CN107580301B - Method for realizing multimedia broadcast single frequency network MBSFN area reserved cell - Google Patents
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a method for realizing a reserved cell in an MBSFN (multimedia broadcast single frequency network) area, wherein in the reserved cell in the MBSFN area, an eNB does not send a system message SIB13, UE (user equipment) receiving or interested in receiving MBMS enters the reserved cell, no SIB13 message is found, the cell is not the cell of the MBSFN area, further, indication information is sent to an application layer through an access layer AS (access stratum) to indicate that the cell is the cell of the non-MBSFN area, users receiving the notification adopt some methods to realize service continuity, such AS PTP connection establishment and the like for receiving the MBMS, and the problems of large power consumption and large cell wireless resource waste of the UE in the reserved cell in MBMS transmission in the prior art are solved.
Description
Technical Field
The invention belongs to the technical field of mobile communication multimedia broadcasting, and particularly relates to a method for realizing a Multimedia Broadcast Single Frequency Network (MBSFN) area reserved cell.
Background
With the rapid development of the Internet and the popularization of large-screen multifunctional mobile terminals, a large number of mobile data multimedia services and various high-bandwidth multimedia services, such as video conferences, television broadcasts, video on demand, advertisements, online education, interactive games and the like, appear, so that on one hand, the requirement of multiple services of mobile users is met, and simultaneously, new service growth points are brought to mobile operators. These mobile data multimedia services require that multiple users can receive the same data at the same time, and compared with general data services, the mobile data multimedia services have the characteristics of large data volume, long duration, time delay sensitivity and the like.
In order to effectively utilize mobile network resources, the third Generation Partnership Project (3 GPP) proposes a Multimedia Broadcast Multicast Service (MBMS), which is a technology for transmitting data from a data source to a plurality of target mobile terminals, and implements sharing of network (including core network and access network) resources and improves utilization of network resources (especially air interface resources). The MBMS service defined by 3GPP can not only implement plain text low-rate message multicast and broadcast, but also implement broadcast and multicast of high-speed multimedia service, and provide various rich video, audio, and multimedia services, which undoubtedly follows the development trend of future mobile data, and provides better service prospects for the development of 3G.
The MBMS service is characterized by a large amount of data, a long duration of time for receiving the mobile terminal, and a constant average data rate. The above characteristics determine that the scheduling and Control signaling configuration of the MBMS service are semi-static, that is, the scheduling information and Control signaling information of the MBMS service are all kept unchanged for a long time, and these information are periodically transmitted through an MBMS Control Channel (MCCH), which is collectively referred to as MCCH information. An evolved MBMS (embms) system may have multiple MCCHs, each MCCH corresponding to a different MBSFN area, where control information of MBMS services transmitted by the corresponding MBSFN area is only carried. The configuration information of MCCH is indicated by system message SIB13 and the scheduling of SIB13 is indicated by SIB 1.
The 3GPP MBMS adopts an MCCH change notification message mechanism, that is, a specific MBMS Radio Network Temporary Identifier (M-RNTI) and Downlink Control Information (DCI) are used to indicate a change of an MCCH on a Physical Downlink Control Channel (PDCCH), where the change is only for a session start (session start) or a counting request (counting request) event, that is, only when a session start or counting request event occurs, a Network side may send an MCCH notification message; and the UE receiving or interested in receiving the MBMS monitors the MCCH notification message.
The UE with MBMS capability may be in a state of receiving or interested in receiving the MBMS service, where the interested in receiving the MBMS service refers to: and if the MBMS does not start MBSFN transmission, the UE prepares to receive the MBMS in an MBSFN mode, and monitors the MCCH notification message.
In a Long Term Evolution (LTE) system, MBMS technology is introduced in an LTE system of Release R9 (Release 9), and is enhanced in Release10 (R10, Release 10). In R9, the Control signaling of the MBMS service is transmitted separately from the User data, and is referred to as a Control Plane (CP) and a User Plane (UP). The control plane controls the transmission of user plane data by controlling the start, update and end of the service, and realizes the transmission of the basic MBMS service. The MBMS service is transmitted in an MBSFN (MBMS Single Frequency Network) area of a fixed size (which may be statically or semi-statically configured). In the R10 version, in order to improve the resource utilization rate of the MBMS system, the operator management is facilitated, and the MBMS technology is enhanced. The method mainly comprises the following steps: counting and priority-based preemption mechanisms.
A Service Area (MBMS Service Area) is defined in the MBMS system, and the concepts of MBSFN Area and MBSFN Area reserved cell are shown in fig. 2; the MBMS service area refers to: an area transmitting specific MBMS session (session) data; MBSFN areas refer to: the system comprises a plurality of cells, and an area for cooperatively completing MBSFN transmission; the MBSFN area reserved cell (hereinafter, referred to as a reserved cell) refers to: in the MBSFN area, the ue does not participate in MBSFN transmission, and may transmit other services with limited power on corresponding MBSFN subframe resources, and herein, other cells except the reserved cell in the MBSFN area are referred to as non-reserved cells. The MBMS service area is dynamically configured by BM-SC according to service requirement, the MBSFN area is configured statically or semi-statically by MCE, the reserved cell is configured by the MCE, and the MCCH configuration information including the reserved cell configuration information is sent to the eNB by the MCE through an M2setup response message. The M2setup procedure is initiated by the eNB, and in an MBSFN area, a cell is reserved to reduce interference with other MBSFN areas and Unicast (Unicast) traffic, and the reserved cell is generally set at the boundary of the MBSFN area as a guard band between one MBSFN area or between an MBSFN area and a non-MBSFN area. The reserved cell belongs to the MBSFN area but does not participate in MBSFN transmission, the corresponding resource can transmit other services or does not transmit the services, and if other services are transmitted, the transmission with lower power which does not affect the MBMS services is required.
During the research and practice of the prior art, the inventor finds that the prior art has the following problems: the reserved cell belongs to an MBSFN area, and the eNB needs to send a system message SIB13 to the reserved cell, for indicating MCCH and MCCH notification message (MCCH change notification) configuration information; however, the reserved cell does not participate in MBSFN transmission, the corresponding MBSFN resource may transmit other services, and the MCCH message and the MCCH notification message are both transmitted on the MBSFN subframe, so the reserved cell does not participate in MCCH transmission, and does not transmit the MCCH notification message, the meaning of the UE in the reserved cell receiving SIB13 is not great, and the radio resource of the reserved cell is wasted, which increases the power consumption of the UE in the reserved cell.
Disclosure of Invention
The invention aims to provide a method for realizing a cell reservation in a Multimedia Broadcast Single Frequency Network (MBSFN) area, which solves the problems of large power consumption of UE in a reserved cell and large waste of cell wireless resources in MBMS transmission in the prior art.
The invention adopts the technical scheme that in the MBSFN area reserved cell, an eNB does not send a system message SIB13, UE (user equipment) receiving or interested in receiving the MBMS enters the reserved cell, no SIB13 message is found, the cell is not the cell of the MBSFN area, further, an indication message is sent to an application layer through an access layer AS (access stratum) to indicate that the cell is the cell of the non-MBSFN area, and users receiving the notification adopt some methods to realize service continuity, such AS PTP connection establishment for receiving the MBMS.
The present invention is also characterized in that,
the method is implemented according to the following steps:
step 1, eNB in MBSFN area receives MCCH related BCCH Configuration Item information, eNB sends SIB13 message to non-reserved cell, and eNB does not send SIB13 message to reserved cell;
the MCCH related BCCH Configuration Item information is a message which is sent to an eNB in an MBSFN area by an MCE through an M2setup response message of an M2 interface;
step 2, UE receiving MBMS service enters a target cell;
step 3, UE judges whether the target cell belongs to the MBSFN area, if so, the step 4 is switched to, otherwise, the step 5 is switched to;
the UE determines that the target cell is a cell of another MBSFN area through the system message, specifically: the UE reads the SIB1 message of the target cell, if the SIB1 has the related scheduling information of SIB13, the target cell is the cell in the MBSFN area, otherwise, the target cell is not the cell in the MBSFN area;
further, the UE reads the MBSFN area ID in the SIB13 message, and determines whether the MBSFN area ID is the same as the MBSFN area ID of the source cell, if so, it indicates that the target cell and the source cell belong to the same MBSFN area, otherwise, it indicates that the target cell and the source cell belong to different MBSFN areas;
step 4, UE continues to receive the needed MBMS service in the target cell, and the process is ended;
the source cell and the target cell belong to the same MBSFN area, and the UE can continue to receive the required MBMS service in the target cell.
And step 5, the UE indicates the target cell is not the MBSFN area cell to the application layer through the AS, and the process is ended.
The eNB refers to an eNB which is located in an MBSFN area and has joined an IP multicast group, and a reserved cell is located below the eNB, and is configured by an MCE, which specifically includes: the MCE sends an M2setup response message to the enbs in the MBSFN area.
The M2setup response message content includes MCCH related BCCH Configuration Item information element.
The content of the MCCH related BCCH Configuration Item information element is the Configuration information related to MCCH in the SIB13 message, and after receiving the MCCH related BCCH Configuration Item information element, the eNB sends the SIB13 message to other cells except the reserved cell in the MBSFN area, i.e. does not send the SIB13 message in the reserved cell.
The SIB13 message is a dedicated system message for the MBMS service, and the UE receiving or interested in receiving the MBMS service determines which MBSFN area the cell belongs to through the SIB13 message, specifically: SIB13 message is scheduled through SIB1 message, UE can judge whether there is SIB13 message in the cell through SIB1 message; if the cell has the SIB13 message, the cell is the MBSFN area cell, otherwise the cell is the non-MBSFN area cell.
The UEs include RRC Idle mode UEs and RRC Connected mode UEs.
The MBSFN area reserved cell comprises: a reserved cell receiving unit, a selecting unit, a judging unit, a notifying unit:
the reserved cell receiving unit is used for the eNB to receive configuration information related to the reserved cell;
the selection unit is used for selecting whether to transmit a system message SIB13 according to the received configuration information, if the cell is a reserved cell, the eNB does not transmit SIB13, otherwise, the SIB13 is transmitted;
the judging unit is used for judging whether the target cell is the cell of the MBSFN area or not by the UE according to the system message, and specifically comprises the following steps: if the target cell has SIB13 message, it is indicated as MBSFN area cell, otherwise it is non-MBSFN area cell;
the notification unit is used for the UE to notify the application layer through the AS layer: the UE enters a non-MBSFN area.
The user equipment includes: a user equipment receiving unit, a judging unit, a notifying unit:
the user equipment receiving unit is used for the UE to receive the system message of the target cell, wherein the system message can be forwarded through the source cell or the UE enters the target cell to be received;
the judging unit is used for judging whether the target cell is the cell of the MBSFN area according to the system message, and specifically comprises the following steps: if the target cell has SIB13 message, it is indicated as MBSFN area cell, otherwise it is non-MBSFN area cell;
the notification unit is used for the UE to notify the application layer through the AS layer: the UE enters a non-MBSFN area.
The invention has the advantages that the invention can save the wireless resources of the reserved cell in the MBSFN area, reduce the power consumption of the UE in the reserved cell and improve the MBMS experience of the user.
Drawings
FIG. 1 is a flowchart illustrating a method for implementing a cell reservation in an MBSFN area of the present invention;
FIG. 2 is a schematic diagram of a structure of a system for reserving a cell in an MBMS-based multimedia broadcast single frequency network MBSFN area;
fig. 3 is a schematic diagram of a structure of a ue implementing a method for reserving a cell in an MBSFN area of a multimedia broadcast single frequency network according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention relates to a method for realizing a reserved cell in an MBSFN (multimedia broadcast single frequency network) area, AS shown in figure 1, in the reserved cell in the MBSFN area, an eNB does not send a system message SIB13, UE (user equipment) receiving or interested in receiving MBMS (multimedia broadcast multicast service) enters the reserved cell, no SIB13 message is found, the cell is not the cell in the MBSFN area, further, indication information is sent to an application layer through an access layer AS (application layer) to indicate that the cell is the cell in the non-MBSFN area, and a user receiving the notification adopts some methods to realize service continuity, such AS PTP connection establishment for receiving the MBMS.
The method is implemented according to the following steps:
step 1, eNB in MBSFN area receives MCCH related BCCH Configuration Item information, eNB sends SIB13 message to non-reserved cell, and eNB does not send SIB13 message to reserved cell;
the MCCH related BCCH Configuration Item information is a message which is sent to an eNB in an MBSFN area by an MCE through an M2setup response message of an M2 interface;
the eNB refers to an eNB which is located in an MBSFN area and has joined an IP multicast group, and a reserved cell is located below the eNB, and is configured by an MCE, which specifically includes: the MCE sends an M2setup response message to the eNB in the MBSFN area;
the M2setup response message content includes MCCH related BCCH Configuration Item information element;
the content of MCCH related BCCH Configuration Item information element is the Configuration information related to MCCH in SIB13 message, after receiving the MCCH related BCCH Configuration Item information element, eNB sends SIB13 message to other cells except the reserved cell in the MBSFN area, namely SIB13 message is not sent in the reserved cell;
the SIB13 message is a dedicated system message for the MBMS service, and the UE receiving or interested in receiving the MBMS service determines which MBSFN area the cell belongs to through the SIB13 message, specifically: SIB13 message is scheduled through SIB1 message, UE can judge whether there is SIB13 message in the cell through SIB1 message; if the cell has SIB13 message, it indicates that the cell is the cell of MBSFN area, otherwise, the cell is the cell of non MBSFN area;
step 2, UE receiving MBMS service enters a target cell;
step 3, UE judges whether the target cell belongs to the MBSFN area, if so, the step 4 is switched to, otherwise, the step 5 is switched to;
the UE determines that the target cell is a cell of another MBSFN area through the system message, specifically: the UE reads the SIB1 message of the target cell, if the SIB1 has the related scheduling information of SIB13, the target cell is the cell in the MBSFN area, otherwise, the target cell is not the cell in the MBSFN area;
further, the UE reads the MBSFN area ID in the SIB13 message, and determines whether the MBSFN area ID is the same as the MBSFN area ID of the source cell, if so, it indicates that the target cell and the source cell belong to the same MBSFN area, otherwise, it indicates that the target cell and the source cell belong to different MBSFN areas;
step 4, UE continues to receive the needed MBMS service in the target cell, and the process is ended;
the source cell and the target cell belong to the same MBSFN area, and the UE can continue to receive the required MBMS in the target cell;
step 5, UE indicates the target cell is not the cell of the MBSFN area to the application layer through AS, and the process is finished;
the UEs include RRC Idle mode UEs and RRC Connected mode UEs.
The purpose of this step is to improve the MBMS service experience of the user, if the user knows that the target cell is not the cell of the MBSFN area, the user can adopt some methods to realize the MBMS service continuity, for example, the user initiates a service request, and requests the network side to send the MBMS service in other manners, for example, PTP manner.
Although the reserved cell does not participate in MBSFN transmission, the MBMS can be transmitted by adopting a PTP mode.
The invention can save the wireless resources of the MBSFN area reserved cell, reduce the power consumption of the UE in the reserved cell and improve the MBMS experience of the user.
The MBSFN area reserved cell in the present invention, as shown in fig. 2, includes: reserved cell receiving section 01, selecting section 02, determining section 03, notifying section 04:
the reserved cell receiving unit 01 is used for the eNB to receive the configuration information related to the reserved cell;
the selecting unit 02 is used for selecting whether to transmit the system message SIB13 according to the received configuration information, if the cell is reserved, the eNB does not transmit SIB13, otherwise, the SIB13 is transmitted;
the determining unit 03 is configured to determine, by the UE, whether the target cell is a cell of the MBSFN area according to the system message, and specifically includes: if the target cell has SIB13 message, it is indicated as MBSFN area cell, otherwise it is non-MBSFN area cell;
the notification unit 04 is used for the UE to notify the application layer through the AS layer: the UE enters a non-MBSFN area.
As shown in fig. 3, the user equipment in the present invention includes: user equipment receiving unit 05, judging unit 06, notifying unit 07:
the UE receiving unit 05 is configured to receive a system message of a target cell by the UE, where the system message may be forwarded by a source cell or received by the UE entering the target cell;
the judging unit 06 is configured to judge whether the target cell is a cell of the MBSFN area according to the system message, and specifically includes: if the target cell has SIB13 message, it is indicated as MBSFN area cell, otherwise it is non-MBSFN area cell;
the notification unit 07 is used for the UE to notify the application layer through the AS layer: the UE enters a non-MBSFN area.
The technical key points and the protection points of the invention are as follows:
1. the eNB does not send a system message SIB13 in the MBSFN reserved cell;
2. the UE does not monitor the MCCH notification message in a non-MBSFN area cell (including a reserved cell);
3. if the target cell is a non-MBSFN area cell, the UE entering the target cell from the MBSFN area cell informs an application layer through an access layer: the UE enters a non-MBSFN area cell.
It should be understood by those skilled in the art that the system and the user equipment implementing the MBMS reserving cell of the present invention are designed to implement the foregoing method for implementing the MBMS reserving cell, and the implementation functions of the processing units described above can be understood by referring to the relevant description of the foregoing method. The functions of the processing units in the figures may be implemented by a program running on a processor, or may be implemented by specific logic circuits.
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 (3)
1. A method for realizing a Multimedia Broadcast Single Frequency Network (MBSFN) area reserved cell is characterized in that in the MBSFN area reserved cell, an eNB does not send a system message SIB13, UE receiving or interested in receiving MBMS enters the reserved cell, SIB13 messages are not found, the cell is not the MBSFN area cell, indication information is sent to an application layer through an access layer (AS), the cell is indicated to be a non-MBSFN area cell, a user receiving the indication information requests to establish PTP connection for receiving the MBMS so AS to realize service continuity;
the method is implemented according to the following steps:
step 1, eNB in MBSFN area receives MCCH related BCCH Configuration Item information, eNB sends SIB13 message to non-reserved cell, and eNB does not send SIB13 message to reserved cell;
the MCCH related BCCH Configuration Item information is a message sent by the MCE to the eNB in the MBSFN area through an M2setup response message of an M2 interface;
step 2, UE receiving MBMS service enters a target cell;
step 3, UE judges whether the target cell belongs to the MBSFN area, if so, the step 4 is switched to, otherwise, the step 5 is switched to;
the UE judges that the target cell is a cell of other MBSFN areas through the system message, and specifically comprises the following steps: the UE reads the SIB1 message of the target cell, if the SIB1 has the related scheduling information of SIB13, the target cell is the cell in the MBSFN area, otherwise, the target cell is not the cell in the MBSFN area;
further, the UE reads the MBSFN area ID in the SIB13 message, and determines whether the MBSFN area ID is the same as the MBSFN area ID of the source cell, if so, it indicates that the target cell and the source cell belong to the same MBSFN area, otherwise, it indicates that the target cell and the source cell belong to different MBSFN areas;
step 4, UE continues to receive the needed MBMS service or continues to monitor the MCCH notification message in the target cell, and the process is finished;
the source cell and the target cell belong to the same MBSFN area, and the UE can continue to receive the required MBMS in the target cell;
step 5, UE indicates the target cell is not the cell of the MBSFN area to the application layer through AS, and the process is finished;
the eNB refers to an eNB that is located in an MBSFN area and has joined an IP multicast group, and there is a reserved cell below the eNB, where the reserved cell is configured by an MCE, and the specific details are as follows: the method includes that an MCE sends an M2setup response message to an eNB in an MBSFN area, wherein the content of the M2setup response message includes MCCH related BCCH Configuration Item information elements, the content of the MCCH related BCCH Configuration Item information elements is MCCH related Configuration information in an SIB13 message, after the eNB receives the MCCH related BCCH Configuration Item information elements, the eNB sends an SIB13 message to other cells except a reserved cell in the MBSFN area, namely, does not send an SIB13 message in the reserved cell, the SIB13 message is a special system message of the MBMS, and a UE receiving or interested in receiving the MBMS judges which MBSFN area the cell belongs to through the SIB13 message, specifically: SIB13 message is scheduled through SIB1 message, UE can judge whether there is SIB13 message in the cell through SIB1 message; if there is SIB13 message in the cell, it indicates that the cell is a cell of an MBSFN area, otherwise, the cell is a non-MBSFN area cell, and the MBSFN area reserving the cell includes: a reserved cell receiving unit (01), a reserved cell selecting unit (02), a reserved cell determining unit (03), a reserved cell notifying unit (04): wherein the reserved cell receiving unit (01) is configured for the eNB to receive the reserved cell related configuration information; a reserved cell selection unit (02) is used for selecting whether to send a system message SIB13 according to the received configuration information, if the cell is reserved, the eNB does not send SIB13, otherwise, the SIB13 is sent; the reserved cell determining unit (03) is configured to determine, by the UE, whether the target cell is a cell of the MBSFN area according to the system message, and specifically includes: if the target cell has SIB13 message, it is indicated as MBSFN area cell, otherwise it is non-MBSFN area cell; the reserved cell notification unit (04) is used for the UE to notify the application layer through the AS layer: the UE enters a non-MBSFN area.
2. The method of claim 1, wherein the UEs comprise RRC Idle mode UEs and RRC Connected mode UEs.
3. A method for multimedia broadcast single frequency network, MBSFN, area reserved cell implementation according to claim 2, wherein said UE comprises: a user equipment receiving unit (05), a user equipment judging unit (06), a user equipment notifying unit (07):
the user equipment receiving unit (05) is used for the UE to receive the system message of the target cell, wherein the system message can be forwarded through the source cell or the UE enters the target cell to be received;
the user equipment judging unit (06) is configured to judge whether the target cell is a cell of the MBSFN area according to the system message, and specifically includes: if the target cell has SIB13 message, it is indicated as MBSFN area cell, otherwise it is non-MBSFN area cell;
the user equipment notification unit (07) is used for the UE to notify the application layer through the AS layer: the UE enters a non-MBSFN area.
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