WO2012113312A1 - Mbms业务发送方式切换的方法和*** - Google Patents
Mbms业务发送方式切换的方法和*** Download PDFInfo
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- WO2012113312A1 WO2012113312A1 PCT/CN2012/071305 CN2012071305W WO2012113312A1 WO 2012113312 A1 WO2012113312 A1 WO 2012113312A1 CN 2012071305 W CN2012071305 W CN 2012071305W WO 2012113312 A1 WO2012113312 A1 WO 2012113312A1
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- mbms
- mode
- ptm
- network side
- ptp
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/30—Resource management for broadcast services
Definitions
- the present invention relates to a Multimedia Broadcast Multicast Service (MBMS), and in particular to a method and system for switching an MBMS service transmission mode.
- MBMS Multimedia Broadcast Multicast Service
- the sharing of resources improves the utilization of network resources (especially air interface resources).
- the MBMS service defined by 3GPP can not only realize plain text low-rate message class multicast and broadcast, but also realize high-speed multimedia service broadcast and multicast, and provide a variety of rich video, audio and multimedia services, which undoubtedly conforms to future mobile
- 3G 3rd Generation, third generation digital communication
- the telecom operator ORANGE SA proposes that the MBMS service can be used as a user equipment (Point to Point, PTP) on the network side according to the needs of the operator.
- PTP Point to Point
- UE User Equipment
- the MBMS service can be converted into a multimedia broadcast multicast single frequency network (Multimedia Broadcast multicast) Service Single Frequency Network, MBSFN) (a kind of point-to-multipoint (oint to multipoint, PTM) mode, and is a multi-cell joint transmission method.
- MBSFN Multimedia Broadcast multicast
- PTM point-to-multipoint
- MBSFN multimedia broadcast multicast single frequency network
- MBMS service transmitted in a certain MBSFN area below The description is described in the PTM mode.
- the PTP mode is changed to the PTM mode to further improve the spectrum efficiency of transmitting the MBMS service and save spectrum resources.
- the foregoing Counting is a method initiated by the network side to count the number of UEs being received or interested in receiving for one or more MBMS services.
- the specific process is that the network sends the identifier of the MBMS service that needs to be counted to the UE, and then the UE determines whether it is receiving or interested in receiving the MBMS service. If the UE is receiving or interested in receiving, the UE sends the receiving to the network side. information. Through this process, the network side can grasp which MBMS services are being sent, the number of users received, etc., and also know whether some MBMSs that are about to start are popular, and whether users are willing to receive them.
- the invention discloses a method and a system for switching an MBMS service transmission mode, so as to solve the problem that the PTP mode has not been switched to the PTM mode.
- the present invention provides a method for switching an MBMS transmission mode, including:
- the network side performs multimedia handover multicast service (MBMS) handover to point-to-multipoint (PTM) mode handover preparation;
- MBMS multimedia handover multicast service
- PTM point-to-multipoint
- the user equipment (UE) that is receiving the MBMS in a point-to-point (PTP) manner sends a notification message to notify the MBMS that the MBMS is about to be switched to be sent in a PTM manner; the UE performs the notification message according to the notification message.
- the notification message carries at least one of the following information: a start time of the MBMS, a message of a multimedia broadcast multicast single frequency network (MBSFN) area, and a temporary shift in a PTM manner.
- MMSFN multimedia broadcast multicast single frequency network
- the step of the UE performing the handover preparation to the PTM mode includes: determining, by the UE, the MBSFN area according to the notification message, receiving the multicast control channel information corresponding to the MBSFN area, and discovering from the received multicast control channel information.
- the step of the network side switching to the PTM mode includes: the network side starts to use the PTM mode to send the MBMS, and stops sending the MBMS in a PTP manner; the step of the UE switching to the PTM mode includes: the UE Start receiving the MBMS in the PTM mode, and stop receiving the MBMS in the PTP mode.
- the network side sends the notification message by using an acknowledgment mechanism.
- the method further includes: if the UE fails to correctly receive the notification message, the network side resends the notification message.
- the triggering conditions for the network side to perform the handover preparation of the MBMS to the PTM mode include: manual triggering; system setting; or, when the network side performs the PTP mode transmission of the MBMS, the UE that is receiving the MBMS in the PTP manner is counted. The number and/or number of UEs interested in receiving the MBMS in PTM mode reaches a preset threshold.
- the notification message includes a start time for transmitting the MBMS in a PTM manner, and the network side and the UE switch to the PTM mode when the start time arrives.
- the step of the network side transmitting the notification message to the UE that is receiving the MBMS in the PTP mode includes: after the network side determines that the handover preparation is completed or determines that the condition for completing the handover preparation is completed, the UE is receiving the MBMS in the PTP manner. Send a notification message.
- the present invention also provides an MBMS transmission mode switching system, including:
- a handover preparation module on the network side, configured to perform a handover preparation of a multimedia broadcast multicast service (MBMS) to a point-to-multipoint (PTM) mode;
- MBMS multimedia broadcast multicast service
- PTM point-to-multipoint
- the network side handover notification module is configured to send a notification message to a user equipment (UE) that is receiving the MBMS in a point-to-point (PTP) manner to notify the MBMS that the MBMS is about to be cut Change to PTM mode to send;
- UE user equipment
- PTP point-to-point
- a handover preparation module of the UE configured to perform handover preparation to switch to a PTM mode according to the notification message
- the switching module of the network side and the UE is configured to switch the network side and the UE to the PTM mode respectively after completing the handover preparation.
- the network side further includes a statistic module, where the statistic module is configured to: when the network side uses the PTP mode to send the MBMS, the number of UEs that are receiving the MBMS by using the PTP mode, and/or the interest to receive the MBMS in the PTM manner.
- the number of UEs in the network side is also set to trigger the handover preparation to switch to the PTM mode under the following trigger conditions: manually triggering, the system setting or the number of UEs counted by the statistics module reaches a preset threshold value.
- the notification message carries at least one of the following information: a start time of the MBMS, a multimedia broadcast multicast single frequency network (MBSFN) area information or a temporary mobile group identifier (TMGI), and an identifier to be switched to a PTM mode in a PTM manner.
- the handover preparation module of the UE is configured to perform handover to switch to the PTM mode by: receiving control information related to the MBMS and discovering an identifier of the MBMS.
- the handover notification module on the network side is configured to send the notification message by using an acknowledgement mechanism, and is further configured to resend the notification message when the UE fails to correctly receive the notification message.
- the handover notification module on the network side is configured to send a notification message to the UE that is receiving the MBMS in the PTP manner after determining that the handover preparation is completed or determining that the handover preparation condition is completed.
- the switching module on the network side is configured to switch the network side to the PTM mode by: causing the network side to start sending the MBMS by using the PTM mode when the start time is reached, and stopping sending the MBMS in the PTP manner;
- the handover module of the UE is configured to switch the UE to the PTM mode by: causing the UE to start receiving the MBMS in the PTM mode when the start time arrives, and stop receiving the MBMS in the PTP mode.
- the method and system for switching the MBMS service transmission mode of the present invention when the network side determines that the handover preparation is completed or determines that the handover preparation condition is completed, sends a notification message to the UE that is receiving the MBMS service in the PTP manner to notify the MBMS service that the MBMS service is about to be sent.
- the handover is switched to the PTM mode, so that the UE that receives the notification message starts to prepare for handover and smoothly switches from the PTP mode to the PTM mode.
- FIG. 1 is a schematic flowchart of Embodiment 1 of a method for switching an MBMS service transmission mode according to the present invention
- FIG. 2 is a schematic flowchart of a second embodiment of a method for switching an MBMS service transmission mode according to the present invention
- FIG. 4 is a schematic diagram of a network side using a confirmation mechanism to send a notification message in a method for switching an MBMS service transmission mode according to the present invention
- FIG. 5 is a block diagram showing the structure of an embodiment of a MBMS service transmission mode switching system according to the present invention.
- FIG. 6 is a block diagram showing another embodiment of the MBMS service transmission mode switching system of the present invention.
- the main idea of the MBMS service transmission mode switching method and system of the present invention is to send a notification message to the UE that is receiving the MBMS service in the PTP manner to notify the network when the network side determines that the handover preparation is completed or determines that the handover preparation condition is completed.
- the MBMS service is about to be switched to the PTM mode, so that the UE that receives the notification message starts to prepare for handover and smoothly switches from the PTP mode to the PTM mode.
- the handover preparation in the present invention refers to preparation for pre-switching, including resource allocation, bearer establishment, and control information, in order to implement the final handover of the PTP mode to the PTM mode by the network side or the UE. Wait. Specifically, before the PTP mode is switched to the PTM mode, the network side handover preparation is performed by the network side for the bearer establishment of the MBMS service that needs to be converted into the PTM mode, which mainly includes configuring the physical resources of the PTM mode for the MBMS, and The scheduling priority level of the MBMS service is judged whether it can be scheduled, the corresponding control information is configured for the MBMS, and the time for scheduling transmission and the like is determined.
- the preparation of the UE to be switched from the PTP mode to the PTM mode to receive the MBMS service is prepared for the UE to receive the MBMS service in the PTM mode according to the information sent by the network side, which mainly includes establishing a bearer, and further receiving according to the information sent by the network side.
- Relevant control information and from which the MBMS service eg, TMGI of the service
- the relevant control information is Multicast Control Channel (MCCH) information of the MBSFN area corresponding to the PTM mode of the MBMS service.
- MCCH Multicast Control Channel
- Some cells in a certain MBSFN area which are located in some fixed-location cells, are providing some MBMS services for some UEs in PTP mode.
- the MBMS services are not sent in PTM mode, but the MBMS services are pre-arranged. , at the point in time when the PTM will be sent.
- the network side triggers the handover preparation to switch to the PTM mode according to the counting result, and further determines that the handover preparation is completed, and sends a notification message to the UE that is receiving the MBMS service in the PTP manner.
- the embodiment of the MBMS service transmission mode switching method includes the following steps:
- Step 101 The counting result reaches the preset threshold, and the network side performs the switching preparation of the MBMS service switching to the PTM mode.
- the network side counts the MBMS services sent in the PTP manner to learn whether the MBMS service needs to be sent in the PTM mode.
- the spectrum efficiency of the two transmission modes is different in different scenarios. Generally, when a certain number of UEs receive a certain MBMS service in a certain area, the number of UEs exceeds a certain threshold (usually the MBSFN area). If the average cell per cell exceeds one UE and receives the MBMS in PTP mode, it needs to use the PTM mode. Then, it should be switched to the PTM mode for transmission, which will improve the spectrum efficiency.
- the network side obtains, according to the foregoing, the receiving situation of the MBMS service on the UE side, including the number of UEs that are receiving through the PTP mode and are interested in receiving the MBMS service by using the PTP mode, or the UE that is interested in receiving the MBMS service by using the PTM mode.
- the number determines whether to change the way the MBMS service is sent.
- the threshold of the number of UEs is preset, that is, when the number of UEs receiving the MBMS service reaches or exceeds the threshold, the handover of the PTP transmission mode to the MBSFN transmission mode is triggered, and vice versa. Threshold values can be obtained by simulation.
- the method used here is the existing counting process.
- the network side can learn the reception status of one or more MBMS services on the UE side through the counting process. That is, for a MBMS service being transmitted, it is known (probably) how many UEs are receiving, and it is also possible to implement an MBMS service to be transmitted, and know how many UEs will wait for reception.
- the MBMS service is counted (according to the existing counting mechanism of the LTE), and the number of UEs that are receiving the MBMS service in the PTP manner and the number of UEs that are interested in receiving the MBMS service are calculated, and the PTP mode is received after calculation.
- the number of UEs and the number of UEs that are interested in receiving are large. Therefore, the MBMS service can obtain higher efficiency by using the PTM method in the MBSFN area, so it is ready to convert the transmission mode of the MBMS service.
- the network side knows that the MBMS service sent by the PTP mode needs to be switched to the PTM mode for transmission. Then, the network side first performs handover preparation to switch to the PTM mode, including configuring resources corresponding to the PTM mode, scheduling priorities, determining the scheduled transmission time, and the like, and establishing a connection, such as establishing a PTM transmission connection, including the core.
- the network side needs to determine an MBSFN area for the MBMS service, or may be in the original MBSFN area, and then may send a new service in the MBSFN area according to the existing technology (refer to the related protocols of 36.300, 36.331, and 36.443). Come and implement it.
- the network side can determine which MBMS service transmission mode is to be converted by using the Temporary Mobile Group Identity (TMGI) corresponding to the MBMS service in the PTP mode.
- TMGI Temporary Mobile Group Identity
- Step 102 The network side determines that the handover preparation is completed, and receives the foregoing MBMS in PTP mode.
- the UE of the service sends a notification message to notify that the MBMS service is about to be switched to be sent in PTM mode;
- the UE After the network side determines that the handover preparation for switching to the PTM mode is completed, the UE sends a notification message to the UE that is receiving the MBMS service in the PTP manner.
- the function of the notification message is mainly used to notify the UE network side to switch the MBMS service sent by the PTP mode to the PTM mode, and the notification purpose can be implemented in an implicit or explicit manner.
- An explicit method such as a specific message type, or carrying the corresponding notification information in the message, or carrying the information of the MBMS service that needs to be switched to the PTM mode, such as the MBMS service ID, or the TMGI corresponding to the MBMS service, etc.
- it can indicate which PTP mode MBMS service needs to be switched to PTM mode information.
- the implicit manner is implemented by the message carrying other information that enables the UE to know the purpose of the notification (such as the start time of sending the MBMS service by the PTM method mentioned below, etc.).
- the notification message needs to carry the service identification information of the MBMS service, and the network side may not carry the service identification information of the corresponding MBMS service in the notification message sent to the UE.
- the UE confirms that the MBMS service being received is about to be switched to the PTM mode.
- Step 103 The UE performs handover preparation to switch to the PTM mode according to the notification message.
- the UE performs handover to the PTM receiving mode according to the notification message received from the network side, including connection establishment and the like.
- the network side needs to reserve a certain time for the UE to ensure that the UE can complete the connection establishment of the new receiving mode within the reserved time.
- Step 104 After completing the handover preparation, the network side and the UE switch to the PTM mode.
- the UE After receiving the message sent by the network side to notify that the MBMS service sent by the PTP mode is about to change, the UE directly starts to establish a PTM mode to receive the connection according to the message, and directly starts to use the PTM mode to try to receive the MBMS. Service, until the MBMS service in the PTM mode is discovered and received. Then release the original PTP connection.
- the network side may also stop sending the MBMS service in the PTP mode for the UE after a period of time, releasing the original PTP mode resources.
- the period of time here can be preset to a period of time after the start of transmission, for example, after 5 seconds.
- the network side handover to the ⁇ mode includes starting to send the MBMS service, stopping the ⁇ mode to send the MBMS service, releasing the PTP mode bearer, and releasing the PTP mode resource, etc.; the UE switching to the PTM mode includes: The PTM mode is used to receive the MBMS service, the PTP mode is used to receive the MBMS service, the PTP mode bearer is released, and the PTP mode resources are released.
- the above process ensures the continuity of the MBMS service when the PTP transmission mode is converted into the PTM transmission mode.
- the method is very simple, and the interaction process between the network side and the UE is reduced, and the process is simplified.
- Some cells in a certain MBSFN area which are composed of some fixed cells, are providing some MBMS services for some UEs in the PTP mode.
- the MBMS services are not sent in the PTM mode.
- the MBMS services are in the PTP mode.
- the sent, not scheduled to be sent by PTM, or the pre-arranged PTM time is still early.
- the network side directly switches to the PTM mode handover preparation according to the operator's request, and further determines that the UE is receiving the notification request, and transmits a notification message to the UE that is receiving the MBMS service in the PTP manner.
- the embodiment includes the following steps:
- Step 201 The counting result reaches the preset threshold, and the network side performs the switching preparation of the MBMS service switching to the PTM mode;
- the operator performs statistics on the MBMS service.
- the existing counting mechanism is not used here, and other methods are used, because the PTP mode requires the UE to be in the RRC-Connected connection.
- the network side can check the MBMS service identifier that the UE is receiving for each connection state, so as to determine whether the UE receives a certain MBMS service, so that the network side can also know the reception status of the MBMS service in the PTP mode. .
- This method only counts the number of UEs that are receiving the MBMS service in the PTP mode. After calculation, the number of UEs received by the PTP mode is large, so the MBMS service is in the MBSFN. In the area, the PTM method can be used to obtain higher efficiency, so it is ready to convert the transmission mode of the MBMS service.
- the network side determines that the MBMS service sent by the PTP mode needs to be converted into a PTM mode for transmission. Then, the network side first performs the handover preparation to switch to the PTM mode, that is, configures the resources of the corresponding PTM mode, schedules priorities, determines the scheduled transmission time, and the like, and establishes a connection.
- Step 202 When the network side determines that the condition for completing the handover preparation is completed, the UE sends a notification message to the UE that is receiving the MBMS service in the PTP manner, to notify that the MBMS service is about to be switched to be sent in the PTM mode.
- the network side can pre-determine that the new transmission mode can be successfully established (for example, the resource for transmitting the service is sufficient, the priority of the sending service is sufficiently high, etc.), that is, when the condition for completing the handover preparation is already determined, the network side receives the PTP mode.
- the UE of the MBMS service sends a notification message, which is mainly for notifying the UEs.
- the original PTP transmission/reception mode of the MBMS service is about to stop, and the new PTM transmission/reception mode is further adopted.
- the notification message includes a start time of the MBMS service sent by the network side in the PTM mode.
- the network side sends the notification message to the UE. If the UE receives the message correctly, it needs to send the network side to confirm that the message has been correctly received. Because this message is in the PTP mode to PTM mode conversion process, the only message sent by the network side to the UE can be further ensured that the UE receives the continuity of the MBMS service only after the UE receives it correctly. Therefore, if the UE correctly receives the message, it needs to reply to the network side. If the UE does not receive the message correctly, the network side needs to adjust the message and then resend the message to the UE.
- Step 203 The UE performs handover preparation to switch to the PTM mode according to the notification message.
- the UE performs handover preparation to switch to the PTM reception mode according to the notification message received by the network, including receiving related control information (MCCH), and discovering the location.
- MCCH related control information
- Step 204 After completing the handover preparation, the network side and the UE switch to the PTM mode.
- the UE After the UE completes the handover preparation, according to the start time in the received notification message, the UE starts to receive the MBMS service in the PTM mode at the start time of the corresponding PTM mode, and the UE stops the original mode to receive the MBMS service, and the network side The original mode is stopped, the UE continues to send the MBMS service, and the original PTP resource is released. At this time, the UE and the network side no longer need to interact.
- the above process ensures the continuity of the MBMS service when the PTP transmission mode is converted into the PTM transmission mode.
- the method is very simple, and the interaction process between the network side and the UE is reduced, and the process is simplified.
- Some cells in a certain MBSFN area which are composed of some fixed cells, are providing a certain MBMS service for some UEs in the PTP mode, and the MBMS service is not transmitted in the PTM mode.
- the network side directly switches to the PTM mode switching preparation according to the operator's needs or system settings, and further determines that the UE is receiving the MBMS service in the PTP mode when the condition for completing the handover preparation is completed.
- the embodiment of the MBMS service delivery mode switching method includes the following steps:
- Step 301 The network side performs the handover preparation of the MBMS service switching to the PTM mode according to the operator's requirement or the system setting.
- the operator wants to change the sending mode of the MBMS service. For example, the operator considers that the resources in the area are not very tight, and wants to send the PTM mode to expand the coverage of the MBMS service transmission, or operate. In order to reach certain operational purposes, the quotient needs to use the PTM mode to transmit in the entire MBSFN area, and also considers that after the PTM mode is used, in order to save resources, the PTP mode is not further used for the UE to transmit. Said MBMS business. Then, the operator triggers the network side to perform handover preparation for switching to the PTM mode.
- the network side knows that the MBMS service sent by the PTP mode needs to be converted into a PTM mode for transmission. Then, the network side first prepares the PTM mode, that is, configures the resources of the corresponding PTM mode, schedules priorities, determines the scheduled transmission time, and the like, and establishes a connection. Step 302: When the network side determines that the condition for completing the handover preparation is met, the network side sends a notification message to the UE that is receiving the MBMS service in the PTP manner, to notify that the MBMS service is about to be switched to the PTM mode.
- the network side can pre-determine that the new transmission mode can be successfully established (for example, the resources for sending the service are sufficient, the priority of the sending service is sufficiently high, etc.), that is, when the condition for completing the handover preparation can be determined, the network side receives the PTP mode.
- the UE of the MBMS service sends a notification message, which is mainly for notifying the UEs.
- the original PTP transmission/reception mode of the MBMS service is about to stop, and the new PTM transmission/reception mode is further used.
- the notification message includes the start time of the MBMS service and the MBSFN area information (that is, the MBSFN area where the MBMS service is located in the new mode), and the network side uses the PTM method. TMGI information.
- This step requires the use of an acknowledgment mechanism.
- This message is the only message sent by the network to the UE during the PTP-to-PTM conversion process. Only after the UE receives it correctly can the UE further receive the MBMS. Business continuity. Therefore, if the UE correctly receives the message, it needs to reply to the network side. If the UE does not receive it correctly, the network side needs to adjust the message and then resend it to the UE.
- Step 303 The UE performs handover preparation to switch to the PTM mode according to the notification message.
- the UE performs establishment of a new PTM reception mode according to the notification message received by the network.
- Step 304 After completing the handover preparation, the network side and the UE switch to the PTM mode.
- the network side After the UE completes the handover preparation, the network side sends the MBMS service start time, the MBSFN area information (that is, the MBSFN area where the MBMS service is located in the new mode), and the used TMGI information according to the network side in the received notification message. Directly start receiving the service corresponding to the TMGI in the specified MBSN area at the start time of the corresponding PTM mode. After the start time point arrives, the UE autonomously stops the original PTP receiving mode and releases its original PTP. Way of resources. After the start time point arrives, the network side also releases the original PTP transmission mode, and releases the original PTP mode resources.
- the above process ensures the continuity of the MBMS service when the PTP transmission mode is converted into the PTM transmission mode.
- the method is very simple, and the interaction process between the network side and the UE is reduced, and the process is simplified.
- the network side is to know the actual situation and possible reception of the MBMS service by counting the UE that is receiving and/or interested in receiving the MBMS service. The situation, to trigger the switchover to switch to the ⁇ mode.
- the notification message in the second embodiment only carries the start time of the network side, and the UE needs to retrieve all the MBSFN areas of the current cell to find the original ⁇ mode.
- the MBMS service has increased the retrieval process of the UE.
- the notification message may carry any of the following information:
- the PTM mode sends the start time of the MBMS service, the MBSFN area information or the Temporary Mobile Group Identifier (TMGI), and of course, other modes that facilitate the UE to receive.
- TMGI Temporary Mobile Group Identifier
- Other information of the handover is not limited in the present invention.
- the specifically implemented network side network element may be a Multi-cell/Multicast Coordination Entity (MCE), a Broadcast-Multicast-Service Centre (BMSC), or an MBMS Gateway (MBMS).
- MCE Multi-cell/Multicast Coordination Entity
- BMSC Broadcast-Multicast-Service Centre
- MBMS MBMS Gateway
- MME Mobility Management Entity
- the present invention further provides an MBMS service transmission mode switching system.
- the system includes:
- a handover preparation module on the network side, configured to perform handover preparation for switching the MBMS service to the PTM mode;
- the network side switching notification module is configured to send a notification message to the UE that is receiving the MBMS service in a PTP manner, to notify that the MBMS service is about to be switched to a PTM mode transmission;
- a handover preparation module of the UE configured to perform handover preparation to switch to a PTM mode according to the notification message
- the switching module of the network side and the UE is configured to switch the network side and the UE to the PTM mode respectively after completing the handover preparation.
- the system is different from the system shown in FIG. 5, wherein the network side further includes a statistic module, where the statistic module is configured to perform statistics when the MBMS service is sent by using the PTP mode on the network side.
- the statistic module is configured to perform statistics when the MBMS service is sent by using the PTP mode on the network side.
- the handover preparation module on the network side triggers handover preparation for switching to the PTM mode.
- the triggering conditions for the handover preparation module of the network side to perform the handover preparation of the MBMS service to the PTM mode include: manual triggering or system setting.
- the notification message carries at least one of the following information:
- the information of the MBSFN area is information indicating which MBSFN area the MBMS service is transmitted in the PTM mode, for example, the MBSFN area ID.
- the TMGI here refers to the MBMS service being transmitted in the MBSFN area by the PTM method. The TMGI used.
- the handover preparation of the UE to switch to the PTM mode includes receiving control information related to the MBMS and discovering an identifier of the MBMS service.
- the handover notification module on the network side sends the notification message by using an acknowledgement mechanism, and when the UE fails to receive the UE correctly, the notification message is resent.
- the handover notification module on the network side determines that the handover preparation is completed or determines that the handover preparation condition is completed, and then sends a notification message to the UE that is receiving the MBMS service in the PTP manner.
- the switching module on the network side enables the network side to start transmitting the MBMS service by using the PTM mode when the start time arrives. And stopping to send the MBMS service in the PTP mode, the handover module of the UE enables the UE to start receiving the MBMS service in the PTM mode when the start time arrives, and stop receiving the MBMS service in the PTP mode.
- each module/unit in the foregoing embodiment may be implemented in the form of hardware, or may be implemented in the form of a software function module.
- the invention is not limited to any specific form of combination of hardware and software. It can be found that the network side and the UE only interact once in the whole process, which can reduce the interaction between a large number of UEs and the network side. Make the conversion process simple and easy to implement.
- the network side when the network side determines that the handover preparation is completed or determines that the handover preparation condition is completed, the network side sends a notification message to the UE that is receiving the MBMS service in the PTP manner to notify the MBMS service that the MBMS service is about to be sent.
- the switching is performed in the PTM mode, so that the UE that receives the notification message starts to prepare for handover and smoothly switches from the PTP mode to the PTM mode, thereby reducing a large number of interactions between the UE and the network side, and the conversion process is simplified and easy to implement.
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Abstract
本发明提供一种MBMS发送方式切换方法和***,所述方法包括:网络侧进行多媒体广播组播业务(MBMS)切换到点到多点(PTM)方式的切换准备;所述网络侧向正在以点到点(PTP)方式接收所述MBMS的用户设备(UE)发送通知消息,以通知所述MBMS即将切换为以PTM方式发送;所述UE根据所述通知消息进行切换到PTM方式的切换准备;以及完成切换准备后,所述网络侧和UE切换到PTM方式。本发明可以减少大量的UE与网络侧的交互,使得转化过程简化,易于实现。
Description
MBMS业务发送方式切换的方法和***
技术领域
本发明涉及多媒体广播组播业务( Multimedia Broadcast Multicast Service, MBMS ) , 尤其涉及一种 MBMS业务发送方式切换的方法和***。
背景技术
随着互联网的迅猛发展和大屏幕多功能手机的普及, 出现了大量移动数 据多媒体业务和各种高带宽多媒体业务, 例如: 视频会议、 电视广播、 视频 点播、 视频广告、 网上教育、 互动游戏等, 不仅满足了移动用户不断上升的 业务需求, 同时也为移动运营商带来新的业务增长点。 这些移动数据多媒体 业务要求多个用户能够同时接收相同数据, 与一般的数据业务相比, 具有数 据量大、 持续时间长、 时延敏感等特点。 为了有效地利用移动网络资源, 第 三代合作伙伴计划(3rd Generation Partnership Project, 简称为 3GPP )提出了 MBMS业务, 该业务是一种从一个数据源向多个目标传送数据的技术, 实现 了网络(包括核心网和接入网) 资源的共享, 提高了网络资源 (尤其是空中 接口资源) 的利用率。 3GPP定义的 MBMS业务不仅能够实现纯文本低速率 的消息类组播和广播, 还能够实现高速多媒体业务的广播和组播, 提供多种 丰富的视频、 音频和多媒体业务, 这无疑顺应了未来移动数据发展的趋势, 为 3G ( 3rd Generation, 第三代数字通信) 的发展提供了更好的业务前景。
在 LTE R10的 MBMS标准制定中 , 由电信运营商 ORANGE SA提出, MBMS业务可以按照运营商的需求, 在网络侧釆用点到点 (Point to Point, PTP )的方式为用户设备 ( User Equipment, UE )进行发送。 通过 LTE ( Long Term Evolution, 长期演进) 的多次会议讨论后, 得到了其他公司的支持和认 可, 并且在讨论 MBMS计数(Counting )议题中, 提出针对这一类业务进行 Counting, 根据 Counting的结果, 如果在 PTP方式下接收某一 MBMS业务的 用户数量满足门限要求后 (即接收的用户数量比较多时) , 那么则可以把该 MBMS 业务转换为釆用多媒体广播组播单频网 ( Multimedia Broadcast multicast service Single Frequency Network, MBSFN )方式 (是一种点到多点
( oint to multipoint, PTM ) 的方式, 并且是多小区联合发送的方式, 详见 LTE 36.300vlO.1.0协议的 15.3.3 Multi-cell transmission 的描述 ) 在某一 MBSFN区域内发送的 MBMS业务, 下面描述中釆用 PTM方式来进行描述。 当接收该 MBMS业务的用户数量超过一定门限后,发送方式由 PTP方式转为 PTM方式可以进一步提升发送该 MBMS业务的频谱效率, 节约频谱资源。
上述的 Counting是一种由网络侧发起的,针对一个或者多个 MBMS业务 统计正在接收或者感兴趣接收的 UE个数的方法。 具体过程为网络侧给 UE 发送需要进行 Counting的 MBMS业务的标识, 然后 UE判断自己是否正在接 收或者感兴趣接收这些 MBMS 业务, 如果正在接收或者感兴趣接收, 则该 UE向网络侧发送正在接收的信息。通过这个过程, 网络侧可以掌握哪些正在 发送的 MBMS业务比较受欢迎,接收的用户数量的多少等, 也可以获知一些 即将开始的 MBMS是否受欢迎, 是否有用户愿意接收。
那么在上述 PTP方式转为 PTM方式的过程是如何实现的, 以及如何保 证在发送方式切换的过程中, UE接收该 MBMS业务的连续性呢?
发明内容
本发明公开一种 MBMS 业务发送方式切换方法和***, 以解决尚未有 PTP方式切换为 PTM方式的方案的问题。 本发明提供一种 MBMS发送方式切换方法, 包括:
网络侧进行多媒体广播组播业务( MBMS )切换到点到多点 ( PTM )方 式的切换准备;
所述网络侧向正在以点到点 (PTP ) 方式接收所述 MBMS 的用户设备 ( UE )发送通知消息, 以通知所述 MBMS即将切换为以 PTM方式发送; 所述 UE根据所述通知消息进行切换到 PTM方式的切换准备; 以及 完成切换准备后, 所述网络侧和 UE切换到 PTM方式。 该方法中, 所述通知消息携带以下至少一个信息: 以 PTM方式发送所述 MBMS的开始时间、 多媒体广播组播单频网(MBSFN )区域的信息、 临时移
动组标识(TMGI ) 、 以及标识需要切换到 PTM方式的 PTP方式的 MBMS 的信息。 所述 UE进行切换到 PTM方式的切换准备的步骤包括: UE根据所述通 知消息进一步确定 MBSFN区域,接收该 MBSFN区域所对应的多播控制信道 信息并从所接收的多播控制信道信息中发现所述 MBMS。 所述网络侧切换到 PTM方式的步骤包括: 所述网络侧开始釆用 PTM方 式发送所述 MBMS , 并停止以 PTP方式发送所述 MBMS; 所述 UE切换到 PTM方式的步骤包括: 所述 UE开始釆用 PTM方式接 收所述 MBMS , 并停止釆用 PTP方式接收所述 MBMS。 所述网络侧釆用带确认机制发送所述通知消息; 所述方法还包括: 若所 述 UE未能正确接收所述通知消息, 则所述网络侧重发所述通知消息。 所述网络侧进行 MBMS切换到 PTM方式的切换准备的触发条件包括: 人工触发; ***设置; 或, 所述网络侧进行 MBMS的 PTP方式发送时, 统 计的正在以 PTP方式接收所述 MBMS的 UE数量和 /或感兴趣以 PTM方式接 收所述 MBMS的 UE数量达到预设门限值。 所述通知消息包含以 PTM方式发送所述 MBMS的开始时间, 所述网络 侧和所述 UE在所述开始时间到达时切换到所述 PTM方式。 所述网络侧向正在以 PTP方式接收所述 MBMS的 UE发送通知消息的步 骤包括: 所述网络侧判断切换准备完成或判断具备完成切换准备的条件后, 向正在以 PTP方式接收上述 MBMS的 UE发送通知消息。 本发明还提供一种 MBMS发送方式切换***, 包括:
网络侧的切换准备模块, 其设置成进行多媒体广播组播业务(MBMS ) 切换到点到多点 (PTM )方式的切换准备;
所述网络侧的切换通知模块, 其设置成向正在以点到点 (PTP ) 方式接 收上述 MBMS的用户设备 ( UE )发送通知消息, 以通知所述 MBMS即将切
换为 PTM方式发送;
所述 UE的切换准备模块, 其设置成根据所述通知消息进行切换到 PTM 方式的切换准备; 以及
所述网络侧和 UE的切换模块, 其设置成在完成切换准备后, 分别将所 述网络侧和所述 UE切换到 PTM方式。 所述网络侧还包括统计模块, 所述统计模块设置成: 在网络侧利用 PTP 方式发送 MBMS时 , 统计正在通过 PTP方式接收所述 MBMS的 UE数量和 / 或感兴趣以 PTM方式接收所述 MBMS的 UE数量; 所述网络侧的切换准备模块还设置成在以下触发条件下触发进行切换到 PTM方式的切换准备: 人工触发, ***设置或所述统计模块所统计的 UE数 量达到预设门限值。 所述通知消息携带以下至少一个信息: 以 PTM方式发送所述 MBMS的 开始时间、 多媒体广播组播单频网 (MBSFN ) 区域的信息或临时移动组标识 ( TMGI ) 、 以及标识需要切换到 PTM方式的 PTP方式的 MBMS的信息。 所述 UE的切换准备模块是设置成通过如下方式进行切换到 PTM方式的 切换准备: 接收与所述 MBMS相关的控制信息并发现所述 MBMS的标识。 所述网络侧的切换通知模块是设置成釆用带确认机制发送所述通知消 息, 并且还设置成在所述 UE未能正确接收所述通知消息时, 重发所述通知 消息。 所述网络侧的切换通知模块是设置成在判断切换准备完成或判断具备完 成切换准备的条件后,再向正在以 PTP方式接收所述 MBMS的 UE发送通知 消息。
所述网络侧的切换模块是设置成通过如下方式将网络侧切换到 PTM方 式: 使所述网络侧在所述开始时间达到时开始釆用 PTM方式发送 MBMS, 并停止以 PTP方式发送 MBMS;
所述 UE的切换模块是设置成通过如下方式将 UE切换到 PTM方式: 使 所述 UE在所述开始时间到达时开始釆用 PTM方式接收 MBMS,并停止釆用 PTP方式接收 MBMS。
本发明 MBMS业务发送方式切换方法和***,在网络侧判断切换准备完 成或判断具备完成切换准备的条件时, 向正在以 PTP方式接收上述 MBMS 业务的 UE发送通知消息, 以通知所述 MBMS业务即将切换为 PTM方式发 送, 从而使得接收到通知消息的 UE开始进行切换准备并顺利从 PTP方式切 换到 PTM方式。 附图概述
图 1是本发明 MBMS业务发送方式切换方法的实施例 1的流程示意图; 图 2是本发明 MBMS业务发送方式切换方法的实施例 2的流程示意图; 图 3是本发明 MBMS业务发送方式切换方法的实施例 3的流程示意图; 图 4是本发明 MBMS业务发送方式切换方法中网络侧釆用带确认机制发 送通知消息的示意图;
图 5是本发明 MBMS业务发送方式切换***实施例的模块结构示意图; 图 6是本发明 MBMS业务发送方式切换***的又一实施例的模块结构示 意图。 本发明的较佳实施方式
本发明 MBMS 业务发送方式切换方法和***的主要思想是在网络侧判 断切换准备完成或判断具备完成切换准备的条件时, 向正在以 PTP方式接收 上述 MBMS业务的 UE发送通知消息, 以通知所述 MBMS业务即将切换为 PTM方式发送, 从而使得接收到通知消息的 UE开始进行切换准备并顺利从 PTP方式切换到 PTM方式。
本发明中所说的切换准备指网络侧或 UE为了实现 PTP方式向 PTM方式 的最终切换, 在切换前做作的准备, 包括资源分配、 承载建立、 控制信息配
置等。 具体地, 由 PTP方式向 PTM方式切换之前, 网络侧的切换准备为网 络侧为需要转化为 PTM方式发送的 MBMS业务进行承载建立, 主要包括为 所述 MBMS配置 PTM方式的物理资源,以及根据所述 MBMS业务的调度优 先级别判断是否可以调度, 为该 MBMS配置相应的控制信息, 确定其调度发 送的时间等。 UE由 PTP方式向 PTM方式转化以接收所述 MBMS业务的切 换准备为 UE根据网络侧发送的信息建立以 PTM方式接收所述 MBMS业务 的准备, 主要包括建立承载, 根据网络侧发送的信息进一步接收相关控制信 息并从中发现所述 MBMS业务(例如该业务的 TMGI )等。 这里的相关控制 信息为所述 MBMS 业务的 PTM方式对应的 MBSFN 区域的多播控制信道 ( Multicast Control Channel , MCCH )信息。
下文中将结合附图对本发明的实施例进行详细说明。 需要说明的是, 在 不冲突的情况下, 本申请中的实施例及实施例中的特征可以相互组合。
实施例 1
4叚设在由一些固定位置的小区构成的某一 MBSFN区域内的部分小区正 在以 PTP方式为一些 UE提供某一 MBMS业务,该 MBMS业务未以 PTM方 式进行发送, 但是该 MBMS业务按照预先安排, 到了即将以 PTM方式发送 的时间点。
该实施例 1 中, 网络侧根据 counting (计数)结果触发其进行切换到 PTM 方式的切换准备, 进而判断切换准备完成时, 向正在以 PTP 方式接收上述 MBMS业务的 UE发送通知消息。如图 1所示, 该 MBMS业务发送方式切换 方法的实施例包括以下步骤:
步骤 101 :计数结果达到预设门限值,网络侧进行 MBMS业务切换到 PTM 方式的切换准备;
在该实施例中, 网络侧对于以 PTP方式发送的 MBMS业务进行计数, 以 获知是否需要釆用 PTM方式进行发送该 MBMS业务。 因为不同的场景下两 种发送方式的频谱效率高低不同, 一般的, 当在某一区域内釆用 PTP方式接 收某一 MBMS业务的 UE数量比较多,超过某一门限时(一般情况是 MBSFN 区域内平均每一个小区超过一个 UE以 PTP方式接收 MBMS时,就需要釆用 PTM方式) , 那么就应该切换为 PTM方式进行发送, 这样会提升频谱效率。
网络侧依据上述得到的该 MBMS业务在 UE侧的接收情况(包括正在通 过 PTP方式接收以及感兴趣通过 PTP方式接收所述 MBMS业务的 UE数量, 或者感兴趣通过 PTM方式接收所述 MBMS业务的 UE的数量 )确定是否改 变该 MBMS业务的发送方式。 一般会通过预设 UE数量的门限, 即当接收该 MBMS业务的 UE数量达到或超过这个门限值时, 则触发 PTP发送方式向 MBSFN发送方式的切换, 反之亦然。 门限值可以通过仿真获得。
需要获知一个或者多个以 PTP方式发送的 MBMS业务的 UE接收情况, 这里釆用的方式是已有的 counting过程, 网络侧通过 counting过程, 可以获 知一个或者多个 MBMS 业务在 UE侧的接收情况, 即针对一个正在发送的 MBMS业务, 获知(大概)有多少 UE正在接收, 也可以实现针对一个即将 发送的 MBMS业务, 获知将有多少 UE等待接收。
此时针对这一 MBMS业务进行 counting(根据 LTE现有的 counting机制), 统计正在以 PTP 方式接收该 MBMS 业务的 UE数量, 以及感兴趣接收该 MBMS业务的 UE数量, 经过计算, 由于 PTP方式接收的 UE数量以及感兴 趣接收的 UE数量较多 ,所以该 MBMS业务在该 MBSFN区域内釆用 PTM方 式可以获得更高的效率, 所以准备转化该 MBMS业务的发送方式。
网络侧获知需要针对该 PTP方式发送的 MBMS业务执行切换为 PTM方 式进行发送。 那么网络侧首先进行切换到 PTM方式的切换准备, 包括配置对 应的 PTM方式的资源, 调度优先级, 确定调度发送的时间等这些准备工作, 以及建立连接, 如建立 PTM方式的发送连接, 包括核心网侧的承载建立以及 无线网侧的承载建立。 网络侧需要为该 MBMS业务确定一个 MBSFN区域, 也可以在原有的 MBSFN区域内,然后就可以按照现有技术(具体参考 36.300、 36.331和 36.443相关协议中) 中在 MBSFN区域发送一个新业务的流程来执 行了。 在网络侧按照新的发送方式成功建立了连接后, 原有发送方式保持继 续。 网络侧可以通过 PTP 方式下的 MBMS 业务对应的临时移动组标识 ( Temporary Mobile Group Identity, TMGI )来确定是哪一个 MBMS业务的发 送方式发生转化。
步骤 102:网络侧判断切换准备完成,向正在以 PTP方式接收上述 MBMS
业务的 UE发送通知消息, 以通知所述 MBMS业务即将切换为 PTM方式发 送;
当网络侧判断其切换到 PTM方式的切换准备都完成后,则向正在以 PTP 方式接收上述 MBMS业务的 UE发送通知消息。 该通知消息的作用主要用于 通知 UE网络侧将对 PTP方式发送的 MBMS业务切换为 PTM方式发送, 可 以釆用隐式或显式的方式实现其通知目的。
显式的方式, 比如特定的消息类型, 或在消息中携带相应通知信息, 或 者在通知消息中携带需要切换为 PTM方式的 MBMS业务的信息,例如 MBMS 业务 ID, 或该 MBMS业务对应的 TMGI等, 总之能够指明是哪一个 PTP方 式的 MBMS业务需要切换为 PTM方式的信息。
隐式的方式,比如通过消息携带可使 UE了解该通知目的的其他信息(如 下文提及的 PTM方式发送所述 MBMS业务的开始时间等) 实现。
一般来说, 为了实现其通知目的, 该通知消息需要携带针对的 MBMS业 务的业务标识信息, 可理解的, 网络侧在发送给 UE的通知消息中也可不携 带相应的 MBMS业务的业务标识信息, 这种情况下, 如果所有 UE只有一个 PTP方式的 MBMS业务, 那么当 UE接收到通知消息后, UE确认正在接收 的 MBMS业务即将切换为 PTM方式发送。
步骤 103: UE根据所述通知消息进行切换到 PTM方式的切换准备;
UE根据接收到网络侧的通知消息, 进行切换到 PTM接收方式的切换准 备, 包括连接建立等。
一般情况下, 网络侧需要给 UE预留一定的时间,保证 UE能够在预留时 间内完成新接收方式的连接建立。
步骤 104: 完成切换准备后, 所述网络侧和 UE切换到 PTM方式。
UE在接收到网络侧发送的通知所述 PTP方式发送的 MBMS业务即将发 生改变时的消息后,根据所述消息直接开始建立 PTM方式接收连接, 准备结 束后直接开始釆用 PTM方式尝试接收该 MBMS 业务, 直到发现和接收到 PTM方式下的该 MBMS业务。 然后释放掉原有的 PTP方式连接。 网络侧也 可以在一段时间后停止为该 UE发送 PTP方式的该 MBMS业务, 释放原有
PTP方式的资源。这里的一段时间可以预设为 ΡΤΜ方式开始发送后的一段时 间, 例如 5秒后。
所述网络侧切换到 ΡΤΜ方式包括开始釆用 ΡΤΜ方式发送 MBMS业务, 停止 ΡΤΡ方式发送 MBMS业务, 解除 PTP方式的承载, 以及释放 PTP方式 的资源等; 所述 UE切换到 PTM方式包括: 开始釆用 PTM方式接收 MBMS 业务, 停止釆用 PTP方式接收 MBMS业务, 解除 PTP方式的承载, 以及释 放 PTP方式的资源等。
上述流程保证了 PTP发送方式转化为 PTM发送方式时 MBMS业务的连 续性, 该方法非常简单, 减少了网络侧和 UE的交互过程, 简化了流程。
实施例 2
4叚设在由一些位置固定小区构成的某一 MBSFN区域内的部分小区正在 以 PTP方式为一些 UE提供某一 MBMS业务,该 MBMS业务未以 PTM方式 进行发送, 该 MBMS业务是正在以 PTP方式发送的, 并未计划以 PTM方式 发送, 或距离预先安排的以 PTM方式的时间点尚早。
该实施例 2中,网络侧直接根据运营商需求进行切换到 PTM方式的切换 准备, 进而判断具备完成切换准备的条件时, 向正在以 PTP 方式接收上述 MBMS业务的 UE发送通知消息。
如图 2所示, 该实施例包括以下步骤:
步骤 201 :计数结果达到预设门限值,网络侧进行 MBMS业务切换到 PTM 方式的切换准备;
该实施例 2中, 运营商针对所述 MBMS业务进行统计, 与实施例 1不同 的是, 这里不釆用现有 counting机制, 釆用其他方式, 因为 PTP方式是要求 UE在 RRC— Connected (连接 )状态下进行的, 所以网络侧可以针对每一个连 接状态的 UE查看其正在接收的 MBMS业务标识, 从而确定 UE是否接收某 一 MBMS业务,这样网络侧也可以获知 PTP方式下 MBMS业务的接收情况。
这种方式仅仅统计正在以 PTP方式接收该 MBMS业务的 UE数量,经过 计算, 由于 PTP方式接收的 UE数量较多, 所以该 MBMS业务在该 MBSFN
区域内釆用 PTM方式可以获得更高的效率, 所以准备转化该 MBMS业务的 发送方式。
网络侧判断需要针对该 PTP方式发送的 MBMS业务执行转化为 PTM方 式进行发送。 那么网络侧首先进行切换到 PTM方式的切换准备, 即配置对应 的 PTM方式的资源, 调度优先级, 确定调度发送的时间等这些准备工作, 以 及建立连接。
步骤 202: 网络侧判断具备完成切换准备的条件时, 向正在以 PTP方式 接收上述 MBMS业务的 UE发送通知消息, 以通知所述 MBMS业务即将切 换为 PTM方式发送;
网络侧已经可以预先确定新的发送方式肯定可以建立成功 (例如发送业 务的资源足够、 发送业务的优先级别足够高等) , 即已经可以判断具备完成 切换准备的条件时, 网络侧给 PTP方式接收该 MBMS业务的 UE发送通知消 息, 该通知消息主要是为了通知这些 UE, 该 MBMS业务原有的 PTP发送 / 接收方式即将停止, 进一步釆用新的 PTM发送 /接收方式。 与实施例 1不同 的是, 为了帮助该 UE快速建立 PTM接收方式, 该通知消息中包含网络侧釆 用 PTM方式发送该 MBMS业务的开始时间。
这个步骤需要釆用带确认机制, 如图 4所示, 即网络侧把所述通知消息 发送给 UE, 如果 UE正确接收后, 需要给网络侧发送确认已经正确接收的信 息。 因为这条消息是在进行 PTP方式到 PTM方式的转化过程中, 唯一的网 络侧发送给 UE的消息, 只有 UE正确接收后, 才能进一步保证 UE接收该 MBMS业务的连续性。 所以 UE是否正确接收到该消息, 是需要回复给网络 侧, 如果 UE没有正确接收, 那么网络侧需要调整该消息后再重新发送给该 UE。
步骤 203: UE根据所述通知消息进行切换到 PTM方式的切换准备; UE根据接收到网络侧的通知消息, 进行切换到 PTM接收方式的切换准 备, 包括接收相关控制信息(MCCH ) , 从中发现所述 MBMS业务、 连接建 立等。
步骤 204: 完成切换准备后, 所述网络侧和 UE切换到 PTM方式。
UE完成切换准备后, 根据接收的通知消息中的开始时间, UE在相应的 PTM方式开始时间开始釆用 PTM方式接收所述 MBMS业务, 同时 UE停止 原有方式进行接收所述 MBMS业务, 网络侧停止原有方式为该 UE继续发送 所述 MBMS业务, 释放原有 PTP方式的资源。 此时 UE和网络侧不再需要进 行交互了。
上述流程保证了 PTP发送方式转化为 PTM发送方式时 MBMS业务的连 续性, 该方法非常简单, 减少了网络侧和 UE的交互过程, 简化了流程。
实施例 3
4叚设在由一些位置固定小区构成的某一 MBSFN区域内的部分小区正在 以 PTP方式为一些 UE提供某一 MBMS业务,该 MBMS业务未以 PTM方式 进行发送。
该实施例 3中, 网络侧直接根据运营商需求或***设置进行切换到 PTM 方式的切换准备, 进而判断具备完成切换准备的条件时, 向正在以 PTP方式 接收上述 MBMS业务的 UE发送通知消息。 如图 3所示, 该 MBMS业务发 送方式切换方法的实施例包括以下步骤:
步骤 301 : 根据运营商需求或***设置, 网络侧进行 MBMS业务切换到 PTM方式的切换准备;
在一些情况下, 运营商想改变该 MBMS业务的发送方式, 例如, 运营商 考虑到所述区域内资源不是很紧张,想要通过 PTM方式发送,扩大该 MBMS 业务发送的覆盖范围,或者,运营商为了到达某些运营目的,而需要釆用 PTM 方式在所述整个 MBSFN区域内进行发送, 同时又考虑到釆用 PTM方式后, 为了节约资源不再进一步釆用 PTP方式为上述 UE进行发送所述 MBMS业 务。 那么运营商触发网络侧进行切换到 PTM方式的切换准备。
网络侧获知需要针对该 PTP方式发送的 MBMS业务执行转化为 PTM方 式进行发送。 那么网络侧首先进行 PTM方式的准备, 即配置对应的 PTM方 式的资源, 调度优先级, 确定调度发送的时间等这些准备工作, 以及建立连 接。
步骤 302: 网络侧判断具备完成切换准备的条件时, 向正在以 PTP方式 接收上述 MBMS业务的 UE发送通知消息, 以通知所述 MBMS业务即将切 换为 PTM方式发送;
网络侧已经可以预先确定新的发送方式肯定可以建立成功 (例如发送业 务的资源足够、 发送业务的优先级别足够高等) , 即已经可以判断具备完成 切换准备的条件时, 网络侧给以 PTP方式接收该 MBMS业务的 UE发送通知 消息, 该通知消息主要是为了通知这些 UE, 该 MBMS业务原有的 PTP发送 /接收方式即将停止, 进一步釆用新的 PTM发送 /接收方式。 与实施例 2不同 的是, 优选地, 该通知消息中包含网络侧釆用 PTM方式发送该 MBMS业务 的开始时间、 MBSFN区域信息(即新方式下所述 MBMS业务所在的 MBSFN 区域) 、 釆用的 TMGI信息。 这个步骤需要釆用带确认的机制, 因为这条消 息是在进行 PTP方式到 PTM方式的转化过程中,唯一的网络侧发送给 UE的 消息, 只有 UE正确接收后, 才能进一步保证 UE接收该 MBMS业务的连续 性。 所以 UE是否正确接收到该消息, 是需要回复给网络侧, 如果 UE没有正 确接收, 那么网络侧需要调整该消息后再重新发送给该 UE。
步骤 303: UE根据所述通知消息进行切换到 PTM方式的切换准备; UE 根据接收到网络侧的通知消息, 进行新的 PTM接收方式的建立。
步骤 304: 完成切换准备后, 所述网络侧和 UE切换到 PTM方式。
UE完成切换准备后, 根据接收的通知消息中的网络侧釆用 PTM方式发 送该 MBMS业务的开始时间、 MBSFN区域信息(即新方式下所述 MBMS业 务所在的 MBSFN区域)、 釆用的 TMGI信息, 直接开始在相应的 PTM方式 开始时间、 指定的 MBSFN区域内接收指定的 TMGI对应的业务即可, 在所 述开始时间点到达后, UE 自主停止原有的 PTP接收方式, 释放其原有 PTP 方式的资源。 在所述开始时间点到达后网络侧也释放原有的 PTP发送方式, 释放原有 PTP方式的资源。
上述流程保证了 PTP发送方式转化为 PTM发送方式时 MBMS业务的连 续性, 该方法非常简单, 减少了网络侧和 UE的交互过程, 简化了流程。
以上实施例 1和实施例 2中, 网络侧都是通过统计正在接收和 /或感兴趣 接收所述 MBMS业务的 UE,进而了解 MBMS业务的接收的实际情况和可能
的情形, 来触发进行切换到 ΡΤΜ方式的切换准备的。
以上实施例 2与实施例 3相比, 因实施例 2中通知消息仅携带网络侧釆 用 ΡΤΜ方式发送的开始时间, UE需要自己检索当前小区的所有 MBSFN区 域来发现原有 ΡΤΡ方式时对应的 MBMS业务, 增加了 UE的检索过程。
可替换地,通知消息中可携带以下任一信息: PTM方式发送所述 MBMS 业务的开始时间、 MBSFN区域的信息或临时移动组标识(TMGI ) , 当然也 可携带其他有助于 UE进行接收方式切换的其他信息, 本发明对此不做限定。
以上实施例中, 具体执行的网络侧网元可以是多小区协调实体 ( Multi-cell/multicast Coordination Entity , MCE ) 、 广播组播业务中心 ( Broadcast-Multicast - Service Centre , BMSC ) 、 MBMS 网关 (MBMS GateWay, MBMS GW ) 、 eNB、 移动管理实体( Mobility Management Entity, MME )中的一个或者多个, 如果是多个, 那么这多个网元之间需要进一步进 行信息的交互。
为实现以上实施例方法,本发明还提供了一种 MBMS业务发送方式切换 ***, 如图 5所示, 该***包括:
网络侧的切换准备模块, 其设置成进行 MBMS业务切换到 PTM方式的 切换准备;
所述网络侧的切换通知模块, 其设置成向正在以 PTP 方式接收上述 MBMS业务的 UE发送通知消息, 以通知所述 MBMS业务即将切换为 PTM 方式发送;
所述 UE的切换准备模块, 其设置成根据所述通知消息进行切换到 PTM 方式的切换准备; 以及
所述网络侧和 UE的切换模块, 其设置成在完成切换准备后, 分别将所 述网络侧和所述 UE切换到 PTM方式。
另一***实施例中, 如图 6所示, 与图 5所示的***的区别在于, 所述 网络侧还包括统计模块, 该统计模块设置成在网络侧利用 PTP 方式发送 MBMS业务时, 统计正在通过 PTP方式接收所述 MBMS业务的 UE数量和 / 或感兴趣以 PTM方式接收所述 MBMS业务的 UE的数量;统计的 UE数量达
到预设门限值时,所述网络侧的切换准备模块触发进行切换到 PTM方式的切 换准备。
除以上触发方式外, 可替换地, 所述网络侧的切换准备模块进行 MBMS 业务切换到 PTM方式的切换准备的触发条件包括: 人工触发或***设置。
进一步地, 所述通知消息携带以下至少一个信息: PTM方式发送所述
MBMS业务的开始时间、 MBSFN区域的信息或 TMGI、以及标识需要切换到 PTM方式的 PTP方式的 MBMS业务的信息。 这里 MBSFN区域的信息是指 能够标识出所述 MBMS业务以 PTM方式在哪一个 MBSFN区域内发送的信 息 , 例如 MBSFN区域 ID; 这里的 TMGI是指所述 MBMS业务以 PTM方式 在 MBSFN区域内发送时所使用的 TMGI。
进一步地, 所述 UE进行切换到 PTM方式的切换准备包括接收与所述 MBMS相关的控制信息并发现所述 MBMS业务的标识。
进一步地, 所述网络侧的切换通知模块釆用带确认机制发送所述通知消 息, 所述 UE未能正确接收时, 重发所述通知消息。
进一步地, 所述网络侧的切换通知模块判断切换准备完成或判断具备完 成切换准备的条件后,再向正在以 PTP方式接收上述 MBMS业务的 UE发送 通知消息。
进一步地, 所述通知消息包含以所述 PTM方式发送所述 MBMS业务的 开始时间时, 所述网络侧的切换模块使所述网络侧在所述开始时间到达时开 始釆用 PTM方式发送 MBMS业务,并停止以 PTP方式发送 MBMS业务,所 述 UE的切换模块使所述 UE在所述开始时间到达时开始釆用 PTM方式接收 MBMS业务, 并停止釆用 PTP方式接收 MBMS业务。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序 来指令相关硬件完成, 所述程序可以存储于计算机可读存储介质中, 如只读 存储器、 磁盘或光盘等。 可选地, 上述实施例的全部或部分步骤也可以使用 一个或多个集成电路来实现。 相应地, 上述实施例中的各模块 /单元可以釆用 硬件的形式实现, 也可以釆用软件功能模块的形式实现。 本发明不限制于任 何特定形式的硬件和软件的结合。
可以发现上述整个过程中, 网络侧与 UE仅交互了一次, 这样可以减少 大量的 UE与网络侧的交互。 使得转化过程简化, 易于实现。
工业实用性
与现有技术相比, 本发明中, 网络侧在判断切换准备完成或判断具备完 成切换准备的条件时,向正在以 PTP方式接收上述 MBMS业务的 UE发送通 知消息, 以通知所述 MBMS业务即将切换为 PTM方式发送, 从而使得接收 到通知消息的 UE开始进行切换准备并顺利从 PTP方式切换到 PTM方式,减 少了大量的 UE与网络侧的交互, 转化过程简化, 易于实现。
Claims
1、 一种 MBMS发送方式切换方法, 包括:
网络侧进行多媒体广播组播业务( MBMS )切换到点到多点 ( PTM )方 式的切换准备;
所述网络侧向正在以点到点 ( PTP ) 方式接收所述 MBMS 的用户设备
( UE )发送通知消息, 以通知所述 MBMS即将切换为以 PTM方式发送; 所述 UE根据所述通知消息进行切换到 PTM方式的切换准备; 以及 完成切换准备后, 所述网络侧和 UE切换到 PTM方式。
2、 如权利要求 1所述的方法, 其中, 所述通知消息携带以下至少一个信 息: 以 PTM 方式发送所述 MBMS 的开始时间、 多媒体广播组播单频网
( MBSFN ) 区域的信息、 临时移动组标识 (TMGI ) 、 以及标识需要切换到 PTM方式的 PTP方式的 MBMS的信息。
3、 如权利要求 1所述的方法, 其中, 所述 UE进行切换到 PTM方式的 切换准备的步骤包括: UE根据所述通知消息进一步确定 MBSFN区域, 接收该 MBSFN区域所 对应的多播控制信道信息并从所接收的多播控制信道信息中发现所述 MBMS„
4、 如权利要求 1或 2所述的方法, 其中, 所述网络侧切换到 PTM方式 的步骤包括:所述网络侧开始釆用 PTM方式发送所述 MBMS,并停止以 PTP 方式发送所述 MBMS; 所述 UE切换到 PTM方式的步骤包括: 所述 UE开始釆用 PTM方式接 收所述 MBMS , 并停止釆用 PTP方式接收所述 MBMS。
5、 如权利要求 1所述的方法, 其中, 所述网络侧釆用带确认机制发送所 述通知消息; 所述方法还包括: 若所述 UE未能正确接收所述通知消息, 则所述网络 侧重发所述通知消息。
6、如权利要求 1所述的方法,其中,所述网络侧进行 MBMS切换到 PTM 方式的切换准备的触发条件包括:
人工触发;
***设置;
或, 所述网络侧进行 MBMS的 PTP方式发送时, 统计的正在以 PTP方 式接收所述 MBMS的 UE数量和 /或感兴趣以 PTM方式接收所述 MBMS的
UE数量达到预设门限值。
7、 如权利要求 4所述的方法, 其中, 所述通知消息包含以 PTM方式发 送所述 MBMS的开始时间, 所述网络侧和所述 UE在所述开始时间到达时切 换到所述 PTM方式。
8、 如权利要求 1所述的方法, 其中, 所述网络侧向正在以 PTP方式接 收所述 MBMS的 UE发送通知消息的步骤包括: 所述网络侧判断切换准备完 成或判断具备完成切换准备的条件后, 向正在以 PTP方式接收上述 MBMS 的 UE发送通知消息。
9、 一种 MBMS发送方式切换***, 包括:
网络侧的切换准备模块, 其设置成进行多媒体广播组播业务(MBMS ) 切换到点到多点 (PTM )方式的切换准备;
所述网络侧的切换通知模块, 其设置成向正在以点到点 (PTP ) 方式接 收上述 MBMS的用户设备 ( UE )发送通知消息, 以通知所述 MBMS即将切 换为 PTM方式发送;
所述 UE的切换准备模块, 其设置成根据所述通知消息进行切换到 PTM 方式的切换准备; 以及
所述网络侧和 UE的切换模块, 其设置成在完成切换准备后, 分别将所 述网络侧和所述 UE切换到 PTM方式。
10、 如权利要求 9所述的***, 其中, 所述网络侧还包括统计模块, 所 述统计模块设置成: 在网络侧利用 PTP方式发送 MBMS时, 统计正在通过 PTP 方式接收所述 MBMS 的 UE数量和 /或感兴趣以 PTM方式接收所述 MBMS的 UE数量; 所述网络侧的切换准备模块还设置成在以下触发条件下触发进行切换到 PTM方式的切换准备: 人工触发, ***设置或所述统计模块所统计的 UE数 量达到预设门限值。
11、 如权利要求 9所述的***, 其中, 所述通知消息携带以下至少一个 信息: 以 PTM方式发送所述 MBMS 的开始时间、 多媒体广播组播单频网
( MBSFN ) 区域的信息或临时移动组标识 (TMGI ) 、 以及标识需要切换到 PTM方式的 PTP方式的 MBMS的信息。
12、 如权利要求 9所述的***, 其中, 所述 UE的切换准备模块是设置 成通过如下方式进行切换到 PTM方式的切换准备: 接收与所述 MBMS相关 的控制信息并发现所述 MBMS的标识。
13、 如权利要求 9所述的***, 其中, 所述网络侧的切换通知模块是设 置成釆用带确认机制发送所述通知消息, 并且还设置成在所述 UE未能正确 接收所述通知消息时, 重发所述通知消息。
14、 如权利要求 9所述的***, 其中, 所述网络侧的切换通知模块是设 置成在判断切换准备完成或判断具备完成切换准备的条件后, 再向正在以 PTP方式接收所述 MBMS的 UE发送通知消息。
15、 如权利要求 11所述的***, 其中, 所述通知消息包含以所述 PTM 方式发送所述 MBMS的开始时间;
所述网络侧的切换模块是设置成通过如下方式将网络侧切换到 PTM方 式: 使所述网络侧在所述开始时间达到时开始釆用 PTM方式发送 MBMS, 并停止以 PTP方式发送 MBMS;
所述 UE的切换模块是设置成通过如下方式将 UE切换到 PTM方式: 使 所述 UE在所述开始时间到达时开始釆用 PTM方式接收 MBMS,并停止釆用 PTP方式接收 MBMS。
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CN104995932B (zh) * | 2013-09-26 | 2020-01-10 | 华为技术有限公司 | 一种无线资源分配的方法及装置 |
WO2015096160A1 (zh) * | 2013-12-27 | 2015-07-02 | 华为技术有限公司 | 一种保持业务连续性的方法及设备 |
CN113438692B (zh) * | 2020-03-23 | 2023-10-27 | 维沃移动通信有限公司 | 传输模式转换指示方法、接入网设备及终端设备 |
CN113498147B (zh) * | 2020-04-03 | 2022-09-20 | 维沃移动通信有限公司 | 业务发送方法、业务发送模式配置方法及相关设备 |
CN113950002B (zh) * | 2020-07-15 | 2023-05-26 | 大唐移动通信设备有限公司 | 一种广播组播传输方式的切换方法、终端及基站 |
CN114079874B (zh) * | 2020-08-17 | 2023-04-14 | 大唐移动通信设备有限公司 | Mbms业务的传输模式指示方法、装置及存储介质 |
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