AU2011203577B2 - Dynamic resource allocation, scheduling and signaling for variable data rate service in LTE - Google Patents

Abstract

Abstract for AU 2011203577 A wireless transmit/ receive unit (WTRU) and network protocols for communicating with dynamically allocated network resources is disclosed. The WTRU adapts to changing allocation of; resource blocks, scheduling, signalling or duration. An example of variable data rate service for Long Term Evolution (LTE) network uplinks and downlinks is disclosed. The WTRU may be an evolved Node B (eNB) according to an enhanced UMTS network such as HSPA+ or the like. Real time services such as VoIP are also used in the examples.

Description

Secton 29 Regulaton 8,2(2) AUSTRALIA Patents Act 1990 ORIGINAL COMPLETE SPECIFICATION STANDARD PATENT Application Number: Lodged: Invention Title: Dynamic resource allocation, scheduling and signaling for variable data rate service in LTE The following statement is a full description of this invention, including the best method of performing it known to us: P111AHAU/0710 [0001] DYNAMIC RESOURCE ALLOCATION, SCHEDULING AND SIGNALING FOR VARIABLE DATA RATE SERVICE IN LTE (00021 FIELD OF INVENTION [0003] The present invention is related to wireless communication systems. More particularly, the present invention is related to a method and apparatus for dynamic resource allocation, scheduling and signaling for variable data rate service in long term evolution (LTE) systems. [0004] BACKGROUND [0005) Wireless communication systems are well known in the art. Communications standards are developed in order to provide global connectivity for wireless systems and to achieve performance goalsin terms of, for example, throughput, latency and coverage. One current standard in widespread use, called Universal Mobile Telecinmunications Systems (UMTS), was developed as part of Third Generation (SG) Radio Systems, and is maintained by the Third Generation Partnership Project (SGPP). [0006] A typical UMTS system architecture in accordance with current 3GPP specifcations is depicted in Figure l The UMTS network architecture includes a Core Network (CN) interconnected with a UMTS Terrestrial Radio Access Network (UTRAN) via an Iu interface. The UTRAN is configured to provide wireless telecommunication services to users through wireless transmit receive units (WTRUs), referred to as user equipment (UEs) in the 3GPP standard, via a Un radio interface. For example, a commonly employed air interface defined in the UMTS standard is wideband code division multiple access. (W-CDMA). The UTRAN has one or more radio network controllers (UNCs) and base stations, referred to as Node Us by rGPP, which collectively provide for the geographic coverage for wireless communications with UEs.

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One or more Node Bs is connected to each RNC via an tub interface. RNCs within a URAN communicate via an Iar interface. [0007] . The Un radio interface of a 3GPP system uses Transport Channels (TrCHs) for transfer of higher layer packet containing user data and signaling between UEs and Node Bs. In 3GPP communications, TrCH data is conveyed by one or more physical channels defined by mutually exclusive physical radio resources, or shared physical-radio resources in the case of shared channels [0008] To improve reliability of data transmission, automatic repeat request (ARQ) or hybrid -ARQ (HARQ) is implemented. HARQ and ARQ employ a mechanism to send feedback to the original sender in the form of a positive acknowledgment (ACK) or a negative acknowledgement (NAC) that respectively indicate successful or unsuccessful receipt of a data packet to a transmitter so that the transmitter may retransmit a failed packet. HARQ also uses error correcting codes, such as turbo codes, for added reliability. 10009] Evolved universal terrestrial radio access (E-UTRA) and UTRAN long term evolution (LTR) are part of a current effort lead by SGPP towards achieving high data-rate, low-latency, packet-optimized system capacity and coverage in UMTS systems. In this regard, LTE is being designed with significant changes to existing 3GPP radio interface and radio network architetar, requiring evolved Node Bs (eNBs), which-are base stations (Node Bs) configured for LTE. For example, it has been proposed for LTE to replace code division-multiple access (CDMA) channel access used comently in UMTS, by orthogonal frequency division multiple access (OFDMA) and frequency division multiple access (FDMA) as air interface technologies for downlnk and uplink transmissions, respectively. LTE is being designed to use HARQ with one HARQ process assigned to each data flow and include physical layer support for multiple-input multiple-output (MIMO). [0010] LTE systems are also being designed to be entirely packet switched for both voice and data traffic. This. leads to many challenges in the -2design of LTE systems to support voice over internet protocol (VolP) service, which is not supported in current UMTS systems. VolP applications provide continuous voice data traffic such that data rates vary over time due to intermittent voiceaetivity. Variable-data rate applications like VoIP provide specific challengesrfor physical resource allocation, as described below. (00111 eNBs in LTE are responsible for physical radio resource assignment for both uphbik (UL) cormunicationfrorm a UE to the eNB, and downlink (DL) communications from eNB to a UE. Radio'resource-allocation in LTE systems involves the assignment offrequency-time (FT) resources in an UL or DL for a particular data flow. Specifically, according to current LTE proposals, FT resources are allocated according to blocks of frequency sabcarriers or subchanaels in one or more timeslots, generally referred to as radio blocks. The amount of physical resources assigned to. a data flow, for example a number of radio blocks, is typically chosen to support the required data rate of the application or possibly other quality of service (QeS) requirements such as priority. [0012] It has been proposed that physical resource allocatiomfor DL and UL communications over the E-JTRA air interface in LTE can be-made valid for either a predetermined duration of time, known as non-persistent assignmeAt, or an undetermined duration of time, known as persistent assignment. Since the assignment messages transmitted by the, eNB may target both the intended recipient U-E of the assignment as well as- any UEs currently assigned to the resources specified by the assignment, the eNB may multicast the assignment message, such that the control channel structure allows for UEs to decode control channel messages targeted for other UES. [0013] .For applications that require sporadic resources, such as hypertext transport protocol (HTTP) web browser traffic, the physical resources are best utilized if they are assigned on an as-need basis. In this case, the resources are explicitly assigned and signaled by the layer 1 (LI) control channel, where Li includes the physical (PHY) layer. For applications -3requiring periodic or coatinuous allocation of resources, such as for VoIP, periodic or continuoussignaling of assigned physicailresources maybe avoided using persistent allegation. According to persistent allocation, radio resource assignments are valid as long as an explicit dealocation is not made. The objective of persistent scheduling is to reduce L. and layer 2 (L2) control channel overhead, especially for YeIP traffic, where L2 includes the medium access control (MAC) layer. Persistent and non-persistent assignments by the LI control channel may be supported using, for example, a persistent flag or a message ID to distinguish between the two types of -assignment in an assignment message transmitted by the eNB. (0014] Figures 2 and S mustrate examples of persistent allocation. of frequency-time resources in LTE, where each physical layer sub-frame comprises four time interlaces to support HARQ retranamissions ofnegatively acknowledged data. Each interlace is used for the transmission ofa particular higher layer data flow, such that the same interlace in a subsequent sub-frame is used for retransmission of packets that were unsuccessfully transmitted. A fixed set of frequency-time (FT) resources are assigned in each interlace for control traffic as a control channel, which may include the Li common control channel (CCCH) and synchronization channel. [00151 Figure 2 shows an example of persistent allOcation and deallocation. In sub-frame 1, a first set of frequency-time resources (FTL), including one or more radio blocks, are allocated to UE 1 via the control channel. Assuming the transmission of data to UEB completes after i-1 sub frames, the eNlB sends in sub-frame i a control message to UE1 and UE in order to dealocate gesouregs FT1 from UE 1 and allocate them to UEs. The control channel can be used in the intermediate sub-frames between.sub frames 1 and i for the assignment of other FT resources. Figure 3 shows an example of persistent allocation and expansion, where elB assigns additional physical resources FT2 to UE1 in sub-frame i to support higher data rates for

UE

1

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[0016} A characteristic of many real time services (RTS),. such as voice services, is variable data rates. In the case of voice Services, a conversation is characterized by periods of speech followed by periods-ofsRence, thns requiring alternating constantly varying data rates. For example, a typical adaptive multi-rate (AMR) channel for voice service supports eight encoding rates from 4.75 Kbps to 12.2 Kbps and -a typical adaptive multi-rate wide-band (A1MV WB) channel supports nine encoding rates from 6-6 Ebps to 23.85 Wbps. 10017] Current techniques for persistent resource scheduling are not designed io accommnodate variations in data rates. Under conventional persistent allocation, physical resources are allocated to support either a maximum data rate-for a data Rlow or some sufficiently large -fxed data rate supported by the physical channel. Awc6rdingly, physical resources are wasted because the resource allocation is not able to adapt to changes in required data rates resulting from, for example, intermittent voice activity. 100181 In order to support variable data rates, an eN must be signaled the changing data rates for both UL and DL traffic. In LTE systems, aneNB can easily monitor DL data rate variations that originate at the eNB antmake efficient DL resource assignment However, current UMTS systems and proposals for LTE systems do not provide a manner for an eM to monitor data rate variations for UL traffic originating at a .T so that the eND may accordingly assign the appropriate amount of UL physical resources in a dynamic and efficient manner. Additionally, curre-t proposals for. LTE systems do not support high-level configuration operations for YaP service, [0019 The inventors- have recognized that there is a need in LTE systems for support of dynamic resource aflocdtidn in combination with persistent resource allocation, along with efficient scheduling and control, signaling, in order to support RTS applications with changing data rates such as VoW. Therefore, the inventors have developed a method and apparatus for solving these problems in LTE systems. -5- £0020] SUMMARY 10021) A methedand apparata for radioseseumee alloestion, schedtding and signalkng for variable data rate and real Uwe service (2T) applications are provided, where the preseAt invention is preferably uselliin long term evolution (LTE) andhigh speed Packet aeess41fSPAksyatemis £0022] lma firat preferred embdise't,Lighkeinfratinadadaih' raffio access bearer (TAiB), logical chaarnel ordAta Row ID andHIARQ prices ID are only transueitted. during a cenfingmation stageof on RIS data flow Sequencenu-mbers-frthe RTS data flew are aigaed.attheradie link contol (RLC) layer so that reordering of packets at a receiwzr arehadledathigher layers. [0028) Aceording to a second preferred embodhment, variable data rates for unlink (UL) RES traffic are reportedzto an-evolved Nude B A(eNB)by reporting only the change in data rate relative to a current data ratefr an RTS service using layer layer 2 or layer 3sigaadadg. [0024] In a third pveferredrembodLent an eNBdynay ieafy allocates radio blocks for RTS data fows in a wireless link in -responsente -the-uplink signaling of a change in data rate, such that iftbe data rate isadereased then a subet of the curentlyLssigned radibleks-aSe deaIate&erealocatedte other services orTEsand4f-the data rate is increased addhiealadio blocks are assigned to the RTS data flow. The eNB signals the new physical resource allocation to the UEey'siiaignallig the lhtAkine ntradio.bionB]assignoit. [0025] In a fourth preferred embodiment, both the eNBide&WEte a table mapping radio resaurce-reAireents fordifferent RTSaeta rates and channel conditions, sideh that the UE useset able for dynamit resource assignment when a change- in data rate is'signated for an ST ZEtadliw. (0026] A mre-detafled-understand-ing of the .itiventiuon mayb-etadhom the following descFiption of a prefeted emhodiknt.given by waky'emaple and to be understood in jen4MCtion wi&W the aceompanying drawings.

6a In one aspect, the present invention provides a wireless transmit/receive unit, WTRU, including: means for receiving a first allocation of resources for communications; wherein the first allocation of resources has an undetermined duration; 5 means for communicating according to the first allocation of resources; means for receiving control information indicating a second allocation of resources; and the WTRU including: means for communicating according to the second allocation of resources 10 for one subframe and communicating according to the first allocation of resources after the one subframe. In another aspect, the present invention provides an eNodeB including: means for sending to a wireless transmit/receive unit, WTRU, a first allocation of resources for communications; wherein the first allocation of 15 resources has an undetermined duration; means for communicating according to the first allocation of resources; means for sending to the WTRU control information indicating a second allocation of resources; and the eNodeB including: 20 means for communicating according to the second allocation of resources for one subframe and communicating according to the first allocation of resources after the one subframe, wherein the second allocation of resources overrides the first allocation of resources during the one subframe, In a further aspect, the present invention provides a method for use by a 25 wireless transmit/receive unit, WTRU, including: receiving a first allocation of resources for communications; wherein the first allocation of resources has an undetermined duration communicating according to the first allocation of resources; receiving control information indicating a second allocation of resources; 30 including: communicating according to the second allocation of resources for one subframe and communicating according to the first allocation of resources after 6b the one subframe, wherein the second allocation of resources overrides the first allocation of resources during the one subframe. 5 j0027] BRM1F ]DESgMw Ow OF THE DRAWINGS [00281 Figase I is a. Meck diagmt of the system arehiteeture iof sa conveiatieWal UMS network. [0029] Figure 2 is a diagram showing% an example of persistent assignment alheation and deaulocation in the tmefriequenrdoman. [0080] Figure 3 is a diagram showing an example of persistent assignment allocation:aad expansion in the timedrhquency domeia [0031] Figuro 4 is a flow diagram of a method for high-level configuration of reAt time services (RTS), in aemuedance with a first embodiment of the present invention. 100321 Figure 5 is aflow diagratm of amethod for signaling variable data rates for nplizk traffic, in accordance with a sesond-embodiment ofthe present invention. [0033] Figure 6 is a flaw diagram of a method for dynami-e Aocatinaald signalling of radizesuwees atan evolved NodeR( MeN)for RT&with variable data rates, in aceordrme with a tlixd embodixnent of the pre'selit invention. [0034] Figure 7 is a flow diagram of a- methd ferdynaxnd aftatioea d sigzaing-of radio resource at a user equipment:(IdE) for RWS withvauigite data rates, in accardanc-vith a fourtehoem deintiof the pren t irientixi. (0035) DETALED D]USGRIPTION OF nT- Pll@ERRED EMBODMINTS [0036) Hereafter, a wireless trasmitreceive unit (WTRU) inclndeBkit is not limited to a. user equipment (CE) inbie station,.fied or iqpile subscriber unit, pager, or any other-type of deviceqgtpable operating in a wireless environment. When referred to.heneate; haee stativa includeabut is not limited to a Nade-B, evolved Nede B4eNI), site contreronaccess point or any other type of interfacing device in a wireless enviroament. A base station is a type of WTRU. -7f0037) Alth6igh Generation Partnership Project (3GPP) long term evolution (LTfE) is used by way of example in the following deseriptiou,&he present invention is applicable to wireless communication systems including, but not thited to-,high speed packet access (HSPA) and HSPA evolution (HSPA+)- systems. Additionally, real time services (RTS) such ascvoice over internet protocol (VefP) are used by way of example to describe the invention. However, the present invention is intended to support any interattently transmitting or variable data applications, and way also be used to adapt. resource allocation for retransuxissions. In the flowing, radio access-bearer (RAB) or logical deannel may beused interchangeably with data fRow. [0038] According to ajirat prefened embodifnent, Igh-level information for a RTS data flow inclIding a datatRow identification (IfD) or equivalently a radio access bearer (RA) or logical channelID, and-ahybrid automatic repeat request (HARQ) process ID, are transmitted fron an eNB to higher layers of a recipient TE during a configuration stage prior to thetransmission ofthedata fow. A HARQ process is preferably assigned for an entire data flow. Accordingly, the data flow ID and HARQ process ID are preferably only transmitted once at- the beginning of the data flow and not on -a per packet basis. For examplo,-refeningto Figure 2 a-datatlow M anid'HARQpromesslD for -a user eqtApnient UEiL is sent- in sub-frame 1 in connection with the assiganient of freciency-tine (FT) resources FTI to U h. Similarly, a data flow'ID and HARQ process ID for auOther user equipmentIUE2 is sentinisub frame i in-connection with the assignment of frequency-tirne (FT) resources FT1 to UE following the completion of the use of Fn1 by Ugi. [0039] . Additionally, packet sequence numbers are preferably assignedat higher radio link control (RLC) layers, such that sequence numbers are not used at loWer Iayers'such'Bs physical (PHY) and medfim Access control (MAG) layers, Accordingly, the reorderignf packets that are receivedis:handled at or above theRL layer, for example, by a layer 3 (LS) protoedllsuch as-r;dis resource control (RRC). .- 8- [0040] Figure 4 is a flow diagram -of a method 400 for high-level configuration of RTS in accordance with the first embediment of the present invention, In step 405, an eNB sends a dataiflow ID (or qquivalently a-RAB or logical channelID) and a HAaRQ processiD as part of a condigratiespnessage for an R-,data fow before the transmissipn of data flow packets, for example in connection with FT1! assignment to UiEa in subframe I-of Figre2. In.stap 410, th-eEB- does not-include datai flow ID andpepss I) elds in data flow packets for higher layers, but packet sequence numbers are included in an RC control header, fbr example, for packets trajismittod in. snbframes 2 though i-1I for the UE1. communication of Figure 2 .which ends. There is; a resultant saving in higher layer signaling, since the higher layers received, for' example, the data flow ID and MHARQ process ID for the commuwnication regarding UE 1 in subframe 1 which are then available for use in p~rocessing the d4ta paekvts fort47Ei communication that are receivedinsuiframes 2 tbir~ggh i-1 withpntrepetitive signalingof the ID frpoyation. Further saving in signaling is realized through the elimination of sequenernrabsignaing in the lower layers. In implementing method 400, a transmitter is configured to transmit data flow and HARQ process IDs in a configration message and transmit packet sequence numbers in an RLC coatrot header.. [0041] Aceordingito a secondrembodiment of the preeput-invention, a UE preferably signals information to Pa eNB concerning variable data ytes in uplinL (UL).commnuications. This is preferably slaneby reporting a change in data rate relative to a current data rate. An RRS data flow js initially, assigned a certain amount ofphysical resources in order to support a current data rate using, for example, persistent assignment. When the UE detects- a new data rate, the UE-preferably signals to the eNB-the.difference betweenthe current data rate and the npw .data iate, By signaling qi4y the difference in data rate, the number of overhead bits used is minimized. [0042] By way of example, 4 reporting bits are required- to ep9rt the actual data rate when up to 9 code rates as used in a VoW service. More -9reporting bits are used if more codec rates are available. When only the change in data rate is reported, the number of reporting bits is reduced from 4 to 3 because the greatest change in -data rate from the lowest rate to -the highest rate is only 8. Preferably, the minimim nxuaber-of repeiringbitg iM used to repoft'the possible variations'in data rate for a particularRTS service. 104341) The change -h kta ratG of an RTS data flow over the UL nay be signaled using layer I (U), layer 2 (L2) or layer 8%(iS) signaling; where Li includes the physical (PHY) layer, layer 2 includes the niedium access control (MAC) and radio link control (RLC) layers and layer 3 includes the radio resource control (RRO) layer. Alternatively, the change in data rate-may be signaled at higher layers. (0044] LI signaling of changes in data rate of U traffic is preferably done using L1 control signaling, such that variable data rate reporting bits may be mutiplexed with other UL Li signals including hybrid automatic repeat request (HARQ), acknowledgment (ACK), nIegative, ackomwledgment (NAK) and channel quality indicator (CQI). Alternatively, an ULthnchannel may be used. The UL thin channel is preferably used by a UE that needs to report a rate change to the eNB in an expedited manner so that the eNB assigns new UL resources to the RTS sooner. In another alternative, a data rate change indication can be sent using a synchronous raidem a&tsstamel ' (1ACH), where the RACEI has the benefit of maa access delays. 100451 The signaling of changes in data rate 'of' UL traffic at L2 is. preferably done by including rate change reporting bits in adMAC header of a packet scheduled for tramsmissiot over the UL. AltenAtively, a rate Thange indication can be piggybacked with any UL L2 packet if the itinng of the piggybacked packet is within a reasonable delay. Alternatively, a rate change indication can be sent via MAC control packet ddta unit (PDU), where the MAC control PDU may excluively contain the data, rate change indication o6 may contain other information for other control purposes. In another alternative, a rate change indication may be included in a periodiaRLC status -10report from the UE to the eNB. Using L3 signaling, a change in data rate may be signaled by including a rate change indication-in RUC signaling. [0046] When the-eNB detects the data rate change reported by a TJEj, the eNB. dynamicaly reallocates physical resources assigned to. the RTS of that UE acordingly. For example, -if the data rate. decreatsed- then the eNB can reallocate some of the resources originally assigned to the UE during persistent assignment to other UEs. The eNB may assign additional resources to the UE in the case of an increase in data rate. [0047] Preferably, the dynamic allocation by the eNB ovexrides the initial resource aliocationby persistent assignment. :The eNB may specify a time duration during which the dynamic allocation overrides the original allocationwhen. signaling the dynamic resource allocation to the UE. If no duration is specified, then it may be assumed that the dynanc allocation is only used once, The dynamic allocation by eNB to override persistent resource allocation is not only applicable to variable data rate services, but may also be used to reallocate resources for retransmissions. [0948] Figure 54s aflow diagram of a method 500 for signaling variable data rates frinUL RTS traffic, in accordance with the second embodiment ofthe present invention. A UE signals variable data rates for UL RTS traffic to an eNE by repeating the change in data rate relativato a current data rate using a minimum number of bits, in step 505. The reporting may-be done using L1, L2 or L signaling, as described above. In step 510, the eNB adjusts. the amount ofphysical resources assigned to the UE for the RTS accordingto the reported change in data rate. In contrast with the prior art of Figures 2 and 3, the FT resource allocation for UEI made in sub-frame I does not necessarily remain fixed until sub-frame i, but can be dynamically changed per step 510 in a sub-frame prior to sub-frame i. In implementing method 500, a transceiver component may be configured to transmit signals reflecting change in data rate, and a resource allocation component may be. configured to allocate physical resources. -11-- [0049] According to a third embodiment of the present-invention, DL and UL radio resources assigned to an RTS data flow are dynamically allocatedin order to efficently -use the physical resu arces assigned to variabIO data rates services Typically, the maximuma mount of radio resources required for an RTS are initialy assignedby persistent allocation, in order to support the maraum data rate for theRTS. Forillstrativepurposes, itis assumed that a set of N radio blocks are iitially allocated by persistent scheduling. The eNB preferably dynamically allocates only a subset ofthe N radio blocks to the RTS data low when lower data rates are required. Under higher data rates; the eNB alelates -a larger set of radio blocks, and can allocate new radio. blocks addition to thetoriginal set of N radio blocks, if desired. If subrband allocation is supported, where radio resources are allocated according to fractions. of a radio blddk, then dynamic resource alocation is preferably, adapted-to the granilarity of sub-bands. [0050] PreferabLy, only the change in radio resource anocatiwnresulting from dynamic resource, aioecation is signaled by the eNB to the target UE in order to reduce signaling overhead, In one embodiment, the radio resource blocks assigned to the 1TS are indexed such that the radio blocks may-be arranged in incseasing or decreasing order . according to index number, Accordingly, the eNB only signals the number of radio: blocks for dynamic allocation, sudh that thel tE accordingly uses the reported number of radio blocks in order of index number starting with the radio black Mith either lowest or the highestindex number. By way of exa mple, radio blocks indeed 2, 3, 5 and 8 are assigned to a ULE (ie. N_4) for -an RTS data flow duxlng persistent scheduling. In response to a decrease in data rate, the-eN reports that only 3 tadio blocks are dynamically allocatedd to.the CE.- Bosed on the report from the eNB and starting with the lowest index, the VEhknows that the new resource-allocation is radio blocks 2, 3 and 5. Alternatively, a positive or' negative -diferenc6 between the original allocation of N blacks and -the number needed may be signaled. Where more bleeks are required, default -12parameters can be provided or block identification can be signaled for the additional locks. [00511 A new radio resource allocation is preferably signaled bf a eNB to a-UE as a field in Li or L2 control signaling- for fast DL or UL dynamic resbuate dllocation, or, in LS RRC signalng-in the ease of sldwly changing resource alineation. When-M or L2 control'signeaingis used, a physical layer ACK or 'NAK is preferably transmnitted back -to the eNB to improve the reliability of the resoarce aRocation signaling. Additional, information including, but not limited to, the duration of new radio resource allocation, repetition-period, sequence pattern, radioresource and therequency hopping pattern may be provided 'as part of the radio resource allocation-aignaling, when desired. [00521. Figtde £is-a fiewtdaagram of a methd,600br dynamicalloation and signaling of radio resources at an eNfor RTS withvarahle data rates, in accordaneeswith the -tbird-embodiment of the present invention.. In stepto6rg an eNB is notified of aishange in data rate for an RTSdata flow over wireless link between the eNB and a UE such that N radio blocks are currently assigned to the RTS. In step 610, theeNB dynamicaly-allocatea radio -blocks to the UE for the RTS data flow in response to the change in data rate.such that if the data rate decreased, then a subset of the N radio blocks are assigned, and if the data rate increased, then additional radio 'blocks are assigned, In step &d5, the eNB signalh' to the IJE the new, radio blo allocation by only signaling thetchange in radio block assignment. Ine cntrast with the prior art of Figures'2 and 3, the FT resource-allocation for, UEirmade in sub-frame 1 doea not~necessarily remain fixed until sub-frame i-but can be dynamicay changed per step 615 prior to sub-fraine i. In implementing method 600, a data rate detection component may be oifgured to detect changes in data rate associated with a data flow, and a resource allocation component can be configue4 to allocate physical-resources- and is associated with a transmitter in order to signal resource, allocations to a UE. -is- [0053] In accordance with a fourthembodimentofthe present invention, a table relating data rates to radio resource chauactefiatisdaedfor efficient radio resourcebaiocation acidssignaling of UL resources Both theNBR and the UE preferablystore-a pre-calculateditable relatinganumber of ra4ipspeguree blocks, or when applicablersub-bandsgrequired lr WS datarate for avange of channel conditions according to, for example, modulation and co;ingsgcheme (MOS). When a new data rate is identified-at the UE for a-carrent RTS.data flow over the UL, the. E preferably calculates the needed radio resgures, under determined Uit channel conditions-basedon the tablecntry forthat data rate. Accerdingly, the; UE does not have-to cormaninicate with the-eN34tO adapt its resource assignment, and overhead controlsiganaivg todhe, eNB is reduced. [00541 In a preferred embodiment, the eNB signals a pye-aHfecated table to the UE where the table identifies specific radio resources, such as radio blocks or sub-bands, that axe'requiredfor various RTS datarates$fr a rang&ef channel conditions. For example, radio blocks May be. referred to by indez number, as described above. The .UE dynamically alocates UL resources-in response to a change. i data rate of an RTS data flow by -lookng eap the corresponding resourcesin the tabie and signals-the assigned resource setto the eNBR The UE, may wait for an approval messagefrom the eNB~bafore using the newly assigned UL resources. The 'eNB. preferably sends .. a approval of new radio resource assign-ment when additional resources' ast allocated to accommodate an increase in data rate. The approval, message from the eNB is optional when radio resources are deallocated for decrIeases in data rate. [0055] Figure 7 i8 aflowdiagram of a methoed7O0Sr dyanaic allocation and signaling of-radio resources at a user equipment WUE) for WMS with variable data rates, in accordance with the fourth enibodenentefthe present invention. lnastep.705) a UE receives' a table f~rim an-eNthatmaps requircEl radio resources -or_ resource charatteristics to MS data. rates under -14predetermined channel conditions. In step710, the ,MUEd'etects a change in dataM ate of an ULSRS data flow, and determines the, corresponding radio resCtree ellcationifrenthe-table. In step 15, the UE signals theAdetemnnied radio-esour-e alaiemda tothe eNB and waits for an approval sigdatr6mthe eNB before -sing'the determined radio research's. n Mebntrast with the prier art of Figures 2 aadShe r-soureiatioedtionforWU rniade insub-rame 1 doles not necessarily remain fimed until sub-frame i, but can be dynanieally changedin a sub-*hane prior to sub-franm i. Inimplbmenting method@0IF0, a. transceier is usedtu ieive4the tablezffom the eNB andignatraivwesoUrMe.

allocations to te eNB and a data rate detection component is configured'to detect changes in data. rate. [0056] Embediments [@057] -Embodiment 1. A base station configured to conduct wireless conimunications in a wireless communication system. [0058] Embodiment 2. The base station of emrbodfinaentA cmprising a resource allocation component configured to allocatefor selected period-e set of hysica-resources-f a wireless link to a variable data rate dataflbw with a wireless transmit/receive unit (W T) according to a, curent dat -rate associated with the dataflow. [0059] Embodirenr'it3. The base station of embodiment 2 "further comprising-a- data rate detection component congured to, detect a -new data rate associated with the data flow. 100601 Embodiment 4. The base station as in any of embodiments 2-3 wherein said resource. location component -is configured to -dynamicdly allocate a new set of physical resources to the data flew according to theMew data ratedu=ring saidse1ecteld period. [00611 Embodibxnit5. The The base station as im any of embodiments 3-4 wherein the data-rate detection component is configueed in-a receiver to -15detect a new data rate based:on signaling received from the WTRT duing the selected period. [0062] Embodimomt 6. . The base station of embodiment 5 wherein the resource allocatienscomponent is associated with a transmitter that- is: configuredito sigaLreseurce aRocations to WTRUs. [0063] Embodiment '7. The base station of enbadiment 6 wherein the, transmitter is configured to signal resources allocationa using one oflayer 1, Layer 2 or layer S signaling. [0064] Embodiment 8. The base station as in any. of-embodirents,67 wherein the -transmitter is further configured to signal at least one of a duration, a repetition period, a sequence pattern,:aadio resoureepattern and; a frequency hopping pattern associated with reseuce alocationsto WTRUs. [00651 -Embodimet& The base station as in any of embodiments 3-8 wherein the data rate! dtection component is configured to detect anewdata rate based on receiving asignal indicative of the amount ofchange in the data. rate from the WTRU. [0066] Embodiment 10. The base station as'in.anylof embodiments 3-9 wherein the data rate detection component is conigured to detect a new data rate based on receiving a signal indicative of an increase or decrease in required resource allocation from the WTRU. [00671 Embodimentl1. The base stationofembodiment 10 wherMiithe resource allocation component is configured to signil a new set of allocated physical resources to the WTEU after receiving a signal indicative of an increase in required resource allocation from the WTRU.

[00681 Embodiment 12. The base-station asin anyofembodiments 10-11 wherein the resource allocation component is configured not to signal ta ew set of allocated physical resourees to the WTRU after receiving a signal indicative of a decrease in required resource allocation from the WTRT. [0069] Embodiment 13. The base station as in any ofembodiments 242 wterein the resource alocation component is configured to signabatable that -16maps resources when signaling-a set of aleicated physical resources. [0070] Embodiment 14. The base station as in any ofembodiments 10-13 wherein the resource allocation component is configured tesignal approvalof a new set of alo ated~physicaresaurces to the WTRU after recxivitg asignal indicative of an increase.n requiredd resource avocation frna the WTRU whereby the WTRU then uses the new, 'set of alocateA physiel sresoueces, determined by the WTRU. [0071] Embodiment 15. The base station as inany of embodiments 3-14 wherein the data rate detection component is configuiredte detect a new data rate based on monitoring the data flow during the 'selected period and the resource allocation -cetiponent is associated with a transmitter that is configured to signal resource alocations to WTRUs. [0072] Embodiment 1.6. Thebase station as inmany of embodbbents2A5 wherein the resource allegation component is configazed. to signal, re.spur-ce, allegations to WTRUs in terms of a number of blocks. [00731 Embodiment 17. The base station of embodiment 16 where the resource allocation component is confgured to signala revisedset df located physical resources by signahng information related to the number blocks in the revised set of allocated physical resources. 10074) Embodiment 18. The base station as in-any ofembodiments 2-17 wherein the physical resources include frequency-time resources. [00751 Embodiment 10. Thebasestation as-in-any ofembodiments 248 wh&ein the physical resources ischde radio blocks comprising. blocks. of frequency subcarriers and timeslots. [0076 -Embodiment 20. . The base station as in any of the preceding embodiments wherein the data flow is part of a realtime serv-e. [0077] Embodiment 21. The.base station of embodiment 20 wherein the real time service is a Voice over Internet Protocol (VoIP) service. [0078} Embodiment 22. The base station as in any of the preceding embodiments configured as an evolved Node B (eN]D) in a 3C4PP long term -17evolution (LTE) wireless communication system. [00791 Embodnien6t . -The base-stationof embodiment 22 wherein the, WITRU is configured asa User Eqipinent CUE). [0080] Embodiment 24. A base station confgared with a bi'eraehy' of layersindnding a lowestiphysicallayer, axmedinm accesseontrot(WLAC) layer and higher - ayers, to conduct wireless conmmmaietis in a wiceks communication system.

10081] Embodiment 25. The base station ofembodimentNA eompsinga resource allocation componentsconflgured to alJocatefor a selectedqperiod a-set; of physical reseorees of a wireless link to a data Row with a wireless, tranmit/receive uit (WTRU) according to a curretdataxate associated with the data flow. [0082] Embodimenti26. The base station of embodiment. .25 further; comprising-a-trasmitter conMgureatosignal resoueaRosationS to WThMAL in a selected time frame format. [00831 Elmbodiment 27. The base station of embodiment.26whereinthe transmitter is configured to signalresource allocations to W'1hUs ina selected time frae femnat such that a resource location for a data Aow is transmitted in connection with a data flow identification (ID) in a highMIlayP in advanceftransmitting data packet associated with the data flow. [§0843 Ejibodiment-28. The base statiofenhogieat 2.whemthe transmitter isfurftercenflggareto transmit datappagqets aseeint4 wth O" data flow with packet sequence numbers inhigherlayerswithput the data-flow ID, . [0085] Embodiment 29. The base station ofembodimant 2&6wheminath# transmitter is configured tosignal resource allocations toWTRUsin aseleeted time frame format such that a resource allocation- for a data flow is transmiltted in conection with -a data flow identification (D) and a hybrid automatic repeat reqnest (iMARQ) prbcess ID in a higher layerin-advance of transmitting data packets associated: with' the data flewi .18- [0086] Embodiment 30. The base station of eebodiment 29 Wherein the transmitter isf i-rther conag tred with the data flow with packet sequence nutbersdinhigher layers without the data flow ID or the RARQ p-rocessID. [09871 Embddiment 3l The base station asinanygeembodimets>26-80 whereinthe transniittier ceAfguredtotraasmitidata pactets associatedsvith data flows such that packet sequence numbers are excluded fram physical layer and MAC layer signalng. [008$) Ejbodiment-82. The base station as irany ofembodinients25-31 ceanigared as an evolved-Node-B (eNB in- a:30FF icng term evolution (LTfE) wireless comrouniation system wherein the WITRU is configind- as 'a User Equipment (UE). [00891 Eibodiment33.- A wireless tracsmittceive unit (WT.U) cedfgured t4oAdurt wireless communications in a wie1less communication systems , [0090] Embodiment 84. The WTRU of embodiment .23 coimprising a trahasceiver component contigdred to utilize selectively allocated sets of physical resources of a wireless link for -a variable dhta-rate-:data flow with a base station. [0091) Embodinent 35. The WTRUI of embodiment 24 wherein said transeeiveteomponerit configured.to accept 'a new dgnAmiCa]y AHecated! seofof physital t&snarces t6ective of a Patt;rcha2ge frThe data flow- hie an aik-ted set of Physical resources is beingased. [0092] Embodiment 36. The WTRU as in any of embodiments 84--5 farther comprising a lIatnrate detetiomcomponentmenfig'ed to detect a nnw data rate -associated with the data flow while an: aHocated set of physical resources is being used. [00931 Embodiment 37. The WTRU of embodiment 86 wherein said tranceiver. component is conEgured -to -transmit a.sign.a indicative of a detected rate change in the- data flowto the basestation. -19-- [0094] Embodimaent 38. The WTRU of emnbodimentr 37 Wherein said transceiver conponentis configured te transmit a signalrefleetingan amount ofta detettedrate change to the .base- station as the signal Sndieative'of a detected ate change in the data-flow. [0091] Embodiment 39. The WTRU of .embodiment/'30 wherein said transceiver component is further configured to use a. new dynamiealiy allocated set of physical resources signaled from the base station that is, generated in response to the WTLU's signal renecting an amount of a detected rate change. -' (0096] Embodiment 40. The WTRU as in any of embodiments 36-39 wherei'the dataamte -detection eompbnent is conf red todeteinnfe new allocated set of physicl resources in response t-t detecting a new data rate. associated with the data flow. (0097] Embodinmit 41 The WTRU of embodiment.40 wherein said transceiver component is configured to transmit a signal indicative of the determined tiew allorated set of-physical-resources to thesbase station as the signal indiaetive of a detected rate change in the data flow. [o0g] Enibodne=tr42. The. WRRU as in any 0? embodinents 35-41 wherein said transceiver'cu-mponetnis'confguredtotasmit asignstathe base'statien'iadicating -anincrease ora ddreqse of physicaIresources betVe* the determined new allocated set ofphysicali resources and the alocated setof physical resoiaces. being used as the igal indicative'ofi detectedt'ate change in the data flow. [0099] Embodiment 48. The WTRU of embddiment 42 wherein said transceiver component4sctenmfgueetto use theldeter-minednew allocatedtsetof physical iesomta mperdeterrning a decrease inkphysical resources. 100100] - Embodt~eiat 44; The WTRU as 'in any- of embediments 42-43 wherein said traaseiver tonmpoient is. farther- confgured' to ise the determined new allocated set of physical resoaens er'recivingasigni indicating aceptatne by the base, station when an inOrease in physical -20resources is determined. [00101] Embodiment-45. The WTRU-,as in -any of embodiments 9444. wherein said transceiver, component is configured to receive froin 4he base station signaling reflecting the selectivelyanneatdstfphysiaresouces. for the wireless liVk&forkhe vamable data rate data fow inerQs xof a nrflAdr of resource-locks. [00102] Embedinenth46. T he WTRU and-istcntgured-to receive a signal reflective of a revised number resouTe blocks upon which to base the new dynamically alloted set of physical resources reflective of a ratecchange ii the data Row. [00103] Embodiment 47- The WT1U. as ia any of embodiments 33-46. configured as a Ul in a long term evolution (LWE) wireless communicabion system.. [00104] Embodiment 48. The WTRY as idt any of, embodiments 24-46 wherein tkebasesrtation is configuredasan evolvedNodaB(elB).. [001051 Embodiment 40.. A wireless transmitkaeeiv unit (WTRU±J) configured with a heirarchy of layers including-a lowest physical lanw, medium access -control (VAC) layer and higher layers toeconduet wireless commumcations,ina wireless communication system. 10010] Embodiment 50. The WTRU of embodirMant 49 eemprA4ing- a transceiver component configured to utilize seleatively allocated spts of physical resources of fdr a wireless linkfor a variable datarate data±w With a base station. [00107] Embodiment 51 The WTRU of embodiment 50, lltrein said transceiver component configurei to receive signals indicative' of a resoure allocation from a base stpion in a seleted-tine frameformat such thyit a resource0Ieocation for a data flow is received in conneebionewith a data flow identification (M). ia a. higher layer in advance of recejiNng data packets associated with the:data flw. [00108 Emrbodiment!52. The WTRU of embodiment 51 wherein said -21transceiver component is further configured to receive data packets associated with the data flow with packet sequence numbers in higher layers withoutthe data flow ID. [00109 EMnbbdiment 53., The-WTRU as in any of embodiment 50-52 wherein said transceiver component is-configured toreceivesignalsindicative ofa resource alleationS a selected time frame format such that a resource allocation for a data flow is received in connection with a data flow identification QD) and-a hybrid automatic-repeat request ($ARQ) process rn in a higher -ayer in-advance of receiving data packets associated with the-data flow. [001101 Embodiment54. The WTRU of embodiment 52. wherein said transeeivdr component is confgured to then receive data packets-.astociated with the data flow with packet sequence numbers in highervlayers without-the: data 1kw ID or the, EARQ-'rocess MD. (00111] Embodiment 55. The WTRU of embodiment -54 wherein said transceiver component ti congtgwedh to receive data packets associated with data flows such that packet sequence nnanbers are excluded from -physical layer and MAC layer signaling. [00112] Embodiment 56. The WTRT as in- any of embodiments 50L55 configured as a UE in a lonk term evolution (UIDE) wireless conianicatine system wherein the base station is configured as an evolved.Node B(NB). 100110] Embodiment 57. A methed-for dynamic resource alocation an& signaling in a wireless communication system. [00114] Enibadimert 58. The nthod of embodiinent 57 'complasig allocating a first set of physical resources of a wireless link to a variafbe-data rate data -flow accordiagto a current -data rate associated with the data-flow. [00115 Embdaiment-59 The method of enbodimeant 58 farther comprising detecting a newdata rate associated with thb data Rew.

1001161 Embodiment 60. The method of enddedinent 59 further composing dynanienafy allocatingiatnew set of physical reso'rceste the data -22flow according to the new data rate. [00117} Embodiment 6L. The -method of embodiment 69 farthr comprising signaling the new set of physical resources. 001181 Embodiment 62, The method. as i any of embodiments 58-61 whereintherwireleslik is between a WTRU andrat least oneother WTRU.. [00:19] Embidiment 63. The method of embodiment 62 wherein the signalingethe new set of-physical resources is to the:,atleast one otherWTWU, {00120] Embodiment 64. The method- as in any of embodiments 61-63 wherein the signaling the new set of physical resources is in-layerJl or layer 2 signaling. [001211 Embodiment 65. The method as in any ofenbodnMents -61-68 wherein the signalng the. -new set of physical resougces is in layer 3 .adio resource sConatrol signaling. (001221 Embodiment 66. The method as in anypef embodiments 60-66 farther comprising signalingrat least one of a durationa repeti. period, a. sequence pattern, amradia resource patten and a *eaunncy hopping'pattcna associated with the new set of physical resources. [00123] Embodiment 67. The method as in any -of embodiments 61-66 further comprising receiving one of an acknowledgement (ACK) or a negative adknowledgqment (NAK) in response to the signa4ng of the new sqt ofphysical resources.

{001241 Embodiment 68. The nqthod as in any of'embOdinants 61-67 wherein the signaling the new set of physical resources iS by signaling a change from the first. sot of -physical resources to the new -set of physical resources. [00125] Embodiment 69. 'The method of embodiMent 68 wherein the physical resources include radio blocks and their dynamically alioeating the-new set of physical resomxrestis by adding or removing.-radio blockssfrom the first set of physical resopreg cs. [00126] Embodiment 7(1 The method of embadiment 69 wherein the ~23removing blocks occurs, when the new data rate is less than the current data rate. {00127] - Embodient7l. The method as in anrg of embodiments 6940 wherein the adding blo&s occurs when the-new data-ratedsgreaternthan the current data rate. {001281 Embodinment 7-2. The method as in any of-embodiments 69-71 wherein each radio block has an associated ingem niuaaber and wherein the signaiing the new set of physical resetxces is based on the indexinumbes. [00129] Embodiment 7-3. The method of embodiment 72 wherein the dynamically allocating the new set of physical resources isvlative tqra lowest index numberassociated w-ith radio-blheks in the first set offphystea-resopress.. (00130] Embodiment 74. The method as in any of embodiments 69-73 wherein the signaling the new set of physical resonrcesdneludes'a&nmber of radio blocks in the-new seto?4hysical resources. -[001 ] Emhbodiment 75. The method as insang of embodiments#844 wherein the allocating the fist set of physical resouorses. is according ,to persistent assignment. [001321 Embodiment 76. The method as in any of embodiments 59-7-5 further comprising receiving the new-data rate fmma an .at least one <otber WTRU. [00133] Embodiment 77. The method as in anrof embodierents -67-76 wherein the new data rate is received as a relative change in data. rate between the new data rate and the current data rate. [001.4'] Embodiient 78. The method as in any ofeembodimenta,58-W wherein the physical esurces include frequency-time resources. [001351 Embbdiment 79. The method -of embodiment 78 wherdin the physical resources include radio blocks. compriing blocks of frequency subcarfier'sand-timeslets. [008i36] Einbodiment'80. Thec -method as in any of embodimqnts c5849 wherein the data flow is part of a real thue service. -24- [00-1371 Embodiment 81. The method of embodiment80-whdrein the-real time service is a Voice over Jiternet Protocol (VoWIP) service. [00188] Embodiment 82. The methodcas. ih any'ofeembodinents 58-SI farther complising- signal ng a data flow 1D and a hybrid automatit repeat request (HARQ) ID during a configuration stage for the data fibw. I00139 Emedimnent 83t The-method of enb'dicment 82Whtmreit the configtation stag-is a-contrtil channel in a first sub-frame. {00140] Embodiment 84. The method of entodixaent 86 further comprising assigning seGuence numbers to packets.6f a data flow at a radio li±k control (RL)- l1yer. 100141) Exuhomeut -5. A method for-dynande resource -allocation and signahng in-a widsseommunication, system. (00142] Embodiment 86. The method of embodiment 85 comprising. storing a predetermined table mapping requiredphysicatresources or physical resource characteristics to a range of real time service (R US) datawrates under predetermined channel conditions. [00143] Embodiment 87. The method of embodiment..86 farther comprising detecting a new data rate associated with a data ftow.

(0044] Emnbodiment- 8 The method of embodnient 87 further. comprising dynamically allocating a new set of physical resources to the data ROw according to the table and the new data rate. [00145} -Embodixr'ent 89. - The method of embodinent 8:8 further comprising signaling the new set of physical resou-ces. [00146] -Embodiment $0. The method of embodiment 89 wherein the signaling the new set of physical resources is to a second WYRU. - [00147] Embodiment 9-1. The method - of enibadimeant 90, farther comprising receiving an approval signal from the-sqnd WTRU. (00148] Embodiment 92. The method of embodiment 91 further comprising-waditing to use the now set of physical ressurces until the appavasl signal is received. -25- [00149] Embodiment 03. The method as in any -of embodiment 80-92 configured to operate in a Uaer Equipment (UB)ina4ong term evolution.(LTE) systemnwhereinthesseeendWTRU is configured as aneyplved Node i (eN. 00150i Embodiment Q4. The method as inamy of embodimpats 8$-3 wherein the requiredphysieal-resaourees include radio blocks anditherequired physical resource cheractersties include a number pf rndio blcks. (00151] Embdiment 95. - The method as in any-ef- embodimeits 86,_94 wherein the predetermined channel conditions include a modulation and coding scheme (MO -) 1001521 Although the features and elements of the present invention 'are described in the preferred emibodiments in particular combinations, each feature or element can be used alone without the other features and elements of the preferred embodiments or in various combinations with orwithout other features and elements of the present invention. The methods or flow charts provided in the present invention may be implemented in a computer program, software, or firmware tangibly embodied in a computer-readable storage medium for execution by a general purpose computer or a processor. Examples of computer-readable storage mediums include a read only memory (ROM), a random access memory (RAM), a register, cache memory, semiconductor memory devices, magnetic media such as internal hard disks and removable disks, magneto-optical media, and optical media such as CD-ROM diaks, and digital versatile disks (DVDs). [00153] Suitable processors include, by way of example, a general purpose processor, a special purpose processor, a conventional processor, a digital signal processor (DSP), a plurality of microprocessors, one or more microprocessors in association with a DSP core, a controller, a microcontroller, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (PPGAs) circuits, any integrated circuit endlor a state machine. [00154] A processor in association with software may be used to implement a radio frequency transceiver for in use in a wireless transmit receive unit -26- (WTRTJ), user equipment terminal, baseatation, radi networkcostroller, or any hest computer. TheWTRU -mag be ntset i-wcejunctin withrmodulis, implemented in Kardwste and/kr software, such a's aeamera,.awideoe amera module, a vi&lbpghvne, a speakerphone, a vibrating .device, a -speaker, a mnie'aphatel a. televiis itdatiseeWert a madaA-fee headkety t keyb*uardy a Bluetooth module, . frejueymodulated (FM)iradk unit, a-liquid crystal display (1tCDdi, 1 iyu tlit, an organic Jight-emnittiig diode'(Q4E) dispel unit, a digital-jusio player, a media player, video game pLayer madide, an Internet browser, and/or any wireless local area network (WLAN) module. -27-

Claims (33)

1. A wireless transmit/receive unit, WTRU, including: means for receiving a first allocation of resources for communications; wherein the first allocation of resources has an undetermined duration; 5 means for communicating according to the first allocation of resources; means for receiving control information indicating a second allocation of resources; and the WTRU including: means for communicating according to the second allocation of resources 10 for one subframe and communicating according to the first allocation of resources after the one subframe.

2. The WTRU of claim 1, wherein the second allocation of resources overrides the first allocation of resources during the one subframe.

3. The WTRU of claim 1 wherein the first allocation of resources indicates at 15 least a first number of resource blocks assigned to the WTRU and the second allocation of resources indicates at least a second number of resource blocks assigned to the WTRU.

4. The WTRU of claim 2 wherein the first number of resource blocks indicates a first number of subchannels assigned to the WTRU and the second number of 20 resource blocks indicates a second number of subchannels assigned to the WTRU.

5. The WTRU of any preceding claim wherein the first allocation of resources is utilized for communicating until the WTRU receives a deallocation of the first allocation of resources. 25

6. The WTRU of any preceding claim wherein the first and second allocation of resources is for uplink or downlink communications. 29

7. The WTRU of any preceding claim wherein the second allocation of resources is a dynamic allocation of resources.

8. The WTRU of any preceding claim wherein the first allocation of resources is a persistent allocation of resources. 5

9. The WTRU of any preceding claim wherein in that the first allocation of resources supports a voice over Internet protocol, VOIP.

10. The WTRU of any preceding claim wherein the first allocation and the second allocation of resources are distinguished by a different message ID.

11. The WTRU of any preceding claim wherein the receiving the second 10 allocation of resources is in response to sending signaling in a medium access control, MAC, header.

12. An eNodeB including: means for sending to a wireless transmit/receive unit, WTRU, a first allocation of resources for communications; wherein the first allocation of 15 resources has an undetermined duration; means for communicating according to the first allocation of resources; means for sending to the WTRU control information indicating a second allocation of resources; and the eNodeB including: 20 means for communicating according to the second allocation of resources for one subframe and communicating according to the first allocation of resources after the one subframe, wherein the second allocation of resources overrides the first allocation of resources during the one subframe.

13. The eNobeB of claim 12 wherein the second allocation of resources 25 overrides the first allocation of resources during the one subframe.

14. The eNodeB of claim 12 further wherein the first allocation of resources indicates at least a first number of resource blocks assigned to the WTRU and the 30 second allocation of resources indicates at least a second number of resource blocks assigned to the WTRU.

15. The eNodeB of claim 14 wherein the first number of resource blocks indicates a first number of subchannels assigned to the WTRU and the second 5 number of resource blocks indicates a second number of subchannels assigned to the WTRU.

16. The eNodeB of any one of claims 12 to 15 wherein the first allocation of resources is utilized for communicating until the WTRU receives a deallocation of the first allocation of resources. 10

17. The eNodeB of any one of claims 12 to 16 wherein the first and second allocation of resources is for uplink or downlink communications.

18. The eNodeB of any one of claims 12 to 17 wherein the second allocation of resources is a dynamic allocation of resources.

19. The eNodeB of any one of claims 12 to 18 wherein the first allocation of 15 resources is a persistent allocation of resources.

20. The eNodeB of any one of claims 12 to 19 further characterized in that the first allocation of resources supports a voice over Internet protocol, VOIP.

21. The eNodeB of any one of claims 12 to 20 wherein the sent first allocation and the second allocation of resources have different message IDs. 20

22. The eNodeB of any one of claims 12 to 21 further including means for receiving signaling in a medium access control, MAC, header from the WTRU and wherein the second allocation is sent in response to the signaling the MAC header.

23. A method for use by a wireless transmit/receive unit, WTRU, including: 31 receiving a first allocation of resources for communications; wherein the first allocation of resources has an undetermined duration communicating according to the first allocation of resources; receiving control information indicating a second allocation of resources; 5 including: communicating according to the second allocation of resources for one subframe and communicating according to the first allocation of resources after the one subframe, wherein the second allocation of resources overrides the first allocation of resources during the one subframe. 10

24. The method of claim 23, wherein the second allocation of resources overrides the first allocaltion of resources during the one subframe.

25. The method of claim 23 wherein the first allocation of resources indicates at least a first number of resource blocks assigned to the WTRU and the second allocation of resources indicates at least a second number of resource blocks 15 assigned to the WTRU.

26. The method of claim 25 wherein the first number of resource blocks indicates a first number of subchannels assigned to the WTRU and the second number of resource blocks indicates a second number of subchannels assigned to the WTRU. 20

27. The method of any one of claims 23 to 26 wherein the first allocation of resources is utilized for communicating until the WTRU receives a deallocation of the first allocation of resources.

28. The method of any one of claims 23 to 27 wherein the first and second allocation of resources is for uplink or downlink communications. 25

29. The method of any one of claims 23 to 28 wherein the second allocation of resources is a dynamic allocation of resources. 32

30. The method of any one of claims 23 to 29 wherein the first allocation of resources is a persistent allocation of resources.

31. The method of any one of claims 23 to 30 wherein the first allocation of resources supports a voice over Internet protocol, VOIP. 5

32. The method of any one of claims 23 to 31 wherein the first allocation and the second allocation of resources are distinguished by a different message ID.

33. The method of any one of claims 23 to 32 wherein the receiving the second allocation of resources is in response to sending signaling in a medium access control, MAC, header. 10 INTERDIGITAL TECHNOLOGY CORPORATION WATERMARK PATENT & TRADE MARK ATTORNEYS P31569AU01