CN101488865B - Multimedia broadcast multicast service transmission method, apparatus and base station node - Google Patents
Multimedia broadcast multicast service transmission method, apparatus and base station node Download PDFInfo
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Abstract
The present invention provides an MBMS service transmission method comprising: determining a single frequency network SFN area and a position in the SFN area of each base station node in the SFN area by an upstream node of the base station node; determining the transmission power or the power factor corresponding to the base station node according to the position information of the base station node; then performing the synchronous transmitting of the multimedia broadcast multicast service (MBMS service) with the corresponding transmission power by the base station node. The invention simultaneously provides an apparatus and base station node for implementing the MBMS service transmission, the MBMS service data transmission quality can be ensured, meanwhile the interference for the district inside of the protection area caused by the SFN area can be decreased.
Description
Technical Field
The present invention relates to a Multimedia Broadcast Multicast Service (MBMS) transmission technology based on a Single Frequency Network (SFN) transmission mode, and in particular, to a method, an apparatus, and a base station node for transmitting a MBMS service.
Background
MBMS is a newly added service in the third generation partnership project (3GPP) R6 standard, and the purpose of the MBMS service is to provide multi-users with multimedia data that can be downloaded from a point-to-multipoint unidirectional manner in a very efficient, economical, and shared manner. The MBMS service is highly valued by operators and equipment manufacturers as one of the most attractive service models in the next generation mobile communication field.
The MBMS service comprises an SFN transmission mode, in the SFN transmission mode, a plurality of cells in an SFN area transmit the same information on the same carrier wave and time-frequency domain resources, and a terminal receives the same information transmitted by the plurality of cells to realize downlink macro diversity, thereby obtaining high receiving signal-to-noise ratio and transmitting the MBMS service with higher speed in the SFN transmission mode. Wherein the SFN area refers to: the coverage area of a certain broadcast service. The individual cells in an SFN area are geographically required to be contiguous.
In the prior art, an MBMS service transmission flow based on an SFN transmission mode is shown in fig. 1, and the method includes:
step 101: the core network determines the extent of the SFN area.
The determination of the SFN area range may be performed by performing operation, maintenance and configuration according to the service characteristics, or through other related procedures.
Step 102: and the core network performs uniform resource allocation on the cells in the determined SFN area range and sends resource allocation information to the base station nodes corresponding to the cells.
Here, the base station node includes: a base station NodeB, or an evolved base station e-NodeB.
Step 103: and each base station node configures a broadcast service channel according to the resource allocation information sent by the core network.
Step 104: each base station node uses the maximum transmission power or the specified fixed power to synchronously transmit the broadcast service on the broadcast service channel.
In step 102, since the core network performs uniform resource allocation on each cell, in this step, each base station node performs synchronous transmission of the broadcast service on the same resource.
As can be seen from the above description, all base station nodes in the SFN area range are uniformly allocated to the same resource to synchronously transmit the same signal, and the power of the signal obtained by combining the same signals is relatively high, but the above effects will bring relatively high interference to the peripheral area around the SFN area while improving the signal-to-noise ratio of the received signal of the terminal in the SFN area range, so that the cells located in the peripheral area around the SFN area cannot normally transmit data.
As shown in fig. 2, the area included in the graph 210 is an area in which synchronization has been achieved in the network, the area included in the graph 220 is a maximum usable SFN area, the wide stripe filled area 230 is a determined SFN area, and the fine stripe filled ring area 240 is a peripheral area of the periphery of the area 230, which is also referred to as a protection area of the SFN area, and when all base station nodes in the area 230 transmit MBMS service data in an SFN transmission manner, the base station nodes in the area 240 cannot normally transmit data due to large interference.
Disclosure of Invention
In view of the above, the present invention provides an MBMS service transmission method, an apparatus and a base station node for implementing MBMS service data transmission, which can reduce interference of an SFN area to a cell in a protected area of the SFN area while ensuring the quality of MBMS service data transmission.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the invention provides a multimedia broadcast multicast service transmission method, which comprises the following steps:
A. determining a single frequency network SFN area and the position of each base station node in the SFN area by an upstream node of the base station node;
B. determining the transmitting power corresponding to the corresponding base station node according to the position information of the base station node;
C. and the base station node synchronously transmits the MBMS service data with corresponding transmission power.
Wherein the base station node is: a base station NodeB, or an evolved base station e-NodeB;
correspondingly, the upstream node of the base station node is specifically:
when the base station node is a NodeB, an upstream node of the base station node is a core network or a radio network controller RNC;
and when the base station node is the e-NodeB, the upstream node of the base station node is an access gateway AGW.
The determining the position of each base station node in the SFN area specifically includes:
determining whether each base station node is located at the edge of the SFN area; or,
it is determined that each base station node is located in the center, middle, or edge of the SFN area.
The transmission power of the determined base station node in the step B is determined by an upstream node of the base station node;
correspondingly, step B further comprises:
an upstream node of a base station node performs uniform resource allocation on the base station node in the SFN area and sends a generated resource allocation message to the corresponding base station node, wherein the resource allocation message comprises: the resource allocation result, and the transmitting power or power factor and/or position information corresponding to the base station node corresponding to the resource allocation information; or,
an upstream node of the base station node generates a position information signaling according to the transmitting power or power factor and/or position information corresponding to the base station node and sends the position information signaling to the corresponding base station node; and the upstream node of the base station node performs uniform resource allocation to the base station nodes in the SFN area and sends the generated resource allocation message to the corresponding base station nodes.
When the resource allocation information or the location information signaling contains a power factor, the determining of the transmission power in step B is: and the base station node calculates the corresponding transmitting power according to the power factor.
The transmitting power of the determined base station node in the step B is determined by the base station node;
correspondingly, step a further comprises:
an upstream node of the base station node generates a position information signaling according to the position information corresponding to the base station node and sends the position information signaling to the corresponding base station node, and the upstream node of the base station node performs uniform resource allocation on the base station node in the SFN area and sends the generated resource allocation message to the corresponding base station node; or,
the upstream node of the base station node performs uniform resource allocation on the base station nodes in the SFN area and sends the generated resource allocation message to the corresponding base station node; wherein the resource allocation information includes: the resource allocation result and the corresponding position information of the base station node corresponding to the resource allocation information;
correspondingly, the step B specifically comprises the following steps: the base station node determines the corresponding transmitting power according to the position information signaling; or,
and the base station node determines the power factor corresponding to the base station node according to the position information signaling, and determines the transmitting power corresponding to the base station node according to the determined power factor.
The synchronous transmission of the base station node is specifically: the synchronous transmission is performed using a method in which a dedicated carrier and a mixed carrier are combined.
The special carrier and the mixed carrier are combined into: the dedicated carrier is compensated by the hybrid carrier or the hybrid carrier is compensated by the dedicated carrier.
When the time slot structure of the mixed carrier and the time slot structure of the special carrier are completely the same, the combination of the special carrier and the mixed carrier reserves the combination of a physical layer and the combination of a media access control layer MAC and a radio link control layer RLC;
and when the time slot structure of the mixed carrier and the time slot structure of the special carrier are not identical, the combination of the special carrier and the mixed carrier only reserves the combination of the MAC layer and the RLC layer.
The invention also provides a device for realizing the transmission of the multimedia broadcast multicast service, which comprises: an area determination module, a location determination module, wherein,
the system comprises an area determining module, a position determining module and a service processing module, wherein the area determining module is used for determining an SFN area according to service characteristics and sending the determined SFN area information to the position determining module;
and the position determining module is used for determining the position information of each base station node in the SFN area.
Wherein the location determination module is further to: sending the position information to a resource allocation module;
the region determination module is further to: sending the SFN area information to a resource allocation module;
correspondingly, the device further comprises a resource allocation module and a data transmission module, wherein,
the resource allocation module is used for uniformly allocating resources to the base station nodes in the SFN area, generating resource allocation information according to the received position information and the resource allocation result and sending the resource allocation information to the data sending module;
and the data sending module is used for sending the received resource allocation information to the corresponding base station node.
The location determination module is further to: generating a position information signaling according to the position information and sending the position information signaling to a data sending module;
correspondingly, the device further comprises:
and the data receiving module is used for sending the received position information signaling to the corresponding base station node.
The location determination module is further to: and determining the corresponding transmitting power or power factor of the base station node according to the position information.
The location determination module is further to: sending the position information and/or the transmitting power or the power factor to a resource allocation module;
the region determination module is further to: sending the SFN area information to a resource allocation module;
correspondingly, the device further comprises a resource allocation module and a data transmission module, wherein,
the resource allocation module is used for uniformly allocating resources to the base station nodes in the SFN area, generating resource allocation information according to the received position information, and/or the received transmitting power or power factor and the resource allocation result, and sending the resource allocation information to the data sending module;
and the data sending module is used for sending the received resource allocation information to the corresponding base station node.
The location determination module is further to: generating a position information signaling according to the position information and/or the transmitting power or the power factor and sending the position information signaling to a data sending module;
correspondingly, the device further comprises:
and the data receiving module is used for sending the received position information signaling to the corresponding base station node.
The region determination module is further to: sending the SFN area information to a resource allocation module;
correspondingly, the device further comprises:
the resource allocation module is used for uniformly allocating resources to the base station nodes in the SFN area, generating resource allocation information and sending the resource allocation information to the data sending module;
correspondingly, the data sending module is further configured to: and sending the received resource allocation information to the corresponding base station node.
The invention also provides a base station node for realizing the transmission of the multimedia broadcast multicast service, which comprises: a data receiving module, a channel configuration module, and a power determination module, wherein,
the data receiving module is used for receiving resource allocation information sent by an upstream node of the base station node and sending the resource allocation information to the channel configuration module;
a channel configuration module, configured to configure a broadcast service channel according to the resource allocation information;
and the power determining module is used for determining the transmitting power of the base station node to which the power determining module belongs.
The resource configuration information includes: the resource allocation result, and the position information and/or the transmitting power or the power factor corresponding to the base station node corresponding to the resource allocation information;
correspondingly, the data receiving module is further configured to: sending the received resource configuration information to a power determining module; and the power determining module determines the transmitting power of the base station node to which the power determining module belongs according to the position information and/or the transmitting power or the power factor in the resource configuration information.
The data receiving module is further configured to: receiving a position information signaling sent by an upstream node of a base station node, and sending the signaling to a power determination module;
correspondingly, the power determining module determines the transmitting power of the base station node to which the power determining module belongs according to the position information and/or the transmitting power or the power factor corresponding to the base station node contained in the signaling.
The channel configuration module is further configured to: sending the configuration result to a data sending module;
the power determination module is further to: sending the determined transmitting power to a data sending module;
correspondingly, the base station node further comprises:
and the data sending module is used for transmitting the MBMS service data according to the received configuration result and the transmitting power.
The MBMS service transmission method, the MBMS service transmission device and the base station node provided by the invention have the advantages that the upstream node of the base station node allocates resources for the base station node in the SFN area, and simultaneously, the position of each base station node in the SFN area is determined, so that the corresponding transmission power is determined for each base station node, the base station node positioned at the edge of the SFN area uses smaller transmission power to transmit MBMS service data, and the interference of the SFN area to cells in a protection area of the SFN area is reduced. In addition, when the base station node at the edge of the SFN area uses smaller transmission power to transmit the service data, the quality of receiving the MBMS service data by the terminal at the edge of the SFN area is ensured by the method of combining the special carrier and the mixed carrier.
Drawings
Fig. 1 is a schematic flow chart of an MBMS service transmission method based on an SFN transmission mode in the prior art;
fig. 2 is a schematic diagram of an SFN area and an SFN protection area location;
fig. 3 is a schematic diagram of an implementation flow of the MBMS service transmission method of the present invention;
fig. 4 is a schematic diagram illustrating an implementation method of compensating a dedicated carrier by a hybrid carrier according to the present invention;
fig. 5 is a schematic diagram illustrating an implementation method of compensating a hybrid carrier by using a dedicated carrier according to the present invention;
fig. 6A and fig. 6B are schematic structural diagrams of an apparatus for implementing MBMS service data transmission according to the present invention;
fig. 7 is a schematic diagram of a node structure of a base station for implementing MBMS service data transmission according to the present invention.
Detailed Description
The basic idea of the invention is: after the SFN area is determined, the positions of the base station nodes in the SFN area are determined while the resources are uniformly distributed to the base station nodes; and determining the transmitting power of each base station node for transmitting the broadcast data according to the position information, wherein the base station nodes positioned at the edge of the SFN area transmit the broadcast data with smaller transmitting power. In addition, when the base station node transmits the broadcast data, the method of combining the special carrier and the mixed carrier is used to ensure the quality of the terminal at the edge of the SFN area for receiving the MBMS data.
The following describes in detail implementation of the MBMS service transmission method, apparatus, and base station node according to embodiments of the present invention with reference to the accompanying drawings.
Fig. 3 is a schematic diagram of an implementation flow of the MBMS service transmission method of the present invention, and as shown in fig. 3, the method includes:
step 301: an upstream node of the base station nodes determines the SFN area.
When the base station node is a NodeB, the upstream node of the base station node may be a core network, or a Radio Network Controller (RNC), and the like; when the base station node is an e-NodeB, an upstream node of the base station node may be an Access Gateway (AGW) or the like.
The determination of the SFN area may be performed by performing operation, maintenance and configuration according to the service characteristics or through other related procedures.
Step 302: the upstream node of the base station node determines the position of each base station node in the SFN area, performs uniform resource allocation on the base station nodes in the SFN area, and then sends resource allocation information to the corresponding base station nodes.
Wherein the base station node comprises: NodeB, or e-NodeB.
There are various methods for dividing the location of the base station node in the SFN area, for example, the method may be divided into: the edge of the SFN area and the center of the SFN area; or the center, middle or edge of an SFN area, etc. Accordingly, the determination of the location of the base station node within the SFN area may also be divided into a plurality of cases according to the location division method. The specific manner how the upstream node of the base station node determines the specific position of the base station node in the SFN area under the corresponding partitioning method may use the existing related technology, and details are not repeated here.
The following describes in detail the operations that need to be completed by the upstream node of the base station node after determining the position of the base station node in the SFN area, respectively by using the two position division methods listed above.
A first location division method determines whether a base station node is at an edge of an SFN area.
In this case, the upstream node of the base station node may notify the corresponding base station node that is located at the edge of the SFN area by using a method of sending a signaling including an edge cell identifier to the base station node located at the edge of the SFN, or adding the edge cell identifier to the resource allocation information sent to the base station node located at the edge of the SFN. Thus, in step 303, each base station node may determine its own transmit power according to whether the edge cell identifier is received. At this time, the base station node may have a plurality of implementation methods for determining its own transmission power according to whether there is an edge cell identifier, for example:
the corresponding configuration can be performed on each base station node through the operation maintenance configuration, such as configuration: the transmission power needed to be used when the base station node receives the edge cell identifier and the transmission power needed to be used when the base station node does not receive the edge cell identifier;
or, after determining that a certain base station node is at the SFN edge, the upstream node of the base station node may add, in the signaling or the resource allocation information, the edge cell identifier and the transmit power or the power factor that the base station node needs to use. In this case, after the base station node receives the transmission power or the power factor, the transmission power needed to be used by the base station node can be determined; and when the transmitting power or the power factor is not received, the transmitting power normally used in the prior art, such as the default maximum power, is used for transmitting the service data. In this case, the signaling or the edge cell identifier added in the resource allocation information may be omitted and the transmission power may be directly added.
In the above description, only the implementation methods that may be used in each case are listed, and in practical applications, many other implementation methods may be available, and may be determined according to actual needs, which are not described herein again.
In addition, there may be various specific division methods for the edge and the center of the SFN area, for example: dividing according to the geographic position of the cell in the SFN area, for example, defining that the cell positioned at the outermost layer of the SFN area is positioned at the edge of the SFN, and the cells in other SFN areas are positioned at the center of the SFN area; or, the interference level of the cells in the SFN area to the cells in the peripheral area of the periphery of the SFN area may be divided according to the interference level of the cells in the SFN area, for example, when the cells in the SFN area all use the maximum transmission power for transmission, the cell whose interference level to the cells in the peripheral area of the periphery of the SFN area is smaller than a certain set value is the cell located in the center of the SFN area, and the cell greater than the set value is the cell located at the edge of the SFN area, where a specific value of the set value may be adjusted according to different actual application environments, and is not limited herein.
The second location division method determines whether a base station node is located in the center, middle, or edge of an SFN area.
In this case, similar to the implementation method mentioned in the first location division method, for example, a signaling including location information of the base station node in the center, middle or edge is sent to the corresponding base station node, or the location information is directly added to the corresponding resource allocation information, and each base station node configures transmission power or power factor corresponding to various location information through operation and maintenance.
Or, directly adding the transmitting power or power factor corresponding to the corresponding base station node into the signaling or resource allocation information; or directly replacing the position information with the corresponding transmitting power or power factor and the like corresponding to the corresponding base station node.
For the case of using power factors, for example, the power factors of the base station nodes located at the center, middle, and edge of the SFN area may be set as w1, w2, and w3, respectively, and then, regardless of whether the upstream node of the base station node sends the power factor or directly configures the power factor corresponding to the location information to the base station node, the transmission power required by each base station node may be finally determined, specifically:
the transmission power of the base station node in the center of the SFN is as follows: p1 ═ P × w 1;
the transmission power of the base station nodes located in the middle of the SFN is: p2 ═ P × w 2;
the transmission power of the base station nodes located at the edge of the SFN is: p3 ═ P × w 3;
where P is the maximum transmit power or a fixed power allocated to each base station node, w1, w2, and w3 are power factors, and generally, 0 < w3 < w2 < w1 < ═ 1.
In addition, similar to the specific division method of the edge and the center of the SFN area described in the first location division method, there may be a plurality of specific division methods of the edge, the middle and the center of the SFN area, for example: dividing according to the geographic position of the cell in the SFN area; or, the division is performed according to the interference degree of the cells in the SFN area to the cells in the peripheral area of the periphery of the SFN area, for example, when the cells in the SFN area are all transmitted with the maximum transmission power, the cells having the interference degree smaller than the set value 1 to the cells in the peripheral area of the periphery of the SFN area are all the cells located in the center of the SFN area, the cell having the interference degree between the set value 1 and the set value 2 is the cell located in the middle of the SFN area, the cell having the interference degree larger than the set value 2 is the cell located at the edge of the SFN area, where the set value 1 is smaller than the set value 2, and the specific values of the set value 1 and the set value 2 may also be adjusted correspondingly according to different actual application environments.
Step 303: each base station node configures a broadcast service channel according to the resource allocation information sent by the upstream node of the base station node and determines the transmission power required to be used by the base station node.
How to configure the broadcast service channel specifically by the base station node belongs to the known technology, and details are not described here.
In addition, how each base station node determines the transmit power to be used by itself is described in more detail in step 302:
for the first location partition method, when the base station node does not receive the signaling or the received resource allocation information does not include the edge cell identifier, the processing may be performed according to the prior art, such as using the maximum transmission power or the specified fixed transmission power; and when the base station node receives the signaling or the received resource allocation information includes the edge cell identifier, the base station node may transmit the broadcast service by using a smaller transmission power than the maximum transmission power or the fixed transmission power. The transmission power or the power factor corresponding to the transmission power may be carried in the signaling or the resource allocation information, or may be configured to each base station node. For the second location division method, similar to the processing method for the first location division method, the description is omitted here.
Step 304: each base station node uses the corresponding transmitting power to synchronously transmit the MBMS service data on the broadcast service channel.
In this step, when the base station node at the edge of the SFN performs the synchronous transmission of the broadcast service by reducing the transmission power, although the interference to the cell in the protection area of the SFN area is reduced, the reception quality of the user at the edge of the SFN area will be reduced, and in order to compensate for these losses, some compensation may be performed on the dedicated carrier or the mixed carrier. As shown in fig. 4, when the SFN is used on the dedicated carrier, the compensation packet can be transmitted on the hybrid carrier with lower power, and the SFN is not used on the hybrid carrier at this time. Of course, in the case of using SFN on the mixed carrier, the mixed carrier may be compensated on the dedicated carrier with lower power, and the SFN is not used on the dedicated carrier as well, as shown in fig. 5.
The following discusses how to implement the above-described reduction of SFN interference by combining dedicated carriers and mixed carriers in two cases.
(1) Case where a hybrid carrier is combined with a dedicated carrier having the same frame structure as that of the hybrid carrier:
the time slot structure of the mixed carrier and the time slot structure of the special carrier are completely the same, so if the time slot allocated to the MBMS service on the special carrier is also the downlink time slot of the mixed carrier, the data on the special carrier and the mixed carrier can be synchronized, and the data can be merged in the physical layer; the Medium Access Control (MAC) layer and the Radio Link Control (RLC) layer are required to be combined if the dedicated carrier and the hybrid carrier cannot be allocated to the same timeslot. Therefore, in this case, it is necessary to reserve the combination of both the physical layer and the MAC layer and the RLC layer.
(2) Case where a hybrid carrier is combined with a dedicated carrier different from its frame structure:
because the time slot structures are different, even if the mixed carrier and the special carrier are allocated to the same time slot, the combination of the physical layer under the condition can not be reserved, and the combination of the MAC layer and the RLC layer only needs to be reserved.
Specifically, how to implement the combination of the hybrid carrier and the dedicated carrier belongs to the known technology, and is not described herein again.
Fig. 6A and fig. 6B are both apparatuses for implementing MBMS service data transmission, and the apparatuses may be applied to an upstream node of a base station node according to the present invention, and the apparatuses include: a region determination module 610, a location determination module 620, a resource allocation module 630, and a data transmission module 640, wherein,
the area determining module 610 is configured to determine an SFN area, and send the SFN area information to the location determining module 620 and the resource allocating module 630.
A location determining module 620, configured to determine location information of each base station node in the SFN area within the SFN area. When the upstream node of the base station node determines the transmission power or power factor of each base station node in the SFN area, the position determining module 620 is further configured to determine the corresponding transmission power or power factor of each base station node according to the position information, and send the determination result to the resource allocating module 630, such as the inter-module information interaction relationship shown in fig. 6A. When the upstream node of the base station node determines only the position of each base station node, the determination result sent by the position determining module 620 only includes position information, and when the upstream node of the base station node determines the corresponding transmission power or power factor of each base station node, the determination result sent may include the position information or may not include the position information, in addition to the transmission power or power factor.
Alternatively, the location determining module 620 may also generate a location information signaling according to the location information, and/or the transmission power or the power factor, and send the location information signaling to the data sending module 640, and send the location information signaling to each corresponding base station node, such as the information interaction relationship between the modules shown in fig. 6B. When the upstream node of the base station node determines the corresponding transmission power or power factor of each base station node, the location information signaling may include the location information or may not include the location information, except for the transmission power or power factor.
The resource allocation module 630 is configured to allocate resources to the base station nodes in the SFN area in a unified manner, and generate resource allocation information according to the received location information, or the received transmission power, or the received power factor, and the resource allocation result, and send the resource allocation information to the data sending module 640.
A data sending module 640, configured to send the received resource allocation information to a corresponding base station node; and is further configured to send the signaling to the corresponding base station node when receiving the location information signaling.
Fig. 7 is a schematic structural diagram of a base station node for implementing MBMS service data transmission, where the base station node includes: a data reception module 710, a channel configuration module 720, a power determination module 730, and a data transmission module 740, wherein,
a data receiving module 710, configured to receive resource allocation information or location information signaling sent by an upstream node of the base station node.
A channel configuring module 720, configured to configure a broadcast service channel, and send the configuration result to the data sending module 740.
The power determining module 730 is configured to determine the transmission power required to be used by the base station node to which the node belongs, and send the transmission power to the data sending module 740.
A data sending module 740, configured to transmit MBMS service data according to the received configuration result and the transmission power.
The information interaction among the data receiving module 710, the channel configuring module 720 and the power determining module 730 included in the base station node is shown in fig. 7, but the information specifically interacted among the three modules may be two cases according to the difference of the data received by the data receiving module 710:
in the first case, when the data receiving module 710 receives resource allocation information sent by an upstream node of a base station node, and the resource allocation information includes a position relationship and/or a transmission power (or a power factor) corresponding to the base station node, the data receiving module 710 sends the received resource allocation information to the channel configuring module 720 and the power determining module 730, and correspondingly, the channel configuring module 720 and the power determining module 730 configure a channel or determine the transmission power according to corresponding information in the resource allocation information, respectively.
In the second case, the data receiving module 710 receives the resource allocation information sent by the upstream node of the base station node, and is further configured to receive a location information signaling sent by the upstream node of the base station node, where the resource allocation information does not include location information and/or transmission power (or power factor) corresponding to the base station node, and the location information and/or the transmission power (or power factor) is added to the location information signaling, at this time, the data receiving module 710 sends the received resource allocation information to the channel configuring module 720 for configuring a channel, and sends the received location information signaling to the power determining module 730 for determining the transmission power.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (14)
1. A method for mbms transmission, the method comprising:
A. determining a single frequency network SFN area and the position of each base station node in the SFN area by an upstream node of the base station node;
B. determining the transmitting power corresponding to the corresponding base station node according to the position information of the base station node;
C. and the base station node synchronously transmits the MBMS service data with corresponding transmission power.
2. The transmission method according to claim 1, wherein the base station node is: a base station NodeB, or an evolved base station e-NodeB;
correspondingly, the upstream node of the base station node is specifically:
when the base station node is a NodeB, an upstream node of the base station node is a core network or a radio network controller RNC;
and when the base station node is the e-NodeB, the upstream node of the base station node is an access gateway AGW.
3. The transmission method according to claim 1 or 2, wherein the determining the position of each base station node in the SFN area is specifically:
determining whether each base station node is located at the edge of the SFN area; or,
it is determined that each base station node is located in the center, middle, or edge of the SFN area.
4. The transmission method according to claim 1 or 2, wherein the determining of the transmission power of the base station node in step B is determined by an upstream node of the base station node;
correspondingly, step B further comprises:
an upstream node of a base station node performs uniform resource allocation on the base station node in the SFN area, and sends generated resource allocation information to the corresponding base station node, wherein the resource allocation information comprises: the resource allocation result, and the transmitting power or power factor and/or position information corresponding to the base station node corresponding to the resource allocation information; or,
an upstream node of the base station node generates a position information signaling according to the transmitting power or power factor and/or position information corresponding to the base station node and sends the position information signaling to the corresponding base station node; and the upstream node of the base station node performs uniform resource allocation to the base station nodes in the SFN area and sends the generated resource allocation information to the corresponding base station nodes.
5. The transmission method according to claim 4, wherein when the resource allocation information or the location information signaling includes a power factor, the determining of the transmission power in step B is: and the base station node calculates the corresponding transmitting power according to the power factor.
6. The transmission method according to claim 1 or 2, wherein the determining of the transmission power of the base station node in step B is determined by the base station node;
correspondingly, step a further comprises:
an upstream node of the base station node generates a position information signaling according to the position information corresponding to the base station node and sends the position information signaling to the corresponding base station node, and the upstream node of the base station node performs uniform resource allocation on the base station node in the SFN area and sends the generated resource allocation information to the corresponding base station node; or,
the upstream node of the base station node performs uniform resource allocation on the base station nodes in the SFN area and sends the generated resource allocation information to the corresponding base station nodes; wherein the resource allocation information includes: the resource allocation result and the corresponding position information of the base station node corresponding to the resource allocation information;
correspondingly, the step B specifically comprises the following steps: the base station node determines the corresponding transmitting power according to the position information signaling; or,
and the base station node determines the power factor corresponding to the base station node according to the position information signaling, and determines the transmitting power corresponding to the base station node according to the determined power factor.
7. The transmission method according to claim 1, wherein the synchronous transmission of a base station node is specifically: the synchronous transmission is performed using a method in which a dedicated carrier and a mixed carrier are combined.
8. The transmission method according to claim 7, wherein the dedicated carrier and the hybrid carrier are combined as follows: the dedicated carrier is compensated by the hybrid carrier or the hybrid carrier is compensated by the dedicated carrier.
9. The transmission method according to claim 7 or 8,
when the time slot structure of the mixed carrier and the time slot structure of the special carrier are completely the same, the combination of the special carrier and the mixed carrier reserves the combination of a physical layer and the combination of a media access control layer MAC and a radio link control layer RLC;
and when the time slot structure of the mixed carrier and the time slot structure of the special carrier are not identical, the combination of the special carrier and the mixed carrier only reserves the combination of the MAC layer and the RLC layer.
10. An apparatus for implementing mbms transmission, the apparatus comprising: a region determination module, a location determination module, a data transmission module, wherein,
the system comprises an area determining module, a position determining module and a service processing module, wherein the area determining module is used for determining an SFN area according to service characteristics and sending the determined SFN area information to the position determining module;
a location determining module, configured to determine location information of each base station node in the SFN area;
and, the location determination module is further to: determining corresponding transmitting power or power factor of the base station node according to the position information, generating a position information signaling according to the position information and/or the transmitting power or the power factor, and sending the position information signaling to a data sending module; correspondingly, the data sending module is configured to: sending the received position information signaling to a corresponding base station node;
alternatively, the location determination module is further configured to: generating a position information signaling according to the position information and sending the position information signaling to a data sending module; correspondingly, the data sending module is configured to: and sending the received position information signaling to a corresponding base station node.
11. The apparatus of claim 10, wherein the location determination module is further configured to: sending the position information to a resource allocation module;
the region determination module is further to: sending the SFN area information to a resource allocation module;
accordingly, the apparatus further comprises a resource allocation module, wherein,
the resource allocation module is used for uniformly allocating resources to the base station nodes in the SFN area, generating resource allocation information according to the received position information and the resource allocation result and sending the resource allocation information to the data sending module;
and the data sending module is used for sending the received resource allocation information to the corresponding base station node.
12. The apparatus of claim 10, wherein the location determination module is further configured to: sending the position information and/or the transmitting power or the power factor to a resource allocation module;
the region determination module is further to: sending the SFN area information to a resource allocation module;
correspondingly, the device further comprises a resource allocation module and a data transmission module, wherein,
the resource allocation module is used for uniformly allocating resources to the base station nodes in the SFN area, generating resource allocation information according to the received position information, and/or the received transmitting power or power factor and the resource allocation result, and sending the resource allocation information to the data sending module;
and the data sending module is used for sending the received resource allocation information to the corresponding base station node.
13. A base station node for implementing mbms transmission, the base station node comprising: a data receiving module, a channel configuration module, and a power determination module, wherein,
the data receiving module is used for receiving resource allocation information sent by an upstream node of the base station node and sending the resource allocation information to the channel configuration module;
a channel configuration module, configured to configure a broadcast service channel according to the resource allocation information;
the power determining module is used for determining the transmitting power of the base station node to which the power determining module belongs;
wherein the resource allocation information includes: the resource allocation result, and the position information and/or the transmitting power or the power factor corresponding to the base station node corresponding to the resource allocation information;
correspondingly, the data receiving module is further configured to: sending the received resource allocation information to a power determination module; the power determining module determines the transmitting power of the base station node to which the power determining module belongs according to the position information and/or the transmitting power or the power factor in the resource allocation information;
or, the data receiving module is further configured to: receiving a position information signaling sent by an upstream node of a base station node, and sending the signaling to a power determination module; correspondingly, the power determining module determines the transmitting power of the base station node to which the power determining module belongs according to the position information and/or the transmitting power or the power factor corresponding to the base station node contained in the signaling.
14. The base station node of claim 13, wherein the channel configuration module is further configured to: sending the configuration result to a data sending module;
the power determination module is further to: sending the determined transmitting power to a data sending module;
correspondingly, the base station node further comprises:
and the data sending module is used for transmitting the MBMS service data according to the received configuration result and the transmitting power.
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| CN1666454A (en) * | 2002-05-06 | 2005-09-07 | 高通股份有限公司 | Multi-media broadcast and multicast service (MBMS) in a wireless communication system |
| CN1867154A (en) * | 2005-05-17 | 2006-11-22 | 上海原动力通信科技有限公司 | Beam form-endowing and realizing method for co-frequency network |
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| CN1666454A (en) * | 2002-05-06 | 2005-09-07 | 高通股份有限公司 | Multi-media broadcast and multicast service (MBMS) in a wireless communication system |
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