I 1111111111111111 1111111111 111111111111111 1111111111 111111111111111 IIII IIII
`US010470203B2
`
`c12) United States Patent
`Falahati et al.
`
`US 10,470,203 B2
`(IO) Patent No.:
`(45) Date of Patent:
`Nov. 5, 2019
`
`(54) SCHEDULING REQUEST RESOURCE
`CONFIGURATION
`
`(71) Applicant: Telefonaktiebolaget LM Ericsson
`(publ), Stockholm (SE)
`
`(72)
`
`Inventors: Sorour Falahati, Stockholm (SE);
`Robert Baldemair, Solna (SE)
`
`(73) Assignee: Telefonaktiebolaget LM Ericsson
`(Puhl) (SE)
`
`( *) Notice:
`
`Subject to any disclaimer, the term ofthis
`patent is extended or adjusted under 35
`U.S.C. 154(b) by O days.
`
`(21) Appl. No.: 16/398,655
`
`(22) Filed:
`
`Apr. 30, 2019
`
`(65)
`
`Prior Publication Data
`
`US 2019/0268920 Al
`
`Aug. 29, 2019
`
`Related U.S. Application Data
`
`application
`of
`(63) Continuation
`PCT/SE2018/050027, filed on Jan. 12, 2018.
`
`No.
`
`(51)
`
`Int. Cl.
`H04W 76127
`H04W72/12
`
`(2018.01)
`(2009.01)
`(Continued)
`
`(52) U.S. Cl.
`CPC ... H04W 7211257 (2013.01); H04W 7210446
`(2013.01); H04W 7211263 (2013.01);
`(Continued)
`( 58) Field of Classification Search
`CPC ............. H04W 76/27; H04W 72/0446; H04W
`72/1263; H04W 76/1257; H04W 88/021
`(Continued)
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`2013/0343318 Al* 12/2013 Gruet ...................... H04L 5/001
`370/329
`
`2016/0105905 Al
`
`4/2016 Vajapeyam et al.
`(Continued)
`
`FOREIGN PATENT DOCUMENTS
`
`WO
`
`2016048595 Al
`
`3/2016
`
`OTHER PUBLICATIONS
`
`International Search Report and Written Opinion dated Sep. 17,
`2018 for International Application No. PCT/SE2018/050027 filed
`Jan. 12, 2018 consisting of 15-pages.
`(Continued)
`
`Primary Examiner - Phong La
`(74) Attorney, Agent, or Firm - Christopher & Weisberg,
`P.A.
`
`ABSTRACT
`(57)
`There is disclosed a method of operating a user equipment
`in a radio access network. The user equipment is configured
`with a reference time resource available, in one or more
`slots, for transmission of a scheduling request by the user
`equipment, the reference time resource includes a reference
`symbol R, wherein each of the one or more slots has a slot
`duration that is based on a number N of symbols in the slot.
`The user equipment further is configured with a requesting
`periodicity P indicating a periodicity with a time period
`shorter than the slot duration. The method includes trans(cid:173)
`mitting a scheduling request message at a request transmis(cid:173)
`sion symbol T which is based on the reference symbol Rand
`the periodicity P. The disclosure also pertains to related
`methods and devices.
`
`8 Claims, 3 Drawing Sheets
`
`Automatically derived PUCCH resource
`
`Configured PUCCH resource
`
`SR periodic.
`
`SR periodic.
`
`Slot
`
`Slot
`
`time
`
`APPLE 1001
`
`1
`
`

`

`US 10,470,203 B2
`Page 2
`
`(51)
`
`(2009.01)
`(2009.01)
`(2009.01)
`
`Int. Cl.
`H04W 88/08
`H04W88/02
`H04W72/04
`(52) U.S. Cl.
`CPC ......... H04W 76127 (2018.02); H04W 881021
`(2013.01); H04W 88/08 (2013.01)
`( 58) Field of Classification Search
`USPC .......................................................... 370/329
`See application file for complete search history.
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`2018/0124815 Al*
`2018/0288746 Al*
`2018/0310257 Al*
`2019/0045529 Al*
`
`5/2018 Papasakellariou .... H04L 1/1671
`10/2018 Zhang ................... H04L 1/0031
`10/2018 Papasakellariou . H04W 52/30
`2/2019 Xiong
`H04W 72/1284
`
`2019/0053211 Al*
`2019/0109700 Al*
`2019/0174517 Al*
`2019/0190582 Al*
`2019/0208541 Al*
`2019/0215717 Al*
`
`H04W 72/042
`2/2019 Ying
`4/2019 Liu ..................... H04L 27/2613
`6/2019 Wang .................... H04L 5/0055
`6/2019 Guo
`H04B 7/0695
`7/2019 Lee
`H04W74/06
`7/2019 Lee
`H04W 28/0278
`
`OTHER PUBLICATIONS
`
`3GPP TSG RAN WG 1 Meeting 90bis Rl-1717396; Title: UL data
`transmission procedures in NR; Agenda Item: 7.3.3.4; Source: Intel
`Corporation; Document for: Discussion and Decision; Location and
`Date: Prague, Czech Republic, Oct. 9-13, 2017, consisting of
`12-pages.
`3GPP TSG RAN WGl Meeting #90bis Rl-1718647; Title: on UL
`Data Transmission Procedure; Agenda Item: 7.3 .3 .4; Source: Ericsson;
`Document for: Discussion and Decision; Location and Date: Prague,
`Czech Republic, Oct. 9-13, 2017, consisting of 10-pages.
`
`* cited by examiner
`
`2
`
`

`

`U.S. Patent
`
`Nov. 5, 2019
`
`Sheet 1 of 3
`
`US 10,470,203 B2
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`U.S. Patent
`U.S. Patent
`
`Nov. 5, 2019
`Nov. 5, 2019
`
`Sheet 2 of 3
`Sheet 2 of 3
`
`US 10,470,203 B2
`US 10,470,203 B2
`
`10
`10
`
`20
`
`22
`
`24
`
`Fig. 2
`
`4
`
`

`

`U.S. Patent
`U.S. Patent
`
`Nov. 5, 2019
`Nov. 5, 2019
`
`Sheet 3 of 3
`Sheet 3 of 3
`
`US 10,470,203 B2
`US 10,470,203 B2
`
`100
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`5
`
`

`

`US 10,470,203 B2
`
`1
`SCHEDULING REQUEST RESOURCE
`CONFIGURATION
`
`CROSS-REFERENCE TO RELATED
`APPLICATIONS
`
`This application is a continuation of International Appli(cid:173)
`cation No. PCT/SE2018/050027, filed Jan. 12, 2018, the
`entirety of which is incorporated herein by reference.
`
`TECHNICAL FIELD
`
`This disclosure pertains to wireless or telecommunication
`communication technology, in particular to radio access
`technology, e.g. for mobile communication.
`
`BACKGROUND
`
`Currently, radio telecommunication technology of 5th
`Generation is being developed, with the goal to serve a large
`variety of use cases. Thus, the development aims at provid(cid:173)
`ing systems with a high level of flexibility, which can lead
`to undesirable levels of ( control) signaling overhead. One
`type of control signaling is related to scheduling request, e.g.
`if a user equipment (UE) requests resources for transmis(cid:173)
`sion. The request itself has to be sent on resources, which
`have to be configured or otherwise indicated or reserved. In
`particular for low-latency applications, or other application
`requiring a high density of resources available for such
`requests, the signaling overhead can be significant.
`
`SUMMARY
`
`It is an object of this disclosure to provide approaches
`allowing efficient control signaling, in particular for han(cid:173)
`dling scheduling requests, e.g. transmission from a user
`equipment (UE) to a network (e.g., a network node) indi(cid:173)
`cating that the UE desires resources for uplink transmission.
`The approaches are particularly advantageously imple(cid:173)
`mented in a 5th Generation (5G) telecommunication net- 40
`work or 5G radio access technology or network (RAT/
`RAN), in particular according to 3GPP (3 rd Generation
`Partnership Project, a standardisation organization). A suit(cid:173)
`able RAN may in particular be a RAN according to NR, for
`example release 15 or later, or LTE Evolution.
`There is generally disclosed a method of operating a user
`equipment ( or, more generally, a first radio node) in a radio
`access network. The user equipment ( or first radio node) is
`configured with a reference time resource. The reference
`time resource is available in one or more slots for transmis- 50
`sion of a scheduling request by the user equipment. More(cid:173)
`over, the reference time resource comprises a reference
`symbol R, wherein each of the one or more slots has a slot
`duration that is based on a number N of symbols in the slot.
`The user equipment or first radio node further is configured 55
`with a requesting periodicity P indicating a periodicity with
`a time period shorter than the slot duration. The method
`comprises transmitting a scheduling request message at a
`request transmission symbol T which is based on the refer(cid:173)
`ence symbol R and the periodicity P.
`There is also considered a user equipment for a radio
`access network. The user equipment is configured with a
`reference time resource. The reference time resource is
`available, in one or more slots, for transmission of a sched(cid:173)
`uling request by the user equipment. The reference time
`resource comprises a reference symbol R, wherein each of
`the one or more slots has a slot duration that is based on a
`
`5
`
`2
`number N of symbols in the slot. The user equipment ( or first
`radio node) further is configured with a requesting period(cid:173)
`icity P, which indicates a periodicity with a time period
`shorter than the slot duration. The user equipment ( or first
`radio node) is adapted and/or configured for transmitting a
`scheduling request message at a request transmission sym(cid:173)
`bol T which is based on the reference symbol R and the
`periodicity P. The user equipment or first radio node may
`comprise, and/or be adapted for utilizing, processing cir-
`10 cuitry and/or radio circuitry, in particular a transmitter
`and/or receiver and/or transceiver, for transmitting and/or
`being configured and/or determining the request transmis(cid:173)
`sion symbol T. Alternatively, or additionally, the user equip(cid:173)
`ment or first radio node may comprise (e.g., have stored in
`15 memory), a corresponding transmitting module and/or con(cid:173)
`figuring module and/or determining module.
`A method of operating a radio node ( or a network node
`arrangement) in a radio access network is described. The
`method comprises configuring a user equipment or first
`20 radio node with a reference time resource. The reference
`time resource is available, in one or more slots, for trans(cid:173)
`mission of a scheduling request by the user equipment or
`first radio node. The reference time resource further com(cid:173)
`prises a reference symbol R, wherein each of the one or more
`25 slots has a slot duration that is based on a number N of
`symbols in the slot. The user equipment or first radio node
`also is configured (e.g., by the network, in particular the
`radio node or node arrangement) with a requesting period(cid:173)
`icity P indicating a periodicity with a time period shorter
`30 than the slot duration. The method comprises receiving a
`scheduling request message (e.g., from the user equipment
`or first radio node) at a reception symbol RC which is based
`on the reference symbol Rand the periodicity P. The method
`may also comprise scheduling the user equipment or first
`35 radio node based on the received scheduling request mes(cid:173)
`sage, e.g. for transmission on a data channel like a physical
`channel and/or shared channel, in particular a PUSCH or
`PSSCH.
`There is also proposed a radio node ( or a network node
`arrangement) for a radio access network. The radio node ( or
`network node arrangement) is adapted and/or configured for
`configuring a user equipment or first radio node with a
`reference time resource. The reference time resource is
`available, in one or more slots, for transmission of a sched-
`45 uling request by the user equipment or first radio node. The
`reference time resource comprises a reference symbol R,
`wherein each of the one or more slots has a slot duration that
`is based on a number N of symbols in the slot. The user
`equipment or first radio node is also configured ( e.g., by the
`network, in particular the radio node or node arrangement)
`with a requesting periodicity P indicating a periodicity with
`a time period shorter than the slot duration. Moreover, the
`radio node ( or network node arrangement) is adapted for
`receiving a scheduling request message (e.g., from the user
`equipment or first radio node) at a request reception symbol
`RC which is based on the reference symbol R and the
`periodicity P. The radio node ( or network node arrangement)
`may be adapted or configured for scheduling the user
`equipment or first radio node based on the received sched-
`60 uling request message, e.g. for transmission on a data
`channel like a physical channel and/or shared channel, in
`particular a PUSCH or PS SCH. The radio node ( or network
`node arrangement) may comprise, and/or be adapted for
`utilizing, processing circuitry and/or radio circuitry, in par-
`65 ticular a transmitter and/or receiver and/or transceiver, for
`configuring and/or receiving and/or scheduling. Alterna(cid:173)
`tively, or additionally, the radio node ( or network node
`
`6
`
`

`

`US 10,470,203 B2
`
`4
`3
`arrangement) may comprise a corresponding configuring
`a given slot periodicity. For more than one slot, the reference
`module and/or receiving module and/or scheduling module.
`symbol R may have the same number, such that in each of
`A radio node, in particular the first radio node, may be a
`the slots, at least the same-numbered reference symbol is
`user equipment or a network node. In some cases, the first
`available.
`radio node is a user equipment and/or the radio node is a 5
`The scheduling request, respectively corresponding sig(cid:173)
`network node. However, in some variants, e.g. a sidelink
`naling, may pertain to one carrier aggregation, and/or car(cid:173)
`scenario, the radio node may be a user equipment. In other
`rier, and/or bandwidth part, and/or one channel (e.g., physi(cid:173)
`variants, the first radio node may be a network node, e.g. in
`cal channel like PUSCH or PSSCH, or logical channel) or
`a relay and/or backhaul scenario.
`channel group (in particular logical channel group) or bearer
`The reference time resource may be associated to a 10
`( or bearer group). The scheduling request may be transmit(cid:173)
`time/frequency resource, e.g. a resource pool or resource
`ted on a specific channel, e.g. a control channel, which may
`region. It may be considered that the reference time resource
`be a physical control channel, e.g. a PUCCH or PSCCH,
`comprises or consists of one symbol (namely, the reference
`and/or which may be a contention-free channel. The channel
`symbol R), or one or more additional symbols, which may
`may be associated to the carrier aggregation and/or carrier,
`be consecutive in time. The duration (length in time) of the 15
`and/or bandwidth part, and/or one channel or channel group
`reference time resource may be shorter than the slot dura(cid:173)
`or bearer the scheduling request pertains to. A scheduling
`tion, and/or may comprise MR symbols in time. MR may be
`request may be considered to pertain to one of such struc(cid:173)
`equal to N, or shorter. In some variants, MR may be 1, or 2,
`tures if it indicates that resources are requested for trans-
`or 3, or 4 to 14. The reference symbol may indicate the start
`and/or a reference and/or duration in time of the reference 20 mission on the structure.
`Generally,
`transmitting ( or receiving) a scheduling
`time resource, e.g. in number of symbols.
`request message may comprise determining a set of symbols
`Configuring the reference time resource may comprise
`available for transmitting the request, based on the reference
`configuring, e.g. indicating, to the first radio node or user
`symbol Rand the periodicity P. Such determining may be for
`equipment to determine one or more available symbols
`( available for transmission of a scheduling request) based on
`25 each slot individually, or for a set of slots, e.g. with selecting
`the periodicity and the reference symbol. The corresponding
`I accordingly, or another method.
`behavior may be switched on or off via a configuration. This
`The reference symbol R may be configured for a starting
`slot, e.g. based on a slot offset. The starting slot may be the
`configuring may be with the same message that configures
`the reference time resource and/or reference symbol, or a
`first slot for which the reference symbol R is available. The
`30 starting slot may be predetermined (e.g., based on process(cid:173)
`different message.
`N may in some variants be 14, however, other variants
`ing time and/or a standard definition) and/or may be con(cid:173)
`may be considered. The symbols in a slot may be numbered
`figured or configurable, e.g. with higher layer signaling, e.g.
`with consecutive integers, e.g. from Oto N-1, in particular
`semi-static signaling and/or RRC signaling. The starting slot
`from Oto 13.
`may be configured as slot offset. In some variants, the
`The periodicity P may correspond to a time interval
`35 reference symbol R may be the first (in time) symbol
`shorter than the slot duration, in particular equal to or
`available for transmission of a scheduling request.
`smaller than half the slot duration (N/2). In some cases, P
`A scheduling request may indicate that a user equipment
`may correspond to 2 or 7 symbols, or a number of symbols
`or first radio node requests resources for transmission, e.g.
`in between. Generally, the periodicity may indicate a peri(cid:173)
`if it has data to transmit in a buffer. In some variants, the
`odicity of available resources for transmission of scheduling
`40 scheduling request may comprise buffer status information,
`requests. The reference symbol may be seen as an anchoring
`which may be indicative of the size of data and/or size range
`of data of one or more buffers. A buffer may correspond to
`symbol for a pattern defined by the periodicity, wherein the
`a channel, or a group of channels. A scheduling request may
`periodicity is on a time scale below a slot duration. Accord(cid:173)
`be carried by a scheduling request message.
`ingly, multiple available symbols (respectively, resources)
`may be provided or configured.
`Generally, a symbol available for scheduling requests
`The request transmission symbol may be associated to a
`may indicate or represent a range of symbols in which it is
`corresponding resource. Depending on the slot duration and
`included, over which a scheduling request may be transmit(cid:173)
`the periodicity, there may be at least two, or more than two,
`ted. Two symbols available for transmission of a scheduling
`possible or available request transmission symbols. The
`request in a slot may be separated by at least one symbol of
`reference symbol R may be considered as request transmis(cid:173)
`50 the slot, such that the available symbols may be non(cid:173)
`consecutive or interrupted. However, a range of symbols
`sion symbol. Generally, the request transmission symbol
`over which the scheduling request is transmitted at the
`may be determined and/or selected, e.g. by the user equip(cid:173)
`request transmission symbol T may be long enough to reach
`ment or first radio node, from the symbols of a slot that can
`to one or more other symbols available. It may be considered
`be addressed based on the periodicity P and the reference
`symbol R. In particular, a set may comprise the symbols of
`55 that for such available symbols, no scheduling request
`a slot numbered R+IxP, with I a positive or negative integer
`transmission is started, but an earlier transmission may
`or zero, such that the symbol is still in the slot. In some
`continue. A symbol available for transmission may indicate
`variants, the values for I may be positive to cross over to one
`a symbol in which the transmission may be started.
`It may be considered that in general, to each available
`or more consecutive slots ( of the more than one slots for
`which R is available). In this case, for each slot border
`60 symbol there is indicated and/or configured a time/frequency
`crossed, the symbol number may be reduced by the total
`resource and/or channel and/or transmission format (e.g., a
`number of symbols N in a slot. Alternatively, for each slot,
`message format), e.g. semi-statically, e.g. with RRC signal(cid:173)
`the available symbols can be as given with I limited to
`ing. Such configuring may be with the message that con(cid:173)
`represent symbol numbers in the slot only. If the reference
`figures the reference symbol, or with a different message. A
`symbol is available for more than one slot, the slots may be
`65 time/frequency resource may generally comprise one or
`consecutive in time, or in some cases interrupted by slots
`more resource elements, e.g. one or more symbols and one
`without R being available for scheduling requests, e.g. with
`or more associated subcarriers or physical resource blocks.
`
`45
`
`7
`
`

`

`US 10,470,203 B2
`
`6
`symbols available for transmission. Scheduling a first radio
`node or UE may comprise configuring it with scheduled
`resources, e.g. for data signaling, which may be on a data
`channel like a shared channel, e.g. PUSCH or PSSCH, or on
`5 a dedicated channel, which may for example be a low(cid:173)
`latency channel.
`A network node arrangement may comprise one or more
`radio nodes, in particular network nodes, which may be of
`the same or different types. Different nodes of the arrange-
`10 ment may be adapted for, and/or provide, different function(cid:173)
`alities described herein. A network node arrangement may in
`some variants represent a radio access network, and/or a
`heterogenous network (HetNet), and/or provide dual (or
`multiple) connectivity, e.g. comprising an anchor node and
`15 a booster node, and/or one or more of each or either. The
`radio nodes of a node arrangement may comprise suitable
`interfaces for communication between them, e.g. commu(cid:173)
`nication interfaces and/or corresponding circuitry.
`A system comprising a plurality of radio nodes as
`20 described herein, in particular a network node and one or
`more user equipments, may be considered.
`Signaling or a transmission may be considered to carry a
`message and/or information, if the message and/or informa(cid:173)
`tion is represented in the (modulated) waveform of the
`25 signaling. In particular, extraction of a message and/or
`information may require demodulation and/or decoding of
`the signaling. Information may be considered to be included
`in a message if the message comprises a value and/or
`parameter and/or bit field and/or indication or indicator
`30 representing the information, or more than one or a combi(cid:173)
`nation thereof. Information included in such a message may
`be considered to be carried by the signaling carrying the
`message, and vice versa.
`The approaches described herein allow efficient config-
`35 uring of resources for scheduling request, in particular for
`short periodicities, e.g. below slot duration. The first radio
`node or UE may determine the available symbols in a slot
`based on only one resource/reference symbol being config(cid:173)
`ured ( e.g., with corresponding signaling), limiting signaling
`40 overhead.
`The reference symbol may generally be configured
`directly, e.g. with indicating the symbol with an indicator, or
`indirectly, e.g. referring to a resource set, and/or table,
`and/or time/frequency resource.
`
`5
`The scheduling request message may be transmitted over
`one or more than one symbol, and/or the reference time
`resource comprises one or more than one symbols. The
`scheduling request message may in particular be a PUCCH
`or PS SCH message, e.g. a format O or format 1 ( or derivates
`thereof) message, and/or be transmitted over 1 symbol ( e.g.,
`format 0), or more than one symbol (e.g., 4 to 14, which may
`be configurable or configured, e.g. with the configuration of
`the reference time resource).
`In some variants, the scheduling request message may be
`a physical control channel message, e.g. a PUCCH or
`PSSCH message.
`The periodicity P and/or the reference symbol R may be
`semi-statically configured, and/or the periodicity P and/or
`the reference symbol R may be configured utilizing Radio
`Resource Control signaling.
`It may be considered that the periodicity P and the
`reference symbol R are configured with the same message,
`or with different messages. Different messages may be from
`different radio nodes, or from the same radio node.
`The request transmission symbol T may be earlier in a slot
`than the reference symbol R of the same slot. This may for
`example be for the starting slot, such that a scheduling
`request may be transmitted earlier than the first configured
`symbol R.
`It may be considered that the user equipment or first radio
`node is configured ( e.g., by the network, in particular the
`radio node) with a slot offset, the slot offset indicating a
`starting slot from which the reference time resource is
`available. Accordingly, position of the starting slot may be
`adapted to operation conditions and/or UE capabilities
`(which may, for example be signaled to the network, e.g. the
`radio node).
`The scheduling request message may comprise or repre(cid:173)
`sent 1 or 2 bits, which for example may be payload or
`information bits. In some variants, the message may com(cid:173)
`prise error coding bits, and/or repeat the payload or infor(cid:173)
`mation bit/s, e.g. if the message is transmitted over more
`than one symbol.
`Generally, 1 bit ( or more than one bit) of the scheduling
`request message may indicate whether the user equipment
`requests resources for transmission by the user equipment.
`There is also considered a program product comprising
`instructions adapted for causing processing circuitry to
`control and/or perform a method as described herein.
`Moreover, there is described a carrier medium arrange(cid:173)
`ment carrying and/or storing a program product as described
`herein.
`A corresponding information system comprising, and/or
`connected or connectable to a radio node as described herein 50
`may be considered.
`In general, a symbol available for transmission of a
`scheduling request may represent a possible or available
`starting symbol of such a transmission. Accordingly, a
`transmission of a scheduling request transmitted at a request 55
`transmission symbol may start at the request transmission
`symbol.
`A request reception symbol may be based on the request
`transmission symbol and a signaling time. Receiving the
`scheduling request message may comprise, and/or be based 60
`on, determining the request reception symbol accordingly. It
`should be noted that receiving may comprise associating a
`received transmission on the request reception symbol (and/
`or associated time/frequency resource) with a scheduling
`request message and/or the first radio node ( or UE). Receiv- 65
`ing may generally comprise listening for a scheduling
`request message at reception symbols corresponding to
`
`45
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`The drawings are provided to illustrate concepts and
`approaches described herein, and are not intended to limit
`their scope. The drawings comprise:
`FIG. 1, showing symbols available for scheduling
`requests;
`FIG. 2, showing an exemplary radio node implemented as
`a user equipment; and
`FIG. 3, showing an exemplary radio node implemented as
`a network node.
`
`DETAILED DESCRIPTION
`
`In the following, approaches are described for illustrative
`purposes in the context of NR RAT. However, they are
`generally applicable with other technologies. Also, commu(cid:173)
`nication in uplink and downlink between a signaling radio
`node like a network node and a radio node like a UE is
`described by way of example. The approaches should not be
`construed to be limited to such communication, but can also
`be applied for sidelink or backhaul or relay communication.
`
`8
`
`

`

`US 10,470,203 B2
`
`7
`For ease of reference, in some cases 1t 1s referred to a
`channel to represent signaling or transmission on the chan(cid:173)
`nel. A PUSCH may represent uplink data signaling, a
`PDSCH downlink data signaling, a PDCCH downlink con(cid:173)
`trol signaling (in particular, one or more DCI messages like
`scheduling assignnients or grants), a PUCCH uplink control
`signaling, in particular signaling of UCL A scheduling
`request message may in some cases be a message only
`carrying, as payload or information, a scheduling request
`(e.g., 1 bit), or at most one additional bit. However, in some
`cases, the message may also comprise additional payload,
`e.g. additional control information, e.g. feedback informa(cid:173)
`tion (for example, HARQ acknowledgement information
`like ACK/NACK) and/or measurement reporting informa(cid:173)
`tion, e.g. channel state information and/or beamforming
`information. In addition to bits representing payload infor(cid:173)
`mation, the message may comprise error coding bits.
`FIG. 1 shows configuration for scheduling requests. Sev(cid:173)
`eral consecutive slots are shown, each of which has a slot
`duration based on a number of symbols in the slot, e.g. 14,
`or 12, or a different number (for NR, it may be 14). For each
`slot, there is configured a reference time resource for a
`scheduling request (SR), which is referred to as configured
`PUCCH resource for SR. This may be configured with RRC
`signaling and/or semi-statically. A reference symbol R is
`associated to this resource and configured implicitly or
`explicitly with the resource. It should be noted that the
`resource may extend over more than one symbol in time.
`There is also configured a periodicity P for scheduling
`requests SR, which corresponds to a period shorter than the
`slot duration, e.g. to a number of symbols fewer than the
`symbols of the slot. The other available symbols (and/or
`associated resources or symbol ranges) in a slot may be
`determined, e.g. automatically, by the UE or network node
`(for reception or scheduling). It may be considered that a
`PUCCH resource configured for SR has starting symbol SsR
`within a slot, which may be the reference symbol. The SR
`periodicity may be P=LsR, with LsR for example 2 or 7
`symbols, or another value, in particular between 2 and 7. In
`total, per slot, the following PUCCH resources for SR are
`defined with start positions SsR n =SsR 0 +n·LsR, with
`SsR.o=mod(SsR,LsR) and
`·
`·
`
`L
`n = 0, 1, ... LsR -1
`
`with L the slot length in symbols. For the starting slot, it may
`be configured or configurable, or predetermined, whether
`any start positions ( corresponding to available symbols)
`earlier than the reference symbol are available.
`The resource/s associated to an available symbol may in
`general be associated to control signaling and/or a control
`channel,
`in particular a physical control channel like
`PUCCH or PSCCH, and/or may be associated to control
`information in general (e.g., UCI and/or SCI), or to sched(cid:173)
`uling request specifically. A format for transmission may be
`configured to the resource and/or scheduling request, e.g. a
`format that has a payload size or 1 or 2 bits, like format 0
`or 1 ( or derivates thereof).
`FIG. 2 schematically shows a radio node, in particular a
`terminal or wireless device 10, which may in particular be
`implemented as a UE (User Equipment). Radio node 10
`comprises processing circuitry (which may also be referred
`to as control circuitry) 20, which may comprise a controller
`connected to a memory. Any module of the radio node 10,
`
`5
`
`8
`e.g. a communicating module or determining module, may
`be implemented in and/or executable by, the processing
`circuitry 20, in particular as module in the controller. Radio
`node 10 also comprises radio circuitry 22 providing receiv-
`ing and transmitting or transceiving functionality ( e.g., one
`or more transmitters and/or receivers and/or transceivers),
`the radio circuitry 22 being connected or connectable to the
`processing circuitry. An antenna circuitry 24 of the radio
`node 10 is connected or connectable to the radio circuitry 22
`10 to collect or send and/or amplify signals. Radio circuitry 22
`and the processing circuitry 20 controlling it are configured
`for cellular communication with a network, e.g. a RAN as
`described herein, and/or for sidelink communication. Radio
`node 10 may generally be adapted to carry out any of the
`15 methods of operating a radio node like terminal or UE
`disclosed herein; in particular, it may comprise correspond(cid:173)
`ing circuitry, e.g. processing circuitry, and/or modules.
`FIG. 3 schematically show a radio node 100, which may
`in particular be implemented as a network node 100, for
`20 example an eNB or gNB or similar for NR. Radio node 100
`comprises processing circuitry (which may also be referred
`to as control circuitry) 120, which may comprise a controller
`connected to a memory. Any module, e.g. transmitting
`module and/or receiving module and/or configuring module
`25 of the node 100 may be implemented in and/or executable by
`the processing circuitry 120. The processing circuitry 120 is
`connected to control radio circuitry 122 of the node 100,
`which provides receiver and transmitter and/or transceiver
`functionality ( e.g., comprising one or more transmitters
`30 and/or receivers and/or transceivers). An antenna circuitry
`124 may be connected or connectable to radio circuitry 122
`for sign