station;
Select in the cell signal quality of described first service community and second service, the base station at place, signal quality good Serving cell, retransmits the data of described PDU.
Alternatively, in the cell signal quality of the described first service community of described selection and second service, the base station at place, signal quality good Serving cell, the step retransmitting the data of described PDU comprises:
The PDCP PDCP sublayer of the first base station obtains the sequence number of one or more PDCP frame that described first base station needs the RLCPDU retransmitted to comprise or obtains the data of RLCPDU;
The sequence number of one or more PDCP frame that the RLCPDU of acquisition comprises by the PDCP sublayer of described first base station sends to the rlc sublayer of the second base station to carry out entity transmission by X2 interface, or be PDCPPDU type by the data encapsulation of the RLCPDU of acquisition, add logical signal road, and send to the Serving cell of the second base station to send.
Alternatively, the step of the data of the described PDU of described re-transmission also comprises:
After the sequence number of one or more PDCP frame that the rlc sublayer entity that described terminal receives described second base station sends, the sequence number field according to PDCP frame carries out whole sequence and redundancy deletion to it, submits to ICP/IP protocol stack; Or after the PDCPPDU that the Serving cell that described terminal receives described second base station sends, carry out deblocking, according to the described logical signal road added, find RLC entity and re-assembly, the PDCPPDU going out to re-assembly by described RLC entity extraction is submitted to PDCP sublayer.
Alternatively, described first base station is macro base station MeNB, and described second base station is source base station SeNB; Or described first base station is source base station SeNB, described second base station is macro base station MeNB.
According to another aspect of the present invention, additionally provide a kind of method retransmitted with the retransmission packet of the base station of terminal dual link, described method comprises:
Terminal is sending in the process of upstream data to the first base station, when the data of the protocol Data Unit PDU of uplink radio link control protocol sublayer RLC need to retransmit, obtain the signal quality of the second service community connected with described terminal in the signal quality of the first service community connected with described terminal in the first base station and the second base station;
Select in the cell signal quality of described first service community and second service, the base station at place, signal quality good Serving cell, retransmits the data of described PDU.
Alternatively, in the cell signal quality of the described first service community of described selection and second service, the base station at place, signal quality good Serving cell, the step retransmitting the data of described PDU specifically comprises:
The PDCP PDCP sublayer of terminal obtains the sequence number of one or more PDCP frame that the first base station in terminal uplink needs the RLCPDU retransmitted to comprise or obtains the data of RLCPDU;
The sequence number of one or more PDCP frame that the RLCPDU of acquisition comprises by the PDCP sublayer of terminal sends to the rlc sublayer of the second base station to carry out entity transmission, or the data encapsulation of the RLCPDU of acquisition is PDCPPDU type by the PDCP sublayer of terminal, add logical signal road, and send to the rlc sublayer of the second base station to carry out entity transmission.
Alternatively, described first base station is macro base station MeNB, and described second base station is source base station SeNB; Or described first base station is source base station SeNB, described second base station is macro base station MeNB.
Alternatively, the step of the data of the described PDU of described re-transmission also comprises:
After the sequence number of one or more PDCP frame that the rlc sublayer entity that the PDCP sublayer of described first base station receives described second base station sends, sequence number field according to PDCP frame carries out whole sequence and redundancy deletion to it, submit to ICP/IP protocol stack, or after the PDCPPDU that the rlc sublayer entity that the PDCP sublayer of described first base station receives described second base station sends, carry out deblocking, according to the described logical signal road added, find RLC entity and re-assembly, the PDCPPDU going out to re-assembly by described RLC entity extraction is submitted to PDCP sublayer.
According to another aspect of the present invention, additionally provide a kind of base station, comprising:
First acquisition module, for sending in the process of downlink data to terminal, when the data of the protocol Data Unit PDU of descending radio link control sublayer RLC need to retransmit, obtain the signal quality of the second service community connected with described terminal in the signal quality of the first service community connected with described terminal in described base station and another base station;
First retransmission module, for selecting in the cell signal quality of described first service community and second service, the base station at place, signal quality good Serving cell, retransmits the data of described PDU.
Alternatively, described first retransmission module comprises:
First acquiring unit, for obtaining the sequence number of one or more PDCP PDCP frame that described base station needs the RLCPDU retransmitted to comprise or obtaining the data of RLCPDU;
First transmitting element, sequence number for one or more PDCP frame comprised by the RLCPDU of acquisition sends to the rlc sublayer of another base station to carry out entity transmission by X2 interface, or be PDCPPDU type by the data encapsulation of the RLCPDU of acquisition, add logical signal road, and send to the Serving cell of another base station to send.
Alternatively, described first base station is macro base station MeNB, and described second base station is source base station SeNB; Or described first base station is source base station SeNB, described second base station is macro base station MeNB.
According to another aspect of the present invention, additionally provide a kind of terminal, comprising:
Second acquisition module, for sending in the process of upstream data to base station, when the data of the protocol Data Unit PDU of uplink radio link control protocol sublayer RLC need to retransmit, obtain the signal quality of the second service community connected with described terminal in the signal quality of the first service community connected with described terminal in described base station and another base station;
Second retransmission module, for determining in the cell signal quality of described first service community and second service, the base station at place, signal quality good Serving cell, retransmits the data of described PDU.
Alternatively, described second retransmission module comprises:
Second acquisition unit, the sequence number of one or more PDCP PDCP frame that the RLCPDU that the needs for obtaining on base station retransmit comprises or the data of acquisition RLCPDCP;
Second transmitting element, sequence number for one or more PDCP frame comprised by the RLCPDU of acquisition sends to the rlc sublayer of another base station to carry out entity transmission, or be PDCPPDU type by the data encapsulation of the RLCPDCP of acquisition, add logical signal road, and send to the rlc sublayer of another base station to carry out entity transmission.
Alternatively, described first base station is macro base station MeNB, and described second base station is source base station SeNB; Or described first base station is source base station SeNB, described second base station is macro base station MeNB.
The invention has the beneficial effects as follows: in embodiments of the present invention, in the process of up-downgoing transfer of data, when causing the signal quality of transmission channel to be deteriorated due to terminal mobility, when the data of the protocol Data Unit PDU of radio link control sublayer RLC need to retransmit, by obtaining the signal quality of the Serving cell of two base stations be connected with terminal and comparing, select the data of base station to above-mentioned PDU at place, signal quality good community to retransmit, link and the space diversity of dual link can be made full use of.
Further, in an embodiment of the present invention, the data that can either realize on MeNB retransmit at SeNB, and the data that can realize on SeNB retransmit at MeNB again, therefore, in dual link application scenarios, better can ensure the transmission quality of AM Business Stream, reduce the packet loss of AM Business Stream, obtain better AM service feature, ensure that user is when cell boarder, also can obtain better AM service feature.
Accompanying drawing explanation
Fig. 1 represents that in embodiments of the invention, downlink transfer selects base station to retransmit the flow chart of PDU data;
Fig. 2 represents that in embodiments of the invention, downlink transfer retransmits the flow chart of PDU data;
Fig. 3 represents that in embodiments of the invention, uplink selects base station to retransmit the flow chart of PDU data;
Fig. 4 represents that in embodiments of the invention, uplink retransmits the flow chart of PDU data;
Fig. 5 represents the structured flowchart that in embodiments of the invention, base station end data retransmits;
Fig. 6 represents the structured flowchart of the first retransmission module in the embodiment of the present invention;
Fig. 7 represents the structured flowchart that in embodiments of the invention, terminal end data retransmits;
Fig. 8 represents the structured flowchart of the second retransmission module in the embodiment of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, describe the present invention below in conjunction with the accompanying drawings and the specific embodiments.
Embodiment one
As shown in Figure 1, in the embodiment of the present invention during downlink transfer, select base station to retransmit the flow chart of PDU data, method 100 comprises the steps:
Step S101, the first base station are sending in the process of downlink data to terminal, when the data of the protocol Data Unit PDU of descending radio link control sublayer RLC need to retransmit, obtain the signal quality of the second service community connected with terminal in the signal quality of the first service community connected with terminal in the first base station and the second base station;
Step S103, select in the cell signal quality of first service community and second service, the base station at place, signal quality good Serving cell, retransmits the data of PDU.
In embodiments of the present invention, when transfer of data, due to the mobility of terminal, when likely can enter a dark shadow fading region or enter cell boarder, the signal quality of transmission channel can be caused to be deteriorated, therefore, the data of the protocol Data Unit PDU of radio link control sublayer RLC need to retransmit, by obtaining the signal quality of the Serving cell of two base stations be connected with terminal, and compared, the data of base station to above-mentioned PDU at place, signal quality good community are selected to retransmit, even if ensure that user is at cell boarder, also better AM service feature can be obtained, reduce the packet loss of AM Business Stream.
Wherein, as shown in Figure 2, in an embodiment of the present invention, select in the cell signal quality of first service community and second service, the base station at place, signal quality good Serving cell, retransmits the data (step S103) of PDU, also specifically comprises the following steps:
The PDCP PDCP sublayer of step S1031, the first base station obtains the sequence number of one or more PDCP frame that the first base station needs the RLCPDU retransmitted to comprise or obtains the data of RLCPDU;
The sequence number of one or more PDCP frame that the RLCPDU of acquisition comprises by the PDCP sublayer of step S1033, the first base station sends to the rlc sublayer of the second base station to carry out entity transmission by X2 interface, or be PDCPPDU type by the data encapsulation of the RLCPDU of acquisition, add logical signal road, and send to the Serving cell of the second base station to send.
Terminal, after receiving the data retransmitted, can process it, in the present embodiment, after step S1033, also comprise:
After the sequence number of one or more PDCP frame that the rlc sublayer entity that step S1035, terminal receive the second base station sends, the sequence number field according to PDCP frame carries out whole sequence and redundancy deletion to it, submits to ICP/IP protocol stack; Or after the PDCPPDU that the Serving cell that terminal receives the second base station sends, carry out deblocking, according to the logical signal road added, find RLC entity and re-assembly, the PDCPPDU going out to re-assembly by RLC entity extraction is submitted to PDCP sublayer.
In inventive embodiments, be understandable that, specifically do not limit the first base station and the second base station, the first base station is macro base station MeNB, and the second base station is source base station SeNB; Or the first base station is source base station SeNB, the second base station is macro base station MeNB.
Wherein, when carrying out downlink transfer process, in dual link situation, when the PDCP sublayer of MeNBservingcell submits to a PDCP frame to send to the AM logical signal road of the rlc sublayer of MeNBservingcell, when this RLCAMPDU needs to retransmit, except can retransmitting under the servingcell of MeNB, can also retransmit under the servingcell of SeNB, also all can retransmit on MeNB and SeNB.
Particularly, the data on MeNB, when SeNB retransmits, comprise the steps, wherein, each step comprises two kinds of processing modes, and the mode 1 in each step is distinguished corresponding with mode 2:
Step one,
1, the data notification of the sequence number RLCPDCP of one or more PDCP frame that comprised by this RLCAMPDU of the rlc sublayer of MeNB is to the PDCP sublayer of MeNB;
2, RLCPDU is informed to the PDCP sublayer of MeNB by the rlc sublayer of MeNB;
Step 2,
1, the sequence number of one or more PDCP frame that the RLCPDU of acquisition comprises by the PDCP sublayer of MeNB sends to the RLC entity of SeNBservingcell to carry out AM transmission by X2 interface;
2, the data encapsulation of the RLCPDCP of acquisition is PDCPPDU type by the PDCP sublayer of MeNB, adds logical signal road, and sends to the servingcell of SeNB to send;
Step 3,
1, after the PDCP sublayer of terminal receives the PDCP frame of the non-newtype of decapsulation from the rlc sublayer entity of SeNB, after whole sequence and redundancy deletion being carried out to it according to the sequence number field of PDCP frame, ICP/IP protocol stack is submitted to.
2, terminal PDCP sublayer from the PDCP sublayer of SeNB receive new type PDCPPDU after, carry out deblocking, send corresponding RLC entity according to the logical signal road added, this RLC entity, through corresponding assembling, extracts the PDCPPDU re-assemblied and is submitted to PDCP sublayer.
Particularly, the data on SeNB, when MeNB retransmits, comprise the steps, wherein, each step comprises two kinds of processing modes, and the mode 1 in each step is distinguished corresponding with mode 2:
Step one,
1, the data notification of the sequence number RLCPDCP of one or more PDCP frame that comprised by this RLCAMPDU of the rlc sublayer of SeNB is to the PDCP sublayer of SeNB;
2, RLCPDU is informed to the PDCP sublayer of SeNB by the rlc sublayer of SeNB;
Step 2,
1, the sequence number of one or more PDCP frame that the RLCPDU of acquisition comprises by the PDCP sublayer of SeNB sends to the RLC entity of MeNBservingcell to carry out AM transmission by X2 interface;
2, the data encapsulation of the RLCPDU of acquisition is PDCPPDU type by the PDCP sublayer of SeNB, adds logical signal road, and sends to the servingcell of MeNB to send;
Step 3,
1, after the PDCP sublayer of terminal receives the PDCP frame of the non-newtype of decapsulation from the rlc sublayer entity of MeNB, after whole sequence and redundancy deletion being carried out to it according to the sequence number field of PDCP frame, ICP/IP protocol stack is submitted to.
2, terminal PDCP sublayer from the PDCP sublayer of MeNB receive new type PDCPPDU after, carry out deblocking, send corresponding RLC entity according to the logical signal road added, this RLC entity, through corresponding assembling, extracts the PDCPPDU re-assemblied and is submitted to PDCP sublayer.
Embodiment two
As shown in Figure 3, in the embodiment of the present invention during uplink, select base station to retransmit the flow chart of PDU data, method 300 comprises the steps:
Step S301, terminal are sending in the process of upstream data to the first base station, when the data of the protocol Data Unit PDU of uplink radio link control protocol sublayer RLC need to retransmit, obtain the signal quality of the second service community connected with terminal in the signal quality of the first service community connected with terminal in the first base station and the second base station;
Step S303, select in the cell signal quality of first service community and second service, the base station at place, signal quality good Serving cell, retransmits the data of PDU.
Wherein, as shown in Figure 4, in an embodiment of the present invention, select in the cell signal quality of first service community and second service, the base station at place, signal quality good Serving cell, retransmits the data (step S303) of PDU, also specifically comprises the following steps:
The PDCP PDCP sublayer of step S3031, terminal obtains the sequence number of one or more PDCP frame that the first base station in terminal uplink needs the RLCPDU retransmitted to comprise or obtains the data of RLCPDU;
The sequence number of one or more PDCP frame that the RLCPDU of acquisition comprises by the PDCP sublayer of step S3035, terminal sends to the rlc sublayer of the second base station to carry out entity transmission, or the data encapsulation of the RLCPDU of acquisition is PDCPPDU type by the PDCP sublayer of terminal, add logical signal road, and send to the rlc sublayer of the second base station to carry out entity transmission.
Second base station, after receiving the data retransmitted, can process it, in the present embodiment, after step S3033, also comprise:
After the sequence number of one or more PDCP frame that the rlc sublayer entity that the PDCP sublayer of step S3035, the first base station receives the second base station sends, sequence number field according to PDCP frame carries out whole sequence and redundancy deletion to it, submit to ICP/IP protocol stack, or after the PDCPPDU that the rlc sublayer entity that the PDCP sublayer of the first base station receives the second base station sends, carry out deblocking, according to the logical signal road added, find RLC entity and re-assembly, the PDCPPDU going out to re-assembly by RLC entity extraction is submitted to PDCP sublayer.
In inventive embodiments, be understandable that, specifically do not limit the first base station and the second base station, the first base station is macro base station MeNB, and the second base station is source base station SeNB; Or the first base station is source base station SeNB, the second base station is macro base station MeNB.
Wherein, when carrying out uplink process, in dual link situation, when the PDCP sublayer of UE is selected to be sent by the AM logic channel of the rlc sublayer entity with MeNBservingcell link, when this RLCAMPDU needs to retransmit, except can retransmitting under the servingcell of MeNB, can also retransmit under the servingcell of SeNB, also all can retransmit on MeNB and SeNB.
Particularly, the data on MeNB, when SeNB retransmits, comprise the steps, wherein, each step comprises two kinds of processing modes, and the mode 1 in each step is distinguished corresponding with mode 2:
Step one,
1, the data notification of the sequence number RLCPDCP of one or more PDCP frame that comprised by this RLCAMPDU of the rlc sublayer of UE is to the PDCP sublayer of UE;
2, RLCPDU is informed to the PDCP sublayer of UE by the rlc sublayer of UE;
Step 2,
1, the sequence number of one or more PDCP frame that the RLCPDU of acquisition comprises by the PDCP sublayer of UE sends to the RLC entity of SeNBservingcell to carry out AM transmission;
2, the data encapsulation of the RLCPDCP of acquisition is PDCPPDU type by the PDCP sublayer of UE, adds logical signal road, and sends to the RLC entity of the servingcell of SeNB to carry out AM transmission;
Step 3,
1, after the PDCP sublayer of MeNB receives the PDCP frame of the non-newtype of decapsulation from the rlc sublayer entity of SeNB, after whole sequence and redundancy deletion being carried out to it according to the sequence number field of PDCP frame, ICP/IP protocol stack is submitted to.
2, MeNB PDCP sublayer from the PDCP sublayer of SeNB receive new type PDCPPDU after, carry out deblocking, send corresponding RLC entity according to the logical signal road added, this RLC entity, through corresponding assembling, extracts the PDCPPDU re-assemblied and is submitted to PDCP sublayer.
Particularly, the data on SeNB, when MeNB retransmits, comprise the steps, wherein, each step comprises two kinds of processing modes, and the mode 1 in each step is distinguished corresponding with mode 2:
Step one,
1, the data notification of the sequence number RLCPDCP of one or more PDCP frame that comprised by this RLCAMPDU of the rlc sublayer of UE is to the PDCP sublayer of UE;
2, RLCPDU is informed to the PDCP sublayer of UE by the rlc sublayer of UE;
Step 2,
1,1 the sequence number of one or more PDCP frame that, the RLCPDU of acquisition comprises by the PDCP sublayer of UE sends to the RLC entity of MeNBservingcell to carry out AM transmission;
2, the data encapsulation of the RLCPDCP of acquisition is PDCPPDU type by the PDCP sublayer of UE, adds logical signal road, and sends to the RLC entity of the servingcell of MeNB to carry out AM transmission;
Step 3,
1, after the PDCP sublayer of MeNB receives the PDCP frame of the non-newtype of decapsulation from the rlc sublayer entity of MeNB, after whole sequence and redundancy deletion being carried out to it according to the sequence number field of PDCP frame, ICP/IP protocol stack is submitted to.
2, MeNB PDCP sublayer from the PDCP sublayer of MeNB receive new type PDCPPDU after, carry out deblocking, send corresponding RLC entity according to the logical signal road added, this RLC entity, through corresponding assembling, extracts the PDCPPDU re-assemblied and is submitted to PDCP sublayer.
Embodiment three
The embodiment of the invention also discloses a kind of base station, as shown in Figure 5, be the structured flowchart that base station end data in the embodiment of the present invention retransmits, wherein 500 comprise:
First acquisition module 501, for sending in the process of downlink data to terminal, when the data of the protocol Data Unit PDU of descending radio link control sublayer RLC need to retransmit, obtain the signal quality of the second service community connected with terminal in the signal quality of the first service community connected with terminal in base station and another base station;
First retransmission module 503, for selecting in the cell signal quality of first service community and second service, the base station at place, signal quality good Serving cell, retransmits the data of PDU.
In embodiments of the present invention, alternatively, as shown in Figure 6, the first retransmission module 503 also comprises:
First acquiring unit 5031, for obtaining the sequence number of one or more PDCP PDCP frame that base station needs the RLCPDU retransmitted to comprise or obtaining the data of RLCPDU;
First transmitting element 5033, sequence number for one or more PDCP frame comprised by the RLCPDU of acquisition sends to the rlc sublayer of another base station to carry out entity transmission by X2 interface, or be PDCPPDU type by the data encapsulation of the RLCPDU of acquisition, add logical signal road, and send to the Serving cell of another base station to send.
In inventive embodiments, be understandable that, specifically do not limit the first base station and the second base station, the first base station is macro base station MeNB, and the second base station is source base station SeNB; Or the first base station is source base station SeNB, the second base station is macro base station MeNB.
Embodiment four
The embodiment of the invention also discloses a kind of terminal, as shown in Figure 7, be the structured flowchart that terminal end data in the embodiment of the present invention retransmits, wherein 700 comprise:
Second acquisition module 701, for sending in the process of upstream data to base station, when the data of the protocol Data Unit PDU of uplink radio link control protocol sublayer RLC need to retransmit, obtain the signal quality of the second service community connected with terminal in the signal quality of the first service community connected with terminal in base station and another base station;
Second retransmission module 703, for determining in the cell signal quality of first service community and second service, the base station at place, signal quality good Serving cell, retransmits the data of PDU.
In embodiments of the present invention, alternatively, as shown in Figure 8, the first retransmission module 703 also comprises:
First acquiring unit 7031, for obtaining the sequence number of one or more PDCP PDCP frame that base station needs the RLCPDU retransmitted to comprise or obtaining the data of RLCPDU;
First transmitting element 7033, sequence number for one or more PDCP frame comprised by the RLCPDU of acquisition sends to the rlc sublayer of another base station to carry out entity transmission by X2 interface, or be PDCPPDU type by the data encapsulation of the RLCPDU of acquisition, add logical signal road, and send to the Serving cell of another base station to send.
In inventive embodiments, be understandable that, specifically do not limit the first base station and the second base station, the first base station is macro base station MeNB, and the second base station is source base station SeNB; Or the first base station is source base station SeNB, the second base station is macro base station MeNB.
Above is the preferred embodiment of the present invention, should be understood that the ordinary person for the art, and can also make some improvements and modifications not departing under principle prerequisite of the present invention, these improvements and modifications are also in protection scope of the present invention.
Claims (14)
1. the method retransmitted with the retransmission packet of the base station of terminal dual link, it is characterized in that, described method comprises:
First base station is sending in the process of downlink data to terminal, when the data of the protocol Data Unit PDU of descending radio link control sublayer RLC need to retransmit, obtain the signal quality of the second service community connected with described terminal in the signal quality of the first service community connected with described terminal in the first base station and the second base station;
Select in the cell signal quality of described first service community and second service, the base station at place, signal quality good Serving cell, retransmits the data of described PDU.
2. the method for claim 1, is characterized in that, in the cell signal quality of the described first service community of described selection and second service, and the base station at place, signal quality good Serving cell, the step retransmitting the data of described PDU comprises:
The PDCP PDCP sublayer of the first base station obtains the sequence number of one or more PDCP frame that described first base station needs the RLCPDU retransmitted to comprise or obtains the data of RLCPDU;
The sequence number of one or more PDCP frame that the RLCPDU of acquisition comprises by the PDCP sublayer of described first base station sends to the rlc sublayer of the second base station to carry out entity transmission by X2 interface, or be PDCPPDU type by the data encapsulation of the RLCPDU of acquisition, add logical signal road, and send to the Serving cell of the second base station to send.
3. method as claimed in claim 2, it is characterized in that, the step of the data of the described PDU of described re-transmission also comprises:
After the sequence number of one or more PDCP frame that the rlc sublayer entity that described terminal receives described second base station sends, the sequence number field according to PDCP frame carries out whole sequence and redundancy deletion to it, submits to ICP/IP protocol stack; Or after the PDCPPDU that the Serving cell that described terminal receives described second base station sends, carry out deblocking, according to the described logical signal road added, find RLC entity and re-assembly, the PDCPPDU going out to re-assembly by described RLC entity extraction is submitted to PDCP sublayer.
4. the method for claim 1, is characterized in that, described first base station is macro base station MeNB, and described second base station is source base station SeNB; Or described first base station is source base station SeNB, described second base station is macro base station MeNB.
5. the method retransmitted with the retransmission packet of the base station of terminal dual link, it is characterized in that, described method comprises:
Terminal is sending in the process of upstream data to the first base station, when the data of the protocol Data Unit PDU of uplink radio link control protocol sublayer RLC need to retransmit, obtain the signal quality of the second service community connected with described terminal in the signal quality of the first service community connected with described terminal in the first base station and the second base station;
Select in the cell signal quality of described first service community and second service, the base station at place, signal quality good Serving cell, retransmits the data of described PDU.
6. method as claimed in claim 5, is characterized in that, in the cell signal quality of the described first service community of described selection and second service, and the base station at place, signal quality good Serving cell, the step retransmitting the data of described PDU specifically comprises:
The PDCP PDCP sublayer of terminal obtains the sequence number of one or more PDCP frame that the first base station in terminal uplink needs the RLCPDU retransmitted to comprise or obtains the data of RLCPDU;
The sequence number of one or more PDCP frame that the RLCPDU of acquisition comprises by the PDCP sublayer of terminal sends to the rlc sublayer of the second base station to carry out entity transmission, or the data encapsulation of the RLCPDU of acquisition is PDCPPDU type by the PDCP sublayer of terminal, add logical signal road, and send to the rlc sublayer of the second base station to carry out entity transmission.
7. method as claimed in claim 5, it is characterized in that, described first base station is macro base station MeNB, and described second base station is source base station SeNB; Or described first base station is source base station SeNB, described second base station is macro base station MeNB.
8. method as claimed in claim 7, it is characterized in that, the step of the data of the described PDU of described re-transmission also comprises:
After the sequence number of one or more PDCP frame that the rlc sublayer entity that the PDCP sublayer of described first base station receives described second base station sends, sequence number field according to PDCP frame carries out whole sequence and redundancy deletion to it, submit to ICP/IP protocol stack, or after the PDCPPDU that the rlc sublayer entity that the PDCP sublayer of described first base station receives described second base station sends, carry out deblocking, according to the described logical signal road added, find RLC entity and re-assembly, the PDCPPDU going out to re-assembly by described RLC entity extraction is submitted to PDCP sublayer.
9. a base station, is characterized in that, comprising:
First acquisition module, for sending in the process of downlink data to terminal, when the data of the protocol Data Unit PDU of descending radio link control sublayer RLC need to retransmit, obtain the signal quality of the second service community connected with described terminal in the signal quality of the first service community connected with described terminal in described base station and another base station;
First retransmission module, for selecting in the cell signal quality of described first service community and second service, the base station at place, signal quality good Serving cell, retransmits the data of described PDU.
10. base station as claimed in claim 9, it is characterized in that, described first retransmission module comprises:
First acquiring unit, for obtaining the sequence number of one or more PDCP PDCP frame that described base station needs the RLCPDU retransmitted to comprise or obtaining the data of RLCPDU;
First transmitting element, sequence number for one or more PDCP frame comprised by the RLCPDU of acquisition sends to the rlc sublayer of another base station to carry out entity transmission by X2 interface, or be PDCPPDU type by the data encapsulation of the RLCPDU of acquisition, add logical signal road, and send to the Serving cell of another base station to send.
11. base stations as claimed in claim 9, it is characterized in that, described first base station is macro base station MeNB, and described second base station is source base station SeNB; Or described first base station is source base station SeNB, described second base station is macro base station MeNB.
12. 1 kinds of terminals, is characterized in that, comprising:
Second acquisition module, for sending in the process of upstream data to base station, when the data of the protocol Data Unit PDU of uplink radio link control protocol sublayer RLC need to retransmit, obtain the signal quality of the second service community connected with described terminal in the signal quality of the first service community connected with described terminal in described base station and another base station;
Second retransmission module, for determining in the cell signal quality of described first service community and second service, the base station at place, signal quality good Serving cell, retransmits the data of described PDU.
13. terminals as claimed in claim 12, it is characterized in that, described second retransmission module comprises:
Second acquisition unit, the sequence number of one or more PDCP PDCP frame that the RLCPDU that the needs for obtaining on base station retransmit comprises or the data of acquisition RLCPDU;
Second transmitting element, sequence number for one or more PDCP frame comprised by the RLCPDU of acquisition sends to the rlc sublayer of another base station to carry out entity transmission, or be PDCPPDU type by the data encapsulation of the RLCPDU of acquisition, add logical signal road, and send to the rlc sublayer of another base station to carry out entity transmission.
14. terminals as claimed in claim 12, it is characterized in that, described first base station is macro base station MeNB, and described second base station is source base station SeNB; Or described first base station is source base station SeNB, described second base station is macro base station MeNB.
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