CN105704641B - Device-to-device D2D data transmission method, device and D2D UE - Google Patents

Abstract

The present invention provides a kind of device-to-device D2D data transmission method, device and D2D UE, wherein, the PDCP head compression instruction information whether D2D sender of communications user equipment (UE) carries out PDCP compression processings to Packet Data Convergence Protocol PDCP protocol Data Unit PDU is used to indicate this method comprises: determining；And/or it is used to indicate the PDCP encryption indication information whether D2D sender of communications user equipment (UE) carries out PDCP encryption to Packet Data Convergence Protocol PDCP protocol Data Unit PDU；The PDCP compression instruction information and/or the PDCP encryption indication information are sent to D2D communication receiver UE, solve the problems, such as that recipient D2D UE can not correctly parse D2D communication data in the related technology, and then reached D2D communication receiver UE and obtained PDCP compression instruction information and/or the PDCP encryption indication information, it can correctly parse the effect of D2D communication data.

Description

Device-to-device D2D data transmission method, device and D2D UE

Technical field

The present invention relates to the communications fields, in particular to a kind of standby to equipment D2D data transmission method, device and D2D UE。

Background technique

With the development of wireless multimedia service, demand of the people to high data rate and user experience is growing, from And high requirement is proposed to the power system capacity and covering of conventional cellular network.Another aspect social networks, short distance data are total Enjoy, the prevalence of the applications such as local advertising makes interested persons or things near the right solution of people and communicates, for example, neighbouring The demand of service (Proximity Services, referred to as PS) gradually increases.It is traditional based on the cellular network of cell in height There are apparent limitations in terms of the support of data rate and adjacent service represents future communications under this requirement background Device-to-device (Device-to-Device, referred to as D2D) technology that technology develops new direction is come into being.D2D technology Using the burden that can mitigate cellular network the battery power consumption for reducing user equipment, improves data rate, and improves network base The robustness of Infrastructure meets the requirement of above-mentioned high data rate traffic and adjacent service well.

D2D technology can work in authorized spectrum band or unauthorized frequency range, allow multiple user equipmenies for supporting D2D function (i.e. D2D user equipment, D2D User Equipment, D2D UE) is having network infrastructure or without the feelings of network infrastructure / direct communication is directly found under condition.Fig. 1 is the application model schematic diagram of D2D technology in the related technology, as shown in Figure 1, There are mainly three types of the application scenarios of D2D:

1) UE1 and UE2 carries out data interaction under the covering of cellular network, and user face data is set without network foundation It applies, such as the mode 1 of Fig. 1；

2) in weak/UE relay transmission without overlay area, mode 2 as shown in figure 1, the UE4 for allowing signal quality poor is logical Crossing nearby has the UE3 of the network coverage to be communicated with network, and operator can be helped to spread over, improve capacity；

3) in the case where earthquake or emergency cellular network cisco unity malfunction occurs, allow equipment room directly logical Letter, mode 3, UE5 as shown in figure 1, control plane and user face all carry out a jump without network infrastructure between UE6 and UE7 Or the data communication of multi-hop.

D2D technology generally includes D2D discovery technique and the D2D communication technology:

1) D2D discovery technique refer to for judge/determine between two or more D2D user equipmenies it is mutually adjacent (such as Can carry out within D2D direct communications range) or for judging/determining the first user equipment adjacent to the skill of second user equipment Art.

2) the D2D communication technology refers to that part or all of communication data can not pass through network foundation between D2D user equipment Facility and the technology directly communicated.

D2D UE requires to obtain corresponding radio resource first, either before carrying out D2D discovery or D2D communication , all there is the two kinds of resources method of salary distribution in D2D discovery or the D2D communication resource, i.e., be that UE distributes proprietary resource (first by base station Resource distribution mode, also known as mode 1) or resource acquisition competition-based (the Secondary resource method of salary distribution, also known as mode 2) D2D discovery/communication is carried out.The first resource method of salary distribution is that D2D UE distribution is suitable according to the request of D2D UE by base station D2D resource, this mode are only used for the D2D UE being located in cellular network covering.And the Secondary resource method of salary distribution is usually by base It stands or system pre-allocates a D2D resource pool, participate in D2D discovery/communication D2D UE and monitor the resource pool, or pass through competition Mode obtain D2D send resource, this mode be mainly used for cellular network covering outside D2D UE, it can also be used to cellular network D2D UE in covering.For the D2D UE in cellular network covering, the D2D competitive resource of institute's serving cell configuration can be used Pond.For the D2D UE outside cellular network covering, the D2D competitive resource pond of pre-configuration may be used.

In the related art, the UE for carrying out D2D communication is moved to the cellular network area of coverage from cellular network covering is outer Under the scene in domain, UE once detects that it is in certain MPS process of cellular network, and the cell supports D2D communication, then stops Only use the pre-configuration D2D resource under frequency point identical as the cell.UE is only broadcasting (System from the system information of the cell Information Broadcast, referred to as SIB) in obtain mode2 resource (if present), or establish RRC connection After obtaining mode1/mode2D2D resource by proprietary signaling afterwards, it can just restart the transmission of D2D communication data.Therefore, In UE under above-mentioned scene will undergo the D2D communication disruption of a period of time, this will affect D2D business continuance, especially for one A little delay sensitive business, such as VOIP business.

In addition, base station need to be carried as sender and recipient UE configuration for each by RRC signaling in LTE system PDCP layer parameter, for example, PDCP compression relevant parameters.And in D2D communication, the communication between UE is not needed through base station, special For safety pin to broadcast communication scene, base station may not even be aware which UE is recipient UE, can not be D2D UE configuration by RRC signaling Corresponding radio bearer parameter.In this case, recipient D2D UE cannot obtain these D2D radio bearer PDCP layer parameters, D2D communication data can not correctly be parsed.

Therefore, there is D2D service disconnection and recipient D2D UE in the related art can not correctly parse D2D communication The problem of data.

Summary of the invention

The present invention provides a kind of device-to-device D2D data transmission method, device and D2D UE, at least the relevant technologies In, solution has D2D service disconnection and recipient D2D UE in the related technology can not correctly parse asking for D2D communication data Topic.

According to an aspect of the present invention, a kind of device-to-device D2D data transmission method is provided, comprising: determination is used for Indicate whether D2D sender of communications user equipment (UE) carries out PDCP to Packet Data Convergence Protocol PDCP protocol Data Unit PDU The PDCP head compression instruction information of head compression processing；And/or be used to indicate D2D sender of communications user equipment (UE) whether to point Group data convergence protocol PDCP protocol Data Unit PDU carries out the PDCP encryption indication information of PDCP encryption；It is communicated to D2D Recipient UE sends the PDCP compression instruction information and/or the PDCP encryption indication information.

At least one preferably, in the following manner, determine that the PDCP compression instruction information and/or the PDCP add Close instruction information: the PDCP compression instruction information and/or PDCP encryption instruction are determined according to D2D characteristics of communications traffic Information and；The PDCP compression instruction letter is determined according to the configuration information that the D2D sender of communications UE own base station is sent Breath and/or the PDCP encryption indication information；The configuration sent according to the affiliated ProSe server of the D2D sender of communications UE Information determines the PDCP compression instruction information and/or the PDCP encryption indication information；According to the D2D sender of communications The configuration information that the affiliated application server AS of UE is sent determines that the PDCP compression instruction information and/or PDCP encryption refer to Show information.

Preferably, by the way that the PDCP compression is indicated that information and/or the PDCP encryption indication information carry The mode of PDCP PDU data packet sends the PDCP compression instruction information and/or the PDCP to D2D communication receiver UE Encryption indication information.

Preferably, by the way that the PDCP compression is indicated that information and/or the PDCP encryption indication information are carried in institute The mode for stating the header part PDCP in PDCP PDU data packet sends the PDCP compression to D2D communication receiver UE and refers to Show information and/or the PDCP encryption indication information.

Preferably, the header part PDCP in the PDCP PDU data packet further includes at least one following information: maxCID、profiles。

Preferably, including following one: by the way that the PDCP compression is indicated information and/or PDCP encryption instruction Information carries the mode in the PDU type field of the header part PDCP in the PDCP PDU data packet, to D2D communications reception Square UE sends the PDCP compression instruction information and/or the PDCP encryption indication information；By the way that described PDCP is compressed Indicate that information and/or the PDCP encryption indication information carry the peace of the header part PDCP in the PDCPPDU data packet Mode in full information instructions field sends the PDCP compression instruction information and/or the PDCP to D2D communication receiver UE Encryption indication information；By the way that the PDCP compression is indicated that information and/or the PDCP encryption indication information are carried described Mode in the head compression instructions field of the header part PDCP in PDCP PDU data packet and/or in encryption instructions field, it is logical to D2D Believe that recipient UE sends the PDCP compression instruction information and/or the PDCP encryption indication information.

Preferably, the PDU type field of the header part PDCP is used to indicate the type of the PDCP PDU data packet, institute The value for stating type includes at least one of: Internet Protocol IP packet, Address Resolution Protocol ARP packet, the IP compressed using head Packet, the IP packet compressed without using head.

According to another aspect of the present invention, a kind of device-to-device D2D data transmission method is provided, comprising: receive and use Whether Packet Data Convergence Protocol PDCP protocol Data Unit PDU is carried out in instruction D2D sender of communications user equipment (UE) The PDCP head compression instruction information of PDCP compression processings；And/or whether it is used to indicate D2D sender of communications user equipment (UE) The PDCP encryption indication information of PDCP encryption is carried out to Packet Data Convergence Protocol PDCP protocol Data Unit PDU；Foundation The received PDCP compressions instruction information and/or the PDCP encryption indication information carry out PDCP layers of processing.

Preferably, it is carried out according to the received PDCP compression instruction information and/or the PDCP encryption indication information PDCP layers of processing include: to indicate the D2D sender of communications UE to the PDCP PDU in PDCP compression instruction information It has carried out PDCP compressions and/or the PDCP encryption indication information indicates the D2D sender of communications UE to the PDCP In the case that PDU has carried out PDCP encryption, the PDCPPDU received is carried out at head decompression and/or decryption Reason；Indicate that the D2D sender of communications UE does not carry out the PDCP PDU in PDCP compression instruction information PDCP compressions and/or the PDCP encryption indication information indicate the D2D sender of communications UE not to the PDCP PDU In the case where carrying out PDCP encryption, abandon carrying out at head decompression and/or decryption the PDCP PDU received Reason.

Preferably, by the way that the PDCP compression is indicated that information and/or the PDCP encryption indication information carry The mode of PDCP PDU data packet receives the PDCP compression instruction information and/or the PDCP encryption indication information.

Preferably, by the way that the PDCP compression is indicated that information and/or the PDCP encryption indication information are carried in institute The mode for stating the header part PDCP in PDCP PDU data packet receives PDCP compression instruction information and/or described PDCP encryption indication information.

Preferably, the header part PDCP in the PDCP PDU data packet further includes at least one following information: maxCID、profiles。

Preferably, including following one: by the way that the PDCP compression is indicated information and/or PDCP encryption instruction Information carries the mode in the PDU type field of the header part PDCP in the PDCP PDU data packet, receives described PDCP compression instruction information and/or the PDCP encryption indication information；By by the PDCP compression indicate information and/or The PDCP encryption indication information carries the security information instructions field of the header part PDCP in the PDCP PDU data packet Interior mode sends the PDCP compression instruction information and/or PDCP encryption instruction letter to D2D communication receiver UE Breath；By the way that the PDCP compression is indicated that information and/or the PDCP encryption indication information are carried in the PDCP PDU number According to the mode in the PDU type field of the header part PDCP in packet and/or in encryption instructions field, the PDCP compression is received Indicate information and/or the PDCP encryption indication information.

Preferably, the PDU type field of the header part PDCP is used to indicate the type of the PDCP PDU data packet, The value of the type includes at least one of: Internet Protocol IP packet, uses head compression at Address Resolution Protocol ARP packet IP packet, the IP packet compressed without using head.

Also one side according to the present invention, provides a kind of device-to-device D2D data transmission method, comprising: determine small The device-to-device D2D resource pool for abnormal conditions in sound zone system message；It is carried out according to the D2D resource pool determined The transmission of D2D data.

Preferably, before carrying out the transmission of D2D data according to the D2D resource pool determined, further includes: detect progress The D2D user equipment (UE) of D2D data transmission is in the coverage area of cellular cell.

Preferably, the D2D UE be in the coverage area of cellular cell meet for cell locating for the D2D UE it is small Area selects S criterion, alternatively, the D2D UE determines that cell locating for the D2D UE is suitable cell.

Preferably, after carrying out the transmission of D2D data according to the D2D resource pool determined, further includes: judge whether to connect Receive the wireless spread-spectrum technology RRC reconfiguration message including D2D resource allocation information；In the case where the judgment result is yes, stop Only using the D2D resource pool for abnormal conditions in system message.

According to an aspect of the present invention, a kind of device-to-device D2D data transmission device is provided, comprising: first determines Whether module is used to indicate D2D sender of communications user equipment (UE) to Packet Data Convergence Protocol PDCP agreement number for determination The PDCP head compression instruction information of PDCP compression processings is carried out according to unit PDU；And/or it is used to indicate D2D sender of communications use Whether family equipment UE refers to the Packet Data Convergence Protocol PDCP protocol Data Unit PDU PDCP encryption for carrying out PDCP encryption Show information；Sending module, for sending the PDCP compression instruction information and/or the PDCP to D2D communication receiver UE Encryption indication information.

Preferably, first determining module is also used at least one in the following manner, determine the PDCP compression Instruction information and/or the PDCP encryption indication information: the PDCP compression instruction letter is determined according to D2D characteristics of communications traffic Breath and/or the PDCP encryption indication information；It is determined according to the configuration information that the D2D sender of communications UE own base station is sent The PDCP compression instruction information and/or the PDCP encryption indication information；According to belonging to the D2D sender of communications UE The configuration information that ProSe server is sent determines the PDCP compression instruction information and/or the PDCP encryption indication information； The PDCP compression instruction letter is determined according to the configuration information that the affiliated application server AS of the D2D sender of communications UE is sent Breath and/or the PDCP encryption indication information.

Preferably, the sending module is also used to by the way that the PDCP compression is indicated that information and/or the PDCP add Close instruction information carries the mode in PDCP PDU data packet, sends the PDCP compression instruction to D2D communication receiver UE Information and/or the PDCP encryption indication information.

Preferably, the sending module is also used to by the way that the PDCP compression is indicated that information and/or the PDCP add Close instruction information carries the mode of the header part PDCP in the PDCP PDU data packet, sends out to D2D communication receiver UE Send the PDCP compression instruction information and/or the PDCP encryption indication information.

Preferably, the header part PDCP in the PDCP PDU data packet further includes at least one following information: maxCID、profiles。

Preferably, the sending module, is also used to following one: by by the PDCP compression indicate information and/or The PDCP encryption indication information carries the side in the PDU type field of the header part PDCP in the PDCP PDU data packet Formula sends the PDCP compression instruction information and/or the PDCP encryption indication information to D2D communication receiver UE；Pass through The PDCP compression is indicated that information and/or the PDCP encryption indication information carry in the PDCP PDU data packet Mode in the security information instructions field of the header part PDCP sends the PDCP compression instruction to D2D communication receiver UE Information and/or the PDCP encryption indication information；By the way that the PDCP compression is indicated that information and/or PDCP encryption refer to Show that information carries in the head compression instructions field of the header part PDCP in the PDCPPDU data packet and/or encrypt instructions field Interior mode sends the PDCP compression instruction information and/or PDCP encryption instruction letter to D2D communication receiver UE Breath.

Preferably, the PDU type field of the header part PDCP is used to indicate the type of the PDCP PDU data packet, institute The value for stating type includes at least one of: Internet Protocol IP packet, Address Resolution Protocol ARP packet, the IP compressed using head Packet, the IP packet compressed without using head.

According to another aspect of the present invention, a kind of device-to-device D2D data transmission device is provided, comprising: receive mould Whether block is used to indicate D2D sender of communications user equipment (UE) to Packet Data Convergence Protocol PDCP protocol data for receiving Unit PDU carries out the PDCP head compression instruction information of PDCP compression processings；And/or it is used to indicate D2D sender of communications user Whether equipment UE encrypts instruction to the Packet Data Convergence Protocol PDCP protocol Data Unit PDU PDCP for carrying out PDCP encryption Information；Processing module, for according to the received PDCP compression indicate information and/or the PDCP encryption indication information into PDCP layers of row processing.

Preferably, the processing module includes: processing unit, described in indicating in PDCP compression instruction information D2D sender of communications UE has carried out PDCP compressions to the PDCP PDU and/or the PDCP encryption indication information indicates institute It states in the case that D2D sender of communications UE carried out PDCP encryption to the PDCP PDU, to the PDCP PDU received Carry out head decompression and/or decryption processing；Unit is abandoned, described in indicating in PDCP compression instruction information D2D sender of communications UE has not carried out PDCP compressions to the PDCP PDU and/or the PDCP encryption indication information refers to In the case where showing that the D2D sender of communications UE does not carry out PDCP encryption to the PDCP PDU, abandon to receiving PDCP PDU carry out head decompression and/or decryption processing.

Preferably, the receiving module is also used to by the way that the PDCP compression is indicated that information and/or the PDCP add Close instruction information carries the mode in PDCP PDU data packet, receives the PDCP compression and indicates information and/or described PDCP encryption indication information.

Preferably, the receiving module is also used to by the way that the PDCP compression is indicated information and/or the PDCP Encryption indication information carries the mode of the header part PDCP in the PDCP PDU data packet, receives the PDCP pressure Contracting instruction information and/or the PDCP encryption indication information.

Preferably, the header part PDCP in the PDCP PDU data packet further includes at least one following information: maxCID、profiles。

Preferably, the receiving module, is also used to following one: by by the PDCP compression indicate information and/or The PDCP encryption indication information carries the side in the PDU type field of the header part PDCP in the PDCP PDU data packet Formula receives the PDCP compression instruction information and/or the PDCP encryption indication information；By the way that described PDCP is compressed Indicate that information and/or the PDCP encryption indication information carry the peace of the header part PDCP in the PDCPPDU data packet Mode in full information instructions field sends the PDCP compression instruction information and/or the PDCP to D2D communication receiver UE Encryption indication information；By the way that the PDCP compression is indicated that information and/or the PDCP encryption indication information are carried described Mode in the PDU type field of the header part PDCP in PDCP PDU data packet and/or in encryption instructions field receives described PDCP compression instruction information and/or the PDCP encryption indication information.

Preferably, the PDU type field of the header part PDCP is used to indicate the type of the PDCP PDU data packet, institute The value for stating type includes at least one of: Internet Protocol IP packet, Address Resolution Protocol ARP packet, the IP compressed using head Packet, the IP packet compressed without using head.

Also one side according to the present invention, provides a kind of device-to-device D2D data transmission device, comprising: second really Cover half block, for determining the device-to-device D2D resource pool for abnormal conditions in cell system message；Transmission module is used According to the D2D resource pool progress D2D data transmission determined.

Preferably, the device further include: detection module, for detecting at the D2D user equipment for carrying out the transmission of D2D data In in the coverage area of cell.

Preferably, the D2D UE be in the coverage area of cellular cell meet for cell locating for the D2D UE it is small Area selects S criterion, alternatively, the D2D UE determines that cell locating for the D2D UE is suitable cell.

Preferably, device further include: judgment module is received for judging whether including D2D resource allocation information Wireless spread-spectrum technology RRC reconfiguration message；Stopping modular, for the judging result of the judgment module be in the case where, Stop using the D2D resource pool for abnormal conditions in system message.

In accordance with a further aspect of the present invention, a kind of device-to-device D2D user equipment (UE), including any of the above-described are provided The device.

Through the invention, whether D2D sender of communications user equipment (UE) is used to indicate to packet data convergence using determination Agreement PDCP protocol Data Unit PDU carries out the PDCP head compression instruction information of PDCP compression processings；And/or it is used to indicate Whether D2D sender of communications user equipment (UE) carries out PDCP encryption to Packet Data Convergence Protocol PDCP protocol Data Unit PDU The PDCP encryption indication information of processing；The PDCP compression, which is sent, to D2D communication receiver UE indicates information and/or described PDCP encryption indication information solves the problems, such as that recipient D2D UE can not correctly parse D2D communication data in the related technology, into And D2D communication receiver UE is reached and has obtained PDCP compression instruction information and/or the PDCP encryption indication information, Neng Gouzheng The really effect of parsing D2D communication data.

Detailed description of the invention

The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:

Fig. 1 is the application model schematic diagram of D2D technology in the related technology；

Fig. 2 is the flow chart of device-to-device D2D data transmission method one according to an embodiment of the present invention；

Fig. 3 is the flow chart of device-to-device D2D data transmission method two according to an embodiment of the present invention；

Fig. 4 is the flow chart of device-to-device D2D data transmission method three according to an embodiment of the present invention；

Fig. 5 is the structural block diagram of device-to-device D2D data transmission device one according to an embodiment of the present invention；

Fig. 6 is the structural block diagram of device-to-device D2D data transmission device two according to an embodiment of the present invention；

Fig. 7 is the preferred of processing module 64 in device-to-device D2D data transmission device two according to an embodiment of the present invention Structural block diagram；

Fig. 8 is the structural block diagram of device-to-device D2D data transmission device three according to an embodiment of the present invention；

Fig. 9 is the preferred structure block diagram of device-to-device D2D data transmission device three according to an embodiment of the present invention；

Figure 10 is the preferred structure block diagram two of device-to-device D2D data transmission device three according to an embodiment of the present invention；

Figure 11 is the structural block diagram of D2D UE according to an embodiment of the present invention；

Figure 12 is the flow chart of preferred embodiment one according to the present invention；

Figure 13 is D2D communication PDCP PDU data packet form schematic diagram according to an embodiment of the present invention；

Figure 14 is the flow chart of preferred embodiment two according to the present invention；

Figure 15 is schematic diagram of a scenario according to the preferred embodiment of the invention；

Figure 16 is the method schematic diagram of preferred embodiment three according to the present invention.

Specific embodiment

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and in combination with Examples.It should be noted that not conflicting In the case of, the features in the embodiments and the embodiments of the present application can be combined with each other.

A kind of device-to-device D2D data transmission method is provided in the present embodiment, and Fig. 2 is according to embodiments of the present invention Device-to-device D2D data transmission method one flow chart, as shown in Fig. 2, the process includes the following steps:

Whether step S202, determination are used to indicate D2D sender of communications user equipment (UE) to Packet Data Convergence Protocol PDCP protocol Data Unit PDU carries out the PDCP head compression instruction information of PDCP compression processings；And/or it is used to indicate D2D and leads to Believe whether sender's user equipment (UE) carries out PDCP encryption to Packet Data Convergence Protocol PDCP protocol Data Unit PDU PDCP encryption indication information；PDCP compression instruction information and/or PDCP encryption instruction letter are sent to D2D communication receiver UE Breath；

Step S204 sends PDCP compression instruction information and/or PDCP encryption instruction letter to D2D communication receiver UE Breath.

Through the above steps, D2D sender of communications sends the use that the D2D sender of communications determines to D2D communication receiver Whether Packet Data Convergence Protocol PDCP protocol Data Unit PDU is carried out in instruction D2D sender of communications user equipment (UE) The PDCP head compression instruction information of PDCP compression processings；And/or whether it is used to indicate D2D sender of communications user equipment (UE) The PDCP encryption indication information of PDCP encryption is carried out to Packet Data Convergence Protocol PDCP protocol Data Unit PDU, is solved The problem of in the related technology recipient D2D UE can not correctly parse D2D communication data, and then reached D2D communication receiver UE obtains PDCP compression instruction information and/or PDCP encryption indication information, can correctly parse the effect of D2D communication data.

Whether determination is used to indicate D2D sender of communications user equipment (UE) to Packet Data Convergence Protocol PDCP protocol data When unit PDU carries out the PDCP head compression instruction information and/or PDCP encryption indication information of PDCP compression processings, it can use Various ways, for example, can at least one in the following manner: determining PDCP compressions instructions according to D2D characteristics of communications traffic Information and/or PDCP encryption indication information；PDCP head is determined according to the configuration information that D2D sender of communications UE own base station is sent Compression instruction information and/or PDCP encryption indication information；Matched according to what the affiliated ProSe server of D2D sender of communications UE was sent Confidence breath determines PDCP compression instruction information and/or PDCP encryption indication information；It is applied according to belonging to D2D sender of communications UE The configuration information that server A S is sent determines PDCP compression instruction information and/or PDCP encryption indication information.

It can also when sending PDCP compression instruction information and/or PDCP encryption indication information to D2D communication receiver UE To use various ways, for example, can be by the way that PDCP compressions be indicated that information and/or PDCP encryption indication information carry The mode of PDCP PDU data packet sends PDCP compression instruction information and/or PDCP encryption instruction to D2D communication receiver UE Information.

It preferably, can be by the way that PDCP compressions be indicated that information and/or PDCP encryption indication information are carried in PDCPPDU The mode of the header part PDCP in data packet sends PDCP compression instruction information and/or PDCP to D2D communication receiver UE Encryption indication information.Wherein, the header part PDCP in above-mentioned PDCP PDU data packet can also include following information at least it One: maxCID, profiles.

More preferably, by the way that PDCP compressions are indicated that information and/or PDCP encryption indication information are carried in PDCPPDU number According to the mode of the header part PDCP in packet, PDCP compression instruction information are sent to D2D communication receiver UE and/or PDCP adds It, can be by the way that PDCP compressions be indicated that information and/or PDCP encryption indication information are carried in PDCP PDU when close instruction information Mode in the PDU type field of the header part PDCP in data packet sends PDCP compression instructions to D2D communication receiver UE Information and/or PDCP encryption indication information；Or by the way that PDCP compressions are indicated that information and/or PDCP encryption indication information are taken Mode of the band in the security information instructions field of the header part PDCP in PDCP PDU data packet, to D2D communication receiver UE Send PDCP compression instruction information and/or PDCP encryption indication information；Can also by by PDCP compressions indicate information and/ Or PDCP encryption indication information carries in the head compression instructions field of the header part PDCP in PDCP PDU data packet and/or adds Mode in close instructions field sends PDCP compression instruction information and/or PDCP encryption instruction letter to D2D communication receiver UE Breath.

Wherein, the PDU type field of the above-mentioned header part PDCP is used to indicate the type of PDCP PDU data packet, and type takes Value may include at least one of: Internet Protocol IP packet, the IP packet compressed using head, is not made Address Resolution Protocol ARP packet The IP packet compressed with head.

In the present embodiment, a kind of device-to-device D2D data transmission method is additionally provided, Fig. 3 is real according to the present invention The flow chart for applying the device-to-device D2D data transmission method two of example, as shown in figure 3, the process includes the following steps:

Whether step S302, reception are used to indicate D2D sender of communications user equipment (UE) to Packet Data Convergence Protocol PDCP protocol Data Unit PDU carries out the PDCP head compression instruction information of PDCP compression processings；And/or it is used to indicate D2D and leads to Believe whether sender's user equipment (UE) carries out PDCP encryption to Packet Data Convergence Protocol PDCP protocol Data Unit PDU PDCP encryption indication information；

Step S304 indicates that information and/or PDCP encryption indication information carry out PDCP layers according to received PDCP compression Processing.

Through the above steps, the D2D communication that is used to indicate that D2D communication receiver receives that D2D sender of communications determines is sent Whether square user equipment (UE) carries out the PDCP of PDCP compression processings to Packet Data Convergence Protocol PDCP protocol Data Unit PDU Head compression instruction information；And/or whether D2D sender of communications user equipment (UE) is used to indicate to Packet Data Convergence Protocol PDCP protocol Data Unit PDU carries out the PDCP encryption indication information of PDCP encryption, according to the PDCP compression instruction letter Breath and/or PDCP encryption indication information carry out PDCP layers of processing, and solving recipient D2D UE in the related technology can not correctly solve The problem of analysing D2D communication data, and then reached D2D communication receiver UE and obtained PDCP compression instruction information and/or PDCP Encryption indication information can correctly parse the effect of D2D communication data.

Preferably, indicate that information and/or PDCP encryption indication information carry out at PDCP layers according to received PDCP compression Reason include: PDCP compression instruction information instruction D2D sender of communications UE to PDCP PDU carried out PDCP compression with/ Or in the case of PDCP encryption indication information instruction D2D sender of communications UE has carried out PDCP encryption to PDCP PDU, docking The PDCP PDU received carries out head decompression and/or decryption processing；In PDCP compression instruction information instruction D2D communications Sender UE has not carried out PDCP compressions to PDCP PDU and/or PDCP encryption indication information indicates D2D sender of communications In the case that UE does not carry out PDCP encryption to PDCP PDU, abandon carrying out head decompression to the PDCP PDU received Processing and/or decryption processing.

When receiving PDCP compression instruction information and/or PDCP encryption indication information, various ways can be used, for example, Can in such a way that PDCP compressions being indicated to, information and/or PDCP encryption indication information are carried in PDCP PDU data packet, Receive PDCP compression instruction information and/or PDCP encryption indication information.

Preferably, by the way that PDCP compressions are indicated that information and/or PDCP encryption indication information are carried in PDCPPDU number It, can be by the way that PDCP be pressed when receiving PDCP compression instruction information and/or PDCP encryption indication information according to the mode of packet Contracting instruction information and/or PDCP encryption indication information carry the mode of the header part PDCP in PDCP PDU data packet, connect Receive PDCP compression instruction information and/or PDCP encryption indication information.Wherein, the packet header PDCP in the PDCP PDU data packet Part can also include at least one following information: maxCID, profiles.

Preferably, by the way that PDCP compressions are indicated that information and/or PDCP encryption indication information are carried in PDCPPDU number It can when receiving PDCP compression instruction information and/or PDCP encryption indication information according to the mode of the header part PDCP in packet By the way that PDCP compression instruction information and/or PDCP encryption indication information are carried the PDCP packet in PDCP PDU data packet Mode in the PDU type field on head point receives PDCP compression instruction information and/or PDCP encryption indication information；Or By the way that PDCP compression instruction information and/or PDCP encryption indication information are carried the packet header PDCP in PDCP PDU data packet Mode in partial security information instructions field sends PDCP compression instruction information and/or PDCP to D2D communication receiver UE Encryption indication information；It can also be by the way that PDCP compressions be indicated that information and/or PDCP encryption indication information are carried in PDCP Mode in the PDU type field of the header part PDCP in PDU data packet and/or in encryption instructions field, receives PDCP pressures Contracting instruction information and/or PDCP encryption indication information.

Wherein, the PDU type field of the header part PDCP is used to indicate the type of PDCP PDU data packet, the value of type May include at least one of: Internet Protocol IP packet, the IP packet compressed using head, is not used Address Resolution Protocol ARP packet The IP packet of head compression.

In the present embodiment, a kind of device-to-device D2D data transmission method is additionally provided, Fig. 4 is real according to the present invention The flow chart for applying the device-to-device D2D data transmission method three of example, as shown in figure 4, the process includes the following steps:

Step S402 determines the device-to-device D2D resource pool for abnormal conditions in cell system message；

Step S404 carries out the transmission of D2D data according to the D2D resource pool determined.

Through the above steps, the D2D resource pool that abnormal conditions are used in cell system message is used for the transmission of D2D data, Relative in the related technology, D2D communicates UE and is moved under the scene of cellular network coverage area by cellular network covering is outer, causes The problem of D2D communication service is interrupted, and D2D service disconnection in the related technology is solved at least, is effectively promoted user experience.

Before carrying out the transmission of D2D data according to the D2D resource pool determined, further includes: detect and carry out the transmission of D2D data D2D user equipment (UE) be in the coverage area of cellular cell.Wherein, it should be noted that D2DUE is in cellular cell Meet cell in coverage area for cell locating for D2D UE and select S criterion, alternatively, D2D UE determines cell locating for D2D UE For suitable cell.

After carrying out the transmission of D2D data according to the D2D resource pool determined, further includes: judge whether to receive including D2D The wireless spread-spectrum technology RRC reconfiguration message of resource allocation information；In the case where the judgment result is yes, system is stopped using to disappear The D2D resource pool for abnormal conditions in breath.

A kind of device-to-device D2D data transmission device is additionally provided in the present embodiment, and the device is for realizing above-mentioned Embodiment and preferred embodiment, the descriptions that have already been made will not be repeated.As used below, term " module " can be real The combination of the software and/or hardware of existing predetermined function.Although device described in following embodiment is preferably realized with software, But the realization of the combination of hardware or software and hardware is also that may and be contemplated.

Fig. 5 is the structural block diagram of device-to-device D2D data transmission device one according to an embodiment of the present invention, such as Fig. 5 institute Show, which includes: the first determining module 52 and sending module 54, is illustrated below to the device.

Whether first determining module 52 is used to indicate D2D sender of communications user equipment (UE) to packet data for determination Convergence protocol PDCP protocol Data Unit PDU carries out the PDCP head compression instruction information of PDCP compression processings；And/or it is used for Indicate whether D2D sender of communications user equipment (UE) carries out PDCP to Packet Data Convergence Protocol PDCP protocol Data Unit PDU The PDCP encryption indication information of encryption；Sending module 54 is connected to above-mentioned first determining module 52, for communicating to D2D Recipient UE sends PDCP compression instruction information and/or PDCP encryption indication information.

Above-mentioned first determining module 52 is also used at least one in the following manner, determine that being used to indicate D2D communication sends Whether square user equipment (UE) carries out the PDCP of PDCP compression processings to Packet Data Convergence Protocol PDCP protocol Data Unit PDU Head compression instruction information and/or PDCP encryption indication information: PDCP compression instruction letters are determined according to D2D characteristics of communications traffic Breath and/or PDCP encryption indication information；PDCP pressures are determined according to the configuration information that D2D sender of communications UE own base station is sent Contracting instruction information and/or PDCP encryption indication information；The configuration sent according to the affiliated ProSe server of D2D sender of communications UE Information determines PDCP compression instruction information and/or PDCP encryption indication information；Using clothes according to belonging to D2D sender of communications UE The configuration information that business device AS is sent determines PDCP compression instruction information and/or PDCP encryption indication information.

Preferably, above-mentioned sending module 54 is also used to by the way that PDCP compressions are indicated information and/or PDCP encryption instruction Information carries the mode in PDCP PDU data packet, to D2D communication receiver UE send PDCP compressions indicate information and/or PDCP encryption indication information.

Preferably, above-mentioned sending module 54 is also used to by the way that PDCP compressions are indicated information and/or PDCP encryption instruction Information carries the mode of the header part PDCP in PDCP PDU data packet, sends PDCP pressures to D2D communication receiver UE Contracting instruction information and/or PDCP encryption indication information.

Wherein, the header part PDCP in above-mentioned PDCP PDU data packet further includes at least one following information: maxCID, profiles。

Preferably, above-mentioned sending module is also used to by the way that PDCP compressions are indicated information and/or PDCP encryption instruction letter Breath carries the mode in the PDU type field of the header part PDCP in PDCP PDU data packet, sends out to D2D communication receiver UE Send PDCP compression instruction information and/or PDCP encryption indication information；Or by by PDCP compressions indicate information and/or PDCP encryption indication information carries the mode in the security information instructions field of the header part PDCP in PDCP PDU data packet, PDCP compression instruction information and/or PDCP encryption indication information are sent to D2D communication receiver UE；It can also be by by PDCP Head compression instruction information and/or PDCP encryption indication information carry the head pressure of the header part PDCP in PDCP PDU data packet Mode in contracting instructions field and/or in encryption instructions field, to D2D communication receiver UE send PDCP compressions indicate information with/ Or PDCP encryption indication information.

Wherein, the PDU type field of the header part PDCP is used to indicate the type of PDCP PDU data packet, the value packet of type Include at least one of: Internet Protocol IP packet, the IP packet compressed using head, does not use head compression at Address Resolution Protocol ARP packet IP packet.

Fig. 6 is the structural block diagram of device-to-device D2D data transmission device two according to an embodiment of the present invention, such as Fig. 6 institute Show, which includes: receiving module 62 and processing module 64, is illustrated below to the device.

Whether receiving module 62 is used to indicate D2D sender of communications user equipment (UE) to packet data convergence for receiving Agreement PDCP protocol Data Unit PDU carries out the PDCP head compression instruction information of PDCP compression processings；And/or it is used to indicate Whether D2D sender of communications user equipment (UE) carries out PDCP encryption to Packet Data Convergence Protocol PDCP protocol Data Unit PDU The PDCP encryption indication information of processing；Processing module 64 is connected to above-mentioned receiving module 62, for pressing according to received PDCP Contracting instruction information and/or PDCP encryption indication information carry out PDCP layers of processing.

Fig. 7 is the preferred of processing module 64 in device-to-device D2D data transmission device two according to an embodiment of the present invention Structural block diagram, as shown in fig. 7, the processing module 64 includes: processing unit 72 and abandons unit 74, below to the processing module 64 It is illustrated.

Processing unit 72, for being carried out in PDCP compression instruction information instruction D2D sender of communications UE to PDCP PDU PDCP compressions and/or PDCP encryption indication information instruction D2D sender of communications UE to PDCP PDU have carried out PDCP encryption In the case where processing, head decompression and/or decryption processing are carried out to the PDCP PDU received；Unit 74 is abandoned, is used In PDCP compressions instruction information instruction D2D sender of communications UE not to PDCP PDU carried out PDCP compress and/or In the case that PDCP encryption indication information indicates that D2D sender of communications UE does not carry out PDCP encryption to PDCP PDU, put It abandons and head decompression and/or decryption processing is carried out to the PDCP PDU received.

Preferably, above-mentioned receiving module 62 is also used to by the way that PDCP compressions are indicated information and/or PDCP encryption instruction Information carries the mode in PDCP PDU data packet, receives PDCP compression instruction information and/or PDCP encryption indication information.

Preferably, above-mentioned receiving module 62 is also used to by the way that PDCP compressions are indicated information and/or PDCP encryption instruction Information carries the mode of the header part PDCP in PDCP PDU data packet, receive PDCP compressions indicate information and/or PDCP encryption indication information.

Wherein, the header part PDCP in above-mentioned PDCP PDU data packet can also include at least one following information: maxCID、profiles。

Preferably, above-mentioned receiving module 62, is also used to following one: by by PDCP compressions indicate information and/or PDCP encryption indication information carries the mode in the PDU type field of the header part PDCP in PDCP PDU data packet, receives To PDCP compression instruction information and/or PDCP encryption indication information；By the way that PDCP compressions are indicated that information and/or PDCP add Close instruction information carries the mode in the security information instructions field of the header part PDCP in PDCP PDU data packet, to D2D Communication receiver UE sends PDCP compression instruction information and/or PDCP encryption indication information, by indicating PDCP compressions Information and/or PDCP encryption indication information carry in the PDU type field of the header part PDCP in PDCP PDU data packet and/ Or the mode in encryption instructions field, receive PDCP compression instruction information and/or PDCP encryption indication information.

Preferably, the PDU type field of the above-mentioned header part PDCP is used to indicate the type of PDCP PDU data packet, type Value includes at least one of: Internet Protocol IP packet, the IP packet compressed using head, is not used Address Resolution Protocol ARP packet The IP packet of head compression.

Fig. 8 is the structural block diagram of device-to-device D2D data transmission device three according to an embodiment of the present invention, such as Fig. 8 institute Show, which includes: the second determining module 82 and transmission module 84, is illustrated below to the device.

Second determining module 82, the device-to-device D2D for abnormal conditions for determining in cell system message are provided Source pond；Transmission module 84 is connected to above-mentioned second determining module 82, for carrying out D2D data biography according to the D2D resource pool determined It is defeated.

Fig. 9 is the preferred structure block diagram one of device-to-device D2D data transmission device three according to an embodiment of the present invention, such as Shown in Fig. 9, the device except include all modules shown in Fig. 8 in addition to, further include detection module 92, below to the detection module 92 into Row explanation.

Detection module 92 is connected to above-mentioned second determining module 82 and transmission module 84, carries out D2D data for detecting The D2D user equipment of transmission is in the coverage area of cell.

Preferably, D2D UE is in the coverage area of cellular cell can meet cell choosing for cell locating for D2D UE S criterion is selected, alternatively, D2D UE determines that cell locating for D2D UE is suitable cell.

Figure 10 is the preferred structure block diagram two of device-to-device D2D data transmission device three according to an embodiment of the present invention, As shown in Figure 10, which further includes judgment module 102 and stopping modular 104 in addition to including all modules shown in Fig. 8, under It is illustrated in face of the device.

Judgment module 102 is connected to above-mentioned transmission module 84, believes for judging whether to receive including D2D resource distribution The wireless spread-spectrum technology RRC reconfiguration message of breath；Stopping modular 104 is connected to above-mentioned judgment module 102, for judging mould The judging result of block is in the case where being, to stop using the D2D resource pool for abnormal conditions in system message.

Figure 11 is the structural block diagram of D2D UE according to an embodiment of the present invention, and as shown in figure 11, which includes The D2D data transmission device 3 114 of any of the above-described.

Honeycomb is moved to from no cellular network coverage area for the D2D UE in the related technology, carrying out D2D communication Under the scene of network's coverage area, the problem of how improving D2D business continuance and D2D recipient UE how to obtain D2D without Line carries the problem of PDCP layer parameter.

The D2D data transmission method that above-described embodiment and preferred embodiment through the embodiment of the present invention provides, can make It obtains D2D UE and obtains the resource sent for D2D communication data in time, effectively reduce the time delay of D2D communication service, guarantee that D2D is logical Telecommunications services continuity, and D2D recipient UE is made to obtain D2D radio bearer PDCP layer parameter, correctly to parse D2D communication number According to promotion D2D business service quality and user experience.The D2D data transmission method is illustrated below.

The D2D data transmission method includes: that D2D sender of communications UE adds PDCP compression instruction information and/or PDCP Close instruction information is sent to D2D communication receiver UE；D2D communication receiver UE, which compresses instruction information according to head, to carry out at PDCP layers Reason.

Wherein, above-mentioned PDCP compression instruction information is used to indicate whether D2D sender of communications UE carries out PDCP PDU PDCP compressions；Above-mentioned PDCP encryption indication information is used to indicate whether D2D sender of communications UE carries out PDCP to PDCP PDU Encryption.

Preferably, D2D sender of communications UE can by PDCP PDU data packet by PDCP compressions indicate information and/or PDCP encryption indication information is sent to D2D communication receiver UE.

PDCP compressions are indicated that information and/or PDCP encrypt by PDCP PDU data packet in D2D sender of communications UE When instruction information is sent to D2D communication receiver UE, more preferably, D2D sender of communications UE can be indicated PDCP compressions Information and/or PDCP encryption indication information include the header part PDCP in PDCP PDU.It should be noted that above-mentioned PDCP The header part PDCP in PDU can also include at least one following information: maxCID, profiles.

Preferably, PDCP compression instruction information and/or PDCP encryption indication information are included in by D2D sender of communications UE When the header part PDCP in PDCP PDU, D2D sender of communications UE can be by PDCP compressions instruction information and/or PDCP Encryption indication information includes in the PDU type field of the header part PDCP in PDCP PDU.Or by the way that PDCP compressions are referred to Show that information and/or PDCP encryption indication information carry the security information instruction of the header part PDCP in PDCPPDU data packet Mode in domain sends PDCP compression instruction information and/or PDCP encryption indication information to D2D communication receiver UE；It can also By the way that PDCP compression instruction information and/or PDCP encryption indication information are carried the PDCP packet in PDCP PDU data packet Mode in the head compression instructions field on head point and/or in encryption instructions field, sends PDCP compressions to D2D communication receiver UE Indicate information and/or PDCP encryption indication information.Wherein, which is used to indicate the type of PDCP PDU data packet, takes Value can be one of the following: IP packet, ARP packet, the IP packet compressed using head, the IP packet compressed without using head.

It should be noted that PDCP compressions are indicated information and/or PDCP encryption indication information by D2D sender of communications UE It is sent to before D2D communication receiver UE, can also determine the PDCP compression instruction information and/or PDCP in several ways Encryption indication information, for example, can determine at least one in the following manner: D2D sender of communications UE is according to D2D communication industry Feature of being engaged in voluntarily determines PDCP compression instruction information and/or PDCP encryption indication information；D2D sender of communications UE is according to base station Configuration determines PDCP compression instruction information and/or PDCP encryption indication information；D2D sender of communications UE is serviced according to ProSe Device or application server configuration determine PDCP compression instruction information and/or PDCP encryption indication information.

When D2D communication receiver UE compresses instruction information PDCP layers of processing of progress according to above-mentioned head, comprising: head compression instruction Information indicates that D2D sender of communications UE has carried out PDCP compressions to PDCP PDU and/or PDCP encryption indication information indicates D2D In the case that sender of communications UE has carried out PDCP encryption to PDCP PDU, D2D communication receiver UE need to be received to institute PDCP PDU carries out head decompression and/or decryption processing；Head compression instruction information instruction D2D sender of communications UE does not have PDCP compressions and/or PDCP encryption indication information instruction D2D sender of communications UE are carried out not to PDCP to PDCP PDU In the case that PDU carries out PDCP encryption, D2D communication receiver UE PDCP PDU not received to institute carries out head decompression Contracting processing and/or decryption processing.

In the present embodiment, a kind of D2D data transmission method is additionally provided, comprising: D2D UE uses cell system message In the D2D resource pool for abnormal conditions for D2D communication send.

D2D UE is sent using the D2D resource pool for abnormal conditions in cell system message for D2D communication D2D UE detects that it is in the coverage area of cell, i.e., the cell meets cell selection S criterion, alternatively, D2D UE is determined Cell locating for D2D UE is suitable cell.

D2D UE detects that it is in the covering of the cell, can use various ways, for example, can use with lower section Formula, D2D UE detect that the cell meets cell selection S criterion.

Before D2D UE is sent using the D2D resource pool for abnormal conditions in cell system message for D2D communication, It can also include: that D2D UE receives the D2D resource pool information for abnormal conditions in the cell system message.

In addition, in D2D UE using the D2D resource pool for abnormal conditions in cell system message for D2D communication hair After sending, if can also include: that D2D UE receives the RRC reconfiguration message comprising D2D resource allocation information, D2D UE stops Only using the D2D resource pool for abnormal conditions in system message.

Through the foregoing embodiment and preferred embodiment, it solves and is carrying out the D2D UE of D2D communication from no Cellular Networks The problem of network overlay area is moved under the scene of cellular network coverage area, how to improve D2D business continuance and D2D How recipient UE obtains the problem of D2D radio bearer PDCP layer parameter.Compared with the relevant technologies, D2D UE can be made to obtain in time The resource sent in D2D communication data is taken, the time delay of D2D communication service is effectively reduced, guarantees D2D communication service continuity, And D2D recipient UE is made to obtain D2D radio bearer PDCP layer parameter, correctly to parse D2D communication data, promote D2D business Service quality and user experience.

The preferred embodiment of the present invention is illustrated below.

Method preferred embodiment one

This preferred embodiment describes the method that head compression instruction is sent to recipient D2D UE by sender D2D UE. Figure 12 is the flow chart of preferred embodiment one according to the present invention, as shown in figure 12, the process the following steps are included:

Step 1, D2D sender UE voluntarily determines that PDCP compressions indicate information according to D2D characteristics of communications traffic；Alternatively, D2D sender of communications UE determines that PDCP compressions indicate information according to base station configuration, and base station can be D2D by the proprietary signaling of RRC Sender UE configuration；Alternatively, D2D sender of communications UE determines PDCP pressures according to ProSe server or application server configuration Contracting instruction information；Specifically, PDCP compression instruction information are used to indicate whether D2D sender of communications UE carries out PDCP PDU PDCP compressions.Specifically.If D2D sender of communications UE, which is determined, needs to carry out PDCP compressions, it is also necessary to determine PDCP pressures The parameter information (for example, maxCID (upper-layer configured), profiles etc.) of contracting.Similar, the parameter information of PDCP compressions It can voluntarily be determined, perhaps be configured by base station or by ProSe server or application server configuration by D2D sender of communications UE. The parameter information of PDCP compressions can also determine particular value by agreement.It should be noted that PDCP compressions are only used for IP number According to packet.

Step 2, D2D sender of communications UE, which compresses head, indicates that information is sent to D2D communication receiver UE.D2D communication hair PDCP compressions are indicated that information is sent to D2D communication receiver UE by PDCP PDU data packet by the side of sending UE.Specifically, D2D PDCP compression instruction information can be included the header part PDCP in PDCP PDU by sender of communications UE.PDCP compressions refer to Show that information can compress instructions field by newly-increased PDCP head to indicate, the PDCP compression instructions field can be 1 bit, example Such as, value 0 is represented without using PDCP compressions, and value 1 is represented using PDCP compressions；Alternatively, D2D sender of communications UE can lead to The PDU type field of the header part PDCP in PDCP PDU is crossed to indicate head compression instruction information.Figure 13 is to implement according to the present invention The D2D of example communicates PDCP PDU data packet form schematic diagram, as shown in figure 13, the wherein domain Layer-3PDU Type, that is, PDU type Domain is used to indicate the type of D2D communication PDCP PDU data packet, and value can be one of the following: IP packet, ARP packet are pressed using head The IP packet of contracting, the IP packet compressed without using head.If value is the IP packet compressed using head, then it represents that the PDCP PDU is used PDCP compressions, otherwise, indicate that the PDCP PDU does not use PDCP compressions.Table 1 is the value in the domain Layer-3PDU Type Example, as shown in table 1, value 000 can indicate that the PDCPPDU is the IP packet compressed using head, and value 001 can indicate the PDCP PDU is the IP packet compressed without using head.Optionally, the header part PDCP in PDCP PDU also may include following PDCP compression Parameter information: maxCID and/or profiles.

Table 1:Layer-3PDU Type value

Bit	Description
		000	The IP packet compressed using head
001	The IP packet compressed without using head
		010	ARP
011-111	reserved

Step 3, recipient D2D UE compresses the PDCP layers of processing of progress of instruction information according to head.Specifically, head compression instruction In the case that information indicates that D2D sender of communications UE has carried out PDCP compressions to the PDCP PDU, D2D communication receiver UE is needed PDCP PDU received to institute carries out head decompression；Head compression instruction information instruction D2D sender of communications UE is not right In the case that the PDCP PDU carries out PDCP compressions, D2D communication receiver UE PDCP PDU not received to institute carries out head Decompression.

Method preferred embodiment two

This preferred embodiment describes the side that PDCP layers of encryption instruction are sent to recipient D2DUE by sender D2D UE Method.Figure 14 is the flow chart of preferred embodiment two according to the present invention, as shown in figure 14, the process the following steps are included:

Step 1, D2D sender UE voluntarily determines whether to add PDCP data PDU according to D2D characteristics of communications traffic It is close；Alternatively, D2D sender of communications UE determines whether to execute PDCP layers of encryption according to base station configuration, base station can pass through the proprietary letter of RRC Enable is that D2D sender UE is configured；Alternatively, D2D sender of communications UE is according to ProSe server or application server configuration determination PDCP layers of no progress encryption；

Step 2, PDCP encryption indication information is sent to D2D communication receiver UE by D2D sender of communications UE.D2D communication PDCP encryption indication information is sent to D2D communication receiver UE by PDCP PDU data packet by sender UE.Specifically, D2D PDCP encryption indication information can be included the header part PDCP in PDCP PDU by sender of communications UE.As one of which side Formula, D2D sender of communications UE can indicate encryption information by the PDU type field of the header part PDCP in PDCP PDU.Figure 13 It is D2D according to an embodiment of the present invention communication PDCP PDU data packet form schematic diagram, as shown in figure 13, wherein Layer-3PDU The domain Type, that is, PDU type field is used to indicate the type of D2D communication PDCP PDU data packet.Table 2 is the domain Layer-3PDU Type Value example, as shown in table 2, the domain Layer-3PDU Type is made of three bits, can be respectively referred to by two of them bit Show whether the PDCP PDU is compressed using head, or whether uses encryption.For example, value 000 can indicate that the PDCP PDU is not used Head compresses, and without using encryption, value 001 can indicate that the PDCP PDU compresses without using head but use encryption, and value 010 indicates should PDCP PDU is compressed using head but without using encryption, and value 011 indicates that the PDCP PDU is compressed using head and using encryption.

Alternatively, D2D sender of communications UE can by the newly-increased encryption instructions field of the header part PDCP in PDCP PDU come Indicate encryption information.The encryption instructions field can be 1 bit, for example, value 0 is represented without using encryption, value 1, which represents, to be used Encryption.

Alternatively, D2D sender of communications UE can (such as security information refers to by the newly-increased domain of the header part PDCP in PDCP PDU Show domain) come indicate head compression and/or encryption information.The newly-increased domain can form for dibit position, and each bit indicates respectively Whether the PDCP PDU is compressed using head, and/or whether uses encryption.For example, value 00 can indicate that the PDCP PDU is not used Head compresses, and without using encryption, value 01 can indicate that the PDCP PDU compresses without using head but use encryption, and value 10 indicates should PDCP PDU is compressed using head but without using encryption, and value 11 indicates that the PDCP PDU is compressed using head and using encryption.

Table 2:Layer-3PDU Type value

Bit	Description
		000	It is compressed without using head, without using encryption
001	It is compressed without using head, uses encryption
		010	It is compressed using head, without using encryption
011	It is compressed using head, uses encryption
		100	ARP
101-111	reserved

Step 3, recipient D2D UE carries out PDCP layers of processing according to encryption indication information.Specifically, encryption indication information In the case that instruction D2D sender of communications UE has carried out PDCP layers of encryption to the PDCP PDU, D2D communication receiver UE need to be to institute Received PDCP PDU carries out head decryption processing；Encryption indication information indicates D2D sender of communications UE not to the PDCP In the case that PDU carries out PDCP layers of encryption, D2D communication receiver UE PDCP PDU not received to institute is carried out at PDCP layers of decryption Reason.

Method preferred embodiment three

The UE that this preferred embodiment describes carrying out D2D communication is moved to cellular network from cellular network covering is outer The method that available D2D resource is obtained during in covering, Figure 15 is schematic diagram of a scenario according to the preferred embodiment of the invention, As shown in figure 15, the D2D UE1 outside cellular network covering is carrying out D2D communication, is provided using the mode 2 being pre-configured Source pond (obtaining resource by competitive way from the resource pool) carries out the transmission of D2D communication data.Also, D2D UE1 is from bee Nest network coverage exterior domain is moved into the coverage area of the lower cell in base station 1.Figure 16 is preferred embodiment three according to the present invention Method schematic diagram, as shown in figure 16, D2D UE1 undergo following several stages in moving process, the D2D used in each stage Communication resource situation is as follows:

Stage 1:D2D UE is in no cellular network coverage area, and UE communicates money using the mode 2D2D being pre-configured at this time Source.UE is moved in the cellular network coverage area of base station 1 at this time.

Stage 2:UE detects that cell 1 meets sufficient cell selection S criterion under base station 1, it is assumed that the frequency point of cell 1 and the UE are pre- The D2D resource pool frequency point of configuration is identical, and UE need to stop using the D2D communication resource pond of pre-configuration at this time, to avoid in cell 1 Cellular communication interfere.Then, UE will attempt to read D2D resource pool information (D2D resource pool in the cell in SIB For under normal situation and/or abnormal conditions).It is assumed that including D2D communication resource pond information in cell SIB, then UE is from inspection The cell is measured to meet S criterion or meet suitable cell criterion D2D resource pool information this period into UE reading SIB Interior is the stage 2, and UE, without available D2D resource, interrupts the transmission of D2D communication data at stage 2.In this stage, if SIB In only comprising for containing 2 resource pool of mode for normal situation in 2 resource pool of mode or SIB of abnormal conditions But UE goes for 1 resource of mode, then the trial of UE initiation RRC connection establishment process is established RRC with base station and connect.

Stage 3:UE reads in SIB after D2D resource pool information, restores the transmission of D2D communication data.UE from read SIB Middle D2D resource completes RRC connection establishment process to UE and receives the RRC comprising D2D resource distribution (mode1 and/or mode 2) It is known as the stage 3 in the time of reconfiguration message, UE carries out the transmission of D2D communication using 2 resource of mode in SIB in the stage.

It (can be mode 1 with confidence that stage 4:UE, which gets the D2D resource allocation information that base station is sent by proprietary signaling, Breath or 2 resource pool information of mode) after, D2D communication is carried out according to the resource allocation information.

It should be noted that D2D UE is only when (i.e. the cell meets cell selection S criterion in the coverage area in cell Or meet suitable cell criterion), could use the cell communicates mode 2 for normal or the D2D of abnormal conditions Resource.Once the UE detects that the cell is unsatisfactory for S criterion or suitable cell criterion, being used for for the cell is stopped using The normal or D2D of abnormal conditions communicates 2 resource of mode.

In addition to the above scene, it is also contemplated that UE is moved to half mulching region from covering exterior domain, is then moved in covering again The scene in region, wherein half mulching region refers to that UE does not detect that cell meets S criterion or suitable cell criterion, but can With receive in covering or the D2D SS of covering outer UE transmission (D2D SS sequence be belonging respectively to set D2DSSue_net or Set D2DSSue_oon) and PD2DSCH.Under the scene, when UE is in covering outer state, the D2D resource pool of pre-configuration is used D2D communication is carried out, when UE, which is moved to, detects that it is in half mulching state namely UE is received in covering or covering is outer The D2D SS and PD2DSCH that UE is sent, then the UE uses the D2D resource pool received from PD2DSCH to carry out D2D communication.Work as UE It is moved to covering inner region, that is, when detecting that certain cell meets S criterion or meets suitable cell criterion, UE is obtained in SIB D2D resource pool (be used for normal condition or abnormal conditions, which may be identical or different with resource pool in PD2DSCH) Afterwards, D2D communication is carried out using D2D resource pool in the SIB.

Additionally, it is contemplated that UE is moved to half mulching region from covering inner region, it is then moved to the scene of covering exterior domain again, Identical, wherein half mulching region refers to that UE does not detect that cell meets S criterion or suitable cell criterion, but can connect Receiving the D2D SS that in covering or the outer UE of covering is sent, (D2D SS sequence is belonging respectively to set D2DSSue_net or set ) and PD2DSCH D2DSSue_oon.Under the scene, UE be in cover in state when, if detect certain cell meet S criterion or Meet suitable cell criterion and uses this after UE obtains the D2D resource pool (for normal condition or abnormal conditions) in SIB D2D resource pool carries out D2D communication in SIB.When UE is detected in half mulching state namely UE is presently in position and is unsatisfactory for Criterion in covering, but UE is received in covering or the D2D SS and PD2DSCH of covering outer UE transmission, then the UE use from (resource pool may be identical as normal or abnormal situation resource pool is used in SIB or not for D2D resource pool that PD2DSCH is received D2D communication is carried out together).When UE is moved to covering exterior domain, which carries out D2D communication using D2D resource is pre-configured.

Obviously, those skilled in the art should be understood that each module of the above invention or each step can be with general Computing device realize that they can be concentrated on a single computing device, or be distributed in multiple computing devices and formed Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored It is performed by computing device in the storage device, and in some cases, it can be to be different from shown in sequence execution herein Out or description the step of, perhaps they are fabricated to each integrated circuit modules or by them multiple modules or Step is fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific hardware and softwares to combine.

The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (24)

1. a kind of device-to-device D2D data transmission method characterized by comprising

Whether determination is used to indicate D2D sender of communications user equipment (UE) to Packet Data Convergence Protocol PDCP protocol Data Unit PDU carries out the PDCP head compression instruction information of PDCP compression processings；And/or it is used to indicate D2D sender of communications user equipment Whether UE carries out the PDCP encryption instruction letter of PDCP encryption to Packet Data Convergence Protocol PDCP protocol Data Unit PDU Breath；

The PDCP compression instruction information and/or the PDCP encryption indication information are sent to D2D communication receiver UE, In, by the way that the PDCP compression is indicated that information and/or the PDCP encryption indication information are carried in PDCP PDU data packet Mode, Xiang Suoshu D2D communication receiver UE sends PDCP compression instruction information and/or PDCP encryption indicates to believe Breath.

2. the method according to claim 1, wherein at least one in the following manner, determining the PDCP head Compression instruction information and/or the PDCP encryption indication information:

The PDCP compression instruction information and/or the PDCP encryption indication information are determined according to D2D characteristics of communications traffic；

The PDCP compression instruction information is determined according to the configuration information that the D2D sender of communications UE own base station is sent And/or the PDCP encryption indication information；

Determine that the PDCP compression refers to according to the configuration information that the affiliated ProSe server of the D2D sender of communications UE is sent Show information and/or the PDCP encryption indication information；

Determine that the PDCP compression refers to according to the configuration information that the affiliated application server AS of the D2D sender of communications UE is sent Show information and/or the PDCP encryption indication information.

3. the method according to claim 1, wherein by the way that the PDCP compression is indicated information and/or institute The mode for stating the header part PDCP that PDCP encryption indication information carries in the PDCP PDU data packet connects to D2D communication Debit UE sends the PDCP compression instruction information and/or the PDCP encryption indication information.

4. according to the method described in claim 3, it is characterized in that, the header part PDCP in the PDCP PDU data packet also Including at least one following information:

maxCID、profiles。

5. according to the method described in claim 3, it is characterised in that it includes following one:

By the way that the PDCP compression is indicated that information and/or the PDCP encryption indication information are carried in the PDCP PDU number According to the mode in the PDU type field of the header part PDCP in packet, the PDCP compression is sent to D2D communication receiver UE and is referred to Show information and/or the PDCP encryption indication information；

By the way that the PDCP compression is indicated that information and/or the PDCP encryption indication information are carried in the PDCP PDU number According to the mode in the security information instructions field of the header part PDCP in packet, the PDCP head is sent to D2D communication receiver UE Compression instruction information and/or the PDCP encryption indication information；

By the way that the PDCP compression is indicated that information and/or the PDCP encryption indication information are carried in the PDCP PDU number According to the mode in the head compression instructions field of the header part PDCP in packet and/or in encryption instructions field, to D2D communication receiver UE Send the PDCP compression instruction information and/or the PDCP encryption indication information.

6. a kind of device-to-device D2D data transmission method characterized by comprising

Whether reception is used to indicate D2D sender of communications user equipment (UE) to Packet Data Convergence Protocol PDCP protocol Data Unit PDU carries out the PDCP head compression instruction information of PDCP compression processings；And/or it is used to indicate D2D sender of communications user equipment Whether UE carries out the PDCP encryption instruction letter of PDCP encryption to Packet Data Convergence Protocol PDCP protocol Data Unit PDU Breath, wherein by the way that the PDCP compression is indicated that information and/or the PDCP encryption indication information are carried in PDCP PDU number According to the mode of packet, the PDCP compression instruction information and/or the PDCP encryption indication information are received；

PDCP layers of processing are carried out according to the received PDCP compression instruction information and/or the PDCP encryption indication information.

7. according to the method described in claim 6, it is characterized in that, according to received PDCP compression instruction information and/ Or PDCP layers of processing of the PDCP encryption indication information progress include:

Indicate that the D2D sender of communications UE has carried out PDCP head to the PDCP PDU in PDCP compression instruction information Compression and/or the PDCP encryption indication information indicate that the D2D sender of communications UE has carried out PDCP to the PDCP PDU In the case where encryption, head decompression and/or decryption processing are carried out to the PDCP PDU received；

Indicate that the D2D sender of communications UE does not carry out the PDCP PDU in PDCP compression instruction information PDCP compressions and/or the PDCP encryption indication information indicate the D2D sender of communications UE not to the PDCP PDU In the case where carrying out PDCP encryption, abandon carrying out at head decompression and/or decryption the PDCP PDU received Reason.

8. according to the method described in claim 6, it is characterized in that, by the way that the PDCP compression is indicated information and/or institute The mode for stating the header part PDCP that PDCP encryption indication information carries in the PDCP PDU data packet receives described PDCP compression instruction information and/or the PDCP encryption indication information.

9. according to the method described in claim 8, it is characterized in that, the header part PDCP in the PDCP PDU data packet also Including at least one following information:

maxCID、profiles。

10. according to the method described in claim 8, it is characterised in that it includes following one:

By the way that the PDCP compression is indicated that information and/or the PDCP encryption indication information are carried in the PDCP PDU number According to the mode in the PDU type field of the header part PDCP in packet, the PDCP compression instruction information and/or described is received PDCP encryption indication information；

By the way that the PDCP compression is indicated that information and/or the PDCP encryption indication information are carried in the PDCP PDU number According to the mode in the security information instructions field of the header part PDCP in packet, the PDCP head is sent to D2D communication receiver UE Compression instruction information and/or the PDCP encryption indication information；

By the way that the PDCP compression is indicated that information and/or the PDCP encryption indication information are carried in the PDCP PDU number According to the mode in the PDU type field of the header part PDCP in packet and/or in encryption instructions field, the PDCP compression is received Indicate information and/or the PDCP encryption indication information.

11. according to the method described in claim 10, it is characterized in that, the PDU type field of the header part PDCP is for referring to Show the type of the PDCP PDU data packet, the value of the type includes at least one of:

Internet Protocol IP packet, Address Resolution Protocol ARP packet, the IP packet compressed using head, the IP packet compressed without using head.

12. a kind of device-to-device D2D data transmission device characterized by comprising

First determining module is used to indicate whether D2D sender of communications user equipment (UE) assists packet data convergence for determining Discuss the PDCP head compression instruction information that PDCP protocol Data Unit PDU carries out PDCP compression processings；And/or it is used to indicate D2D Whether sender of communications user equipment (UE) carries out PDCP encryption to Packet Data Convergence Protocol PDCP protocol Data Unit PDU PDCP encryption indication information；

Sending module, for sending the PDCP compression instruction information and/or PDCP encryption to D2D communication receiver UE Indicate information；

Wherein, the sending module, for sending the PDCP compression to the D2D communication receiver UE in the following manner Instruction information and/or the PDCP encryption indication information: by the way that the PDCP compression is indicated that information and/or the PDCP add Close instruction information carries the mode in PDCP PDU data packet, and Xiang Suoshu D2D communication receiver UE sends the PDCP compression Indicate information and/or the PDCP encryption indication information.

13. device according to claim 12, which is characterized in that first determining module is also used to by with lower section At least one formula determines the PDCP compression instruction information and/or the PDCP encryption indication information:

The PDCP compression instruction information and/or the PDCP encryption indication information are determined according to D2D characteristics of communications traffic；

The PDCP compression instruction information is determined according to the configuration information that the D2D sender of communications UE own base station is sent And/or the PDCP encryption indication information；

Determine that the PDCP compression refers to according to the configuration information that the affiliated ProSe server of the D2D sender of communications UE is sent Show information and/or the PDCP encryption indication information；

Determine that the PDCP compression refers to according to the configuration information that the affiliated application server AS of the D2D sender of communications UE is sent Show information and/or the PDCP encryption indication information.

14. device according to claim 12, which is characterized in that the sending module is also used to by by the PDCP Head compression instruction information and/or the PDCP encryption indication information carry the PDCP packet header in the PDCP PDU data packet The mode divided sends the PDCP compression instruction information to D2D communication receiver UE and/or PDCP encryption instruction is believed Breath.

15. device according to claim 14, which is characterized in that the header part PDCP in the PDCP PDU data packet Further include at least one following information:

maxCID、profiles。

16. device according to claim 14, which is characterized in that the sending module is also used to following one:

By the way that the PDCP compression is indicated that information and/or the PDCP encryption indication information are carried in the PDCP PDU number According to the mode in the PDU type field of the header part PDCP in packet, the PDCP compression is sent to D2D communication receiver UE and is referred to Show information and/or the PDCP encryption indication information；

By the way that the PDCP compression is indicated that information and/or the PDCP encryption indication information are carried in the PDCP PDU number According to the mode in the security information instructions field of the header part PDCP in packet, the PDCP head is sent to D2D communication receiver UE Compression instruction information and/or the PDCP encryption indication information；

By the way that the PDCP compression is indicated that information and/or the PDCP encryption indication information are carried in the PDCP PDU number According to the mode in the head compression instructions field of the header part PDCP in packet and/or in encryption instructions field, to D2D communication receiver UE Send the PDCP compression instruction information and/or the PDCP encryption indication information.

17. device according to claim 16, which is characterized in that the PDU type field of the header part PDCP is for referring to Show the type of the PDCP PDU data packet, the value of the type includes at least one of:

Internet Protocol IP packet, Address Resolution Protocol ARP packet, the IP packet compressed using head, the IP packet compressed without using head.

18. a kind of device-to-device D2D data transmission device characterized by comprising

Whether receiving module is used to indicate D2D sender of communications user equipment (UE) to Packet Data Convergence Protocol for receiving PDCP protocol Data Unit PDU carries out the PDCP head compression instruction information of PDCP compression processings；And/or it is used to indicate D2D and leads to Believe whether sender's user equipment (UE) carries out PDCP encryption to Packet Data Convergence Protocol PDCP protocol Data Unit PDU PDCP encryption indication information；

Processing module, for according to the received PDCP compression indicate information and/or the PDCP encryption indication information into PDCP layers of row processing；

Wherein, the receiving module, for receiving the PDCP compression instruction information in the following manner；And/or it is described PDCP encryption indication information: by the way that the PDCP compression is indicated that information and/or the PDCP encryption indication information carry The mode of PDCP PDU data packet receives the PDCP compression instruction information and/or the PDCP encryption indication information.

19. device according to claim 18, which is characterized in that the processing module includes:

Processing unit, for indicating the D2D sender of communications UE to the PDCP in PDCP compression instruction information PDU has carried out PDCP compressions and/or the PDCP encryption indication information indicates the D2D sender of communications UE to the PDCP In the case that PDU has carried out PDCP encryption, the PDCP PDU received is carried out at head decompression and/or decryption Reason；

Unit is abandoned, for indicating the D2D sender of communications UE not to described in PDCP compression instruction information PDCP PDU has carried out PDCP compressions and/or the PDCP encryption indication information indicates that the D2D sender of communications UE does not have In the case where carrying out PDCP encryption to the PDCP PDU, abandon carrying out at the decompression of head the PDCP PDU received Reason and/or decryption processing.

20. device according to claim 18, which is characterized in that the receiving module is also used to by by the PDCP Head compression instruction information and/or the PDCP encryption indication information carry the PDCP packet header in the PDCP PDU data packet The mode divided receives the PDCP compression instruction information and/or the PDCP encryption indication information.

21. device according to claim 20, which is characterized in that the header part PDCP in the PDCP PDU data packet Further include at least one following information:

maxCID、profiles。

22. device according to claim 20, which is characterized in that the receiving module is also used to following one:

By the way that the PDCP compression is indicated that information and/or the PDCP encryption indication information are carried in the PDCP PDU number According to the mode in the PDU type field of the header part PDCP in packet, the PDCP compression instruction information and/or described is received PDCP encryption indication information；

By the way that the PDCP compression is indicated that information and/or the PDCP encryption indication information are carried in the PDCP PDU number According to the mode in the security information instructions field of the header part PDCP in packet, the PDCP head is sent to D2D communication receiver UE Compression instruction information and/or the PDCP encryption indication information；

By the way that the PDCP compression is indicated that information and/or the PDCP encryption indication information are carried in the PDCP PDU number According to the mode in the PDU type field of the header part PDCP in packet and/or in encryption instructions field, the PDCP compression is received Indicate information and/or the PDCP encryption indication information.

23. device according to claim 22, which is characterized in that the PDU type field of the header part PDCP is for referring to Show the type of the PDCP PDU data packet, the value of the type includes at least one of:

Internet Protocol IP packet, Address Resolution Protocol ARP packet, the IP packet compressed using head, the IP packet compressed without using head.

24. a kind of device-to-device D2D user equipment (UE), which is characterized in that including described in any one of claim 12 to 23 Device.