TWI385996B - Method of generating enhanced uplink medium access control protocol data unit, enhanced uplink transport format combination selection and multiplexing unit and integrated circuit - Google Patents

Description

Generate a method for enhancing the data unit of the uplink media access control protocol, and strengthen the uplink transmission format Combination selection and multiplex unit and integrated circuit

The present invention is related to wireless communication systems. More particularly, the present invention relates to an enhanced dedicated channel (E-DCH) control transmission method and apparatus.

The improved uplink (UL) coverage, output and transmission latency methods are currently being investigated in the 3rd Generation Partnership Project (3GPP). In order to achieve these goals, enhanced uplink (EU) transmission has been proposed in the third generation partnership program, where the uplink resource (ie physical channel) control (ie scheduling and dispatching) is from the wireless network controller ( RNC) was moved to Node B.

Figure 1 shows a conventional wireless transmit/receive unit (WTRU) (e.g., mobile station), side media access control (MAC) architecture 100. The WTRU-side media access control architecture 100 includes an enhanced uplink media access control (MAC-es/MAC-e) entity 105 that includes different independent sub-layer entities within the media access control. Media Access Control - es/-e Functional Segmentation is the result of how media access control functionality is partitioned into the Universal Terrestrial Radio Access Network (UTRAN). The WTRU-side media access control architecture 100 further includes a high-speed media access control entity 110, a shared/shared media access control (MAC-c/sh) 115, and a dedicated channel media access control (MAC- d) 120 and a Media Access Control Service Access Point (SAP) 125. The Media Access Control-c/sh 115 can control access to all shared transmission channels except the High Speed Downlink Shared Channel (HS-DSCH) 145. The dedicated channel media access control 120 can control access to all dedicated transmission channels, media access control -c/sh 115 and media access control -hs110. The Media Access Control-hs110 can control access to the High Speed Downlink Shared Channel 145.

The media access control-es/media access control-e entity 105 can control access enhanced dedicated channel 130, whereby media access control-d 120 can access enhanced dedicated channel 130 via connection 135, while media access control SAP 125 The enhanced dedicated channel 130 can be accessed via connection 140.

Figure 2 shows the media access control interaction operation in the conventional WTRU in Figure 1. As shown in FIG. 2, a Radio Link Control (RLC) Protocol Data Unit (PDU) is connected to the Media Access Control-d on a logical channel. In the Media Access Control-e header, the Data Description Indicator (DDI) field (6-bit) identifies the logical channel, media access control-d stream, and media access control-d protocol data unit size. The mapping table is transmitted on the Radio Resource Control (RRC) signal transmission to cause the WTRU to set the data description indicator value. The N field (6-bit fixed size) indicates the number of consecutive media access control-d protocol data units corresponding to the same data description indicator value. The data description indicator field special value indicates that no data is included in the remainder of the Media Access Control-e Agreement data unit. The Transmission Sequence Number (TSN) field (6-bit) provides the transmission sequence number on the enhanced dedicated channel 130 shown in FIG. The media access control-e-protocol data unit is forwarded to a hybrid automatic repeat request (H-ARQ) entity, which then forwards the media access control-e-protocol data unit to layer 1 for use in a transmission time segment (TTI) Transfer.

An effective media access control architecture that enhances the scheduling of dedicated channel data transmissions is expected.

The invention relates to an enhanced dedicated channel control transmission method and device. The Available Transport Format Combinations (TFCs) list is generated on the basis of the Complex Media Access Control-d stream. The Media Access Control-e-Agreement data element is generated using a transport format combination selected from the list of available transport format combinations. The Media Access Control-e Protocol data unit is forwarded to the hybrid automatic repeat request processing unit for transmission. The available transport format combination table list enhances the transport format combination group (TFCS) by remaining the dedicated channel power, and has the highest priority media access control-d stream power offset for enhancing dedicated channel data for transmission, and each The gain factor of the transport format combination is continuously updated and the recovered transport format combination is continuously updated.

Hereinafter, the term "wireless transmitting/receiving unit" includes, but is not limited to, a user equipment (UE), a mobile station, a fixed or mobile subscriber unit, a pager, or any other type of user device operable in a wireless environment. Hereinafter, the term "B Node" is used to include, but is not limited to, a base station, an address controller, an access point, or any other interface device in a wireless environment.

Thereafter, the "Media Access Control -e" noun will be used jointly to refer to Media Access Control - e and Media Access Control - es.

Features of the invention may be incorporated into an integrated circuit (IC) or configured in a circuit comprising multiple interconnected components.

Figure 3 shows a wireless transmit/receive unit media access control-e architecture 300 configured in accordance with the present invention. The WTRU 300 media access control-e architecture 300 includes an enhanced transport format combination selection and multiplex unit 305, a hybrid automatic repeat request processing unit 310 and a lower layer management unit 315.

The enhanced transport format combination selection and multiplex unit 305 can receive a schedule grant signal 320 that indicates the amount of transmit power that can be used by the scheduled media access control-d stream. The amount of transmission power indicated by the scheduling grant signal 320 can be identified as controlling the channel power to the dedicated entity or can be used for the maximum transmission power 330 provided by the layer management unit 315 under the scheduled media access control-d stream 325. ratio.

The WTRU transmits the scheduled media access control-d stream 325 in accordance with the scheduled grant and can also transmit the non-scheduled media access control-d stream 335 at any time to reach the configured bit rate.

The enhanced transport format combination selection and multiplex unit 305 includes a transport format combination recovery and cancellation unit 355, a multiplexer 360 and a transport format combination selection and padding unit 365. Enhanced transport format combination selection and multiplex unit 305 can receive scheduled and non-scheduled media access control-d streams 325, 335 and generate a media access after selecting a transport format combination for media access control-e protocol data unit 348 Control-e agreement data unit 348. The transport format combination recovery and cancellation unit 355 can receive a portion of the remaining enhanced dedicated channel power signal 340 based on the maximum allowed power 330. The multiplexer 360 can receive the rate requirement bit 345 from the rate requesting unit 370, the portion of which is based on the signal 350 output by the hybrid automatic repeat request processing unit 310 indicating the failure of the hybrid automatic repeat request from the serving cell. produce.

The transport format combination recovery and cancellation unit 355 may allow the enhanced transport format combination group subgroup to be enforced. The transport format combination group sub-group is enhanced with the remaining enhanced dedicated channel power 340, and the transport format combination group 342 is enhanced, with the highest priority media access control-d stream power offset (in media access control) for enhancing dedicated channel data for transmission. -d stream power offset based) 344, the gain factor of each transport format combination (inferred from media access control - d stream power offset 344), and enhanced dedicated channel minimum group rate (included in enhanced transport format combination) Group 342) is based on the elimination and recovery transport format combination is continuously updated.

Referring to Figure 4, the transport format combination recovery and cancellation process 400 in accordance with the present invention is explained below. When the dedicated channel setup is enhanced, the parameters related to the transport format combination selection are initialized (step 402). For each media access control-d stream configured with a unique power offset, the required transmission power of each enhanced transmission format combination controls the channel transmission power with the current dedicated entity, and the number of bits in each enhanced transmission format combination and enhanced transmission The gain factor of the format combination is calculated based on the basis. The transport format combination list that is classified by the power requirement is then stored. Each entry in the list identifies the power requirements of the transport format combination with the associated media access control-d stream power offset. Alternatively, a complete list of all media access control-d streams with metrics can be stored. The radio resource controller signaling parameters and other parameters such as the enhanced group channel transmission channel (TrCH) minimum group data rate are also set.

The enhanced transport format combination recovery and cancellation procedure can be initialized for each transmission time segment. When the enhanced transport format combination recovery and cancellation procedure is initiated, the transport format combination recovery and cancellation unit 355 can receive and store the remaining enhanced dedicated channel power 340 (step 404). Based on the buffer occupancy and the logical channel mapped to the enhanced dedicated channel and the media access control-d flow priority, the media access control-d flow system with the highest priority data is determined to be mapped to include non- The zero-buffer-occupied logical channel enhances all media access control-d-streams between the dedicated channels (step 406). The power offset of this media access control-d stream is used in the subsequent steps.

For the power offset of the highest priority media access control-d stream, the transport format combination related table list by power requirement classification is determined (step 408). The transport format combination table column is then indexed with the remaining enhanced dedicated channel power requirements (step 410). If the transmission power required to enhance the transport format combination is greater than the residual power of the enhanced dedicated channel ( P _E-TFC > P _remain ), the enhanced transport format combination is eliminated, and if the enhanced transmission format combination requires the transmission power to be enhanced by the dedicated channel With the remaining power support, the enhanced transport format combination is restored. Preferably, the enhanced transport format combination minimum set is defined such that the enhanced dedicated channel transport format combination within the minimum set is never blocked by the transmission power limit. The transport format combination recovery and cancellation unit 355 can output the transport format combination group subgroup 358 to the multiplexer 360 (step 414).

The multiplexer 360 may concatenate the multimedia access control-d protocol data unit into a media access control-es protocol data unit, and multiplex one or multimedia access control-es protocol data unit into a single medium access control-e Agreement data unit 348. The multiplexer 360 can also manage and set each logical channel transmission sequence number (TSN) for each media access control-es protocol data unit. The multiplexer 360 considers the transmission power indicated by the scheduling grant signal 320 (i.e., the ratio of the control channel power to the dedicated entity) for the enhanced dedicated channel, the rate of the non-scheduled medium access control-d stream permission 352, and the enhanced dedicated channel. The maximum transmission format combination allowed by the remaining power allows the media access control-d stream combination 354, each logical channel relative priority and rate requirement bit header 345 (if the rate requirement is transmitted in this transmission time segment).

5A and 5B together depict a flowchart of a process 500 for multiplexing media access control-d flow to media access control-e protocol data unit 348 in accordance with the present invention. The multiplexer 360 can calculate the maximum support payload that can be transmitted by the WTRU in the upcoming transmission time zone based on the power offset and the remaining power (that is, is included in the supported enhanced transport format combination (transport format combination) Group Subgroup) The maximum media access control-e-protocol data unit size in the table column (step 502). If there is a rate requirement in the upcoming transmission time segment, the rate requirement bit is reserved. The available payload is set. The maximum support payload (step 504). Based on the transmission power indicated by the schedule grant signal 320, the multiplexer 360 can calculate the maximum schedule payload transmitted for the transmission at the selected power offset (step 506). The available schedule payload is set to the maximum schedule payload (step 508). For each media access control-d stream with a non-scheduled license, the available non-scheduled payload is set to a non-scheduled license. Value (step 510).

The following steps are performed for each logical channel in a prioritized order. The highest priority is selected (step 512). Determining whether there is at least one logical channel containing data of the allowed media access control-d stream combination of the selected priority. If not, the process proceeds to step 536 to determine if the selected priority is the lowest priority. If not the lowest priority, the secondary priority is selected (step 538), and process 500 returns to step 514. If the priority is the lowest, the process ends.

If it is determined at step 514 that there is a logical channel containing the data, then any logical channel greater than one (step 516) is arbitrarily selected and further determines if there is a available payload (step 518). If no payload is available, then process 500 ends. If a payload is available, it is further determined that the logical channel belongs to a Media Access Control-d stream with a non-scheduled license or schedule permission (step 520).

If the logical channel belongs to a media access control-d stream with a non-scheduled license, then it is further determined whether there is a non-scheduled payload for the media access control-d flow (step 522). If so, the Media Access Control-e Agreement data unit 348 is populated with the minimum available payload of the logical channel, and the non-scheduled payload and available data are available (step 524). The available payload and available non-scheduled payloads are reduced by the padded data bits and associated header bits (step 526), and process 500 proceeds to step 534.

At step 534, a determination is made as to whether there is another logical channel of this priority that includes data allowing the media access control-d stream combination. If there are no other logical channels, then process 500 proceeds to step 536 to select the secondary priority. If there is a logical channel of the same priority, then process 500 returns to step 516.

The transport format combination selection and padding unit 365 selects the appropriate enhanced transport format combination and applies padding for the media access control-e-protocol data unit 348 to accommodate the selected enhanced transport format combination. The transport format combination selection and padding unit 365 can determine the media access control-e protocol data unit size and select a minimum transport format combination from the transport format combination table list that supports the power offset, which is greater than the media access control after multiplexing. -e agreement data unit size. The transport format combination selection and padding unit 365 then adds padding to the media access control-e-protocol data unit 348 to accommodate the selected transport format combination. Enhanced transport format combination selection and multiplex unit 305 can output media access control-e protocol data unit 376, transport format combination 378, power offset 380, retransmission maximum number 382, rate requirement flag 384 and happy bit 386 to mix The processing unit 310 is automatically repeated.

The hybrid automatic repeat request processing unit 310 is responsible for managing each hybrid automatic repeat request processing. The hybrid automatic repeat request processing unit 310 can synchronously operate the transmission and retransmission. The hybrid automatic repeat request feedback processing is performed on the hybrid automatic repeat request information channel (HICH) (that is, ACK (acknowledgement) / NACK (deny)), and the maximum number of retransmissions per hybrid automatic repeat request processing is tracked. The hybrid automatic repeat request processing unit 310 may output a signal 350 when a hybrid automatic repeat request failure from the serving cell occurs. When the hybrid automatic repeat request processing is available, the hybrid automatic repeat request processing availability flag 388 is transmitted to the enhanced transport format combination selection and multiplex unit 305.

The features and elements of the present invention are described in the preferred embodiments in the preferred embodiments, and the various features and elements are not required to be further Used separately.

105. . . Media access control - es / media access control - e

110. . . Media access control-hs

115. . . Media access control -c/sh

120. . . Dedicated channel media access control -d

125. . . Media access control service access point

130. . . Strengthen dedicated channels

145. . . High speed chain sharing channel

348, 376. . . Media access control-e agreement data unit

342. . . Strengthen the dedicated channel transmission format combination group

E-TFC. . . Enhanced transport format combination

H-ARQ. . . Hybrid automatic repeat request availability metrics

TFC. . . Transport format combination

MAC-d. . . Media access control -d

WTRU. . . Wireless transmission/reception unit

MAC-e. . . Media access control-e

RLC. . . Wireless link control

HARQ PROCESS. . . Hybrid automatic repeat request

TSN. . . Transmission sequence number

DDI. . . Data description indicator

PDU. . . Agreement data unit

RLC PDU. . . Radio link control protocol data unit

The present invention can be understood in more detail from the following description of the preferred embodiments, wherein: FIG. 1 shows a conventional wireless transmission/reception unit side media access control architecture; FIG. 2 shows a conventional wireless transmission/reception of FIG. Prior art media access control interaction operations in the unit; FIG. 3 shows a wireless transmit/receive unit media access control-e architecture configured in accordance with the present invention; and FIG. 4 is a transport format combination recovery and elimination in accordance with the present invention Process Flow Diagram; and Figures 5A and 5B together depict a process flow diagram of a multiplexed media access control-d flow to media access control-e protocol data unit in accordance with the present invention.

348, 376. . . Media access control-e agreement data unit

342. . . Strengthen the dedicated channel transmission format combination group

E-TFC. . . Enhanced transport format combination

H-ARQ. . . Hybrid automatic repeat request availability metrics

TFC. . . Transport format combination

MAC-d. . . Media access control -d

WTRU. . . Wireless transmission/reception unit

MAC-e. . . Media access control-e

Claims (10)

A transport format combination selected from a list of available transport format combinations based on a Complex Dedicated Channel Media Access Control (MAC-d) stream to generate a Enhanced Uplink Media Access Control (MAC-e) protocol data unit (PDU) method, the method comprising: calculating a maximum support payload based on a residual power and a power offset on an enhanced dedicated channel (E-DCH) of the transmitted data; setting an available payload to The maximum support payload; and calculating a maximum scheduled payload transmitted by a selected power offset that can be used for transmission. The method of claim 1, further comprising: setting an available non-scheduled payload to the non-scheduled license value for each dedicated media access control flow having a non-scheduled license; and if At least one logical channel having a material with a combination of dedicated media access control flows and an available payload, determining whether the logical channel belongs to a dedicated media access control flow or scheduling license dedicated media with non-scheduled permissions Take the control flow. The method of claim 2, wherein if the logical channel belongs to a dedicated media access control flow with a non-scheduled license, populating the enhanced uplink media access control protocol data unit to achieve the available access to the logical channel The minimum value of one of the available non-scheduled payloads and available data. The method of claim 3, further comprising: reducing the available payload and the available non-scheduled payload by the filled data bit and the associated header bit. The method of claim 2, wherein if the logical channel belongs to a dedicated media access control flow with scheduling permission, filling the enhanced uplink media storage The control agreement data unit reaches the minimum available payload of the logical channel, the available schedule payload, and the available data. The method of claim 5, further comprising: reducing the available payload and the available schedule payload by the filled data bit and the associated header bit. An Enhanced Uplink Transport Format Combination (E-TFC) selection and multiplex unit comprising: a transport format combination recovery and cancellation unit based on a complex dedicated channel media access control (MAC-d) stream to generate a a list of available transport formats; a multiplexer for generating an enhanced uplink media access control (MAC-e) protocol data unit (PDU); and a transport format combination selection and padding unit for enhancing the uplink The media access control protocol data unit selects a transport format combination and applies the padding enhanced uplink media access control protocol data unit to match the selected enhanced transport format combination. The enhanced uplink transport format combination selection and multiplex unit as described in claim 7 wherein the multiplexer multiplexes the multiple dedicated media access control flow into a single enhanced uplink media access control protocol data unit . For example, the enhanced uplink transmission format combination selection and the multiplex unit described in claim 7 wherein the enhanced uplink media access control protocol data unit considers a scheduling permission, a non- The rate-permission of the scheduled dedicated media access control flow, the maximum transmission format combination allowed by the remaining enhanced dedicated channel power, the combination of dedicated media access control flows, and the relative priority of each logical channel and rate requirement bit header One of them was produced. An integrated circuit (IC) comprising an enhanced uplink transmission format combination selection and a multiplex unit as in claim 7 of the patent application.