CN111357369A - Communication method, apparatus and computer program - Google Patents
Communication method, apparatus and computer program Download PDFInfo
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- CN111357369A CN111357369A CN201780096844.2A CN201780096844A CN111357369A CN 111357369 A CN111357369 A CN 111357369A CN 201780096844 A CN201780096844 A CN 201780096844A CN 111357369 A CN111357369 A CN 111357369A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/0064—Rate requirement of the data, e.g. scalable bandwidth, data priority
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0094—Indication of how sub-channels of the path are allocated
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/90—Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
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Abstract
A method includes receiving, at a user equipment, an indication on a first bandwidth portion. The user equipment receives a second bandwidth portion in response to receiving the indication. The second bandwidth portion is different from the first bandwidth portion. The first bandwidth part and the second bandwidth part are part of the same carrier, and the second bandwidth part comprises information associated with the indication.
Description
Technical Field
The present disclosure relates to communications, and more particularly, to methods, apparatuses, and computer programs in a wireless communication system. In particular, but not exclusively, some embodiments relate to the use of bandwidth portions.
Background
A communication system may be viewed as a facility that enables communication between two or more devices, such as user terminals, machine type terminals, base stations, and/or other nodes, by providing communication channels for carrying information between the communicating devices. A communication system may be provided, for example, by means of a communication network and one or more compatible communication devices. For example, the communication may comprise a data communication for carrying data of voice, electronic mail (email), text message, multimedia and/or content data communication, and the like. Non-limiting examples of services provided include two-way or multi-way calls, data communication or multimedia services, and access to data network systems, such as the internet.
In a wireless system, at least a portion of the communication occurs over a wireless interface. Examples of wireless systems include Public Land Mobile Networks (PLMNs), satellite-based communication systems, and different wireless local networks, e.g., Wireless Local Area Networks (WLANs). Local area wireless networking technologies that allow devices to connect to data networks are known under the trade name WiFi (or Wi-Fi). WiFi is generally used synonymously with WLAN. A wireless system may be divided into cells and is therefore commonly referred to as a cellular system. The base station provides at least one cell.
The user may access the communication system by means of a suitable communication device or terminal capable of communicating with the base station. Thus, a node such as a base station is often referred to as an access point. The user's communication device is often referred to as User Equipment (UE). The communication device is provided with suitable signal receiving and transmitting means to enable communication, e.g. with a base station and/or direct communication with other user equipment. A communication device may communicate on an appropriate channel, e.g., listen to a channel on which a station (e.g., a base station of a cell) transmits.
A communication system and associated devices typically operate in accordance with a given standard or specification which sets out what the various entities associated with the system are permitted to do and how that should be achieved. Communication protocols and/or parameters that should be used for the connection are also typically defined. Non-limiting examples of standardized radio access technologies include GSM (global system for mobile), EDGE (enhanced data for GSM Evolution) Radio Access Network (GERAN), Universal Terrestrial Radio Access Network (UTRAN), and evolved UTRAN (E-UTRAN). An example communication system architecture is the Long Term Evolution (LTE) of the Universal Mobile Telecommunications System (UMTS) radio access technology. LTE is being standardized by the third generation partnership project (3 GPP). LTE employs evolved universal terrestrial radio access network (E-UTRAN) access and its further developments, sometimes referred to as LTE-advanced (LTE-a).
Since the introduction of fourth generation (4G) services, there has been an increasing interest in the next or fifth generation (5G) standards. The 5G may also be referred to as a New Radio (NR) network. Standardization of 5G or new radio networks is an ongoing research project.
Disclosure of Invention
According to one aspect, there is provided a method comprising: causing an indication to be received at the user equipment on the first bandwidth portion; and in response to the indication, cause the user equipment to receive a second bandwidth portion, the second bandwidth portion being different from the first bandwidth portion, the first and second bandwidth portions being part of a same carrier, and the second bandwidth portion including information associated with the indication.
The carrier may be a wideband carrier.
The first bandwidth part and the second bandwidth part may belong to the same serving cell.
The method can comprise the following steps: in response to the indication, causing the user equipment to tune to a frequency associated with the second bandwidth portion.
The indication may include an indication of one or more of alarm information and change information. The change information may be update information.
The method can comprise the following steps: causing one or more of the change information and alert information to be received as the information over the second bandwidth portion.
The alarm information may include: one or more of earthquake and tsunami warning system information and commercial mobile alert system information.
The change information may include one or more changes to the system information.
The method can comprise the following steps: monitoring paging occasions on the first bandwidth portion.
The indication may be provided in a paging message.
The indication may be provided by downlink control information.
This information may be provided periodically over the second bandwidth portion.
The method can comprise the following steps: causing reception of a bandwidth portion different from the second bandwidth portion after receiving the information associated with the indication.
The different bandwidth portion may comprise the first bandwidth portion.
The method can comprise the following steps: causing information to be transmitted from the user equipment to cause the user equipment to receive the different bandwidth portions.
The second bandwidth portion may be the initial bandwidth portion.
The second bandwidth portion may include a system information block.
The method can comprise the following steps: such that the first bandwidth portion and the second bandwidth portion are received simultaneously.
According to another aspect, there is provided a method comprising: causing an indication to be transmitted to the user equipment at the first bandwidth portion; and causing transmission of a second bandwidth portion to the user equipment, the second bandwidth portion being different from the first bandwidth portion, the first and second bandwidth portions being part of the same carrier, and the second bandwidth portion comprising information associated with the indication.
The carrier may be a wideband carrier.
The first bandwidth part and the second bandwidth part may belong to the same serving cell.
The indication may include an indication of one or more of alarm information and change information. The change information may be update information.
The method can comprise the following steps: causing one or more of the change information and alert information to be received as the information over the second bandwidth portion.
The alert information may include one or more of earthquake and tsunami warning system information and commercial mobile alert system information.
The change information may include one or more changes to the system information.
The method can comprise the following steps: providing a paging occasion on the first bandwidth portion.
The indication may be provided in a paging message.
The indication may be provided by downlink control information.
This information may be provided periodically over the second bandwidth portion.
The method can comprise the following steps: causing transmission to the user equipment using a bandwidth portion different from the second bandwidth portion after causing transmission of the information associated with the indication to the user equipment.
The different bandwidth portion may comprise the first bandwidth portion.
The method can comprise the following steps: receiving information from the user equipment to cause transmission of the different bandwidth portion to the user equipment.
The second bandwidth portion may be the initial bandwidth portion.
The second bandwidth portion may include a system information block.
The method can comprise the following steps: transmitting the first bandwidth portion and the second bandwidth portion to the user equipment simultaneously.
According to another aspect, an apparatus in a user equipment is provided, the apparatus comprising: means for causing the user equipment to receive an indication on a first bandwidth portion; and means for causing the user equipment to receive a second bandwidth portion in response to the indication, the second bandwidth portion being different from the first bandwidth portion, the first and second bandwidth portions being part of a same carrier, and the second bandwidth portion comprising information associated with the indication.
The carrier may be a wideband carrier.
The first and second bandwidth portions may belong to the same serving cell.
The indication may include an indication of one or more of alarm information and change information. The change information may be update information.
The means for causing the receiving may be operable to cause the user equipment to receive one or more of the change information and alert information as the information over the second bandwidth part.
The alert information may include one or more of earthquake and tsunami warning system information and commercial mobile alert system information.
The change information may include one or more changes to the system information.
The apparatus may include means for monitoring paging occasions on the first bandwidth portion.
The indication may be provided in a paging message.
The indication may be provided by downlink control information.
This information may be provided periodically over the second bandwidth portion.
After receiving the information associated with the indication, the causing means may cause the user equipment to receive a bandwidth portion different from the second bandwidth portion.
The different bandwidth portion may comprise the first bandwidth portion.
The apparatus may include means for causing information to be transmitted from the user equipment to cause the user equipment to receive the different bandwidth portion.
The second bandwidth portion may be the initial bandwidth portion.
The second bandwidth portion may include a system information block.
The causing means may be for causing said user equipment to receive said first bandwidth portion and said second bandwidth portion simultaneously.
According to another aspect, there is provided an apparatus comprising: means for causing an indication to be transmitted to the user equipment on the first bandwidth portion; and means for causing transmission of a second bandwidth portion to the user equipment, the second bandwidth portion being different from the first bandwidth portion, the first and second bandwidth portions being part of the same carrier, and the second bandwidth portion comprising information associated with the indication.
The carrier may be a wideband carrier.
The first and second bandwidth portions may belong to the same serving cell.
The indication may include an indication of one or more of alarm information and change information. The change information may be update information.
The means for causing transmission may cause one or more of the change information and alert information to be received as the information over the second bandwidth portion.
The alert information may include one or more of earthquake and tsunami warning system information and commercial mobile alert system information.
The change information may include one or more changes to the system information.
The apparatus may include means for providing paging occasions on the first bandwidth portion.
The indication may be provided in a paging message.
The indication may be provided by downlink control information.
This information may be provided periodically over the second bandwidth portion.
The means for causing transmission may be for causing transmission to the user equipment using a portion of bandwidth different from the second portion of bandwidth after causing transmission of the information associated with the indication to the user equipment.
The different bandwidth portion may comprise the first bandwidth portion.
The apparatus may include means for receiving information from the user equipment to cause transmission of the different bandwidth portion to the user equipment.
The second bandwidth portion may be the initial bandwidth portion.
The second bandwidth portion may include a system information block.
The means for causing transmission may be for causing the first bandwidth portion and the second bandwidth portion to be transmitted to the user equipment simultaneously.
According to another aspect, there is provided an apparatus in a user equipment, the apparatus comprising at least one processor and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured, with the at least one processor: causing an indication to be received on the first bandwidth portion; and in response to the indication, cause reception of a second bandwidth portion, the second bandwidth portion being different from the first bandwidth portion, the first and second bandwidth portions being part of a same carrier, and the second bandwidth portion including information associated with the indication.
The carrier may be a wideband carrier.
The first bandwidth part and the second bandwidth part may belong to the same serving cell.
The at least one memory and the computer code may be configured, with the at least one processor, to cause tuning of the user equipment to a frequency associated with the second bandwidth portion in response to the indication.
The indication may include an indication of one or more of alarm information and change information. The change information may be update information.
The at least one memory and the computer code may be configured to, with the at least one processor, cause one or more of the change information and the alert information to be received as the information over the second bandwidth portion.
The alert information may include one or more of earthquake and tsunami warning system information and commercial mobile alert system information.
The change information may include one or more changes to the system information.
The at least one memory and the computer code may be configured, with the at least one processor, to cause monitoring of paging occasions on the first bandwidth portion.
The indication may be provided in a paging message.
The indication may be provided by downlink control information.
This information may be provided periodically over the second bandwidth portion.
The at least one memory and the computer code may be configured, with the at least one processor, to cause receipt of a portion of bandwidth different from the second portion of bandwidth after receipt of the information associated with the indication.
The different bandwidth portion may comprise the first bandwidth portion.
The at least one memory and the computer code may be configured, with the at least one processor, to cause transmission of information from the user equipment to cause the user equipment to receive the different bandwidth portion.
The second bandwidth portion may be the initial bandwidth portion.
The second bandwidth portion may include a system information block.
The at least one memory and the computer code may be configured to, with the at least one processor, cause the first bandwidth portion and the second bandwidth portion to be received simultaneously.
According to another aspect, there is provided an apparatus comprising at least one processor and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured, with the at least one processor: causing an indication to be transmitted to the user equipment on the first bandwidth portion; and causing transmission of a second bandwidth portion to the user equipment, the second bandwidth portion being different from the first bandwidth portion, the first and second bandwidth portions being part of the same carrier, and the second bandwidth portion comprising information associated with the indication.
The carrier may be a wideband carrier.
The first and second bandwidth portions may belong to the same serving cell.
The indication may include an indication of one or more of alarm information and change information. The change information may be update information.
The at least one memory and the computer code may be configured to, with the at least one processor, cause transmission of one or more of the change information and the alert information as the information over the second bandwidth portion.
The alert information may include one or more of earthquake and tsunami warning system information and commercial mobile alert system information.
The change information may include one or more changes to the system information.
The at least one memory and the computer code may be configured, with the at least one processor, to provide paging occasions on the first bandwidth portion.
The indication may be provided in a paging message.
The indication may be provided by downlink control information.
This information may be provided periodically over the second bandwidth portion.
The at least one memory and the computer code may be configured, with the at least one processor, to cause transmission of a portion of bandwidth different from the second portion of bandwidth to a user equipment after causing transmission of the information associated with the indication to the user equipment.
The different bandwidth portion may comprise the first bandwidth portion.
The at least one memory and the computer code may be configured, with the at least one processor, to receive information from the user equipment to cause transmission of the different bandwidth portion to the user equipment.
The second bandwidth portion may be the initial bandwidth portion.
The second bandwidth portion may include a system information block.
The at least one memory and the computer code may be configured, with the at least one processor, to cause the first bandwidth portion and the second bandwidth portion to be transmitted to the user equipment simultaneously.
An apparatus and/or communication system may also be provided, including an apparatus configured to provide at least one of the embodiments. The device may comprise a communication device, such as a user equipment or another node or a network node capable of wireless communication.
A computer program comprising program code means adapted to perform the method described herein may also be provided.
According to further embodiments, there is provided an apparatus and/or a computer program product that may be embodied on a computer-readable medium to provide at least one of the methods described above.
Various other aspects and further embodiments are also described in the following detailed description and the appended claims, which embody examples of the present invention.
Drawings
Some embodiments will now be described in further detail, by way of example only, with reference to the following examples and the accompanying drawings, in which:
fig. 1 shows a schematic example of a wireless communication system in which the present invention may be implemented;
FIG. 2 shows an example of a communication device;
fig. 3 shows an example of a control device provided in a base station, for example;
FIG. 4 is a flow diagram of a method according to an example;
fig. 5 schematically shows a BWP (bandwidth part) used by a user equipment; and
fig. 6 is a flow chart of a method according to an example.
Detailed Description
Before explaining the examples in detail, certain general principles of wireless communication systems and mobile communication systems are briefly explained with reference to fig. 1 to 2 to help understand the underlying technologies of the described examples.
In a wireless communication system 100 such as that shown in fig. 1, wireless communication devices (e.g., User Equipment (UE) or MTC devices 102, 104, 105) provide wireless access via at least one base station or similar wireless transmission and/or reception wireless infrastructure node or point. Such a node may be, for example, a base station or enodeb (enb), or in a 5G system, a next generation nodeb (gnb) or other wireless infrastructure node. These nodes are often referred to as base stations. The base stations are typically controlled by at least one suitable controller means to enable operation and management of the mobile communications devices in communication with the base stations. The controller device may be located in a radio access network (e.g., the wireless communication system 100) or in a Core Network (CN) (not shown), and may be implemented as one central device or its functionality may be distributed over multiple devices. The controller device may be part of the base station and/or provided by a separate entity such as a radio network controller. In fig. 1, control means 108 and 109 are shown to control the respective macro base stations 106 and 107. In some systems, the control means may additionally or alternatively be provided in the radio network controller. Other examples of radio access systems include those provided by base stations of systems based on technologies such as 5G or new radio, Wireless Local Area Network (WLAN) and/or WiMax (worldwide interoperability for microwave access). A base station may provide coverage for an entire cell or similar radio service area.
In fig. 1, base stations 106 and 107 are shown connected to a wider communications network 113 via a gateway 112. Further gateway functionality may be provided to connect to another network.
A possible wireless communication device will now be described in more detail with reference to fig. 2, which shows a schematic partial cross-sectional view of a communication device 200. Such communication devices are often referred to as User Equipment (UE) or terminals. Suitable mobile communication devices may be provided by any device capable of sending and receiving radio signals. Non-limiting examples include a Mobile Station (MS) or a mobile device such as a mobile phone or a so-called 'smart phone', a computer provided with a wireless interface card or other wireless interface facility (e.g., a USB dongle), a Personal Digital Assistant (PDA) or tablet computer provided with wireless communication capabilities, or any combination of these, etc. For example, mobile communication devices may provide for communication of data for carrying communications such as voice, electronic mail (email), text messages, multimedia and so on. Many services can be offered and provided to the user via their communication device. Non-limiting examples of such services include two-way or multi-way calls, data communications or multimedia services, or simply access to a data communications network system, such as the internet. The user may also provide broadcast or multicast data. Non-limiting examples of content include downloads, television and radio programs, videos, advertisements, various alerts, and other information.
The wireless communication device may be, for example, a mobile device, i.e., a device that is not fixed in a particular location, or may be a stationary device. Wireless devices may or may not require human interaction to communicate. In the present teachings, the term UE or "user" is used to refer to any type of wireless communication device.
The wireless device 200 may receive signals over an air or radio interface 207 via appropriate means for receiving and may transmit signals via appropriate means for transmitting radio signals. In fig. 2, a transceiver device is schematically designated by block 206. For example, the transceiver device 206 may be provided by means of a radio and an associated antenna arrangement. The antenna arrangement may be provided inside or outside the wireless device. The transceiver device may include a tuner 210 that tunes the transceiver to a desired receive frequency.
The wireless device is typically provided with at least one data processing entity 201, at least one memory 202 and possibly other components 203 for software and hardware assistance in performing tasks designed to be performed, including controlling access to and communication with access systems and other communication devices. The data processing, storage and other related control means may be provided on a suitable circuit board and/or in a chipset. This feature is denoted by reference numeral 204. The user may control the operation of the wireless device by means of a suitable user interface, such as a keypad 205, voice commands, touch sensitive screen or pad, combinations thereof, and the like. A display 208, a speaker, and a microphone may also be provided. Further, the wireless communication device may include appropriate connectors (wired or wireless) to other devices and/or for connecting external accessories (e.g., hands-free devices) thereto. The communication devices 102, 104, 105 may access the communication system based on various access technologies.
Fig. 3 shows an example of the control device. The control device may be provided in a base station or a gNB, for example. The control device 300 comprises at least one memory 301, at least one data processing unit 302, 303 and an input/output interface 304. Via the interface, the control means may be coupled to the receiver and the transmitter of the base station. The receiver and/or transmitter may be implemented as a radio front end or a remote radio head. For example, the control device 300 or the processor 301 may be configured to execute suitable software code to provide the control functionality.
In NR, a new concept of bandwidth part (BWP) has been introduced, where each UE may operate on a different bandwidth part within a single wideband carrier. It is defined in 3GPP TS 38.211V1.0.0 (section 4.4.5) as a contiguous subset of physical resource blocks of a given number on a given carrier. In contrast to previous 3GPP systems, in which the system bandwidth is cell-specific, the bandwidth part can be configured specifically for a particular UE using only dedicated signaling from the gNB and may depend, for example, on the capabilities of the UE. According to the current development of NR systems and current protocols in 3GPP, BWP can operate with or without SS (synchronization signal) blocks for carrying NR-SS as well as MIB (master information block) and Physical Cell Identity (PCI).
One reason for BWP is the ability to support limited-capability UEs (e.g., in terms of Tx/Rx bandwidth) even on wideband carriers deployed from a system perspective.
In some scenarios, the BPW may be used to achieve reduced power consumption.
3GPP TS 38.213V1.0.0 (section 11) proposes "configuring a UE for operation in a bandwidth part (BWP) of a serving cell by a higher layer to configure the serving cell with a set of bandwidth parts (BWPs) for reception by the UE (DL (downlink) set of BWPs) or a set of BWPs for transmission by the UE (UL (uplink) set of BWPs)". In this case, the higher layer signaling means dedicated RRC (radio resource control) signaling. It has been proposed that for a given time, there is at most one active DL BWP and at most one active UL BWP for the serving cell of the UE, at least for a UE implemented according to release 15 of the 3GPP NR specification. However, in other embodiments, there may be more than one active DL BWP and more than one active UL BWP.
In 3GPP TS 38.211V1.0.0 (section 4.4.5), it is indicated that the UE is not expected to receive PDSCH (physical downlink shared channel) or PDCCH (physical downlink control channel) outside the active bandwidth part, and the UE should not transmit PUSCH (physical uplink shared channel) or PUCCH (physical uplink control channel) outside the active bandwidth part. The active BWP within the serving cell may be handed over for the UE using at least layer 1 signaling from the gNB, such as scheduling DCI (downlink control information). More specifically, NR has been proposed to support the following cases: a single scheduling DCI may switch the active BWP of a UE from one (in the same link direction) to another within a given serving cell.
Some aspects of BWP are described in the following specifications:
3GPP TS 38.211V1.0.0 "NR; physical channel and modulation "
3GPP TS 38.213V1.0.0 "NR; physical layer procedure for control "
Currently, it has been proposed that a UE can operate with a single active BWP at a time for the serving cell. In contrast to Component Carriers (CCs) known from Carrier Aggregation (CA) features of LTE technology, BWPs belong to the same serving cell and are part of the same wideband carrier. For high bandwidth capable UEs, this allows network deployment with wide bandwidth carriers without combining multiple carriers with CA, but at the same time, lower capable UEs can be served by means of narrower BWP.
There may be an initial BWP, which carries SS blocks. This may also have RMSI (minimum system information remaining).
The bandwidth of the initial BWP may be set such that even a UE having a bandwidth limitation can receive basic information, such as SS blocks and/or RMSI. Therefore, the maximum bandwidth of the initial BWP may depend on the width of the Physical Broadcast Channel (PBCH) width. With current NR recommendations, the width of PBCH may depend on the number configured for the carrier, and may be, for example, 4.3MHz for 15kHz subcarrier spacing (SCS), 8.6MHz for 30kHz SCS, 34.5MHz for 120kHz SCS, or 69.12MHz for 240kHz SCS.
The UE may use initial BWP for idle mode measurements and mobility and/or for initial access to the cell.
Once the UE is in the connected state, it may be configured with a default BWP over the network, which may be set as the initial BWP for the cell. The default BWP may be the same as or different from the initial BWP. The initial BWP may broadcast other SIBs (system information blocks) periodically or at the request of the UE.
However, with the current proposal, once a UE in RRC connected state is configured to operate on a different BWP than the initial BWP, the UE will not have access to the latest System Information (SI) when updated.
One option is to copy the same SI on all active BWPs. This has the advantage of being easy to implement. This may be inefficient in terms of radio resource usage.
Another option is to require the UE to periodically re-tune back to the initial BWP to check if there are any SI updates. This option may require measuring gaps and interrupting data transmission on the active BWP.
Some embodiments may provide a more efficient way of ensuring that the UE always obtains updated system information.
For BWP, some embodiments may support single and multiple SS block transmission in wideband CCs (component carriers) in the frequency domain.
Measurement gaps for RRM measurements using SS blocks and possibly for other purposes (e.g. path loss measurements for UL power control) are supported for non- (carrier aggregation) CA UEs with less BW capability and possibly for CA UEs.
In some embodiments, one or more of the following rules may be applied. This may be used for SI change notifications and/or notifications related to public warning systems such as, for example, ETWS (earthquake and tsunami warning system) and/or CMAS (commercial mobile alert system).
It should be appreciated that this may apply to how the UE acquires the updated SI. An example of a method will now be described with reference to fig. 4. This is from the perspective of the UE and will be described with reference to fig. 5.
In step S1, the UE will monitor the initial BWP. In some embodiments, the initial BWP may provide system information. In some embodiments, the initial BWP will carry the SIB. In some embodiments, the initial BWP may be used when, for example, the UE is in idle mode or unconnected mode.
Which BWP the UE is using is shown in fig. 5. Fig. 5 plots frequency versus time. At time t0And t1In between, the UE is in idle mode and monitors for initial BWP. It should be appreciated that the initial BWP may always be in a particular position in the BW or may depend on a particular BW.
In step S2, the UE enters active or RRC connected mode and will use a different BWP. The different BWP is different in frequency band from the default BWP but still resides within the limits of the wideband carrier utilized. This is shown in fig. 5. UE at time t1A connected mode is entered.
In step S3, the UE monitors for a change notification regarding its active BWP (different BWP). This may be done using one or more of the following options:
by monitoring the paging occasion with the P-RNTI (paging radio network temporary identifier) and reading the paging message on the active BWP of the UE. Connected UEs on a certain active BWP may be configured with a common PO (paging occasion) to receive possible notifications. One or more BWPs may not serve idle or inactive UEs through paging. In some embodiments, it may be configured that the UE should follow a conventional PO calculation method. In this case, the UE may be configured by paging on a per BWP basis; and
so-called direct indication information is received by using layer 1 signaling (DCI). This information may be scrambled with a P-RNTI pair in CSS (common search space) or USS (user specific search space).
In step S4, the UE receives the notification, and the UE is configured to receive the initial BWP. For example, the UE may retune the receiver to the initial BWP to acquire updated system information or ETWS/CMAS related information. The updated system information or ETWS/CMAS information may be periodically broadcast or provided on demand (so-called SI on demand) through the initial BWP of the broadband carrier. This may be achieved using one or more of the following options:
1) the network or the gNB may configure a measurement gap that matches the time at which the UE can read the SI on the initial BWP.
The network or base station may assume these are only used by the UE when SI notification has been signaled;
2) the network or the gNB may assume that the UE is not available for data transmission on the non-initial BWP for a specified time, which corresponds to the time required for the UE to acquire the updated SI from the initial BWP.
The UE may monitor at least one or both of CSS and USS on the initial BWP.
In some embodiments, data transmission may also be continued on the initial BWP portion.
Alternatively or additionally, if implicit switching based on data activity is specified, when the UE switches to the initial BWP for SI update, the UE may not automatically switch back to another BWP based on data activity until the SI is correctly received; and
3) the network or the gNB may switch the active BWP of the UE to the initial BWP within a specified time to allow it to acquire the updated SI.
The handover may use one or more of layer 1 signaling/DCI, MAC CE (medium access control element), or dedicated RRC signaling.
The signaling used to switch BWP may contain the following information: BWP handover is done (or related notifications may be included such as SI change, ETWS/CMAS notification, etc.) due to the need for SI update, so that the UE will read the SIB at the right time, such as the next modification period or immediately.
In this option, step S3 may be omitted because the paging notification may be combined with the handover command.
FIG. 5 shows a UE at time t2And t3Receives the initial BWP.
In step S5, the UE may revert to a different BWP. In some embodiments, this may occur automatically, for example, after a given period of time. In other embodiments, the gNB may be informed using additional signaling (e.g., using PUCCH/UCI/RRC) from the UE to the gNB or RAN (radio access network), for example: the UE has finished acquiring the updated SI and may switch the BWP back to the last BWP (a different one).
FIG. 5 shows at time t3After which the UE receives a different BWP again.
In some embodiments, the UE may be able to receive both the initial BWP and the dedicated BWP simultaneously without interrupting one or the other of the initial BWP and the dedicated BWP. In this embodiment, the UE may receive the SIB on the initial BWP and continue the activity on the active BWP at the same time.
This may result in an interruption of packet reception for those embodiments where the UE needs to retune to switch between receiving the initial BWP and the active BWP. In some embodiments, the gNB or other network entity will need to take this into account to understand why some packets were lost during retuning. Some options for dealing with this problem were mentioned previously. For example, the gNB may suspend transmission for the duration of a given time period. This may be controlled by a timer. The gNB may send the data packet over the initial BWP. In some embodiments, the UE will send an indication or information to the gNB indicating when it has acquired the necessary information, etc., and/or is ready to switch from the initial bandwidth.
Referring to fig. 6, one method is shown from the perspective of the gNB.
In step T1, the gNB transmits the initial BWP with reference information such as system information.
In step T2, the UE enters RRC connected state and the gNB will transmit information to the UE to cause the UE to switch to a different BWP.
In step T3, the gNB sends a notification such as previously discussed to the UE on a different BWP.
In step T4, the gNB transmits information on the initial BWP.
The method of fig. 6 may be performed at least in part by or under the control of a control device.
Some embodiments have been described with respect to SI change notifications and/or ETWAS/CMAS notifications. It should be appreciated that other embodiments may alternatively or additionally be used with other notifications. Some embodiments may be used with notifications that require reading of updated information from the SI regarding the initial BWP. For example, an EAB (extended access restriction) parameter may be modified. In this example, a notification will be provided on the current BWP indicating that there are modified EAB parameters that require reading of the modified EAB parameters on the initial BWP.
Some embodiments may conserve radio resources since SI need not be replicated on every active BWP.
In some embodiments, the UE may need to re-tune to the initial BWP only when the SI actually changes. This is because SI change notifications and/or ETWS/CMAS notifications are provided on the active BWP.
In general, the various embodiments may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects of the invention may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device, although the invention is not limited thereto. While various aspects of the invention may be illustrated and described as block diagrams, flow charts, or using some other pictorial representation, it is well understood that these blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
Embodiments of the invention may be implemented by computer software executable by a data processor of a mobile device, such as in a processor entity, or by hardware, or by a combination of software and hardware. Computer software or programs (also referred to as program code, including software routines, applets, and/or macros) can be stored in any device-readable data storage medium, and they include program instructions to perform particular tasks. The computer program product may comprise one or more computer-executable components which, when the program is run, are configured to perform an embodiment. The one or more computer-executable components may be at least one software code or portion thereof.
Further in this regard it should be noted that any block of the logic flow as in the figures may represent a program step or an interconnected logic circuit, block or function or a combination of a program step and a logic circuit, block or function. The software may be stored on such physical media as memory chips, or memory blocks implemented within a processor, magnetic storage such as hard or floppy disks, and optical storage such as, for example, DVDs and their data variants CDs. The physical medium is a non-transitory medium.
The memory may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory. The data processor may be of any type suitable to the local technical environment, and may include one or more of general purpose computers, special purpose computers, microprocessors, Data Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), FPGAs, gate level circuits and processors based on a multi-core processor architecture, as non-limiting examples.
Embodiments of the invention may be practiced in various components such as integrated circuit modules. The design of integrated circuits is by and large a highly automated process. Complex and powerful software tools are available for converting a logic level design into a semiconductor circuit design ready to be etched and formed on a semiconductor substrate.
The foregoing description provides by way of non-limiting example a full and informative description of the exemplary embodiments of this invention. However, various modifications and adaptations may become apparent to those skilled in the relevant arts in view of the foregoing description, when read in conjunction with the accompanying drawings and the appended claims. However, all such and similar modifications of the teachings of this invention will still fall within the scope of this invention, as defined in the appended claims. Indeed, there is yet another embodiment that includes a combination of one or more embodiments with any other embodiments previously discussed.
Claims (25)
1. A method, comprising:
causing an indication to be received at the user equipment on the first bandwidth portion; and
in response to receiving the indication, cause the user equipment to receive a second bandwidth portion, the second bandwidth portion being different from the first bandwidth portion, the first bandwidth portion and the second bandwidth portion being portions of a same carrier, and the second bandwidth portion including information associated with the indication.
2. The method of claim 1, wherein the indication comprises an indication of one or more of alarm information and change information.
3. The method of claim 2, comprising: causing one or more of the change information and the alert information to be received as the information over the second bandwidth portion.
4. The method of claim 2 or 3, wherein the alert information comprises: one or more of earthquake and tsunami warning system information and commercial mobile alert system information.
5. The method of any of claims 2 to 4, wherein the change information comprises one or more changes in system information.
6. The method according to any of the preceding claims, comprising: monitoring paging occasions on the first bandwidth portion.
7. The method of claim 6, wherein the indication is provided in a paging message.
8. The method according to any of the preceding claims, wherein the indication is provided by downlink control information.
9. The method according to any of the preceding claims, wherein the information is provided periodically over the second bandwidth portion.
10. The method according to any of the preceding claims, comprising: causing reception of a bandwidth portion different from the second bandwidth portion after receiving the information associated with the indication.
11. The method of claim 10, wherein the different bandwidth portion comprises the first bandwidth portion.
12. The method according to claim 10 or 11, comprising: causing information to be transmitted from the user equipment to cause the user equipment to receive the different bandwidth portion.
13. The method of any preceding claim, wherein the second bandwidth portion is an initial bandwidth portion.
14. The method of any preceding claim, wherein the second bandwidth portion comprises a system information block.
15. The method according to any of the preceding claims, comprising: such that the first bandwidth portion and the second bandwidth portion are received simultaneously.
16. A method, comprising:
causing an indication to be transmitted to the user equipment on the first bandwidth portion; and
causing transmission of a second bandwidth portion to the user equipment, the second bandwidth portion being different from the first bandwidth portion, the first and second bandwidth portions being part of the same carrier, and the second bandwidth portion comprising information associated with the indication.
17. The method of claim 16, wherein the indication comprises an indication of one or more of alarm information and change information.
18. The method of claim 16 or 17, wherein the indication is provided in one or more of a paging message and downlink control information.
19. The method of any of claims 16 to 18, comprising: periodically providing the information over the second bandwidth portion.
20. The method of any of claims 16 to 19, comprising: causing transmission of the information associated with the indication to the user equipment to cause transmission to the user equipment using a different portion of bandwidth than the second portion of bandwidth.
21. The method of claim 20, comprising: receiving information from the user equipment to cause transmission of the different bandwidth portion to the user equipment.
22. The method of any of claims 16 to 21, wherein the second bandwidth portion comprises a system information block.
23. A computer program product comprising computer executable code which when run on at least one processor causes the method according to any of the preceding claims to be performed.
24. An apparatus in a user equipment, the apparatus comprising at least one processor and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured, with the at least one processor:
causing an indication to be received on the first bandwidth portion; and
in response to the indication, cause reception of a second bandwidth portion, the second bandwidth portion being different from the first bandwidth portion, the first and second bandwidth portions being part of a same carrier, and the second bandwidth portion including information associated with the indication.
25. An apparatus comprising at least one processor and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured, with the at least one processor, to:
causing an indication to be transmitted to the user equipment on the first bandwidth portion; and
causing transmission of a second bandwidth portion to the user equipment, the second bandwidth portion being different from the first bandwidth portion, the first and second bandwidth portions being part of the same carrier, and the second bandwidth portion comprising information associated with the indication.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| PCT/CN2017/105273 WO2019068224A1 (en) | 2017-10-06 | 2017-10-06 | Communications method, apparatus and computer program |
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| CN111699731B (en) | 2018-01-12 | 2023-11-17 | 联想（新加坡）私人有限公司 | Receiving paging messages |
| WO2019149109A1 (en) | 2018-02-01 | 2019-08-08 | 华为技术有限公司 | System message updating method, device and system |
| CN111867064B (en) * | 2019-04-29 | 2023-08-04 | 华为技术有限公司 | Communication method and device |
| KR20240148343A (en) * | 2022-02-12 | 2024-10-11 | 애플 인크. | Enhanced Redcap User Equipment |
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