WO2014169438A1 - 通信模式转换方法、装置和系统 - Google Patents
通信模式转换方法、装置和系统 Download PDFInfo
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- WO2014169438A1 WO2014169438A1 PCT/CN2013/074267 CN2013074267W WO2014169438A1 WO 2014169438 A1 WO2014169438 A1 WO 2014169438A1 CN 2013074267 W CN2013074267 W CN 2013074267W WO 2014169438 A1 WO2014169438 A1 WO 2014169438A1
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- 238000004891 communication Methods 0.000 title claims abstract description 313
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- 238000006243 chemical reaction Methods 0.000 claims description 234
- 230000005540 biological transmission Effects 0.000 claims description 169
- 238000012545 processing Methods 0.000 claims description 43
- 230000001413 cellular effect Effects 0.000 claims description 27
- 238000012546 transfer Methods 0.000 claims description 5
- 238000012937 correction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 48
- 230000010267 cellular communication Effects 0.000 description 36
- 230000007704 transition Effects 0.000 description 20
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/18—Selecting a network or a communication service
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/03—Reselecting a link using a direct mode connection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/03—Reselecting a link using a direct mode connection
- H04W36/033—Reselecting a link using a direct mode connection in pre-organised networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
Definitions
- the present invention relates to the field of communications, and in particular, to a communication mode conversion method, apparatus, and system. Background technique
- D2D (Device to Device) communication refers to direct communication between UEs (User Equipments), which is a new communication mode introduced on the basis of original cellular communication. Due to the dynamic nature of wireless channels, UEs often need to switch between different communication modes (D2D mode or cellular mode). For example, for a UE that is performing D2D communication, if the D2D link quality between UEs is poor to a certain extent, the UE needs to switch to the cellular mode to ensure continuity of service transmission.
- a communication mode conversion scheme is that, when a mode is switched, the UE performs continuous transmission of the UE service by transmitting parameters about the PDCP (Packet Data Convergence Protocol layer) to the eNB.
- the program has two problems:
- the UE only feeds back some PDCP parameters, such as HFN (Hyper) that does not include PDCP packets.
- HFN Hetero Network
- An object of the embodiments of the present invention is to provide a communication mode conversion method, apparatus, and system, to solve the problem of how to ensure service continuity when UE communication mode is switched.
- a communication mode conversion method is provided, where the method is applied to an eNB, where the method includes:
- the eNB sends the UE to the D2D link.
- the first mode conversion command is sent, and all PDCP transmission parameters and PDCP reception parameters are reset to zero.
- a communication mode conversion method is provided, where the method is applied to a UE in a D2D communication process, where the method includes:
- the UE If the UE receives the first mode switching command sent by the eNB, the UE resets all PDCP transmission parameters and PDCP reception parameters to 0, and transmits data on the communication mode converted link.
- a communication mode conversion method is provided, where the method is applied to an eNB, where the method includes:
- the eNB sends a mode conversion preparation command to the UE of the D2D link;
- the eNB uses the PDCP transmission parameter as a downlink transmission parameter of the D2D communication peer UE with the UE,
- the PDCP receiving parameter is used as a receiving parameter of an uplink of the D2D communication peer UE with the UE, and the PDCP status report is sent to the D2D communication peer UE of the UE;
- the eNB sends a second mode switch command to the UE.
- a communication mode conversion method is provided, where the method is applied to a UE in a D2D communication process, where the method includes:
- the UE If the UE receives the mode conversion preparation command sent by the eNB, the UE reports a PDCP transmission parameter, a PDCP reception parameter, and a PDCP status report to the eNB, so that the eNB uses the PDCP transmission parameter as the The downlink transmission parameter of the D2D communication of the UE to the UE, the PDCP reception parameter is used as the uplink reception parameter of the uplink UE of the D2D communication with the UE, and the PDCP status report is sent to The D2D of the UE communicates with the peer UE.
- a communication mode conversion method is provided, where the method is applied to an eNB, where the method includes:
- the eNB sends a mode conversion preparation command to the UE of the D2D link;
- the eNB resets PDCP transmission parameters and PDCP reception parameters of the link between the UE and the D2D communication peer UE of the UE according to the first lost PDCP receiving SN and the corresponding HFN, and the first one is lost.
- the PDCP receiving SN and the corresponding HFN are sent to the D2D communication peer UE of the UE;
- the eNB sends a second mode switch command to the UE.
- a communication mode conversion method is provided, where the method is applied to
- a UE in a D2D communication process where the method includes:
- the UE If the UE receives the mode switching preparation command sent by the eNB, the UE reports the first lost PDCP receiving SN and the corresponding HFN to the eNB, so that the eNB receives according to the first lost PDCP.
- the SN and the corresponding HFN reset their PDCP transmission parameters and PDCP reception parameters of the link between the UE and the D2D communication peer UE, and send the first lost PDCP reception SN and the corresponding HFN to the The UE's D2D communication peer UE.
- a communication mode conversion method is provided, where the method is applied to an eNB, where the method includes:
- the eNB sends a mode conversion preparation command to the UE of the D2D link;
- the eNB If receiving the PDCP transmission parameter, the PDCP receiving parameter, and the PDCP status report reported by the UE, the eNB forwards the PDCP transmission parameter, the PDCP receiving parameter, and the PDCP status report to the D2D communication peer UE of the UE Serving eNB.
- a communication mode conversion method is provided, where the method is applied to
- a UE in a D2D communication process where the method includes:
- the UE If the UE receives the mode switching preparation command sent by the eNB, the UE reports a PDCP transmission parameter, a PDCP receiving parameter, and a PDCP status report to the eNB, so that the eNB sends the PDCP transmission parameter, the PDCP receiving parameter, and The PDCP status report is forwarded to the serving eNB of the D2D communication peer UE of the UE.
- a communication mode conversion method is provided, where the method is applied to an eNB, where the method includes:
- the eNB sends a UE to the D2D link.
- the eNB If receiving the first lost PDCP receiving SN and the corresponding HFN reported by the UE, the eNB forwards the first lost PDCP receiving SN of the UE and the corresponding HFN to the D2D communication of the UE The serving eNB of the peer UE.
- a communication mode conversion method is provided, where the method is applied to
- a UE in a D2D communication process where the method includes:
- the UE If the UE receives the mode conversion preparation command sent by the eNB, the UE reports the first lost PDCP receiving SN and the corresponding HFN to the eNB, so that the eNB receives the first lost PDCP.
- the SN and the corresponding HFN are forwarded to the serving eNB of the D2D communication peer UE of the UE.
- a communication mode conversion method is provided, where the method is applied to an eNB, where the method includes:
- the eNB sends a mode switching preparation command to the UE of the D2D link, so that the UE maintains its cellular link;
- the eNB transmits data to the UE on a link before the communication mode transition until the core network data packet related to the D2D link is transmitted, or transmits data to the UE until it is related to the D2D link.
- the core network data packet and the data packets forwarded from other eNBs are all transmitted;
- the eNB sends a second mode switching command to the UE, so that the UE sends the next PDCP receiving SN and the corresponding HFN to its peer UE;
- the eNB sends a PDCP status report or the first lost PDCP receiving SN and a corresponding HFN to the UE, so that the UE retransmits the PDCP data packet accordingly.
- a communication mode conversion method is provided, where the method is applied to a UE, where the method includes:
- the UE If the UE receives a mode conversion preparation command sent by the eNB, the UE maintains a cellular link to receive data transmitted by the eNB;
- the UE If the UE receives the second mode switching command, the UE sends the next PDCP receiving SN and the corresponding HFN to its opposite UE.
- an eNB includes: a determining unit, configured to determine a mode switching manner according to a predetermined policy; And a processing unit, when the determining unit determines that the mode switching mode is no PDCP parameter interaction, sends a first mode switching command to the UE of the D2D link, and resets all PDCP transmission parameters and PDCP receiving parameters to. .
- a UE includes: a processing unit, when the UE receives a first mode switching command sent by an eNB, sends all PDCP transmission parameters and The PDCP receive parameter is reset to 0 and the data is transmitted on the link after the communication mode transition.
- an eNB includes: a determining unit, which determines a mode switching manner according to a predetermined policy;
- a first sending unit when the determining unit determines that the mode switching mode is a full PDCP parameter interaction, sending a mode conversion preparation command to the UE of the D2D link;
- the eNB when the eNB receives a PDCP transmission parameter, a PDCP reception parameter, and a PDCP status report reported by the UE, using the PDCP transmission parameter as a downlink of the D2D communication peer UE with the UE Transmitting parameters, the PDCP receiving parameter is used as a receiving parameter of an uplink of the D2D communication peer UE with the UE, and the PDCP status report is sent to the D2D communication peer UE of the UE;
- a second sending unit that sends a second mode switching command to the UE.
- a UE includes: a first sending unit, when the UE receives a mode switching preparation command sent by an eNB, reporting the signal to the eNB a PDCP transmission parameter, a PDCP reception parameter, and a PDCP status report, so that the eNB uses the PDCP transmission parameter as a transmission parameter of a downlink of the D2D communication peer UE with the UE, and uses the PDCP reception parameter as its And receiving, by the D2D of the UE, a receiving parameter of an uplink of the opposite UE, and transmitting the PDCP status report to the D2D communication peer UE of the UE.
- an eNB includes: a determining unit, which determines a mode switching manner according to a predetermined policy;
- a first sending unit when the determining unit determines that the mode switching mode is part of the PDCP parameter interaction, sending a mode conversion preparation command to the UE of the D2D link;
- a processing unit when the eNB receives the first lost PDCP receiving SN and the corresponding HFN reported by the UE, resetting the SN and the corresponding HFN according to the first lost PDCP
- the D2D communication of the UE communicates the PDCP transmission parameter and the PDCP reception parameter of the link between the peer UEs, and the A lost PDCP receiving SN and a corresponding HFN are sent to the D2D communication peer UE of the UE; and a second sending unit sends a second mode switching command to the UE.
- a UE includes: a first sending unit, when the UE receives a mode switching preparation command sent by an eNB, reporting the signal to the eNB
- the first lost PDCP receives the SN and the corresponding HFN, so that the eNB resets the link between the UE and the D2D communication peer UE of the UE according to the first lost PDCP receiving SN and the corresponding HFN.
- the PDCP transmission parameter and the PDCP reception parameter, and the first lost PDCP reception SN and the corresponding HFN are sent to the D2D communication peer UE of the UE.
- an eNB includes: a determining unit, which determines a mode switching manner according to a predetermined policy;
- a first sending unit when the determining unit determines that the mode switching mode is a full PDCP parameter interaction, sending a mode conversion preparation command to the UE of the D2D link;
- a first processing unit when the eNB receives the PDCP transmission parameter, the PDCP receiving parameter, and the PDCP status report reported by the UE, forwarding the PDCP transmission parameter, the PDCP receiving parameter, and the PDCP status report to the UE
- the D2D communicates with the serving eNB of the peer UE.
- a UE includes: a first sending unit, when the UE receives a mode switching preparation command sent by an eNB, reporting the signal to the eNB The PDCP transmission parameter, the PDCP reception parameter, and the PDCP status report, so that the eNB forwards the PDCP transmission parameter, the PDCP reception parameter, and the PDCP status report to the serving eNB of the D2D communication peer UE of the UE.
- an eNB includes: a determining unit, which determines a mode switching manner according to a predetermined policy;
- a first sending unit when the determining unit determines that the mode switching mode is part of the PDCP parameter interaction, sending a mode conversion preparation command to the UE of the D2D link;
- a first processing unit where the eNB receives the first lost PDCP reception reported by the UE
- the SN and the corresponding HFN forward the first lost PDCP receiving SN of the UE and the corresponding HFN to the serving eNB of the D2D communication peer UE of the UE.
- a UE includes: a first sending unit, when the UE receives a mode switching preparation command sent by an eNB, to the eNB The first lost PDCP receiving SN and the corresponding HFN are reported, so that the eNB forwards the first lost PDCP receiving SN and the corresponding HFN to the serving eNB of the D2D communication peer UE of the UE.
- an eNB includes: a determining unit, which determines a mode switching manner according to a predetermined policy;
- a first sending unit when the determining unit determines that the mode switching mode is a full PDCP parameter interaction or a partial PDCP parameter interaction, sending a mode switching preparation command to the UE of the D2D link, so that the UE maintains its cellular link;
- a first data transmission unit that transmits data to the UE on a link before the communication mode transition until the core network data packet related to the D2D link is transmitted, or transmits data to the UE until The core network data packets related to the D2D link and the data packets forwarded from other eNBs are transmitted;
- a second sending unit which sends a second mode switching command to the UE, so that the UE sends the next PDCP receiving SN and the corresponding HFN to its opposite UE;
- a third sending unit which sends a PDCP status report or a first lost PDCP receiving SN and a corresponding HFN to the UE, so that the UE retransmits the PDCP data packet accordingly.
- a UE includes: a receiving unit, when the UE receives a mode conversion preparation command sent by an eNB, maintaining a cellular link to receive the foregoing Data transmitted by the eNB;
- a sending unit when the UE receives the second mode switching command, sends the next PDCP receiving SN and the corresponding HFN to the D2D communication peer UE of the UE.
- a communication system comprising the eNB according to the thirteenth aspect, and at least two UEs according to the fourteenth aspect; or The communication system includes the eNB according to the fifteenth aspect, and at least two UEs according to the sixteenth aspect; or the communication system includes the eNB according to the seventeenth aspect, and at least two of the foregoing The UE according to the eighteenth aspect; or the communication system, comprising the eNB according to the nineteenth aspect, and at least two UEs according to the foregoing twentieth aspect; or, the communication system includes the foregoing twentieth An eNB according to one aspect, and at least two UEs according to the foregoing twenty-second aspect; or the communication system, comprising the eNB according to the foregoing twenty-third aspect, and at least two foregoing twenty-fourth aspects UE.
- a computer readable program wherein when the program is executed in a terminal device, the program causes the computer to execute the aforementioned second, fourth, sixth, and eighth in the terminal device ,
- the communication mode conversion method according to any of the ten or twelve aspects.
- a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the aforementioned second, fourth, sixth, eighth, tenth, The communication mode conversion method of any of the twelve aspects.
- a computer readable program wherein when the program is executed in a base station, the program causes the computer to execute the aforementioned first, third, fifth, seventh, and nine in the base station.
- a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the aforementioned first, third, fifth, seventh, nine, eleven in a base station A communication mode conversion method as described in any of the aspects.
- the beneficial effects of the embodiments of the present invention are as follows:
- the method, the device and the system of the embodiments of the present invention provide different solutions for different communication mode switching scenarios, thereby completely solving the problem of service continuity in mode switching.
- FIG. 1 is a schematic diagram of a network topology of a cellular communication mode
- FIG. 2 is a schematic diagram of a network topology of another cellular communication mode
- FIG. 3 is a schematic diagram of a network topology of a D2D communication mode
- FIG. 4 is a schematic diagram of a network topology of another D2D communication mode
- FIG. 5 is a flowchart of a communication mode conversion method according to Embodiments 1, 4, 7, and 10 of the present invention
- FIG. 6 is a schematic diagram of information interaction of the method of Embodiment 1;
- Figure 7 is a flowchart of a communication mode conversion method according to Embodiment 2 of the present invention.
- FIG. 8 is a schematic diagram of information interaction of the method shown in FIG. 7;
- FIG. 9 is a flowchart of a communication mode conversion method according to Embodiment 3 of the present invention.
- FIG. 10 is a schematic diagram of information interaction of the method shown in FIG. 9;
- FIG. 11 is a schematic diagram of information interaction of the method of Embodiment 4.
- FIG. 12 is a flowchart of a communication mode conversion method according to Embodiment 5 of the present invention
- FIG. 13 is a schematic diagram of information interaction of the method shown in FIG.
- FIG. 14 is a flowchart of a communication mode conversion method according to Embodiment 6 of the present invention.
- FIG. 15 is a schematic diagram of information interaction of the method shown in FIG.
- FIG. 17 is a flowchart of a communication mode conversion method according to Embodiment 8 of the present invention.
- FIG. 18 is a schematic diagram of information interaction of the method shown in FIG.
- FIG. 19 is a flowchart of a communication mode conversion method according to Embodiment 9 of the present invention.
- FIG. 20 is a schematic diagram of information interaction of the method shown in FIG.
- FIG. 21 is a schematic diagram of information interaction of the method of Embodiment 10.
- Figure 24 is a flowchart of a communication mode conversion method according to Embodiment 13 of the present invention
- Figure 25 is a flowchart of a communication mode conversion method according to Embodiment 14 of the present invention
- Figure 26 is a flowchart of a communication mode conversion method according to Embodiment 15 of the present invention
- Figure 27 is a flowchart of a communication mode conversion method according to Embodiment 16 of the present invention
- Figure 28 is a schematic diagram showing the composition of an eNB according to Embodiment 17 of the present invention.
- 29 is a schematic structural diagram of an eNB according to Embodiment 18 of the present invention.
- 30 is a schematic structural diagram of an eNB according to Embodiment 19 of the present invention.
- Figure 31 is a schematic diagram showing the composition of an eNB according to Embodiment 20 of the present invention.
- FIG. 32 is a schematic structural diagram of an eNB according to Embodiment 21 of the present invention.
- Figure 33 is a schematic diagram showing the composition of an eNB according to Embodiment 22 of the present invention.
- Figure 34 is a schematic diagram showing the composition of a UE in Embodiment 23 of the present invention.
- 35 is a schematic diagram showing the composition of a UE according to Embodiment 24 of the present invention.
- FIG. 36 is a schematic structural diagram of a UE according to Embodiment 25 of the present invention.
- Figure 37 is a schematic diagram showing the composition of a UE in Embodiment 26 of the present invention. detailed description
- the embodiments of the present invention take the cellular communication mode shown in FIG. 1 and FIG. 2 and the D2D communication mode shown in FIG. 3 and FIG. 4 as an example.
- the communication mode conversion method of the embodiment of the present invention is described, but it can be understood that the embodiment of the present invention is not limited to the above communication mode, and is applicable to other scenarios involving communication mode conversion.
- the continuity of the service when the communication mode is switched is implemented by exchanging PDCP parameters between the eNB and the UE, between the UE and the UE, and/or between the eNB and the eNB.
- the PDCP parameters in the current protocol mainly include: PDCP transmission parameters, PDCP reception parameters, and PDCP status reports.
- PDCP transmission parameters comprises 0 PDCP receiving parameters a PDCP packet transmission sequence number (SN, Serial Number) and the respective hyper frame number (HFN, Hyper Frame Number) comprises a next PDCP packet received SN and the corresponding HFN, And the last submitted PDCP receiving SN.
- the PDCP status report includes a first lost PDCP receiving SN and a corresponding HFN, and a bitmap reflecting the receiving status, wherein the bitmap may be started from the next SN of the first lost PDCP receiving SN, the length of which is Variable, for example, can be 0.
- the embodiment of the present invention proposes three mode conversion modes, that is, full PDCP parameter interaction, partial PDCP parameter interaction, and no PDCP parameter interaction.
- the PDCP parameters that need to be exchanged include: PDCP transmission parameters, PDCP reception parameters, and PDCP status reports.
- the PDCP parameters that need to be exchanged only include part of the PDCP state. Report, for example, that the first lost PDCP receives the SN and the corresponding HFN.
- the PDCP parameters of all nodes are reset to 0.
- Embodiments 1 to 3 are applicable to the scenario of switching from the D2D communication mode shown in FIG. 3 to the cellular communication mode shown in FIG. 2, and are also applicable to the transition from the D2D communication mode shown in FIG. 3 to FIG.
- the first embodiment is the case where the PDCP parameters are not interacted
- the second embodiment is the case where the full PDCP parameters are interacted
- the third embodiment is the case where the partial PDCP parameters are interacted.
- the embodiment of the invention provides a communication mode conversion method, and the method is applied to an eNB.
- Figure 5 is a flow chart of the method. Referring to Figure 5, the method includes:
- Step 501 The eNB determines a mode switching manner according to a predetermined policy.
- the eNB may decide to use one of the foregoing mode switching modes. For example, for a service with high real-time requirements and allowing partial data loss (session service, etc.), parameter-free interaction may be adopted. For services that are not real-time and do not allow data loss (interactive services, etc.), partial parameter interaction or full parameter interaction may be employed.
- the mode conversion mode that the eNB decides to use may be agreed in advance with the UE, or may be configured by using signaling (for example, RRC layer signaling), which is not limited by the embodiment of the present invention.
- Step 502 If the mode switching mode is no PDCP parameter interaction, the eNB sends a first mode switching command to the UE of the D2D link, and resets all PDCP transmission parameters and PDCP receiving parameters to 0.
- one eNB serves two UEs, and therefore, the eNB sends the first mode switching command to both UEs in the D2D communication mode. That is, the UE of the D2D link is, for example, UE1 and UE2 in the D2D communication mode shown in FIG.
- the mode switching command may be sent to the UE of the D2D link (for convenience of description, it is referred to as a first mode switching command in the embodiment of the present invention) , and reset all PDCP transmit parameters and PDCP receive parameters to zero.
- the UE receiving the first mode switching command also resets its PDCP transmission parameter and PDCP reception parameter to zero.
- the UE can complete the conversion from the D2D communication mode to the cellular communication mode, and can transmit data on the converted link.
- 6 is a schematic diagram of information exchange between an eNB and a UE in this embodiment. As shown in FIG.
- the eNB when an eNB determines to adopt a mode switching mode in which no PDCP parameter interaction is performed, the eNB sends a first mode switching command to UE1 and UE2, respectively. Reset its own PDCP transmit parameters and PDCP receive parameters to zero. After receiving the first mode switching command sent by the eNB, UE1 and UE2 also reset their respective PDCP transmission parameters and PDCP receiving parameters to 0, thereby completing the UE2 and UE2 from the D2D communication mode to the cellular communication mode. The conversion can transfer data on the converted link.
- the eNB when determining the mode switching mode using the PDCP parameter interaction, the eNB sends the first mode switching command to the UE of the D2D link, so that the UE resets its PDCP transmission parameter and the PDCP receiving parameter to 0, thereby completing the conversion of the communication mode.
- the embodiment of the invention further provides a communication mode conversion method, and the method is applied to an eNB.
- Figure 7 is a flow chart of the method. Referring to Figure 7, the method includes:
- Step 701 The eNB determines a mode switching manner according to a predetermined policy.
- step 501 of the step 701 is the same as that of the step 501 of the first embodiment, and the content thereof is incorporated herein, and details are not described herein again.
- Step 702 If the mode switching mode is a full PDCP parameter interaction, the eNB sends a mode conversion preparation command to the UE of the D2D link.
- the eNB may send a mode switching preparation command to the UE of the D2D link, so that the UE of the D2D link is ready to perform the communication mode conversion, when it is determined in step 701 that the mode switching mode is a full PDCP parameter interaction.
- the UE of the D2D link is the UE in the D2D communication process, and the UE1 and the UE2 shown in FIG. 2 are the same as the first embodiment.
- Step 703 If receiving the PDCP transmission parameter, the PDCP receiving parameter, and the PDCP status report reported by the UE, the eNB uses the PDCP transmission parameter as the downlink of the D2D communication peer UE with the UE. Transmitting a parameter, using the PDCP receiving parameter as a receiving parameter of an uplink of the D2D communication peer UE with the UE, and transmitting the PDCP status report to the D2D communication peer UE of the UE;
- the UE that receives the mode transition preparation command reports its PDCP transmission parameters, PDCP reception parameters, and PDCP status reports to its serving eNB.
- the eNB that receives the information performs parameter setting according to the received information, for example, receiving the received PDCP transmission parameter of the UE as its downlink transmission parameter with the opposite UE, and receiving The PDCP receiving parameter of the UE is taken as its receiving parameter with the uplink of the opposite UE.
- the eNB that receives the information may also send the received PDCP status report of the UE to the peer UE, so that the peer UE does not successfully receive the PDCP data packet according to the retransmission.
- Step 704 The eNB sends a second mode switching command to the UE.
- the eNB After the eNB performs the processing of the step 703 according to the received information, the eNB also sends a mode switching command to the UE (for convenience of description, in the embodiment of the present invention, a second mode switching command), the UE After receiving the second mode switching command, the conversion from the D2D communication mode to the cellular communication mode is completed, and then the data is transmitted on the converted link, for example, as described above, after the communication mode is converted.
- the PDCP packet that was not successfully received is retransmitted on the road.
- step 704 and step 703 is not limited.
- the two steps may be performed in combination, and the UE receives the PDCP status report of the communication peer UE (step 703 is sent). And the second mode switching command (sent by step 704), according to the PDCP status report of the communication peer UE, retransmitting the PDCP data packet that was not successfully received on the mode-switched link.
- FIG. 8 is a schematic diagram of information exchange between the eNB and the UE in this embodiment.
- the eNB when determining a mode switching mode in which full PDCP parameter interaction is used, the eNB sends a mode switching preparation command to UE1 and UE2, respectively.
- UE1 and UE2 After receiving the mode switching preparation command, UE1 and UE2 report their respective PDCP transmission parameters, PDCP reception parameters, and PDCP status reports to the eNB after receiving the mode switching preparation command.
- the eNB After receiving the above information sent by the UE1, the eNB will use the PDCP transmission parameter of the UE1 as its downlink transmission parameter with the UE2 (setting 1), and use the PDCP receiving parameter of the UE1 as its uplink with the UE2.
- the receiving parameter of the path (setting 2) simultaneously transmits the PDCP status report and the second mode switching command of UE1 to UE2, so that UE2 retransmits the PDCP data packet that was not successfully received on the mode-switched link.
- the eNB uses the PDCP transmission parameter of the UE2 as its downlink transmission parameter with the UE1, and uses the PDCP reception parameter of the UE2 as its uplink with the UE1.
- the receiving parameter simultaneously transmits the PDCP status report and the second mode switching command of the UE2 to the UE1, so that the UE1 retransmits the PDCP data packet that has not been successfully received on the mode-switched link.
- the UE can be converted from the D2D communication mode to the cellular communication mode. And all PDCP parameters are exchanged according to service requirements, ensuring continuity of services.
- the embodiment of the invention further provides a communication mode conversion method, and the method is applied to an eNB.
- Figure 9 is a flow chart of the method. Referring to Figure 9, the method includes:
- Step 901 The eNB determines a mode switching manner according to a predetermined policy.
- step 501 of the step 901 is the same as that of the step 501 of the first embodiment, and the content thereof is incorporated herein, and details are not described herein again.
- Step 902 If the mode switching mode is part of the PDCP parameter interaction, the eNB sends a mode conversion preparation command to the UE of the D2D link.
- the eNB may
- the UE of the D2D link transmits a mode conversion preparation command, so that the UE of the D2D link is ready to perform the communication mode conversion.
- the UE of the D2D link is the UE in the D2D communication process, and the UE1 and the UE2 shown in FIG. 2 are the same as the first embodiment.
- Step 903 If receiving the first lost PDCP received by the UE, receiving the SN and corresponding
- the eNB resets the PDCP transmission parameter and the PDCP reception parameter according to the first lost PDCP receiving SN and the corresponding HFN, and sends the first lost PDCP receiving SN and the corresponding HFN to the Determining the UE's D2D communication peer UE;
- the UE that receives the mode switching preparation command reports its first lost PDCP receiving SN and the corresponding HFN to its serving eNB.
- the eNB that receives the information resets its PDCP transmission parameters and PDCP reception parameters according to the received first lost PDCP receiving SN of the UE and the corresponding HFN, for example, the UE to be received.
- the PDCP transmission parameter is used as the transmission parameter of the downlink with the opposite UE, and the received first PDCP receiving SN and the corresponding HFN of the UE are sent to the opposite UE, so that the opposite UE
- the PDCP data packet is retransmitted, for example, from the first lost PDCP receiving SN and the corresponding HFN, and all transmitted PDCP data packets are retransmitted.
- Step 904 The eNB sends a second mode switching command to the UE.
- the eNB After the eNB performs the processing of step 903 according to the received information, the eNB further sends a second mode switching command to the UE, and after receiving the second mode switching command, the UE can complete the D2D.
- the HFN begins to retransmit all PDCP packets that have been sent.
- step 904 and step 903 is not limited.
- the two steps may be performed in combination, and the UE receives the lost from the first one of the communication peer UE.
- the PDCP After receiving the SN and the corresponding HFN (transmitted in step 903) and the second mode switching command (transmitted in step 904), the PDCP starts the mode conversion according to the communication terminal UE receiving the SN from the first lost PDCP. All PDCP packets that have been sent are retransmitted on the subsequent link.
- FIG. 10 is a schematic diagram of information exchange between the eNB and the UE in this embodiment.
- the eNB when determining a mode switching mode in which part of the PDCP parameter interaction is used, the eNB sends a mode conversion preparation command to UE1 and UE2, respectively. After receiving the mode switching preparation command, UE1 and UE2 report their respective first lost PDCP receiving SN and corresponding HFN to the eNB after receiving the mode switching preparation command. After receiving the above information sent by the UE1, the eNB resets its PDCP transmission parameter and PDCP reception parameter (setting 3) of the cellular link with the UE2 according to the information of the UE1, and the first lost PDCP of the UE1.
- the receiving SN and the corresponding HFN are sent to the UE2, so that after receiving the second mode switching command sent by the eNB, the UE2 retransmits the corresponding PDCP data packet accordingly.
- the eNB resets the PDCP transmission parameter and the PDCP receiving parameter of the cellular link with the UE1 according to the first lost PDCP receiving SN of the UE2 and the corresponding HFN (setting 3) And transmitting the first lost PDCP receiving SN of the UE2 and the corresponding HFN to the UE1, so that after receiving the second mode switching command, the UE1 retransmits the corresponding PDCP data packet accordingly.
- the eNB also sends a second mode switching command to UE1 and UE2, and UE1 and UE2 can complete the conversion from the D2D communication mode to the cellular communication mode according to the second mode switching command, and further on the converted link.
- the data is transmitted, for example, from the first lost PDCP receiving SN, and all the transmitted PDCP data packets are retransmitted.
- the UE can be converted from the D2D communication mode to the cellular communication mode, and only part of the PDCP parameters are exchanged according to service requirements, thereby ensuring continuity of services.
- Embodiments 4 to 6 are applicable to the scenario of switching from the D2D communication mode shown in Fig. 3 to the cellular communication mode shown in Fig. 1.
- Embodiment 4 is a case where no PDCP parameters are exchanged
- Embodiment 5 is a case where a complete PDCP parameter is exchanged
- Embodiment 6 is a case where a part of PDCP parameters are interacted.
- Example 4 The embodiment of the invention further provides a communication mode conversion method, and the method is applied to an eNB.
- the method can be implemented by the method shown in FIG. 5. Referring to FIG. 5, the method includes:
- Step 501 The eNB determines a mode switching manner according to a predetermined policy.
- Step 502 If the mode switching mode is no PDCP parameter interaction, the eNB sends a first mode switching command to the UE of the D2D link, and resets all PDCP transmission parameters and PDCP receiving parameters to 0.
- the UEs in the D2D communication mode are respectively served by two different eNBs. Therefore, in this embodiment, different eNBs send the first mode switching command to the UEs they serve according to the method shown in FIG. 5, and reset all PDCP transmission parameters and PDCP receiving parameters to zero. Similarly, the UE receiving the first mode switching command also resets its PDCP transmission parameter and the PDCP reception parameter to 0, thereby completing the conversion of the communication mode and transmitting the data on the converted link.
- FIG. 11 is a schematic diagram of information exchange between an eNB and a UE in this embodiment.
- eNB1 when determining a mode switching mode in which no PDCP parameter interaction is used, eNB1 sends a first mode switching command to UE1, and eNB2 sends a message to UE2.
- the first mode switching command at the same time, eNB1 and eNB2 reset the respective PDCP transmission parameters and PDCP reception parameters to zero.
- UE1 and UE2 After receiving the first mode switching command sent by the respective serving eNB, UE1 and UE2 also reset their respective PDCP transmission parameters and PDCP receiving parameters to 0, whereby UE1 and UE2 complete the D2D communication mode.
- the conversion of the cellular communication mode allows data to be transmitted over the converted link.
- the UE can be converted from the D2D communication mode to the cellular communication mode, and the PDCP parameters are not exchanged according to service requirements, thereby ensuring continuity of services.
- the embodiment of the invention further provides a communication mode conversion method, and the method is applied to an eNB.
- Figure 12 is a flow chart of the method. Referring to Figure 12, the method includes:
- Step 1201 The eNB determines a mode switching manner according to a predetermined policy.
- step 501 of the step 1 is the same as that of the step 501 of the first embodiment, and the content thereof is incorporated herein, and details are not described herein again.
- Step 1202 If the mode switching mode is a full PDCP parameter interaction, the eNB sends a mode conversion preparation command to the UE of the D2D link.
- the eNB may send a mode switching preparation command to the UE of the D2D link, so that the UE of the D2D link is ready to perform the conversion of the communication mode, when it is determined by the step 1201 that the mode switching mode is the full PDCP parameter interaction.
- the two eNBs serve two UEs respectively, and therefore, each eNB sends the foregoing mode conversion preparation command to the UE it serves. That is, the UE of the D2D link herein may be a UE in a D2D communication process, and the eNB serves the UE.
- Step 1203 If receiving the PDCP transmission parameter, the PDCP receiving parameter, and the PDCP status report reported by the UE, the eNB forwards the PDCP transmission parameter, the PDCP receiving parameter, and the PDCP status report to the D2D communication pair of the UE.
- the serving eNB of the end UE The serving eNB of the end UE.
- the UE that receives the mode transition preparation command reports its PDCP transmission parameters, PDCP reception parameters, and PDCP status reports to its serving eNB, similar to the second embodiment.
- the eNB that receives the information forwards the information to the serving eNB of the D2D communication peer UE of the UE, so that the serving eNB of the opposite UE sets the peer UE with the peer UE accordingly.
- the eNB receives the peer end sent by the serving eNB of the opposite UE
- the PDCP transmission parameter of the UE, the PDCP receiving parameter, and the PDCP status report, the eNB may use the PDCP transmission parameter of the opposite UE as its downlink transmission parameter with the UE, and the peer UE
- the PDCP receives the parameter as a receiving parameter of the uplink with the UE, and sends the PDCP status report and the second mode switching command of the opposite UE to the UE, so that the UE is after the mode conversion according to the The PDCP data that was not successfully received is retransmitted on the link.
- the step of transmitting the second mode switching command by the eNB to the UE it serves is not limited between the step of transmitting the PDCP status report of the peer UE to the UE served by the eNB.
- the order of these two steps can be combined.
- FIG. 13 is a schematic diagram of information exchange between an eNB and a UE in this embodiment.
- eNB1 when determining a mode switching mode in which full PDCP parameter interaction is used, eNB1 sends a mode conversion preparation command to UE1, and eNB2 sends a mode to UE2. Conversion preparation command.
- the UE1 and the UE2 report their respective PDCP transmission parameters, PDCP reception parameters, and PDCP status reports to the respective serving eNBs after receiving the mode conversion preparation command sent by the respective serving eNBs.
- the UE1 reports the PDCP transmission parameter, the PDCP reception parameter, and the PDCP reception parameter of the UE1 to the eNB1.
- the PDCP status report reports that the UE2 reports the PDCP transmission parameters, the PDCP reception parameters, and the PDCP status report of the UE2 to the eNB2.
- the eNB1 After receiving the foregoing information sent by the UE1, the eNB1 forwards the PDCP transmission parameter, the PDCP reception parameter, and the PDCP status report of the UE1 to the serving eNB of the UE2, that is, the eNB2. After receiving the PDCP transmission parameter, the PDCP reception parameter, and the PDCP status report of the UE1 transmitted by the eNB1, the eNB2 may set its downlink transmission parameter and the uplink reception parameter with the UE2 according to the UE1, for example, transmit the PDCP of the UE1.
- the parameter takes the PDCP receiving parameter of UE1 as the receiving parameter of the uplink with UE2, and sends the PDCP status report of UE1 to UE2, and sends the second mode conversion to UE2.
- the command is such that the UE 2 retransmits the PDCP data packet that was not successfully received, for example, retransmitting the PDCP data packet that was not successfully received on the mode-switched link.
- the eNB2 After receiving the foregoing information sent by the UE2, the eNB2 performs processing similar to the eNB1, for example, forwarding the PDCP transmission parameter, the PDCP receiving parameter, and the PDCP status report of the UE2 to the serving eNB of the UE1, that is, the eNB1. .
- the eNB1 After receiving the PDCP transmission parameter, the PDCP reception parameter, and the PDCP status report of the UE2 transmitted by the eNB2, the eNB1 also sets its downlink transmission parameter and the uplink reception parameter with the UE1 according to this, for example, the UE2
- the PDCP transmission parameter is used as the transmission parameter of the downlink with the UE1
- the PDCP reception parameter of the UE2 is used as the reception parameter of the uplink with the UE1
- the PDCP status report and the second mode conversion command of the UE2 are simultaneously sent to the UE1.
- the UE1 In order for the UE1 to retransmit the PDCP data packet that has not been successfully received, for example, on the mode-switched link, the PDCP data packet that has not been successfully received is retransmitted.
- the UE can be converted from the D2D communication mode to the cellular communication mode, and all PDCP parameters are exchanged according to service requirements, thereby ensuring continuity of services.
- FIG. 14 is a flow chart of the method. Referring to Figure 14, the method includes:
- Step 1401 The eNB determines a mode switching manner according to a predetermined policy.
- step 401 of the step 1401 is the same as that of the step 501 of the first embodiment, and the content thereof is incorporated herein, and details are not described herein again.
- Step 1402 If the mode switching mode is part of PDCP parameter interaction, the eNB sends a mode conversion preparation command to the UE of the D2D link.
- the eNB may send a mode switching preparation command to the UE of the D2D link, so that the UE of the D2D link is ready to perform the conversion of the communication mode, when it is determined by step 1401 that the mode switching mode is part of the PDCP parameter interaction.
- the two eNBs serve two UEs respectively, and therefore, each eNB sends the foregoing mode conversion preparation command to the UE it serves. That is, the UE of the D2D link herein may be a UE in a D2D communication process, and the eNB serves the UE.
- Step 1403 If receiving the first lost PDCP receiving SN and the corresponding HFN reported by the UE, the eNB forwards the first lost PDCP receiving SN of the UE and the corresponding HFN to the UE.
- the D2D communicates with the serving eNB of the peer UE.
- the UE that receives the mode switching preparation command reports its first lost PDCP receiving SN and the corresponding HFN to the serving eNB, similar to the embodiment 3.
- the eNB that receives the information forwards the information to the serving eNB of the D2D communication peer UE of the UE, so that the serving eNB of the opposite UE resets the PDCP transmission and reception parameters accordingly.
- the eNB if the eNB receives the first lost PDCP receiving SN and the corresponding HFN of the opposite UE sent by the serving eNB of the opposite UE, the eNB according to the peer UE The first lost PDCP receiving SN and the corresponding HFN resetting the PDCP transmission parameter and the PDCP receiving parameter, and transmitting the first lost PDCP receiving SN and the corresponding HFN of the opposite UE to the UE, so as to The UE retransmits the corresponding data according to this, for example, retransmitting all the PDCP data packets that have been transmitted from the first lost PDCP receiving SN.
- the eNB further sends a second mode switching command to the UE, so that the UE completes the conversion of the communication mode, and transmits data on the converted link, for example, retransmits the corresponding link on the converted link. data.
- the step of transmitting the second mode switching command by the eNB to the UE it serves is not limited between the step of transmitting the PDCP status report of the peer UE to the UE served by the eNB.
- the order of these two steps can be combined.
- FIG. 15 is a schematic diagram of information exchange between the eNB and the UE in this embodiment.
- the eNB1 when determining a mode switching mode in which part of the PDCP parameter interaction is used, the eNB1 sends a mode conversion preparation command to the UE1, and the eNB2 sends a mode to the UE2. Conversion preparation command.
- the UE1 and the UE2 report their respective first lost PDCP receiving SNs and corresponding HFNs to the respective serving eNBs after receiving the mode switching preparation command sent by the respective serving eNBs.
- UE1 reports its first lost PDCP receiving SN and corresponding HFN to eNB1
- UE2 reports its first lost PDCP receiving SN and corresponding HFN to eNB2.
- the eNB1 After receiving the above information sent by the UE1, the eNB1 resets the PDCP transmission parameter (setting 3), and forwards the first lost PDCP receiving SN and the corresponding HFN of the UE1 to the serving eNB of the UE2, that is, the eNB2. .
- eNB2 may reset its PDCP receiving parameter (setting 3) according to this, and receive the first lost PDCP of UE1 to receive SN and The corresponding HFN is sent to the UE2, and the second mode switching command is sent to the UE2, so that the UE2 retransmits the corresponding data on the link after the mode conversion, for example, starting from the first lost PDCP receiving SN, Pass all PDCP packets that have been sent.
- the eNB2 After receiving the above information sent by the UE2, the eNB2 performs processing similar to eNB1, for example, resetting the transmission parameters of its PDCP (setting 3), and receiving the first lost PDCP of the UE2 to receive the SN and The corresponding HFN is forwarded to the serving eNB of UE1, ie eNB1. After receiving the first lost PDCP receiving SN and corresponding HFN of UE2 sent by eNB2, eNB1 also resets its PDCP receiving parameter (setting 3) according to this, and sends UE2's PDCP status report and second to UE1.
- the mode switching command is such that UE1 retransmits the corresponding data on the mode-switched link according to the retransmission, for example, starting from the first lost PDCP receiving SN, and retransmitting all the data that has been transmitted.
- the UE can be converted from the D2D communication mode to the cellular communication mode, and all PDCP parameters are exchanged according to service requirements, thereby ensuring continuity of services.
- Embodiments 7 to 9 are applicable to the scenario of switching from the cellular communication mode shown in FIG. 2 to the D2D communication mode shown in FIG. 3, and are also applicable to the transition from the D2D communication mode shown in FIG. 4 to FIG.
- Embodiment 7 is a case where there is no interaction of PDCP parameters
- Embodiment 8 is a case where full PDCP parameters are exchanged
- Embodiment 9 is a case where partial PDCP parameters are interactive.
- the embodiment of the invention provides a communication mode conversion method, and the method is applied to an eNB.
- the method can be implemented by the method shown in FIG. 5. Referring to FIG. 5, the method includes:
- Step 501 The eNB determines a mode switching manner according to a predetermined policy.
- Step 502 If the mode switching mode is no PDCP parameter interaction, the eNB sends a first mode switching command to the UE of the D2D link, and resets all PDCP transmission parameters and PDCP receiving parameters to 0.
- the method in this embodiment is used to perform the conversion from the cellular communication mode to the D2D communication mode, and after the eNB sends the first mode conversion command to the UE according to the method of FIG. After the UE resets all of its PDCP transmission parameters and PDCP reception parameters to 0, the UE transmits data on the converted D2D link.
- FIG. 16 is a schematic diagram of information exchange between an eNB and a UE in this embodiment.
- the eNB when determining a mode switching mode in which no PDCP parameter interaction is used, the eNB sends a first mode switching command to UE1 and UE2, respectively. Reset its own PDCP transmit parameters and PDCP receive parameters to zero.
- UE1 and UE2 After receiving the first mode switching command sent by the eNB, UE1 and UE2 also reset their respective PDCP transmission parameters and PDCP receiving parameters to 0, thereby completing the UE1 and UE2 from the cellular communication mode to the D2D communication mode.
- the conversion can transfer data to each other on the converted D2D link.
- the transition from the cellular communication mode to the D2D communication mode can be realized, and the continuity of the service can be ensured.
- FIG. 17 is a flow chart of the method. Referring to Figure 17, the method includes:
- Step 1701 The eNB determines a mode switching manner according to a predetermined policy.
- step 501 of the step 1 is the same as that of the step 501 of the first embodiment, and the content thereof is incorporated herein, and details are not described herein again.
- Step 1702 If the mode switching mode is a full PDCP parameter interaction, the eNB sends a mode switching preparation command to the UE of the D2D link, so that the UE maintains its cellular link.
- the eNB When the eNB determines the full PDCP parameter interaction, the eNB sends a mode conversion preparation command to the UE it serves, so that the UE is ready to perform the conversion of the communication mode. After receiving the mode switching command sent by the eNB, the UE maintains its original cellular link to receive all the data on the cellular link.
- Step 1703 The eNB transmits data to the UE on a link before the communication mode transition until the core network data packet related to the D2D link is transmitted.
- the eNB further transmits the core network data packets related to the D2D link before the communication mode is switched.
- the transmission process and mode are the same as the existing methods, and will not be described here.
- Step 1704 The eNB sends a second mode switching command to the UE, so that the UE sends a next PDCP receiving SN and a corresponding HFN to its peer UE.
- the eNB may send a second mode switching command to the UE it serves to instruct the UE to perform mode switching.
- the UE receiving the second mode switching command sends its next PDCP receiving SN and the corresponding HFN to the opposite UE, so that the opposite UE sets its PDCP transmission parameters accordingly.
- the UE may send the foregoing information through a link before the mode switching, or may send the foregoing information through a link after the mode conversion, depending on the connection status of the link.
- Step 1705 The eNB sends a PDCP status report to the UE, so that the UE retransmits the PDCP data packet accordingly.
- the eNB In order to ensure the continuity of the service, the eNB also needs to send a PDCP status report to the UE it serves, so that the UE retransmits the PDCP data packet that has not been successfully received on the mode-switched link.
- the sequence between the step of transmitting the second mode switching command by the eNB to the UE served by the eNB and the step of transmitting the PDCP status report by the eNB to the UE served by the eNB is not limited. In order, these two steps can be combined.
- FIG. 18 is a schematic diagram of information exchange between the eNB and the UE in this embodiment.
- the eNB when determining a mode switching mode in which full PDCP parameter interaction is used, the eNB sends a mode conversion preparation command to UE1 and UE2. After receiving the mode conversion preparation command, UE1 and UE2 maintain their cellular links to receive data on the cellular link. At this time, the eNB continues to transmit data to UE1 and UE2 until the core network data packets related to the D2D link have been transmitted, and then the eNB transmits a second mode switching command to UE1 and UE2. In order to ensure continuity of services, the eNB also sends a PDCP status report to UE1 and UE2, respectively.
- UE1 and UE2 After receiving the second mode switching command, UE1 and UE2 send the next PDCP receiving SN and the corresponding HFN to the other party, so that the other party sets its PDCP transmission parameter accordingly. For example, UE1 receives the next PDCP sent by UE2. After receiving the SN and the corresponding HFN, resetting its PDCP transmission parameters to the next PDCP receiving SN and the corresponding HFN; likewise, after receiving the next PDCP receiving SN and the corresponding HFN sent by UE1, UE2 will The PDCP transmission parameters are reset to the next PDCP reception SN and the corresponding HFN. In addition, UE1 and UE2 also report retransmission of PDCP data packets that have not been successfully received according to the PDCP status report of the serving eNB, thereby ensuring continuity of services.
- the UE can be converted from the cellular communication mode to the D2D communication mode, or from the D2D mode to the D2D mode, and all PDCP parameters are exchanged according to the service requirement, thereby ensuring service continuity.
- Example 9 The embodiment of the present invention further provides a communication mode conversion method, and the method is applied to an eNB.
- the difference from the embodiment 8 is that only the PDCP parameters are exchanged in the embodiment, and the same content as the embodiment 8 is not repeatedly described.
- . 19 is a flow chart of the method. Referring to FIG. 19, the method includes:
- Step 1901 The eNB determines a mode switching manner according to a predetermined policy.
- Step 1902 If the mode switching mode is part of the PDCP parameter interaction, the eNB sends a mode switching preparation command to the UE of the D2D link, so that the UE maintains its cellular link.
- the eNB When determining the partial PDCP parameter interaction, the eNB sends a mode conversion preparation command to the UE it serves, so that the UE is ready to perform the conversion of the communication mode. After receiving the mode switching command sent by the eNB, the UE maintains its original cellular link to receive all the data on the cellular link.
- Step 1903 The eNB transmits data to the UE on a link before the communication mode transition until the core network data packet related to the D2D link is transmitted.
- Step 1904 The eNB sends a second mode switching command to the UE, so that the UE sends a next PDCP receiving SN and a corresponding HFN to its peer UE.
- the eNB may send a second mode switching command to the UE it serves to instruct the UE to perform mode switching.
- the UE receiving the second mode switching command sends its next PDCP receiving SN and the corresponding HFN to the opposite UE, so that the opposite UE sets its PDCP transmission parameters accordingly.
- the UE may send the foregoing information through the link before the mode switching, or may send the foregoing information through the link after the mode conversion, depending on the connection status of the link.
- Step 1905 The eNB sends the first lost PDCP receiving SN and the corresponding HFN to the UE, so that the UE retransmits the PDCP data packet accordingly.
- the eNB In order to ensure the continuity of the service, the eNB also needs to send the first lost PDCP receiving SN and the corresponding HFN to the UE it serves, so that the UE is based on the mode-switched link, from the first one.
- the lost PDCP receiving SN begins to retransmit all PDCP packets that have been sent.
- the step of the eNB sending the second mode switching command to the UE it serves is not limited, and the eNB sending the first lost PDCP receiving SN to the UE served by the eNB.
- the order between the steps of the corresponding HFN, these two steps can be combined.
- FIG. 20 is a schematic diagram of information exchange between an eNB and a UE in this embodiment.
- the eNB sends the first lost PDCP receiving SN and the corresponding HFN to UE1 and UE2, so that UE1 and UE2 are from the first
- a lost PDCP receives the SN and retransmits all the transmitted ones on the mode-switched link.
- PDCP packet The other steps are the same as those in FIG. 19, and the contents thereof are incorporated herein, and are not described herein again.
- the UE can be converted from the D2D communication mode to the cellular communication mode, and all PDCP parameters are exchanged according to service requirements, thereby ensuring continuity of services.
- Embodiments 10 to 12 are applicable to the scenario of switching from the cellular communication mode shown in Fig. 1 to the D2D communication mode shown in Fig. 3.
- Embodiment 10 is a case where no PDCP parameters are exchanged
- Embodiment 11 is a case where a full PDCP parameter is exchanged
- Embodiment 12 is a case where a part of PDCP parameters are interacted.
- the embodiment of the invention provides a communication mode conversion method, and the method is applied to an eNB.
- the method can be implemented by the method shown in FIG. 5. Referring to FIG. 5, the method includes:
- Step 501 The eNB determines a mode switching manner according to a predetermined policy.
- Step 502 If the mode switching mode is no PDCP parameter interaction, the eNB sends a first mode switching command to the UE of the D2D link, and resets all PDCP transmission parameters and PDCP receiving parameters to 0.
- each eNB since in the cellular communication mode, two eNBs serve two UEs respectively, each eNB sends the first mode switching command to the UE it serves. After each eNB transmits the first mode switching command to the respective serving UE according to the method of FIG. 5, each UE completes the cellular communication mode to the D2D communication after resetting all of its PDCP transmission parameters and PDCP receiving parameters to 0. Mode conversion and transfer of data on the converted D2D link.
- FIG. 21 is a schematic diagram of information exchange between the eNB and the UE in this embodiment.
- the eNB1 when determining a mode switching mode in which no PDCP parameter interaction is used, the eNB1 sends a first mode switching command to the UE1, and the eNB2 sends the message to the UE2.
- the first mode switching command at the same time, eNB1 and eNB2 reset the respective PDCP transmission parameters and PDCP reception parameters to zero.
- UE1 and UE2 After receiving the first mode switching command sent by the respective serving eNB, UE1 and UE2 also reset their respective PDCP transmission parameters and PDCP receiving parameters to 0, thereby completing the UE1 and UE2 from the cellular communication mode to The conversion of the D2D communication mode allows data to be transmitted to each other on the converted D2D link.
- the UE can be converted from the cellular communication mode to the D2D communication mode, and the interaction of the PDCP parameters is not performed according to the service requirement, thereby ensuring the continuity of the service.
- the embodiment of the invention further provides a communication mode conversion method, which is applied to an eNB, and Embodiment 8
- the eNB of the present embodiment forwards the successfully received PDCP data packet to the serving eNB of the opposite UE after transmitting the mode switching preparation command to the UE served by the eNB, and continues to transmit data to the UE until the The content of the core network data packet related to the D2D link and the data packet forwarded by other eNBs have been transmitted. Other content is the same as that of the embodiment 8, and details are not described herein again.
- FIG. 22 is a schematic diagram of information exchange between the eNB and the UE in this embodiment.
- each eNB when determining a mode switching mode in which full PDCP parameter interaction is adopted, similar to FIG. 18, each eNB sends a message to the UE it serves.
- the mode conversion preparation command, the data packet on the cellular link, and the second mode conversion command are reported in PDCP status.
- each eNB also forwards the successfully received PDCP data packet to the serving eNB of the opposite UE to avoid repeated transmission of data.
- each UE After receiving the second mode switching command sent by the serving eNB, each UE sends the next PDCP receiving SN and the corresponding HFN to the peer UE, where the UE can transmit through the original cellular link or through the conversion.
- Each UE After the D2D link is sent.
- Each UE resets its PDCP transmission parameters according to the received next PDCP receiving SN and the corresponding HFN, and retransmits the PDCP data packets that have not been successfully received according to the PDCP status report sent by the respective serving eNB. This ensures the continuity of the service after the communication mode is switched.
- the UE can be converted from the cellular communication mode to the D2D communication mode, and all PDCP parameters are exchanged according to service requirements, thereby ensuring continuity of services.
- the embodiment of the present invention further provides a communication mode conversion method, and the method is applied to an eNB.
- the difference from Embodiment 9 is that, in this embodiment, each UE is served by a different eNB.
- the processing procedure of each eNB is the same as that of the eNB of Embodiment 9, and the processing procedure of each UE is also the same as the processing procedure of the UE of Embodiment 9.
- FIG. 23 is a schematic diagram of information exchange between the eNB and the UE in this embodiment.
- each eNB when determining a mode switching mode in which part of the PDCP parameter interaction is used, similar to FIG. 20, each eNB sends a message to the UE it serves.
- each UE After receiving the second mode switching command sent by the serving eNB, each UE sends the next PDCP receiving SN and the corresponding HFN to the peer UE, where the UE can transmit through the original cellular link or through the conversion. After the D2D link is sent.
- Each UE resets its PDCP transmission parameters according to the received next PDCP receiving SN and the corresponding HFN, and receives the SN and the corresponding HFN according to the first lost PDCP sent by the respective serving eNB, in the mode-switched link. on, All received PDCP packets are retransmitted starting with the first lost PDCP receiving SN. This ensures continuity of the service after the communication mode is switched.
- the UE can be converted from the cellular communication mode to the D2D communication mode, and all PDCP parameters are exchanged according to service requirements, thereby ensuring continuity of services.
- the embodiment of the present invention further provides a communication mode conversion method of a UE applied to a D2D link, as described in Embodiment 13 below, because in Embodiment 1, In 4, 7, and 10, the method has been described, so in the following description, the same content will not be repeatedly described.
- An embodiment of the present invention provides a communication mode conversion method, where the method is applied to a UE in a D2D communication process, and the method is a UE side processing corresponding to the methods of Embodiments 1, 4, 7, and 10,
- the processing on the UE side and the information interaction with the eNB have been described, and the description of the same portions will not be repeated.
- FIG. 24 is a flowchart of the method. Referring to FIG. 24, the method includes: Step 2401: If the UE receives the first mode switching command sent by the eNB, the UE adds all PDCP transmission parameters and PDCP receiving parameters. Set to 0 and transfer data on the link after the communication mode is converted.
- the UE when receiving the first mode switching command sent by the eNB, the UE resets its PDCP transmission parameter and the PDCP receiving parameter to 0, thereby completing the conversion of the communication mode, because the interaction PDCP is not required.
- This method is used in the scenario of the parameters, thus ensuring continuity of the service.
- the embodiment of the present invention further provides a communication mode conversion method of a UE applied to a D2D link, as described in Embodiment 14 below, since in Embodiments 2 and 5, The method has been described, and therefore, the same contents will not be repeatedly described in the following description.
- An embodiment of the present invention provides a communication mode conversion method, where the method is applied to a UE in a D2D communication process, and the method is a UE-side process corresponding to the methods of Embodiments 2 and 5, because in Embodiment 2 In the case of 5, the processing on the UE side and the information interaction with the eNB have been described, and the description of the same contents will not be repeated.
- 25 is a flow chart of the method. Referring to FIG. 25, the method includes:
- Step 2501 If the UE receives the mode conversion preparation command sent by the eNB, the UE reports the PDCP transmission parameter, the PDCP receiving parameter, and the PDCP status report to the eNB.
- the eNB Using the PDCP transmission parameter of the UE as the downlink transmission parameter of the D2D communication peer UE of the UE, and using the PDCP receiving parameter of the UE as the uplink of the D2D communication peer UE with the UE Receiving parameters of the link, and transmitting the PDCP status report of the UE to the D2D communication peer UE of the UE.
- the eNB forwards the PDCP transmission parameter, the PDCP receiving parameter, and the PDCP status report of the UE to the D2D communication peer of the UE.
- the serving eNB of the UE And setting, according to the PDCP transmission parameter of the communication peer UE, the PDCP receiving parameter, the downlink PDCP transmission parameter and the uplink PDCP receiving parameter of the UE, and sending the PDCP status report of the opposite UE to the The UE.
- the UE may receive the second mode switching command sent by the eNB according to the D2D communication peer UE.
- the PDCP status report retransmits PDCP packets that were not successfully received on the link after the communication mode transition.
- the transition of the UE from the D2D communication mode to the cellular communication mode is implemented, and all PDCP parameters are exchanged according to service requirements, thereby ensuring continuity of services.
- the embodiment of the present invention further provides a communication mode conversion method of a UE applied to a D2D link, as described in Embodiment 15 below, since in Embodiments 3 and 6, The method has been described, and therefore, the same contents will not be repeatedly described in the following description.
- the embodiment of the present invention further provides a communication mode conversion method, where the method is applied to a UE in a D2D communication process, and the method is a UE side processing corresponding to the methods of Embodiments 3 and 6, because in the embodiment In 3 and 6, the processing on the UE side and the information interaction with the eNB have been described, and the description of the same contents will not be repeated.
- 26 is a flow chart of the method. Referring to FIG. 26, the method includes:
- Step 2601 If the UE receives the mode conversion preparation command sent by the eNB, the UE reports the first lost PDCP receiving SN and the corresponding HFN to the eNB.
- the eNB resets its PDCP transmission parameter and PDCP reception according to the first lost PDCP receiving SN of the UE and the corresponding HFN. And transmitting, by the UE, the first lost PDCP receiving SN and the corresponding HFN to the D2D communication peer UE of the UE, so that the peer UE retransmits the corresponding data.
- the eNB will The first lost PDCP receiving SN of the UE and the corresponding HFN are forwarded to the serving eNB of the communication peer UE, and the first lost PDCP receiving SN and the corresponding HFN reset according to the received communication peer UE
- the PDCP transmits and receives parameters, and sends the first lost PDCP receiving SN and the corresponding HFN of the communication peer UE to the UE, so that the UE retransmits the corresponding data.
- the UE may receive the second mode switching command sent by the eNB. Starting from the first lost PDCP receiving SN of the peer UE, all PDCP data packets that have been transmitted are retransmitted on the link after the communication mode transition.
- the UE can be converted from the D2D communication mode to the cellular communication mode, and only part of the PDCP parameters are exchanged according to service requirements, thereby ensuring continuity of services.
- the embodiment of the present invention further provides a communication mode conversion method of a UE applied to a D2D link, as described in Embodiment 16 below, due to Embodiment 8 In 9, 12-12, the method has been described, so in the following description, the same content will not be repeatedly described.
- the embodiment of the present invention further provides a communication mode conversion method, where the method is applied to a UE in a D2D communication process, and the method is a UE side process corresponding to the methods of Embodiments 8-9 and 11-12. Since the processing on the UE side and the information interaction with the eNB have been described in Embodiments 8-9 and 11-12, the description of the same contents will not be repeated.
- 27 is a flowchart of the method. Referring to FIG. 27, the method includes: Step 2701: If the UE receives a mode conversion preparation command sent by an eNB, the UE maintains a cellular link to receive data transmitted by the eNB. ;
- Step 2702 If the UE receives the second mode switching command, the UE sends the next PDCP receiving SN and the corresponding HFN to its peer UE.
- the UE sets the PDCP transmission parameter to the received next PDCP receiving SN and Corresponding HFN.
- the UE if the UE receives the PDCP status report from the serving eNB, the UE transmits the PDCP status report from the serving eNB, and the retransmission is not successfully received on the link after the communication mode transition. PDCP packet.
- the UE if the UE receives the first lost PDCP reception from the serving eNB The SN and the corresponding HFN, the UE starts to receive the SN from the first lost PDCP, and retransmits all the PDCP data packets that have been transmitted on the link after the communication mode transition.
- the UE can be converted from the cellular communication mode to the D2D communication mode, and only part of the PDCP parameters are exchanged according to the service requirement, thereby ensuring continuity of the service.
- the embodiment of the present invention further provides an eNB, as described in Embodiment 17 below, because the eNB solves the problem and the embodiments 1, 4, 7, and 10
- the method is similar, so the specific implementation can refer to the implementation of the methods of Embodiments 1, 4, 7, and 10, and the repeated description is not repeated.
- An embodiment of the present invention provides an eNB. 28 is a schematic diagram of the composition of the eNB. Referring to FIG. 28, the eNB includes:
- Determining unit 281 which determines a mode conversion mode according to a predetermined policy
- the processing unit 282 when the determining unit 281 determines that the mode switching mode is no PDCP parameter interaction, sends a first mode switching command to the UE of the D2D link, and resets all PDCP transmitting parameters and PDCP receiving parameters to 0.
- the communication mode can be converted under the premise of ensuring service continuity.
- the embodiment of the present invention further provides an eNB, as described in Embodiment 18 below. Since the principle of the eNB solving the problem is similar to the method of Embodiment 2, the specific implementation may refer to the implementation. The implementation of the method of Example 2 will not be repeated here.
- An embodiment of the present invention provides an eNB. 29 is a schematic diagram of the composition of the eNB. Referring to FIG. 29, the eNB includes:
- a determining unit 291 which determines a mode switching manner according to a predetermined policy
- a first sending unit 292 when the determining unit 291 determines that the mode switching mode is a full PDCP parameter interaction, sending a mode switching preparation command to the UE of the D2D link;
- a processing unit 293 when the eNB receives the PDCP transmission parameter, the PDCP receiving parameter, and the PDCP status report reported by the UE, using the PDCP transmission parameter as a downlink of the D2D communication peer UE with the UE a transmission parameter of the path, the PDCP receiving parameter is used as a receiving parameter of an uplink of the UE for D2D communication with the UE, and the PDCP status report is sent to the UE D2D communication peer UE;
- the second transmitting unit 294 sends a second mode switching command to the UE.
- the communication mode can be converted under the premise of ensuring service continuity.
- the embodiment of the present invention further provides an eNB, as described in Embodiment 19 below. Since the principle of the eNB solving the problem is similar to the method of Embodiment 3, the specific implementation may refer to the implementation. The implementation of the method of Example 3 will not be repeated here.
- FIG. 30 is a schematic diagram of the composition of the eNB.
- the eNB includes:
- a determining unit 301 which determines a mode switching manner according to a predetermined policy
- a first sending unit 302 when the determining unit 301 determines that the mode switching mode is part of the PDCP parameter interaction, sending a mode conversion preparation command to the UE of the D2D link;
- the processing unit 303 when the eNB receives the first lost PDCP receiving SN and the corresponding HFN reported by the UE, resets the SN according to the first lost PDCP receiving SN and the corresponding HFN Determining, by the D2D communication of the UE, the PDCP transmission parameter and the PDCP receiving parameter of the link between the peer UEs, and transmitting the first lost PDCP receiving SN and the corresponding HFN to the D2D communication peer UE of the UE;
- the second sending unit 304 sends a second mode switching command to the UE.
- the communication mode can be converted under the premise of ensuring service continuity.
- an embodiment of the present invention further provides an eNB, as described in Embodiment 20 below. Since the principle of the eNB solving the problem is similar to the method of Embodiment 5, the specific implementation may refer to the implementation. The implementation of the method of Example 5 will not be repeated here.
- FIG. 31 is a schematic structural diagram of the eNB. Referring to FIG. 31, the eNB includes:
- a first sending unit 312 when the determining unit 311 determines that the mode switching mode is a full PDCP parameter interaction, sending a mode switching preparation command to the UE of the D2D link; a first processing unit 313, when the eNB receives the PDCP transmission parameter, the PDCP receiving parameter, and the PDCP status report reported by the UE, forwarding the PDCP transmission parameter, the PDCP receiving parameter, and the PDCP status report to the UE
- the D2D communicates with the serving eNB of the peer UE.
- the eNB further includes:
- a second processing unit 3144 when the eNB receives the PDCP transmission parameter, the PDCP receiving parameter, and the PDCP status report of the peer UE sent by the serving eNB of the opposite UE, the PDCP of the opposite UE Transmitting a parameter as a transmission parameter of the downlink with the UE, using a PDCP receiving parameter of the peer UE as a receiving parameter of an uplink with the UE, and setting a PDCP status of the peer UE The report is sent to the UE;
- the second transmitting unit 315 sends a second mode switching command to the UE.
- the communication mode can be converted under the premise of ensuring service continuity.
- the embodiment of the present invention further provides an eNB, as described in Embodiment 21 below. Since the principle of the eNB solving the problem is similar to the method of Embodiment 6, the specific implementation may refer to the implementation. The implementation of the method of Example 6 will not be repeated here.
- FIG. 32 is a schematic diagram of the composition of the eNB.
- the eNB includes:
- the D2D of the UE communicates with the serving eNB of the peer UE.
- the eNB further includes:
- a second processing unit 324 when the eNB receives the first lost PDCP receiving SN and the corresponding HFN of the opposite UE sent by the serving eNB of the opposite UE, according to the peer UE
- the first lost PDCP receiving SN and the corresponding HFN reset their PDCP transmission parameters and PDCP receiving parameters of the link with the UE, and receive the first lost PDCP of the opposite UE and receive the SN and corresponding HFN Sent to the UE;
- the second transmitting unit 325 sends a second mode switching command to the UE.
- the communication mode can be converted under the premise of ensuring service continuity.
- the embodiment of the present invention further provides an eNB, as described in the following embodiment 22, because the eNB solves the problem and the embodiments 8-9, 11-12
- the method is similar, so the specific implementation can refer to the implementation of the methods of Embodiments 8-9 and 11-12, and the repeated description is not repeated.
- FIG. 33 is a schematic structural diagram of the eNB.
- the eNB includes:
- Determining unit 331 which determines a mode conversion mode according to a predetermined policy
- a first sending unit 332 when the determining unit 331 determines that the mode switching mode is a full PDCP parameter interaction or a partial PDCP parameter interaction, sending a mode switching preparation command to the UE of the D2D link, so that the UE maintains its cellular link;
- a first data transmission unit 333 which transmits data to the UE on a link before the communication mode transition until the core network data packet related to the D2D link is transmitted, or transmits data to the UE until The core network data packet related to the D2D link and the data packet forwarded by other eNBs are all transmitted;
- the second sending unit 334 sends a second mode switching command to the UE, so that the UE sends the UE to its peer UE. Sending the next PDCP to receive the SN and the corresponding HFN;
- the third sending unit 335 sends a PDCP status report or a first lost PDCP receiving SN and a corresponding HFN to the UE, so that the UE retransmits the PDCP data packet accordingly.
- the eNB further includes:
- the second data transmission unit 336 forwards the successfully received PDCP data packet to the serving eNB of the D2D communication peer UE of the UE when the mode conversion mode is full PDCP parameter interaction.
- the communication mode can be converted under the premise of ensuring service continuity.
- the embodiment of the present invention further provides a UE, as described in Embodiment 23 below. Since the principle of solving the problem by the UE is similar to the method of Embodiment 13, the specific embodiment may refer to the specific embodiment. The implementation of the method of Embodiment 13 will not be repeated.
- Example 23
- FIG. 34 is a schematic diagram of the composition of the UE.
- the UE includes:
- the processing unit 341 resets all PDCP transmission parameters and PDCP reception parameters to 0 when the UE receives the first mode switching command sent by the eNB, and transmits data on the link after the communication mode conversion.
- the UE in the embodiment of the present invention can implement the conversion of the communication mode under the premise of ensuring service continuity.
- the embodiment of the present invention further provides a UE, as described in Embodiment 24 below. Since the principle of the UE solving the problem is similar to the method of Embodiment 14, the specific embodiment may refer to the specific embodiment. The implementation of the method of Embodiment 14 will not be repeated.
- An embodiment of the present invention provides a UE.
- 35 is a schematic diagram of the composition of the UE. Referring to FIG. 35, the UE includes:
- the first sending unit 351 when the UE receives the mode switching preparation command sent by the eNB, reports the PDCP transmission parameter, the PDCP receiving parameter, and the PDCP status report to the eNB.
- the eNB uses the PDCP transmission parameter as a downlink transmission parameter of the D2D communication peer UE with the UE, and receives the PDCP.
- the parameter is used as a receiving parameter of the uplink of the peer UE with the D2D communication of the UE, and the PDCP status report is sent to the D2D communication peer UE of the UE.
- the eNB forwards the PDCP transmission parameter, the PDCP receiving parameter, and the PDCP status report to the serving eNB of the D2D communication peer UE of the UE.
- the PDCP transmission parameter of the opposite UE is used as the PDCP of the downlink with the UE. Transmitting a parameter, using a PDCP receiving parameter of the peer UE as a PDCP receiving parameter of the uplink with the UE, and transmitting a PDCP status report of the peer UE to the UE.
- the UE further includes:
- a second sending unit 352 when the UE receives the PDCP status report of the D2D communication peer UE, according to the PDCP status report of the D2D communication peer UE, retransmitting on the link after the communication mode transition PDCP packets that were not successfully received.
- the UE in the embodiment of the present invention can implement the conversion of the communication mode under the premise of ensuring service continuity.
- the embodiment of the present invention further provides a UE.
- the principle of the UE solving the problem is similar to the method of Embodiment 15, and therefore, the specific embodiment may refer to The implementation of the method of Embodiment 15 will not be repeated.
- An embodiment of the present invention provides a UE.
- 36 is a schematic diagram of the composition of the UE. Referring to FIG. 36, the UE includes:
- the first sending unit 361 when the UE receives the mode conversion preparation command sent by the eNB, reports the first lost PDCP receiving SN and the corresponding HFN to the eNB.
- the eNB If the UE belongs to the same eNB as the peer UE, the eNB resets the communication between the peer UE and the UE according to the first lost PDCP receiving SN of the UE and the corresponding HFN.
- the PDCP transmission parameter of the link and the PDCP receiving parameter, and the first lost PDCP receiving SN and the corresponding HFN are sent to the communication peer UE of the UE.
- the eNB forwards the first lost PDCP receiving SN of the UE and the corresponding HFN to the serving eNB of the communication peer UE of the UE. .
- the eNB After receiving the first lost PDCP receiving SN and the corresponding HFN of the opposite UE sent by the eNB of the opposite UE, the eNB resets the PDCP transmitting and receiving parameters of the link between the UE and the UE accordingly. And transmitting, to the UE, the first lost PDCP receiving SN of the communication peer UE and the corresponding HFN.
- the UE further includes:
- a second sending unit 362 where the UE receives the first lost UE of the D2D communication peer UE
- the PDCP When receiving the SN and the corresponding HFN, the PDCP starts to receive the SN from the first lost PDCP of the opposite UE, and retransmits all the PDCP data packets that have been transmitted on the link after the communication mode transition.
- the UE in the embodiment of the present invention can implement the conversion of the communication mode under the premise of ensuring service continuity.
- the embodiment of the present invention further provides a UE, as described in Embodiment 26 below. Since the principle of solving the problem is similar to the method of Embodiment 16, the specific embodiment may refer to the specific embodiment. The implementation of the method of Embodiment 16 will not be repeated.
- An embodiment of the present invention further provides a UE.
- 37 is a schematic diagram of the composition of the UE.
- the UE includes: The receiving unit 371, when the UE receives the mode conversion preparation command sent by the eNB, keeps the cellular link to receive the data transmitted by the eNB;
- the first sending unit 372 when the UE receives the second mode switching command, sends the next PDCP receiving SN and the corresponding HFN to the D2D communication peer UE of the UE.
- the UE further includes:
- the processing unit 373 when the UE receives the next PDCP receiving SN and the corresponding HFN sent by the opposite UE, sets the PDCP transmission parameter to the received PDCP receiving SN and the corresponding HFN.
- the UE further includes:
- a second sending unit 374 when the UE receives the PDCP status report from the serving eNB, retransmits the PDCP data that is not successfully received on the link after the communication mode transition according to the PDCP status report from the serving eNB. package.
- the UE further includes:
- a third sending unit 375 when the UE receives the first lost PDCP receiving SN from the serving eNB and the corresponding HFN, starting from the first lost PDCP receiving SN, after the communication mode is switched On the link, all PDCP packets that have been sent are retransmitted.
- the UE in the embodiment of the present invention can implement the conversion of the communication mode under the premise of ensuring service continuity.
- the embodiment of the present invention further provides a communication system, where the communication system includes the eNB described in Embodiment 17 and at least two UEs described in Embodiment 23; or, the communication system includes the embodiment 18 eNB and at least two UEs described in Embodiment 24; or, the communication system includes the eNB described in Embodiment 19 and at least two UEs described in Embodiment 25; or, the communication system includes Embodiment 20
- the embodiment of the present invention also provides a computer readable program, wherein when the program is executed in a base station, the program causes the computer to execute the communication mode conversion method described in Embodiments 1-12 in the base station.
- the embodiment of the present invention also provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the communication mode conversion method described in Embodiments 1-12 in a base station.
- An embodiment of the present invention further provides a computer readable program, wherein the program is executed in a terminal device
- the program causes the computer to execute the communication mode conversion method described in Embodiments 13-16 in the terminal device.
- the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the communication mode conversion method described in Embodiments 13-16 to be performed in a device in the computer.
- the above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software.
- the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
- Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like.
- the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.
Abstract
Description
Claims
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EP13882196.2A EP2988549A4 (en) | 2013-04-16 | 2013-04-16 | Communications mode switching method, apparatus and system |
KR1020157030712A KR101739679B1 (ko) | 2013-04-16 | 2013-04-16 | 통신 모드 전환 방법 및 장치와, 시스템 |
JP2016507965A JP6222344B2 (ja) | 2013-04-16 | 2013-04-16 | 通信モード切替方法、装置及びシステム |
US14/876,025 US20160029280A1 (en) | 2013-04-16 | 2015-10-06 | Method and apparatus of communication mode switch and system |
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CN104427489B (zh) * | 2013-08-29 | 2018-11-23 | 电信科学技术研究院 | 一种通信切换、建立方法及设备 |
KR20190075998A (ko) | 2016-11-03 | 2019-07-01 | 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 | 통신 모드를 전환하는 방법, 단말 설비와 네트워크 설비 |
CN111818630A (zh) * | 2019-07-12 | 2020-10-23 | 维沃移动通信有限公司 | 状态变量维护方法、装置及用户设备 |
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EP2988549A4 (en) | 2017-03-08 |
JP6222344B2 (ja) | 2017-11-01 |
KR101739679B1 (ko) | 2017-05-24 |
EP2988549A1 (en) | 2016-02-24 |
US20160029280A1 (en) | 2016-01-28 |
JP2016516380A (ja) | 2016-06-02 |
KR20150134412A (ko) | 2015-12-01 |
CN104969610A (zh) | 2015-10-07 |
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