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`EXHIBIT M
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`USOO8792432B2
`
`(12) United States Patent
`Martin et al.
`
`(10) Patent No.:
`(45) Date of Patent:
`
`US 8,792,432 B2
`Jul. 29, 2014
`
`(54) PRIORITIZING RACH MESSAGE CONTENTS
`
`(75) Inventors: Brian Martin, Farnham (GB); Keiichi
`Kubota, Weybridge (GB)
`
`(73) Assignee: Broadcom Corporation, Irvine, CA
`(US)
`
`(*) Notice:
`
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 435 days.
`
`(21) Appl. No.: 13/026,512
`
`(22) Filed:
`
`Feb. 14, 2011
`
`(65)
`
`Prior Publication Data
`US 2012/O2O71O2A1
`Aug. 16, 2012
`
`(2009.01)
`
`(51) Int. Cl.
`H0474/00
`(52) U.S. Cl.
`USPC ........................................... 370/329; 370/331
`(58) Field of Classification Search
`USPC .......... 370/329, 331:455/436,437, 438,442,
`455/443, 444
`See application file for complete search history.
`
`(56)
`
`References Cited
`
`U.S. PATENT DOCUMENTS
`
`6,487,420 B1 * 1 1/2002 Jonsson ........................ 455,522
`6,845,238 B1* 1/2005 Muller .........
`... 455,436
`6,847,420 B2 *
`1/2005 Lazarev et al. ..
`... 349,96
`2004/0228313 A1* 1 1/2004 Cheng et al. .................. 370,342
`2008/0045213 A1
`2/2008 Norris et al. ............... 455,435.1
`
`FOREIGN PATENT DOCUMENTS
`
`EP
`EP
`
`1720 373 A1 11/2006
`172O373 A1 * 11, 2006
`
`
`
`OTHER PUBLICATIONS
`3GPP TSG RAN WG2 Meeting #71, R2-104524, Madrid, Spain,
`Aug. 23-27, 2010, Nokia Corporation, "Addition of Optimised
`RACH Message Types’, (16 pages).
`3GPP TSG-RAN WG2 Meeting #71 bis, R2-105713, Xian, China,
`Oct. 11-15, 2010, Nokia Corporation, Nokia Siemens Networks,
`"Analysis on RACH Signalling”. (6 pages).
`3GPP TSG-RAN WG2 Meeting #72 bis, R2-1 10304, Dublin, Ire
`land, Jan. 17-21, 2011, Renesas Electronics Europe, “RACH Signal
`ling Optimisation Considerations', (4 pages).
`"Addition of optimised RACH message types”, Nokia Corporation,
`3GPP TSG-RAN WG2 Meeting #71, R2-104524, Aug. 2010, 15 pgs.
`"Analysis on RACH signalling, Nokia Corporation, 3GPP TSG
`RAN WG2 Meeting #71bis, R2-105713, Oct. 2010, 5 pgs.
`"3" Generation Partnership Project; Technical Specification Group
`Radio Access Network Radio Resource Control (RRC); Protocol
`specification (Release 10), 3GPP TS 25.331 V10.2.0, Dec. 2010, 42
`pg.S.
`
`* cited by examiner
`Primary Examiner — Andrew Lai
`Assistant Examiner — Sumitra Ganguly
`(74) Attorney, Agent, or Firm — Stanton IP Law
`(57)
`ABSTRACT
`A network/base station broadcasts an indication to direct a
`user equipment how to prioritize information for inclusion in
`an uplink message to be sent on a random access channel
`RACH. By example one value of the indication directs a user
`equipment UE to prioritize inter-frequency over intra-fre
`quency neighbor cell measurements for inclusion in the
`uplink message; and another value (or absence) of the indi
`cation directs a UE to prioritize intra-frequency over inter
`frequency neighbor cell measurements for inclusion in the
`uplink message. A UE receiving the broadcast indication
`constructs the uplink message which includes information
`that is prioritized in accordance with the indication so as not
`to exceed a maximum message size. There are also embodi
`ments with second and/or further/third indications in the
`broadcast system information for more efficiently utilizing
`the available space in the RACH message, which by example
`is an RRC Connection Request message in which UE capa
`bility information may be prioritized higher or lower than the
`measurement information.
`14 Claims, 4 Drawing Sheets
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`U.S. Patent
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`Jul. 29, 2014
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`Sheet 1 of 4
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`US 8,792,432 B2
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`U.S. Patent
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`Jul. 29, 2014
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`Sheet 2 of 4
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`US 8,792,432 B2
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`
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`Network broadcasts E.
`prioritisation informat
`BCCH
`
`UEtriggers connection
`establishment, RRC
`Connection Request message
`is constructe
`
`8
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`oes message size
`exceed the
`
`Transmit RRC
`
`Reguestion
`
`S
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`pabilities from Release
`depending on value
`alled by the network,
`if signaled)
`intra-frequency RACH
`sistenefit results (i.
`dicated that inter-fred
`has priority &
`frequency RACH
`ment results
`
`Figure 2
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`US 8,792,432 B2
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`1.
`PRIORITIZING RACH MESSAGE CONTENTS
`
`TECHNICAL FIELD
`
`The exemplary and non-limiting embodiments of this
`invention relate generally to wireless communication sys
`tems, methods, devices and computer programs, and more
`specifically relate to efficient utilization of uplink RACH
`messages and signaling for implementing Such efficiency.
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`
`BACKGROUND
`
`2
`the UE is in a RRC-Connected state for routine mobility, base
`station A would like to have those measurements as soon as
`the UE attempts access on the RACH so base station A can
`re-direct the UE's RRC connection to another neighbor base
`station if that neighbor is more appropriate for the requesting
`UE.
`UEs which support features from 3GPP Release 7 and
`onwards Support neighbor cell measurements for both inter
`frequency and intra-frequency neighbors of the RACH base
`station. For such a UE the network/base station A would
`require the UE to send measured results on the RACH for both
`those types of neighbors, but this would exceed the RACH
`message size limit
`To resolve this issue, current 3GPP specifications require
`the UE to check the message size, and if exceeded the UE
`shall omit RACH measured results starting with inter-fre
`quency results. Specifically, subclause 8.5.23 of 3GPP TS
`25.331 V10.0.0 states (emphasis added):
`1> for messages transmitted on CCCH, take care that the
`maximum allowed message size is not exceeded when
`forming the IE “Measured results on RACH', i.e. limit
`the number of included neighbour cells or if required
`omit the IE “Measured results on RACH' altogether.
`When limiting the number of included neighbouring
`cells, the number of inter-frequency cells should be lim
`ited first i.e. inter-frequency cells should be omitted
`before limiting the number of intra-frequency cells.
`In relevant teachings, document R2-104524 which is a
`Change Request for TR25.331 V10.0.0 entitled “ADDITION OF
`OPTIMISED RACH MESSAGE TYPES (3GPP TSG-RAN WG2
`Meeting #71; Madrid, Spain; 23-27 Aug. 2010; by Nokia
`Corporation and Nokia Siemens Networks) introduce a new
`RACH message type which removes the non-critical exten
`sion indicators in abstract syntax notation asn1. But the mes
`sage space saved with this new RACH message type is not
`enough to allow the UE to include neighbor cell measure
`ments for both inter-frequency and intra-frequency neighbors
`in its UL RACH message.
`The inventors consider the current approach in 3GPP as
`static approach and overly limiting, whereas the new RACH
`message noted above is not a solution either. The exemplary
`embodiments presented below resolve the above problems to
`a much greater extent than either the current 3GPP solution or
`the new RACH message type.
`
`SUMMARY
`
`In a first exemplary embodiment of the invention there is an
`apparatus comprising at least one processor and at least one
`memory storing a computer program. In this embodiment the
`at least one memory with the computer program is configured
`with the at least one processor to cause the apparatus to at
`least broadcast an indication for directing a user equipment
`how to prioritize information for inclusion in an uplink mes
`sage to be sent on a random access channel.
`In a second exemplary embodiment of the invention there
`is a method comprising: in a first instance, broadcasting an
`indication having a first value which directs a user equipment
`to prioritize inter-frequency neighbor cell measurements over
`intra-frequency neighbor cell measurements for inclusion in
`an uplink message to be sent on a random access channel; and
`in a second instance, directing a user equipment to prioritize
`intra-frequency neighbor cell measurements over inter-fre
`quency neighbor cell measurements for inclusion in an uplink
`message to be sent on the random access channel by broad
`casting a second value of the indication or by not broadcasting
`the indication.
`
`The following abbreviations that may be found in the
`specification and/or the drawing figures are defined as fol
`lows:
`3GPP third generation partnership project
`BCCH broadcast channel
`CCCH common control channel
`DL downlink (node B towards UE)
`IE information element
`MAC medium access control
`Node B base station
`RACH random access channel
`RRC radio resource control
`UE user equipment
`UL uplink (UE towards node B)
`UTRA universal terrestrial radio access
`UTRAN universal terrestrial radio access network
`UMTS universal mobile telecommunications system
`WCDMA wideband code division multiple access
`Various radio technologies utilize various RACH proce
`dures for a UE to gain contention-based access to a network.
`The RACH is one of multiple CCCHs, and in the UTRAN
`system the RACH procedure includes the UE sending an
`access message which includes a preamble part and a mes
`35
`sage part. The UE seeking connection to a WCDMA base
`station first transmits a preamble (signature sequence) on a
`RACH and then listens on an acquisition indicator channel
`AICH for a acquisition indicator AI corresponding to that
`preamble. If that AI is not received, the UE tries again and
`continues the process until it receives a corresponding AI. At
`that point the UE can then transmit the message part of its
`access message, which is also sent UL on the RACH. This
`message part is termed a RRC Connection Request in
`UTRAN.
`Being on the RACH, the transport block size of the UE's
`RRC Connection Request message is tightly limited. Several
`3GPP releases have added extensions to this message and it is
`now near if not at its size limit. Specifically, the maximum
`size of UL CCCH messages is 166 bits: the RACH transport
`block size (168 bits) less the size of the MAC header (2 bits).
`A more detailed analysis of this bit-size may be seen at
`document R2-105713 entitled 'ANALYSIS ON RACH SIGNAL
`LING” (3GPP TSG-RAN WG2 Meeting #71bis: Xian, China:
`11-15 Oct. 2010; by Nokia Corporation and Nokia Siemens
`Networks), which sets forth that there are currently occasions
`in which the 166 bit size is too limiting.
`One type of information which the UE reports on the
`RACH in its RRC Connection Request message is neighbor
`cell measurements. Consider FIG. 1: the UE sends its RRC
`60
`Connection Message UL to base station A on that station’s
`RACH, but this UE is near the border of two other cells
`controlled by respective base stations B and C. Base station A
`would like to have the UE's neighbor cell measurements from
`those other cells So it can make timely and proper decisions
`for handing over the UE. While the UE also sends neighbor
`cell measurements at other times and on other channels once
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`US 8,792,432 B2
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`3
`In a third exemplary embodiment of the invention there is
`a computer readable memory storing a computer program
`comprising code for broadcasting an indication to direct a
`user equipment how to prioritize information for inclusion in
`an uplink message to be sent on a random access channel.
`In a fourth exemplary embodiment of the invention there is
`an apparatus comprising at least one processor and at least
`one memory storing a computer program. In this embodiment
`the at least one memory with the computer program is con
`figured with the at least one processor to cause the apparatus
`to at least: receive abroadcast indication for prioritizing infor
`mation for inclusion in an uplink message to be sent on a
`random access channel; and construct the uplink message
`which includes information that is prioritized in accordance
`with the broadcast indication so as not to exceed a maximum
`message size.
`In a fifth exemplary embodiment of the invention there is a
`method comprising: receiving a broadcast indication for pri
`oritizing information for inclusion in an uplink message to be
`sent on a random access channel; and constructing the uplink
`message which includes information that is prioritized in
`accordance with the broadcast indication so as not to exceed
`a maximum message size.
`In a sixth exemplary embodiment of the invention there is
`a computer readable memory storing a computer program
`comprising: code for receiving a broadcast indication for
`prioritizing information for inclusion in an uplink message to
`be sent on a random access channel; and code for constructing
`the uplink message which includes information that is priori
`tized in accordance with the broadcast indication so as not to
`exceed a maximum message size.
`These and other embodiments and aspects are detailed
`below with particularity.
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`Generally, a base station/cell is considered intra-frequency
`with respect to base station/cell A when it uses a same radio
`frequency for UE connections as does base station/cell A, and
`is inter-frequency with respect to base station/cell A when it
`uses a different radio frequency for UE connections as does
`base station/cell A.
`Some networks use the inter-frequency measurement
`results to determine whether the RRC connection can be
`redirected to another frequency (for example, for load bal
`ancing, or for a particular service). If the UE omits these
`results as is always the case under current 3GPP specifica
`tions whenever the CCH message size is limiting to what the
`UE can report, then the network can no longer use this infor
`mation to determine whether re-direction is possible. This
`will impact certain network load-balancing algorithms and
`potentially impact the reliability of re-direction. But the more
`common case in practice is for the base station to use the
`inter-frequency measurement results for re-directing the UE
`to another frequency. Using intra-frequency measurement
`results for a soft handoverina UEconnection setup is not very
`common in practice.
`Exemplary embodiments of this invention give the network
`(e.g., base station A) the option of having the UE report the
`inter-frequency measurement results and omit the intra-fre
`quency measurement results where the CCCH message size
`will not admit them both. In an exemplary embodiment the
`network exercises this option by indicting in signaling how to
`perform prioritization of RACH measurement results which
`are to be included or omitted if the transport block size is
`insufficient to include all measurement results.
`In one exemplary embodiment, the network utilizes inter
`frequency measurement results and so the network indicates
`that inter-frequency measurement results have priority over
`intra-frequency measurement results. In this embodiment the
`network makes this indication in the system information
`which it broadcasts. For this case, the UE in response to
`reading that indication in the system information shall first
`omit intra-frequency measurement results in order that the
`message size is not exceeded. By example, this indication can
`be implemented as only a single bit in system information. If
`the bit has one value the UE shall first omit intra-frequency
`measurement results, and if the bit has an opposite value or is
`not broadcast at all then the UE shall first omit inter-fre
`quency measurement results as is the current but inflexible
`practice in 3GPP specifications.
`The above embodiment may be implemented by adoption
`into a wireless specification. By example, Such a specification
`might incorporate the following exemplary but non-limiting
`language which is adapted from that in the background sec
`tion to reflect this aspect of the invention:
`1> for messages transmitted on CCCH, take care that the
`maximum allowed message size is not exceeded when
`forming the IE “Measured results on RACH', i.e. limit
`the number of included neighbour cells or if required
`omit the IE “Measured results on RACH' altogether.
`When limiting the number of included neighbouring
`cells:
`2> If the IE “prioritise inter-frequency RACK measure
`ment results' is present and set to “TRUE'
`3> the number of intra frequency cells should be
`limited first i.e. intra frequency cells should be
`omitted before limiting the number of inter-fre
`quency cells.
`2> Otherwise:
`3> the number of inter-frequency cells should be lim
`ited first i.e. inter-frequency cells should be omitted
`before limiting the number of intra-frequency cells.
`
`BRIEF DESCRIPTION OF THE DRAWINGS
`
`35
`
`FIG. 1 is a schematic drawing of neighboring wireless
`network cells with a user equipment within one cell for illus
`trating an exemplary environment in which embodiments of
`the invention may be practiced to advantage.
`40
`FIG. 2 is a process flow diagram illustrating discrete steps
`and decisions according to an exemplary embodiment of the
`invention.
`FIGS. 3A-B are logic flow diagrams illustrating from the
`respective perspectives of a network access node and a user
`equipment the operation of a method, and a result of execu
`tion of computer program instructions embodied on a com
`puter readable memory, in accordance with the exemplary
`embodiments of this invention.
`FIG. 4 is a simplified block diagram of a UE in communi
`cation with a wireless network including a radio network
`controller RNC and a Node B, and illustrates exemplary
`electronic devices Suitable for use in practicing exemplary
`embodiments of this invention.
`
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`DETAILED DESCRIPTION
`
`55
`
`Assume for example that base station B of FIG. 1 is an
`inter-frequency neighbor of base station A, and base station C
`is an intra-frequency neighbor of base station A. The UE takes
`60
`measurements of both but there is insufficient headroom in
`the RRC Connection Request message to include both mea
`Surement results. If the UE followed the current 3GPP direc
`tive noted in the background section above it would always
`send only the measurement results for base station C which is
`an intra-frequency neighbor cell and omit the inter-frequency
`neighbor cell measurement results for base station B.
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`In another embodiment, the above flexible priority is used
`in conjunction with the new RACH message type detailed at
`document R2-104524 (referenced in the background section
`above). This makes it less likely that the measurement results
`will exceed the upwardly-limited size of the RACH message.
`But if some measurement results still must be omitted, then
`by omitting the intra-frequency results in accordance with the
`indicator in the system information still allows the network to
`perform re-redirection based on the inter-frequency measure
`ments which the UE does include in its UL RACH message.
`If the above measurement result prioritization indication is
`considered a first indication, then the network may also
`broadcast a second indication to indicate whether or not it
`supports the new RACH message type. By example, the first
`and second indications can be implemented as two bits in
`system information: one bit as the first indication to indicate
`how to prioritize the inter-frequency/intra-frequency mea
`Surement results, and another bit as the second indication to
`indicate whether the network supports the new RACH mes
`sage format.
`In a further exemplary embodiment which may be utilized
`with or without the new RACH message type, the network
`sends a third indication which indicates whether to prioritize
`particular RACH measurement results over particular UE
`capabilities for inclusion in the UL RACH message. Since
`25
`this third indication may be used in various embodiments
`with or without the above-detailed second indication, this
`third indication is alternatively referred to herein as a further
`indication. For example, the network may use this third or
`further indication to indicate that the network supports fea
`30
`tures only from Release 8 and earlier. The UE which is com
`patible with Release 9 or Release 10 does not need to indicate
`in its RACH message whether it can support features which
`are specific to Release 9 or 10, since the network cannot
`utilize those features anyway. From this third or further indi
`cation the UE knows to prioritize measurement results over
`Release 9/10 features for inclusion in the UL RACH message.
`Additional bits beyond the first indication (and second indi
`cation of there are different RACH message types in use) are
`added to system information for this third or further indica
`tion; for example an enumerated type could be used to indi
`cate which release the network Supports, and hence from what
`release the UE can omit capabilities from its RACH message.
`FIG. 2 illustrates an overview of the above process. At
`block 202 the network broadcasts on its BCCH prioritization
`information (indication) for prioritizing measurement results
`for inclusion in ULCCCH/RACH messages. At block 204 the
`UE, after having listened to the BCCH, triggers connection
`establishment and constructs a RRC Connection Request
`message. At block 206 the UE checks the size of that message,
`which is not yet sent, against the maximum transport block
`size allowed on the CCCH/RACH. If the message size
`checked at block 206 does not exceed the maximum, then
`block 208 applies and the UE transmits the RRC Connection
`Request message which it constructed at block 204. If the
`message size checked at block 206 does exceed the maxi
`mum, then block 210 applies and the UE omits information
`elements IEs in the order of prioritization signaled by the
`network at block 202.
`By example, block 210 operates as follows. If the network
`60
`sent a third or further indication as detailed above the UE
`selectively drops from the block 204-constructed message
`any of its own capabilities included in that message which are
`beyond the network's own capabilities as indicated in that
`third/further indication. The UE re-checks the message size at
`block 206, and if it still exceeds the maximum then block 210
`is re-entered. From the first indication as detailed above
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`which was broadcast at block 202, the UE selectively drops
`from what remains of the block 204-constructed message the
`intra-frequency measurement results or the inter-frequency
`measurement results, whichever is indicated by that first indi
`cation as having the lesser priority.
`FIGS. 3A-B are logic flow diagrams which describe these
`exemplary embodiments of the invention from the perspec
`tive of the access node/base station and the UE, respectively.
`FIGS. 3A-B may each be considered to illustrate the opera
`tion of a method, and a result of execution of a program of
`computer instructions stored in a computer readable memory,
`and a specific manner in which components of an electronic
`device are configured to cause that electronic device to oper
`ate. The various blocks shown in FIGS. 3A-B may also be
`considered as a plurality of coupled logic circuit elements
`constructed to carry out the associated function(s), or specific
`result of strings of computer program code stored in a
`memory.
`From the perspective of the base station, in FIG. 3A there
`is broadcast at block 302 an indication to direct a user equip
`ment how to prioritize information for inclusion in an uplink
`message to be sent on a random access channel. Further
`elements of FIG. 3A are optional and go to the specific exem
`plary embodiments variously detailed above.
`Block 304 specifies that a first value of the indication
`directs a UE to prioritize inter-frequency neighbor cell mea
`Surements over intra-frequency neighbor cell measurements
`for inclusion in the uplink message; and a second value of the
`indication or outright omission of the indication from being
`broadcast directs a UE to prioritize intra-frequency neighbor
`cell measurements over inter-frequency neighbor cell mea
`surements for inclusion in the uplink message. Blocks 302
`and 304 may be combined from the base station’s perspective
`to broadcast in a first instance the indication having the first
`value and in a second instance broadcasting the indication
`having the second value or not broadcasting the indication at
`all, since the network/base station can change the value of that
`indication (or refrain from broadcasting it) as the network
`deems appropriate.
`At block 306, if we consider the indication at block 302/
`304 as a first indication then the base station broadcasts a
`second indication in the system information for indicating
`that the base station Supports different message types.
`And at block 308, which may be combined with block 306
`but not necessarily, the base station broadcasts a third or
`further indication in the system information for prioritizing
`neighbor cell measurement results over capabilities of the
`user equipment for inclusion in the uplink message to be sent
`on the random access channel.
`From the perspective of the UE, in FIG. 3B there is
`received at block 310 a broadcast indication for prioritizing
`information for inclusion in an uplink message to be sent on
`a random access channel. At block 312 the UE constructs the
`uplink message which includes information that is prioritized
`in accordance with the broadcast indication so as not to
`exceed a maximum message size. Further elements of FIG.
`3B are optional and go to the specific exemplary embodi
`ments variously detailed above.
`Block 314 specifies that a first value of the indication
`directs that inter-frequency neighbor cell measurements are
`prioritized over intra-frequency neighbor cell measurements
`for inclusion in the uplink message; and a second value of the
`indication or omission of the indication altogether directs that
`intra-frequency neighbor cell measurements are prioritized
`over inter-frequency neighbor cell measurements for inclu
`sion in the uplink message.
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`If we consider the indication received at block 310 as a first
`indication then the UE receives at block 316 a broadcast
`second indication in the system information for indicating
`that the access node Supports different message types, in
`which different ones of the message types allow different
`volumes of the prioritized information.
`And at block 318, which may be combined with block 316
`but not necessarily, the UE receives a broadcast third or fur
`ther indication in the system information for prioritizing
`neighbor cell measurement results over capabilities of the UE
`for inclusion in the uplink message to be sent on the RACH.
`In this case the constructing of block 312 means that the UE
`constructs the uplink message to include information that is
`prioritized in accordance with the broadcast first and third/
`further indications so as not to exceed the maximum message
`S17C.
`The blocks of FIGS. 3A-B and the functions they represent
`are non-limiting examples, and may be practiced in various
`components such as integrated circuit chips and modules, and
`that the exemplary embodiments of this invention may be
`realized in an apparatus that is embodied as an integrated
`circuit. The integrated circuit, or circuits, may comprise cir
`cuitry (as well as possibly firmware) for embodying at least
`one or more of a data processor or data processors, a digital
`signal processor or processors, baseband circuitry and radio
`frequency circuitry that are configurable so as to operate in
`accordance with the exemplary embodiments of this inven
`tion.
`One technical effect and advantage of these exemplary
`embodiments is that the UE is enabled to prioritize the content
`of the RRC Connection Request message more efficiently, an
`effect which is enhanced even further by the second and/or
`third indications detailed above. The solutions presented
`herein also avoids features in the network being redundant, or
`unusable or unreliable, and also provides a general frame
`work for extending the RRCConnection Request to remain a
`viable message for future releases of UTRAN and E-UT
`RAN.
`Reference is now made to FIG. 4 for illustrating a simpli
`fied block diagram of various electronic devices and appara
`tus that are suitable for use in practicing the exemplary
`embodiments of this invention. In FIG. 4 a wireless network
`(node B 22 and RNC 24) is adapted for communication over
`a wireless link 21 with an apparatus, such as a mobile terminal
`or UE 20, via a network access node, Such as a base or relay
`45
`station or more specifically a node B 22. The network may
`include a node (e.g., the RNC 24) which provides connectiv
`ity with further networks (e.g., a publicly switched telephone
`network PSTN and/or a data communications network/Inter
`net).
`The UE20 includes processing means such as at least one
`data processor (DP) 20A, storing means such as at least one
`computer-readable memory (MEM) 20B storing at least one
`computer program (PROG) 20O, communicating means Such
`as a transmitter TX 2.0D and a receiver RX 20E for bidirec
`tional wireless communications with the node B 22 via one or
`more antennas 20F. Also stored in the MEM20B is an algo
`rithm or a set of rules 20O for prioritizing RRC Connection
`Request messages according to values of indicators received
`on broadcast channels.
`The node B 22 also includes processing means such as at
`least one data processor (DP) 22A, storing means such as at
`least one computer-readable memory (MEM) 22B storing at
`least one computer program (PROG) 22C, and communicat
`ing means such as a transmitter TX22D and a receiver RX
`65
`22E for bidirectional wireless communications with the UE
`20 via one or more antennas 22F. There is a data and/or
`
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`60
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`control path 25 coupling the node B 22 with the RNC 24, and
`another data and/or control path 23 coupling the node B 22 to
`other node B's/access nodes. Also stored in the MEM22B of
`the node B 22 is an algorithm or a set of rules 22G for
`prioritizing RRCConnection Request messages according to
`values of indicators received on broadcast channels, so the
`node B 22 knows what values to set for the indicators it
`broadcasts.
`The RNC 24 includes processing means such as at least one
`data processor (DP) 24A, storing means Such as at least one
`computer-readable memory (MEM) 24B storing at least one
`computer program (PROG) 24C, and communicating means
`Such as a modem 24H forbidirectional wireless communica
`tions with the Node B 22 via the data/control path 25. While
`not particularly illustrated for the UE20 or node B 22, those
`devices are also assumed to include as part of their wireless
`communicating means a modem which may be inbuilt on an
`RF front end chip within those devices 20, 22 and which also
`carries the TX 2.0D/22D and the RX 20E/22E.
`At least one of the PROGS 20O in the UE20 is assumed to
`include program instructions that, when executed by the asso
`ciated DP 20A, enable the device to operate in accordance
`with the exemplary embodiments of this invention, as
`detailed above. The UE20 and the node B 22 may also have
`Software to implement certain aspects of these teachings for
`implementing the indications/indicators which are broadcast
`DL. In these regards the exemplary embodiments of this
`invention may be implemented at least in part by computer
`software stored on the MEM20B, 22B which is executable by
`the DP 20A of the UE20 and/or by the DP 22A of the node B
`22, or by hardware, or by a combination of tangibly stored
`software and hardware (and tangibly stored firmware). Elec
`tronic devices implementing these aspects of the invention
`need not be the entire UE 20 or node B 22, but exemplary
`embodiments may be implemented by one or more compo
`nents of same such as the above described tangibly stored
`software, hardware, firmware and DP or a system on a chip
`SOC or an application specific integrated