GB2502128A - Uplink resource selection based on service type - Google Patents

Uplink resource selection based on service type Download PDF

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Publication number
GB2502128A
GB2502128A GB1208709.4A GB201208709A GB2502128A GB 2502128 A GB2502128 A GB 2502128A GB 201208709 A GB201208709 A GB 201208709A GB 2502128 A GB2502128 A GB 2502128A
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United Kingdom
Prior art keywords
uplink resource
service type
message
uplink
user equipment
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
GB1208709.4A
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GB201208709D0 (en
Inventor
Keiichi Kubota
Brian Martin
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Renesas Electronics Corp
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Renesas Mobile Corp
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Priority to GB1208709.4A priority Critical patent/GB2502128A/en
Publication of GB201208709D0 publication Critical patent/GB201208709D0/en
Publication of GB2502128A publication Critical patent/GB2502128A/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0252—Traffic management, e.g. flow control or congestion control per individual bearer or channel
    • H04W28/0263—Traffic management, e.g. flow control or congestion control per individual bearer or channel involving mapping traffic to individual bearers or channels, e.g. traffic flow template [TFT]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/06—Reselecting a communication resource in the serving access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/008—Transmission of channel access control information with additional processing of random access related information at receiving side
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)

Abstract

A method of wireless communications comprises performing an uplink resource selection procedure 50 configured to determine a service type (52) of the data to be transmitted, and select an uplink resource from available uplink resources in response to the service type 54, 56, 58. Data is transmitted to a communications network element using the selected uplink resource. The selection may be selection between a R99 PRACH (Release 99 Physical Random Access Channel) or an E-DCH (Enhanced Dedicated Channel). The service type on which the selection is based may be to determine whether the service is for a circuit-switched call setup, a packet-switched connection setup, registration, an emergency call or for a low-priority connection. The selection is made by the User Equipment based on an indicated mapping received from system information 51.

Description

WIRELESS COMMUNICATION DEVICE,
METHOD AND COMPUTER PROGRAM
Technical Field
S The present invention relates to a wireless communication device, method and computer program. Embodiments of the present invention relate to the field of wireless communications, and particular embodiments relate to a system and method for uplink resource selection.
Background
The Third Generation Partnership Project (3GPP) unites six telecommunications standards bodies, known as "Organisational Partners," and provides their members with a stable environment to produce the highly succcssftil Reports and Specifications that define 3GPP technologies, including WCDMA (Wideband Code Division Multiple Access). These technologies are constantly evolving through what have become known as "generations" of commercial cellular/mobile systems. 3GPP also uses a system of parallel "releases" to provide developers with a stable platform for implementation and to allow for the addition of new features required by the market. Each release includes specific ifinctionality and features that are specified in detail by the version of the 3GPP standards associated with that release.
WCDMA began with Release 99 (R99) of 3GPP, and introduced High Speed Packet Access (HSPA) and High Speed lJplink Packet Access (HSUPA) as wireless access technologies. Universal Mobile Telecommunication System (UMTS) is an umbrella term for the third generation (3G) radio technologies developed within 3GPP and initially standardised in Release 99. UMTS includes specifications for both the IJMTS Terrestrial Radio Access Network (IJTRAN) as well as the Core Network.
The UTRAN includes at least one Radio Network Subsystem (RNS), which in turn includes a single Radio Network Controller (RNC) that controls at least one base station also known as Node B. In accordance with the Release 7 3GPP standards, wireless transmit'receive units (WTRU5) or the User Equipment (GE) may be in either idle state or connected state. Based on the WTRV's mobility and activity while in the connected state, a IX[RAN may direct the WTRU to transition between a number of sub-states: CELL_PCH (CELL Paging Channel), URA PCH (UTRAN Registration Area Paging Channel), CELL EACH (CELL Forward Access Channel), and CELL DCI-1 (CELL Dedicated Channel) states. Prior to Release 7, transition to CELL DCI-1 could take two seconds from the idle state and about 500 milliseconds from other states. The result was a delay in down-switches to avoid associated delays in up-switches, which led to high consumption of network resources and high rate of battery usage.
The need for higher throughput and lower latencies for data services drives the evolution of high speed packet access (HSPA). To support data services when a WTRIJ is in the CELL FACFI state, signalling channel transmission rates were increased to speed up the state changes. As a result, the transition to CELL DCH takes less than one second from the idle state and about 200 milliseconds from the other states. Other improvements increased user data rates, fast dormancy features, and reduced terminal power consumption in the CELL_EACH state.
In pre-Release 8 3GPP standards, uplink communication is achieved through a random access channel (RACH) mapped to a physical random access channel (PRACH). The RACH is a shared channel used for an initial access to obtain dedicated resources or to transmit small amounts of data. Because the RACH is shared and the access is random among WTRUs, there is a possibility of collision between two or more WTRUs trying to access the channel simultaneously.
3GPP Release 8 included a procedure known as Enhanced Uplink for CELL_FACH and IDLE Mode. In this enhancement, Node B would choose an E-DCH (Enhanced Dedicated Channel) resource from a set of common E-DCH resources that are shared among all WTRUs. The Node B responds to a WTRU channel access request by assigning one of these resources. The WTRU then starts transmission over the assigned E-DCH transport channel.
Currently there is an on-going Work Item FE-FACH (Further Enhancement to S CELL FACH) for 3GPP Release 11. More specifically, improvements of resource utilisation, throughput, latency and coverage related to uplink transmissions are being sought.
Summary
According to a first aspect of the present invention, there is provided a method of wireless communications for use in a user equipment, the method comprising: performing an uplink resource selection procedure configured to: determine a service type; and select an uplink resource from available uplink resources in response to the service type; and transmitting data to a communications network element using the selected uplink resource.
According to a second aspect of the present invention, there is provided a wireless communication device, the device comprising: a processing system constructed and arranged to cause the wircless communication device to perform: determining a service type, selecting an uplink resource from available uplink rcsourccs in rcsponse to thc scrvicc type, and transmitting data to a communications network element using the selected uplink resource.
There may be provided a wireless transmitter configured to transmit and receivc wireless signals. There may be provided means for transmitting and receiving wireless signals. The processing system may comprise a processor or processor means, and a memory coupled to the processor or processor means and configured to store program code that, when executed by the processor or processor means, cause the wireless communication device to operate as described above.
According to a third aspect of the present invention, there is provided a computer program comprising instructions that cause a wireless communication device: to perform an uplink resource selection procedure comprising: determining a service type; and selecting an uplink resource from available uplink resources in S response to the service type; and transmitting data to a communications network element using the selected uplink resource.
There may be provided a computer-readable medium having encoded thereon the instructions described above.
Further features and advantages of the invention will become apparent from the following description of preferred embodiments of the invention, given by way of example only, which is made with reference to the accompanying drawings.
Brief Description of the Drawings
FIG. I shows a simplified block diagram of a network structure of UMTS (Universal Mobile Telecommunications System); FIG. 2 shows a simplified state diagram of RRC (Radio Resource Control) states and transition between the states; FIG. 3 shows a simplified flowchart of an exemplary embodiment of a method ofuplinlc resource selection in CELL FACFI state; and FIG. 4 shows a simplified block diagram of an exemplary embodiment of a WTRU (Wireless Transmit/Receive Unit).
Detailed Description
FIG. 1 shows a simplified block diagram of a network structure of UMTS (Universal Mobile Telecommunications System) 10. A IJIIVITS 10 includes at least one user equipment (User Equipment) 12, a UMTS radio access network (UTRAN) 14 and a core network (CN) 16. The UTRAN includes at least one or more radio network subsystems (RNS) 1K Each RNS 18 includes a single radio network controller (RNC) 20 and at least one base station (Node B) 22. The RNC 20 manages the at least one base station 22. Each base station 22 includes one or more cells 24.
S In the protocol documents of the standardisation organisation 3GPP of the UMTS, there are TS25.2XX, TS25.3XX and other specifications relevant to the UThVITS radio interface protocol.
Thc uplink transmission channels that may bc utiliscd by a User Equipment 12 include RACH (Random Access Channel), E-DCH (Enhanced Dedicated Channel) and the like, and downlinlc transmission channels comprise BCI-1 (Broadcast Channel), PCH (Paging Channel), FACH (Forward Access Channel), DSCH (Downlink Shared Channel), HS-DSCH (High Speed Downlink Shared Channel), DCH and the like. The uplink and downlink transmission channels for carrying user data include RACH/FACH, DCH/DCH, DCHJ/(DCH+DSCFI), DCH/HS-DSCH, DCI-1/(DCI-l+HS-DSCH), E-DCH/DCI-l, E-DCI-1/I-1S-DSCH, and E-DCI-l/(DCI-l+I-1S-DSCH). Uplink physical channels include PRACH (Physical Random Access Channel), PCPCH (Physical Common Packet Channel), uplink DPCCH (Dedicated Physical Control Channel), uplink DPDCI-l (Dedicated Physical Data Channel), E-DPCCI-I (Enhanced Dedicated Physical Control Channel), E-DPDCI-l (Enhanced Dcdicatcd Physical Data Channcl) and the 111cc, downlink physical channcls include P-CCPCH (Primary Common Control Physical Channel), S-CCPCH (Secondary Common Control Physical Channel), PDSCH (Physical Downlinlc Shared Channel), downlink DPCCH, downlink DPDCH, HS-DPCCH (High Speed Dedicated Control Channel), HS-PDSCH (High Speed Physical Downlink Sharcd Channel) and thc like, and these physical channels have the corresponding relationships with the transmission channels, wherein the DPCH (Dedicated Physical Channel) is a general term of DPCCH/DPDCH. Further, the downlink includes SCH (Synchronization Channel), CPICH (Common Pilot Channel), AICH (Acquisition Indicator Channel), PICH (Paging Indication Channel), F-DPCH (Fractional Dedicated Physical Channel), 1-IS-SCCI-1 (High Speed Shared Control Channel), AGO-I (Absolute Grant Channel), RGCH (Relative Grant Channel) and the like, all of which are part of the physical layer.
In a WCDMA system, an R99 User Equipment that is in a CELL DCH state S transmits a large amount of data using a DCH and a Release 6 User Equipment transmits a large amount of data using an E-DCH/HS-DSCH. The R99 User Equipment transmits data using an RACH in an IDLE mode or a CELL_EACH state.
The CELL EACH state is a state in which a dedicated physical channel has not been allocated to the User Equipment and the User Equipment uses a common transmission channel although an Radio Resource Control (RRC) connection has been established.
However, in the CELL EACH state, the User Equipment can transmit data using a dedicated logical channel. The CELL_EACH state is generally used when the amount of traffic exchanged between the User Equipment and the UTRAN is small. The User Equipment receives data while monitoring a FACH and uses a RACH when transmitting data in uplink. When the User Equipment is in the CELL_EACH state, the User Equipment can receive system information over a BCI-1 (Broadcast Channel).
Since the User Equipment in the CELL FACH state uses a common transmission channel, a Radio Network Temporary Identifier (RNTI) information for User Equipment identification may be included in a MAC header of the transmission.
Since data transmission is possible through the RACH although no RRC connection has been established, the RACH has a small signalling delay time, compared to the E-DCH. For HTTP transmission or keep alive message transmission, a common E-DCH, which achieves the advantages of both the RACH and the E-DCH, such as rapid signalling and large data transmission capacity, was proposed in an Enhanced Uplink for CELL FACH state for FDD" Work Item (WI).
Generafly, the RACH has been used to transmit short1ength data in the uplink direction. Logical channels such as Common Control Channel (CCCH), Dedicated Control Channel (DCCH) or Dedicated Traffic Channel (DTCH) can be mapped to a RACH. The RACH can be mapped to a physical channel, e.g. a Physical Random Access Channel (PRACH).
FIG. 2 shows a simplified state diagram 30 of RRC (Radio Resource Control) states and transition between the states. The state diagram 30 shows the RRC states in UTRA (Universal Terrestrial Radio Access) RRC Connected Mode 32, including S transitions between UTRA RRC Connected Mode 32 and GSM Connected Mode 34 for CS (Circuit-Switched) domain services, and between UlTRA RRC Connected Mode 32 and GSM/GPRS Packet Modes 36 or E-UTRA RRC Connected Mode 38 for PS (Packet-Switched) domain services. It also shows the transitions between Idle Mode 40 and UTRA RRC Connected Mode 32 and furthermore the state transitions within the UlTRA RRC Connected Mode 32.
A User Equipment 12 is in the RRC Connected Mode when the RRC layer of the User Equipment 12 and the RRC layer of a corresponding RINC 20 are connected, such that bi-directional transfer of RRC messages are transmitted and received. If there is no RRC connection, the User Equipment 12 is said to be in the RRC Idle Mode 40. Upon power-up, the User Equipment 12 is in the Idle Mode 40 by default, and it transitions to RRC Connected Mode 32 via RRC connection procedures. An RRC connection is established, for example, when uplink data transfer is needed to make a CS voice call, PS data transfer, or for registration. The RRC connection connects the User Equipment 12 to the RNC 20 of the UTRANI4.
As shown in FIG. 2, the UlTRA RRC Connected Mode 32 includes four states: the URA PCH (UTRAN Registration Area Paging Channel) state 42, CELL PCH (CELL Paging Channel) state 44, CELL_EACH (CELL Forward Access Channel) state 46, and CELL_DCH (CELL Dedicated Channel) state 48. Depending on the state, the User Equipment 12 is configured to perform a variety of actions and monitors different channels. The RRC states within the UTRA RRC Connected Mode reflect the level of User Equipment connection and which transport channels that can be used by the User Equipment. In the URA PCH 42 or CELL_PCH 44 state, the User Equipment 12 performs a number of functions, such as maintaining up-to-date system information that is broadcast by the serving cell, selecting and reselecting cell, and periodically searching for higher priority PLMNs (Public Land Mobile Networks).
After power on, the User Equipment stays in Idle Mode until it transmits a S request to establish an RRC Connection. In Idle Mode the connection of the User Equipment is closed on all layers of the access stratum. In Idle Mode the User Equipment is identified by non-access stratum identities such as IMSI, TMSI and P-TMSI. In addition, the UTRAN has no information about the individual Idle Mode Uscr Equipments, and it can only address, e.g. all Uscr Equipment in a cdl or all User Equipment monitoring a paging occasion. The UTRA RRC Connected Mode is entered by the User Equipment when the RRC Connection is established. The User Equipment is assigned a radio network temporary identity (RNTI) to be used as User Equipment identity on common transport channels. The RRC states within the UTRA RRC Connected Mode reflect the level of User Equipment connection and which transport channels that can be used by the User Equipment. When the User Equipment receives a message from the network that confirms that the RRC connection has been established, the User Equipment enters the CELL FACH or CELL_DCH state of the UTRA RRC Connected Mode. In the case of a failure to establish the RRC Connection, the User Equipment goes back to the Idle Mode.
Possible causes for a failed RRC connection include radio link failure, a received rejcct response from the network, or lack of response from the network (timeout).
When in the CELL_EACH state 46, a dedicated physical channel has not been allocated to the User Equipment 12. The User Equipment is assigned a default common or shared transport channel in the uplink, e.g. RACH or common E-DCH, which it can use at times specified by the access procedure for that transport channel.
In the CELL EACH state, the location of the User Equipment is known on the cell level. A cell update procedure is used to report to the IX[RAN when the User Equipment selects a new cell to observe its common downlink channels. Downlink data transmission on the EACH or HS-DSCH can be started without prior paging.
The User Equipment monitors the broadcast channel and system information on BCCH of its own and neighbouring cells and from this observation the need for the updating of cell location is determined. The User Equipment performs cell reselection and, upon selecting a new UTRA cell, initiates a cell update procedure. Upon S selecting a new cell belonging to another radio access system, the User Equipment enters idle mode and makes an access to that system according to its specifications.
The User Equipment once again reads the BCH to acquire valid system information.
For each acquisition, the User Equipment may need different combinations of system information broadcast on BCH. The scheduling on the broadcast channel is done in such way that the User Equipment knows when the needed information can be found.
When the system information is modified, the scheduling information is updated to reflect the changes in system information transmitted on BCFI. The new scheduling information is broadcast on BCH and the notification of the system information modification is sent on FACH andlor on the common HS-DSCH in order to inform User Equipments about the changes. If the changes are applicable for the User Equipment, the modified system information is read on BCH.
In particular, according to 3GPP TS 25.331, vll.1.0, the User Equipment 12, while in the CELL_EACH state 46, is configured to perform the following actions: 1> if the UE is "in service area": 2> maintain up-to-date system information as broadcast by the serving cell; 2> perform cell reselection process 2> perform measurements process according to measurement control information; 2> run timer T305 (periodical cell update); 2> s&cct and configure the RB multiplexing options applicable for the transport channels to be used in this RRC state; 2> for 3.84 Mcps and 7.68 Mcps TDD; or 2> for FDD and 1.28 Mcps TDD, if the UE does not support HS-DSCH reception in CELL_FACI-1 state; or 2> if thc IE "HS-DSCH common system information" is not included in System Information Block type 5 or System Information Block type Sbis; or 2> for 1.28 Mcps TDD, if the IE "common E-DCH system info" is not included in System Information Block type 5: 3> listen to all FACH transport channels mapped on the S-CCPCH selected by the UE.
2> else: 3> if variable I-I RNTI is sct: 4> rcccivc physical channels HS-SCCH(s) using thc value of thc variable HRNTT as UE identity and parameters given by the IE(s) "HS-DSCH common system information." 3> else: 4> if the variable HS DSCH RECEPTION OF CCCH ENABLED or the variable HS DSCH RECEPTION OF ETWS ENABLED is set to TRUE: 5> receive physical channel(s) of type HS-SCCH with selected common F1-RNTI using parameters given by the IE(s) "FIS-DSCH common system information." 2> act on RRC messages received on BCCH, CCCH and DCCH; 2> act on RRC messages received on MCCFI if it supports MBMS and has activated an MBMS service; 2> act on RRC messages received on, if available, SHCCH (TDD only).
1> if the TJE is "out of service area": 2> perform cell selection process; 2> run timers T305 (periodical cell update), and T3l7 (cell update when re-entering "in service") or T307 (transition to Idle mode), if started; 2> run timers T314 and/orT3lS, if started; 2> if the cell selection process fails to find a suitable cell after a complete scan of all RATs and all frequency bands supported by the UE, the tiE shall after a minimum of TimerOutOfService time (default value 30 seconds) of being "out of service area": 3> indicate all available PLMNs to NAS to enable the selection of a new PLMN; 3> if an acceptable cell is found then the UE shall camp on that cell to obtain limited service and perform actions; 3> else if no acceptable cell is found, the UE shall continue looking for an
acceptable cell.
Enhanced Uplink and Downlink in CELL_EACH were introduced in Release 8 and Release 7, respectively, to allow a User Equipment to receive data over common logical channels over HS-DSCH (High Speed Downlink Shared Channel) and send data over common E-DCH (Enhanced Dedicated Channel) resource instead of RACH (Random Access Channel). Therefore, depending on the User Equipment capabilities, the random access can be a R99 PRACH access or Enhanced Random Access for common E-DCH resources. According to current 3GPP pre-RI 1 specifications, if both the User Equipment and Node B support Enhanced Uplink in CELL-EACH state and idle mode, this is the mandated access common E-DCH resource when the User Equipment is in the CELL_FACH state. However, a current Work Item called Further Enhancement to CELL_FACH investigates resource utilisation, throughput, latency and coverage improvements in the uplink, including fallbaclc to R99 PRACH.
More particularly, at 3GPP TSG RAN WG2 Meeting #74 that took place over May 9-13, 2011, three reports were submitted for discussion: R2-112853, R2-113011, and R2-113169. In R2-112853, results were submitted of a simulation in which User Equipment were instructed to usc R99 PRACH if they fail to secure a resource for uplink data transmission, i.e. encounter a call block state. The results show that when the number of user equipment in a cell is large, the amount of time the User Equipment spends in call-blocked state using R99 PRACH is significantly less when compared with User Equipment instructed to use E-DCH. The R2-1 13011 reports that network resources can be used more efficiently if R99 PRACH is used if the amount of data to be transmitted uplink is "small enough, i.e., smaller than 360 bits." The Ri-i 13169 report suggests setting a threshold, such that messages smaller than the threshold size should be transmitted by the User Equipment using R99 PRACH, and messages greater than the threshold should be transmitted using the enhanced uplink channel.
S
Accordingly, the present disclosure is related to a system and method of selecting uplink access in three situations while the User Equipment is in the CELL_EACH state. The User Equipment is configured or arranged to select between R99 PRACH and E-DCH depending on the service type. For example: 1. set up a CS voice call connection using R99 PRACH for any uplink access; 2. set up a PS connection using common E-DCH for any uplink access and 3. perform registration using R99 PRACH for any uplink access.
For uplink user or control data flnsmissions while the User Equipment is in the CELL EACH state, the above radio resource allocation procedure is performed to determine whether R99 PRACFI or E-DCFI should be used. For example, the User Equipment is instructed to use R99 PRACH for transmission of short messages while in the CELL FACH state such as RRCConnectionRequest message, CellUpdate message, InitialDirectTransfer message, UplinkDirectTransfcr message, and any reconfiguration complete messages while a CS voice call is being established in CELL FACH state or idle mode.
FIG. 3 is a simplified flowchart ofan embodiment ofa method 50 ofan uplink resource selection in the CELL FACH state. In optional block 51, a determination is made as to whether a network configuration for the uplink resource selection is indicated in the system information broadcasted or otherwise transmitted to the User Equipment. Optionafly, the system information may include a mapping between the service type and the uplink resource to be used by the User Equipment. The User Equipment may perform the uplink resource selection only when the network configures it in system information. In block 52, a determination is made as to the service type of the action being considered. The uplink resource selection is then made in response to the service type. For example, if the User Equipment is to set up a CS call, as determined in block 52, the R99 PRACH resource is selected for uplink access in block 54. If the User Equipment is to set up a PS connection or call, as determined in block 52, the E-DCH resource is selected for uplink access in block 56.
As further a further example, if the User Equipment is to perform a registration procedure, such as Location Updating procedure and/or Routing Area Updating procedure, a selection of the R99 PRACFI resource is performed in block 58. The subsequent uplink data transmission is then performed using the selected resource.
Thc above service typcs arc provided as examples. Thc selection between R99 PRACH and E-DCH may be performed based on other service types not explicitly identified herein.
FIG. 4 is a simplified block diagram of an exemplary WTRU 70 or User Equipment configured or arranged to select R99 PRACH for uplink access as described above. The WTRIJ 70 includes a processor 72, a transceiver 74, a transmit/receive clement 76, and may further include a speaker/microphone 78, a keypad 80, a display'touchpad 82, non-removable memory 84, removable memory 86, a power source 88, a global positioning system (GPS) chipset 90, and other peripherals 92.
The processor 72 may be a general purpose processor, a special purpose 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 Array (FPGA5) circuits, any other type of integrated circuit (IC), a state machine, and the like. The processor 72 may perform signal coding, data processing, power control, input/output processing, and/or any other functionality that enables the WTRU 70 to operate in a wireless environment. The processor 72 may be coupled to the transceiver 74, which may be coupled to the transmit/receive element 76. While FIG. 4 depicts the processor 72 and the transceiver 74 as separate components, it should be appreciated that the processor 72 and the transceiver 74 may be integrated together in an electronic package or chip.
The transmit/receive element 76 is configured to transmit signals to, or receive S signals from, a base station over the air interface. For example, in one embodiment, the transmit/receive element 76 may be an antenna configured to transmit and/or receive RF (radio frequency) signals. In another embodiment, the transmit/receive element 76 may be an emitter/detector configured to transmit and/or receive IR (infrared), LV (ultra-violet), visible light signals, and/or a combination thereof. It will be appreciated that the transmit/receive element 76 may be configured to transmit and/or receive any combination of wireless signals. In addition, although the transmit/receive element 76 is depicted in FIG. 4 as a single element, the WTRIJ 70 may include any number of transmit/receive elements 76. More specifically, the WTRU 70 may employ MIMO (multiple input multiple output) technology. Thus, in one embodiment, the WTRU 70 may include two or more transmit/receive elements 76 (e.g., multiple antennas) for transmitting and receiving wireless signals over the air interface. The transceiver 74 may be configured to modulate the signals that are to be transmitted by the transmit/receive element 76 and to demodulate the signals that are received by the transmit/receive clement 76. As noted above, the WTRU 70 may have multi-mode capabilities. Thus, the transceiver 74 may include multiple transceivers for enabling the WIRU 70 to communicate via multiplc RATs, such as IJ[RA and IEEE 802.11 (commonly called WiFi), for example.
The processor 72 of the WTRU 70 may be coupled to, and may receive user input data from, the speaker/microphone 78, the keypad 80, and/or the display/touchpad 82 (e.g. a liquid crystal display (LCD) display unit or organic light-emitting diode (OLED) display unit). The processor 72 may also output user data to the speaker/microphone 78, the keypad 80, and/or the display/touchpad 82. In addition, the processor 72 may access information from, and store data in, any type of suitable memory, such as the non-removable memory 84 and/or the removable memory 86. The non-removable memory 84 may include random-access memory (RAM), read-only memory (ROM), a hard disk, or any other type of memory storage device. The removable memory 86 may include a subscriber identity module (SIM card, a memory stick, a secure digital (SD) memory card, and the like. In other embodiments, the processor 72 may access information from, and store data in, S memory that is not physically located on the WIRU 70, and instead located elsewhere such as on a server or a home computer (not shown). The non-removable memory 84 and/or the removable memory 86 arc configured to store myriad typcs of data, including computer program instructions, control data, status data, and user data (e.g. text, images, video, audio, songs, emails, records, and files).
The processor 72 may receive power from the power source 88, and may be configured to distribute and/or control the power to the other components in the WTRU 70. The power source 88 may be any suitable device for powering the WTRU 70. For example, the power source 88 may include one or more dry cell batteries (e.g. nickel-cadmium (NiCd), nickel-zinc (NiZn), nickel metal hydride (NiMH), lithium-ion (Li-ion), etc.), solar cells, fuel cells, and thc like. The processor 72 may also be coupled to the GPS chipset 90, which may be configured to provide location information (e.g., longitude, latitude, and altitude) regarding the current location of the WTRIJ 70. In addition to, or in lieu of, the information from the OPS chipset 90, the WTRU 70 may receive location information over the air intcrface from a base station and/or determine its location based on the timing of the signals being received from two or more nearby base stations. It will be appreciated that the WTRU 70 may acquire location information by way of any suitable location-determination method while remaining consistent with an embodiment. The processor 72 may further be coupled to other peripherals 92, which may includc onc or more software, firmware, and/or hardware modules that provide additional features, functionality and/or wired or wireless connectivity. For example, the peripherals 92 may include an accelerometer, an c-compass, a satellite transceiver, a digital camcra (for photographs and/or video), a universal serial bus (USB) port, a vibration device, a television transceiver, a hands free headset, a Bluetooth't1M module, a frequency modulated (FM) radio unit, a digital music player, a media player, a video game player module, an Internet browser, and the like.
When referred to herein, the terminology "wireless transmit/receive unit S (WTRU)" includes but is not limited to a user equipment (UE), a mobile station, a fixed or mobile subscriber unit, a pager, a cellular telephone, a personal digital assistant (PDA), a computer, a laptop, a portable device, or any other type of user device capable of transmitting andlor receiving wireless signals and operating in a wireless environment. When referred to herein, the terminology "base station" includes but is not limited to a Node-B, an evolved Node-B, a site controller, an access point (AP), or any other type of interfacing device capable of operating in a wireless environment.
The above embodiments are to be understood as illustrative examples of the invention. Further embodiments of the invention are envisaged. It is to be understood that any feature described in relation to any one embodiment may be used alone, or in combination with other features described, and may also be used in combination with one or more features of any other of the embodiments, or any combination of any other of the embodiments. Furthermore, equivalents and modifications not described above may also be employed without departing from the scope of the invention, which is defined in the accompanying claims.

Claims (22)

  1. CLAIMS1. A method of wireless communications for use in a user equipment, the method comprising: S performing an uplink resource selection procedure arranged to: determine a service type; and select an uplink rcsourcc from available uplink resources in response to the service type; and transmitting data to a communications network clemcnt using thc sclcctcd uplink resource.
  2. 2. A method according to claim 1, wherein the uplink resource selection procedure is arranged to receive system information indicative of a mapping between a service type and an uplink resource.
  3. 3. A method according to claim I or claim 2, wherein the uplink resource selection procedure is arranged to select between an R99 PRACH and an E-DCH as an uplink resource in response to the service type.
  4. 4. A method according to any of claims I to 3, wherein the service type is sclcctcd from the group consisting of circuit-switched call setup, packct-switchcd connection setup, registration, emergency call, and low priority connection.
  5. 5. A method according to any of claims I to 4, comprising operating in one of the CELL FACH state and idle mode.
  6. 6. A method according to any of claims I to 5, wherein transmitting data comprises transmitting a message selected from the group consisting of RRCConnectionRequest message, CellUpdate message, InitialDirectTransfer message, UplinkDirectTransfer message, and any reconfiguration complete messages.
  7. 7. A method according to any of claims 1 to 6, wherein transmitting data comprises transmitting at least one of control data and user data.
  8. 8. A wireless communication device, the device comprising: S a processing system constructed and arranged to cause the wireless communication device to perform: determining a service type; selecting an uplink resource from available uplink resources in response to the scrvicc type; and transmitting data to a communications network element using the selected uplink resource.
  9. 9. A device according to claim 8, wherein the processing system is arranged to cause the wireless communication device to perform receiving system information indicative of a mapping between a service type and an uplink resource.
  10. 10. A device according to claim 8 or claim 9, wherein the uplink resource selection procedure is arranged to select between an R99 PRACH and an E-DCH as an uplink resource in response to the service type.
  11. 11. A dcvicc according to any of claims 8 to 10, whcrcin the scrvicc type is selected from the group consisting of circuit-switched call setup, packet-switched connection setup, registration, emergency call, and low priority connection.
  12. 12. A device according to any of claims 8 to 11, wherein the device is arranged to operate in one of the CELL_EACH state and idle mode.
  13. 13. A device according to any of claims 8 to 12, arranged to transmit, using the R99 PRACH, a message selected from the group consisting of RRCConnectionRequest message, CellUpdate message, InitialDirectTransfer message, lJplinkDirectTransfer message, and any reconfiguration complete messages.
  14. 14. A computer program comprising instructions that cause a wireless communication device to: perform an uplink resource selection procedure comprising: S determining a service type; and selecting an uplink resource from available uplink resources in response to the service type; and transmit data to a communications network element using the selected uplink resource.
  15. 15. A computer program according to claim 14, comprising instructions such that the wireless communication device receives system information indicative of a mapping between a service type and an uplink resource.
  16. 16. A computer program according to claim 14 or claim 15, comprising instructions such that the uplink resource selection procedure is arranged to select between an R99 PEACH and an E-DCH as an uplink resource in response to the service type.
  17. 17. A computer program according to any of claims 14 to 16, comprising instructions such that the wireless communication dcvicc opcratcs in one of thc CELL FACH state and idle mode while performing the uplink resource selection procedure.
  18. 18. A computer program according to any of claims 14 to 17, comprising instructions such that the service type is selected from the group consisting of circuit-switched call setup, packet-switched connection setup, registration, emergency call, and low priority connection.
  19. 19. A computer program according to any of claims 14 to 18, comprising instructions such that transmitting data comprises transmitting a message selected from the group consisting of RRCConnectionRequest message, Cellupdate message, InitialDirectTransfer message, TJplinkDirectTransfer message, and any reconfiguration complete messages.
  20. 20. A computer program according to any of claims 14 to 19, comprising instructions such that transmitting data comprises transmitting at least one of control data and user data.
  21. 21. A wireless dcvicc, substantially in accordance with any of thc examples as described herein with reference to and illustrated by Figures 3 and 4 of the accompanying drawings.
  22. 22. A method of operating a wireless device, substantially in accordance with any of the examples as described herein with reference to and illustrated by Figures 3 and 4 of the accompanying drawings.
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