MXPA06005240A - Method and system for transferring wireless transmit/receive unit-specific information - Google Patents

Abstract

The present invention is related to a method and system for transferring wireless transmit/receive unit (WTRU)-specific information to support enhanced uplink (EU) operation in a wireless communication system. A radio network controller (RNC) obtains WTRU-specific information, and transfers the WTRU-specific information to the Node-Bs. Each Node-B is configured to schedule uplink transmissions from a WTRU and utilizes the WTRU-specific information in operation of EU transmissions.

Description

METHOD AND SYSTEM TO TRANSFER SPECIFIC INFORMATION FOR WIRELESS TRANSMISSION / RECEPTION UNIT FIELD OF THE INVENTION The present invention relates to a wireless communication system. More particularly, the present invention is a method and system for transferring specific information for wireless transmission / reception unit (WTRÜ).

BACKGROUND In wireless communication systems that implement the standards of the Third Generation Partnership Project (3GPP), the Radio Network Controller (RNC) maintains general control of transmissions to the WTRÜ and knows the capabilities of each WTRü. However, the current scheme often has problems with production and transmission latency. To improve with respect to the current scheme, it is possible to depend on the Node Bs to program and assign uplink radio resources (UL) to the WTRUs. Nodes B can make more efficient decisions and manage short-term UL radio resources better than an RNC, even when the RNC maintains general control over Nodes B. For a Node B to allocate radio resources to the WTRÜ in a Improved uplink (EÜ) operation, Node B must know several WTRD-specific parameters. In accordance with the current 3GPP standard, only the RNC knows the specific parameters of the WTRU. The RNC obtains this information through radio resource control (RRC) messages that carry WTRU-specific information. Therefore, it is necessary to take the information to Node B to properly program the radio resources in EU transmissions.

THE INVENTION The present invention is a method and system for transferring WTRU-specific information to Nodes B to support the UE operation in a wireless communication system. An RNC obtains specific information from WTRU and transfers the specific information from WTRU to the Nodes B. Each Node B is configured to program UL transmissions from a WTRU and uses the WTRU-specific information in the operation of EU transmissions.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a diagram of a wireless communication system. Figure 2 is a block diagram for transferring WTRU-specific information between network entities in accordance with the present invention. Figure 3 is a flow diagram of a method for transferring WTRU specific information in accordance with the present invention.

DETAILED DESCRIPTION OF THE PREFERRED MODALITIES The present invention will be described with reference to the figures, in which like numbers represent like elements. ~ » Hereinafter, the term "WTRU" includes, but is not limited to, a user equipment, a mobile station, a fixed or mobile subscriber unit, a person locator, or any other type of device capable of operating in an environment wireless Hereinafter, the term "Node B" includes, but is not limited to, a base station, a site controller, an access point or any other device type inferred in a wireless environment. Figure 1 is a block diagram of a wireless communication system 100 in which an RNC 106 controls a plurality of Nodes B 104 (of which - only one is shown), and each Node B 104 covers one or more cells 108a , 108b, 108c. Typically there is a "server cell" serving the WTRU 102, but the WTRÜ 102 may be in temporary transfer with several cells at the same time. For example, in the EU operation, the UL transmissions are programmed and the radio resources are allocated by the Node B 104 to the WTRU 102 through a "server" cell, for example the cell 108c, with which the WTRU 102 has established a connection. The WTRÜ 102 may also be connected to other cells as a support for the temporary transfer. Figure 2 is a block diagram of a system 200 for transferring WTRÜ-specific information to support the EU operation in accordance with the present invention. The system 200 includes at least one WTRU 202, at least one Node B 204, and at least one RNC 206. The communication links support the sending of signals 208, 210, 212 between the WTRU 202, the Node B 204 and the RNC 206. Initially, an RNC 206 obtains information WTRU-specific of a WTRU 202 that uses the sending of RRC 208 messages during the initial connection. The information transferred from the WTRÜ 202 required by the Node B 204 is mainly information on the physical transmission and reception capacity. The specific information of WTRU is then carried from the RNC 206 to a Node B 204 to be used in the programming of UL transmissions for the WTRÜ 202. A new signaling procedure can be used to transfer the information from the RNC 206 to the Node. B 204. Alternatively, the existing mechanisms (for example the Radio Link Establishment procedure on the Iur and Iub interfaces) can be modified so that the RNC 206 sends specific WTRU information to the Node B 204. While the protocol or The specific format used to transmit the information is not critical to the present invention, as in the present example, the transfer of the information from the RNC 206 to the Node B 204 is through the interface Iub 210 and the Iur interface. RNC 206 transfers the specific information from WTRU to Node B 204 through the control procedure of the Radio Network Subsystem Application Protocol (RNSAP) (over the Iur interface) and the control protocol of the Application Part of the Node. B (NBAP) (over the Iur interface). This information can be sent together with the Radio Link Establishment procedure in the UTRAN. The sending of WTRU-specific information may occur in response to a discrete event, such as when the WTRU 202 enters or establishes service in the service area covered by the RNC 206, or when the WTRU 202 leaves the service area. Alternatively, the sending of WTRU specific information may occur periodically during the existence of a radio link with which the WTRU 202 updates the specific information of the WTRU. The transfer of the specific information of the WTRU can be initiated by the RNC 206 or the Node B 204. If e-initiated by the RNC 206, the specific information of WTRÜ is transferred at the beginning of the service or upon detection of the specific information change of WTRÜ from RNC 206 to Node B 204. Alternatively, a Node B 204 may require that the information be sent from RNC 206 to Node B 204, and RNC 206 then transfers the information against receipt of the request by the Node. B 204. The specific information of WTRU includes, but is not limited to: WTRU capabilities with respect to EG;; information that affects data speeds and production; .e information related to physical and transport channel characteristics assigned to a WTRU and relevant to a Node B. Information that affects data and production speeds includes, but is not limited to: the number of multiple codes supported by physical UL channels; modulation schemes and coding rates supported by physical channels ÜL !; memory or buffer sizes for automatic repeat request (ARQ) in the WTRÜ; power class WTRÜ; number of hybrid ARQ processes (H-ARQ) supported in the WTRÜ; the form of WTRU memory available for EU; supported bit rates and bits that can be received per transmission time interval (TTI) at layer 1 (Ll) or layer 2 (L2) level; and capacity for the simultaneous reception of channels other than those specific to the EU by the WTRU. Information on physical channel and transport characteristics includes, but is not limited to: maximum or minimum power configurations of UL or DL physical channels; shared or dedicated physical channels assigned by that WTRU (dispersion and mixing codes, periodicity or enumerations of time intervals when the use of allocated shared channel can be assigned to the WTRU); and information about HSDPA WTRU capacity class for DL services. The present invention is applicable to frequency division duplex (FDD) or time division duplex (TDD) modes. Due to the matching of the sending of upper layer signals (RRC or via Iur / Iub) for FDD and TDD modes, all the parameters listed above also apply to the TDD mode. For a TDD application, some TDD parameters should also be included only, such as number of service time slots Eü TDD per WTRU, number of EU TDD dispersion codes per WTRU and per time slot, and allowable power configurations and configurable physical channels of Eü TDD WTRU by time slot and by WTRU '. The WTRU capabilities for High Speed Data Packet Architecture (HSDPA) for data transmissions' DL have several common attributes with the EU WTRU capabilities for UL data transmissions. Since a Node B provides service programming for both DL HSDPA and UL EU, the Node B has the ability to dynamically distribute capabilities between UL and DL services, potentially on a TTI basis, and to determine better UL and DL transmissions for better quality. of service (QoS) and a more efficient use of radio resources. Figure 3 is a flow chart of a process 300 for transferring WTRU-specific information in accordance with the present invention. A WTRU 202 establishes a connection 212 to a Node B 204 in a region covered by an RNC 206 (step 202). The RNC 206 obtains WTRU-specific information from the WTRU 202 using the sending of messages from the RRC (step 204). The RNC 206 transfers the specific information of WTRÜ to the Node B 204 (step 206). The WTRU-specific information transfer can be initiated by the Node B 204. The Node B 204 is configured to program UL transmissions from the WTRU 202, and use the WTRU-specific information in operation of the EÜ transmission. Although the features and elements of the present invention are described in the preferred embodiments 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 or without other features and elements. of the present invention.

Claims (14)

1. CLAIMS 1. Method for transferring specific information from a wireless transmission / reception unit (WTRÜ) to support an improved uplink operation (Eü) in a wireless communication system comprising a radio network controller (RNC), a plurality of Nodes B, and a WTRU where each Node B is configured to program uplink transmissions (ÜL) from the WTRU, the method is characterized in that it comprises: obtaining specific information from WTRÜ by the RNC; and transferring the WTRU-specific information from the RNC to at least one of the Nodes B, whereby at least one of the Nodes B uses the WTRU-specific information in operation of the UE transmission. Method according to claim 1, characterized in that the RNC updates the specific information of WTRU each time the specific information of the WTRÜ changes. Method according to claim 1, characterized in that the WTRU-specific information includes at least one of the capacity of WTRU with respect to Eü, information related to the access capability of the high-speed downlink packet (HSDPA), information that affects data and production speeds and information on physical and transport channel characteristics assigned to 1 WTRÜ and relevant to Node B. 4. Method according to claim 3, characterized in that the information affecting data rates and production includes one of the number of multiple codes supported by UL physical channels, modulation schemes and rates of encoding supported by physical UL channels, memory sizes or buffer for automatic repeat request (ARQ) in a WTRU, power class of WTRÜ, number of hybrid ARQ processes (H-ARQ) supported in the WTRU, any form of memory of WTRU available for EU or HSDPA service, supported bit rates and bits that can be received per transmission time slot (TTI) at layer 1 (Ll) or layer 2 (L2) level; and capacity for the simultaneous reception of channels other than those specific to the EU by the WTRU. Method according to claim 3, characterized in that the information on physical and transport channel characteristics includes at least one of the maximum or minimum power configurations of physical UL or downlink (DL) channels; shared or dedicated physical channels assigned by that WTRÜ; and information about WTRU HSDPA capacity class for DL services. Method according to claim 3, characterized in that the specific information for WTRU includes at least one of the number of service time slots for time division duplex by WTRU, number of dispersion codes EU TDD per WTRÜ and per time slot, and allowable and configurable power configurations of physical channels of TDU EÜ of WTRÜ per time slot and per WTRU. -.i 7. Wireless communication system for transferring specific information of wireless transmission / reception unit (WTRU) to support the improved uplink (EU) operation, system is characterized in that it comprises: a WTRU: a plurality of Nodes B, each Node B being configured so as to program uplink (UL) transmissions of the WTRU based on WTRU specific information; and a radio network controller (RNC) comprising: means for obtaining WTRU-specific information; and means for transferring the WTRU-specific information to Nodes B. 8. System according to claim 7, characterized in that the RNC updates the WTRU-specific information each time the WTRU-specific information changes. System according to claim 7, characterized in that the WTRU-specific information includes at least one WTRU capacity with respect to EU, information related to the high-speed downlink packet access capability (HSDPA), information affecting speeds and data production, and information on physical and transport channel characteristics assigned to the WTRU and relevant to the Node B. 10. System according to claim 9, characterized in that the information that. affects speeds and data production includes at least one of the number of multiple codes supported by physical UL channels, modulation schemes and encoding rates supported by physical UL channels, memory sizes or buffer for automatic replay request (ARQ) of WTRU, power class, number of hybrid ARQ processes (H-ARQ) supported in the WTRU, any form of WTRU memory available for an EU or HSDPA service, bit rates supported and bits that can be received per time interval of transmission (TTI) at the layer 1 (Ll) or layer 2 (L2) level, and capacity for the simultaneous reception of other channels that are not specific to the WTRÜ. 11. System according to claim 9, characterized in that the information on physical characteristics and transport channel includes at least one of the configurations of maximum or minimum power of physical channels ÜL or downlink (DL), shared physical channels or dedicated ones assigned by that WTRÜ, and information on WTRU's HDSPA capacity class for DL services. System according to claim 9, characterized in that the WTRU-specific information further includes at least one of the number of time-division duplex service time slots (TDD) EU, number of TDD-EU dispersion codes per WTRU and per time slot, and allowable and configurable power configurations of physical TDD EU channels of WTRU by time slot and by WTRU. 13. Method for transferring information specific to wireless transmission / reception unit (WTRU) to support high-speed data packet architecture (HSDPA) operations in a wireless communication system comprising a radio network controller (RNC), a plurality of Nodes B and a WTRU; where each Node B is configured to program downlink (DL) transmissions to the WTRU, the method is characterized in that it comprises: obtaining specific information from WTRU by the RNC; and transferring the specific information of the WTRU from the RNC to at least one of the Nodes B, whereby at least one Node B uses the specific information of WTRU in the operation of the Eü transmission. Method according to claim 1, characterized in that the system supports the improved uplink (EU) operation, which further comprises the configuration of the Node B for programming uplink (UL) transmissions from the WTRU, whereby the at least one Node B uses the specific information of WTRU to dynamically program both transmissions (EU) and (HSDPA).