TW201029377A - Method and apparatus for efficient operation of an enhanced dedicated channel - Google Patents

Abstract

A method and apparatus for efficient operation of an enhanced dedicated channel (E-DCH) are disclosed. A physical layer processing includes computation of various control parameters followed by actual processing of the data to be transmitted. In accordance with the present invention, the computation of the control parameters is performed asynchronously from the associated data operation. A medium access control (MAC) layer provides information needed for computation of the control parameters to the physical layer as early as possible, while the data is being processed in parallel. The provided data includes a hybrid automatic repeat request (H-ARQ) profile, a transport block size, power offset, or the like. By sending this data to the physical layer before MAC-e processing is complete, the latency constraint can be significantly relaxed.

Description

201029377 . VI. Description of the invention: * [Technical field to which the invention pertains] > ^ The invention relates to a wireless communication system. More particularly, the present invention is a method and apparatus for efficiently operating a dedicated channel (Ε-DCH). [Prior Art] In Release 6 of the 2nd Generation Partnership Project (3GPP), research is conducted to improve the method of upper link (UL) coverage, total processing power, and transmission latency. In order to successfully execute these methods, the scheduling and allocation of the ❿ entity 已 resources has been transferred from the Radio Network Controller (RNC) to the Node B (Node-B), so the Node B can be effectively more effective than the RNC in a short time. Determining and managing the UL radio resource, even if the node is still controlling the node b. Figure 1 is a block diagram illustrating a conventional wireless communication system 100 in accordance with the present invention. A radio transmission/reception system (WTRU) 102, a Node B 104, and an RNC 106 are included. The RNC 106 sets the EU parameters of the Node B 104 and the WTRU 102, such as an initial transmission power level, an allowable maximum EU transmission power. Or a channel ❹ resource available to each Node B to control overall enhanced uplink (EU) operation. Between the WTRU 102 and the Node B 104, a ULEU signal channel 110 and a DL EU signal channel are established. 112. To support EU operations. With respect to E-DCH transmission, the WTRU 102 transmits a rate request to the Node B 1〇4 via the UL EU signal channel 110'. In response, the Node B 104 passes through DLEU signal channel 112, transmitting one Rate agrees to the WTRU 102. After allocating EU radio resources to the WTRU 102, the WTRU 102 transmits E-DCH data via the E-DCH 108. In response to the E-DCH transmission, the node B 1〇4 transmits an acknowledgement (ACK) or a non-acknowledgement notification (NACK) via the DLEU letter 4 201029377. Channel 112. The message is in a hybrid automatic repeat request (HARQ) operation. E-DCH data transmission, the Node B 104 may also agree to respond to the WTRU 102 at the rate. Figure 2 is a block diagram illustrating the protocol architecture of a conventional WTRU 102. The protocol architecture of the WTRU 102 includes A higher layer 202, a radio link control (RLC) layer 204, a media access control (MAC) layer 206, and a physical layer (PHY) 208. The MAC layer 206 includes a dedicated channel MAC (MAC-d) ❹ 201 And an E-DCH MAC (MAC_e/es) 212. The MAC-e/es 212 handles all functions related to an E-DCH transmission and reception, including but not limited to H-ARQ transmission and retransmission, data prioritization Sequence, MAC-d/MAC-es multiplexing and transport format combination (TFC) selection One or more independent UL transmissions are processed on a E-DCH between a WTRU and a Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (UTRAN) during a common time interval. For example, MAC layer H-ARQ or simple MAC layer automatic repeat request (ARQ) operation, in which each transmission requires a different number of destinations to be transmitted for successful reception by the UTRAN. This operation can result in loss of transmission order at the MAC layer. According to the 3GPP standard, the transmission time interval (ττι) of the E-DCH is 10 ms or 2 ms. In order to achieve higher data rates, the E-DCH operation of the WTRU should be carefully designed to accomplish the required time requirements. SUMMARY OF THE INVENTION The present invention is directed to a method and apparatus for efficiently operating an E-DCH. The physical layer processing contains different control parameters (such as a specific erasure pattern), and then actually processes the data to be transmitted. In the conventional system, the operations in the physical layer occur only after the mac processing is completed. 5 201029377 = The present invention, the autocorrelation data operation, the control performed to calculate the information required by the control parameters to; the processing of the h-ar〇_H data is parallel. The data provided contains a processing 譲^ [Embodiment] The layering can be limited and the delay is limited.

Thereafter, the "WTRU"-word contains, but is not secret, a user device for the target station or action, a beer player, or any type of operation that can be operated in a wireless environment. Thereafter, "node" - words include, but are not limited to; a base port location controller, an access point, or any type of interface device in a wireless environment. The present invention provides functional partitioning and interaction between software and hardware entities operating in a WTRU, E-DCH. The present invention is based on any type of wireless communication system including, but not limited to, UMTS Frequency Division Duplex (FDD), Time Division Dual I (TDD), and Time Division Synchronous Code Division Multiple Access (TD_SCDMA) systems. Features of the present invention may be incorporated into an integrated circuit (! or constructed in a circuit) that includes a plurality of interconnected elements. According to the present invention, a WTRU 102 may include a protocol data unit (pDU) processor. 310 (i.e., the contract engine) is used to process data. Figure 3 is a block diagram illustrating the WTRU 102 in accordance with the present invention, including the PDU processor 310. The WTRU 102 includes a stack processor 302 An L1 processor 304, a stack memory 306, an L1 memory 308, and a PDU processor 310. The L1 processor 304 mainly performs physical layer software (main control processing and potential signal processing). The L1 processor 304 can also compute certain MAC tasks, such as H-ARQ control, for high-speed downlink packet access (HSDPA) or high-speed uplink packet processing (H SUPA), and a 6 201029377 RLC task. The stacking processor 302 is mainly to calculate the remaining protocol packet operations. The stacking processor 302 can also function as an application processor. The stacking processor 3〇2 and the L1 processor 3〇4 each have Memory For the stacked memory 3〇6 and L1 memory). In the practice of the implementation, many cycles are wasted when the data mine passes the stack (for example, the PDU's new age, the header, the password, etc. The data is repackaged. The operation of the PDU processor 310 is parallel to the stacking processor 3〇2 and the L1 processor 304. The PDU processor 310 is a programmable entity, mainly used in L1. The memory 308 moves data between the stacked memory 3 and 6. When the PDU processor 310 moves data, it also performs data packet fragmentation/de-fragmentation, assembly/decomposition, and translation into encryption/decryption. PDu may also establish and interrupt the RLC and MAC PDU headers. The PDU processor 310 has a specific description for processing incoming and outgoing bitstreams. The description reduces interpretation of the bitfield domain, This generates a header or constructs a sequence of bit fields in the process of generating the title. The pDU 处理器 processor directly establishes MAC-e/es PDUs by a set of PDU descriptors. The PDU description symbol is one. Set of shared data structures RLC PDUs and MAC-e/es PDUs (ie, the contents of data and PDU headers)' and are in a software-friendly format (eg, bit/character-accessible data for fast processing and no bit offset) When sharing memory at a physical level (ie

When the MAC-e/es PDU is stored in the L1 memory 308), the PDU processor 310 establishes the MAC-e/es PDU for transmission based on the TOU description symbol. The advantage of this solution is that it significantly reduces the parallel processing of L2/3 processing and protocol stacking operations. Frame asynchronous operation is not hindered due to frame synchronization PDU 7 201029377 architecture processing and L2/3 processing is offloaded to the ugly processor. It should be noted that the third figure provided is possible. For example, the 祛 〇 , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ==Yue Qing frequency / (four) tillage, ❹

Layer processing includes, but is not limited to, encoding, rate matching, and data retransmission. The physical layer processing includes a meter #不控控数 (e.g., a puncturing Pattem), which is an actual process (4). In the conventional technique, only when it is finished reading MAC_e, Ke happens (four). First, according to the invention, the self-phase_data operation performs the control parameter non-synchronously. The repair is performed first, even if the data is still in the rainbow layer 204. This allows the delay in obtaining the data to be greatly relieved and allows for additional delay slots in the process. When the series is processed in parallel, the layer 206 provides the calculation of the parameter (4) (4) to the physical layer as early as possible. It should be noted that such capabilities are not dependent on the ship processor 310 being used. Figure 4 is a signal diagram illustrating a procedure executed in the WTRU 1G2 for efficiently operating the E-DCH in accordance with the first embodiment of the present invention. According to the first embodiment, the e_dch operation is performed by the PDU processor 2M. The MAC layer processing is induced by the interrupt message (or basic type) transmitted by the physical layer write (step 402). For a program that can be used for transmission, 8 201029377 'at each transmission time interval Cm' or each E_DCH ΤΤΙ, the MAC layer processing is induced to receive each of the new arrangements. The physical layer 2〇8 generates the interrupt message when the H-ARQ procedure is available for the upcoming TTI. When the physical layer 208 receives an ACK of a previous H-ARQ transmission via the H-ARQ procedure, releases the H-ARQ procedure when the maximum number of retransmissions of the H-ARQ procedure has been reached, or when the previous When the H-ARQ program is not used in the TTI, a specific acquisition is determined. The entity layer 208 may also generate the interrupt message when the WTRU 102 receives an updated scheduling consent information from the Node B 104. The interrupt message may be a TTU-based timing interrupt (ci〇ck. The interrupt message includes several information elements, including but not limited to 1), if the first or second enhanced uplink wireless network is temporarily Identification is the exclusive absolute consent; 2) the relative consent from the service and non-serving cells; 3) the previously transmitted H-ARQ indicator (m); 4) the current-specific entity control channel (DPCCH) power, or Yes 5) Time interrupt (ci〇ck interrupt) The physical layer 208 causes the MAC layer 206 to perform several tasks. The MAC layer 206 performs the consent processing according to the updated scheduling information, including an absolute consent and a relative consent to obtain the scheduling consent and the corresponding remaining transmission power for the E-DCH transmission (step 404). The MAC layer 206 also obtains buffer occupancy (step 406). The buffered session is available to the PDU processor 214' using a functional call. As shown in steps 406 and 408, the PDU processor 214 and the MAC layer 206 share a memory with each other. At this point, any RLC non-synchronized tasks (such as timer processing, control pDU processing, etc.) are blocked to keep the buffers consistent. The MAC layer 206 performs a Transport Format Combination (TFC) reply and exclusion procedure to determine E_DCHTFc, which is 9 201029377 • Allowed by the remaining transmit power of the E_DCH (step 410). The MAC layer 206 - may also generate a rate requirement to request a resource from the Node B 104 (step 412). The MAC layer 206 can also perform a multiplexing procedure to multiplex multiple MAC-d PDUs to MAC-es PDUs and multiplex one or more MAC-es PDUs to a single ancestor. PDU (step 414) The above description of the MAC layer tasks of steps 404-414 may also be performed in a different order, or simultaneously, and not all tasks are necessary. The MAC layer 206 then transmits a message to the entity layer 208, such that the entity layer 208 calculates control parameters, and the data is processed by other entities, such as the MAC layer 206, the PDU processor 214. Or the RLC layer (step 416). The message includes an H-ARQ profile, a transport block (TB) size, a power offset, and the like. The H-ARQ profile refers to the power offset characteristics of the H-ARQ procedure and the maximum number of retransmissions. The delay can be greatly relieved by transmitting this message to the physical layer 208' before MAC_e is completed. The processing delay to step 416 is a MAC layer program delay and should be less than a certain delay limit (e.g., 1.7 ms). The MAC layer 206 then transmits a message (or a basic type) (i.e., a UMAC status indicator and a MAC_e/es descriptor) to request the pmj processor 214 to establish a MAC-e PDU (step 418). The message (or basic type) contains the number and size of RLC PDUs required for each logical channel and the MAC-e/es description symbols defining the multiplexed MAC-e/es PDU. After receiving the message (or basic type), from the MAC layer 2〇6, the PDU processor 214 thus updates the buffer occupancy (step 42). At this time, the obstacles of the RLC asynchronous task (such as timer processing, control of pDu processing, etc.) are removed. The PDU processor 214 then moves the data to the physical layer 2〇8 201029377 • or when a data is moved from the stacked memory 306 to the L1 memory 308 - 'establish a MAC-e PDU (step 422). Based on the number and size of PDUs required by the MAC layer 206, the PDU processor 214 establishes an RLC PDU that contains the RLC header. The PDU processor 214 also establishes a MAC_e header with a MAC-es header, a corresponding MAC-es PDU, and a MAC-e PDU based on the MAC-e/es description symbol. The PDU processor 214 also sets the RLC PDU specific timer and state variables. The PDU processor 214 can transmit a completion confirmation message (or basic type) to the physical layer 208 (step 424). Alternatively, the physical layer 208 can be absolutely known by receiving the MAC_e PDU. The PDU processor 214 then transmits a data transfer indication message (or basic type) to the RLC layer 204 (step 426). If blocked during the data conversion process, the RLC layer 204 can process the state variables, timers, etc. after receiving the transmission indication message (step 428). The RLC layer 204 is then occupied by the update buffer (step 430). The delay between the UMAC status indicator and the MAC-e PDU generation in step 424 at step 418 is the rlc layer and PDU processor delay. The sum of the processing delays of the Rainbow 0 layer and the PDU processor and the MAC processing delay should be limited to a reasonable delay limit (eg, 2 37 _. To avoid parallel processing, the maximum delay limit can be reduced to less than 2 ms. Otherwise, parallel processing may be allowed. Figure 5 is a signal diagram illustrating a procedure 500 performed in the WTRU 102 for efficient operation of the E-DCH in accordance with a second embodiment of the present invention. According to the first embodiment The implementation of the present invention does not require a PDU processor. The MAC layer 206 preferably computes at least each UI, and an H-ARQ can be used to transmit and/or receive new scheduling consent information for each TTI. Or the MAC layer 206 can be operated at each E_DCH π. The MAC layer processing is induced by an interrupt 201029377, message (or basic type), and the interrupt message is transmitted by the physical layer 208 (step 502). From the physical layer The interrupt of 〇8 may be based on one or more of the events listed in the embodiment. The physical layer 208 causes the MAC layer 206 to perform a number of tasks. The MAC layer 206 agrees according to the updated arrangement to Make a consent Containing absolute consent and relative consent to obtain the current arrangement agreement and corresponding transmission power to the E-DCH transmission (step 504). The MAC layer 206 calls to the RLC layer 204' by the transfer function to obtain buffer occupancy. Information (steps 5-6). The layer 204 calculates the buffer occupancy and returns it to the mac layer 206 (step 508). The MAC layer 206 performs a TFC reply and exclusion procedure to determine the E-DCH. The TFC 'is allowed by the E-DCH residual transmission power (step 510). The MAC layer 206 may also generate a rate requirement to request resources from the Node B 104 (step 512). The MAC layer 206 performs A multiplex procedure 'for multiplexing multiple MAC-d PDUs into a MAC-es PDU and multiplexing one or more MAC-es PDUs to a single MAC_e PDU (step 514). The above description of the MAC layer task in -514 may be performed in different orders or simultaneously, and not all tasks are necessary. The MAC layer 206 then transmits a message to the physical layer 208, the message containing H - ARQ profile, TB size, power offset, etc. (step 516). The delay can be greatly relieved by transmitting this message to the physical layer 208 prior to MAC-e processing. The processing delay to step 516 is part of the overall MAC processing 'referred to as "MAC processing delay portion 1" and should be less than A delay limit (e.g., 1·7 ms). The MAC layer 206 requests data from the RLC layer 204 by transmitting a umAC status indicator (step 518). Referring to the u^c state 12 201029377

The indicator notifies the size of the RLC PDU required by the RLC layer 204. After the MAC layer 206 receives the UMAC status indicator, the RLC layer 204 processes state variables, timers, etc. (step 520). Based on the number and size of PDUs required by the MAC layer 206, the RLC layer 204 establishes an RLC PDU that contains the RLC header (step 522). The RLC layer 204 then occupies the update buffer (step 524).

The RLC layer 204 then transmits the RLC PDU to the MAC layer 206 (step 526). The delay between the message in step 516 and the ❹ message in step 526 is the RLC processing delay. After receiving the RLC PDU, the MAC layer 206 establishes a MAC-es header and a MAC-e header, and establishes a corresponding MAC-es PDU and MAC-e PDU (step 528). The MAC layer then transmits the MAC-e PDU to the physical layer 208 (step 530). The delay between step 526 and step 530 is part of the overall mac processing delay, referred to as "MAC Processing Delay Part 2". The sum of the RLC processing delay and the MAC processing delay should be limited to a reasonable delay limit (e.g., 2.37 ms). To avoid parallel processing, the maximum delay ❹ limit is reduced to less than 2ms. Otherwise, a parallel process can be allowed. Although the features and elements of the present invention are described in the preferred embodiments in a particular combination, the various features or elements may be used separately without the other features and elements of the preferred embodiments, or with the present invention. The tire features are differently combined with the components or are not combined differently with other features and components of the invention. BRIEF DESCRIPTION OF THE DRAWINGS ^ σ FIG. 1 is a block diagram of a conventional wireless communication system constructed in accordance with the present invention. Fig. 2 is a block diagram showing the structure of the conventional agreement of wtru 13 201029377 used in the present invention. 'Figure 3 is - aspect' (10), _ this (four) _ 1 Li, which contains HX; processor. Fig. 4 is a signal diagram, which is a first embodiment of the present invention, illustrating a procedure for efficiently operating the E-DCH. Fig. 5 is a signal diagram showing a procedure for operating the E-DCH in accordance with the second embodiment of the present invention. [Main component symbol description] Art 〇2, WTRU wireless transmission/reception system 108 enhanced dedicated channel UL uplink EU enhanced uplink 106 wireless network controller 204 wireless connection control layer 206 media access control layer 2 〇 8 physical layer参210 dedicated channel media access control 212 enhanced dedicated channel media access control PDU agreement data unit TFC transport wheel format combination

Claims (1)

201029377 VII. Patent Application Range: 1. A method for processing a data of an enhanced dedicated channel (E-DCH) in a WTRU, comprising: a media access control (MAC) layer Receiving an interrupt message; and processing the interrupt message by the MAC layer, including at least one of: performing consent processing when agreeing to include in the interrupt message; acquiring buffer occupancy information; performing transport format combination ( TFC) reply and exclude; generate a rate requirement; or Multiple protocol data units (PDUs) are multiplexed to a single MAC-e PDU. 2. The method of claim 1, wherein the interrupt message comprises at least one of the following: the interrupt message is received by a first or second enhanced uplink wireless network temporary identification (E-RNTI). An absolute consent with an indication; a relative agreement from the serving and non-serving cells; a hybrid automatic repeat request (H-ARQ) indicator previously transmitted; or a current-specific entity control channel (DPCCH) Power level. 3. If the patent application scope is the first method, the consent processing includes the corresponding transmission power of the Anhu Yi and Lin E_DCH transmission wheels that obtain a current. 4. If you apply for the method of Special Weaving® Item 3, the towel will be added to the special decision E-DCHTK:, the end of the bribe TFC u help (3) transmission __ 功率 power allowed. The buffer occupancy information comprises: 5. The method of claim 1, wherein obtaining the transmission request is calculated to occupy the buffer; and receiving the response to the request. The response includes the buffered occupancy. 15 201029377 6. The method of claim 5, wherein the request is transmitted to a PDU or a wireless link control layer. 7. The method of claim 1, wherein generating the rate requirement comprises requesting a resource from a Node B. 8. The method of claim 1, wherein multiplexing the plurality of PDUs comprises: multiplexing the plurality of MAC-d PDUs to the MAC-e PDU; and multiplexing the one or more MAC-e PDUs to the single MAC -e PDU. A 9' wireless transmission/reception unit (WTRU) for processing a data of an enhanced dedicated channel (E-DCH), the WTRU comprising: a medium access control (MAC) layer, configured to: receive an interrupt message The processing of the interrupt message includes at least one of the following: consent processing when a consent is included in the interrupt message; ~ obtaining buffer occupancy information; performing transport format combination (TFC) reply and exclusion; 产生 generating - Rate requirement; or multiplexing a multiple agreement data unit (PDU) to a single MAC_e PDU 〇10. The WTRU as claimed in claim 9 wherein the interrupt message includes at least one of the following: Level- or secondary-enhanced upper-link non-road temporary identification (E-RNTI) is received with an absolute consent of indication; a relative consent from service and non-serving cells; a hybrid of previous transmissions Automatic retransmission request indicator; or 201029377 A current dedicated entity control channel (DPCCH) power level. m of the WTRU of the ninth patent range, wherein the WTRU. The layer is further configured to take the = power a female platoon to agree with a corresponding residual transmission power for transmission and as part of the consent. ^ WTRU as claimed in the nth item of the patent scope, wherein the layer is further configured to determine the E-DCH TFC as part of the TFC reply and exclusion, the secret transmission power transmitted by the E-DCH. allow. The WTRU as claimed in claim 9 wherein the ancestor layer is further configured to: transmit a request to calculate buffer occupancy; and f, the shame reduction of the accounting occupies 'the i3-th WTRU' where the layer is more The configuration is provided with a PDU processor or a wireless link control layer. - r Λ "The WTRU of the ninth scope" where the tender tier 0 is more configured to request from the 16 - Lion as part of the money production rate requirement. Lu, 凊 patent scope 9th WTRU, its towel MAC The layer is more self-contained: multiplex multiplexed MAC-d PDUs to pDU; and multiplex 2 = uC:: multiplex to single-xia-ePD is called 17