CN107690165A - A kind of method of network connection, base station, trunk subscriber equipment and system - Google Patents
A kind of method of network connection, base station, trunk subscriber equipment and system Download PDFInfo
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- H—ELECTRICITY
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- H—ELECTRICITY
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Abstract
The invention discloses a kind of method of network connection, base station, trunk subscriber equipment and system.This method includes：When receiving the radio resource control RRC connection request of distal end UE transmissions, the cell ID PCI where distal end UE the first UE marks, the network side temporary mark C RNTI and relaying UE of relaying UE cell level is obtained；Determine whether to establish temporary communication channel for distal end UE according to the cell ID PCI where the first UE marks, the network side temporary mark C RNTI of relaying UE cell level and relaying UE；Temporary communication channel is established if distal end UE, then is carried out data transmission by the temporary communication channel of foundation for distal end UE；When distal end UE routinely eats dishes without rice or wine connection, eat dishes without rice or wine to carry out data transmission for distal end UE using conventional.The embodiment of the present invention can provide temporary communication channel by base station before distal end UE gets conventional interface-free resources for distal end UE, communication channels of the distal end UE at switch data port is kept unimpeded, reduce traffic delay.
Description
Technical Field
The embodiment of the invention relates to a wireless mobile communication technology, in particular to a network connection method, a base station, relay user equipment and a system.
Background
With the development of wireless mobile communication technology, people put higher and higher demands on high speed, low delay and low cost. An Advanced International Mobile Telecommunications-Advanced (IMT-a) system allows Device-to-Device (D2D) communications to be supported under a cellular network to improve spectrum utilization. Device-to-Device (D2D) communication is a new technology that allows direct communication between terminals through multiplexing of cell resources under control of the system.
Typical applications of D2D include D2D communication and D2D discovery. In Release 13(R13), the D2D application is extended to support an in-network User Equipment (UE) to act as a relay to an out-of-network UE, and the relay UE and a remote UE communicate with each other through a PC5 port. The intra-network UE that performs the relay function is also referred to as a relay UE, and the extra-network UE that performs communication through the relay UE is also referred to as a remote UE. The remote UE measures the air interface signal, and when a suitable cell is found, the traffic between the remote UE and the network side is transferred from the PC5 interface to the Uu interface, where the Uu interface is an interface used when the UE communicates with the network side base station.
Since the remote UE enters the network covered by the base station from outside the network covered by the base station, the remote UE needs to perform network registration first and can communicate through the Uu interface base station. However, during the registration process, the remote UE cannot communicate through the PC5 port or the Uu interface, which results in a large service interruption delay.
Disclosure of Invention
The invention provides a network connection method, a base station, relay user equipment and a system, which are used for reducing service interruption time delay when a remote UE is switched from a PC5 interface to a Uu interface.
In a first aspect, an embodiment of the present invention provides a method for network connection, where the method is applied to a base station, and includes:
when a Radio Resource Control (RRC) connection request sent by remote User Equipment (UE) is received, acquiring a first UE identifier of the remote UE, a network side temporary identifier (C-RNTI) of a cell level of relay UE and a cell identifier (PCI) where the relay UE is located;
determining whether to establish a temporary communication channel for the remote UE according to the first UE identifier, the network side temporary identifier C-RNTI of the cell level of the relay UE and the cell identifier PCI of the relay UE;
if a temporary communication channel is established for the remote UE, carrying out data transmission for the remote UE through the established temporary communication channel;
and when the remote UE is connected with the conventional air interface, using the conventional air interface to transmit data for the remote UE.
In a second aspect, an embodiment of the present invention further provides a method for network connection, where the method is applied to a relay UE that provides a relay service for a remote UE, and includes:
and sending the network side temporary identifier C-RNTI of the cell level of the relay UE and the cell identifier PCI of the relay UE to the remote UE, so that the remote UE sends the network side temporary identifier C-RNTI of the cell level of the relay UE, the cell identifier PCI of the relay UE and the first UE identifier of the remote UE to the base station when the remote UE determines to switch from the relay UE to the base station.
In a third aspect, an embodiment of the present invention further provides a base station, including:
a base station receiving unit, configured to receive a radio resource control RRC connection request sent by a remote UE;
an obtaining unit, configured to obtain, when the base station receiving unit receives a radio resource control RRC connection request sent by the remote UE, a first UE identity of the remote UE, a network side temporary identity C-RNTI of a cell level of a relay UE, and a cell identity PCI where the relay UE is located;
a determining unit, configured to determine whether to establish a temporary communication channel for the remote UE according to the first UE identity obtained by the obtaining unit, a network side temporary identity C-RNTI in a cell level of the relay UE, and a cell identity PCI in which the relay UE is located;
a temporary communication unit, configured to, when the determining unit determines that a temporary communication channel is established for the remote UE, perform data transmission for the remote UE through the established temporary communication channel;
and the conventional communication unit is used for performing data transmission on the remote UE by using the conventional air interface when the remote UE is connected with the conventional air interface.
In a fourth aspect, an embodiment of the present invention further provides a relay user equipment, where the relay user equipment is configured to provide a relay service for a remote UE, and the relay user equipment includes:
the relay sending unit is used for sending the network side temporary identifier C-RNTI of the relay UE at the cell level and the cell identifier PCI where the relay UE is located to the remote UE, so that when the remote UE determines to switch from the relay UE to a base station, the remote UE sends the network side temporary identifier C-RNTI of the relay UE at the cell level, the cell identifier PCI where the relay UE is located and the first UE identifier of the remote UE to the base station.
In a fifth aspect, an embodiment of the present invention further provides a system for network connection, where the system includes the base station shown in the third aspect, the relay user equipment shown in the fourth aspect, and a remote user equipment.
When a base station combines a wireless resource control connection request sent by a remote UE, the base station can determine whether the remote UE uses a relay UE served by the base station as a relay to forward data or not before according to a first UE mark and a cell mark of the remote UE; if so, establishing a temporary communication channel for the remote UE, and after the remote UE is registered through the core network, using the corresponding conventional air interface resource after registration to serve the remote UE. In the prior art, when the remote UE cannot forward data through the relay UE and cannot forward data through the base station in the registration process, the service delay is high. The embodiment of the invention can provide the temporary communication channel for the remote UE through the base station before the remote UE acquires the conventional air interface resource, so that the communication channel of the remote UE is kept smooth when the data port is switched, and the service delay is reduced.
Drawings
FIG. 1 is a diagram of a network architecture employed by an embodiment of the present invention;
fig. 2 is a flowchart of a first method for network connection according to an embodiment of the present invention;
FIG. 3 is a flow chart of a method for providing a second network connection according to an embodiment of the present invention;
fig. 4 is a flowchart of a third method for network connection according to an embodiment of the present invention;
fig. 5 is a flowchart of a method for connecting to a first network according to a second embodiment of the present invention;
fig. 6 is a flowchart of a second method for network connection according to a second embodiment of the present invention;
fig. 7 is a flowchart of a third method for network connection according to the second embodiment of the present invention;
fig. 8 is a flowchart of a fourth method for network connection according to the second embodiment of the present invention;
fig. 9 is a flowchart of a method for network connection according to a third embodiment of the present invention;
fig. 10 is a schematic structural diagram of a base station according to a fourth embodiment of the present invention;
fig. 11 is a schematic structural diagram of a relay user equipment according to a fifth embodiment of the present invention;
fig. 12 is a schematic diagram of a network connection system according to a sixth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a network architecture diagram adopted in the embodiment of the present invention, wherein a coverage area of a base station covers a relay user equipment (ue), which is also called relay ue (real ue), and the base station does not cover a remote user equipment (ue), which is also called remote ue (remote ue). The relay UE can access the core network through the base station, meanwhile, the relay UE realizes data forwarding between the base station and the remote UE through D2D communication between the relay UE and the remote UE, and the remote UE can access the core network through the relay UE. Optionally, the base station is an eNB.
In the embodiment of the present invention, when the relay UE performs the relay service for the remote UE, the association condition of each layer of protocol is: and the remote UE performs relay service for the remote UE from a network layer corresponding to the IP protocol to a physical layer by the relay UE. It can be seen that the remote UE and the relay UE lack a control plane on the PC5 interface, as to the broadcast information of the relay UE. Therefore, when the application layer performs continuous data communication and the remote UE detects that the signal of the base station of the cell to which the relay UE belongs is stronger than that of the relay UE, the remote UE needs to be docked with the base station from the network layer where the IP protocol is located, and then a problem of high service interruption delay caused by core network registration occurs.
Example one
Fig. 2 is a flowchart of a network connection method according to an embodiment of the present invention, where this embodiment is applicable to a case where a remote UE is handed over from a relay UE to a base station in D2D communication, and the method may be executed by the base station, and specifically includes the following steps:
step 110, when receiving a radio resource control RRC connection request sent by a remote UE, obtaining a first UE identity of the remote UE, a network side temporary identity C-RNTI of a cell level of a relay UE, and a cell identity PCI where the relay UE is located.
When a Radio Resource Control (RRC) connection request sent by a remote UE sending end is received, a data acquisition instruction is sent to the remote UE, and the data acquisition instruction is used for indicating the remote UE to send an identifier (namely a first UE identifier) of the remote UE, a network side temporary identifier C-RNTI of a cell level of relay UE and a cell identifier PCI where the relay UE is located to a base station. And after receiving the data acquisition instruction, the remote UE sends a first UE identifier stored in the remote UE, a network side temporary identifier C-RNTI of the cell level of the relay UE and a cell identifier PCI where the relay UE is located to a base station. And if the first UE identification, the network side temporary identification C-RNTI of the cell level of the relay UE and the cell identification PCI where the relay UE is located are not stored, sending a lack data message to the base station.
Optionally, the RRC connection request is analyzed to obtain a first UE identity, a network side temporary identity C-RNTI of a cell level of the relay UE, and a cell identity PCI of the relay UE, where the RRC connection request carries the first UE identity, the network side temporary identity C-RNTI of the cell level of the relay UE, and the cell identity PCI of the relay UE.
By carrying the first UE identification, the network side temporary identification C-RNTI of the cell level of the relay UE and the cell identification PCI where the relay UE is located in the RRC, the remote UE can send the parameters to the base station while sending an RRC connection request to the base station, so that the base station does not need to actively acquire the parameters, the data interaction times are reduced, and the resource utilization rate is improved.
Or, optionally, the first UE identity sent by the remote UE, the network side temporary identity C-RNTI of the cell level of the relay UE, and the cell identity PCI where the relay UE is located are received by the first MAC CE.
The remote UE defines a Logical Channel Identity (LCID) of a first MAC CE, and sends the parameter to the base station through the first MAC CE when sending an RRC connection request to the base station, so as to implement synchronous transmission of the RRC connection request and the parameter, thereby improving data transmission efficiency and network access efficiency.
And step 120, determining whether to establish a temporary communication channel for the remote UE according to the first UE identifier, the network side temporary identifier C-RNTI of the cell level of the relay UE and the cell identifier PCI of the relay UE.
When the base station forwards the data, the base station stores communication information corresponding to the forwarded data, wherein the communication information comprises a source physical address, a destination address and the like of the transmitted data. Preferably, the first UE is identified as the physical address of the remote UE, i.e. Layer2 ID. The communication information further includes a network side temporary identity C-RNTI of a Cell level of the UE (i.e., the relay UE) covered by the base station and a Cell identity PCI where the relay UE is located, where the PCI is a Physical Cell identity (Physical Cell Identifier). And if the received first UE identification of the remote UE, the network side temporary identification C-RNTI of the cell level of the relay UE and the cell identification PCI where the relay UE is located are matched with the historical communication information, determining to establish a temporary communication channel for the remote UE.
For example, assuming that the base station forwards 10 data packets, the source physical address, the C-RNTI and the PCI corresponding to the 10 data packets are determined. The resource mapping table of the base station is shown in table 1, and the corresponding communication information of the data packets 1, 2, and 3 is: source physical address: a-1, C-RNTI: b-1, PCI: c-1; the corresponding communication information of the data packets 4, 5 is: source physical address: a-2 and C-RNTI: b-2, PCI: c-2; the corresponding communication information of the data packets 6, 7, 8 is: source physical address: a-3, C-RNTI: b-3, PCI: c-3; the corresponding communication information of the data packets 9, 10 is: source physical address: a-4, C-RNTI: b-4, PCI: and C-4.
TABLE 1
| Serial number | Source physical address | C‐RNTI | PCI | Data packet |
| 1 | A‐1 | B‐1 | C‐1 | Data packet 1, data packet 2, and data packet 3 |
| 2 | A‐2 | B‐2 | C‐2 | Data packet 4, data packet 5 |
| 3 | A‐3 | B‐3 | C‐3 | Data packet 6, data packet 7, data packet 8 |
| 4 | A‐4 | B‐4 | C‐4 | Data packet 9, data packet 10 |
If the source physical address obtained in step 110 is a-2, the C-RNTI is B-2, and the PCI is C-2, it may be determined that the base station provided the data transmission service to the remote UE through the relay UE in the base station cell, and thus it is determined to establish a temporary communication channel for the remote UE. The base station cell is a cell corresponding to the coverage area of the base station.
Further, as shown in fig. 3, in step 110, before obtaining the first UE identity of the remote UE, the network side temporary identity C-RNTI of the cell level of the relay UE, and the cell identity PCI where the relay UE is located when receiving the radio resource control RRC connection request sent by the remote UE, the method further includes:
and 150, receiving device-to-device D2D connection information sent by the relay UE, wherein the D2D connection information comprises a network side temporary identifier C-RNTI of the relay UE at the cell level and a cell identifier PCI where the relay UE is located.
The base station can directly establish the resource mapping table shown in the table 1 according to the D2D connection information sent by the relay UE, so that recording and counting of the whole communication process are not needed, and system resources of the base station are saved.
Step 130, if a temporary communication channel is established for the remote UE, performing data transmission for the remote UE through the established temporary communication channel.
If it is determined in step 120 that the temporary communication channel is established for the remote UE, and then data transmission is performed for the remote UE through the established temporary communication channel. If it is determined in step 120 that the temporary communication channel is not established for the remote UE, the remote UE needs to obtain the conventional air interface resource allocated by the base station after registering through the core network.
Specifically, the establishing of the temporary communication channel for the remote UE may be implemented as: and establishing a Data Radio Bearer (DRB) temporary communication channel for the remote UE.
Further, as shown in fig. 4, in order to establish the temporary communication channel more quickly and perfectly, before performing data transmission for the remote UE through the established temporary communication channel, the method further includes:
step 131, receiving a communication parameter sent by the relay UE, where the communication parameter includes at least one of a mapping relationship between a Per-Packet priority pppp (prose Per Packet priority) of the adjacent service and a data radio bearer DRB, an IP address of the remote UE, a security parameter, an IP address of the relay UE, and a port number used by the remote UE.
Optionally, step 131 may be performed after step 120. Optionally, the communication parameter may also be carried by an RRC connection request, or acquired by the first MAC CE.
Step 132, establishing a temporary communication channel for the UE according to the communication parameters.
Illustratively, a radio bearer corresponding to the PPPP of the remote UE is configured for the remote UE according to the mapping relationship between the PPPP and the data radio bearer DRB. And performing network layer configuration for the remote UE according to the IP address of the remote UE and the IP address of the relay UE. And encrypting the communication of the remote UE according to the security parameters. And configuring a network port for the remote UE according to the port number used by the remote UE.
And a more perfect and safe temporary channel can be established for the remote UE more comprehensively and quickly according to the communication parameters, so that the speed and the safety of establishing the temporary channel are improved.
And step 140, when the remote UE is connected over the conventional air interface, using the conventional air interface to perform data transmission for the remote UE.
The remote UE accesses the core network through a Mobile Management Entity (MME) to perform network registration, and after the registration is completed, the base station uses the remote UE as a UE in a cell of the base station, allocates an air interface resource to the UE, and completes an air interface connection when the establishment of the air interface resource is completed. After the air interface connection, the temporary communication information can be stopped being used, and air interface resources are used for carrying out data transmission service for the remote UE.
When a base station combines a wireless resource control connection request sent by a remote UE, the base station can determine whether the remote UE uses a relay UE served by the base station as a relay to forward data or not before according to a first UE mark and a cell mark of the remote UE; if so, establishing a temporary communication channel for the remote UE, and after the remote UE is registered through the core network, using the corresponding conventional air interface resource after registration to serve the remote UE. In the prior art, when the remote UE cannot forward data through the relay UE and cannot forward data through the base station in the registration process, the service delay is high. The embodiment of the invention can provide the temporary communication channel for the remote UE through the base station before the remote UE acquires the conventional air interface resource, so that the communication channel of the remote UE is kept smooth when the data port is switched, and the service delay is reduced.
Example two
Fig. 5 is a flowchart of a network connection method provided in the second embodiment of the present invention, where the method is applied to a relay UE that provides a relay service for a remote UE, and includes:
step 210, sending the network side temporary identity C-RNTI of the cell level of the relay UE and the cell identity PCI where the relay UE is located to the remote UE, so that when the remote UE determines to switch from the relay UE to the base station, the remote UE sends the network side temporary identity C-RNTI of the cell level of the relay UE, the cell identity PCI where the relay UE is located and the first UE identity of the remote UE to the base station.
The relay UE is used as user equipment in a base station cell, and after the relay UE is accessed to the base station cell, the network side temporary identity C-RNTI of the relay UE at the cell level and the cell identity PCI where the relay UE is located can be obtained. And after the relay UE and the remote UE establish D2D connection, the relay UE sends the known C-RNTI and PCI to the remote UE. And when the remote UE determines that the remote UE needs to be accessed to the base station cell through signal strength detection, the C-RNTI, the PCI and the remote UE identifier received from the relay UE are sent to the base station, so that the base station determines whether to establish a temporary communication channel for the remote UE according to the C-RNTI, the PCI and the remote UE identifier.
Step 210, sending the network side temporary identifier C-RNTI of the cell level of the relay UE and the cell identifier PCI of the relay UE to the remote UE, which may be implemented as:
step 210', the network side temporary identifier C-RNTI at the cell level of the relay UE and the cell identifier PCI where the relay UE is located are sent to the remote UE through the second MAC CE.
The relay UE may define the second MAC CE, specifically, define a Logical Channel Identity (LCID) of the second MAC CE, so that the relay UE can send the C-RNTI and the PCI to the remote UE through the second MAC CE.
Compared with the transmission by using a high-level signaling, the transmission of the C-RNTI and the PCI through the physical layer signaling has the advantages of less data packet decapsulation times, accurate delivery and the like, and improves the data transmission efficiency.
The relay UE in the embodiment of the invention can send the C-RNTI and the PCI to the remote UE before the remote UE sends the RRC connection request to the base station, so that the base station can establish a temporary communication channel for the remote UE according to the C-RNTI, the PCI and the remote UE identification sent by the remote UE, and the service interruption time delay is reduced.
Further, as shown in fig. 6, the method further includes:
step 220, sending communication parameters to the base station, where the communication parameters include at least one of a mapping relationship between the priority PPPP of each data packet of the adjacent service and the data radio bearer DRB, an IP address of the remote UE, security parameters, an IP address of the relay UE, and a port number used by the remote UE.
Step 220 may be performed after step 210 or may be performed in synchronization with step 210.
The relay UE sends communication parameters to the base station, and after the communication parameters comprise at least one of the mapping relation between the adjacent service per packet priority PPPP and the data radio bearer DRB, the IP address of the remote UE, the security parameters, the IP address of the relay UE and the port number used by the remote UE, the efficiency of establishing temporary communication resources for the remote UE by the base station can be improved.
Further, as shown in fig. 7, the method further includes:
step 230, if receiving the service switching message sent by the remote UE, releasing the local resource occupied by the remote UE.
Optionally, if an internet protocol IP packet with a load of 0 sent by the remote UE is received, it is determined that a service switching message sent by the remote UE is received.
Optionally, the service switching message sent by the remote UE is received by the third MAC CE.
The received service switching message indicates that the remote UE starts data transmission through a temporary communication channel established by the base station, so that the relay UE can clear and recycle resources for relay service of the remote UE, thereby reducing redundant data in the relay UE and improving the resource utilization rate of the relay UE.
Further, as shown in fig. 8, the method further includes:
and step 240, taking the first UE identity of the remote UE as a target UE identity, and sending the target UE identity to the base station through the D2D connection information.
Step 220 may be performed after step 210, may be performed simultaneously with step 210, or may be performed before step 210.
After receiving the target UE identification, the base station can determine that the communication service is provided for the remote UE corresponding to the target UE identification. After receiving an RRC connection request sent by remote UE, a base station judges whether a first UE identifier sent by the remote UE is the same as a target UE identifier, and if so, determines whether to establish a temporary communication channel for the remote UE according to a C-RNTI sent by the remote UE and a cell identifier PCI where relay UE is located.
Further, the first UE identity may be a physical address of the remote UE, i.e., Layer2 ID.
The relay UE sends the target UE identification to the base station, so that the efficiency of judging whether to allocate the temporary communication channel for the remote UE by the base station can be improved, and the service interruption time delay is further reduced.
EXAMPLE III
Fig. 9 is a flowchart of a Network connection method according to a third embodiment of the present invention, and as a further description of the first embodiment and the second embodiment, the method includes that the remote ue (remote ue), the relay ue (real ue), the base station (eNB), and the Core Network (CN) include:
step 301, the relay UE and the remote UE get in touch through the discovery process, and allocate an IP address to the remote UE.
Step 302, the relay UE establishes a DRB bearer for the Remote UE, and establishes a mapping relationship between the PPPP and the DRB of the data transmitted by the Remote UE.
Step 303, the relay UE sends the mapping relationship between the PPPP and the DRB, the layer2ID of the Remote UE, the security parameter, the IP address of the allocated Remote UE, the IP address of the relay UE and the port number used for the Remote UE to the base station for storage.
And step 304, the relay UE sends the C-RNTI and the PCI to the remote UE for storage. Step 303 and step 304 may be performed synchronously (in parallel).
Step 305, the remote end determines to switch from the relay UE to the base station.
Specifically, the remote UE measures the signal quality of the relay UE and the nearby base station. When the remote UE finds that the signal strength of the relay UE is not as good as that of the cell base station of the cell in which the relay UE is located, the relay UE is determined to be not suitable for itself any more. Optionally, the signal strength of the relay UE is calculated through the PC5 interface, and the signal strength of the base station is determined through the Uu interface.
Step 306, the remote UE sends a service switching message to the relay UE.
The remote UE informs the relay UE to leave the relay UE and performs a service switching.
Step 307, the remote UE initiates an RRC connection request to the base station where the relay UE is located. The RRC connection request carries the C-RNTI of the relay UE and the Layer2ID of the remote UE. These two pieces of information may be sent together with the RRC connection setup request in the form of a MAC CE or carried in the form of two parameters in the RRC connection setup request message.
Step 308, after receiving the RRC connection request, the base station finds that the remote UE has performed Relay access through the Relay UE served by the base station before, and then the base station temporarily replaces the function of the Relay UE to forward data for the remote UE before the DRB of the remote UE is established. The function of forwarding data here may be a manner of transferring data through the PC5 interface, or may be to establish a temporary DRB for the remote UE in an RRC connection setup message to transfer data.
The security parameters used when the base station establishes the temporary communication channel are transmitted in white text by adopting the security procedures defined in the original PC5 interface or not.
The base station may select an IP packet belonging to the remote UE by relaying the IP address of the UE and the port number of the remote UE.
And 309, the Remote UE and the MME perform a registration process and a bearer establishment process until the establishment of the conventional air interface bearer is finished.
And step 310, when the establishment of the normal air interface bearer is finished, transmitting by using the normal air interface.
Example four
Fig. 10 is a schematic structural diagram of a base station according to a fourth embodiment of the present invention, where the base station includes:
a base station receiving unit 11, configured to receive a radio resource control RRC connection request sent by a remote UE;
an obtaining unit 12, configured to obtain, when the base station receiving unit 11 receives a radio resource control RRC connection request sent by the remote UE, a first UE identity of the remote UE, a network side temporary identity C-RNTI of a cell level of a relay UE, and a cell identity PCI where the relay UE is located;
a determining unit 13, configured to determine whether to establish a temporary communication channel for the remote UE according to the first UE identity obtained by the obtaining unit 12, a network side temporary identity C-RNTI of the cell level of the relay UE, and a cell identity PCI where the relay UE is located;
a temporary communication unit 14, configured to, when the determining unit 13 determines that a temporary communication channel is established for the remote UE, perform data transmission for the remote UE through the established temporary communication channel;
a conventional communication unit 15, configured to use the conventional air interface to perform data transmission for the remote UE when the remote UE is connected over the conventional air interface.
Further, the obtaining unit 12 is specifically configured to:
analyzing a Radio Resource Control (RRC) connection request to obtain a first UE identification, a network side temporary identification (C-RNTI) of a relay UE at a cell level and a cell identification (PCI) where the relay UE is located, wherein the RRC connection request carries the first UE identification, the network side temporary identification (C-RNTI) of the relay UE at the cell level and the cell identification (PCI) where the relay UE is located; or,
and receiving a first UE identifier sent by the remote UE, a network side temporary identifier C-RNTI of a cell level of the relay UE and a cell identifier PCI of the relay UE through a first media access control unit MAC CE.
Further, the temporary communication unit 14 is specifically configured to:
and establishing a Data Radio Bearer (DRB) temporary communication channel for the remote UE.
Further, the base station receiving unit 11 is further configured to:
receiving communication parameters sent by the relay UE, wherein the communication parameters comprise at least one of a mapping relation between a priority PPPP of each data packet of adjacent service and a Data Radio Bearer (DRB), an IP address of the remote UE, security parameters, the IP address of the relay UE and a port number used by the remote UE;
the temporary communication unit 14 is further configured to establish a temporary communication channel for the UE according to the communication parameters.
Further, the base station receiving unit 11 is further configured to:
and receiving device-to-device D2D connection information sent by the relay UE, wherein the D2D connection information comprises a cell-level network side temporary identifier C-RNTI of the relay UE and a cell identifier PCI where the relay UE is located.
The device can execute the method provided by the first embodiment of the invention, and has corresponding functional modules and beneficial effects for executing the method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided in the first embodiment of the present invention.
EXAMPLE five
Fig. 11 is a schematic structural diagram of a relay user equipment according to a fifth embodiment of the present invention, where the relay user equipment is configured to provide a relay service for a remote UE, and includes:
the relay sending unit 21 is configured to send a network side temporary identifier C-RNTI at a cell level of the relay UE and a cell identifier PCI where the relay UE is located to the remote UE, so that when the remote UE determines to switch from the relay UE to a base station, the remote UE sends the network side temporary identifier C-RNTI at the cell level of the relay UE, the cell identifier PCI where the relay UE is located, and the first UE identifier of the remote UE to the base station.
Further, the relay sending unit 21 is further configured to send a communication parameter to the base station, where the communication parameter includes at least one of a mapping relationship between a proximity service Per Packet priority pppp (prose Per Packet priority) and a data radio bearer DRB, an IP address of the remote UE, a security parameter, an IP address of the relay UE, and a port number used by the remote UE.
Further, the relay sending unit 21 is specifically configured to send the network side temporary identifier C-RNTI at the cell level of the relay UE and the cell identifier PCI where the relay UE is located to the remote UE through the second mac ce.
Further, the method also comprises the following steps:
a relay receiving unit 22, configured to receive a service switching message sent by the remote UE;
a resource releasing unit 23, configured to release the local resource occupied by the remote UE if the relay receiving unit 22 receives the service switching message sent by the remote UE.
Further, the relay sending unit 21 is further configured to send the target UE identity to the base station through D2D connection information, using the first UE identity of the remote UE as the target UE identity
The device can execute the method provided by the second embodiment of the invention, and has corresponding functional modules and beneficial effects for executing the method. For details of the technique not described in detail in this embodiment, reference may be made to the method provided in the second embodiment of the present invention.
EXAMPLE six
Fig. 12 is a schematic diagram of a network connection system according to a sixth embodiment of the present invention, where the system includes a base station according to the fourth embodiment, relay user equipment (relay UE) according to the fifth embodiment, and remote user equipment (remote UE).
After establishing the D2D connection with the remote UE, the relay user equipment can send the network side temporary identifier C-RNTI of the cell level of the relay UE and the cell identifier PCI where the relay UE is located to the remote UE, and send the UE identifier of the remote UE as the target UE identifier to the base station. And when the remote UE determines to switch from the relay UE to the base station, sending an RRC connection request to the base station, and simultaneously registering the remote UE through a core network, wherein the RRC connection request can carry the C-RNTI and the PCI which are received by the remote UE from the relay UE and the first UE identification of the remote UE. And after receiving the RRC connection request, the base station determines whether to establish a temporary communication channel for the remote UE according to the C-RNTI and the PCI and a first UE identifier of the remote UE, and performs communication support for the remote UE through the temporary communication channel. Before the remote UE obtains the conventional air interface resources of the base station through the registration of the core network, the data transmission is carried out through the temporary communication channel established by the base station, so that the communication channel of the remote UE is kept smooth when the data port is switched, and the service delay is reduced.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (21)
1. A method for network connection, the method being applied to a base station and comprising:
when a Radio Resource Control (RRC) connection request sent by remote User Equipment (UE) is received, acquiring a first UE identifier of the remote UE, a network side temporary identifier (C-RNTI) of a cell level of relay UE and a cell identifier (PCI) where the relay UE is located;
determining whether to establish a temporary communication channel for the remote UE according to the first UE identifier, the network side temporary identifier C-RNTI of the cell level of the relay UE and the cell identifier PCI of the relay UE;
if a temporary communication channel is established for the remote UE, carrying out data transmission for the remote UE through the established temporary communication channel;
and when the remote UE is connected with the conventional air interface, using the conventional air interface to transmit data for the remote UE.
2. The method according to claim 1, wherein the obtaining the first UE identity of the remote UE, the network-side temporary identity C-RNTI of the cell level of the relay UE, and the cell identity PCI where the relay UE is located includes:
analyzing a Radio Resource Control (RRC) connection request to obtain a first UE identification, a network side temporary identification (C-RNTI) of a relay UE at a cell level and a cell identification (PCI) where the relay UE is located, wherein the RRC connection request carries the first UE identification, the network side temporary identification (C-RNTI) of the relay UE at the cell level and the cell identification (PCI) where the relay UE is located; or,
and receiving a first UE identifier sent by the remote UE, a network side temporary identifier C-RNTI of a cell level of the relay UE and a cell identifier PCI of the relay UE through a first media access control unit MAC CE.
3. The method of claim 1, wherein the establishing the temporary communication channel for the remote UE comprises:
and establishing a Data Radio Bearer (DRB) temporary communication channel for the remote UE.
4. The method of claim 1, further comprising, before the data transmission for the remote UE via the established temporary communication channel:
receiving communication parameters sent by the relay UE, wherein the communication parameters comprise at least one of a mapping relation between a priority PPPP of each data packet of adjacent service and a Data Radio Bearer (DRB), an IP address of the remote UE, security parameters, the IP address of the relay UE and a port number used by the remote UE;
and establishing a temporary communication channel for the UE according to the communication parameters.
5. The method according to any of claims 1 to 4, wherein when receiving a radio resource control, RRC, connection request sent by a remote UE, before obtaining a first UE identity of the remote UE, a network-side temporary identity, C-RNTI, of a cell level of a relay UE, and a cell identity, PCI, where the relay UE is located, the method further comprises:
and receiving device-to-device D2D connection information sent by the relay UE, wherein the D2D connection information comprises a cell-level network side temporary identifier C-RNTI of the relay UE and a cell identifier PCI where the relay UE is located.
6. A network connection method, applied to a relay UE for providing relay service for a remote UE, includes:
and sending the network side temporary identifier C-RNTI of the cell level of the relay UE and the cell identifier PCI of the relay UE to the remote UE, so that the remote UE sends the network side temporary identifier C-RNTI of the cell level of the relay UE, the cell identifier PCI of the relay UE and the first UE identifier of the remote UE to the base station when the remote UE determines to switch from the relay UE to the base station.
7. The method of network connection according to claim 6, further comprising:
and sending communication parameters to the base station, wherein the communication parameters comprise at least one of a mapping relation between the priority PPPP of each data packet of the adjacent service and a Data Radio Bearer (DRB), an IP address of the remote UE, security parameters, an IP address of the relay UE and a port number used by the remote UE.
8. The method according to claim 6, wherein the sending the network side temporary identity C-RNTI at the cell level of the relay UE and the cell identity PCI where the relay UE is located to the remote UE comprises:
and sending the network side temporary identifier C-RNTI of the cell level of the relay UE and the cell identifier PCI of the relay UE to the remote UE through a second media access control unit MAC CE.
9. The method of network connection according to claim 6, further comprising:
and if the service switching message sent by the remote UE is received, releasing the local resources occupied by the remote UE.
10. The method of network connection according to claim 6, further comprising:
and taking the first UE identification of the remote UE as a target UE identification, and sending the target UE identification to the base station through D2D connection information.
11. A base station, comprising:
a base station receiving unit, configured to receive a radio resource control RRC connection request sent by a remote UE;
an obtaining unit, configured to obtain, when the base station receiving unit receives a radio resource control RRC connection request sent by the remote UE, a first UE identity of the remote UE, a network side temporary identity C-RNTI of a cell level of a relay UE, and a cell identity PCI where the relay UE is located;
a determining unit, configured to determine whether to establish a temporary communication channel for the remote UE according to the first UE identity obtained by the obtaining unit, a network side temporary identity C-RNTI in a cell level of the relay UE, and a cell identity PCI in which the relay UE is located;
a temporary communication unit, configured to, when the determining unit determines that a temporary communication channel is established for the remote UE, perform data transmission for the remote UE through the established temporary communication channel;
and the conventional communication unit is used for performing data transmission on the remote UE by using the conventional air interface when the remote UE is connected with the conventional air interface.
12. The base station of claim 11, wherein the obtaining unit is specifically configured to:
analyzing a Radio Resource Control (RRC) connection request to obtain a first UE identification, a network side temporary identification (C-RNTI) of a relay UE at a cell level and a cell identification (PCI) where the relay UE is located, wherein the RRC connection request carries the first UE identification, the network side temporary identification (C-RNTI) of the relay UE at the cell level and the cell identification (PCI) where the relay UE is located; or,
and receiving a first UE identifier sent by the remote UE, a network side temporary identifier C-RNTI of a cell level of the relay UE and a cell identifier PCI of the relay UE through a first media access control unit MAC CE.
13. The base station according to claim 11, wherein the temporary communication unit is specifically configured to:
and establishing a Data Radio Bearer (DRB) temporary communication channel for the remote UE.
14. The base station of claim 11, wherein the base station receiving unit is further configured to:
receiving communication parameters sent by the relay UE, wherein the communication parameters comprise at least one of a mapping relation between a priority PPPP of each data packet of adjacent service and a Data Radio Bearer (DRB), an IP address of the remote UE, security parameters, the IP address of the relay UE and a port number used by the remote UE;
the temporary communication unit is further configured to establish a temporary communication channel for the UE according to the communication parameter.
15. The base station according to any of claims 11-14, wherein the base station receiving unit is further configured to:
and receiving device-to-device D2D connection information sent by the relay UE, wherein the D2D connection information comprises a cell-level network side temporary identifier C-RNTI of the relay UE and a cell identifier PCI where the relay UE is located.
16. A relay user equipment, wherein the relay user equipment is configured to provide a relay service for a remote UE, and the relay user equipment comprises:
the relay sending unit is used for sending the network side temporary identifier C-RNTI of the relay UE at the cell level and the cell identifier PCI where the relay UE is located to the remote UE, so that when the remote UE determines to switch from the relay UE to a base station, the remote UE sends the network side temporary identifier C-RNTI of the relay UE at the cell level, the cell identifier PCI where the relay UE is located and the first UE identifier of the remote UE to the base station.
17. The relay user equipment of claim 16, wherein the relay sending unit is further configured to send a communication parameter to the base station, and the communication parameter includes at least one of a mapping relationship between a proximity service per packet priority PPPP and a data radio bearer DRB, an IP address of the remote UE, a security parameter, an IP address of the relay UE, and a port number used by the remote UE.
18. The relay user equipment according to claim 16, wherein the relay sending unit is specifically configured to send, to the remote UE, the network side temporary identity C-RNTI in the cell level of the relay UE and the cell identity PCI where the relay UE is located through the second MAC CE.
19. The relay user equipment of claim 16, further comprising:
a relay receiving unit, configured to receive a service switching message sent by the remote UE;
and a resource releasing unit, configured to release the local resource occupied by the remote UE if the relay receiving unit receives the service switching message sent by the remote UE.
20. The relay user equipment of claim 16, wherein the relay sending unit is further configured to send the target UE identity to the base station through D2D connection information, with the first UE identity of the remote UE being the target UE identity.
21. A network connected system, characterized in that the system comprises a base station according to any of claims 11-15, a relay user equipment according to any of claims 16-20 and a remote user equipment.
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| CN201610637777.8A CN107690165A (en) | 2016-08-05 | 2016-08-05 | A kind of method of network connection, base station, trunk subscriber equipment and system |
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| CN201610637777.8A CN107690165A (en) | 2016-08-05 | 2016-08-05 | A kind of method of network connection, base station, trunk subscriber equipment and system |
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| CN201610637777.8A Pending CN107690165A (en) | 2016-08-05 | 2016-08-05 | A kind of method of network connection, base station, trunk subscriber equipment and system |
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