WO2023010380A1

WO2023010380A1 - Apparatuses, methods, and computer readable media for bandwidth part switching

Info

Publication number: WO2023010380A1
Application number: PCT/CN2021/110736
Authority: WO
Inventors: Athul Prasad; Volker PAULI; David Bhatoolaul; David Navratil; Naizheng ZHENG; Ugur Baran ELMALI
Original assignee: Nokia Shanghai Bell Co., Ltd.; Nokia Solutions And Networks Oy; Nokia Technologies Oy
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2023-02-09
Also published as: CN117796028A

Abstract

Apparatuses, methods, and computer readable media for bandwidth part switching. An example 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, with the at least one processor, cause the apparatus to perform receiving a second service on a second bandwidth part for the second service, checking whether having received on the second bandwidth part a notification that a first service is stopped, and refraining from switching to a first bandwidth part for the first service if the notification that the first service is stopped is received.

Description

APPARATUSES, METHODS, AND COMPUTER READABLE MEDIA FOR BANDWIDTH PART SWITCHING

TECHNICAL FIELD

Various example embodiments relate to apparatuses, methods, and computer readable media for bandwidth part (BWP) switching.

BACKGROUND

Multicast broadcast service (MBS) may support a common frequency region (CFR) where multicast and/or broadcast traffic including data on a physical downlink shared channel (PDSCH) and control messages on a physical downlink control channel (PDCCH) can be scheduled. The CFR is located within the same user equipment (UE) dedicated BWP, for example, a BWP containing CFR is essentially dedicated to MBS traffic alone, and other BWPs are utilized for delivering unicast traffic. If a UE device initiates a large volume download and then switches to media consumption, e.g., TV broadcast, because of other MBS broadcast services in the CFR, there is very limited or no spare capacity in the BWP containing CFR to accommodate for the unicast traffic of the UE device. In a case where a dynamic BWP switching allows the UE device to switch to a BWP that does not contain CFR for unicast service and then switch back to a BWP containing CFR for MBS, if the MBS service is stopped when the UE device is receiving the unicast service on the BWP that does not contain CFR, the UE device will still switch to the BWP containing CFR and attempt to decode the PDCCH for the MBS service because the UE device is not aware of the fact that the MBS service is stopped.

SUMMARY

A brief summary of example embodiments is provided below to provide basic understanding of some aspects of various example embodiments. It should be noted that this summary is not intended to identify key features of essential elements or define scopes of the example embodiments, and its sole purpose is to introduce some concepts in a simplified form as a preamble for a more detailed description provided below.

In a first aspect, disclosed is an apparatus. 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, with the at least one processor, cause the apparatus to perform receiving a second service on a second bandwidth part for the second service, checking whether having received on the second bandwidth part a notification that a first service is stopped, and refraining from switching to a first bandwidth part for the first service if the notification that the first service is stopped is received.

In some example embodiments, the notification that the first service is stopped may be sent using downlink control information. The downlink control information may have a specific format defined for the notification that the first service is stopped. Alternatively, the notification that the first service is stopped may be signaled via a dedicated radio network temporary identifier. Alternatively, the notification that the first service is stopped may be sent using a medium access control –control element or a radio resource control configuration or reconfiguration message. An interest indication indicating an interest in receiving the first service may be sent and the notification that the first service is stopped may be sent based on the reception of the interest indication.

In some example embodiments, the first bandwidth part may be configured to be a default bandwidth part, and the second bandwidth part may be reconfigured to be the default bandwidth part if the notification that the first service is stopped is received.

In some example embodiments, the at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus to further perform switching to the first bandwidth part when entering a discontinuous reception mode on the second bandwidth part, if the notification that the first service is stopped is absent.

In some example embodiments, the entering the discontinuous reception mode may be based on an expiration of an inactivity timer configured for the second bandwidth part. The inactivity timer and related time period where no data is scheduled may be configured based on the interest indication indicating the interest in receiving the first service over the first bandwidth part, thereby allowing an autonomous switching to the first bandwidth part.

In some example embodiments, the entering the discontinuous reception mode may be based on a discontinuous reception command to stop running an inactivity timer configured for the second bandwidth part for initiating the discontinuous reception mode. The discontinuous reception command may be sent using a medium access control –control element or a radio resource control configuration or reconfiguration message.

In some example embodiments, the at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus to further perform switching to the second bandwidth part when entering a discontinuous reception mode on the first bandwidth part.

In some example embodiments, the second bandwidth part may be configured to be a default bandwidth part.

In some example embodiments, the first bandwidth part may contain a common frequency region where the first service is scheduled and the common frequency region may be absent from the second bandwidth part.

In some example embodiments, the first service may be a multicast and/or broadcast service, and the second service may be a multicast and/or unicast service. The multicast and unicast services may be expected to be scheduled on the same bandwidth part, whereas the broadcast and/or multicast service may be scheduled on an initial bandwidth part. The broadcast service and/or multicast may be received in an idle and/or inactive mode which may or may not be overlapping with the bandwidth part for the unicast service.

In some example embodiments, the first bandwidth part may be a first carrier and second bandwidth part may be a second carrier, where the first carrier and the second carrier may be operating in different frequency ranges.

In a second aspect, disclosed is an apparatus. 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, with the at least one processor, cause the apparatus to perform transmitting a second service on a second bandwidth part for the second service, checking whether a first service is stopped or to be scheduled on a first bandwidth part for the first service, and transmitting on the second bandwidth part a notification that the first service is stopped if the first service is stopped on the first bandwidth part.

In some example embodiments, the at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus to further perform configuring the first bandwidth part to be a default bandwidth part, and reconfiguring the second bandwidth part to be the default bandwidth part if transmitting on the second bandwidth part the notification that the first service is stopped.

In some example embodiments, the at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus to further perform configuring a discontinuous reception mode on the first bandwidth part and a discontinuous reception mode on the second bandwidth part for at least one user equipment device. The configuration may allow the at least one user equipment to switch from the first bandwidth part to the second bandwidth part when entering the discontinuous reception mode on the first bandwidth part and to switch from the second bandwidth part to the first bandwidth part when entering the discontinuous reception mode on the second bandwidth part.

In some example embodiments, the at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus to further perform transmitting a discontinuous reception command to stop running an inactivity timer configured for the second bandwidth part for initiating the discontinuous reception mode. The discontinuous reception command may be sent using a medium access control –control element or a radio resource control configuration or reconfiguration message.

In some example embodiments, the at least one memory and the computer program code may be further configured to, with the at least one processor, cause the apparatus to further perform configuring the second bandwidth part to be a default bandwidth part.

In a third aspect, disclosed is a method. The method may include receiving a second service on a second bandwidth part for the second service, checking whether having received on the second bandwidth part a notification that a first service is stopped, and refraining from switching to a first bandwidth part for the first service if the notification that the first service is stopped is received.

In some example embodiments, the method may further include switching to the first bandwidth part when entering a discontinuous reception mode on the second bandwidth part, if the notification that the first service is stopped is absent.

In some example embodiments, the method may further include switching to the second bandwidth part when entering a discontinuous reception mode on the first bandwidth part.

In a fourth aspect, disclosed is a method. The method may include transmitting a second service on a second bandwidth part for the second service, checking whether a first service is stopped or to be scheduled on a first bandwidth part for the first service, and transmitting on the second bandwidth part a notification that the first service is stopped if the first service is stopped on the first bandwidth part.

In some example embodiments, the method may further include configuring the first bandwidth part to be a default bandwidth part, and reconfiguring the second bandwidth part to be the default bandwidth part if transmitting on the second bandwidth part the notification that the first service is stopped.

In some example embodiments, the method may further include configuring a discontinuous reception mode on the first bandwidth part and a discontinuous reception mode on the second bandwidth part for at least one user equipment device. The configuration may allow the at least one user equipment to switch from the first bandwidth part to the second bandwidth part when entering the discontinuous reception mode on the first bandwidth part and to switch from the second bandwidth part to the first bandwidth part when entering the discontinuous reception mode on the second bandwidth part.

In some example embodiments, the method may further include transmitting a discontinuous reception command to stop running an inactivity timer configured for the second bandwidth part for initiating the discontinuous reception mode. The discontinuous reception command may be sent using a medium access control –control element or a radio resource control configuration or reconfiguration message.

In some example embodiments, the method may further include configuring the second bandwidth part to be a default bandwidth part.

In a fifth aspect, disclosed is an apparatus. The apparatus may include means for receiving a second service on a second bandwidth part for the second service, means for checking whether having received on the second bandwidth part a notification that a first service is stopped, and means for refraining from switching to a first bandwidth part for the first service if the notification that the first service is stopped is received.

In some example embodiments, the apparatus may further include means for switching to the first bandwidth part when entering a discontinuous reception mode on the second bandwidth part, if the notification that the first service is stopped is absent.

In some example embodiments, the apparatus may further include means for switching to the second bandwidth part when entering a discontinuous reception mode on the first bandwidth part.

In a sixth aspect, disclosed is an apparatus. The apparatus may include means for transmitting a second service on a second bandwidth part for the second service, means for checking whether a first service is stopped or to be scheduled on a first bandwidth part for the first service, and means for transmitting on the second bandwidth part a notification that the first service is stopped if the first service is stopped on the first bandwidth part.

In some example embodiments, the apparatus may further include means for configuring the first bandwidth part to be a default bandwidth part, and means for reconfiguring the second bandwidth part to be the default bandwidth part if transmitting on the second bandwidth part the notification that the first service is stopped.

In some example embodiments, the apparatus may further include means for configuring a discontinuous reception mode on the first bandwidth part and a discontinuous reception mode on the second bandwidth part for at least one user equipment device. The configuration may allow the at least one user equipment to switch from the first bandwidth part to the second bandwidth part when entering the discontinuous reception mode on the first bandwidth part and to switch from the second bandwidth part to the first bandwidth part when entering the discontinuous reception mode on the second bandwidth part.

In some example embodiments, the apparatus may further include means for transmitting a discontinuous reception command to stop running an inactivity timer configured for the second bandwidth part for initiating the discontinuous reception mode. The discontinuous reception command may be sent using a medium access control –control element or a radio resource control configuration or reconfiguration message.

In some example embodiments, the apparatus may further include means for configuring the second bandwidth part to be a default bandwidth part.

In a seventh aspect, a computer readable medium is disclosed. The computer readable medium may include instructions stored thereon for causing an apparatus to perform receiving a second service on a second bandwidth part for the second service, checking whether having received on the second bandwidth part a notification that a first service is stopped, and refraining from switching to a first bandwidth part for the first service if the notification that the first service is stopped is received.

In some example embodiments, the computer readable medium may further include instructions stored thereon for causing the apparatus to further perform switching to the first bandwidth part when entering a discontinuous reception mode on the second bandwidth part, if the notification that the first service is stopped is absent.

In some example embodiments, the computer readable medium may further include instructions stored thereon for causing the apparatus to further perform switching to the second bandwidth part when entering a discontinuous reception mode on the first bandwidth part.

In an eighth aspect, a computer readable medium is disclosed. The computer readable medium may include instructions stored thereon for causing an apparatus to perform transmitting a second service on a second bandwidth part for the second service, checking whether a first service is stopped or to be scheduled on a first bandwidth part for the first service, and transmitting on the second bandwidth part a notification that the first service is stopped if the first service is stopped on the first bandwidth part.

In some example embodiments, the computer readable medium may further include instructions stored thereon for causing the apparatus to further perform configuring the first bandwidth part to be a default bandwidth part, and reconfiguring the second bandwidth part to be the default bandwidth part if transmitting on the second bandwidth part the notification that the first service is stopped.

In some example embodiments, the computer readable medium may further include instructions stored thereon for causing the apparatus to further perform configuring a discontinuous reception mode on the first bandwidth part and a discontinuous reception mode on the second bandwidth part for at least one user equipment device. The configuration may allow the at least one user equipment to switch from the first bandwidth part to the second bandwidth part when entering the discontinuous reception mode on the first bandwidth part and to switch from the second bandwidth part to the first bandwidth part when entering the discontinuous reception mode on the second bandwidth part.

In some example embodiments, the computer readable medium may further include instructions stored thereon for causing the apparatus to further perform transmitting a discontinuous reception command to stop running an inactivity timer configured for the second bandwidth part for initiating the discontinuous reception mode. The discontinuous reception command may be sent using a medium access control –control element or a radio resource control configuration or reconfiguration message.

In some example embodiments, the computer readable medium may further include instructions stored thereon for causing the apparatus to further perform configuring the second bandwidth part to be a default bandwidth part.

Other features and advantages of the example embodiments of the present disclosure will also be apparent from the following description of specific example embodiments when read in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of example embodiments of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

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

FIG. 1 shows an exemplary sequence diagram for BWP switching according to an example embodiment of the present disclosure.

FIG. 2 shows an example scenario of DRX configuration in which an example embodiment of the present disclosure may be implemented.

FIG. 3 shows an example scenario of DRX configuration in which an example embodiment of the present disclosure may be implemented.

FIG. 4 shows a flow chart illustrating an example method for BWP switching according to an example embodiment of the present disclosure.

FIG. 5 shows a flow chart illustrating an example method for BWP switching according to an example embodiment of the present disclosure.

FIG. 6 shows a block diagram illustrating an example apparatus for BWP switching according to an example embodiment of the present disclosure.

FIG. 7 shows a block diagram illustrating an example apparatus for BWP switching according to an example embodiment of the present disclosure.

FIG. 8 shows a block diagram illustrating an example apparatus for BWP switching according to an example embodiment of the present disclosure.

FIG. 9 shows a block diagram illustrating an example apparatus for BWP switching according to an example embodiment of the present disclosure.

Throughout the drawings, same or similar reference numbers indicate same or similar elements. A repetitive description on the same elements would be omitted.

DETAILED DESCRIPTION

Herein below, some example embodiments are described in detail with reference to the accompanying drawings. The following description includes specific details for the purpose of providing a thorough understanding of various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well known circuits, techniques and components are shown in block diagram form to avoid obscuring the described concepts and features.

An optimized BWP switching mechanism is realized according to example embodiments of the present disclosure.

FIG. 1 shows an exemplary sequence diagram for BWP switching according to an example embodiment of the present disclosure. Referring to the FIG. 1, a UE device 110 may be a terminal device to receive a MBS service and a unicast service, and the network apparatus 120 may be a network device e.g. in a base station (BS) to transmit the MBS service and the unicast service. The UE device 110 is associated with a cell the network apparatus 120 covers.

The network apparatus 120 may transmit a first service 125 on a first BWP and/or transmit a second service 130 on a second BWP to at least one UE device. The UE device 110 may be any of the at least one UE device. The first service 125 may be for example a multicast service and/or a broadcast service, e.g., a MBS service. The second service 130 may be for example a multicast and/or unicast service. It may be appreciated that the first service 125 may be the unicast service and the second service 130 may be a multicast service and/or a broadcast service. The first BWP may be for example a BWP containing a CFR where the multicast service and/or the broadcast service may be scheduled, e.g., BWP-3, and may be on, e.g., a frequency range (FR) 1. The second BWP may be for example the BWP that does not contain the CFR, e.g., any of BWP-0, BWP-1, and BWP-2, and may be on e.g. a FR 2 –which may indicate frequency ranges, e.g., above 24 GHz and possibly below 52.6 GHz. It may be appreciated that the second BWP may be the BWP containing the CFR, and the first BWP may be other BWPs and/or possibly in other frequency ranges such as the FR 1 –which may indicate frequency ranges, e.g., between 410 MHz to 7.125 GHz. The multicast and unicast services may be expected to be scheduled on the same BWP, whereas the broadcast and/or multicast service may be scheduled on an initial BWP. The UE device 110 may receive the broadcast service and/or multicast in an idle and/or inactive mode which may or may not be overlapping with the BWP of the UE device 110 for the unicast service. In some example embodiments, the first BWP may be a first carrier and second BWP may be a second carrier, where the first carrier and the second carrier may be operating in different FRs.

The UE device 110 may signal, e.g., an interest indication message to the network apparatus 120 that the UE device 110 is receiving or interested to receive both the first service 125 and the second service 130, and the network apparatus 120 may perform operations below to allow the UE device 110 to dynamically switch between the first BWP and the second BWP.

In an operation 135, the network apparatus 120 may configure a default BWP for the UE device 110. For example, if the UE device 110 may support downlink control information (DCI) based BWP switching, for example, if the UE device 110 may decode the DCI relating to transmission of the first service 125 or the second service 130, the network apparatus 120 may configure the first BWP to be the default BWP for the UE device 110. For example, if the UE device 110 does not support the DCI based BWP switching, for example, if the UE device 110 does not decode the DCI relating to the transmission of the first service 125 or the second service 130, the network apparatus 120 may configure the second BWP to be the default BWP for the UE device 110. Then the network apparatus 120 may notify the UE device 110 of the configured default BWP.

In an operation 140, the network apparatus 120 may configure a discontinuous reception (DRX) mode on the first BWP and a DRX mode on the second BWP for at least one UE device such as the UE device 110. Then, the network apparatus 120 may transmit the DRX configuration 145 to the at least one UE device such as the UE device 110.

FIG. 2 shows an example scenario of DRX configuration 145 in which an example embodiment of the present disclosure may be implemented. Referring to the FIG. 2, when the UE device 110 enters a DRX mode 240 on the first BWP, the DRX configuration 145 may allow the UE device 110 to switch form the first BWP to the second BWP, and when the UE device 110 enters a DRX mode 230 on the second BWP, the DRX configuration 145 may allow the UE device 110 to switch form the second BWP to the first BWP. Thus, the DRX configuration 145 may allow the UE device 110 to perform autonomous BWP switching between the first BWP and the second BWP. For example, if the UE device 110 is receiving the second service 130 on the second BWP and interested in the first service 125, in an operation 180 which will be further described later the UE device 110 may switch to the first BWP when entering the DRX mode 230 on the second BWP. When the UE device 110 enters the DRX mode 240 on the first BWP, in an operation 185 which will be further described later the UE device 110 may switch back to the second BWP.

While the UE device 110 is receiving the second service 130 on the second BWP, the UE device 110 cannot receive the first service 125 on the first BWP. For example, if the first service 125 relates to broadcast control channel (BCCH) and /or multicast control channel (MCCH) scheduled on the CFR contained in the first BWP, while the UE device 110 is receiving on the second BWP, the UE device 110 cannot receive the BCCH and/or the MCCH.

While the UE device 110 is receiving the second service 130 on the second BWP, if the first service 125 is stopped on the first BWP, for example, the first service 125 has stopped on the first BWP, or the first service 125 will not be scheduled on the first BWP, the UE device 110 will not be aware of the fact that the first service 125 is stopped on the first BWP. Even if a notification that the first service 125 is stopped on the first BWP is transmitted on the first BWP, the UE device 110 may still miss the notification that the first service 125 is stopped transmitted on the first BWP due to the reception of the second service 130 no the second BWP. The consequence is that the UE device 110 will perform the autonomous BWP switching and attempts to decode the PDCCH for the first service 125 unnecessarily. Energy would be wasted in finding out that there is no data scheduled on the first BWP for the service the UE is interested in receiving.

The example embodiments of the present disclosure may optimize the autonomous BWP switching. In an example embodiment, in an operation 150, the network apparatus 120 may check whether the first service 125 is stopped or to be scheduled on the first BWP. If the first service 125 is stopped on the first BWP, the network apparatus 120 may transmit to the UE device 110 on the second BWP a notification 155 that the first service 125 is stopped.

When the UE device 110 receives a notification from the network apparatus 120, in an operation 160, the UE device 110 may check whether having received on the second BWP the notification 155 that the first service 125 is stopped. In an operation 165, the UE device 110 may refrain from switching to the first BWP if the notification 155 that the first service 125 is stopped is received. For example, if the UE device 110 checks out that the UE device 110 has received on the second BWP the notification 155 that the first service 125 on the first BWP is stopped, the UE device 110 may avoid unnecessary BWP switching from the second BWP to the first BWP when entering, e.g., the DRX 230, so that the energy for unnecessary BWP switching and PDCCH decoding may be saved.

The notification 155 that the first service 125 is stopped may be transmitted to an individual UE device, e.g., the UE device 110 via dedicated signaling, alternatively, the notification 155 that the first service 125 is stopped may be a group notification transmitted to a plurality of UE devices on the second BWP that are interested in the first service 125. In an example embodiment, the notification 155 that the first service 125 is stopped may be sent using the DCI. The DCI may have a specific format defined for the notification 155 that the first service 125 is stopped. If the UE device 110 may support the DCI based BWP switching, the UE device 110 may decode the DCI to check out the notification 155 that the first service 125 is stopped. In this case, in an operation 170, the network apparatus 120 may reconfigure the second BWP to be the default BWP if transmitting on the second BWP the notification 155 that the first service 125 is stopped.

The network apparatus 120 may decide to send the notification 155 that the first service 125 is stopped based on receiving an interest indication from the UE device 110 indicating that the UE device 110 is interested in receiving the first service 125.

For example, if the UE device 110 may support the DCI based BWP switching, the first BWP may have been configured to be the default BWP in the operation 135. If the network apparatus 120 transmits on the second BWP the DCI used for sending the notification 155 that the first service 125 is stopped, and in the operation 160 the UE device 110 decodes the DCI to check out the notification 155 that the first service 125 is stopped, in the operation 165 the UE device 110 may not switch to the first BWP. In this case, in the operation 170, the network apparatus 120 may reconfigure the second BWP to be the default BWP for the UE device 110. Then the network apparatus 120 may notify the UE device 110 of the reconfigured default BWP.

Alternatively, in the operation 150, if the network apparatus 120 checks out that there is the first service 125 to be scheduled on the first BWP, the network apparatus 120 may notify the UE device 110 the fact that there is the first service 125 to be scheduled on the first BWP using the DCI. Such a notification may be transmitted individually to the UE device 110 or be a group notification transmitted to a plurality of UE devices including the UE device 110. The UE device 110 may decode the DCI to check out the notification, and in the operation 180, the UE device 110 may switch to the first BWP, e.g., when entering the DRX 230. Additionally or alternatively, if the notification 155 that the first service 125 is stopped is absent, no matter whether the notification that there is the first service 125 to be scheduled is received, in the operation 180, the UE device 110 may switch to the first BWP when entering the DRX mode 230 on the second BWP.

In a case where the UE device 110 does not support the DCI based BWP switching, the notification 155 that the first service 125 is stopped may be sent using a dedicated signaling, e.g. a dedicated radio network temporary identifier, a radio resource control (RRC) signaling, e.g., a RRC configuration or reconfiguration message, or a medium access control-control element (MAC-CE) . If in the operation 160 the UE device 110 checks out that the notification 155 that the first service 125 is stopped sent via the RRC signaling or the MAC-CE is received, in the operation 165, the UE device 110 may not switch to the first BWP when entering the DRX mode 230.

If not receiving the notification 155 that the first service 125 is stopped, in the operation 180, the UE device 110 may switch to the first BWP when entering the DRX mode 230 on the second BWP. Alternatively or additionally, if receiving the notification, that there is the first service 125 to be scheduled, sent using the RRC signaling or the MAC-CE, in the operation 180, the UE device 110 may switch to the first BWP when entering the DRX mode 230 on the second BWP.

In an example embodiment, the UE device 110 may enter the DRX mode 230 based on an expiration of an inactivity timer configured for the second BWP. Referring to the FIG. 2, an inactivityTimer 220 may be an example of the inactivity timer configured for the second BWP, e.g. a drx-InactivityTimer, and the UE device 110 may enter the DRX mode 230 when the inactivityTimer 220 expiries. The network apparatus 120 may configure the inactivity timer 220 and related time period where no data is scheduled, e.g., the DRX mode 230 based on the interest indication from the UE device 110 indicating that the UE device 110 is interested in receiving the first service 125 over the first BWP, thereby allowing the UE device 110 to autonomously switch to the first BWP.

Alternatively, the UE device 110 may enter the DRX mode 230 based on a DRX command 175 to stop running the inactivityTimer 220 configured for the second BWP for initiating the DRX mode 230. For example, if in the operation 150 the network apparatus 120 checks out that there is the first service 125 to be scheduled when the inactivityTimer 220 is running, the network apparatus 120 may transmit to the UE device 110 the DRX command 175 to stop running the inactivityTimer 220 so that the UE device 110 may enter the DRX mode 230. The DRX command 175 may be sent using a MAC-CE or a RRC configuration or reconfiguration message. By sending the DRX command 175, the network apparatus 120 may ensure that the UE device 110 which is interested in the first service 125 may in time enter the DRX mode, e.g., an idle period of a DRX cycle, when scheduling the first service 125.

FIG. 3 shows an example scenario of DRX configuration 145 in which an example embodiment of the present disclosure may be implemented. Referring to the FIG. 3, the UE device 110 receives the DRX command 175 when the inactivityTimer 220 is running, and the dash line denotes the timing that the inactivityTimer 220 would normally expire without the DRX command 175. The DRX command 175 may stop running the inactivityTimer 220, and thus the UE device 110 may enter the DRX mode 230. If the UE device 110 receives the DRX command 175 when an onDurationTimer 210, e.g. a drx-onDurationTimer, configured for the second BWP is running, the DRX command 175 may stop running the onDurationTimer 210, such that the UE device 110 may enter the DRX mode 230.

The DRX command 175 may be transmitted using a MAC-CE, which may be or not be the MAC-CE carrying the notification that there is the first service 125 to be scheduled. When the UE device 110 enters the DRX mode 230, timers such as drx-onDurationTimer, drx-InactivityTimer, drx-RetransmissionTimerDL or drx-RetransmissionTimerUL configured for the second BWP will not be running.

If the UE device 110 has switched to the first BWP, in the operation 185, the UE device 110 may switch back to the second BWP when entering the DRX mode on the first BWP. When an inactivity timer configured for the first BWP, e.g., an inactivityTimer 250 shown in the FIG. 2 and the FIG. 3, expires, the UE device 110 may enter the DRX mode on the first BWP and may switch back to the second BWP at the beginning of a next DRX cycle.

FIG. 4 shows a flow chart illustrating an example method 400 for BWP switching according to an example embodiment of the present disclosure. The example method 400 may be performed for example at a terminal device such as the UE device 110.

Referring to the FIG. 4, the example method 400 may include an operation 410 of receiving a second service on a second bandwidth part for the second service, an operation 420 of checking whether having received on the second bandwidth part a notification that a first service is stopped, and an operation 430 of refraining from switching to a first bandwidth part for the first service if the notification that the first service is stopped is received.

Details of the operation 410 have been described in the above descriptions with respect to at least the second service 130, and repetitive descriptions thereof are omitted here.

Details of the operation 420 have been described in the above descriptions with respect to at least the operation 160, and repetitive descriptions thereof are omitted here.

Details of the operation 430 have been described in the above descriptions with respect to at least the operation 165, and repetitive descriptions thereof are omitted here.

In an example embodiment, the notification that the first service is stopped may be sent using downlink control information. The downlink control information may have a specific format defined for the notification that the first service is stopped. Alternatively, the notification that the first service is stopped may be signaled via a dedicated radio network temporary identifier. Alternatively, the notification that the first service is stopped may be sent using a medium access control –control element or a radio resource control configuration or reconfiguration message. An interest indication indicating an interest in receiving the first service may be sent and the notification that the first service is stopped may be sent based on the reception of the interest indication. The more details have been described in the above descriptions with respect to at least the notification 155, and repetitive descriptions thereof are omitted here.

In an example embodiment, the first bandwidth part may be configured to be a default bandwidth part, and the second bandwidth part may be reconfigured to be the default bandwidth part if the notification that the first service is stopped is received. The more details have been described in the above descriptions with respect to at least the operation 135 and the operation 170, and repetitive descriptions thereof are omitted here.

In an example embodiment, the example method 400 may further include an operation of switching to the first bandwidth part when entering a discontinuous reception mode on the second bandwidth part, if the notification that the first service is stopped is absent. The more details have been described in the above descriptions with respect to at least the operation 180 and the DRX mode 230, and repetitive descriptions thereof are omitted here.

In an example embodiment, the entering the discontinuous reception mode may be based on an expiration of an inactivity timer configured for the second bandwidth part. The inactivity timer and related time period where no data is scheduled may be configured based on the interest indication indicating the interest in receiving the first service over the first bandwidth part, thereby allowing an autonomous switching to the first bandwidth part. The more details have been described in the above descriptions with respect to at least the inactivityTimer 220 and the DRX mode 230, and repetitive descriptions thereof are omitted here.

In an example embodiment, the entering the discontinuous reception mode may be based on a discontinuous reception command to stop running an inactivity timer configured for the second bandwidth part for initiating the discontinuous reception mode. The discontinuous reception command may be sent using a medium access control –control element or a radio resource control configuration or reconfiguration message. The more details have been described in the above descriptions with respect to at least the DRX command 175, the inactivityTimer 220 and the DRX mode 230, and repetitive descriptions thereof are omitted here.

In an example embodiment, the example method 400 may further include an operation of switching to the second bandwidth part when entering a discontinuous reception mode on the first bandwidth part. The more details have been described in the above descriptions with respect to at least the operation 185 and the inactivityTimer 250, and repetitive descriptions thereof are omitted here.

In an example embodiment, the second bandwidth part may be configured to be a default bandwidth part. The more details have been described in the above descriptions with respect to at least the operation 135, and repetitive descriptions thereof are omitted here.

In an example embodiment, the first bandwidth part may contain a common frequency region where the first service is scheduled and the common frequency region may be absent from the second bandwidth part. The more details have been described in the above descriptions with respect to the first BWP and the second BWP, and repetitive descriptions thereof are omitted here.

In an example embodiment, the first service may be a multicast and/or broadcast service, and the second service may be a multicast and/or unicast service. The multicast and unicast services may be expected to be scheduled on the same bandwidth part, whereas the broadcast and/or multicast service may be scheduled on an initial bandwidth part. The broadcast service and/or multicast may be received in an idle and/or inactive mode which may or may not be overlapping with the bandwidth part for the unicast service. In some example embodiments, the first bandwidth part may be a first carrier and second bandwidth part may be a second carrier, where the first carrier and the second carrier may be operating in different frequency ranges. The more details have been described in the above descriptions with respect to the first BWP, the second BWP, the FR 1, the FR 2, the first service 125 and the second service 130, and repetitive descriptions thereof are omitted here.

FIG. 5 shows a flow chart illustrating an example method 500 for BWP switching according to an example embodiment of the present disclosure. The example method 500 may be performed for example at a network device such as the network apparatus 120.

Referring to the FIG. 5, the example method 500 may include an operation 510 of transmitting a second service on a second bandwidth part for the second service, an operation 520 of checking whether a first service is stopped or to be scheduled on a first bandwidth part for the first service, and an operation 530 of transmitting on the second bandwidth part a notification that the first service is stopped if the first service is stopped on the first bandwidth part.

Details of the operation 510 have been described in the above descriptions with respect to at least the second service 130, and repetitive descriptions thereof are omitted here.

Details of the operation 520 have been described in the above descriptions with respect to at least the operation 150, and repetitive descriptions thereof are omitted here.

Details of the operation 530 have been described in the above descriptions with respect to at least the notification 155, and repetitive descriptions thereof are omitted here.

In an example embodiment, the example method 500 may further include an operation of configuring the first bandwidth part to be a default bandwidth part, and an operation of reconfiguring the second bandwidth part to be the default bandwidth part if transmitting on the second bandwidth part the notification that the first service is stopped. The more details have been described in the above descriptions with respect to at least the operation 135 and the operation 170, and repetitive descriptions thereof are omitted here.

In an example embodiment, the example method 500 may further include an operation of configuring a discontinuous reception mode on the first bandwidth part and a discontinuous reception mode on the second bandwidth part for at least one user equipment device. The configuration may allow the at least one user equipment to switch from the first bandwidth part to the second bandwidth part when entering the discontinuous reception mode on the first bandwidth part and to switch from the second bandwidth part to the first bandwidth part when entering the discontinuous reception mode on the second bandwidth part. The more details have been described in the above descriptions with respect to at least the operation 140 and the DRX configuration 145, and repetitive descriptions thereof are omitted here.

In an example embodiment, the example method 500 may further include an operation of transmitting a discontinuous reception command to stop running an inactivity timer configured for the second bandwidth part for initiating the discontinuous reception mode. The discontinuous reception command may be sent using a medium access control –control element or a radio resource control configuration or reconfiguration message. The more details have been described in the above descriptions with respect to at least the DRX command 175, the inactivityTimer 220 and the DRX mode 230, and repetitive descriptions thereof are omitted here.

In an example embodiment, the example method 500 may further include an operation of configuring the second bandwidth part to be a default bandwidth part. The more details have been described in the above descriptions with respect to at least the operation 135, and repetitive descriptions thereof are omitted here.

FIG. 6 shows a block diagram illustrating an example apparatus 600 for BWP switching according to an example embodiment of the present disclosure. The apparatus, for example, may be at least part of the UE device 110 in the above examples.

As shown in the FIG. 6, the example apparatus 600 may include at least one processor 610 and at least one memory 620 that may include computer program code 630. The at least one memory 620 and the computer program code 630 may be configured to, with the at least one processor 610, cause the apparatus 600 at least to perform the example method 400 described above.

In various example embodiments, the at least one processor 610 in the example apparatus 600 may include, but 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 Field Programmable Gate Array (FPGA) and Application Specific Integrated Circuit (ASIC) . Further, the at least one processor 610 may also include at least one other circuitry or element not shown in the FIG. 6.

In various example embodiments, the at least one memory 620 in the example apparatus 600 may include at least one storage medium in various forms, such as a volatile memory and/or a non-volatile memory. The volatile memory may include, but not limited to, for example, a random-access memory (RAM) , a cache, and so on. The non-volatile memory may include, but not limited to, for example, a read only memory (ROM) , a hard disk, a flash memory, and so on. Further, the at least memory 620 may include, but are not limited to, an electric, a magnetic, an optical, an electromagnetic, an infrared, or a semiconductor system, apparatus, or device or any combination of the above.

Further, in various example embodiments, the example apparatus 600 may also include at least one other circuitry, element, and interface, for example at least one I/O interface, at least one antenna element, and the like.

In various example embodiments, the circuitries, parts, elements, and interfaces in the example apparatus 600, including the at least one processor 610 and the at least one memory 620, may be coupled together via any suitable connections including, but not limited to, buses, crossbars, wiring and/or wireless lines, in any suitable ways, for example electrically, magnetically, optically, electromagnetically, and the like.

It is appreciated that the structure of the apparatus on the side of the UE device 110 is not limited to the above example apparatus 600.

FIG. 7 shows a block diagram illustrating an example apparatus 700 for BWP switching according to an example embodiment of the present disclosure. The apparatus, for example, may be at least part of the network apparatus 120 in the above examples.

As shown in the FIG. 7, the example apparatus 700 may include at least one processor 710 and at least one memory 720 that may include computer program code 730. The at least one memory 720 and the computer program code 730 may be configured to, with the at least one processor 710, cause the apparatus 700 at least to perform at least one of the example method 500 described above.

In various example embodiments, the at least one processor 710 in the example apparatus 700 may include, but 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 Field Programmable Gate Array (FPGA) and Application Specific Integrated Circuit (ASIC) . Further, the at least one processor 510 may also include at least one other circuitry or element not shown in the FIG. 7.

In various example embodiments, the at least one memory 720 in the example apparatus 700 may include at least one storage medium in various forms, such as a volatile memory and/or a non-volatile memory. The volatile memory may include, but not limited to, for example, a random-access memory (RAM) , a cache, and so on. The non-volatile memory may include, but not limited to, for example, a read only memory (ROM) , a hard disk, a flash memory, and so on. Further, the at least memory 720 may include, but are not limited to, an electric, a magnetic, an optical, an electromagnetic, an infrared, or a semiconductor system, apparatus, or device or any combination of the above.

Further, in various example embodiments, the example apparatus 700 may also include at least one other circuitry, element, and interface, for example at least one I/O interface, at least one antenna element, and the like.

In various example embodiments, the circuitries, parts, elements, and interfaces in the example apparatus 700, including the at least one processor 710 and the at least one memory 720, may be coupled together via any suitable connections including, but not limited to, buses, crossbars, wiring and/or wireless lines, in any suitable ways, for example electrically, magnetically, optically, electromagnetically, and the like.

It is appreciated that the structure of the apparatus on the side of the network apparatus 120 is not limited to the above example apparatus 700.

FIG. 8 shows a block diagram illustrating an example apparatus 800 for BWP switching according to an example embodiment of the present disclosure. The apparatus, for example, may be at least part of the UE device 110 in the above examples.

As shown in FIG. 8, the example apparatus 800 may include means 810 for performing the operation 410 of the example method 400, means 820 for performing the operation 420 of the example method 400, and means 830 for performing the operation 430 of the example method 400. In one or more another example embodiments, at least one I/O interface, at least one antenna element, and the like may also be included in the example apparatus 800.

In some example embodiments, examples of means in the example apparatus 800 may include circuitries. For example, an example of means 810 may include a circuitry configured to perform the operation 410 of the example method 400, an example of means 820 may include a circuitry configured to perform the operation 420 of the example method 400, and an example of means 830 may include a circuitry configured to perform the operation 430 of the example method 400. In some example embodiments, examples of means may also include software modules and any other suitable function entities.

FIG. 9 shows a block diagram illustrating an example apparatus 900 for BWP switching according to an example embodiment of the present disclosure. The apparatus, for example, may be at least part of the network apparatus 120 in the above examples.

As shown in the FIG. 9, the example apparatus 900 may include means 910 for performing the operation 510 of the example method 500, means 920 for performing the operation 520 of the example method 500, and means 930 for performing the operation 530 of the example method 500. In one or more another example embodiments, at least one I/O interface, at least one antenna element, and the like may also be included in the example apparatus 900.

In some example embodiments, examples of means in the example apparatus 900 may include circuitries. For example, an example of means 910 may include a circuitry configured to perform the operation 510 of the example method 500, an example of means 920 may include a circuitry configured to perform the operation 520 of the example method 500, and an example of means 930 may include a circuitry configured to perform the operation 530 of the example method 500. In some example embodiments, examples of means may also include software modules and any other suitable function entities.

The term “circuitry” throughout this disclosure may refer to one or more or all of the following: (a) hardware-only circuit implementations (such as implementations in only analog and/or digital circuitry) ; (b) combinations of hardware circuits and software, such as (as applicable) (i) a combination of analog and/or digital hardware circuit (s) with software/firmware and (ii) any portions of hardware processor (s) with software (including digital signal processor (s) ) , software, and memory (ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) ; and (c) hardware circuit (s) and or processor (s) , such as a microprocessor (s) or a portion of a microprocessor (s) , that requires software (e.g., firmware) for operation, but the software may not be present when it is not needed for operation. This definition of circuitry applies to one or all uses of this term in this disclosure, including in any claims. As a further example, as used in this disclosure, the term circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and/or firmware. The term circuitry also covers, for example and if applicable to the claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.

Another example embodiment may relate to computer program codes or instructions which may cause an apparatus to perform at least respective methods described above. Another example embodiment may be related to a computer readable medium having such computer program codes or instructions stored thereon. In some example embodiments, such a computer readable medium may include at least one storage medium in various forms such as a volatile memory and/or a non-volatile memory. The volatile memory may include, but not limited to, for example, a RAM, a cache, and so on. The non-volatile memory may include, but not limited to, a ROM, a hard disk, a flash memory, and so on. The non-volatile memory may also include, but are not limited to, an electric, a magnetic, an optical, an electromagnetic, an infrared, or a semiconductor system, apparatus, or device or any combination of the above.

Unless the context clearly requires otherwise, throughout the description and the claims, the words “comprise, ” “comprising, ” and the like are to be construed in an inclusive sense, as opposed to an exclusive or exhaustive sense; that is to say, in the sense of “including, but not limited to. ” The word “coupled” , as generally used herein, refers to two or more elements that may be either directly connected, or connected by way of one or more intermediate elements. Likewise, the word “connected” , as generally used herein, refers to two or more elements that may be either directly connected, or connected by way of one or more intermediate elements. Additionally, the words “herein, ” “above, ” “below, ” and words of similar import, when used in this application, shall refer to this application as a whole and not to any particular portions of this application. Where the context permits, words in the description using the singular or plural number may also include the plural or singular number respectively. The word “or” in reference to a list of two or more items, that word covers all of the following interpretations of the word: any of the items in the list, all of the items in the list, and any combination of the items in the list.

Moreover, conditional language used herein, such as, among others, “can, ” “could, ” “might, ” “may, ” “e.g., ” “for example, ” “such as” and the like, unless specifically stated otherwise, or otherwise understood within the context as used, is generally intended to convey that certain example embodiments include, while other example embodiments do not include, certain features, elements and/or states. Thus, such conditional language is not generally intended to imply that features, elements and/or states are in any way required for one or more example embodiments or that one or more example embodiments necessarily include logic for deciding, with or without author input or prompting, whether these features, elements and/or states are included or are to be performed in any particular example embodiment.

As used herein, the term "determine/determining" (and grammatical variants thereof) can include, not least: calculating, computing, processing, deriving, measuring, investigating, looking up (for example, looking up in a table, a database or another data structure) , ascertaining and the like. Also, "determining" can include receiving (for example, receiving information) , accessing (for example, accessing data in a memory) , obtaining and the like. Also, "determine/determining" can include resolving, selecting, choosing, establishing, and the like.

While some example embodiments have been described, these example embodiments have been presented by way of example, and are not intended to limit the scope of the disclosure. Indeed, the apparatus, methods, and systems described herein may be embodied in a variety of other forms; furthermore, various omissions, substitutions and changes in the form of the methods and systems described herein may be made without departing from the spirit of the disclosure. For example, while blocks are presented in a given arrangement, alternative example embodiments may perform similar functionalities with different components and/or circuit topologies, and some blocks may be deleted, moved, added, subdivided, combined, and/or modified. At least one of these blocks may be implemented in a variety of different ways. The order of these blocks may also be changed. Any suitable combination of the elements and acts of the some example embodiments described above can be combined to provide further example embodiments. The accompanying claims and their equivalents are intended to cover such forms or modifications as would fall within the scope and spirit of the disclosure.

Abbreviations used in the description and/or in the figures are defined as follows:

BCCH broadcast control channel

BS base station

BWP bandwidth part

CFR common frequency region

DCI downlink control information

DL downlink

DRX discontinuous reception

FR frequency range

MAC-CE medium access control-control element

MBS multicast broadcast service

MCCH multicast control channel

PDCCH physical downlink control channel

PDSCH physical downlink shared channel

RRC radio resource control

UE user equipment

UL uplink

Claims

An apparatus comprising:

at least one processor; and

at least one memory comprising computer program code, the at least one memory and the computer program code being configured to, with the at least one processor, cause the apparatus to perform:

receiving a second service on a second bandwidth part for the second service;

checking whether having received on the second bandwidth part a notification that a first service is stopped; and

refraining from switching to a first bandwidth part for the first service if the notification that the first service is stopped is received.
The apparatus of claim 1, wherein the notification that the first service is stopped is sent using downlink control information.
The apparatus of claim 1, wherein the notification that the first service is stopped is sent using a dedicated radio network temporary identifier, a medium access control–control element and/or a radio resource control configuration or reconfiguration message.
The apparatus of claim 2, wherein the first bandwidth part is configured to be a default bandwidth part, and the second bandwidth part is reconfigured to be the default bandwidth part if the notification that the first service is stopped is received.
The apparatus of any of claims 1 to 3, the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus to further perform:

switching to the first bandwidth part when entering a discontinuous reception mode on the second bandwidth part, if the notification that the first service is stopped is absent.
The apparatus of claim 5, wherein the entering the discontinuous reception mode is based on an expiration of an inactivity timer configured for the second bandwidth part.
The apparatus of claim 5, wherein the entering the discontinuous reception mode is based on a discontinuous reception command to stop running an inactivity timer configured for the second bandwidth part for initiating the discontinuous reception mode.
The apparatus of any of claims 5 to 7, the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus to further perform:

switching to the second bandwidth part when entering a discontinuous reception mode on the first bandwidth part.
The apparatus of any of claims 5 to 8, wherein the second bandwidth part is configured to be a default bandwidth part.
The apparatus of any of claims 1 to 9, wherein the first bandwidth part contains a common frequency region where the first service is scheduled and the common frequency region is absent from the second bandwidth part.
The apparatus of any of claims 1 to 10, wherein the first service is a multicast and/or broadcast service, and the second service is a unicast service.
An apparatus comprising:

at least one processor; and

at least one memory comprising computer program code, the at least one memory and the computer program code being configured to, with the at least one processor, cause the apparatus to perform:

transmitting a second service on a second bandwidth part for the second service;

checking whether a first service is stopped or to be scheduled on a first bandwidth part for the first service; and

transmitting on the second bandwidth part a notification that the first service is stopped if the first service is stopped on the first bandwidth part.
The apparatus of claim 12, wherein the notification that the first service is stopped is sent using downlink control information.
The apparatus of claim 12, wherein the notification that the first service is stopped is sent using a dedicated radio network temporary identifier, a medium access control–control element and/or a radio resource control configuration or reconfiguration message.
The apparatus of claim 13, the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus to further perform:

configuring the first bandwidth part to be a default bandwidth part; and

reconfiguring the second bandwidth part to be the default bandwidth part if transmitting on the second bandwidth part the notification that the first service is stopped.
The apparatus of any of claims 12 to 14, the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus to further perform:

configuring a discontinuous reception mode on the first bandwidth part and a discontinuous reception mode on the second bandwidth part for at least one user equipment device, the configuration allowing the at least one user equipment to switch from the first bandwidth part to the second bandwidth part when entering the discontinuous reception mode on the first bandwidth part and to switch from the second bandwidth part to the first bandwidth part when entering the discontinuous reception mode on the second bandwidth part.
The apparatus of claim 16, the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus to further perform:

transmitting a discontinuous reception command to stop running an inactivity timer configured for the second bandwidth part for initiating the discontinuous reception mode.
The apparatus of claim 16 or 17, the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus to further perform:

configuring the second bandwidth part to be a default bandwidth part.
The apparatus of any of claims 12 to 18, wherein the first bandwidth part contains a common frequency region where the first service is scheduled and the common frequency region is absent from the second bandwidth part.
The apparatus of any of claims 12 to 19, wherein the first service is a multicast and/or broadcast service, and the second service is a unicast service.
A method comprising:

receiving a second service on a second bandwidth part for the second service;

checking whether having received on the second bandwidth part a notification that a first service is stopped; and

refraining from switching to a first bandwidth part for the first service if the notification that the first service is stopped is received.
The method of claim 21, wherein the notification that the first service is stopped is sent using downlink control information.
The method of claim 21, wherein the notification that the first service is stopped is sent using a dedicated radio network temporary identifier, a medium access control–control element and/or a radio resource control configuration or reconfiguration message.
The method of claim 22, wherein the first bandwidth part is configured to be a default bandwidth part, and the second bandwidth part is reconfigured to be the default bandwidth part if the notification that the first service is stopped is received.
The method of any of claims 21 to 23, further comprising:

switching to the first bandwidth part when entering a discontinuous reception mode on the second bandwidth part, if the notification that the first service is stopped is absent.
The method of claim 25, wherein the entering the discontinuous reception mode is based on an expiration of an inactivity timer configured for the second bandwidth part.
The method of claim 25, wherein the entering the discontinuous reception mode is based on a discontinuous reception command to stop running an inactivity timer configured for the second bandwidth part for initiating the discontinuous reception mode.
The method of any of claims 25 to 27, further comprising:

switching to the second bandwidth part when entering a discontinuous reception mode on the first bandwidth part.
The method of any of claims 25 to 28, wherein the second bandwidth part is configured to be a default bandwidth part.
The method of any of claims 21 to 29, wherein the first bandwidth part contains a common frequency region where the first service is scheduled and the common frequency region is absent from the second bandwidth part.
The method of any of claims 21 to 30, wherein the first service is a multicast and/or broadcast service, and the second service is a unicast service.
A method comprising:

transmitting a second service on a second bandwidth part for the second service;

checking whether a first service is stopped or to be scheduled on a first bandwidth part for the first service; and

transmitting on the second bandwidth part a notification that the first service is stopped if the first service is stopped on the first bandwidth part.
The method of claim 32, wherein the notification that the first service is stopped is sent using downlink control information.
The method of claim 32, wherein the notification that the first service is stopped is sent using a dedicated radio network temporary identifier, a medium access control–control element and/or a radio resource control configuration or reconfiguration message.
The method of claim 33, further comprising:

configuring the first bandwidth part to be a default bandwidth part; and

reconfiguring the second bandwidth part to be the default bandwidth part if transmitting on the second bandwidth part the notification that the first service is stopped.
The method of any of claims 32 to 34, further comprising:

configuring a discontinuous reception mode on the first bandwidth part and a discontinuous reception mode on the second bandwidth part for at least one user equipment device, the configuration allowing the at least one user equipment to switch from the first bandwidth part to the second bandwidth part when entering the discontinuous reception mode on the first bandwidth part and to switch from the second bandwidth part to the first bandwidth part when entering the discontinuous reception mode on the second bandwidth part.
The method of claim 36, further comprising:

transmitting a discontinuous reception command to stop running an inactivity timer configured for the second bandwidth part for initiating the discontinuous reception mode.
The method of claim 36 or 37, further comprising:

configuring the second bandwidth part to be a default bandwidth part.
The method of any of claims 32 to 38, wherein the first bandwidth part contains a common frequency region where the first service is scheduled and the common frequency region is absent from the second bandwidth part.
The method of any of claims 32 to 39, wherein the first service is a multicast and/or broadcast service, and the second service is a unicast service.
An apparatus comprising:

means for receiving a second service on a second bandwidth part for the second service;

means for checking whether having received on the second bandwidth part a notification that a first service is stopped; and

means for refraining from switching to a first bandwidth part for the first service if the notification that the first service is stopped is received.
An apparatus comprising:

means for transmitting a second service on a second bandwidth part for the second service;

means for checking whether a first service is stopped or to be scheduled on a first bandwidth part for the first service; and

means for transmitting on the second bandwidth part a notification that the first service is stopped if the first service is stopped on the first bandwidth part.
A computer readable medium comprising program instructions for causing an apparatus to perform:

receiving a second service on a second bandwidth part for the second service;

checking whether having received on the second bandwidth part a notification that a first service is stopped; and

refraining from switching to a first bandwidth part for the first service if the notification that the first service is stopped is received.
A computer readable medium comprising program instructions for causing an apparatus to perform:

transmitting a second service on a second bandwidth part for the second service;

checking whether a first service is stopped or to be scheduled on a first bandwidth part for the first service; and

transmitting on the second bandwidth part a notification that the first service is stopped if the first service is stopped on the first bandwidth part.