CN107786947A - MBMS data transmission method, donor base station, via node and system - Google Patents
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Abstract
The present invention provides a kind of MBMS data transmission method, donor base station, via node and system, belongs to communication technical field.The MBMS data transmission method includes：The first M1 interfaces are established with multimedia broadcast multi-broadcasting business gateway MBMS GW；The 2nd M1 interfaces are established with via node RN；The MBMS data sent by MBMS GW described in the first M1 interfaces；The MBMS data is sent to the RN by the 2nd M1 interfaces.MBMS data transmission method, donor base station, via node and system provided by the invention, realize transmission of the MBMS data between DeNB and RN in 3GPP protocol infrastructures.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an MBMS data transmission method, a donor base station, a relay node, and a system.
Background
In order to solve the problems of network deployment cost and coverage, standardization organizations have begun to research the introduction of Relay Nodes (RN) into cellular systems, thereby increasing network coverage. In a third generation partnership Project (3rd 3GPP) protocol architecture, a Mobility management Node (MME), a Serving-GateWay (S-GW), an evolved Node B (eNB), and a Relay Node (RN) are included.
Specifically, after the RN accesses to a cell controlled by a donor evolved node b (Doner eNB, DeNB for short), the DeNB serves as an S1/X2 proxy of the RN, so that information of S1/X2 can be forwarded between the RN and a related network element, and data transmission between the RN and the related network element is realized.
However, in the existing 3GPP protocol architecture, since the DeNB cannot transmit Multimedia Broadcast Multicast Service (MBMS) data to the relay node RN, the existing 3GPP protocol architecture cannot realize transmission of MBMS data between the DeNB and the RN.
Disclosure of Invention
The invention provides an MBMS data transmission method, a donor base station, a relay node and a system, which are used for realizing the transmission of MBMS data between a DeNB and an RN in a 3GPP protocol architecture.
The embodiment of the invention provides a Multimedia Broadcast Multicast Service (MBMS) data transmission method, which comprises the following steps:
establishing a first M1 interface with a multimedia broadcast multicast service gateway (MBMS GW);
establishing a second M1 interface with the relay node RN;
receiving MBMS data sent by the MBMS GW through the first M1 interface;
and transmitting the MBMS data to the RN through the second M1 interface.
In an embodiment of the present invention, before receiving the MBMS data sent by the MBMS GW through the first M1 interface, the method further includes:
sending a session initiation request message to the RN through a second M2 interface;
and receiving a session initiation response message sent by the RN through the second M2 interface.
In an embodiment of the present invention, before sending the session initiation request message to the RN through the second M2 interface, the method further includes:
establishing the second M2 interface with the RN.
In an embodiment of the present invention, before receiving the MBMS data sent by the MBMS GW through the first M1 interface, the method further includes:
receiving a session starting request message sent by a multi-cell multicast coordination entity MCE, wherein the session starting request message is used for requesting to send MBMS data to a donor base station DeNB;
and determining the cell identification ID as the cell controlled by the RN according to the cell identification ID in the session starting request message.
In an embodiment of the present invention, after receiving the session initiation response message sent by the RN, the method further includes:
and sending the session starting response message to a multi-cell Multicast Coordination Entity (MCE).
In an embodiment of the present invention, the sending the MBMS data to the RN through the second M1 interface includes:
transmitting the MBMS data to the RN through the second M1 interface in a point-to-point PTP mode;
or,
and transmitting the MBMS data to the RN through the second M1 interface in a point-to-multipoint PTM mode.
The embodiment of the invention also provides a method for transmitting the MBMS data of the multimedia broadcast multicast service, which comprises the following steps:
establishing a second M1 interface with a donor base station DeNB;
and receiving the MBMS data sent by the DeNB through the second M1 interface.
In an embodiment of the present invention, before receiving the MBMS data sent by the MBMS GW through the first M1 interface, the method further includes:
receiving the session initiation request message sent by the DeNB through a second M2 interface;
determining that the admission control is passed and the wireless resource of the Uu interface meets the requirement;
a session initiation response message sent to the DeNB over a second M2 interface.
In an embodiment of the present invention, before receiving, through the second M2 interface, the session initiation request message sent by the DeNB, the method further includes:
establishing the second M2 interface with the DeNB.
In an embodiment of the present invention, the receiving, by the second M1 interface, the MBMS data sent by the DeNB includes:
receiving the MBMS data sent by the DeNB through the second M1 interface in a PTP (precision time protocol) manner;
or,
and receiving the MBMS data sent by the DeNB through the second M1 interface in a PTM mode.
The embodiment of the invention also provides a donor base station DeNB, which comprises: the M1 proxy element is a proxy element,
the M1 proxy unit comprises a first interface module, a first receiving module and a first sending module;
the first interface module is used for establishing a first M1 interface with a multimedia broadcast multicast service gateway (MBMS GW);
the first interface module is further configured to establish a second M1 interface with the relay node RN;
the first receiving module is configured to receive, through the first M1 interface, MBMS data sent by the MBMS GW;
the first sending module is configured to send the MBMS data to the RN through the second M1 interface.
In one embodiment of the invention, the system also comprises an M2 proxy unit,
the M2 proxy unit comprises a second receiving module and a second sending module;
wherein, the second sending module is configured to send the session initiation request message to the RN through a second M2 interface;
the second receiving module is configured to receive, through the second M2 interface, a session initiation response message sent by the RN.
In one embodiment of the present invention, the M2 proxy unit further includes a second interface module,
the second interface module is further configured to establish the second M2 interface with the RN.
In one embodiment of the present invention, the M2 proxy element further includes a first confirmation module,
the second receiving module is further configured to receive a session initiation request message sent by a multi-cell multicast coordination entity MCE, where the session initiation request message is used to request sending of MBMS data to the DeNB;
the first confirmation module is configured to determine, according to a cell identifier ID in the session initiation request message, that the cell identifier ID is a cell controlled by the RN.
In an embodiment of the present invention, the second sending module is further configured to send the session initiation response message to a multi-cell multicast coordination entity MCE.
In an embodiment of the present invention, the first sending module is specifically configured to send the MBMS data to the RN through the second M1 interface in a point-to-point PTP (PTP) manner; or, the MBMS data is transmitted to the RN through the second M1 interface in a point-to-multipoint PTM manner.
An embodiment of the present invention further provides a relay node RN, including: the M1 interface unit is used to connect the M,
the M1 interface unit comprises a third interface module and a third receiving module;
the third interface module is configured to establish a second M1 interface with a donor base station DeNB;
the third interface module is used for establishing a second M1 interface with a donor base station DeNB;
the third receiving module is configured to receive, through the second M1 interface, the MBMS data sent by the DeNB.
In one embodiment of the present invention, the M2 interface unit further comprises a fourth receiving module, a second confirming module and a third sending module,
the fourth receiving module is further configured to receive, through a second M2 interface, a session initiation request message sent by the DeNB;
the second confirmation module is used for confirming that the admission control is passed and the wireless resource of the Uu interface meets the requirement;
the third sending module is configured to send a session initiation response message to the DeNB through a second M2 interface.
In an embodiment of the present invention, the M2 interface unit further includes a fourth interface module;
the fourth interface module is configured to establish the second M2 interface with the DeNB.
In an embodiment of the present invention, the third receiving module is specifically configured to receive, through the second M1 interface, the MBMS data sent by the DeNB in a PTP manner; or receiving the MBMS data sent by the DeNB through the second M1 interface in a PTM manner.
The embodiment of the invention also provides a system for transmitting Multimedia Broadcast Multicast Service (MBMS) data, which comprises the donor base station DeNB and the relay node RN, wherein the donor base station DeNB is described in any embodiment, and the relay node RN is described in any embodiment.
According to the MBMS data transmission method, the donor base station, the relay node and the system provided by the embodiment of the invention, the DeNB establishes a first M1 interface with the MBMS GW; and establishing a second M1 interface with the relay node RN; after the interface is established, the DeNB receives the MBMS data sent by the MBMS GW through the first M1 interface, and after receiving the MBMS data, the M1 proxy unit of the DeNB sends the MBMS data to the M2 interface unit of the RN through the second M1 interface, so that the transmission of the MBMS data between the DeNB and the RN in the 3GPP protocol architecture is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a 3GPP protocol architecture in the prior art;
fig. 2 is a flowchart illustrating a first embodiment of a MBMS data transmission method according to the present invention;
FIG. 3 is a schematic structural diagram of a 3GPP protocol architecture according to the present invention;
fig. 4 is a flowchart illustrating a second MBMS data transmission method according to an embodiment of the present invention;
FIG. 5 is a diagram of the protocol stacks of the first M1 interface and the second M1 interface of the present invention;
FIG. 6 is a diagram of the protocol stacks of the first M2 interface and the second M2 interface of the present invention;
fig. 7 is a flowchart illustrating a third MBMS data transmission method according to an embodiment of the present invention;
fig. 8 is a flowchart illustrating a fourth MBMS data transmission method according to an embodiment of the present invention;
fig. 9 is a flowchart of a fifth embodiment of a MBMS data transmission method according to the present invention;
fig. 10 is a schematic structural diagram of a donor base station DeNB according to a first embodiment of the present invention;
fig. 11 is another schematic structural diagram of a donor base station DeNB according to a first embodiment of the present invention;
fig. 12 is a schematic structural diagram of a relay node RN according to a first embodiment of the present invention;
fig. 13 is another schematic structural diagram of a relay node RN according to a first embodiment of the present invention;
fig. 14 is a schematic structural diagram of an MBMS data transmission system according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the 3GPP protocol architecture, a Mobility Management Entity (MME), a Serving-GateWay (S-GW), an evolved Node B (eNB), a donor evolved Node B (donor eNB), and a Relay Node (RN) are usually included. As shown in fig. 1, after the RN accesses to a cell controlled by the DeNB, data transmission with the RN may be implemented through an interface between the DeNB and the RN. However, the existing 3GPP protocol architecture cannot implement the transmission of MBMS data between the DeNB and the RN. In the existing 3GPP protocol architecture, the MBMS service is transmitted to the DeNB, and the DeNB broadcasts to all UEs in the cell controlled by the DeNB, but cannot transmit to the RN by the DeNB, and certainly cannot broadcast to all UEs in the cell controlled by the RN.
According to the MBMS data transmission method provided by the invention, the DeNB establishes a second M1 interface with the RN and sends the MBMS data to the RN through the second M1 interface, so that the transmission of the MBMS data between the DeNB and the RN in a 3GPP protocol architecture is realized. Hereinafter, the technical means of the present application will be described in detail by way of specific examples.
It should be noted that the following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.
Fig. 2 is a flowchart of a first embodiment of a method for transmitting MBMS data according to the present invention, which may be performed by a donor base station DeNB. Optionally, in the embodiment of the present invention, an M1 proxy unit and an M2 proxy unit may be newly added in a DeNB in advance, an M1 interface unit and an M2 interface unit are newly added in an RN, the newly added M1 proxy unit in the DeNB may establish connection with a newly added M1 interface unit in the RN through a second M1 interface, the newly added M2 proxy unit in the DeNB may establish connection with a newly added M2 interface unit in the RN through a second M2 interface, a structural schematic diagram of the present invention is shown in fig. 3, where an MME and an MCE are connected through an M3 interface, an MCE and a DeNB are connected through a first M2 interface, and an MBMS GW and a DeNB are connected through a first M1 interface, so that transmission of MBMS data between the DeNB and the RN is completed. As shown in fig. 2, the MBMS data transmission method may include:
s101, establishing a first M1 interface with a multimedia broadcast multicast service gateway (MBMS GW).
In the 3GPP protocol architecture, before transmitting MBMS data to the RN, the DeNB needs to acquire the MBMS data from the MBMS GW, before acquiring the MBMS data, a first M1 interface needs to be established between the DeNB and the MBMS GW, and after the first M1 interface is established, the DeNB can acquire the MBMS data sent by the MBMS GW through the first M1 interface.
And S102, establishing a second M1 interface with the relay node RN.
Similarly, in the 3GPP protocol architecture, before the DeNB sends the MBMS data to the RN, a second M1 interface needs to be established between the DeNB and the RN, the second M1 interface is used for transmitting the MBMS service, and after the second M1 interface is established, the DeNB can send the received MBMS data to the RN through the second M1 interface.
For example, in the embodiment of the present invention, before MBMS data transmission is performed, the M1 interface unit newly added in advance in the RN may send a second M1 interface establishment request message to the M1 proxy unit newly added in advance in the DeNB, and after the M1 proxy unit of the DeNB receives the second M1 interface establishment request message, a second M1 interface establishment response message is returned to the M1 interface unit of the RN, so that a second M1 interface is established between the M1 proxy unit of the DeNB and the M1 interface unit of the RN.
S103, receiving the MBMS data sent by the MBMS GW through the first M1 interface.
After the DeNB establishes the first M1 interface with the MBMS GW in step S101, the DeNB may receive MBMS data transmitted by the MBMS GW through the first M1 interface. Specifically, the DeNB joins the multicast group of the MBMS service through the first M1 interface according to the IP multicast group address of the MBMS service that needs to be received, and receives the MBMS service from the MBMS GW through the first M1 interface.
And S104, transmitting the MBMS data to the RN through a second M1 interface.
Similarly, in step S102, after the second M1 interface is established between the M1 proxy unit of the DeNB and the M1 interface unit of the RN, the M1 proxy unit of the DeNB may send the received MBMS data to the M1 interface unit of the RN through the second M1 interface, so as to implement transmission of the MBMS data between the DeNB and the RN in the 3GPP protocol architecture.
In the MBMS data transmission method provided by the embodiment of the invention, a DeNB and a Multimedia Broadcast Multicast Service Gateway (MBMSGW) establish a first M1 interface; and establishing a second M1 interface with the relay node RN; after the interface is established, the DeNB receives the MBMS data sent by the MBMS GW through the first M1 interface, and after receiving the MBMS data, the M1 proxy unit of the DeNB sends the MBMS data to the M2 interface unit of the RN through the second M1 interface, so that the transmission of the MBMS data between the DeNB and the RN in the 3GPP protocol architecture is realized.
Based on the embodiment corresponding to fig. 2, on the basis of the embodiment corresponding to fig. 2, further, another MBMS data transmission method is provided in the embodiment of the present invention, please refer to fig. 4, where fig. 4 is a flowchart of a second embodiment of the MBMS data transmission method of the present invention, and the MBMS data transmission method further includes:
s201, establishing a first M2 interface with the MCE.
In the 3GPP protocol architecture, before performing signaling interaction with the MCE, for example, before receiving a session initiation request message sent by the MCE, the DeNB establishes a first M2 interface with the MCE, and receives the session initiation request message sent by the MCE through the first M2 interface. Optionally, the session initiation request message may include MBMS data bearer information and a cell identification ID.
S202, establishing a second M2 interface with the RN.
To realize the transmission of MBMS data between the DeNB and the RN, a second M2 interface needs to be established between the DeNB and the RN, and after the second M2 interface is established, the DeNB may send a session initiation request message to the RN through the second M2 interface. The process of establishing the second M2 interface is similar to the process of establishing the second M1 interface, and is not described herein again.
It should be noted that there is no sequence between step S201 and step S202, step S201 may be executed first, step S202 may also be executed first, and of course, step S201 and step S202 may also be executed simultaneously, where the present invention is not limited in particular.
S203, receiving a session starting request message sent by the MCE.
Wherein the message is used for requesting to send MBMS data to the DeNB. After the first M2 interface is established, the DeNB may receive the session initiation request message sent by the MCE through the first M2 interface.
S204, determining the cell ID as the cell controlled by the RN according to the cell ID in the session starting request message.
For example, the DeNB may determine whether the cell corresponding to the cell ID is a cell controlled by the RN according to the cell ID, and if so, perform step S205.
And S205, sending a session starting request message to the RN through a second M2 interface.
After the second M2 interface is established, the M2 proxy unit of the DeNB may send a session initiation request message to the M2 interface unit of the RN through the second M2 interface.
And S206, receiving a session initiation response message sent by the RN through a second M2 interface.
After the M2 interface unit of the RN receives the session initiation request message sent by the M2 proxy unit of the DeNB through the second M2 interface, the M2 interface unit of the RN may perform admission control judgment according to the MBMS data bearer information in the session initiation request message, thereby determining whether the radio resources of the Uu interface meet the requirement of the MBMS data. Specifically, if the difference between the total resource transmitted by the Uu interface and the resource used by the Uu interface for transmitting data is greater than the resource required by the MBMS data, it is determined that admission control is passed and the radio resource of the Uu interface meets the requirement. At this time, the M2 interface unit of the RN may transmit a session initiation response message to the M2 proxy unit of the DeNB, the session initiation response message indicating that MBMS data transmission is possible. Of course, the DeNB may also perform admission judgment according to the MBMS data bearer information in the session initiation request message, where the main body of the admission judgment is not specifically limited in the present invention.
S207, sending a session starting response message to the multi-cell multicast coordination entity MCE.
After receiving a session start response message sent by an M2 interface unit of the RN through a second M2 interface, an M2 proxy unit of the DeNB determines that the RN can transmit the MBMS service, and sends the session start response message to the MCE, after receiving the session start response message, the MCE sends the session start response message to the MME, after receiving the response message of the MCE, the MME sends the session start response message to the MBMS GW, and after receiving the session start response message sent by the MME, the MBMS GW determines that IP multicast distribution can be initiated for MBMS data transmission. After step S207, steps S103 to S104 may be performed, thereby completing the transmission of MBMS data between the DeNB and the RN.
Optionally, in the embodiment of the present invention, the step S104 sends the MBMS data to the RN through the second M1 interface, where the two sending manners are a Point To Point (PTP) manner and a Point To Multipoint (PTM) manner, and certainly, the two manners are only used as examples for illustration, but the present invention is not limited thereto.
Specifically, in the process of sending MBMS data to RNs through the second M1 interface in the PTP manner, for example, when there are multiple RNs that need to receive and broadcast the same MBMS data, the DeNB sends the MBMS data to the multiple RNs respectively in the PTP manner. When any RN needs to receive and broadcast the MBMS data, the DeNB switches a General packet radio Service Tunneling protocol GTP (General packet radio Service Tunneling protocol Protoco1) tunnel which is received by the DeNB from the MBMSGW and carries the MBMS data into a GTP tunnel between the RN and the DeNB according to a one-to-one mapping mode. After mapping, the MBMS data on the GTP tunnel is processed by each layer, and finally sent to the corresponding RN through a Physical Downlink Shared Channel (PDSCH) of the Un interface. The PDSCH transmitting the MBMS data is scrambled by a Cell-radio network temporary identifier (C-RNTI), and scheduling information of the PDSCH is transmitted through a Relay Physical Downlink control channel (R-PDCCH) scrambled by the C-RNTI. And the C-RNTI is configured to the corresponding RN by the DeNB and is used for transmitting data to the RN in a dynamic scheduling mode. The DeNB may send the GTP tunnel corresponding to the MBMS data on the Un interface and other GTP tunnels with the same and similar Quality of Service (QoS) to the RN through a Data Radio Bearer (DRB) of the Un interface, so that the RN may obtain the MBMS data from the corresponding GTP tunnel and broadcast the MBMS data in the designated cell. Here, Un is a physical interface between the DeNB and the RN, and is a wireless interface. The second M1 interface and the second M2 interface defined above are both logical interfaces between the RN and the DeNB.
For example, in the embodiment of the present invention, the DeNB configures the RN and may use a CRS manner or a UE specific rs manner to demodulate the PDSCH corresponding to the RN bearer, so that the PTP manner has the following advantages:
when the DeNB configures the RN with the UE specific RS, the DeNB may send the RN with a beam forming to carry a corresponding PDSCH, so as to improve the receiving quality of the PDSCH.
Secondly, when the DeNB corresponds to multiple RNs, the MCS of the PDSCH carried by each RN of each RN may be set independently, and the DeNB may send different MBMS data to different RNs according to actual needs.
And thirdly, the M1 proxy unit in the DeNB and the M1 interface unit of the RN have no change to the 3GPP protocol architecture, and only the M1 proxy unit and the M1 interface unit are newly added to the DeNB and the RN respectively.
Specifically, in the process of sending the MBMS data to the RNs through the second M1 interface in the point-to-multipoint PTM manner, the DeNB sends the MBMS data to all RNs through the Un interface at the same time. Although this way is simple and can effectively save Un interface resources, DeNB needs to allocate a shared C-RNTI to all RNs: i.e., RN-C-RNTI, is dedicated to transmitting MBMS data. In this way, only the CRS can be used to demodulate PDSCH. The method specifically comprises the following steps: the DeNB switches a GTP tunnel carrying MBMS data on a first M1 interface between the DeNB and the MBMS GW to a new GTP tunnel according to a one-to-one mapping mode, the MBMS data on the tunnel are processed by each layer, a PDSCH scrambled by RN-C-RNTI is sent to all RNs on a physical layer, and scheduling information of the PDSCH is sent to all RNs through an R-PDCCH scrambled by the RN-C-RNTI. In addition, the DeNB may also allocate the same IP multicast group address to all MBMS data sent to the RN, so that all MBMS data share the IP multicast group address. In the case that all MBMS data share the IP multicast group address, each RN establishes an M1 interface with the DeNB at the time of RN establishment and joins the IP multicast group indicated by the IP multicast group address, so that MBMS data can be directly received.
For example, in the embodiment of the present invention, a first M1 interface between the DeNB and the MBMS GW, and a second M1 interface protocol stack between the DeNB and the RN may be as shown in fig. 5, and a first M2 interface between the DeNB and the MCE, and a second M2 interface protocol stack between the DeNB and the RN may be as shown in fig. 6 below. Specifically, the DeNB receives an M2-AP message from the MCE through a first M2 interface, processes the M2-AP message, changes a transport layer IP address in the message and the like, updates the message into an M2-AP message of a second M2 interface between the RN and the DeNB, maps the updated M2-AP message to a DRB between the RN and the DeNB, processes an RNTI, an RLC, an MAC and a PHY (physical random access memory) for the SDU on the DRB, and sends the SDU to the corresponding RN through a C-scrambled PDSCH, and simultaneously sends scheduling information of the PDSCH to the RN through the C-scrambled R-PDCCH. Wherein the C-RNTI is the RNTI allocated to the RN by the DeNB.
In the embodiment of the invention, a DeNB receives a session initiation request message sent by an MCE first, and judges whether a cell corresponding to an ID is a cell controlled by an RN according to a cell identification ID in the session initiation request message, if so, an M2 proxy unit of the DeNB can send the session initiation request message to an M2 interface unit of the RN through an established second M2 interface, and receives a session initiation response message returned by an M2 interface unit of the RN, and sends the session initiation response message to the MCE, the MCE sends the session initiation response message to an MME after receiving the response message, the MME sends the session initiation response message to an MBMSGW after receiving the response message of the MCE, the MBMS GW determines that IP multicast distribution can be initiated after receiving the session initiation response message sent by the MME to perform MBMS data transmission, and then the DeNB receives MBMS data sent by the MBMSGW through an established first M1 interface, after receiving the MBMS data, the M1 proxy unit of the DeNB transmits the MBMS data to the M2 interface unit of the RN through the second M1 interface that has been established, thereby implementing transmission of the MBMS data between the DeNB and the RN in the 3GPP protocol architecture.
Fig. 7 is a flowchart of a third embodiment of a method for transmitting MBMS data according to the present invention, which may be executed by a relay node RN. Optionally, in the embodiment of the present invention, an M1 proxy unit and an M2 proxy unit may be newly added in the DeNB in advance, an M1 interface unit and an M2 interface unit may be newly added in the RN, the newly added M1 proxy unit in the DeNB may establish a connection with the newly added M1 interface unit in the RN through a second M1 interface, and the newly added M2 proxy unit in the DeNB may establish a connection with the newly added M2 interface unit in the RN through a second M2 interface, so as to complete transmission of MBMS data between the DeNB and the RN. As shown in fig. 7, the MBMS data transmission method may include:
s301, establishing a second M1 interface with the DeNB.
Before receiving the MBMS data sent by the DeNB, the RN needs to establish a second M1 interface with the DeNB, where the second M1 interface is used for transmitting the MBMS service, and after the second M1 interface is established, the RN may receive the MBMS data sent by the DeNB through the second M1 interface. After the RN accesses the DeNB, the RN initiates the second M1 interface establishment request message to establish the second M1 interface.
For example, in the embodiment of the present invention, before MBMS data transmission is performed, the M1 interface unit newly added in advance in the RN may send a second M1 interface establishment request message to the M1 proxy unit newly added in advance in the DeNB, and after the M1 proxy unit of the DeNB receives the second M1 interface establishment request message, a second M1 interface establishment response message is returned to the M1 interface unit of the RN, so that a second M1 interface is established between the M1 proxy unit of the DeNB and the M1 interface unit of the RN.
S302, receiving the MBMS data sent by the DeNB through a second M1 interface.
After the second M1 interface is established between the M1 interface unit of step S301RN and the M1 proxy unit of the DeNB, the M1 interface unit of the RN may receive the MBMS data sent by the M1 proxy unit of the DeNB through the second M1 interface, thereby implementing the transmission of the MBMS data between the DeNB and the RN in the 3GPP protocol architecture.
In the MBMS data transmission method provided in the embodiment of the present invention, a second M1 interface is established between an M1 interface unit of an RN and an M1 proxy unit of a DeNB; after the second M1 interface is established, the M1 interface unit of the RN receives the MBMS data sent by the M1 proxy unit of the DeNB through the second M1 interface, thereby implementing the transmission of the MBMS data between the DeNB and the RN in the 3GPP protocol architecture.
Based on the embodiment corresponding to fig. 7, on the basis of the embodiment corresponding to fig. 7, further, another MBMS data transmission method is provided in the embodiment of the present invention, please refer to fig. 8, where fig. 8 is a flowchart of a fourth embodiment of the MBMS data transmission method of the present invention, and the MBMS data transmission method further includes:
s401, establishing a second M2 interface with the DeNB.
To realize the transmission of MBMS data between the DeNB and the RN, a second M2 interface needs to be established between the DeNB and the RN, and after the second M2 interface is established, the RN may receive a session initiation request message sent by the DeNB through the second M2 interface. The second M2 interface may be triggered to be established by the RN by transmitting a second M2 interface establishment request message immediately after the RN accesses the DeNB.
S402, receiving a session starting request message sent by the DeNB through a second M2 interface.
After the second M2 interface is established, the M2 interface unit of the RN may receive the session initiation request message sent by the M2 proxy unit of the DeNB through the second M2 interface. The session initiation request message may include MBMS data bearer information and a cell identification ID.
S403, determining that the admission control is passed and the wireless resource of the Uu interface meets the requirement.
After the M2 interface unit of the RN receives the session initiation request message sent by the M2 proxy unit of the DeNB through the second M2 interface, the M2 interface unit of the RN may perform admission control judgment according to the MBMS data bearer information in the session request message, thereby determining whether the radio resources of the Uu interface meet the requirement of the MBMS data. The method for determining admission control is similar to the method for determining admission control in the second embodiment, and reference may be specifically made to the description in the second embodiment, which is not repeated herein.
And S404, sending a session starting response message to the DeNB through the second M2 interface.
After the M2 interface unit of the RN performs admission judgment, a session initiation response message is sent to the M2 proxy unit of the DeNB through the second M2 interface, so that the M2 proxy unit of the DeNB sends the session initiation response message to the MCE after receiving the session initiation response message, the MCE sends the session initiation response message to the MME after receiving the session initiation response message, the MME sends the session initiation response message to the MBMS GW after receiving the session initiation response message, and the MBMS GW determines that IP multicast allocation can be initiated for MBMS data transmission after receiving the session initiation response message.
Optionally, receiving, by the DeNB through the second M1 interface, MBMS data sent by the DeNB includes:
receiving MBMS data sent by the DeNB through a second M1 interface by adopting a PTP mode; or receiving the MBMS data sent by the DeNB through a second M1 interface by adopting a PTM mode. In this embodiment of the present invention, the specific process of the two manners of receiving, by the RN, the MBMS data sent by the DeNB through the second M1 interface is similar to the specific process of the two manners of sending, by the DeNB, the MBMS data to the RN through the second M1 interface in the second embodiment, which may be specifically referred to the description in the second embodiment, and no further description is given in this embodiment of the present invention.
Based on the embodiment shown in any one of fig. 2 to fig. 8, further, another MBMS data transmission method is further provided in the present invention, please refer to fig. 9, where fig. 9 is a flowchart of a fifth embodiment of the MBMS data transmission method of the present invention, and the MBMS data transmission method further includes:
s501, the group communication system application server GCS AS sends a temporary mobile group identification TMGI allocation request message to the broadcast multicast service center BMSC.
When the GCS AS prepares to send MBMS data by the MBMS bearer, a TMGI allocation request message is sent to the BMSC, and the allocation request message is used for requesting the BMSC to allocate the TMGI to the MBMS bearer.
S502, the BMSC returns a temporary mobile group identification distribution response message to the GCS AS.
Wherein, the allocation response message includes that the BMSC allocates TMGI for the MBMS bearer. Specifically, after receiving the TMGI allocation request message sent by the GCSAS, the BMSC allocates the TMGI to the MBMS bearer according to the TMGI allocation request message, and carries the TMGI corresponding to the MBMS bearer in the TMGI allocation response message, and returns the TMGI to the GCS AS.
S503, the GCS AS sends the MBMS bearing activation request message to the BMSC.
Before GCS AS sends MBMS data through MBMS bearer, GCS AS sends MBMS bearer activation request message to BMSC, the MBMS bearer activation request message is used to instruct BMSC to allocate resources for the MBMS bearer.
S504, the BMSC sends a conversation starting request message to the MBMS GW.
After receiving the MBMS bearer activation request message sent by the GCS AS, the BMSC allocates a stream identifier to the MBMS bearer, where the stream identifier is used to mark the MBMS bearer and send a session initiation request message to the MBMS GW.
S505, the MBMS GW returns a conversation starting response message to the BMSC.
After receiving the session start request message, the MBMS GW generates an MBMS bearer context for the MBMS bearer, and returns a session start response message to the BMSC, where the session start response message carries configuration information of the MBMS bearer.
S506, the BMSC returns the MBMS bearing activation response message to the GCS AS.
After receiving the session start response message sent by the MBMS GW, the BMSC returns an MBMS bearer activation response message to the GCS AS, where the MBMS bearer activation response message is used to indicate that the MBMS bearer is activated.
S507, the MBMS GW sends a conversation starting request message to the mobility management entity MME.
It should be noted that, there is no sequence between step S505 and step S507, step S505 may be executed first, step S507 may also be executed first, and of course, step S505 and step S507 may also be executed simultaneously.
S508, the MME sends a session start request message to the multi-cell multicast coordination entity MCE through an M3 interface.
After receiving the session start request message sent by the MBMS GW, the MME generates an MBMS bearer context according to the session start request message, and sends the session start request message to the MCE.
S509, the MCE sends a session initiation request message to the DeNB through the first M2 interface.
The MCE may pre-establish a first M2 interface with the DeNB, and after the first M2 interface is established, the MCE may send a session initiation request message to the DeNB through the M2 interface.
After receiving the session start request message, the MCE generates an MBMS bearer context according to the session start request message, and sends the session start request message to the DeNB.
S510, the DeNB joins the IP multicast group of the MBMS data.
And after receiving the session starting request message, the DeNB joins the IP multicast group of the MBMS data.
S511, the M2 proxy unit of the DeNB sends a session initiation request message to the M2 interface unit of the RN through the second M2 interface.
After receiving the session initiation request message, the DeNB determines whether a cell corresponding to the cell ID is a cell controlled by the RN according to the cell ID in the session initiation request message, and if so, the M2 proxy unit of the DeNB sends the session initiation request message to the M2 interface unit of the RN through the second M2 interface. Wherein, a second M2 interface may be established between the M2 proxy unit of the DeNB and the M2 interface unit of the RN in advance.
S512, the RN joins the IP multicast group of the MBMS data.
And after receiving the session starting request message, the RN joins the IP multicast group of the MBMS data.
S513, the M2 interface unit of the RN returns a session start response message to the M2 proxy unit of the DeNB.
After receiving the session start request message, the M2 interface unit of the RN performs admission judgment according to the MBMS data bearer information in the session request message, and returns a session start response message to the M2 proxy unit of the DeNB through the second M2 interface when it is determined that admission control passes and the radio resource of the Uu interface meets the requirement.
It should be noted that, there is no sequence between step S513 and step S512, step S512 may be executed first, step S513 may also be executed first, and of course, step S512 and step S513 may also be executed simultaneously.
And S514, the DeNB sends a session starting response message to the MCE through the first M2 interface.
The M2 proxy unit of the DeNB sends a session initiation response message through the first M2 interface MCE after receiving the session initiation response message.
S515, the MCE sends a session initiation response message to the MME through the M3 interface.
After receiving the session initiation response message, the MCE sends the session initiation response message to the MME through the M3 interface.
S516, the MME sends a conversation starting response message to the MBMS GW.
After receiving the session start response message, the MME sends a session start response message to the MBMS GW.
S517 and GCS AS send MBMS data to MBMS GW.
S518, the MBMS GW transmits MBMS data to the DeNB through the first M1 interface.
The MBMS GW may pre-establish a first M1 interface with the DeNB, and after the first M1 interface is established, the MBMS GW may transmit MBMS data to the DeNB through the M1 interface.
And S519, the M2 proxy unit of the DeNB transmits the MBMS data to the M2 interface unit of the RN through a second M1 interface.
The M2 proxy unit of the DeNB transmits the MBMS data to the M1 interface unit of the RN through the second M1 interface after receiving the MBMS data. The second M1 interface may be established in advance between the M1 proxy unit of the DeNB and the M1 interface unit of the RN, so as to implement transmission of MBMS data between the DeNB and the RN in a 3GPP protocol architecture.
S520, the M1 interface unit of the RN broadcasts after receiving the MBMS data.
After receiving the MBMS data, the M1 interface unit of the RN may broadcast the MBMS data in the cell controlled by the RN.
The implementation principle and the beneficial effects of the MBMS data transmission method according to the embodiment of the present invention are similar to those of any of the above embodiments, and are not described herein again.
Fig. 10 is a schematic structural diagram of a donor base station DeNB60 according to a first embodiment of the present invention, please refer to fig. 10, where the donor base station DeNB60 may include: the M1 proxy unit 601, the M1 proxy unit 601 includes a first interface module 6011, a first receiving module 6012, and a first transmitting module 6013.
The first interface module 6011 is configured to establish a first M1 interface with a multimedia broadcast multicast service gateway MBMS GW.
The first interface module 6011 is further configured to establish a second M1 interface with the relay node RN.
A first receiving module 6012, configured to receive the MBMS data sent by the MBMS GW through the first M1 interface.
A first sending module 6013, configured to send the MBMS data to the RN through the second M1 interface.
The donor base station DeNB60 in the embodiment of the present invention may implement the technical solution shown in the first embodiment of the method, and the implementation principle and the beneficial effects thereof are similar and will not be described herein again.
Optionally, the DeNB60 further includes an M2 proxy unit 602, as shown in fig. 11, the M2 proxy unit 602 includes a second receiving module 6021 and a second sending module 6022.
Wherein, the second sending module 6022 is configured to send the session start request message to the RN through the second M2 interface.
A second receiving module 6021, configured to receive the session initiation response message sent by the RN through the second M2 interface.
Optionally, the M2 proxy unit 602 further includes a second interface module 6023, the second interface module 6023 being configured to establish a second M2 interface with the RN.
Optionally, the M2 proxy unit 602 further includes a first confirmation module 6024.
The second receiving module 6021 is further configured to receive a session initiation request message sent by the MCE, where the session initiation request message is used to request that MBMS data be sent to the DeNB 60.
A first confirming module 6024, configured to determine, according to the cell identifier ID in the session initiation request message, that the cell identifier ID is a cell controlled by the RN.
Optionally, the second sending module 6022 is further configured to send a session initiation response message to the multi-cell multicast coordination entity MCE.
Optionally, the first sending module 6013 is specifically configured to send the MBMS data to the RN through the second M1 interface in a point-to-point PTP (PTP) manner. Or, the MBMS data is transmitted to the RN through a second M1 interface by adopting a point-to-multipoint PTM mode.
The donor base station DeNB60 in the embodiment of the present invention may implement the technical solution shown in the second embodiment of the method, and the implementation principle and the beneficial effects thereof are similar and will not be described herein again.
Fig. 12 is a schematic structural diagram of a relay node RN70 according to a first embodiment of the present invention, please refer to fig. 12, where the relay node RN70 may include:
the M1 interface unit 701 includes a third interface module 7011 and a third receiving module 7012.
The third interface module 7011 is configured to establish a second M1 interface with the donor base station DeNB.
A third receiving module 7012, configured to receive the MBMS data sent by the DeNB through the second M1 interface.
The RN70 shown in the embodiment of the present invention may implement the technical solution shown in the first embodiment of the method, and its implementation principle and beneficial effect are similar, which are not described herein again.
Optionally, the RN70 further includes an M2 interface unit 702, and the M2 interface unit 702 includes a fourth receiving module 7021, a second confirming module 7022 and a third sending module 7023, as shown in fig. 13.
A fourth receiving module 7021, configured to receive, through the second M2 interface, a session initiation request message sent by the DeNB.
A second confirming module 7022, configured to determine that admission control passes and that radio resources of the Uu interface meet the requirement.
A third sending module 7023, configured to send the session initiation response message to the DeNB through the second M2 interface.
Optionally, the M2 interface unit 702 further includes a fourth interface module 7024; a fourth interface module 7024, configured to establish a second M2 interface with the DeNB.
Optionally, the third receiving module 7012 is specifically configured to receive, by using a PTP method, MBMS data sent by the DeNB through the second M1 interface. Or receiving the DeNB to send the MBMS data through a second M1 interface by adopting a PTM mode.
The RN70 shown in the embodiment of the present invention may implement the technical solution shown in the second method embodiment, which has similar implementation principles and beneficial effects, and is not described herein again.
Fig. 14 is a schematic structural diagram of a first embodiment of a MBMS data transmission system according to the present invention, please refer to fig. 14, where the MBMS data transmission system may include:
the donor base station DeNB60 in any of the above embodiments, and the relay node RN70 in any of the above embodiments.
The MBMS data transmission system according to the embodiment of the present invention may implement the technical solutions according to any of the above method embodiments, and the implementation principle and the beneficial effects thereof are similar, and are not described herein again.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (21)
1. A method for transmitting Multimedia Broadcast Multicast Service (MBMS) data is characterized by comprising the following steps:
establishing a first M1 interface with a multimedia broadcast multicast service gateway (MBMS GW);
establishing a second M1 interface with the relay node RN;
receiving MBMS data sent by the MBMS GW through the first M1 interface;
and transmitting the MBMS data to the RN through the second M1 interface.
2. The method of claim 1, wherein before receiving the MBMS data sent by the MBMSGW through the first M1 interface, the method further comprises:
sending a session initiation request message to the RN through a second M2 interface;
and receiving a session initiation response message sent by the RN through the second M2 interface.
3. The method of claim 2, wherein before sending the session initiation request message to the RN through the second M2 interface, the method further comprises:
establishing the second M2 interface with the RN.
4. The method of claim 1, wherein before receiving the MBMS data sent by the MBMSGW through the first M1 interface, the method further comprises:
receiving a session starting request message sent by a multi-cell multicast coordination entity MCE, wherein the session starting request message is used for requesting to send MBMS data to a donor base station DeNB;
and determining the cell identification ID as the cell controlled by the RN according to the cell identification ID in the session starting request message.
5. The method of claim 2, wherein after receiving the session initiation response message sent by the RN, the method further comprises:
and sending the session starting response message to a multi-cell Multicast Coordination Entity (MCE).
6. The method of any of claims 1-5, wherein the sending the MBMS data to the RN through the second M1 interface comprises:
transmitting the MBMS data to the RN through the second M1 interface in a point-to-point PTP mode;
or,
and transmitting the MBMS data to the RN through the second M1 interface in a point-to-multipoint PTM mode.
7. A method for transmitting Multimedia Broadcast Multicast Service (MBMS) data is characterized by comprising the following steps:
establishing a second M1 interface with a donor base station DeNB;
and receiving the MBMS data sent by the DeNB through the second M1 interface.
8. The method of claim 7, wherein before the receiving the MBMS data sent by the DeNB through the second M1 interface, the method further comprises:
receiving a session start request message sent by the DeNB through a second M2 interface;
determining that the admission control is passed and the wireless resource of the Uu interface meets the requirement;
sending a session initiation response message to the DeNB through a second M2 interface.
9. The method of claim 8, wherein before receiving the session initiation request message sent by the DeNB through the second M2 interface, the method further comprises:
establishing the second M2 interface with the DeNB.
10. The method of any one of claims 7-9, wherein the receiving the MBMS data sent by the DeNB through the second M1 interface comprises:
receiving the MBMS data sent by the DeNB through the second M1 interface in a PTP (precision time protocol) manner;
or,
and receiving the MBMS data sent by the DeNB through the second M1 interface in a PTM mode.
11. A donor base station, DeNB, comprising: the M1 proxy element is a proxy element,
the M1 proxy unit comprises a first interface module, a first receiving module and a first sending module;
the first interface module is used for establishing a first M1 interface with a multimedia broadcast multicast service gateway (MBMS GW);
the first interface module is further configured to establish a second M1 interface with the relay node RN;
the first receiving module is configured to receive, through the first M1 interface, MBMS data sent by the MBMS GW;
the first sending module is configured to send the MBMS data to the RN through the second M1 interface.
12. The DeNB of claim 11, further comprising an M2 proxy element,
the M2 proxy unit comprises a second receiving module and a second sending module;
the second sending module is configured to send a session initiation request message to the RN through a second M2 interface;
the second receiving module is configured to receive, through the second M2 interface, a session initiation response message sent by the RN.
13. The DeNB of claim 12, wherein the M2 proxy unit further includes a second interface module,
the second interface module is configured to establish the second M2 interface with the RN.
14. The DeNB of claim 13, wherein the M2 proxy element further comprises a first confirmation module,
the second receiving module is further configured to receive a session initiation request message sent by a multi-cell multicast coordination entity MCE, where the session initiation request message is used to request sending of MBMS data to the DeNB;
the first confirmation module is configured to determine, according to a cell identifier ID in the session initiation request message, that the cell identifier ID is a cell controlled by the RN.
15. The DeNB of claim 12,
the second sending module is further configured to send the session initiation response message to a multi-cell multicast coordination entity MCE.
16. The DeNB according to any one of claims 11-15,
the first sending module is specifically configured to send the MBMS data to the RN through the second M1 interface in a point-to-point PTP (PTP) manner; or, the MBMS data is transmitted to the RN through the second M1 interface in a point-to-multipoint PTM manner.
17. A Relay Node (RN), comprising: the M1 interface unit is used to connect the M,
the M1 interface unit comprises a third interface module and a third receiving module;
the third interface module is configured to establish a second M1 interface with a donor base station DeNB;
the third receiving module is configured to receive, through the second M1 interface, the MBMS data sent by the DeNB.
18. The RN of claim 17, further comprising an M2 interface unit, the M2 interface unit comprising a fourth receiving module, a second acknowledging module, and a third transmitting module,
the fourth receiving module is further configured to receive, through a second M2 interface, a session initiation request message sent by the DeNB;
the second confirmation module is used for confirming that the admission control is passed and the wireless resource of the Uu interface meets the requirement;
the third sending module is configured to send a session initiation response message to the DeNB through a second M2 interface.
19. The RN of claim 18, wherein the M2 interface unit further comprises a fourth interface module;
the fourth interface module is configured to establish the second M2 interface with the DeNB.
20. The RN according to any of claims 17 to 19,
the third receiving module is specifically configured to receive, by using a PTP method through the second M1 interface, the MBMS data sent by the DeNB; or receiving the MBMS data sent by the DeNB through the second M1 interface in a PTM manner.
21. A MBMS data transmission system comprising the donor base station DeNB of any one of claims 11 to 16 and the relay node RN of any one of claims 17 to 20.
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| CN114499771A (en) * | 2020-11-13 | 2022-05-13 | 成都鼎桥通信技术有限公司 | Feedback and retransmission method and device of ACK/NACK information of MBS |
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