Method, device and computer-readable medium for adjusting multimedia broadcast multicast service coverage

Abstract

A method for adjusting cell coverage of a multimedia broadcast multicast service is disclosed. An example method (700) may include transmitting (701) data of a multimedia broadcast multicast service on a point-to-multipoint channel, monitoring (702) information about abnormal reception of the data on an uplink channel, and adjusting (703) coverage of the point-to-multipoint channel based on the monitoring. Related devices and computer-readable media are also disclosed.

Description

Technical Field

[0001] Various embodiments relate to methods, apparatus, and computer-readable media for adjusting coverage of a multimedia broadcast multicast service (MBMS). Background Art

[0002] MBMS may be supported in telecommunication systems such as Long Term Evolution (LTE) systems, New Radio (NR or 5G) systems, and the like. Summary of the invention

[0003] In a first aspect, a method is disclosed, comprising: transmitting data of a multimedia broadcast multicast service on a point-to-multipoint channel; monitoring information about abnormal reception of the data on an uplink channel; and adjusting the coverage of the point-to-multipoint channel based on the monitoring. For example, the method may be performed in a base station.

[0004] In some embodiments, the method may further include: starting a timer in response to the transmission of data of the multimedia broadcast multicast service on the point-to-multipoint channel; and stopping the timer in response to the reception of information about the abnormal reception on the uplink channel before the timer expires.

[0005] In some embodiments, the coverage of the point-to-multipoint channel may be reduced in response to expiration of the timer, and / or the coverage of the point-to-multipoint channel may be expanded based on information about the abnormal reception received before stopping the timer.

[0006] In some embodiments, the adjustment of the coverage range of the point-to-multipoint channel may include at least one of the following: reducing the coverage range of the point-to-multipoint channel by at least one of reducing the transmission power of the point-to-multipoint channel or improving the modulation and coding strategy level of the point-to-multipoint channel; or expanding the coverage range of the point-to-multipoint channel by at least one of improving the transmission power of the point-to-multipoint channel or reducing the modulation and coding strategy level of the point-to-multipoint channel.

[0007] In some embodiments, the information about the abnormal reception may include information about at least one of the following: an indication of the abnormal reception; at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service; at least one ongoing multimedia broadcast multicast service in the current cell or in a service cell providing one or more multimedia broadcast multicast services; at least one correctly received multimedia broadcast multicast service in the current cell or in the service cell providing one or more multimedia broadcast multicast services; at least one multimedia broadcast multicast service of interest in the current cell or in the service cell providing one or more multimedia broadcast multicast services, etc.

[0008] In some embodiments, the at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service may include at least one of the following: a detected signal-to-noise ratio on the point-to-multipoint channel associated with the multimedia broadcast multicast service; a detected channel quality information on the point-to-multipoint channel associated with the multimedia broadcast multicast service; a detected block error rate on the point-to-multipoint channel associated with the multimedia broadcast multicast service; a detected packet error rate on the point-to-multipoint channel associated with the multimedia broadcast multicast service, etc.

[0009] In some embodiments, the information about the abnormal reception may be received via at least one of the following: radio resource control signaling, a medium access control element, physical signaling, a preamble, and the like.

[0010] In some embodiments, the method may further include transmitting information about at least one of the following via at least one of radio resource control signaling, system information, dedicated signaling, etc.: configuration of the information about the abnormal reception; information about the timer for monitoring the information about the abnormal reception; at least one ongoing multimedia broadcast multicast service in the current cell or in a service cell providing one or more multimedia broadcast multicast services; at least one quality threshold on the point-to-multipoint channel associated with the multimedia broadcast multicast service, etc.

[0011] In some embodiments, the configuration of the information about the abnormal reception may be associated with the multimedia broadcast multicast service.

[0012] In some embodiments, the data of the multimedia broadcast multicast service on the point-to-multipoint channel may include at least one of the following: control signaling of the multimedia broadcast multicast service on the multicast control channel, service data of the multimedia broadcast multicast service on the multicast service channel, etc.

[0013] In some embodiments, transmission of the multimedia broadcast multicast service data, transmission of information such as configuration of the information about the abnormal reception, and reception of the information about the abnormal reception may be associated with different serving cells.

[0014] In a second aspect, an apparatus is disclosed that can be configured to perform at least the method of the first aspect. The apparatus may include at least one processor and at least one memory. The at least one memory may include computer program code, and the at least one memory and the computer program code may be configured to, together with the at least one processor, cause the apparatus to perform: transmitting data of a multimedia broadcast multicast service on a point-to-multipoint channel, monitoring information about abnormal reception of the data on an uplink channel, and adjusting the coverage of the point-to-multipoint channel based on the monitoring. For example, the apparatus may be at least a portion of a base station.

[0015] In some embodiments, the at least one memory and the computer program code may be further configured to, together with the at least one processor, cause the apparatus to: start a timer in response to transmission of data of the multimedia broadcast multicast service on the point-to-multipoint channel; and stop the timer in response to receipt of information about the abnormal reception on the uplink channel before expiration of the timer.

[0016] In some embodiments, the coverage of the point-to-multipoint channel may be reduced in response to expiration of the timer, and / or the coverage of the point-to-multipoint channel may be expanded based on information about the abnormal reception received before stopping the timer.

[0017] In some embodiments, the adjustment of the coverage range of the point-to-multipoint channel may include at least one of the following: reducing the coverage range of the point-to-multipoint channel by at least one of reducing the transmission power of the point-to-multipoint channel or improving the modulation and coding strategy level of the point-to-multipoint channel; or expanding the coverage range of the point-to-multipoint channel by at least one of improving the transmission power of the point-to-multipoint channel or reducing the modulation and coding strategy level of the point-to-multipoint channel.

[0018] In some embodiments, the information about the abnormal reception may include information about at least one of the following: an indication of abnormal reception; at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service; at least one ongoing multimedia broadcast multicast service in the current cell or in a service cell providing one or more multimedia broadcast multicast services; at least one correctly received multimedia broadcast multicast service in the current cell or in the service cell providing one or more multimedia broadcast multicast services; at least one multimedia broadcast multicast service of interest in the current cell or in the service cell providing one or more multimedia broadcast multicast services, etc.

[0019] In some embodiments, the at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service may include at least one of the following: a signal-to-noise ratio detected on the point-to-multipoint channel associated with the multimedia broadcast multicast service; channel quality information detected on the point-to-multipoint channel associated with the multimedia broadcast multicast service; a block error rate detected on the point-to-multipoint channel associated with the multimedia broadcast multicast service; a packet error rate detected on the point-to-multipoint channel associated with the multimedia broadcast multicast service, and the like.

[0020] In some embodiments, the information about the abnormal reception may be received via at least one of: radio resource control signaling, a medium access control element, physical signaling, a preamble, and the like.

[0021] In some embodiments, the at least one memory and the computer program code can be further configured to, together with the at least one processor, cause the device to execute: transmitting information about at least one of the following via at least one of radio resource control signaling, system information, dedicated signaling, etc.: configuration of the information about the abnormal reception; information about the timer for monitoring the information about the abnormal reception; at least one ongoing multimedia broadcast multicast service in the current cell or in a service cell providing one or more multimedia broadcast multicast services; at least one quality threshold on the point-to-multipoint channel associated with the multimedia broadcast multicast service, etc.

[0022] In some embodiments, the configuration of the information about the abnormal reception may be associated with the multimedia broadcast multicast service.

[0023] In some embodiments, the data of the multimedia broadcast multicast service on the point-to-multipoint channel may include at least one of the following: control signaling of the multimedia broadcast multicast service on a multicast control channel, service data of the multimedia broadcast multicast service on a multicast service channel, etc.

[0024] In some embodiments, the transmission of the multimedia broadcast multicast service data, the transmission of information such as configuration of the information about the abnormal reception, and the reception of the information about the abnormal reception may be associated with different serving cells.

[0025] In a third aspect, a device is disclosed, which can be configured to perform at least the method of the first aspect. The device may include means for transmitting data of a multimedia broadcast multicast service on a point-to-multipoint channel; means for monitoring information about abnormal reception of the data on an uplink channel; and means for adjusting the coverage of the point-to-multipoint channel based on the monitoring. For example, the device may be at least a part of a base station.

[0026] In some embodiments, the device may further include: a device for starting a timer in response to the transmission of data of the multimedia broadcast multicast service on the point-to-multipoint channel; and a device for stopping the timer in response to the reception of information about the abnormal reception on the uplink channel before the expiration of the timer.

[0027] In some embodiments, the coverage of the point-to-multipoint channel may be reduced in response to expiration of the timer, and / or the coverage of the point-to-multipoint channel may be expanded based on information about the abnormal reception received before stopping the timer.

[0028] In some embodiments, the adjustment of the coverage range of the point-to-multipoint channel may include at least one of the following: reducing the coverage range of the point-to-multipoint channel by at least one of reducing the transmission power of the point-to-multipoint channel or improving the modulation and coding strategy level of the point-to-multipoint channel; or expanding the coverage range of the point-to-multipoint channel by at least one of improving the transmission power of the point-to-multipoint channel or reducing the modulation and coding strategy level of the point-to-multipoint channel.

[0029] In some embodiments, the information about the abnormal reception may include information about at least one of the following: an indication of the abnormal reception; at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service; at least one ongoing multimedia broadcast multicast service in the current cell or in a service cell providing one or more multimedia broadcast multicast services; at least one correctly received multimedia broadcast multicast service in the current cell or in the service cell providing one or more multimedia broadcast multicast services; at least one multimedia broadcast multicast service of interest in the current cell or in the service cell providing one or more multimedia broadcast multicast services, etc.

[0030] In some embodiments, the at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service may include at least one of the following: a signal-to-noise ratio detected on the point-to-multipoint channel associated with the multimedia broadcast multicast service; channel quality information detected on the point-to-multipoint channel associated with the multimedia broadcast multicast service; a block error rate detected on the point-to-multipoint channel associated with the multimedia broadcast multicast service; a packet error rate detected on the point-to-multipoint channel associated with the multimedia broadcast multicast service, and the like.

[0031] In some embodiments, the information about the abnormal reception may be received via at least one of: radio resource control signaling, a medium access control element, physical signaling, a preamble, and the like.

[0032] In some embodiments, the device may further include a device for transmitting at least one of the following information via at least one of radio resource control signaling, system information, dedicated signaling, etc.: configuration of the information about the abnormal reception; information about the timer for monitoring the information about the abnormal reception; at least one ongoing multimedia broadcast multicast service in the current cell or in a service cell providing one or more multimedia broadcast multicast services; at least one quality threshold on the point-to-multipoint channel associated with the multimedia broadcast multicast service, etc.

[0033] In some embodiments, the configuration of the information about the abnormal reception may be associated with the multimedia broadcast multicast service.

[0034] In some embodiments, the data of the multimedia broadcast multicast service on the point-to-multipoint channel may include at least one of the following: control signaling of the multimedia broadcast multicast service on the multicast control channel, service data of the multimedia broadcast multicast service on the multicast service channel, etc.

[0035] In some embodiments, the transmission of the multimedia broadcast multicast service data, the transmission of information such as configuration of the information about the abnormal reception, and the reception of the information about the abnormal reception may be associated with different serving cells.

[0036] In a fourth aspect, a computer-readable medium is disclosed. The computer-readable medium may include instructions stored thereon for causing an apparatus to perform the method in the first aspect. The instructions may cause the apparatus to perform transmission of data of a multimedia broadcast multicast service on a point-to-multipoint channel, monitoring information about abnormal reception of the data on an uplink channel, and adjusting the coverage of the point-to-multipoint channel based on the monitoring. For example, the apparatus may be at least a portion of a base station.

[0037] In some embodiments, the instructions may cause the device to further execute: starting a timer in response to the transmission of data of the multimedia broadcast multicast service on the point-to-multipoint channel, and stopping the timer in response to the reception of information about the abnormal reception on the uplink channel before the timer expires.

[0038] In some embodiments, the coverage of the point-to-multipoint channel may be reduced in response to expiration of the timer, and / or the coverage of the point-to-multipoint channel may be expanded based on information about the abnormal reception received before stopping the timer.

[0039] In some embodiments, the adjustment of the coverage range of the point-to-multipoint channel may include at least one of the following: reducing the coverage range of the point-to-multipoint channel by at least one of reducing the transmission power of the point-to-multipoint channel or improving the modulation and coding strategy level of the point-to-multipoint channel; or expanding the coverage range of the point-to-multipoint channel by at least one of improving the transmission power of the point-to-multipoint channel or reducing the modulation and coding strategy level of the point-to-multipoint channel.

[0040] In some embodiments, the information about the abnormal reception may include information about at least one of the following: an indication of abnormal reception; at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service; at least one ongoing multimedia broadcast multicast service in the current cell or in a service cell providing one or more multimedia broadcast multicast services; at least one correctly received multimedia broadcast multicast service in the current cell or in the service cell providing one or more multimedia broadcast multicast services; at least one multimedia broadcast multicast service of interest in the current cell or in the service cell providing one or more multimedia broadcast multicast services, etc.

[0041] In some embodiments, the at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service may include at least one of the following: a signal-to-noise ratio detected on the point-to-multipoint channel associated with the multimedia broadcast multicast service; channel quality information detected on the point-to-multipoint channel associated with the multimedia broadcast multicast service; a block error rate detected on the point-to-multipoint channel associated with the multimedia broadcast multicast service; a packet error rate detected on the point-to-multipoint channel associated with the multimedia broadcast multicast service, and the like.

[0042] In some embodiments, the information about the abnormal reception may be received via at least one of: radio resource control signaling, a medium access control element, physical signaling, a preamble, and the like.

[0043] In some embodiments, the instruction may cause the device to further execute: transmitting information about at least one of the following via at least one of radio resource control signaling, system information, dedicated signaling, etc.: configuration of the information about the abnormal reception; information about the timer for monitoring the information about the abnormal reception; at least one ongoing multimedia broadcast multicast service in the current cell or in a service cell providing one or more multimedia broadcast multicast services; at least one quality threshold on the point-to-multipoint channel associated with the multimedia broadcast multicast service, etc.

[0044] In some embodiments, configuration of the information regarding the abnormal reception may be associated with the multimedia broadcast multicast service.

[0045] In some embodiments, the data of the multimedia broadcast multicast service on the point-to-multipoint channel may include at least one of the following: control signaling of the multimedia broadcast multicast service on the multicast control channel, service data of the multimedia broadcast multicast service on the multicast service channel, etc.

[0046] In some embodiments, the transmission of the MBMS data, the transmission of information such as configuration of the information about the abnormal reception, and the reception of the information about the abnormal reception may be associated with different serving cells.

[0047] In a fifth aspect, a method is disclosed, comprising: monitoring data of a multimedia broadcast multicast service on a point-to-multipoint channel; detecting abnormal reception of the data; and transmitting information about the abnormal reception in response to the detection. For example, the method may be performed in a user equipment.

[0048] In some embodiments, the abnormal reception of the data may include at least one of the following: failure to receive the data on the point-to-multipoint channel within a predetermined time window, or decoding error of the data received via the point-to-multipoint channel.

[0049] In some embodiments, the information about the abnormal reception may include information about at least one of the following: an indication of abnormal reception; at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service; at least one ongoing multimedia broadcast multicast service in the current cell or in a service cell providing one or more multimedia broadcast multicast services; at least one correctly received multimedia broadcast multicast service in the current cell or in the service cell providing one or more multimedia broadcast multicast services; at least one multimedia broadcast multicast service of interest in the current cell or in the service cell providing one or more multimedia broadcast multicast services, etc.

[0050] In some embodiments, the at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service may include at least one of the following: a detected signal-to-noise ratio on the point-to-multipoint channel associated with the multimedia broadcast multicast service; a detected channel quality information on the point-to-multipoint channel associated with the multimedia broadcast multicast service; a detected block error rate on the point-to-multipoint channel associated with the multimedia broadcast multicast service; a detected packet error rate on the point-to-multipoint channel associated with the multimedia broadcast multicast service, etc.

[0051] In some embodiments, the information about the abnormal reception may be transmitted via at least one of the following: radio resource control signaling, a medium access control element, a physical layer signaling, a preamble, and the like.

[0052] In some embodiments, the method may further include receiving information about at least one of the following via at least one of radio resource control signaling, system information, dedicated signaling, etc.: configuration of information about the abnormal reception; information about a timer for transmitting information about the abnormal reception; at least one ongoing multimedia broadcast multicast service in the current cell or in a service cell providing one or more multimedia broadcast multicast services; at least one quality threshold on the point-to-multipoint channel associated with the multimedia broadcast multicast service, etc.

[0053] In some embodiments, the configuration of the information about the abnormal reception may be associated with the multimedia broadcast multicast service.

[0054] In some embodiments, the data of the multimedia broadcast multicast service via the point-to-multipoint channel may include at least one of the following: control signaling of the multimedia broadcast multicast service via a multicast control channel, service data of the multimedia broadcast multicast service via a multicast service channel, etc.

[0055] In some embodiments, the reception of the data of the multimedia broadcast multicast service, the reception of the configuration of the information about the abnormal reception, etc., and the transmission of the information about the abnormal reception may be associated with different serving cells.

[0056] In a sixth aspect, a device is disclosed that can be configured to perform at least the method of the fifth aspect. The device may include at least one processor and at least one memory. The at least one memory may include computer program code, and the at least one memory and the computer program code may be configured to, together with the at least one processor, enable the device to perform point-to-multipoint channel monitoring of data of a multimedia broadcast multicast service, detection of abnormal reception of the data, and transmission of information about the abnormal reception in response to the detection. For example, the device may be at least a part of a user equipment.

[0057] In some embodiments, the abnormal reception of the data may include at least one of the following: failure to receive the data on the point-to-multipoint channel within a predetermined time window, or decoding error of the data received via the point-to-multipoint channel.

[0058] In some embodiments, the information about the abnormal reception may include information about at least one of the following: an indication of abnormal reception; at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service; at least one ongoing multimedia broadcast multicast service in the current cell or in a service cell providing one or more multimedia broadcast multicast services; at least one correctly received multimedia broadcast multicast service in the current cell or in the service cell providing one or more multimedia broadcast multicast services; at least one multimedia broadcast multicast service of interest in the current cell or in the service cell providing one or more multimedia broadcast multicast services, etc.

[0059] In some embodiments, the at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service may include at least one of the following: a detected signal-to-noise ratio on the point-to-multipoint channel associated with the multimedia broadcast multicast service; a detected channel quality information on the point-to-multipoint channel associated with the multimedia broadcast multicast service; a detected block error rate on the point-to-multipoint channel associated with the multimedia broadcast multicast service; a detected packet error rate on the point-to-multipoint channel associated with the multimedia broadcast multicast service, etc.

[0060] In some embodiments, the information about the abnormal reception may be transmitted via at least one of the following: radio resource control signaling, a medium access control element, a physical layer signaling, a preamble, and the like.

[0061] In some embodiments, the at least one memory and the computer program code can be configured to, together with the at least one processor, cause the device to further execute: receiving information about at least one of the following via at least one of radio resource control signaling, system information, dedicated signaling, etc.: configuration of the information about the abnormal reception; information about a timer for transmitting the information about the abnormal reception; at least one ongoing multimedia broadcast multicast service in the current cell or in a service cell providing one or more multimedia broadcast multicast services; at least one quality threshold on the point-to-multipoint channel associated with the multimedia broadcast multicast service, etc.

[0062] In some embodiments, configuration of the information regarding the abnormal reception may be associated with the multimedia broadcast multicast service.

[0063] In some embodiments, the data of the multimedia broadcast multicast service via the point-to-multipoint channel may include at least one of the following: control signaling of the multimedia broadcast multicast service via a multicast control channel, service data of the multimedia broadcast multicast service via a multicast service channel, etc.

[0064] In some embodiments, the reception of the data of the multimedia broadcast multicast service, the reception of the configuration of the information about the abnormal reception, etc., and the transmission of the information about the abnormal reception may be associated with different serving cells.

[0065] In a seventh aspect, a device is disclosed, which can be configured to perform at least the method of the fifth aspect. The device may include: a device for monitoring data of a multimedia broadcast multicast service on a point-to-multipoint channel; a device for detecting abnormal reception of the data; and a device for transmitting information about the abnormal reception in response to the detection. For example, the device may be at least a part of a user equipment.

[0066] In some embodiments, the abnormal reception of the data may include at least one of the following: failure to receive the data on the point-to-multipoint channel within a predetermined time window, or decoding error of the data received via the point-to-multipoint channel.

[0067] In some embodiments, the information about the abnormal reception may include information about at least one of the following: an indication of abnormal reception; at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service; at least one ongoing multimedia broadcast multicast service in the current cell or in a service cell providing one or more multimedia broadcast multicast services; at least one correctly received multimedia broadcast multicast service in the current cell or in the service cell providing one or more multimedia broadcast multicast services; at least one multimedia broadcast multicast service of interest in the current cell or in the service cell providing one or more multimedia broadcast multicast services, etc.

[0068] In some embodiments, the at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service may include at least one of the following: a detected signal-to-noise ratio on the point-to-multipoint channel associated with the multimedia broadcast multicast service, a detected channel quality information on the point-to-multipoint channel associated with the multimedia broadcast multicast service, a detected block error rate on the point-to-multipoint channel associated with the multimedia broadcast multicast service, a detected packet error rate on the point-to-multipoint channel associated with the multimedia broadcast multicast service, and the like.

[0069] In some embodiments, the information about the abnormal reception may be transmitted via at least one of the following: radio resource control signaling, a medium access control element, a physical layer signaling, a preamble, and the like.

[0070] In some embodiments, the device may further include a device for receiving at least one of the following information via at least one of radio resource control signaling, system information, dedicated signaling, etc.: configuration of information about the abnormal reception; information about a timer for transmitting information about the abnormal reception; at least one ongoing multimedia broadcast multicast service in the current cell or in a service cell providing one or more multimedia broadcast multicast services; at least one quality threshold on the point-to-multipoint channel associated with the multimedia broadcast multicast service, etc.

[0071] In some embodiments, configuration of the information regarding the abnormal reception may be associated with the multimedia broadcast multicast service.

[0072] In some embodiments, the data of the multimedia broadcast multicast service via the point-to-multipoint channel may include at least one of the following: control signaling of the multimedia broadcast multicast service via a multicast control channel, service data of the multimedia broadcast multicast service via a multicast service channel, etc.

[0073] In some embodiments, the reception of the data of the multimedia broadcast multicast service, the reception of the configuration of the information about the abnormal reception, etc., and the transmission of the information about the abnormal reception may be associated with different serving cells.

[0074] In an eighth aspect, a computer-readable medium is disclosed. The computer-readable medium may include instructions stored thereon for causing a device to perform the method in the fifth aspect. The instructions may cause the device to monitor data of a multimedia broadcast multicast service on a point-to-multipoint channel, detect abnormal reception of the data, and transmit information about the abnormal reception in response to the detection. For example, the device may be at least a part of a user device.

[0075] In some embodiments, the abnormal reception of the data may include at least one of the following: failure to receive the data on the point-to-multipoint channel within a predetermined time window, or decoding error of the data received via the point-to-multipoint channel.

[0076] In some embodiments, the information about the abnormal reception may include information about at least one of the following: an indication of abnormal reception; at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service; at least one ongoing multimedia broadcast multicast service in the current cell or in a service cell providing one or more multimedia broadcast multicast services; at least one correctly received multimedia broadcast multicast service in the current cell or in the service cell providing one or more multimedia broadcast multicast services; at least one multimedia broadcast multicast service of interest in the current cell or in the service cell providing one or more multimedia broadcast multicast services, etc.

[0077] In some embodiments, the at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service may include at least one of the following: a signal-to-noise ratio detected on the point-to-multipoint channel associated with the multimedia broadcast multicast service; channel quality information detected on the point-to-multipoint channel associated with the multimedia broadcast multicast service; a block error rate detected on the point-to-multipoint channel associated with the multimedia broadcast multicast service; a packet error rate detected on the point-to-multipoint channel associated with the multimedia broadcast multicast service, and the like.

[0078] In some embodiments, the information about the abnormal reception may be transmitted via at least one of the following: radio resource control signaling, a medium access control element, a physical layer signaling, a preamble, and the like.

[0079] In some embodiments, the instructions may cause the device to further execute: receiving information about at least one of the following via at least one of radio resource control signaling, system information, dedicated signaling, etc.: configuration of information about the abnormal reception, information about a timer for transmitting the information about the abnormal reception; at least one ongoing multimedia broadcast multicast service in the current cell or in a service cell providing one or more multimedia broadcast multicast services; at least one quality threshold on the point-to-multipoint channel associated with the multimedia broadcast multicast service, etc.

[0080] In some embodiments, configuration of the information regarding the abnormal reception may be associated with the multimedia broadcast multicast service.

[0081] In some embodiments, the data of the multimedia broadcast multicast service via the point-to-multipoint channel may include at least one of the following: control signaling of the multimedia broadcast multicast service via a multicast control channel, service data of the multimedia broadcast multicast service via a multicast service channel, etc.

[0082] In some embodiments, the reception of the data of the multimedia broadcast multicast service, the reception of the configuration of the information about the abnormal reception, etc., and the transmission of the information about the abnormal reception may be associated with different serving cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0083] Some embodiments will now be described by way of non-limiting examples with reference to the accompanying drawings.

[0084] Figure 1 An example process of dynamically configuring / adjusting MBMS transmission coverage in an embodiment is illustrated.

[0085] Figure 2 An example of information communication in the embodiment is illustrated.

[0086] Figure 3 An example of information communication in the embodiment is illustrated.

[0087] Figure 4 An example of adjustment of the coverage of MBMS transmission in an embodiment is illustrated.

[0088] Figure 5 Another example of adjustment of the coverage of MBMS transmission in the embodiments is illustrated.

[0089] Figure 6 Another example of adjustment of the coverage of MBMS transmission in the embodiments is illustrated.

[0090] Figure 7 An example method for configuring / adjusting dynamic coverage of MBMS transmissions in an embodiment is illustrated.

[0091] Figure 8 An example method for dynamically configuring / adjusting MBMS transmission coverage in an embodiment is illustrated.

[0092] Fig. 9 An example method for dynamically configuring / adjusting MBMS transmission coverage in an embodiment is illustrated.

[0093] Fig.10 An example method for dynamically configuring / adjusting MBMS transmission coverage in an embodiment is illustrated.

[0094] Fig.11 An example method for dynamically configuring / adjusting MBMS transmission coverage in an embodiment is illustrated.

[0095] Fig.12 An example apparatus for dynamically configuring / adjusting MBMS transmission coverage in an embodiment is illustrated.

[0096] Fig.13 An example device for dynamically configuring / adjusting MBMS transmission coverage in an embodiment is illustrated.

[0097] Fig.14 An example apparatus for dynamically configuring / adjusting MBMS transmission coverage in an embodiment is illustrated.

[0098] Fig.15 An example device for dynamically configuring / adjusting MBMS transmission coverage in an embodiment is illustrated. DETAILED DESCRIPTION

[0099] In the case of supporting MBMS in a telecommunication system / network (such as an LTE system and an NR system), the coverage of a point-to-multipoint (P2MP) channel (such as a multicast control channel (MCCH) and a multicast traffic channel (MTCH)) or the coverage of MBMS transmission may be statically configured to match a cell area to ensure that MBMS transmission via the P2MP channel can reach a user equipment (UE) that may be at the edge of the cell area. On the other hand, such static configuration for MBMS transmission coverage may result in a waste of transmission power and may increase interference, for example, in the case where a UE that does not receive MBMS is located at the cell edge.

[0100] Figure 1 An example process of dynamically configuring / adjusting MBMS transmission coverage in an embodiment is illustrated.

[0101] In such Figure 1 In the example shown, a base station (BS) 110 of the network may transmit MBMS data 131 on at least one P2MP channel to one or more UEs that are monitoring the MBMS data 131. For example, the at least one P2MP may include, but is not limited to, MCCH, MTCH, etc., and the MBMS data 131 transmitted by the BS 110 on the at least one P2MP channel may include, but is not limited to, control signaling of MBMS on MCCH, service data of MBMS on MTCH, etc. Then, in operation 111, the BS 110 may monitor at least one uplink channel to obtain information about the reception status of the MBMS data 131 from the one or more UEs, and may adjust the MBMS transmission or the coverage of the P2MP channel based on the monitoring result in operation 111, for example, by adjusting at least one of the transmit power of the P2MP channel or the modulation and coding strategy (MCS) level of the P2MP channel.

[0102] In cooperation with BS 110, Figure 1As shown, UE 120 expecting MBMS data from BS 110 may monitor MBMS data 131 on at least one P2MP channel in operation 121, and may further detect the reception status of MBMS data 131 in operation 122. For example, in a case where UE 120 does not receive MBMS data within a predetermined time window, or in a case where UE 120 suffers an error or abnormality when decoding received MBMS data 131, or in a case where MBMS data 131 is not expected by UE 120, etc., UE 120 may detect abnormal reception of MBMS data in operation 122, and may send information 132 on abnormal reception of MBMS data to BS 110 via an uplink channel.

[0103] In one example, the information 132 may include an indication (eg, a 1-bit indication) regarding abnormal reception of the MBMS data. Additionally or alternatively, for example, one or more additional information items may be included in the information 132 .

[0104] For example, the additional information items in the information 132 may include one or more quality detections on at least one P2MP channel associated with the MBMS, which may be detected or measured, for example, when the UE 120 detects abnormal reception of MBMS data in operation 122, or during monitoring of MBMS data in operation 121, or at other appropriate times. For example, the quality detection may include, but is not limited to, one or more of at least one detected signal-to-noise ratio (SNR) on at least one P2MP channel associated with the MBMS, at least one detected channel quality information (CQI) on at least one P2MP channel associated with the MBMS, at least one detected block error rate (BLER) on at least one P2MP channel associated with the MBMS, at least one detected packet error rate (PER) on at least one P2MP channel associated with the MBMS, and the like.

[0105] For example, the additional information items in the information 132 may also include information such as at least one ongoing MBMS in the current cell or in a service cell providing one or more multimedia broadcast multicast services, at least one correctly received MBMS in the current cell or in a service cell providing one or more multimedia broadcast multicast services, at least one interested MBMS in the current cell or in a service cell providing one or more multimedia broadcast multicast services, etc. For example, the information 132 may include at least one temporary mobile group identity (TMGI) of at least one ongoing MBMS in the current cell or in a service cell providing one or more multimedia broadcast multicast services, at least one correctly received MBMS in the current cell or in a service cell providing one or more multimedia broadcast multicast services, at least one interested MBMS in the current cell or in a service cell providing one or more multimedia broadcast multicast services, etc. For example, in the event that UE 120 may detect abnormal reception of MBMS data in operation 122, UE 120 may remove information about the MBMS associated with the MBMS data 131 in at least one correctly received MBMS in the current cell or in a service cell providing one or more multimedia broadcast multicast services, and the information 132 may include an updated list of at least one correctly received MBMS in the current cell or in a service cell providing one or more multimedia broadcast multicast services.

[0106] In various examples, the information 132 about abnormal reception of MBMS data may be encapsulated and transmitted by radio resource control (RRC) signaling, a medium access control (MAC) control element (CE), a physical layer signaling, etc. For example, when the UE 120 is in an idle state (e.g., RRC_IDLE state) or an inactive state (e.g., RRC_INACTIVE state), the UE 120 may request an RRC connection and may encapsulate the information 132 about abnormal reception of MBMS data in a message 3 (or msg3) of a random access (RA) procedure or a message A (or msgA) of a 2-step RA procedure, etc., by which signaling overhead may be reduced. In another example, a preamble may be configured for the information 132 about abnormal reception of MBMS data, and the UE 120 may transmit the preamble to the BS 110 when abnormal reception of MBMS data in operation 122 is detected.

[0107] like Figure 1 As shown, when BS 110 receives or detects information 132 about abnormal reception of MBMS data from UE 120, BS 110 may expand the coverage of the P2MP channel or MBMS transmission in operation 112, for example, by increasing the transmit power of the P2MP channel and / or reducing the MCS level of the P2MP channel.

[0108] For example, in response to receiving information 132 or detecting an abnormal reception indication of MBMS data based on information 132, BS 110 may determine the reception status of MBMS data 131 as abnormal reception, and may perform operation 112 to increase the transmission power of the P2MP channel to a predetermined degree and / or reduce the MCS level of the P2MP channel by a predetermined number of levels.

[0109] In another example, the BS 110 may perform finer adjustments to the coverage of the MBMS transmission based on one or more additional information items in the information 132. For example, when receiving the information 132, the BS 110 may determine an adjustment amount of the transmit power of the P2MP channel and / or the MCS level of the P2MP channel, which MBMS to perform the adjustment on, etc., based on one or more information items in the information 132, such as one or more quality detections, at least one ongoing MBMS in the current cell or in a service cell providing one or more multimedia broadcast multicast services, at least one correctly received MBMS in the current cell or in a service cell providing one or more multimedia broadcast multicast services, at least one MBMS of interest in the current cell or in a service cell providing one or more multimedia broadcast multicast services, etc. Then, the BS 110 may increase the transmit power of the P2MP channel and / or decrease the MCS level of the P2MP channel based on the determined adjustment amount of the P2MP associated with the determined MBMS. For example, BS 110 can determine one or more services, which belong to at least one ongoing MBMS in the current cell (or a service cell providing one or more multimedia broadcast multicast services), or at least one MBMS of interest in the current cell (or a service cell providing one or more multimedia broadcast multicast services), but not in at least one correctly received MBMS in the current cell (or a service cell providing one or more multimedia broadcast multicast services); and increase the transmission power of the P2MP channel associated with the determined one or more services and / or reduce the MCS level of the P2MP channel related to the determined one or more services; and can retransmit the MBMS data 131 associated with the determined one or more services.

[0110] For the operation 111 of monitoring the information 132 about abnormal information of MBMS data, a timer may be configured in the BS 110 to provide a monitoring time window 115 for the BS 110. For example, the timer may be started or restarted in the BS 110 in response to the transmission of the MBMS data 131 or in parallel with the operation 111 of monitoring the reception status information, and may be stopped in response to detecting or receiving the information 132 about abnormal reception of MBMS data from one or more UEs.

[0111] Therefore, in the case that BS 110 receives information 132 about abnormal reception of MBMS data before the timer configured in BS 110 for providing monitoring time window 115 for BS 110 expires, BS 110 may perform operation 112 to expand the coverage of MBMS transmission. Then, BS 110 may retransmit MBMS data 131 on at least one P2MP channel with increased transmission power and / or reduced MCS level, and may perform operation 111 again to monitor information about the reception status of MBMS data 131, wherein, for example, the timer configured in BS 110 for providing monitoring time window 115 for BS 110 may be restarted in response to retransmitting MBMS data 131 or in parallel with operation 111.

[0112] In the case that the BS 110 does not receive the information 132 about the abnormal reception of MBMS data within the monitoring time window 115, for example, the BS 110 may keep the coverage of the P2MP channel for transmitting MBMS data (eg, the MBMS data 131) unchanged.

[0113] In another example, when the BS 110 does not receive the information 132 about the abnormal reception of MBMS data within the monitoring time window 115, as shown in FIG. Figure 1 As shown, the BS 110 may reduce the coverage of the P2MP channel or MBMS transmission, for example, by reducing the transmit power of the P2MP channel and / or increasing the MCS level of the P2MP channel in operation 114. For example, if the information 132 about abnormal reception of the MBMS is not received before the timer configured in the BS 110 for providing the BS 110 with the monitoring time window 115 expires, the BS 110 may determine that the MBMS 131 has been successfully or normally received by one or more UEs, and may perform operation 114 to reduce the transmit power of the P2MP channel by a predetermined degree and / or increase the MCS level of the P2MP channel by a predetermined number of levels.

[0114] In addition, if Figure 1 As shown, when UE 120 detects that MBMS data 131 in operation 122 is successfully received, for example, when UE 120 receives expected MBMS data 131 within a predetermined time window and successfully decodes the received MBMS data 131, UE 120 may also send information 133 about normal / successful reception of MBMS data 131 to BS 110.

[0115] In one example, the information 133 may include an indication (eg, a 1-bit indication) regarding normal reception of the MBMS data 131. Additionally or alternatively, for example, one or more additional information items may be included in the information 133.

[0116] For example, the additional information items in the information 133 may include one or more quality detections on at least one P2MP channel associated with the MBMS, which may be detected or measured, for example, when the UE 120 detects that the MBMS data 131 in operation 122 is successfully or normally received, or during a period of monitoring the MBMS data in operation 121, or at other appropriate times. For example, the quality detection may include, but is not limited to, one or more of at least one detected SNR on at least one P2MP channel associated with the MBMS, at least one detected CQI on at least one P2MP channel associated with the MBMS, at least one detected BLER on at least one P2MP channel associated with the MBMS, at least one detected PER on at least one P2MP channel associated with the MBMS, and the like.

[0117] For example, the additional information items in the information 133 may also include, for example, information about at least one ongoing MBMS in the current cell or in a service cell providing one or more multimedia broadcast multicast services, at least one correctly received MBMS in the current cell or in a service cell providing one or more multimedia broadcast multicast services, at least one interested MBMS in the current cell or in a service cell providing one or more multimedia broadcast multicast services, etc. For example, the information 133 may include at least one temporary mobile group identity in at least one ongoing MBMS in the current cell or in a service cell providing one or more multimedia broadcast multicast services, at least one correctly received MBMS in the current cell or in a service cell providing one or more multimedia broadcast multicast services, at least one interested MBMS in the current cell or in a service cell providing one or more multimedia broadcast multicast services, etc. For example, in the case that the UE 120 may detect successful or normal reception of MBMS data in operation 122, the UE 120 may add information about the MBMS associated with the MBMS data 131 in at least one correctly received MBMS in the current cell, and the information 132 may include an updated list of at least one correctly received MBMS in the current cell.

[0118] In various examples, the information 133 on the normal reception of the MBMS data 131 may be encapsulated and transmitted by RRC signaling, MACCE, physical layer signaling, etc. For example, when the UE 120 is in an idle state (e.g., RRC_IDLE state) or an inactive state (e.g., RRC_INACTIVE state), the UE 120 may request an RRC connection, and the information 133 on the normal reception of the MBMS data 131 may be encapsulated in message 3 (or msg3) of the RA procedure or message A (or msgA) of the 2-step RA procedure, etc., through which the signaling overhead may be reduced. In another example, a preamble may be configured for the information 133 on the successful / normal reception of the MBMS data 131, and the UE 120 may send the preamble to the BS 110 when the successful / normal reception of the MBMS data 131 is detected in operation 122.

[0119] In one example, in response to receiving the information 133 within the monitoring time window 115, the BS 110 may retain the information 133 without adjusting the coverage of the MBMS transmission, and may utilize the information 133 in operation 114 performed later in response to the end of the monitoring time window 115. For example, in operation 114, the BS 110 may determine, based on the information 133, an adjustment amount for the transmit power and / or MCS level of the P2MP channels associated with one or more correctly received services.

[0120] In another example, if Figure 1 As shown, in response to receiving information 133 within monitoring time window 115, BS 110 may perform operation 113 to reduce the coverage of MBMS transmission associated with one or more services based on information 133 by reducing the transmit power or modulation of the P2MP channel and / or increasing the MCS level of the P2MP channel. For example, in operation 113, BS 110 may determine an adjustment amount of the transmit power and / or MCS level of the P2MP channel associated with one or more correctly received services based on information 133. In this example, in response to the end of monitoring time window 115, operation 114 may be performed or ignored.

[0121] In another example, BS 110 may ignore information 133 from UE 110. In another example, BS 110 may perform operation 114 in response to receiving information 133 after monitoring time window 115 ends.

[0122] In some examples, after adjusting the coverage of the MBMS transmission (e.g., operations 112, 113, or 114), the MBMS 131 may be retransmitted, and the operation 111 of monitoring information about the reception status of the MBMS 131 from one or more UEs may be re-performed again. For example, a timer configured in the BS 110 for monitoring may be restarted.

[0123] In addition, if Figure 1 As shown, in some examples, BS 110 may also transmit information 134 to one or more UEs.

[0124] In one example, the information 134 may include one or more configurations of the information 132 regarding abnormal reception and / or the information 133 regarding normal reception. For example, the configuration on the information 132 and / or 133 may specify the content included in the information 132 and / or 133 (e.g., one or more qualities to be detected), and different configurations on the information 132 and / or 133 may be associated with different multimedia broadcast multicast services. For example, the information 134 may include: a configuration on the information 132 associated with the first MBMS, the configuration specifying that the information 132 associated with the first MBMS includes the BLER detected on the P2MP channel associated with the first MBMS; and another configuration on the information 132 associated with the second MBMS, the configuration specifying that the information 132 associated with the second MBMS does not include information about quality detection. Based on the information 134, when the UE 120 detects abnormal reception of the MBMS data of the first MBMS, the UE 120 may detect the BLER on the P2MP channel associated with the first MBMS, and may include the BLER detected on the P2MP channel associated with the first MBMS in the information 132. When UE 120 detects abnormal reception of MBMS data of the second MBMS, UE 120 may transmit information 132 indicating abnormal reception of MBMS data of the second MBMS without quality detection. Therefore, information 132 / 133 reported from UE to BS 110 may be flexibly configured.

[0125] Additionally or alternatively, the information 134 may also include information about a timer in the BS 110 for monitoring information about the reception status. For example, the UE 120 may configure or determine a time window for operation 121 for monitoring the MBMS data 131 based on the information about the timer in the BS 110. For example, the UE 120 may configure the timer window for monitoring the MBMS data 131 to match the monitoring time window 115 for the BS 110, so that the UE 120 may notify the BS 110 of the information 132 / 133 in a timely manner.

[0126] Additionally or alternatively, the information 134 may also include information about one or more quality thresholds on at least one P2MP channel associated with the MBMS, such as a BLER threshold on a P2MP channel associated with the first MBMS, a PER threshold on a P2MP channel associated with the first MBMS, a BLER threshold on a P2MP channel associated with the second MBMS, a PER threshold on a P2MP channel associated with the second MBMS, etc. The UE 120 may then utilize such one or more quality thresholds to evaluate the reception status of the MBMS data and / or the reception quality of the MBMS data. For example, the UE 120 may detect the quality of the P2MP channel associated with the MBMS, for example, before or during operation 121, and in the event that the detected quality is lower than the threshold indicated in the information 134, the UE 120 may determine abnormal reception of the MBMS data, such as the absence of actual reception of the MBMS data 131, in operation 122.

[0127] Additionally or alternatively, the information 134 may also include information about one or more of at least one ongoing MBMS in the current cell or in a service cell providing one or more multimedia broadcast multicast services, at least one correctly received MBMS in the current cell or in a service cell providing one or more multimedia broadcast multicast services, at least one interested MBMS in the current cell or in a service cell providing one or more multimedia broadcast multicast services, etc. For example, the information 134 may include at least one TMGI in at least one ongoing MBMS in the current cell or in a service cell providing one or more multimedia broadcast multicast services, at least one correctly received MBMS in the current cell or in a service cell providing one or more multimedia broadcast multicast services, at least one interested MBMS in the current cell or in a service cell providing one or more multimedia broadcast multicast services, etc. Then, for example, in the case where the UE 120 detects that the received MBMS data 131 is not associated with the registered TMGI of the MBMS that the UE 120 is interested in, the UE 120 may determine abnormal reception of the MBMS data in operation 122.

[0128] In various examples, the information 134 may be transmitted via at least one of RRC signaling, system information, dedicated signaling, etc. For example, Figure 2 As shown, system information block 15 (SI15) may be extended to carry information 134. In another example, in the case of single-cell point-to-multipoint (SC-PTM) service / transmission, system information block 20 (SI20) may be extended to carry information 134. In another example, information 134 may be transmitted using one or more other system information blocks (SIBs) or new SIBs.

[0129] Furthermore, in some examples, the transmission of MBMS data 131 and information 132 / 133 / 134 may be associated with substantially the same serving cell or different serving cells. Figure 3 As shown, BS 110 may transmit MBMS data 131 in secondary cell (SCell) 301 and receive information 132 about abnormal reception in special cell (sPCell) 302. Accordingly, UE 120 may receive MBMS data 131 in SCell 301 and transmit information 132 about abnormal reception in sPCell 302.

[0130] Figure 4 The diagram shows the Figure 1 The example process shown in FIG. 1 is an example of adjusting the coverage of MBMS transmission. Figure 4 In the example shown, UE 120 is outside of a coverage range 401 for MBMS transmission, and BS 110 transmits MBMS data 131 within the coverage range 401. Then, UE 120 may transmit information 132 about abnormal reception of MBMS data to BS 110, for example, due to not receiving MBMS data 131 within a predetermined time window. In response to receiving information 132 about abnormal reception of MBMS data from UE 120, BS 110 may improve the transmit power of the P2MP channel and / or reduce the MCS level of the P2MP channel, so that the coverage range 401 may be expanded to at least a new range 402 covering UE 120. Therefore, the new transmission of MBMS data 131 may be received by UE 120.

[0131] Figure 5 The diagram shows the Figure 1 The example process shown is another example of adjusting the coverage of MBMS transmission. Figure 5 In the example shown, UE 120 is located within the coverage area 501 of MBMS transmission and can successfully receive MBMS data 131 from BS 110. Then, if BS 110 does not receive information 132 about abnormal reception of MBMS data, for example, within a predetermined time window 115, BS 110 can Figure 1 Operation 114 is shown as reducing the transmission power of the P2MP channel and / or improving the MCS level of the P2MP channel so that the coverage range 501 can be reduced to a new range 502 .

[0132] In addition, if Figure 5 As shown, UE 120 may fall outside of new range 502 and, due to the reduced coverage in previous operation 114, may be unable to receive MBMS data from BS 110. Then, similar to Figure 4The illustrated process may be repeated, wherein UE 120 may send information 132 about abnormal reception of MBMS data to BS 110 , and BS 110 may perform operation 112 again to expand the coverage of the P2MP channel from range 502 .

[0133] In one example, based on the adjustment (reduction amount) in operation 114 , the coverage range of the MBMS transmission may be expanded in operation 112 , and range 502 may be expanded back to range 501 .

[0134] In another example, based on one or more previous adjustments and / or one or more previous coverage ranges, the coverage range of the MBMS transmission may be expanded in operation 112. For example, a new transmit power and / or a new MCS level may be determined based on the transmit powers corresponding to the ranges 501 and 502 and / or the MCS levels corresponding to the ranges 501 and 502, so that the new range 503 may be between the ranges 501 and 502 and may cover the UE 120.

[0135] In another example, based on additional information items in information 132, such as one or more detected qualities on a P2MP channel associated with MBMS, the coverage range of MBMS transmission may be expanded in operation 112, so that a finer and more accurate expansion from range 502 to range 503 may be achieved.

[0136] Figure 6 The diagram shows the Figure 1 The example process shown is another example of coverage adjustment for MBMS transmission. Figure 6 In the example shown, UE 120 is located within the coverage range 601 of MBMS transmission and can successfully receive MBMS data 131 from BS 110. Then, UE 120 can send information 133 about normal / successful reception of MBMS 131 to BS 110. For example, information 133 can include information about one or more detected qualities, a list of correctly received services, etc. Then, based on information 133, BS 110 can perform operation 113 or 114 to reduce the transmit power of the P2MP channel and / or improve the MCS level of the P2MP channel, so that the coverage range 601 can be effectively reduced to a new range 602 that also covers UE 120.

[0137] In one or more of the above examples, Figure 1 The example process shown, for example, based on feedback from one or more UEs, a BS or network can dynamically configure or adjust the coverage of MBMS transmissions so that waste of transmission power can be reduced or avoided.

[0138] It can be understood that the present application is not limited to the above examples, and one or more modifications and / or changes may be made based on the above examples.

[0139] Figure 7 An example method 700 for configuring / adjusting dynamic coverage of MBMS transmissions in an embodiment is illustrated, which may be performed, for example, in BS 110 .

[0140] like Figure 7 As shown, in operation 701, BS 110 may transmit MBMS data (e.g., MBMS data 131) on a P2MP channel. For example, in operation 701, the MBMS data on the P2MP channel may include at least one of control signaling of MBMS on MCCH, service data of MBMS on MTCH, etc. In operation 702, BS 110 may monitor information (e.g., information 132) about abnormal data reception on an uplink channel. In operation 703, BS 110 may adjust the coverage of the P2MP channel based on the monitoring in operation 702.

[0141] In another embodiment, if Figure 8 As shown in , the example method 700 may further include operation 801. In operation 801, the BS 110 may, for example, in response to operation 701, start a timer for operation 702 (e.g., a timer for providing the monitoring time window 115). Then, in the case where information about abnormal reception of MBMS data (e.g., information 132) is detected based on operation 702, for example, before the timer expires, the BS 110 may perform operation 802 to stop the timer. In addition, in operation 703, the BS 110 may, for example, based on the information about abnormal reception of MBMS data detected in operation 702 before operation 802, perform sub-operation 803 to expand the coverage of the P2MP channel.

[0142] In addition, the same Figure 8 As shown, in the exemplary method 700, in the case where the information about the abnormal reception of MBMS data is not detected in operation 702, the BS 110 may check whether the timer started in operation 801 has expired 804. If the timer has expired, in operation 703, the BS 110 may perform a sub-operation 805 to reduce the coverage of the P2MP channel. If the timer has not expired, the BS 110 may continue to monitor the information about the abnormal reception of MBMS data in operation 702.

[0143] For example, the coverage of the P2MP channel may be expanded by at least one of reducing the transmit power of the P2MP channel or improving the MCS level of the P2MP channel. For example, the coverage of the P2MP channel may be reduced by at least one of improving the transmit power of the P2MP channel or reducing the MCS level of the P2MP channel.

[0144] In some embodiments, the information about abnormal reception monitored or received in operation 702 may include information about one or more of the following: an indication of abnormal reception; at least one quality detection on a P2MP channel associated with an MBMS; at least one ongoing MBMS in a current cell or in a serving cell providing one or more multimedia broadcast multicast services; at least one correctly received MBMS in a current cell or in a serving cell providing one or more multimedia broadcast multicast services; at least one MBMS of interest in a current cell or in a serving cell providing one or more multimedia broadcast multicast services; etc. For example, the at least one quality detection on a P2MP channel associated with an MBMS may include one or more of the following: a detected SNR on a P2MP channel associated with an MBMS; a detected CQI on a P2MP channel associated with an MBMS; a detected BLER on a P2MP channel associated with an MBMS; a detected PER on a P2MP channel associated with an MBMS; etc.

[0145] In some embodiments, the information about abnormal reception monitored in operation 702 may be received via one or more of RRC signaling, MACCE, physical signaling, preamble, and the like.

[0146] In addition, if Fig. 9 As shown, in some embodiments, the example method 700 may further include an operation 901 of transmitting information (e.g., information 134) about at least one of the following: configuration of information about abnormal reception, information about a timer for monitoring information about abnormal reception, at least one ongoing MBMS in a current cell or in a serving cell providing one or more multimedia broadcast multicast services, at least one quality threshold on a P2MP channel associated with the MBMS, etc. For example, such information transmitted in operation 901 may be transmitted via at least one of RRC signaling, system information (e.g., SI15, SI20), dedicated signaling, etc. For example, different configurations of information about abnormal reception may be associated with different multimedia broadcast multicast services.

[0147] In some embodiments, the transmission of MBMS data in operation 701 and the reception of information about abnormal reception in operation 702 may be associated with different serving cells. For example, the transmission of MBMS data in operation 701 may be associated with a secondary cell, and the reception of information about abnormal reception in operation 702 may be associated with a special cell. In addition, the transmission of MBMS data in operation 701, the transmission in operation 901, and the reception of information about abnormal reception in operation 702 may be associated with different serving cells.

[0148] In conjunction with the example method 700 in the BS 110, Fig.10 An example method 1000 for configuring / adjusting dynamic coverage of MBMS transmissions in an embodiment is illustrated, which may be performed, for example, in UE 120 .

[0149] like Fig.10 As shown, in operation 1001, UE 120 may monitor data (e.g., MBMS data 131) of an MBMS on a P2MP channel. Then, in operation 1002, UE 120 may detect abnormal reception of data. For example, in the case where data reception on a P2MP channel fails within a predetermined time window, or in the case of a decoding error of data received via a P2MP channel, etc., UE 120 may detect abnormal reception of MBMS data. Then, in operation 1003, UE 120 may send information (e.g., information 132) about abnormal reception in response to the detection in operation 1002.

[0150] In some embodiments, the information about abnormal reception transmitted in operation 1003 may include information about one or more of the following: an indication of abnormal reception; at least one quality detection on a P2MP channel associated with the MBMS; at least one ongoing MBMS in the current cell or in a serving cell providing one or more multimedia broadcast multicast services; at least one correctly received MBMS in the current cell or in a serving cell providing one or more multimedia broadcast multicast services; at least one MBMS of interest in the current cell or in a serving cell providing one or more multimedia broadcast multicast services; etc. For example, the at least one quality detection on the P2MP channel associated with the MBMS may include one or more of the following: a detected SNR on a P2MP channel associated with the MBMS; a detected CQI on a P2MP channel associated with the MBMS; a detected BLER on a P2MP channel associated with the MBMS; a detected PER on a P2MP channel associated with the MBMS; etc. For example, the information about abnormal reception may be transmitted via one or more of RRC signaling, MAC CE, physical signaling, preamble, etc.

[0151] Furthermore, if Fig.11 As shown, in some embodiments, the example method 1000 may further include an operation 1101 of receiving information (e.g., information 134) about at least one of the following: configuration of information about abnormal reception, information about a timer for monitoring information about abnormal reception, at least one ongoing MBMS in a current cell or in a serving cell providing one or more multimedia broadcast multicast services, at least one quality threshold on a P2MP channel associated with the MBMS, etc. For example, such information received in operation 1101 may be via at least one of RRC signaling, system information (e.g., SI15, SI20), dedicated signaling, etc. For example, different configurations of information about abnormal reception may be associated with different multimedia broadcast multicast services.

[0152] In some embodiments, the reception of MBMS data in operation 1001 and the transmission of information about abnormal reception in operation 1003 may be associated with different serving cells. For example, the transmission of MBMS data in operation 701 may be associated with a special cell, and the reception of information about abnormal reception in operation 702 may be associated with a secondary cell. In addition, the reception of MBMS data in operation 1001, the reception in operation 1101, and the transmission of information about abnormal reception in operation 1003 may be associated with different serving cells.

[0153] Fig.12 An example apparatus 1200 is illustrated, which may be at least a portion of the BS 110, for configuring / adjusting dynamic coverage of MBMS transmissions in an embodiment.

[0154] like Fig.12 As shown, the example apparatus 1200 may include at least one processor 1201 and at least one memory 1202 that may include computer program code 1203. The at least one memory 1202 and the computer program code 1203 may be configured to, together with the at least one processor 1201, cause the apparatus 1200 to at least perform the operations of the example method 700 described above.

[0155] In various embodiments, at least one processor 1201 in the example device 1200 may include, but is not limited to, at least one hardware processor, including at least one microprocessor such as a central processing unit (CPU), a portion of at least one hardware processor, and any other suitable dedicated processor such as those developed based on, for example, a field programmable gate array (FPGA) and an application specific integrated circuit (ASIC). In addition, the at least one processor 1201 may also include Fig.12 At least one other circuit or element not shown.

[0156] In various embodiments, at least one memory 1202 in the example apparatus 1200 may include various forms of at least one storage medium such as volatile memory and / or non-volatile memory. Volatile memory may include, but is not limited to, for example, random access memory (RAM), cache, etc. Non-volatile memory may include, but is not limited to, for example, read-only memory (ROM), hard disk, flash memory, etc. In addition, at least the memory 1202 may include, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or equipment, or any combination of the above.

[0157] In addition, in various embodiments, exemplary apparatus 1200 may further include at least one other circuit, element, and interface, such as at least one I / O interface, at least one antenna element, and the like.

[0158] In various embodiments, the circuits, components, elements, and interfaces in the exemplary device 1200 including at least one processor 1201 and at least one memory 1202 can be coupled together in any suitable manner (e.g., electrically, magnetically, optically, electromagnetically, etc.) via any suitable connection (including but not limited to buses, switch structures (crossbars), wiring and / or wireless lines).

[0159] Fig.13 An example apparatus 1300 is illustrated, which may be at least a portion of the BS 110, for example, for configuring / adjusting dynamic coverage of MBMS transmissions in an embodiment.

[0160] like Fig.13 As shown, the example device 1300 may include means for performing the operations of the above-described example method 700 in various embodiments. For example, the device 1300 may include: means 1301 for performing operation 701 of the example method 700, means 1302 for performing operation 702 of the example method 700, and means 1303 for performing operation 703 of the example method 700. In one or more further embodiments, at least one I / O interface, at least one antenna element, etc. may also be included in the example device 1300. In one or more further embodiments, the example device 1300 may further include one or more means for performing one or more additional operations in the example method 700, such as one or more means for performing operations 801, 802, 803, 804, 805, and 901 of the example method 700.

[0161] In some embodiments, examples of means in device 1300 may include circuits. For example, examples of means 1301 may include circuits configured to perform operation 701 of example method 700, examples of means 1302 may include circuits configured to perform operation 702 of example method 700, and examples of means 1303 may include circuits configured to perform operation 703 of example method 700. In some embodiments, examples of means may also include software modules and any other suitable functional entities.

[0162] The term "circuitry" throughout this application may refer to one or more or all of the following: (a) a hardware-only implementation of a circuit (such as an implementation in analog and / or digital circuits only); (b) a combination of hardware circuitry and software, such as (where applicable); (i) a combination of analog and / or digital hardware circuitry and software / firmware; and (ii) a hardware processor and any portion of software (including a digital signal processor), software, and memory that work together to enable a device such as a mobile phone or server to perform various functions); and (c) a hardware circuit and / or processor that requires software (e.g., firmware) to operate, such as a microprocessor or a portion of a microprocessor, but the software may not be present when not required to operate. This definition of circuitry applies to one or all uses of the term in this application (including in any claims). As a further example, as used in this application, the term "circuitry" also covers an implementation of a hardware circuit or processor (or multiple processors) or a portion of a hardware circuit or processor and its (or their) accompanying software and / or firmware. For example, and where applicable to a claim element, the term circuitry also covers a baseband integrated circuit or a processor integrated circuit for a mobile device, or a similar integrated circuit in a server, cellular network device, or other computing or networking device.

[0163] Fig.14 An example apparatus 1400, which may be, for example, at least a portion of a UE 120, is illustrated for configuring / adjusting dynamic coverage of MBMS transmissions in an embodiment.

[0164] like Fig.14 As shown, the example apparatus 1400 may include at least one processor 1401 and at least one memory 1402 that may include computer program code 1403. The at least one memory 1402 and the computer program code 1403 may be configured to, together with the at least one processor 1401, cause the apparatus 1400 to at least perform the operations of the example method 1000 described above.

[0165] In various embodiments, at least one processor 1401 in the example device 1400 may include, but is not limited to, at least one hardware processor, including at least one microprocessor such as a CPU, a portion of at least one hardware processor, and any other suitable dedicated processor such as those developed based on, for example, FPGAs and ASICs. In addition, at least one processor 1401 may also include Fig.14 At least one other circuit or element not shown.

[0166] In various embodiments, at least one memory 1402 in the example device 1400 may include various forms of at least one storage medium such as volatile memory and / or non-volatile memory. Volatile memory may include, but is not limited to, for example, RAM, cache, etc. Non-volatile memory may include, but is not limited to, for example, ROM, hard disk, flash memory, etc. In addition, at least the memory 1402 may include, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or equipment, or any combination of the above.

[0167] Additionally, in various embodiments, exemplary device 1400 may further include at least one other circuit, element, and interface, such as at least one I / O interface, at least one antenna element, and the like.

[0168] In various embodiments, the circuits, components, elements, and interfaces in the example device 1400 including at least one processor 1401 and at least one memory 1402 can be coupled together in any suitable manner (e.g., electrically, magnetically, optically, electromagnetically, etc.) via any suitable connection (including but not limited to buses, switching structures, wiring and / or wireless lines).

[0169] Fig.15 An example apparatus 1500, which may be at least a portion of a UE 120, for configuring / adjusting dynamic coverage of MBMS transmissions in an embodiment is illustrated.

[0170] like Fig.15As shown, the example device 1500 may include means for performing the operations of the above-described example method 1000 in various embodiments. For example, the device 1500 may include: means 1301 for performing operation 1001 of the example method 1000, means 1502 for performing operation 1002 of the example method 1000, and means 1503 for performing operation 1003 of the example method 1000. In one or more other embodiments, at least one I / O interface, at least one antenna element, etc. may also be included in the example device 1500. In one or more other embodiments, the example device 1500 may further include one or more means for performing one or more additional operations in the example method 1000, such as one or more means for performing operation 1101 of the example method 1000.

[0171] In some embodiments, examples of means in device 1500 may include circuits. For example, examples of means 1501 may include circuits configured to perform operation 1001 of example method 1000, examples of means 1502 may include circuits configured to perform operation 1002 of example method 1000, and examples of means 1503 may include circuits configured to perform operation 1003 of example method 1000. In some embodiments, examples of means may also include software modules and any other suitable functional entities.

[0172] Another example embodiment may be related to computer program code or instructions that cause a device to perform at least the above-described corresponding methods. Another example embodiment may be related to a computer-readable medium having such computer program code or instructions stored thereon. In some embodiments, such computer-readable medium may include at least one storage medium in various forms such as volatile memory and / or non-volatile memory. Volatile memory may include, but is not limited to, for example, RAM, cache, etc. Non-volatile memory may also include, but is not limited to, ROM, hard disk, flash memory, etc. Non-volatile memory may also include, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or equipment or any combination of the above.

[0173] Unless the context clearly specifically requires otherwise, throughout the specification and claims, the words "include", "comprises", etc. should be interpreted in an inclusive sense, rather than exclusive or exhaustive; that is, in the sense of "including but not limited to". As generally used herein, the term "coupled" refers to two or more elements that can be directly connected, or connected through one or more intermediate elements. Similarly, as generally used herein, the term "connected" refers to two or more elements that can be directly connected or connected through one or more intermediate elements. In addition, when used in this application, the words "herein", "above", "below" and words of similar meanings should refer to this application as a whole, rather than to any particular part of this application. Where the context permits, words used in the description in the singular or plural may also include the plural or singular, respectively. The word "or" refers to a list of two or more items, and the word covers all the following interpretations of the word: all items in the list, any item in the list, and any combination of items in the list.

[0174] Furthermore, conditional language used herein, such as "may," "could," "might," "can," "for example," "example," "such as," and the like, unless otherwise specifically stated or otherwise understood in the context of use, is generally intended to convey that some embodiments include and other embodiments do not include certain features, elements, and / or states. Thus, such conditional language is generally not intended to indicate that features, elements, and / or states are in any way required for one or more embodiments, or that one or more embodiments necessarily include logic for determining that such features, elements, and / or states are included or to be performed in any particular example embodiment, with or without author input or prompting.

[0175] Although some embodiments have been described, these embodiments have been given by way of example and are not intended to limit the scope of the present disclosure. In fact, the apparatus (equipment), method and system described herein can be embodied in a variety of other forms. In addition, without departing from the spirit of the present disclosure, various omissions, replacements and changes can be made to the form of the methods and systems described herein. For example, although the frame is presented in a given arrangement, an alternative embodiment can perform similar functions with different components and / or circuit topologies, and some frames can be deleted, moved, added, subdivided, combined and / or modified. At least one of these frames can be implemented in various different ways. The order of these frames can also be changed. Any appropriate combination of the elements and actions of some of the above-mentioned embodiments can be combined to provide other embodiments. The attached claims and their equivalents are intended to cover these forms or modifications that will fall within the scope and spirit of the application.

Claims

1. A method (1000) for communication, comprising: Monitoring (1001) data of multimedia broadcast multicast services on a point-to-multipoint channel; detecting (1002) abnormal reception of said data; as well as In response to the detecting, transmitting (1003) information regarding the abnormal reception; The abnormal reception of the data includes at least one of the following: failure to receive the data on the point-to-multipoint channel within a predetermined time window, or decoding error of the data received via the point-to-multipoint channel; The method further comprises: Receiving (1101) information about at least one of the following via at least one of radio resource control signaling, system information, or dedicated signaling: configuration of information about the abnormal reception; information about a timer for transmitting the information about the abnormal reception; at least one ongoing multimedia broadcast multicast service in a current cell or in a cell service providing one or more multimedia broadcast multicast services; or at least one quality threshold on the point-to-multipoint channel associated with the multimedia broadcast multicast service; wherein the predetermined time window for monitoring (1001) the data of the multimedia broadcast multicast service is configured based on the information of the timer; and evaluating a reception status and / or a reception quality of data of the multimedia broadcast multicast service based on the at least one quality threshold; The information about the abnormal reception includes an indication about the abnormal reception and one or more of the following additional information: at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service; at least one temporary mobile group identity TMGI of at least one ongoing multimedia broadcast multicast service in a current cell or in a serving cell providing one or more multimedia broadcast multicast services; a correctly received multimedia broadcast multicast service in at least one of the current cell and the serving cell; or at least one multimedia broadcast multicast service of interest in the current cell or the serving cell; The method further comprises: In the event of abnormal reception of the data being detected, information about the multimedia broadcast multicast service associated with the data is removed from the at least one correctly received multimedia broadcast multicast service in the current cell or in the serving cell, and the additional information also includes an updated list of at least one correctly received multimedia broadcast multicast service in the current cell or in the serving cell.

2. The method (1000) according to claim 1, wherein: The at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service comprises at least one of: a detected signal-to-noise ratio on the point-to-multipoint channel associated with the multimedia broadcast multicast service; Channel quality information detected on the point-to-multipoint channel associated with the multimedia broadcast multicast service; a block error rate detected on the point-to-multipoint channel associated with the multimedia broadcast multicast service; or a packet error rate detected on the point-to-multipoint channel associated with the multimedia broadcast multicast service.

3. The method (1000) according to claim 1 or 2, wherein: The information about the abnormal reception is transmitted via at least one of radio resource control signaling, a medium access control element, a physical layer signaling, or a preamble.

4. The method (1000) according to claim 1, wherein: The configuration of the information about the abnormal reception is associated with the multimedia broadcast multicast service.

5. The method (1000) according to claim 1, 2 or 4, wherein: The data of the multimedia broadcast multicast service via the point-to-multipoint channel includes at least one of control signaling of the multimedia broadcast multicast service via a multicast control channel or service data of the multimedia broadcast multicast service via a multicast traffic channel.

6. The method (1000) according to claim 1, 2 or 4, wherein: The reception of the data of the multimedia broadcast multicast service and the transmission of the information about the abnormal reception are associated with different serving cells.

7. A method for communication (700), comprising: Transmitting (701) data of a multimedia broadcast multicast service over a point-to-multipoint channel; Monitoring (702) information about abnormal reception of the data on an uplink channel; as well as adjusting (703) coverage of the point-to-multipoint channel based on the monitoring; In response to transmission of data of the multimedia broadcast multicast service on the point-to-multipoint channel, starting (801) a timer; and In response to receiving the information about the abnormal reception on the uplink channel before expiration of the timer, stopping (802) the timer; wherein the coverage of the point-to-multipoint channel is reduced in response to the expiration of the timer, and / or the coverage of the point-to-multipoint channel is expanded based on the information about the abnormal reception received before stopping the timer; The method further comprises: Transmitting (901) information about at least one of the following via at least one of radio resource control signaling, system information, or dedicated signaling: configuration of the information about the abnormal reception; information about the timer for monitoring the information about the abnormal reception; at least one ongoing multimedia broadcast multicast service in a current cell or in a service cell providing one or more multimedia broadcast multicast services; or at least one quality threshold on the point-to-multipoint channel associated with the multimedia broadcast multicast service; The information about the abnormal reception includes an indication about the abnormal reception and one or more of the following additional information: at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service; at least one temporary mobile group identity TMGI of at least one ongoing multimedia broadcast multicast service in a current cell or in a serving cell providing one or more multimedia broadcast multicast services; a correctly received multimedia broadcast multicast service in at least one of the current cell and the serving cell; or at least one multimedia broadcast multicast service of interest in the current cell or the serving cell; The method further comprises: Based on the one or more additional information, the coverage of the point-to-multipoint channel is adjusted, including: determining the transmission power of the point-to-multipoint channel, determining the adjustment amount of the modulation and coding strategy level of the point-to-multipoint channel, and / or determining the multimedia broadcast multicast service that needs to be adjusted; increasing the transmission power of the point-to-multipoint channel and / or reducing the modulation and coding strategy level of the point-to-multipoint channel based on the determined adjustment amount of the point-to-multipoint channel associated with the determined multimedia broadcast multicast service.

8. An apparatus (1400) for communication, comprising: at least one processor (1401); as well as At least one memory (1402) comprising computer program code (1403), the at least one memory (1402) and the computer program code (1403) being configured, together with the at least one processor (1401), to cause the apparatus (1400) to perform: Monitoring data of multimedia broadcast multicast services on point-to-multipoint channels; detecting abnormal reception of the data; and transmitting information regarding said abnormal reception in response to said detecting; The abnormal reception of the data includes at least one of the following: failure to receive the data on the point-to-multipoint channel within a predetermined time window, or decoding error of the data received via the point-to-multipoint channel; The device further performs: Receiving (1101) information about at least one of the following via at least one of radio resource control signaling, system information, or dedicated signaling: configuration of information about the abnormal reception; information about a timer for transmitting the information about the abnormal reception; at least one ongoing multimedia broadcast multicast service in a current cell or in a cell service providing one or more multimedia broadcast multicast services; or at least one quality threshold on the point-to-multipoint channel associated with the multimedia broadcast multicast service; wherein the predetermined time window for monitoring (1001) the data of the multimedia broadcast multicast service is configured based on the information of the timer; and evaluating a reception status and / or a reception quality of data of the multimedia broadcast multicast service based on the at least one quality threshold; The information about the abnormal reception includes an indication about the abnormal reception and one or more of the following additional information: at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service; at least one temporary mobile group identity TMGI of at least one ongoing multimedia broadcast multicast service in a current cell or in a serving cell providing one or more multimedia broadcast multicast services; a correctly received multimedia broadcast multicast service in at least one of the current cell and the serving cell; or at least one multimedia broadcast multicast service of interest in the current cell or the serving cell; The device further performs: In the event of abnormal reception of the data being detected, information about the multimedia broadcast multicast service associated with the data is removed from the at least one correctly received multimedia broadcast multicast service in the current cell or in the serving cell, and the additional information also includes an updated list of at least one correctly received multimedia broadcast multicast service in the current cell or in the serving cell.

9. The device (1400) according to claim 8, wherein The at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service comprises at least one of: a detected signal-to-noise ratio on the point-to-multipoint channel associated with the multimedia broadcast multicast service; Channel quality information detected on the point-to-multipoint channel associated with the multimedia broadcast multicast service; a block error rate detected on the point-to-multipoint channel associated with the multimedia broadcast multicast service; or a packet error rate detected on the point-to-multipoint channel associated with the multimedia broadcast multicast service.

10. The device (1400) according to claim 8 or 9, wherein: The information about the abnormal reception is transmitted via at least one of radio resource control signaling, a medium access control element, a physical layer signaling, or a preamble.

11. The apparatus (1400) according to claim 8, wherein The configuration of the information about the abnormal reception is associated with the multimedia broadcast multicast service.

12. The device (1400) according to claim 8, 9 or 11, wherein The data of the multimedia broadcast multicast service via the point-to-multipoint channel includes at least one of control signaling of the multimedia broadcast multicast service via a multicast control channel or service data of the multimedia broadcast multicast service via a multicast traffic channel.

13. The device (1400) according to claim 8, 9 or 11, wherein: The reception of the data of the multimedia broadcast multicast service and the transmission of the information about the abnormal reception are associated with different serving cells.

14. An apparatus (1200) for communication, comprising: at least one processor (1201); as well as At least one memory (1202) comprising computer program code (1203), the at least one memory (1202) and the computer program code (1203) being configured, together with the at least one processor (1201), to cause the apparatus (1200) to perform: Transmitting data of multimedia broadcast multicast services over point-to-multipoint channels; monitoring information about abnormal reception of the data on an uplink channel; as well as adjusting coverage of the point-to-multipoint channel based on the monitoring; In response to transmission of data of the multimedia broadcast multicast service on the point-to-multipoint channel, starting (801) a timer; and In response to receiving the information about the abnormal reception on the uplink channel before expiration of the timer, stopping (802) the timer; wherein the coverage of the point-to-multipoint channel is reduced in response to the expiration of the timer, and / or the coverage of the point-to-multipoint channel is expanded based on the information about the abnormal reception received before stopping the timer; The device further performs: Transmitting (901) information about at least one of the following via at least one of radio resource control signaling, system information, or dedicated signaling: configuration of the information about the abnormal reception; information about the timer for monitoring the information about the abnormal reception; at least one ongoing multimedia broadcast multicast service in a current cell or in a service cell providing one or more multimedia broadcast multicast services; or at least one quality threshold on the point-to-multipoint channel associated with the multimedia broadcast multicast service; The information about the abnormal reception includes an indication about the abnormal reception and one or more of the following additional information: at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service; at least one temporary mobile group identity TMGI of at least one ongoing multimedia broadcast multicast service in a current cell or in a serving cell providing one or more multimedia broadcast multicast services; a correctly received multimedia broadcast multicast service in at least one of the current cell and the serving cell; or at least one multimedia broadcast multicast service of interest in the current cell or the serving cell; The device further performs: Based on the one or more additional information, the coverage of the point-to-multipoint channel is adjusted, including: determining the transmission power of the point-to-multipoint channel, determining the adjustment amount of the modulation and coding strategy level of the point-to-multipoint channel, and / or determining the multimedia broadcast multicast service that needs to be adjusted; increasing the transmission power of the point-to-multipoint channel and / or reducing the modulation and coding strategy level of the point-to-multipoint channel based on the determined adjustment amount of the point-to-multipoint channel associated with the determined multimedia broadcast multicast service.

15. A computer-readable medium comprising: Program instructions for causing the apparatus (1200) to execute: transmitting data of a multimedia broadcast multicast service on a point-to-multipoint channel, monitoring information about abnormal reception of the data on an uplink channel, and adjusting coverage of the point-to-multipoint channel based on the monitoring; In response to transmission of data of the multimedia broadcast multicast service on the point-to-multipoint channel, starting (801) a timer; and In response to receiving the information about the abnormal reception on the uplink channel before expiration of the timer, stopping (802) the timer; wherein the coverage of the point-to-multipoint channel is reduced in response to the expiration of the timer, and / or the coverage of the point-to-multipoint channel is expanded based on the information about the abnormal reception received before stopping the timer; The device further performs: Transmitting (901) information about at least one of the following via at least one of radio resource control signaling, system information, or dedicated signaling: configuration of the information about the abnormal reception; information about the timer for monitoring the information about the abnormal reception; at least one ongoing multimedia broadcast multicast service in a current cell or in a service cell providing one or more multimedia broadcast multicast services; or at least one quality threshold on the point-to-multipoint channel associated with the multimedia broadcast multicast service; The information about the abnormal reception includes an indication about the abnormal reception and one or more of the following additional information: at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service; at least one temporary mobile group identity TMGI of at least one ongoing multimedia broadcast multicast service in a current cell or in a serving cell providing one or more multimedia broadcast multicast services; a correctly received multimedia broadcast multicast service in at least one of the current cell and the serving cell; or at least one multimedia broadcast multicast service of interest in the current cell or the serving cell; The device further performs: In the event of abnormal reception of the data being detected, information about the multimedia broadcast multicast service associated with the data is removed from the at least one correctly received multimedia broadcast multicast service in the current cell or in the serving cell, and the additional information also includes an updated list of at least one correctly received multimedia broadcast multicast service in the current cell or in the serving cell.

16. A computer-readable medium comprising: Program instructions for causing an apparatus (1400) to: monitor a point-to-multipoint channel for data of a multimedia broadcast multicast service, detect abnormal reception of the data, and transmit information about the abnormal reception in response to the detection; The abnormal reception of the data includes at least one of the following: failure to receive the data on the point-to-multipoint channel within a predetermined time window, or decoding error of the data received via the point-to-multipoint channel; The device further performs: Receiving (1101) information about at least one of the following via at least one of radio resource control signaling, system information, or dedicated signaling: configuration of information about the abnormal reception; information about a timer for transmitting the information about the abnormal reception; at least one ongoing multimedia broadcast multicast service in a current cell or in a cell service providing one or more multimedia broadcast multicast services; or at least one quality threshold on the point-to-multipoint channel associated with the multimedia broadcast multicast service; wherein the predetermined time window for monitoring (1001) the data of the multimedia broadcast multicast service is configured based on the information of the timer; and evaluating a reception status and / or a reception quality of data of the multimedia broadcast multicast service based on the at least one quality threshold; The information about the abnormal reception includes an indication about the abnormal reception and one or more of the following additional information: at least one quality detection on the point-to-multipoint channel associated with the multimedia broadcast multicast service; at least one temporary mobile group identity TMGI of at least one ongoing multimedia broadcast multicast service in a current cell or in a serving cell providing one or more multimedia broadcast multicast services; a correctly received multimedia broadcast multicast service in at least one of the current cell and the serving cell; or at least one multimedia broadcast multicast service of interest in the current cell or the serving cell; The device further performs: Based on the one or more additional information, the coverage of the point-to-multipoint channel is adjusted, including: determining the transmission power of the point-to-multipoint channel, determining the adjustment amount of the modulation and coding strategy level of the point-to-multipoint channel, and / or determining the multimedia broadcast multicast service that needs to be adjusted; increasing the transmission power of the point-to-multipoint channel and / or reducing the modulation and coding strategy level of the point-to-multipoint channel based on the determined adjustment amount of the point-to-multipoint channel associated with the determined multimedia broadcast multicast service.

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