Wireless communication method and apparatus for reporting traffic volume measurement information to support enhanced uplink data transmissions

[0001] FIELD OF THE INVENTION [0002] The present invention relates to a wireless system comprising a wireless transmit / receive (WTRU) and a particular type node, the present invention relates to uplink (EU) traffic flow measurement information (TVM) to support EU data transmission between the WTRU and the Node-B node via a limited capacity signaling channel.

[0003] BACKGROUND [0004] Methods for extending uplink (UL) coverage area, bandwidth and transmission delay in a wireless communication system, such as a frequency division system in duplex mode (FDD), are currently being tested in version 6 (R6) of the Partner Project Third Generation (3GPP). Instead of scheduling and assigning uplink physical channels in the radio network controller (RNC), a Node-B node controller (i.e. base station) in such a way that more efficient decisions can be made and uplink radio resources can be managed on a short-term basis better than an RNC controller, even if the RNC controller maintains total control over the system. A similar solution has already been adopted in the downlink for version 5 (R5) access with fast data packet transmission (HSDPA) in the universal mobile telecommunications system (UMTS) for both FDD mode and time division duplex (TDD) mode.

[0005] In order for a Node-B node to make effective decisions regarding allocation and prioritization between flows of different priorities, the Node-B node must track the TVM measurement along with the associated priority. However, conventional UL signaling methods have

Limited possibilities, and thus they may not be able to cover TVM measurement reporting with associated priorities.

[0006] EP 1 257 140 discloses a multi-access protocol in which packet data mobile stations make requests for uplink channel resources. Request messages sent by mobile stations inform the base station of the service parameters. Examples of such service parameters are: available transmission power in a mobile station, the amount of data to be transmitted and the quality of the service.

[0007] 3GPP TR 25.896 V1.1.0, 6th edition, describes "a feasibility study for enhanced uplink for UTRA FDD" (feasibility study for extended uplink for the UTRA FDD system).

[0008] EP 1 231 807 discloses controlling the reverse link data rate in a mobile communication system by determining the level of interference at the base station due to signals from all mobile stations served by the base station and determining the level of transmission energy required for each station mobile.

[0009] Samsung in the 3GPP TSG-RAN WG1 # 35 document from the meeting discusses "TP on uplink signalling of scheduling information update" ("Text proposal regarding uplink signaling for scheduling information update").

[0010] Qualcomm Europe in 3GPP TSG-RAN1 # 35 discusses the "reference Node-B scheduler for EUL" (Node-B reference scheduler for EUL link).

SUMMARY OF THE INVENTION [0012] The present invention is a wireless communication method and device for reporting EUM TVM measurement information to support EU data transmission between a WTRU (i.e. a mobile station) and a Node-B node. The device can be a communication system

53 / 59P28869EN00 wireless unit, WTRU and / or integrated circuit (IC). EU link data is generated and stored in the WTRU entity's buffer. The WTRU sends the initial TVM measurement information request message to the Node-B indicating that the WTRU has EU data to be sent to the Node-B. In response to receiving the initial TVM measurement request information message, the Node-B node schedules one or more allowed UE data transmissions between the WTRU and the Node-B node by sending the EU data link scheduling message to the WTRU.

[0013] The WTRU sends all EU data stored in the buffer to the Node-B if the allowed EU data transmissions are sufficient to support the transmission of all EU data stored in the buffer. Otherwise, the WTRU may send detailed TVM measurement information multiplexed with at least part of the EU data to the Node-B type node.

[0014] The TVM measurement information may indicate the amount of EU data stored. Detailed TVM measurement information may indicate the amount of buffered EU data associated with each of the many traffic priority classes. Detailed information about the TVM measurement can be multiplexed in layer 2 of the media access control unit (MAC) or in layer 3 of radio resource control (RRC) or other equivalent layer 3 of the signaling unit.

[0015] The procedure used to transfer EU link data stored in the WTRU entity buffer may depend on whether or not the amount of EU link data exceeds a predetermined threshold. The initial TVM measurement request information message may be sent to a Node-B node only after the amount of EU data stored exceeds the established threshold. When the threshold set is not exceeded, the WTRU may send all EU data from the WTRU buffer to a type node

53 / 59P28869EN00 implemented storage

Node-B without having to serialize information from a Node-B node. If the threshold set is set to zero, the WTRU may send EU data stored from the WTRU buffer to the Node-B node only after receiving the scheduling information from the Node-B node.

In accordance with the first aspect of the present invention, a method of reporting TVM measurement information is provided in a WTRU characterized by: EU link data in a buffer; sending an initial TVM measurement request information message indicating that the WTRU has EU data to send; receiving an EU data scheduling message; multiplexing of at least the buffer stored in the TVM measurement, the detailed information about the TVM measurement includes identification of the logical channel having the assigned priority and the amount of EU data stored in the buffer assigned to the logical channel, wherein at least part of the EU data stored in the buffer is multiplexed with detailed information about TVM measurement in MAC layer; and transmitting the multiplexed at least part of the EU data and detailed information about the TVM measurement.

parts of EU link data with detailed information on

In accordance with another aspect of the present invention, there is provided a WTRU comprising: a buffer; and characterized in that it further comprises: an arrangement configured to store EU link data in the buffer; a circuit configured to send an initial TVM measurement information request message indicating that the WTRU has EU data to send; a circuit configured to receive an EU data scheduling message; a system configured to multiplex at least part of the EU data stored in the buffer with detailed information about the TVM measurement, with detailed information about the TVM measurement

Include identifying the logical channel having the assigned priority and the amount of EU data stored in the buffer assigned to the logical channel, wherein at least part of the EU data stored in the buffer is multiplexed with detailed TVM measurement information on the MAC layer; and a circuit configured to transmit multiplexed at least part of the EU data and detailed information about the TVM measurement.

[0016] BRIEF DESCRIPTION OF THE DRAWING (FIGURES) [0017] A more detailed understanding of the invention can be obtained from the following description of a preferred example, given as an example and which should be considered in conjunction with the attached drawing, in which:

[0018] Figure 1 shows a wireless communication system operating in accordance with the present invention; [0019] Figure 2 is a signal flow diagram for the system of Figure 1 when more than one UE link transmission is necessary to transmit all UE data buffered in the WTRU;

[0020] Figure 3 is a signal flow diagram for the system of Figure 1 when only one UE link transmission is necessary to transmit all UE data buffered in the WTRU; and [0021] Figure 4 is a flowchart of a process comprising method steps for implementing TVM measurement reporting in accordance with the present invention.

[0022] DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT (EXAMPLES) [0023] In the following, the term "WTRU unit" includes user equipment (UE), a mobile station, a stationary or mobile subscriber unit, a pager or any other type of device capable of operating in a wireless environment , but is not limited to those listed.

[0024] When reference is made to "Node-B" in the description below, it includes a base station, site controller, access point, or any other type of device providing connection in a wireless environment, but is not limited to .

[0025] The present invention may further be used in TDD, FDD mode, as well as in time-synchronous code-sharing multi-access (TD-SCDMA), as used for UMTS, CDMA 2000 and CDMA in general, but it is envisaged also use in other wireless systems.

[0026] The features of the present invention may be included in an IC or be configured in a system comprising a plurality of interconnected components.

[0027] Figure 1 shows a wireless communication system 100 operating in accordance with the present invention. System 100 includes a WTRU 105 unit and a Node-B 110 node that communicate with each other via wireless signals 115. The WTRU 105 unit includes at least one buffer 120.

[0028] Figure 2 is a signal flow diagram of a wireless communication system 100 when EU data transmissions allowed by the first EU data scheduling message are not sufficient to transmit all EU data stored in buffer 120 of WTRU 105. EU data 205 is generated in the WTRU 105 unit and stored in the buffer 120 of the WTRU 105 unit. When the amount of EU data in the buffer 120 exceeds the established threshold value of the EU data buffer, then the WTRU 105 sends the initial TVM measurement initial information request message 210 to the Node-B 110 via the EU signaling channel. Due to the limited content transfer capacity on the EU signaling channel, detailed TVM measurement information cannot be included

In the initial message 210 requesting preliminary information about the TVM measurement. The initial TVM measurement information message may after

210 Initial requests simply indicate that the WTRU 105 has EU link data ready to be sent, requesting the baud rate to the node including approximate amount of data

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still to Figure 2, after receiving the initial TVM measurement information request message 210, the Node-B 110 schedules one or more EU link transmissions between the WTRU 105 and the Node-B 110 via the first scheduling message 215 EU link data. In response to receiving the first EU data scheduling message 215, the WTRU 105 performs one or more EU data transmissions 220 to the Node-B 110 allowed by the first EU data scheduling message 215. If the EU data transmissions arranged by the Node-B 110 node are not sufficient to transmit all EU data buffered in the WTRU 105, then the WTRU 105 performs EU data transmissions 220 containing detailed TVM measurement information that indicates approximate amount of data buffered in the WTRU 105 unit. Optionally, detailed TVM measurement information may indicate the amount of buffered data associated with each assigned traffic priority class or logical channel mapped to a dedicated EU link channel (EU-DCH). Detailed TVM measurement information can be multiplexed in Layer 2 or Layer 3 with EU link data. In Layer 2, detailed TVM measurement information can be identified in the EU-DCH MAC header, and in Layer 3, detailed TVM measurement information can be signaled as part of Radio Resource Control (RRC) or another equivalent Layer 3 signaling unit. Transmissions 220

The EU link data may include several independent physical transmissions.

[0030] The Node-B 110 may use full knowledge of TVM measurement information and potentially assigned priorities and / or logical channels reported via EU data transmission 220 in subsequent uplink scheduling. When the WTRU 105 obtains additional EU data at a later time, then the WTRU 105 may decide to report updated TVM measurement information to the NodeB 110 node. The Node-B 110 node then schedules subsequent EU link data transmissions from the WTRU 105 to the Node-B 110 node with subsequent messages 225a to 225n of EU link data scheduling.

[0031] Figure 3 is a signal flow diagram of a wireless communication system 100 when one or more EU data transmissions allowed by an EU data scheduling message are sufficient to send all EU data stored in buffer 120 in WTRU 105. Data 305 EU links are generated in the WTRU 105 and are stored in buffer 120 of the WTRU 105. When the amount of EU data in the buffer 120 exceeds the established threshold value of the EU data buffer, then the WTRU 105 sends the initial TVM measurement information request message 310 to the Node-B 110 via the EU link signaling channel.

[0032] EU data transmissions sent by WTRU 105 need not be serialized by a Node-B 110 when the established EU data buffer threshold is not exceeded.

[0033] Referring still to Figure 3, after receiving the initial TVM measurement information request message 310, the Node-B node schedules one or more EU data transmissions between the WTRU 105 and

Node-B by means of an EU data scheduler message. In response to receiving the EU data scheduling message 315, the WTRU 105 performs one or more EU 320 data transmissions allowed by the EU data scheduling message 315. If the EU transmissions allowed by the EU data scheduler 315 are sufficient to send all EU data buffered in the WTRU 105, then all EU data stored in the buffer 120 of the WTRU 105 are sent to a Node-B. There is no need for additional TVM measurement reporting because the WTRU 105 is aware that there is no additional EU data to be sent to the Node-B 110.

[0034] Priority class data or logical channels / MAC-d flows associated with TVM measurements can be stored on the Node-B 110 for more precise channel assignment and more efficient use of radio resources. The Node-B 110 uses TVM measurements and associated priorities to establish subsequent scheduling of EU data with greater accuracy due to the additional TVM measurement details provided by the WTRU 105.

[0035] Figure 4 is a flowchart of a process 400 comprising the steps of a method for transmitting user data from the WTRU 105 to a Node-B 110 in accordance with the present invention. In step 405, EU data is generated and stored in buffer 120 of WTRU 105 unit. In optional step 410, it is determined whether the amount of EU data stored in buffer 120 of WTRU 105 exceeds the established EU data buffer threshold or not. When the amount of EU data stored in the WTRU 105 buffer 120 does not exceed the set threshold, EU transmissions are allowed without scheduling the node

53 / 59P28869PL00

Node-B, and all stored EU data is transferred to a Node-B 110 (step 430). If the amount of EU data stored exceeds the set threshold, then the WTRU 105 sends the initial TVM measurement information request message to the Node-B 110 indicating that the WTRU 105 has EU data to be sent to the Node-B 110 ( step 415).

[0036] It should be noted that the established EU data buffer threshold may be set to zero. In this case, storing any amount of EU data in the buffer 120 units will always result

WTRU 105 sending the initial TVM information request message 210.

[0037] Referring still to Figure 4, in step

420, the Node-B 110 sends the EU data scheduling message, containing information regarding one or more allowed EU data transmissions, to the WTRU 105 to schedule the EU data buffered in the WTRU 105 to the Node-B node 110. In step 425, the WTRU unit 105 determines whether the allowed EU data transmissions are sufficient to send all the buffered EU data. If the EU data transmissions allowed by the scheduling are sufficient for all EU data stored in the buffer 120, then all EU data buffered in the WTRU 105 are sent to the Node-B 110 in the allowed EU data transmissions (step 430).

[0038] If the EU data transmissions allowed by the current scheduling information are not sufficient to send all EU data buffered in the WTRU 105, then the WTRU 105 performs one or more EU data transmissions containing detailed information about the measurement and service information current transmission

TVM

53 / 59P28869EN00 multiplexed with part of the stored EU data to the Node-B 110 (step 435). At step 440, type node

Node-B 110 schedules and performs one or more additional EU data transmissions as long as in the unit

WTRU 105 will not remain any more buffered EU data.

[0039] Although the present invention has been illustrated and described particularly with reference to preferred embodiments, it will be understood by the art that form and detail can be made without departing from the above described invention.

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