WO2019095222A1 - Method and apparatus for managing bandwidth parts - Google Patents

Method and apparatus for managing bandwidth parts Download PDF

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Publication number
WO2019095222A1
WO2019095222A1 PCT/CN2017/111405 CN2017111405W WO2019095222A1 WO 2019095222 A1 WO2019095222 A1 WO 2019095222A1 CN 2017111405 W CN2017111405 W CN 2017111405W WO 2019095222 A1 WO2019095222 A1 WO 2019095222A1
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WIPO (PCT)
Prior art keywords
cell
bandwidth part
bandwidth
random access
bwp
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PCT/CN2017/111405
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English (en)
French (fr)
Inventor
Zhongming Chen
He Huang
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ZTE Corp
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ZTE Corp
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Publication date
Priority to JP2019569300A priority Critical patent/JP6915103B2/ja
Priority to EP23190537.3A priority patent/EP4287752A1/en
Priority to PT179318472T priority patent/PT3639585T/pt
Priority to EP17931847.2A priority patent/EP3639585B1/en
Priority to KR1020207001188A priority patent/KR102303964B1/ko
Priority to DK17931847.2T priority patent/DK3639585T3/da
Application filed by ZTE Corp filed Critical ZTE Corp
Priority to CN201780093267.1A priority patent/CN110892764B/zh
Priority to PCT/CN2017/111405 priority patent/WO2019095222A1/en
Publication of WO2019095222A1 publication Critical patent/WO2019095222A1/en
Priority to US16/596,752 priority patent/US20200045702A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access

Definitions

  • This patent document is directed generally to digital wireless communications.
  • This document discloses methods, systems, and devices related to digital wireless communication, and more specifically, to techniques related to the management of bandwidth parts (BWPs) by a user equipment (UE) or a base station.
  • BWPs bandwidth parts
  • a method for wireless communication includes establishing, at a mobile device, a network connection with a first cell; receiving, at a mobile device, a message indicating an activation of a second cell, wherein the second cell includes a first bandwidth part to be used by the mobile device upon the activation of the second cell, and wherein a bandwidth part represents a logical grouping of frequency bandwidth of a cell; performing, based on the message, a random access process with the second cell using the first bandwidth part; and switching to a second bandwidth part of the second cell when the random access process fails.
  • the first cell and the second cell belong to different timing advance groups (TAGs) .
  • TAGs timing advance groups
  • the first bandwidth part is an active bandwidth part to be used for transmissions and the second bandwidth part is a default bandwidth part of the second cell. In some implementations, the second bandwidth part is pre-configured.
  • the method further includes performing a random access process with the second cell using the second bandwidth part; and receiving, at a mobile device, a message indicating a deactivation of the second cell after the random access process fails in the second bandwidth part.
  • a method for wireless communication includes establishing, at a mobile device, a network connection with a cell; performing transmissions in the cell using a first bandwidth part of the cell, wherein a bandwidth part represents a logical grouping of frequency bandwidth of the cell; and using a second bandwidth part of a serving cell to perform subsequent transmissions after a network event occurs.
  • the network event includes at least one of the following: (1) an expiration of a time alignment timer (TAT) in a timing advance group (TAG) , (2) exceeding a maximum number of scheduling request transmissions, (3) a lack of a scheduling resource, (4) a failure of a random access process, (5) an initiation of a radio resource control re-establishment, or (6) a lack of a random access resource.
  • TAT time alignment timer
  • TAG timing advance group
  • the method further includes receiving, during the performing of transmissions, a message indicating an activation of a third bandwidth part of the cell; and using the third bandwidth part for receiving or transmitting in the cell.
  • the first bandwidth part is an initial active bandwidth part or a first active bandwidth part of the cell.
  • the second bandwidth part is a default bandwidth part of the cell.
  • the second bandwidth part may be the same as the first bandwidth part.
  • the second bandwidth part may be different from the first bandwidth part.
  • the second bandwidth part is pre-configured.
  • a method for wireless communication includes establishing a network connection between a mobile device and a cell using a first bandwidth part of the cell, wherein a bandwidth part represents a logical grouping of frequency bandwidth of the cell; and using a second bandwidth part of a serving cell for receiving or transmitting with the mobile device when a network event is detected.
  • the network event includes at least one of the following: (1) an expiration of a time alignment timer (TAT) in a timing advance group (TAG) of the cell, (2) exceeding a maximum number of scheduling request transmissions, (3) a lack of a scheduling request resource, (4) a failure of a random access process, (5) an initiation of a radio resource control re-establishment, or (6) a lack of a random access resource.
  • TAT time alignment timer
  • TAG timing advance group
  • the first bandwidth part is an initial active bandwidth part or a first active bandwidth part of the cell.
  • the second bandwidth part is a default bandwidth part of the cell.
  • the second bandwidth part may be the same as the first bandwidth part.
  • the second bandwidth part may be different from the first bandwidth part.
  • the second bandwidth part is pre-configured.
  • a wireless communications apparatus comprising a processor.
  • the processor is configured to implement a method described herein.
  • the various techniques described herein may be embodied as processor-executable code and stored on a computer-readable program medium.
  • FIG. 1A shows an exemplary diagram of Carrier Aggregation (CA) in Long Term Evolution (LTE) systems.
  • CA Carrier Aggregation
  • FIG. 1B shows an exemplary diagram of multiple cells serving one or more user equipment in the network.
  • FIG. 2A shows a schematic diagram of using bandwidth parts (BWPs) to reduce user equipment (UE) bandwidth capability.
  • BWPs bandwidth parts
  • FIG. 2B shows a schematic diagram of using BWP adaptation to reduce UE energy consumption.
  • FIG. 2C shows a schematic diagram of using BWPs for frequency domain multiplexing of different numerologies.
  • FIG. 2D shows a schematic diagram of using BWPs to enable non-contiguous spectrum.
  • FIG. 3 is a flow chart representation of a method for wireless communication that can be implemented at a UE.
  • FIG. 4 is another flow chart representation of a method for wireless communication that can be implemented at a UE.
  • FIG. 5 is a flow chart representation of a method for wireless communication that can be implemented at a base station.
  • FIG. 6 shows some exemplary steps for a UE to manage BWPs when an activation of a cell fails.
  • FIG. 7 shows some exemplary steps for a UE to manage BWPs when a time alignment timer (TAT) expires.
  • TAT time alignment timer
  • FIG. 8 shows some exemplary steps for a UE to manage BWPs when it exceeds a maximum number of scheduling request (SR) transmission attempts.
  • SR scheduling request
  • FIG. 9 shows some exemplary steps for a UE to manage BWPs when there is a lack of resources in the active BWP.
  • FIG. 10 shows some exemplary steps for a UE to manage BWPs when a cell is activated multiple times by the base station.
  • FIG. 11 shows some exemplary steps for a UE to manage BWPs when a Random Access Channel (RACH) procedure fails.
  • RACH Random Access Channel
  • FIG. 12 shows some exemplary steps for a UE to manage BWPs when it receives a handover command from the base station.
  • FIG. 13 shows an example of a wireless communication system where techniques in accordance with one or more embodiments of the present technology can be applied.
  • FIG. 14 is a block diagram representation of a portion of a radio station.
  • CA Carrier Aggregation
  • DL downlink
  • UL uplink
  • the individual component carriers can also be of different bandwidths.
  • FIG. 1B shows an exemplary diagram of multiple cells serving UEs in the network.
  • the Radio Resource Control (RRC) connection is handled by one cell - the Primary serving cell (PCell) - served by the Primary Component Carrier (PCC) .
  • the other component carriers are all referred to as Secondary Component Carriers (SCCs) , serving the Secondary serving cells (SCells) .
  • SCCs are added and removed as required, while the PCC is only changed at handover.
  • NR 5G New Radio
  • eMBB enhanced mobile broadband
  • mMTC mass machine-type communication
  • ultra-reliability and low-latency business is also important to meeting the needs of various communication scenarios.
  • a physical resource block is defined as 12 consecutive subcarriers in the frequency domain.
  • NR also introduced the concept of a carrier bandwidth part (BWP) .
  • a carrier bandwidth part is a contiguous subset of the physical resource blocks for a given numerology ⁇ on a given carrier.
  • Table 1 shows exemplary Orthogonal Frequency-Division Multiplexing (OFDM) numerologies ⁇ supported in NR and their corresponding subcarrier spacing ⁇ f.
  • OFDM Orthogonal Frequency-Division Multiplexing
  • the bandwidth part can be used to support several usage scenarios.
  • BWP allows the use of reduced UE bandwidth capability (e.g., BWP 201) .
  • FIG. 2B shows an example of using bandwidth part adaptation to reduce UE energy consumption (e.g., switching from BWP2 203 to BWP1 205 to reduce energy consumption) .
  • Frequency domain multiplexing of different numerologies can also be supported, such as shown in FIG. 2C.
  • non-contiguous spectrum is enabled by the use of BWPs, as illustrated in FIG. 2D.
  • This patent document describes techniques directed to the management of the bandwidth parts, and particularly, to how a UE or a base station can determine which BWP (s) to fall back on when a network event occurs or is detected. It is noted that there are three types of BWPs: uplink (UL) BWPs, downlink (DL) BWPs, and UL/DL BWPs.
  • the BWPs in this document refer to all of these three types. That is, a BWP can be either a UP BWP, a DL BWP, or a UL/DL BWP.
  • FIG. 3 is a flow chart representation of a method 300 for wireless communication that can be implemented at a UE.
  • the method 300 includes, at 302, establishing a network connection with a first cell.
  • the method 300 then includes, at 304, receiving a message indicating an activation of a second cell.
  • the second cell includes a first bandwidth part to be used by the mobile device upon the activation of the second cell.
  • the second cell further includes a second bandwidth part.
  • the method 300 includes, at 306, performing, based on the message, a random access procedure with the second cell using the first bandwidth part.
  • the method 300 also includes, at 308, switching to a second bandwidth part of the second cell when the random access process fails.
  • the first cell can be the primary cell (PCell) for the UE.
  • the UE first establishes a connection with its PCell. It then receives a Downlink Control Information (DCI) message from the base station to activate a secondary cell (SCell) .
  • the SCell includes a first active BWP that is pre-configured prior to its activation. The first active BWP may be used by UEs without additional activation when SCell is activated.
  • the SCell may also include a default BWP that can be pre-configured by higher layers or specified in protocols .
  • the UE then initiates a Random Access (RA) /Random Access Channel (RACH) procedure to activate this SCell using the first active BWP. If the RA procedure fails, the UE switches to the default BWP of the SCell and waits for additional message (s) from the base station.
  • RA Random Access
  • RACH Random Access Channel
  • FIG. 4 is another flow chart representation of a method 400 for wireless communication that can be implemented at a UE.
  • the method 400 includes, at 402, establishing a network connection with a cell.
  • the method 400 then includes, 404, performing transmissions in the cell using a first bandwidth part.
  • the method 400 also includes, at 406, using a second bandwidth part of a serving cell for subsequent transmissions after a network event occurs.
  • a UE first establishes a network connection with a cell.
  • the UE performs transmissions in the cell using an active BWP.
  • the active BWP can be either the initial active BWP for PCell or the first active BWP for SCell.
  • the active BWP can also be other BWPs that have been activated by the base station subsequent to the activation of the cell.
  • the UE automatically switches to a second BWP.
  • the second BWP can be an active BWP in a serving cell.
  • the second BWP can be the initial active BWP for PCell, or the first active BWP for SCell.
  • the second BWP can also be the default BWP configured for the cell, or other active BWP (s) of the cell for the UE.
  • FIG. 5 is a flow chart representation of a method 500 for wireless communication that can be implemented at a base station.
  • the method 500 includes, at 502, establishing a network connection between a mobile device and a cell using a first bandwidth part of the cell.
  • the method 500 also includes, at 504, using a second bandwidth part of a serving cell for receiving or transmitting with the mobile device when a network event is detected.
  • a base station first establishes a network connection between a UE and a cell using an active BWP.
  • the active BWP can be either the initial active BWP for PCell or the first active BWP for SCell.
  • the active BWP can also be other BWPs that have been activated by the base station subsequent to the activation of the cell.
  • the base station then switches to a second BWP of a serving cell when it detects that a network event has occurred.
  • the second BWP can be the initial active BWP for PCell, or the first active BWP for SCell.
  • the second BWP can also be the default BWP configured for the cell, or other active BWP (s) of other serving cells (s) for the UE.
  • a UE establishes a connection with a primary cell Cell A.
  • Cell A includes three BWPs: p-1, p2, and p-3, in which p-1 is the default BWP and p-2 is the initial active BWP.
  • the current active BWP used for transmissions in Cell A is p-2.
  • the base station determines, based on the measurement reports, to add a secondary cell Cell B for the UE.
  • Cell A and Cell B belong to different timing advance groups (TAGs) .
  • Cell B includes four BWPs: s-1, s-2, s-3, and s-4, in which s-3 is the first active BWP and s-1 is the default BWP.
  • This embodiment shows exemplary steps for a UE to manage BWPs when a RACH procedure fails.
  • Step 11 the base station decides, based on information such as Buffer State Report (BSR) sent from the UE, to activate Cell B for the UE.
  • BSR Buffer State Report
  • the base station sends a downlink control message (e.g., DCI message) to activate Cell B.
  • DCI message e.g., DCI message
  • the first active BWP s-3 will be used by the UE without additional activation.
  • the base station indicates, over a Physical Downlink Control Channel (PDCCH) , that Cell B may initiate a RACH procedure for the UE.
  • PDCCH Physical Downlink Control Channel
  • the UE can initiate the RACH procedure.
  • Step 13 the UE performs the RACH procedure in Cell B.
  • the UE encounters an error in the RACH procedure at 602.
  • the UE then, at 604, automatically switches to a different BWP from the current active BWP (e.g., s-3) .
  • the UE switches to the default BWP s-1 of Cell B.
  • the UE also notifies the higher layer of the failure.
  • This is an example of a RACH failure trigged by an activation of a cell (e.g., Cell B) .
  • the RACH procedure can be triggered by other types of events, such as UL data arrivals.
  • Step 14 when the base station detects the RACH failure, it can deactivate Cell B. It may also activate other secondary cells based on the measurement reports it receives.
  • those cells can also automatically switch to their respective default BWP or first active BWP from the current active BWP when the failure of the RACH procedure occurs.
  • This embodiments shows exemplary steps for a UE to manage BWPs when a time alignment timer (TAT) expires.
  • TAT time alignment timer
  • the base station decides, based on information such as BSR sent from the UE, to activate Cell B for the UE.
  • the base station sends a downlink control message (e.g., a Medium Access Control (MAC) Control Element (CE) ) to activate Cell B.
  • MAC Medium Access Control
  • CE Control Element
  • the base station indicates, over a PDCCH, that Cell B may initiate a RACH procedure for the UE.
  • the UE can initiate the RACH procedure.
  • Step 23 the UE performs the RACH procedure in Cell B.
  • the UE After the UE receives Random Access Response (RAR) , the UE starts a time alignment timer (TAT) for the TAG that Cell B belongs to.
  • TAG time alignment timer
  • Step 24 after the UE performs transmissions in Cell B for a while, the base station decides, based on information such as BSR sent from the UE, to switch the active BWP to s-4 so that the UE can perform transmissions in a wider frequency band. The UE then switches to s-4 for subsequent transmissions according to base station’s indication.
  • Step 25 UE detects that the TAT for the TAG that Cell B belongs to expires at 702. Because the active BWP in Cell B is s-4, the UE, at 704, automatically switches to a different BWP from s-4 and awaits for the base station’s further instructions. In some embodiments, the UE may switch to Cell B’s default BWP s-1. In some implementations, the UE may switch to Cell B’s first active BWP s-3.
  • the base station may restart the TAT based on Tracking Area Code (TAC) .
  • TAG that Cell B belongs to includes multiple cells.
  • TAT expires, the multiple cells in the same TAG can perform the same operations. For example, all the cells in the same TAG can switch from the active BWP to the respective default BWP or the first active BWP for subsequent transmissions when the TAT expires.
  • This embodiments shows exemplary steps for a UE to manage BWPs when it exceeds a maximum number of scheduling request (SR) transmission attempts.
  • SR scheduling request
  • the base station decides, based on information such as BSR sent from the UE, to activate Cell B for the UE.
  • the base station sends a downlink control message (e.g., a MAC CE) to activate Cell B.
  • a downlink control message e.g., a MAC CE
  • the first active BWP s-3 will be used by the UE without additional activation.
  • the base station indicates, over a PDCCH, that Cell B may initiate a RACH procedure for the UE.
  • the UE can initiate the RACH procedure.
  • Step 33 the UE performs the RACH procedure in Cell B.
  • the RACH procedure completes successfully and the UE performs transmissions in Cell B using the first active BWP s-3.
  • Step 34 the UE needs to send uplink data. However, there is no uplink resources available for the UE. Therefore, the UE starts a SR procedure.
  • Step 35 the UE make multiple attempts to transmit the SR.
  • the UE after exceeding a maximum number of SR transmission attempts at 802, the UE automatically switches to a different BWP from s-3 at 804. In this particular embodiment, it switches to the default BWP s-1.
  • the UE then, at 806, performs a SR or a RACH procedure in Cell B using the different BWP.
  • Step 36 the base station monitors SR messages in both the active BWP s-3 and the default BWP s-1.
  • the base station detects an SR in the default BWP, the base station schedules uplink resources accordingly.
  • the active BWP is s-4 when the UE starts the SR procedure.
  • the UE exceeds a maximum number of SR transmission attempts in s-4, it automatically switches to a BWP different from s-4.
  • the different BWP can be the first active BWP s-3, or the default BWP s-1 as described above.
  • This embodiments shows exemplary steps for the UE to manage BWPs when there is a lack of resources in the active BWP.
  • the base station decides, based on information such as BSR sent from the UE, to activate Cell B for the UE.
  • the base station sends a downlink control message (e.g., a MAC CE) to activate Cell B.
  • a downlink control message e.g., a MAC CE
  • the first active BWP s-3 will be used by the UE without additional activation.
  • the base station indicates, over a PDCCH, that Cell B may initiate a RACH procedure for the UE.
  • the UE can initiate the RACH procedure. If there is no RACH resources in the current BWP s-3 at 902, the UE automatically switches to a BWP different from s-3 at 904. In this particular embodiment, it switches to the default BWP s-1. The UE then, at 906, performs a RACH procedure in Cell B using the default BWP s-1.
  • Step 43 the UE performs the RACH procedure in Cell B.
  • the RACH procedure completes successfully and the UE performs transmissions in Cell B using the first active BWP s-3.
  • Step 44 the UE needs to send uplink data. However, there is no uplink resources available for the UE.
  • the UE thus starts a SR procedure.
  • the UE upon determining that there is no SR resources in the current BWP s-3 at 902, the UE automatically switches to a BWP different from s-3 at 904. In this particular embodiment, it switches to the default BWP s-1.
  • the UE then, at 906, performs a SR or a RACH procedure in Cell B using the default BWP s-1.
  • Step 45 the base station detects that the active BWP s-3 of Cell B has no SR resource. The base station then switches to the default BWP s-1 accordingly and schedules uplink transmission for the UE.
  • the active BWP is s-4 when the UE starts the SR procedure.
  • the UE automatically switches to a different BWP from s-4.
  • the different BWP can be the first active BWP s-3, or the default BWP s-1 as described above.
  • Cell B or the UE can initiate a RACH procedure directly.
  • This embodiments shows exemplary steps for a UE to manage BWPs when a cell is activated multiple times by the base station.
  • the base station decides, based on information such as BSR sent from the UE, to activate Cell B for the UE.
  • the base station at 1002, sends a downlink control message (e.g., a MAC CE) to activate Cell B.
  • Cell B includes a first active BWP s-3 that will be used by the UE without additional activation.
  • the base station indicates, over a PDCCH, that Cell B may initiate a RACH procedure for the UE.
  • the UE can initiate the RACH procedure.
  • Step 53 the UE performs the RACH procedure in Cell B. After the RACH procedure completes successfully, the UE performs, at 1004, transmissions in Cell B using the first active BWP s-3.
  • Step 54 Cell B can be deactivated based on network activities.
  • the base station may send a message, based on the BSR reported by the UE, to deactivate Cell B.
  • the UE may also determines to do so when a deactivation timer expires.
  • the base station may decide, based on information such as BSR sent from the UE, to activate Cell B again for the UE.
  • the base station sends another DCI message to the UE to activate Cell B.
  • the UE at 1006, automatically switches from the current active BWP of another cell to s-3 of Cell B.
  • the DCI message may indicate that the default BWP s-1 is to be used upon the activation of Cell B.
  • This embodiments show exemplary steps for a UE to manage BWPs when a RACH procedure fails.
  • Step 61 the UE performs transmission in Cell A.
  • the UE detects that there is no uplink resources.
  • the UE then initiates a RACH procedure.
  • Step 62 the UE encounters a failure in the RACH procedure at 1102.
  • the active BWP used for transmission is p-2, so UE, at 1104, automatically switches to a different BWP. In some embodiments, the UE switches to the default BWP p-1.
  • Step 63 the UE performs, at 1106, a RRC re-establishment procedure using the different BWP p-1.
  • This embodiments show exemplary steps for a UE to manage BWPs when it receives a handover command from the base station.
  • the base station decides, based on information such as BSR sent from the UE, to activate Cell B for the UE.
  • the base station sends a downlink control message (e.g., a MAC CE) to activate Cell B.
  • a downlink control message e.g., a MAC CE
  • the first active BWP s-3 will be used by the UE without additional activation.
  • the base station indicates, over a PDCCH, that Cell B may initiate a RACH procedure for the UE.
  • the UE can initiate the RACH procedure.
  • Step 73 the UE performs the RACH procedure in Cell B.
  • the RACH procedure completes successfully and the UE performs transmissions in Cell B using the first active BWP s-3.
  • Step 74 the base station detects that signal strength in Cell A gets worse.
  • the base station keeps Cell B as the secondary cell, and sends a handover command to the UE to switch the primary cell from Cell A to Cell C.
  • Step 75 the UE receives, at 1202, the handover command from the base station to switch to Cell C.
  • the UE performs, at 1204, a MAC reset procedure.
  • the UE also automatically switches, at 1206, from the active BWP of Cell A to a different BWP, such as the initial active BWP or default BWP of Cell C.
  • FIG. 13 shows an example of a wireless communication system where techniques in accordance with one or more embodiments of the present technology can be applied.
  • a wireless communication system 400 can include one or more base stations (BSs) 1305a, 1305b, one or more wireless devices 1310a, 1310b, 1310c, 1310d, and an access network 1325.
  • a base station 1305a, 1305b can provide wireless service to wireless devices 1310a, 1310b, 1310c and 1310d in one or more wireless sectors.
  • a base station 1305a, 1305b includes directional antennas to produce two or more directional beams to provide wireless coverage in different sectors.
  • the access network 1325 can communicate with one or more base stations 1305a, 1305b.
  • the access network 1325 includes one or more base stations 1305a, 1305b.
  • the access network 1325 is in communication with a core network (not shown) that provides connectivity with other wireless communication systems and wired communication systems.
  • the core network may include one or more service subscription databases to store information related to the subscribed wireless devices 1310a, 1310b, 1310c and 1310d.
  • a first base station 1305a can provide wireless service based on a first radio access technology
  • a second base station 1305b can provide wireless service based on a second radio access technology.
  • the base stations 1305a and 1305b may be co-located or may be separately installed in the field according to the deployment scenario.
  • the access network 1325 can support multiple different radio access technologies.
  • a wireless communication system can include multiple networks using different wireless technologies.
  • a dual-mode or multi-mode wireless device includes two or more wireless technologies that could be used to connect to different wireless networks.
  • FIG. 14 is a block diagram representation of a portion of a radio station.
  • a radio station 1405 such as a base station or a wireless device (or UE) can include processor electronics 1410 such as a microprocessor that implements one or more of the wireless techniques presented in this document.
  • the radio station 1405 can include transceiver electronics 1415 to send and/or receive wireless signals over one or more communication interfaces such as antenna 1420.
  • the radio station 1405 can include other communication interfaces for transmitting and receiving data.
  • Radio station 1405 can include one or more memories (not explicitly shown) configured to store information such as data and/or instructions.
  • the processor electronics 1410 can include at least a portion of the transceiver electronics 1415. In some embodiments, at least some of the disclosed techniques, modules or functions are implemented using the radio station 1405.
  • the disclosed techniques allow a UE or a base station to automatically switch, when a network event occurs or is detected, to a BWP different from the current active BWP for subsequent transmissions in a cell, thereby minimizing signaling overhead or delay when a change of BWP is desirable.
  • the disclosed and other embodiments, modules and the functional operations described in this document can be implemented in digital electronic circuitry, or in computer software, firmware, or hardware, including the structures disclosed in this document and their structural equivalents, or in combinations of one or more of them.
  • the disclosed and other embodiments can be implemented as one or more computer program products, i.e., one or more modules of computer program instructions encoded on a computer readable medium for execution by, or to control the operation of, data processing apparatus.
  • the computer readable medium can be a machine-readable storage device, a machine-readable storage substrate, a memory device, a composition of matter effecting a machine-readable propagated signal, or a combination of one or more them.
  • data processing apparatus encompasses all apparatus, devices, and machines for processing data, including by way of example a programmable processor, a computer, or multiple processors or computers.
  • the apparatus can include, in addition to hardware, code that creates an execution environment for the computer program in question, e.g., code that constitutes processor firmware, a protocol stack, a database management system, an operating system, or a combination of one or more of them.
  • a propagated signal is an artificially generated signal, e.g., a machine-generated electrical, optical, or electromagnetic signal, that is generated to encode information for transmission to suitable receiver apparatus.
  • a computer program (also known as a program, software, software application, script, or code) can be written in any form of programming language, including compiled or interpreted languages, and it can be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment.
  • a computer program does not necessarily correspond to a file in a file system.
  • a program can be stored in a portion of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document) , in a single file dedicated to the program in question, or in multiple coordinated files (e.g., files that store one or more modules, sub programs, or portions of code) .
  • a computer program can be deployed to be executed on one computer or on multiple computers that are located at one site or distributed across multiple sites and interconnected by a communication network.
  • the processes and logic flows described in this document can be performed by one or more programmable processors executing one or more computer programs to perform functions by operating on input data and generating output.
  • the processes and logic flows can also be performed by, and apparatus can also be implemented as, special purpose logic circuitry, e.g., an FPGA (field programmable gate array) or an ASIC (application specific integrated circuit) .
  • processors suitable for the execution of a computer program include, by way of example, both general and special purpose microprocessors, and any one or more processors of any kind of digital computer.
  • a processor will receive instructions and data from a read only memory or a random access memory or both.
  • the essential elements of a computer are a processor for performing instructions and one or more memory devices for storing instructions and data.
  • a computer will also include, or be operatively coupled to receive data from or transfer data to, or both, one or more mass storage devices for storing data, e.g., magnetic, magneto optical disks, or optical disks.
  • mass storage devices for storing data, e.g., magnetic, magneto optical disks, or optical disks.
  • a computer need not have such devices.
  • Computer readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media and memory devices, including by way of example semiconductor memory devices, e.g., EPROM, EEPROM, and flash memory devices; magnetic disks, e.g., internal hard disks or removable disks; magneto optical disks; and CD ROM and DVD-ROM disks.
  • semiconductor memory devices e.g., EPROM, EEPROM, and flash memory devices
  • magnetic disks e.g., internal hard disks or removable disks
  • magneto optical disks e.g., CD ROM and DVD-ROM disks.
  • the processor and the memory can be supplemented by, or incorporated in, special purpose logic circuitry.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
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EP23190537.3A EP4287752A1 (en) 2017-11-16 2017-11-16 Method and apparatus for managing bandwidth parts
PT179318472T PT3639585T (pt) 2017-11-16 2017-11-16 Método e dispositivo para gerir partes de largura de banda
EP17931847.2A EP3639585B1 (en) 2017-11-16 2017-11-16 Method and apparatus for managing bandwidth parts
KR1020207001188A KR102303964B1 (ko) 2017-11-16 2017-11-16 대역폭 부분들을 관리하기 위한 방법 및 장치
DK17931847.2T DK3639585T3 (da) 2017-11-16 2017-11-16 Fremgangsmåde og indretning til at styre båndbreddedele
JP2019569300A JP6915103B2 (ja) 2017-11-16 2017-11-16 Ｂａｎｄｗｉｄｔｈ Ｐａｒｔｓを管理する方法および装置
CN201780093267.1A CN110892764B (zh) 2017-11-16 2017-11-16 用于管理带宽部分的方法和装置
PCT/CN2017/111405 WO2019095222A1 (en) 2017-11-16 2017-11-16 Method and apparatus for managing bandwidth parts
US16/596,752 US20200045702A1 (en) 2017-11-16 2019-10-08 Method and apparatus for managing bandwidth parts

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EP3639585B1 (en) 2023-08-23
PT3639585T (pt) 2023-09-19
KR20200015762A (ko) 2020-02-12
EP4287752A1 (en) 2023-12-06
CN110892764B (zh) 2022-04-15
DK3639585T3 (da) 2023-09-25
KR102303964B1 (ko) 2021-09-27
JP2020523886A (ja) 2020-08-06
US20200045702A1 (en) 2020-02-06

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