I 1111111111111111 1111111111 11111 lllll 111111111111111 11111 lll111111111111111
`US011051235B2
`
`c12) United States Patent
`Sharma et al.
`
`US 11,051,235 B2
`(IO) Patent No.:
`Jun.29,2021
`(45) Date of Patent:
`
`(54) WIRELESS TELECOMMUNICATIONS
`APPARATUSES AND METHODS
`
`(71) Applicant: Sony Corporation, Tokyo (JP)
`
`(72)
`
`Inventors: Vivek Sharma, Basingstoke (GB);
`Brian Alexander Martin, Basingstoke
`(GB); Yuxin Wei, Basingstoke (GB);
`Hideji Wakabayashi, Basingstoke
`(GB); Shinichiro Tsuda, Basingstoke
`(GB)
`
`(73) Assignee: SONY CORPORATION, Tokyo (JP)
`
`( *) Notice:
`
`Subject to any disclaimer, the term ofthis
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 103 days.
`
`(21) Appl. No.:
`
`16/344,805
`
`(22) PCT Filed:
`
`Oct. 3, 2017
`
`(86) PCT No.:
`
`PCT/EP2017/075068
`
`§ 371 (c)(l),
`(2) Date:
`
`Apr. 25, 2019
`
`(87) PCT Pub. No.: WO2018/082849
`
`PCT Pub. Date: May 11, 2018
`
`(65)
`
`Prior Publication Data
`
`US 2019/0297563 Al
`
`Sep. 26, 2019
`
`(30)
`
`Foreign Application Priority Data
`
`Nov. 3, 2016
`
`(EP) ..................................... 16197185
`
`(51)
`
`Int. Cl.
`H04W 48112
`H04W 76118
`
`(2009.01)
`(2018.01)
`(Continued)
`
`(52) U.S. Cl.
`CPC ........... H04W 48112 (2013.01); H04W 36122
`(2013.01); H04W 48106 (2013.01); H04W
`76118 (2018.02)
`
`(58) Field of Classification Search
`None
`See application file for complete search history.
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`7,899,441 B2 * 3/2011 Zhang ..................... H04L 63/08
`455/411
`H04W 48/12
`
`10,694,404 B2 * 6/2020 Chandramouli
`(Continued)
`
`FOREIGN PATENT DOCUMENTS
`
`WO
`
`2013/102801 Al
`
`7/2013
`
`OTHER PUBLICATIONS
`
`Office Action dated Mar. 4, 2020 in European Patent Application
`No. 17 778 272.9, 12 pages.
`(Continued)
`
`Primary Examiner - Bunjob Jaroenchonwanit
`(74) Attorney, Agent, or Firm -Xsensus LLP
`
`ABSTRACT
`(57)
`A method of transmitting system information in a mobile
`communications network, the network comprising a base
`station operable to provide a cell to communicate wirelessly
`with a plurality of mobile terminals and a mobile terminal of
`the plurality of mobile terminals, the mobile terminal being
`operable to communicate with the base station. The method
`comprises periodically transmitting essential system infor(cid:173)
`mation "ESI" to the plurality of mobile terminals, the ESI
`comprising system information for using the cell provided
`by the base station; transmitting additional system informa(cid:173)
`tion "ASI" to the mobile terminal, the ASI comprising
`system information for using one or more services provided
`by the cell. In the event that it is determined that the base
`station is overloaded, the method further comprises trans(cid:173)
`mitting a service notification that the cell is currently unable
`to provide the one or more services.
`
`20 Claims, 4 Drawing Sheets
`
`S401: periodically transmitting ESI to plurality of
`mobile terminals
`
`S402: transmitting ASI to mobile terminal
`
`t-N_O ____ ~
`
`S403: base station is
`overloaded?
`
`YES
`
`S404: transmitting a service notification that the
`cell is currently unable to provide the one or more
`services.
`
`Ex.1010
`APPLE INC. / Page 1 of 16
`
`

`

`US 11,051,235 B2
`Page 2
`
`(51)
`
`Int. Cl.
`H04W36/22
`H04W 48106
`
`(2009.01)
`(2009.01)
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`2005/0185917 Al*
`
`8/2005 Andrzej
`
`2008/0214186 Al*
`
`9/2008 Bizzarri
`
`2008/0235701 Al*
`
`2010/0077088 Al*
`
`H04N 21/4542
`386/218
`H04W 24/00
`455/425
`9/2008 Danko .................. G06F 9/4881
`718/104
`3/2010 Hyun ...................... H04L 12/66
`709/228
`2010/0274893 Al* 10/2010 Abdelal .................. H04L47/10
`709/224
`H04W 48/18
`455/406
`G06Q 30/02
`348/143
`4/2013 Estes . . . . . . . . . . . . . . . . . . . G06F 11/3006
`709/207
`
`2012/0058742 Al*
`
`3/2012 Razoumov.
`
`2012/0092492 Al*
`
`4/2012 Carbonell
`
`2013/0086194 Al*
`
`2/2014 Koskinen et al.
`2014/0056134 Al
`9/2014 Jun et al.
`2014/0269275 Al
`2014/0295791 Al* 10/2014 Cai
`
`2015/0100629 Al*
`
`H04M 15/85
`455/406
`4/2015 Bae ......................... H04L 67/42
`709/203
`2015/0289312 Al* 10/2015 Ranta ...................... H04L 69/22
`370/328
`
`2015/0312352 Al* 10/2015 Shamilian ............... H04L 69/30
`726/6
`H04W 24/10
`H04W 48/12
`H04W36/14
`H04W 48/10
`H04W 68/005
`H04W 74/0833
`
`2017/0111406 Al*
`4/2017 Ionescu .
`2018/0013524 Al*
`1/2018 Chien
`2018/0092085 Al *
`3/2018 Shaheen
`2018/0103418 Al*
`4/2018 Aghili .
`2019/0306661 Al* 10/2019 Deluca.
`2020/0146075 Al*
`5/2020 Agiwal
`
`OTHER PUBLICATIONS
`
`International Search Report and Written Opinion dated Nov. 24,
`2017 for PCT/EP20171075068 filed on Oct. 3, 2017, 17 pages.
`Intel Corporation, "System information for standalone NR deploy(cid:173)
`ment", 3GPP TSG-RAN WG2 Meeting No. 95bis Rl-166885,
`Kaohsiung, Oct. 10-14, 2016, pp. 1-5.
`Holma et al., "LTE for UMTS", OFDMA and SC-FDMA Based
`Radio Access, System Architecture based on 3GPP SAE, 2009, 11
`pages.
`Acbop, "Update for "potential technical solutions" in section 6 of
`TR23.898", 3GPPTSG-SA WG2 Meeting No. 41 Tdoc S2-042910,
`Montreal, Canada, Aug. 16-20, 2004, pp. 1-9.
`Sharp, "Latency and Overload Issues for MTC Devices", 3GPP
`TSG-RAN WG2#71 Rl-104348 Madrid, Spain, Aug. 23-27, 2010,
`pp. 1-3.
`Huawei et al., Delivery of "Other SI" in NR, 3GPP TSG-RAN2
`Meeting No. 95bis Rl-166203, Kaohsiung Oct. 10-14, 2016, 5
`pages.
`Nokia et al., "Distribution of System Information in NR", 3GPP
`TSG-RAN WG2 Meeting No. 95bis Rl-167039 Kaohsiung, Tai(cid:173)
`wan, Oct. 10-14, 2016, 5 pages.
`
`* cited by examiner
`
`Ex.1010
`APPLE INC. / Page 2 of 16
`
`

`

`U.S. Patent
`
`Jun.29,2021
`
`Sheet 1 of 4
`
`US 11,051,235 B2
`
`100
`~
`
`103
`
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`1
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`
`102
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`.... ....
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`I
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`
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`STATION
`
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`
`\ @ 101
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`' ' ' ' ....
`........ --------
`FIG. 1
`Background Art
`
`Ex.1010
`APPLE INC. / Page 3 of 16
`
`

`

`U.S. Patent
`
`Jun.29,2021
`
`Sheet 2 of 4
`
`US 11,051,235 B2
`
`500
`')
`
`\V
`
`504
`;
`
`512
`
`508a
`
`508
`
`FIG. 2
`
`Background Art
`
`Ex.1010
`APPLE INC. / Page 4 of 16
`
`

`

`U.S. Patent
`
`Jun.29,2021
`
`Sheet 3 of 4
`
`US 11,051,235 B2
`
`SI windows
`(broadcast)
`
`I
`
`I ...
`
`I oi
`I
`I
`
`UE1 ... UE5
`
`SI Request
`Window
`
`UE1
`
`UE2
`
`SI Request
`Window
`
`SI transmission
`(in dedicated manner)
`
`FIG. 3
`
`Background Art
`
`Ex.1010
`APPLE INC. / Page 5 of 16
`
`

`

`U.S. Patent
`
`Jun.29,2021
`
`Sheet 4 of 4
`
`US 11,051,235 B2
`
`S401: periodically transmitting ESI to plurality of
`mobile terminals
`
`S402: transmitting ASI to mobile terminal
`
`S403: base station is
`overloaded?
`
`NO
`
`YES
`
`S404: transmitting a service notification that the
`cell is currently unable to provide the one or more
`services.
`
`FIG. 4
`
`Ex.1010
`APPLE INC. / Page 6 of 16
`
`

`

`US 11,051,235 B2
`
`1
`WIRELESS TELECOMMUNICATIONS
`APPARATUSES AND METHODS
`
`CROSS-REFERENCE TO RELATED
`APPLICATION
`
`The present application is based on PCT filing PCT/
`EP2017/075068 filed Oct. 3, 2017, which claims priority to
`EP 16197185.8 filed Nov. 3, 2016, the entire contents of
`each are incorporated herein by reference.
`
`BACKGROUND
`
`Field
`
`The present disclosure relates to wireless telecommuni(cid:173)
`cations apparatus and methods.
`
`Description of Related Art
`
`5
`
`2
`In view of this there is expected to be a desire for future
`wireless communications networks, for example those
`which may be referred to as 5G or new radio (NR) system/
`new radio access technology (RAT) systems, as well as
`future iterations/releases of existing systems, to efficiently
`support connectivity for a wide range of devices associated
`with different applications and different characteristic data
`traffic profiles.
`For a wireless telecommunications system to efficiently
`10 support terminal devices of different types having different
`capabilities and communicating different types of data, the
`network infrastructure needs to know the relevant charac(cid:173)
`teristics of the terminal devices' operation-i.e. the charac(cid:173)
`teristics which may impact how communications with the
`15 terminal device should be handled to improve efficiency. In
`this regard the relevant characteristics of a terminal device's
`operation may be broadly considered to fall into two cat(cid:173)
`egories of information.
`A first category, which may be referred to herein as
`20 capability information, includes information which relates to
`the fundamental ability of the terminal device to access the
`radio network, for example in terms of the radio access
`technologies it supports, its operating bandwidth and fre(cid:173)
`quencies, MIMO support, carrier aggregation support, and
`25 so on. Capability information may thus broadly be consid(cid:173)
`ered to relate to characteristics of the device which are
`generally set by hardware and which determine how the
`terminal device can access the physical layer. The use of
`such capability information in configuring communications
`30 in wireless telecommunications systems is well established.
`A second category of information, which may be referred
`to herein as application information or device context infor(cid:173)
`mation, includes information which relates to higher-layer
`operations of the terminal device (i.e. layers higher than the
`35 physical later), for example including information relating to
`software applications the device supports/is currently run(cid:173)
`ning, and the nature of the device and how it is being used,
`for example in terms of whether the device is a static device,
`a mobile device, a wearable device, and so on. Application
`40 information/device context information may thus be consid(cid:173)
`ered to include information representing parameters/charac(cid:173)
`teristics that relate to a current mode of operation for a
`mobile device, its environment and mobility, and other
`information which is separate from the capability informa-
`45 tion relating to how the terminal device may physically
`access the radio interface.
`In conventional wireless telecommunications networks,
`such as LTE-based networks, it is known for a base station
`to transmit system information such that terminals can
`50 access and use the cell that it provides. With a number of
`new services having been introduced in the latest releases of
`standards, it has been proposed that the base station would
`also transmit, on demand, additional system information
`regarding the services provided in the cell. However, in an
`55 LTE environment, in a case when the base station/cell has
`already a high load, it may not be able to provide the same
`level of services and current proposals for assisting an
`overloaded base station are only of limited use.
`
`The "background" description provided herein is for the
`purpose of generally presenting the context of the disclo(cid:173)
`sure. Work of the presently named inventors, to the extent it
`is described in this background section, as well as aspects of
`the description which may not otherwise qualify as prior art
`at the time of filing, are neither expressly or impliedly
`admitted as prior art against the present invention.
`Third and fourth generation mobile telecommunication
`systems, such as those based on the 3GPP defined UMTS
`and Long Term Evolution (LTE) architecture, are able to
`support more sophisticated services than simple voice and
`messaging services offered by previous generations of
`mobile telecommunication systems. For example, with the
`improved radio interface and enhanced data rates provided
`by LTE systems, a user is able to enjoy high data rate
`applications such as mobile video streaming and mobile
`video conferencing that would previously only have been
`available via a fixed line data connection. The demand to
`deploy third and fourth generation networks is therefore
`strong and the coverage area of these networks, i.e. geo(cid:173)
`graphic locations where access to the networks is possible,
`is expected to increase rapidly.
`Future wireless communications networks will be
`expected to efficiently support communications with a wider
`range of devices associated with a wider range of data traffic
`profiles and types than current systems are optimised to
`support. For example it is expected future wireless commu(cid:173)
`nications networks will be expected to efficiently support
`communications with devices including reduced complexity
`devices, machine type communication devices, high reso(cid:173)
`lution video displays, virtual reality headsets and so on.
`Some of these different types of devices may be deployed in
`very large numbers, for example low complexity devices for
`supporting the "The Internet of Things", and may typically
`be associated with the transmissions of relatively small
`amounts of data with relatively high latency tolerance,
`whereas other types of device, for example supporting
`high-definition video streaming, may be associated with
`transmissions of relatively large amounts of data with rela(cid:173)
`tively low latency tolerance. A single device type might also 60
`be associated with different traffic profiles depending on the
`applications it is running. For example, different consider(cid:173)
`ation may apply for efficiently supporting data exchange
`with a smartphone when it is running a video streaming
`application (high downlink data) as compared to when it is 65
`running an Internet browsing application (sporadic uplink
`and downlink data).
`
`SUMMARY
`
`The present disclosure can help address or mitigate at
`least some of the issues discussed above.
`Respective aspects and features of the present disclosure
`are defined in the appended claims.
`It is to be understood that both the foregoing general
`description and the following detailed description are exem-
`
`Ex.1010
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`

`US 11,051,235 B2
`
`3
`plary, but are not restrictive, of the present technology. The
`described embodiments, together with further advantages,
`will be best understood by reference to the following
`detailed description taken in conjunction with the accom(cid:173)
`panying drawings.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`A more complete appreciation of the disclosure and many
`of the attendant advantages thereof will be readily obtained
`as the same becomes better understood by reference to the
`following detailed description when considered in connec(cid:173)
`tion with the accompanying drawings wherein like reference
`numerals designate
`identical or corresponding parts
`throughout the several views, and wherein:
`FIG. 1 schematically represents some aspects of a LTE(cid:173)
`type wireless telecommunication network which may be
`configured to operate in accordance with certain embodi(cid:173)
`ments of the present disclosure;
`FIG. 2 schematically represents some aspects of a wire- 20
`less telecommunications network configured to operate in
`accordance with certain embodiments of the present disclo(cid:173)
`sure;
`FIG. 3 schematically represents some aspects of a wire(cid:173)
`less telecommunications network configured to transmit
`system information to terminals; and
`FIG. 4 schematically represents some aspects of method
`for use in a wireless telecommunications network.
`
`4
`ment of the present disclosure. The telecommunications
`system 500 in this example is based broadly around an
`LTE-type architecture and the telecommunications system
`may also support other radio access technologies, either
`5 using the same hardware as represented in FIG. 2 with
`appropriately configured functionality or separate hardware
`configured to operate in association with the hardware
`represented in FIG. 2. Many aspects of the operation of the
`telecommunications system/network 500 are known and
`10 understood and are not described here in detail in the interest
`of brevity. Operational aspects of the telecommunications
`system 500 which are not specifically described herein may
`be implemented in accordance with any known techniques,
`for example according to the current LTE-standards and
`15 other proposals for operating wireless telecommunications
`systems.
`The telecommunications system 500 comprises a core
`network part ( evolved packet core) 502 coupled to a radio
`network part. The radio network part comprises a base
`station (evolved-nodeB) 504 coupled to a terminal device
`508. In this example, only one base station 504 and one
`terminal device 508 are represented in FIG. 2. However, it
`will of course be appreciated that in practice the radio
`network part will typically comprise a plurality of base
`25 stations serving a larger number of terminal devices across
`various communication cells, as well as potentially includ(cid:173)
`ing transceiver stations supporting radio communications
`with terminal devices on cells operating in accordance with
`other radio access technologies, such as UTRAN, GERAN,
`30 WLAN or a 5G new RAT. However, only a single base
`station and terminal device are shown in FIG. 2 in the
`interests of simplicity.
`The terminal device 508 is arranged to communicate data
`to and from the base station (transceiver station) 504. The
`35 base station is in tum communicatively connected to a
`serving gateway, S-GW, (not shown) in the core network
`part which is arranged to perform routing and management
`of mobile communications services to the terminal device in
`the telecommunications system 500 via the base station 504.
`40 In order to maintain mobility management and connectivity,
`the core network part 502 also includes a mobility manage(cid:173)
`ment entity, MME, (not shown) which manages the
`enhanced packet service, EPS, connections with the terminal
`device 508 operating in the communications system based
`45 on subscriber information stored in a home subscriber
`server, HSS. Other network components in the core network
`(also not shown for simplicity) include a policy charging and
`resource function, PCRF, and a packet data network gate(cid:173)
`way, PDN-GW, which provides a connection from the core
`50 network part 502 to an external packet data network, for
`example the Internet. As noted above, the operation of the
`various elements of the communications system 500 shown
`in FIG. 2 may be conventional apart from where modified to
`provide functionality in accordance with embodiments of
`the present disclosure as discussed herein. It will be appre(cid:173)
`ciated embodiments of the invention may in general be
`implemented in wireless communications systems operating
`in accordance with different radio access technologies, for
`example, who one or more ofUTRAN, GERAN, WLAN or
`60 a 5G new RAT (NR) networks, and these other radio access
`technologies will not necessarily incorporate the same net(cid:173)
`work infrastructure components as for an LTE implementa(cid:173)
`tion ( e.g. there may be no serving gateway in new RAT
`networks).
`The terminal device 508 is adapted to support operations
`in accordance with embodiments of the present disclosure
`when communicating with the base station 504 as discussed
`
`DETAILED DESCRIPTION OF THE
`EMBODIMENTS
`
`FIG. 1 provides a schematic diagram illustrating some
`basic functionality of a mobile telecommunications net(cid:173)
`work/system 100 operating generally in accordance with
`LTE principles but which may also support other radio
`access technologies and which may implement embodi(cid:173)
`ments of the disclosure as described herein. Various ele(cid:173)
`ments of FIG. 1 and their respective modes of operation are
`well-known and defined in the relevant standards adminis(cid:173)
`tered by the 3GPP (RTM) body, and also described in many
`books on the subject, for example, Halma H. and Toskala A
`[1]. It will be appreciated that operational aspects of the
`telecommunications network which are not specifically
`described below may be implemented in accordance with
`any known techniques, for example according to the rel(cid:173)
`evant standards and previously proposed modifications and
`additions to the relevant standards.
`The network 100 includes a plurality of base stations 101
`connected to a core network 102. Each base station provides
`a coverage area 103 (i.e. a cell) within which data can be
`communicated to and from terminal devices 104. Data is
`transmitted from base stations 101 to terminal devices 104
`within their respective coverage areas 103 via a radio
`downlink. Data is transmitted from terminal devices 104 to 55
`the base stations 101 via a radio uplink. The core network
`102 routes data to and from the terminal devices 104 via the
`respective base stations 101 and provides functions such as
`authentication, mobility management, charging and so on.
`Terminal devices may also be referred to as mobile stations,
`user equipment (UE), user terminal, mobile radio, commu(cid:173)
`nications device, and so forth. Base stations, which are an
`example of network infrastructure equipment, may also be
`referred to as transceiver stations/nodeBs/e-nodeBs, and so
`forth.
`FIG. 2 schematically shows some further details of a
`telecommunications system 500 according to an embodi-
`
`65
`
`Ex.1010
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`

`US 11,051,235 B2
`
`5
`further herein. The terminal device 508 comprises trans(cid:173)
`ceiver circuitry 508a (which may also be referred to as a
`transceiver/transceiver unit) for transmission and reception
`of wireless signals and processor circuitry 508b (which may
`also be referred to as a processor/processor unit) configured
`to control the terminal device 508. The processor circuitry
`508b may comprise various sub-units/sub-circuits for pro(cid:173)
`viding functionality in accordance with embodiments of the
`present disclosure as described herein. These sub-units may
`be implemented as discrete hardware elements or as appro- 10
`priately configured functions of the processor circuitry. Thus
`the processor circuitry 508b may comprise circuitry which is
`suitably configured/programmed to provide the desired
`functionality described herein using conventional program(cid:173)
`ming/configuration techniques for equipment in wireless 15
`telecommunications systems. The transceiver circuitry 508a
`and the processor circuitry 508a are schematically shown in
`FIG. 2 as separate elements for ease of representation.
`However, it will be appreciated that the functionality of
`these circuitry elements can be provided in various different 20
`ways, for example using one or more suitably programmed
`programmable computer(s), or one or more suitably config(cid:173)
`ured application-specific
`integrated circuit( s )/circuitry/
`chip(s)/chipset(s). It will be appreciated the terminal device
`508 will in general comprise various other elements asso- 25
`ciated with its operating functionality, for example a power
`source, user interface, and so forth, but these are not shown
`in FIG. 2 in the interests of simplicity.
`The base station 504 comprises transceiver circuitry 504a
`(which may also be referred to as a transceiver/transceiver 30
`unit) for transmission and reception of wireless signals and
`processor circuitry 504b (which may also be referred to as
`a processor/processor unit) configured to control the base
`station 504 to operate in accordance with embodiments of
`the present disclosure as described herein. The processor 35
`circuitry 504b may again comprise various sub-units, such
`as a scheduling unit, for providing functionality in accor(cid:173)
`dance with embodiments of the present disclosure as
`explained further below. These sub-units may be imple(cid:173)
`mented as discrete hardware elements or as appropriately 40
`configured functions of the processor circuitry. Thus, the
`processor circuitry 504b may comprise circuitry which is
`suitably configured/programmed to provide the desired
`functionality described herein using conventional program(cid:173)
`ming/configuration techniques for equipment in wireless 45
`telecommunications systems. The transceiver circuitry 504a
`and the processor circuitry 504b are schematically shown in
`FIG. 2 as separate elements for ease of representation.
`However, it will be appreciated that the functionality of
`these circuitry elements can be provided in various different 50
`ways, for example using one or more suitably programmed
`programmable computer(s), or one or more suitably config(cid:173)
`ured application-specific
`integrated circuit( s )/circuitry/
`chip(s)/chipset(s). It will be appreciated the base station 504
`will in general comprise various other elements associated 55
`with its operating functionality, such as a scheduler. For
`example, although not shown in FIG. 2 for simplicity, the
`processor circuitry 504b may comprise scheduling circuitry,
`that is to say the processor circuitry 504b may be configured/
`programmed to provide the scheduling function for the base 60
`station 504.
`In current developments, there has been proposals made
`for the base station to transmit, in additional to the essential
`system information (that terminals have to obtain before
`they can use the cell provided by the base station), "other 65
`system information" or "other SI" for providing information
`to terminals about additional services that may be available
`
`6
`in the cell. While the essential SI ("ESI" herein) is always
`transmitted when the cell is campable, the other SI is only
`transmitted when required, that is on demand from termi(cid:173)
`nals. Other SI will also be referred to herein as "additional
`5 SI" or "ASI" for brevity. In this context, at the RAN2 #95bis
`meeting the following three objectives have been agreed:
`1: For on demand SI, other Sis may be broadcasted at
`configurable periodicity ( equivalent to SI period in
`LTE) and for a certain duration.
`2: Request of the other SI by idle and "new state" UE
`should be performed without state transition.
`3: For an SI required by the UE, the UE should know
`whether it is available in the cell and whether it is
`broadcast or not before it sends the other SI request
`(e.g. by checking minimum SI).
`The agreements above are for allowing ASI to be sent
`on-demand following a request from a UE. Before sending
`the request, UE should know whether a certain SIB is
`available in the cell. Based on these agreements and discus(cid:173)
`sions, one scheme proposed is that of R2-166203, as illus(cid:173)
`trated with respect to FIG. 3.
`In the scheme illustrated in FIG. 3, a UE can send a
`request for ASI wherein the request has to be send within SI
`request window. The network can then decides to deliver the
`SI either via broadcast or dedicated signalling as shown in
`the two alternatives of FIG. 3. Accordingly the ASI is then
`simply delivered to terminal upon request.
`With a view to achieving agreement #2 above, using
`Random Access "RA" preamble for the request appears the
`most likely option for determining a way of requesting the
`SI. The UE can then wait for a configurable period of time,
`namely the SI response window, to send the RA preamble.
`Finally, when looking at the agreement #3, this allows the
`UE to send a request ( e.g. a RA preamble) after checking the
`essential SI which should include information about other SI
`scheduling. Some companies proposed to use a bitmap for
`availability of each SI transmitted as "Other SI". For
`example the ESI could indicate that ASI is available for a
`first service but is not available for a second service.
`However, if network is overloaded or congested, then the
`transmission of ASI may have the effect of further increasing
`the load of the base station which would be unfortunate. One
`solution could be to decide that network reserves enough
`resources in advance (like LTE) for system information
`broadcast. This has been proposed in R2-166885 where it is
`suggested that "When system load is high, it is preferred to
`switch back to always-broadcast delivery, without allowing
`UE to request other SI".
`While this would reduce the signaling overhead, this
`proposal remains unsatisfactory as the system is more likely
`to be overloaded in the downlink, rather than in the uplink.
`Therefore the savings made with this solution, in uplink
`resources for requesting the ASI, would most likely only
`have a limited impact on reducing the load of the base
`station. For example, there may be only a single signature
`( or a single signature per SIB type) from RA preamble
`resources being used to request the ASI and RA resources
`will always be transmitted even during the overload (UEs
`shall be able to perform RA procedure as usual even when
`the cell is overloaded). As a result, a UE can still request the
`ASI when the base station is overloaded and such requests
`are not resource consuming.
`On the other hand, switching back to always-broadcast
`delivery as proposed will result in the network reserving SI
`resources in advance and therefore increasing the load of the
`cell. Also, the overheads due to beamforming also need to be
`considered such that the effect of this modification would be
`
`Ex.1010
`APPLE INC. / Page 9 of 16
`
`

`

`US 11,051,235 B2
`
`7
`even stronger in 5G with beamforming than in LTE. Also,
`due to the overload, it may not be possible for network or
`cell to serve these UEs anyway. Another aspect to consider
`is that UE will request other system information ("ASI")
`only if it is interested in starting to use the corresponding 5
`service. For example, the UE will only request MBMS SIBs
`if it is actually interested in using MBMS services.
`Below is a list of system information currently available
`in LTE excluding cell reselection SIBs 3,4,5,6, 7 which
`could be part of "Other SI":
`
`8
`accommodate new UE requests for features in "Other
`SI" like e.g. D2D/MBMS via dedicated signalling. It is
`assumed that essential SI does not include scheduling/
`availability information for these SIBs. The base sta(cid:173)
`tion can then broadcast, e.g. by broadcasting SIB2, that
`access to "Other SI" for this UE /group/all UEs is
`barred.
`Accordingly, if the UE wants to access specifically this
`service, the UE does not send an ASI request and
`instead move to another cell/RAT. The network can
`
`LTE SIB
`
`Purpose
`
`Relevance to NR and on-demand SI (Other SI)
`
`CDMA2000 inteiworking Not required
`SIB 8
`May be relevant for NR
`HNB name
`SIB 9
`SIB 10, 11, 12 PWS (ETWS and CMAS) NR shall broadcast PWS information and
`currently considered as part of other SI
`MBMS is phase 2 and these SIBs are also used for
`SC-PTM. SC-PTM may be used for MTC devices
`
`SIB 13, 15
`
`MBMS
`
`SIB 16
`SIB 17
`
`SIB 18, 19
`SIB 20
`
`UTC time
`Interworking with WLAN NR RAT should interwork with WLAN so NR cell
`should broadcast if supported
`Phase 2 but can be broadcast
`See SIB 13, 15
`
`D2D
`SC-PTM
`
`30
`
`35
`
`The assumption taken here is that cell reselection param- 25
`eters are included in Essential SI such that terminals can use
`the cell or camp on the cell even if no further system
`information ("SI") is provided and perform basic mobility.
`If cell reselection parameters are also included in ASI ( as it
`has been suggested by some), then any action under network
`overload becomes a high priority for the networks as UE
`may otherwise not be able to reselect another cell if the ASI
`is not provided when the base station is in system overload
`mode.
`It is therefore desirable to find an arrangement which can
`deal with the transmission of ASI and that is able to do so
`even when the base station is overloaded.
`According to the present invention, when the base station,
`there is provided an arrangement where, if the base station 40
`is overloaded, the terminal may be sent an indication, e.g. as
`part of the ESI or ASI, that the cell is not able to provide the
`one or more services for which the ASI was requested.
`Whereas before the terminal would have to request the
`ASI and, upon receipt of the ASI, would try to access the 45
`corresponding (which would have been unsuccessful as the
`cell is overloaded already, the terminal can now receive an
`indication that the services are not provided. This can enable
`a reduction in signaling in the network.
`Viewed from a perspective, there are two levels of solu- 50
`tions proposed in this disclosure. First, the disclosure is
`considering the aspect that the size of "other SIBs or
`on-demand SIBs" itself is considerable enough and that the
`network may be unable to accommodate the tran