CN101646206B

CN101646206B - Selection method for strengthening dedicated channel transport format set and device thereof

Info

Publication number: CN101646206B
Application number: CN2009101672895A
Authority: CN
Inventors: 高翔
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2009-09-02
Filing date: 2009-09-02
Publication date: 2012-01-25
Anticipated expiration: 2029-09-02
Also published as: WO2011026331A1; CN101646206A

Abstract

The invention discloses a selection method for strengthening dedicated channel transport format set and a device thereof. The method comprises: calculating the code rate of each E-TFC by user equipment, which corresponds to each modulation mode, according to an authorization control message distributed by a network side; according to the code rate of each E-TFC, which corresponds to each modulation mode, and the wireless resource configuration message distributed by the network side, determining a candidate E-TFC set corresponding to each modulation mode; according to the authorization control message and the wireless resource configuration message, determining the code rate corresponding to the maximum authorization transmission power which corresponds to each modulation mode and is allowed on an E-PUCH information channel; according to the code rate corresponding to the maximum authorization transmission power, determining the subset of the candidate E-TFC as the E-TFC set corresponding to each modulation mode; selecting an E-TFC set used for transmitting data from the E-TFC set corresponding to each modulation mode, and adopting a modulation mode corresponding to the selected E-TFC set to package data. On the basis of fully considering the resources distributed by the network side, the method can quickly and reasonably determine a suitable E-TFC set to transmit data.

Description

Method and device for selecting enhanced dedicated channel transmission format set

Technical Field

The present invention relates to the field of mobile communication, and in particular, to a method and apparatus for selecting an enhanced dedicated channel transport Format set (E-TFC) for High Speed Uplink Packet Access (HSUPA).

Background

The high speed uplink packet access HSUPA is the further enhancement and evolution of the TD-SCDMA system in the wireless part, and can greatly improve the uplink capacity and the transmission rate.

HSUPA has two ways of data transmission: scheduled Transmission (Scheduled Transmission) based on a base station (NodeB) and Non-Scheduled Transmission (Non-Scheduled Transmission) based on a Radio Network Controller (RNC). In the existing HSUPA technology, a Media Access Control (MAC) layer provides a Logical Channel (LC) for a Radio Link Control (RLC), and is used for carrying data of the RLC layer; and the physical layer provides a Transport Channel (TrCH) for the MAC layer to carry data of the MAC layer.

In order to support the HSUPA function, two new transmission channels are introduced into the TD-SCDMA system: an Enhanced Uplink dedicated Channel (E-DCH) and an Enhanced Uplink Control Channel (E-UCCH). The E-DCH is used for bearing the uplink service data of the special user; the E-UCCH is used for bearing uplink dedicated control signaling.

The E-UCCH and the E-DCH are mapped to the same enhanced Uplink physical Channel, E-PUCH (E-DCHPhorizontal Uplink Channel). I.e., the dedicated user data channel E-DCH and the control channel E-UCCH associated therewith multiplex the E-PUCH channel. In each Transmission Time Interval (TTI) of the E-DCH, one or more E-UCCHs are used to carry control information associated with uplink E-DCH traffic data. And correspondingly, in one transmission time interval (time slot) for transmitting the E-PUCH data, one user equipment UE transmits the data through at most one E-PUCH.

Meanwhile, according to the configuration conditions such as the number of the E-UCCHs, the number of the time slots occupied by the E-PUCH and the like, the E-UCCH and TPC commands can be contained in one E-PUCH burst or not contained. If the E-UCCH is included in the E-PUCH burst, the TPC command is also transmitted together.

In the above existing HSUPA technology, the UE implements access to the E-DCH, and the process of performing data transmission includes:

(1) and the UE initiates an E-DCH access request through an E-RUCCH channel.

The access request carries uplink control signaling and scheduling information related to the access of the E-DCH.

And after the UE successfully accesses the E-DCH, the information is not sent through the E-RUCCH channel until the HSUPA service is finished.

(2) After receiving an access request sent by the UE, the base station allocates physical channel resources for the UE, including allocating a plurality of resources such as power, code channels, time slots and the like. And informing the UE of the physical channel resource allocation information through an E-AGCH channel.

HSUPA uses E-AGCH channel as down physical channel to load physical channel resource distribution information, specifically absolute authorization control information of up E-DCH; the method is used for realizing rapid scheduling based on NodeB, and simultaneously carrying a Transmitter Power Control (TPC) instruction and a Synchronization Shift (SS) instruction for scheduling E-PUCH.

(3) And the UE receives the physical resource allocation information returned by the base station.

And the UE receives and reads the physical resource allocation information returned by the base station from the E-AGCH channel. And the UE receives the physical resource allocation information through the physical layer and transfers the physical resource allocation information to the MAC layer.

(4) The UE transmits data using the allocated physical resources.

That is, the UE transmits data information through the E-DCH channel and transmits corresponding control information through the E-UCCH.

At this time, the UE needs to perform E-TFC selection (specifically, MAC implementation) first, determine a size of a suitable MAC-E (MAC enhanced) Protocol Data Unit (PDU), and send Data through the E-DCH channel after Data allocation and Data assembly.

(5) And after receiving the data sent by the UE, the base station returns ACK/NACK information to the UE according to the result of data check.

The base station receives data transmitted by the UE through an E-DCH channel and related control information transmitted through the E-UCCH channel, and then performs Cyclic Redundancy Check (CRC) check on the received data. And transmitting corresponding acknowledgement/negative acknowledgement (ACK/NACK) information to the UE on a corresponding E-HICH channel according to the check result.

And sending ACK information when the check is passed, otherwise, sending NACK information.

(6) And the UE determines to send new data or retransmit the sent data according to the received ACK/NACK information.

And updating the control information in the E-UCCH channel according to the ACK/NACK information carried in the E-UCCH channel to decide whether to send new data or retransmit the data. Specifically, when receiving the ACK, new data is sent; when a NACK is received, the data needs to be retransmitted.

Wherein, after receiving the allocated physical resource information, the UE performs the E-TFC selection process in step (4), and no specific selection implementation method is provided in the existing protocol. And selecting an appropriate E-TFC for data transmission is important for data transmission between the UE and the base station, and if the base station and the UE cannot determine an appropriate E-TFC, decoding of the transmitted data may fail, or even the system may not work properly.

For the non-scheduled transmission mode, the only difference from the scheduled transmission mode is the entity providing the UE with the absolute grant control information. In the UE, the radio resource management layer decodes the configuration of the network side, and provides the decoded configuration to the MAC layer, so that the MAC layer performs E-TFC selection, which also has the above-mentioned problem.

Disclosure of Invention

The embodiment of the invention provides a method and a device for selecting an enhanced dedicated channel transmission format set, which can quickly and effectively determine a proper enhanced dedicated channel transmission format set.

A method for enhanced dedicated channel transport format set selection, comprising:

the user equipment calculates the code rate of each E-TFC corresponding to each modulation mode according to the authorization control information distributed by the network side;

determining a candidate E-TFC set corresponding to each modulation mode according to the code rate of the E-TFC corresponding to each modulation mode and the wireless resource configuration information distributed by the network side;

the user equipment determines code rates corresponding to maximum authorized transmitting power which is allowed on an E-PUCH channel and corresponds to each modulation mode according to the authorized control information and the wireless resource configuration information;

determining the subset of the candidate E-TFC set as an E-TFC set corresponding to each modulation mode according to the code rate corresponding to the maximum authorized transmitting power;

and selecting one E-TFC set for data transmission from the E-TFC sets corresponding to the modulation modes.

An enhanced dedicated channel transport format set selection apparatus comprising:

the first code rate calculation module is used for calculating the code rate of each E-TFC corresponding to each modulation mode according to the authorization control information distributed by the network side;

a first determining module, configured to determine a candidate E-TFC set corresponding to each modulation mode according to the code rate of the E-TFC corresponding to each modulation mode and radio resource configuration information allocated by a network side;

a second code rate calculation module, configured to determine, according to the authorization control information and the radio resource configuration information, a code rate corresponding to a maximum authorized transmit power corresponding to each modulation mode that is allowed on the E-PUCH channel;

a second determining module, configured to determine, according to the code rate corresponding to the maximum authorized transmit power, that the subset of the candidate E-TFC set is an E-TFC set corresponding to each modulation mode;

and the selection encapsulation module is used for selecting one E-TFC set for data transmission from the E-TFC sets corresponding to the modulation modes.

The method and the device for selecting the enhanced dedicated channel transport format set provided by the embodiment of the invention calculate the code rate of each E-TFC corresponding to each modulation mode according to the authorization control information distributed by a network side through user equipment; determining a candidate E-TFC set corresponding to each modulation mode according to the code rate of the E-TFC corresponding to each modulation mode and the wireless resource configuration information distributed by the network side; determining a code rate corresponding to the maximum authorized transmitting power corresponding to each modulation mode allowed on an E-PUCH channel according to the authorized control information and the wireless resource configuration information, and determining a subset of the candidate E-TFC set as the E-TFC set corresponding to each modulation mode according to the code rate corresponding to the maximum authorized transmitting power; and selecting one E-TFC set for data transmission from the E-TFC sets corresponding to the modulation modes, and encapsulating the data by adopting the modulation mode corresponding to the selected E-TFC set. The method fully considers the resources allocated by the network side, not only considers the authorization control information allocated by the base station, but also further considers the wireless link configuration information configured by the RNC, so that the transmission format set selected by the user equipment is more reasonable and effective. And the method can quickly and reasonably determine the proper E-TFC set matched with the selected modulation mode for data transmission.

Drawings

FIG. 1 is a flow chart of a method for enhanced dedicated channel transport format set selection in an embodiment of the present invention;

fig. 2 is a flowchart of an implementation of an E-TFC selection method in an embodiment of the present invention;

FIG. 3 is a flowchart illustrating an implementation of determining a code rate corresponding to a maximum authorized power according to an embodiment of the present invention;

fig. 4 is a flowchart illustrating an implementation of determining a logical channel for data to be transmitted according to an embodiment of the present invention;

FIG. 5 is a block diagram of an enhanced dedicated channel transport format set selection apparatus according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a specific structure of an E-TFC selection apparatus according to an embodiment of the present invention.

Detailed Description

The method for selecting the enhanced dedicated channel transport format set provided by the embodiment of the invention is used for selecting the E-TFC after the UE receives the authorization control information distributed by the network side. To achieve data distribution and post-assembly transmission. The method is applicable to both the E-TFC selection process of the non-scheduling transmission mode and the E-TFC selection under the scheduling transmission mode. The only difference is that the E-TFC selection requires a different source of the grant control information to be used.

The method for selecting the enhanced dedicated channel transport format set provided by the embodiment of the invention has a flow chart as shown in fig. 1, and comprises the following steps:

step S1: and the user equipment calculates the code rate of each E-TFC corresponding to each modulation mode according to the authorization control information distributed by the network side.

Firstly, the total number of bits carried by the E-PUCH channel under each modulation mode is determined according to the authorization control information.

And then, respectively calculating the quotient of the size of the transmission block corresponding to each E-TFC and the total number of bits under each modulation mode to obtain the code rate of each E-TFC corresponding to each modulation mode.

Step S2: and determining a candidate E-TFC set corresponding to each modulation mode according to the code rate corresponding to each modulation mode of each E-TFC and the wireless resource configuration information distributed by the network side.

Specifically, the maximum code rate lambda contained in the radio resource configuration information_maxAnd a minimum code rate λ_minDetermining the code rate corresponding to each calculated E-TFC and each modulation modeThe maximum code rate λ_maxAnd a minimum code rate λ_minAnd obtaining a candidate E-TFC set corresponding to each modulation mode according to the code rate.

Step S3: and the user equipment determines the code rate corresponding to the maximum authorized transmitting power which is allowed on the E-PUCH channel and corresponds to each modulation mode according to the authorized control information and the wireless resource configuration information.

For each modulation mode:

and determining a gain factor corresponding to the maximum authorized transmitting power according to the spreading factor of each modulation mode contained in the code channel resource related information and the absolute authorized value contained in the authorization control information.

Then determining a mapping relation between the gain factor and the code rate according to the wireless resource configuration information; and determining the code rate corresponding to the maximum authorized transmitting power according to the mapping relation.

Step S4: and determining the subset of the candidate E-TFC set as the E-TFC set corresponding to each modulation mode according to the determined code rate corresponding to the maximum authorized transmitting power corresponding to each modulation mode. The method specifically comprises the following steps:

and comparing the code rate corresponding to each E-TFC in the candidate E-TFC set corresponding to each modulation mode with the code rate corresponding to the maximum authorized transmitting power.

And forming the E-TFC set corresponding to each modulation mode by the E-TFCs with the code rates smaller than the code rate corresponding to the corresponding maximum authorized transmitting power in the candidate E-TFC set.

Step S5: and selecting one E-TFC set for data transmission from the E-TFC sets corresponding to the modulation modes. The method specifically comprises the following steps:

and aiming at all E-TFCs contained in the E-TFC set corresponding to each modulation mode, and according to the size of a transmission block corresponding to each E-TFC.

And determining the E-TFC set where the E-TFC corresponding to the maximum transport block is located.

Then, the E-TFC set in which the E-TFC corresponding to the largest transport block is located is selected for data transmission.

Step S6: and encapsulating the data by adopting the modulation mode corresponding to the selected E-TFC set.

A detailed implementation flow of the method for selecting an enhanced dedicated channel transport format set according to an embodiment of the present invention is described in detail below with reference to a specific embodiment. As shown in fig. 2, the method comprises the following steps:

step S10: and the UE acquires the authorization control information and the wireless resource configuration information distributed by the network side.

The manner in which the UE acquires the grant control information (or physical channel resource allocation information, to be said) is different between the scheduled transmission manner and the non-scheduled transmission manner.

For scheduled transmission mode, the grant control information is also referred to as absolute grant control information. And the UE receives the absolute authorization control information sent by the base station. The method specifically comprises the following steps: and receiving the absolute authorization control information sent by the network side (base station) from the E-AGCH (E-DCH absolute authorization channel).

The physical layer receives the absolute grant control information transmitted on the E-AGCH and sends the absolute grant value, code channel resource related information, time slot resource related information, E-UCCH number indication (ENI) and other related information which are needed to be used by the E-TFC selection to the media access control layer.

For the non-scheduling mode, the UE receives corresponding authorization control information from the RNC. The method specifically comprises the following steps: the radio resource management layer receives the authorization control information distributed by RNC at the network side for UE, and transfers the absolute authorization value, code channel resource related information, time slot resource related information, E-UCCH number indication (ENI) and other related information which are needed to be used by E-TFC selection to the media access control layer.

Wherein, the following information included in the authorization control information is specifically:

1) absolute authorized power value: and indicating the base station to allow the maximum transmission power of each user equipment of the E-PUCH channel, wherein the value range of the power value is 0dB to 31dB, and the minimum interval is 1dB, specifically referring to Table 26 in section 4.10.1.1 in 3GPP TS 25.222. If the base station allocates a plurality of time slots in one subframe for the E-PUCH channel, each time slot adopts the same absolute grant power value.

2) Code Resource Related Information (CRRI): and indicating the spreading factor and the channelized code allocated by the base station for the E-PUCH. In order to reduce complexity, the same channelization code is used for each time slot in multi-slot transmission.

3) Timeslot Resource Related Information (TRRI): and indicating the time slot resources allocated by the base station for the E-PUCH, and respectively representing the occupation conditions of the TS 1-TS 5 by using 5 bits.

4) And E-UCCH Number indication (ENI).

When obtaining the authorization control information, the mac layer also obtains radio resource configuration information obtained by the radio resource management layer from the network side, for example: maximum allowed code rate, minimum allowed code rate, mapping between code rates and power gain factors under different modulation modes, and the like.

Step S11: and determining the code rate of each selectable E-TFC corresponding to each modulation mode by the authorization control information received by the user equipment UE.

An E-TFC list is pre-configured in the user equipment UE. When receiving the authorization control information of the network side and needing to perform E-TFC selection, respectively calculating the code rate of each E-TFC corresponding to each modulation mode according to the received authorization control information, specifically comprising:

determining the total number of bits carried by the E-PUCH channel according to the authorization control information; and then, respectively calculating the quotient of the size of the transmission block corresponding to each E-TFC and the total number of the bits to obtain the code rate of each E-TFC. That is to say: the code rate can be calculated by the following formula:

wherein S is_eThe size of the transmission block corresponding to the calculated E-TFC;

R_ethe total number of bits carried by the E-PUCH channel.

Wherein, the total number of bits R carried by the E-PUCH channel_eThe authorization control information can be obtained by calculation according to the code Channel Resource Related Information (CRRI), the time slot resource related information (TRRI), the E-UCCH number indication (ENI) and other related parameter information contained in the received authorization control information.

According to code Channel Resource Related Information (CRRI) and time slot resource related information (TRRI) contained in the authorization control information, the total number of bits carried in E-DCH signaling can be calculated, and the bit number occupied by the in-band control signaling is subtracted by the total number of bits to obtain R_eThe value of (c). Wherein, the bit number occupied by the in-band control signaling comprises: E-UCCH number indication, number of bits occupied by TPC command, etc. Then R is_eCan be calculated by the following formula:

<math> <mrow> <msub> <mi>R</mi> <mi>e</mi> </msub> <mo>=</mo> <mfrac> <mrow> <mo>(</mo> <msub> <mi>A</mi> <mn>1</mn> </msub> <mo>×</mo> <mi>TS</mi> <mo>_</mo> <mi>Number</mi> <mo>)</mo> </mrow> <mi>SF</mi> </mfrac> <mo>-</mo> <mrow> <mo>(</mo> <mi>ENI</mi> <mo>+</mo> <mn>1</mn> <mo>)</mo> </mrow> <mo>×</mo> <msub> <mi>A</mi> <mn>2</mn> </msub> </mrow> </math>

wherein A is₁、A₂Is a constant related to the modulation scheme;

TS _ Number is the Number of time slots occupied by the uplink transport channel (included in the time slot resource related information);

SF is a spreading factor (included in the information related to the code channel resources);

ENI is an indication of the number of E-UCCHs.

The modulation scheme may generally include Quadrature Phase Shift Keying (QPSK) and 16-ary quadrature amplitude modulation (16 QAM). The spreading factor SF is also related to the modulation scheme.

Under two modulation modes of QPSK and 16QAM_eThe conversion correspondence relationship with the authorization control information may be specifically as shown in table 1 below.

TABLE 1

Step S12: and determining a candidate E-TFC set corresponding to each modulation mode according to the received radio resource configuration information and the code rate of each E-TFC corresponding to each modulation mode.

According to the maximum code rate lambda contained in the wireless resource configuration information_maxAnd a minimum code rate λ_minAnd determining a candidate E-TFC set corresponding to each modulation mode according to the calculated code rate corresponding to each E-TFC and each modulation mode. And the code rate of each E-TFC in the candidate E-TFC set corresponding to each modulation mode is between the maximum code rate and the minimum code rate configured at the network side.

For example: two modulation modes of QPSK and 16QAM, after the determination process, the candidate E-TFC set C corresponding to the QPSK modulation mode can be obtained₁And 1 and 6QAM modulation mode candidate E-TFC set C₂. The code rates corresponding to E-TFCs in the two sets both meet the requirement

It can also be said that the transport block sizes (S) corresponding to the E-TFCs in the two sets_eI.e., TB-Size) all satisfy lambda_min×R_e≤S_e＜λ_max×R_e. It should be noted that the calculated transport block size must fall within the transport block size specified in the E-TFC table.

Note: the code rates of each E-TFC calculated in the QPSK modulation mode and the 16QAM modulation mode are different, so after the candidate E-TFC set is determined by the maximum code rate and the minimum code rate, the E-TFCs contained in the candidate E-TFC sets in the two modulation modes are probably different. Since the determined candidate E-TFC set is used for the time slot and code channel resources allocated by the network side, the information such as the time slot and code channel used in the above calculation must be consistent with the allocated authorization control information.

The above is explained by taking a scheduling mode as an example, and for a non-scheduling transmission mode, an E-TFC set C is selected₁And C₂The determination process is similar to the scheduling method except that the grant control information is specified by high-layer signaling (e.g., RB _ SETUP message), and is not described herein again.

Step S13: and the user equipment determines the code rate corresponding to the maximum authorized transmitting power which is allowed on the E-PUCH channel and corresponds to each modulation mode according to the authorized control information and the wireless resource configuration information. The method specifically comprises the following steps:

firstly, according to the spreading factor and the absolute grant value in the code channel resource related information contained in the grant control information, determining the gain factor corresponding to the maximum grant transmitting power on the E-PUCH channel.

Then, according to the wireless resource configuration information, determining a mapping relation between a gain factor and a code rate; and determining the code rate corresponding to the maximum authorized transmitting power on the E-PUCH channel according to the mapping relation.

The code rates corresponding to the maximum authorized transmitting powers for the QPSK and the 16QAM are calculated respectively, the calculation processes are the same, and only parameters are different for different modulation modes.

The detailed implementation is discussed in detail below (see the flow of FIG. 3 below)

Step S14: and determining the subset of the candidate E-TFC set as the E-TFC set corresponding to each modulation mode according to the determined code rate corresponding to the maximum authorized transmitting power corresponding to each modulation mode.

Determining the code rate lambda corresponding to the maximum authorized transmitting power according to different modulation modes_e，maxThen according to λ_e，maxFurther restricting the determined candidate E-TFC sets corresponding to the modulation modes; namely, the candidate E-TFC set for each modulation mode and the code rate corresponding to the maximum authorized transmission power:

and comparing the code rate corresponding to each E-TFC in the candidate E-TFC set corresponding to the modulation mode with the code rate corresponding to the maximum authorized transmitting power corresponding to the modulation mode. And

and forming the E-TFC set corresponding to the modulation mode by the E-TFC with the code rate smaller than the code rate corresponding to the maximum authorized transmitting power in the candidate E-TFC set.

That is to say: the code rate of each E-TFC in the E-TFC set corresponding to each determined modulation mode meets the requirement

In other words, in the determined E-TFC set corresponding to each modulation mode, the size of the transport block corresponding to each E-TFC satisfies λ_min×R_e≤S_e＜λ_e，max×R_e。

For example: aiming at candidate E-TFC set C corresponding to QPSK modulation mode₁And 16QAM modulation mode candidate E-TFC set C₂And after further restriction, obtaining an E-TFC set D corresponding to the QPSK modulation mode₁E-TFC set D corresponding to 16QAM modulation mode₂. Wherein, E-TFC set D₁And E-TFC set D₂Are respectively candidate E-TFC set C₁And candidate E-TFC set C₂A subset of (a).

Step S15: and selecting one E-TFC set for data transmission from the E-TFC sets corresponding to the modulation modes.

And aiming at all E-TFCs contained in the E-TFC set corresponding to each modulation mode, determining the E-TFC set in which the E-TFC corresponding to the maximum transmission block is located according to the size of the transmission block corresponding to each E-TFC, and selecting the E-TFC set in which the E-TFC corresponding to the maximum transmission block is located for data transmission.

And if more than one E-TFC set of the E-TFC corresponding to the maximum transport block is located, determining the E-TFC set corresponding to the modulation mode with the lowest transmission power as the E-TFC set for data transmission according to the transmission power required by each modulation mode.

For example: E-TFC corresponding to determined QPSK modulation modeSet D₁E-TFC set D corresponding to 16QAM modulation mode₂Comparison D₁And D₂The size of a transport block corresponding to each E-TFC:

if the E-TFC corresponding to the largest transport block belongs to set D only₁Then select set D₁An E-TFC set for data transmission;

if the E-TFC corresponding to the largest transport block belongs to set D only₂Then select set D₂An E-TFC set for data transmission;

if the E-TFC corresponding to the largest transport block belongs to the set D at the same time₁And D₂According to the set D₁And D₂And selecting one set with small transmission power as an E-TFC set for data transmission according to the transmission power required by the corresponding modulation mode. For example: if the transmitting power required by adopting the 16QAM modulation mode is low, selecting a set D corresponding to the 16QAM modulation mode₂Otherwise, set D corresponding to selection of QPSK modulation mode₁For data transmission.

That is, preferably, when the UE selects the E-TFC set, the E-TFC set corresponding to the modulation scheme requiring the lower PE-PUCH (E-PUCH transmit power) should be selected as much as possible.

Step S16: and encapsulating the data by adopting the modulation mode corresponding to the selected E-TFC set.

For example: for both QPSK and 16QAM modulation schemes, when the selected set for data transmission is set D₁Then, select set D₁Packaging data by the corresponding QPSK modulation mode; when the selected set for data transmission is set D₂Then select set D₂And encapsulating the data by the corresponding 16QAM modulation mode.

That is, the size of the transport block used by the UE for encapsulating the uplink data should not exceed the range of the transport block size corresponding to each E-TFC included in the selected E-TFC set. At this time, it is also effectively ensured that the code rate corresponding to the E-TFC used by the UE is between the maximum code rate and the minimum code rate configured at the network side, so that the used code rate is effective for various modulation modes such as QPSK and 16QAM, and conforms to the principle specified by the protocol.

Preferably, after the UE encapsulates the data and sends the encapsulated data, if a successful acknowledgement message from the network side is received, the UE continues to send new data; if receiving the unsuccessful confirmation message from the network side, the data needs to be retransmitted, and at this time, the data must be encapsulated by the same E-TFC used for the original data. That is, when in the retransmission state, only the E-TFC with the same transport block size as the initial transmission is in the support state.

Preferably, in step S16: before encapsulating the data by using the modulation mode corresponding to the selected E-TFC set, the method may further include:

step S17: and determining a logic channel set of data to be sent according to the scheduling type of the current transmission time interval. In step S16, the data to be sent in the determined logical channel set of the data to be sent is encapsulated by using the modulation mode corresponding to the selected E-TFC set.

The step of determining the logical channel set of data to be transmitted only needs to be performed before step S16 is performed, for example, the step may be performed before step S10, or after step S10, or after step S15, or at any time in between.

The above step S13 is a specific implementation flow of determining the subset of the candidate E-TFC set as the E-TFC set corresponding to each modulation mode according to the code rate corresponding to the determined maximum authorized transmit power, as shown in fig. 3, and includes the following steps:

step S131: and determining a gain factor corresponding to the maximum authorized transmitting power on the E-PUCH channel according to the spreading factor and the absolute authorized value contained in the code channel resource related information.

In general, the transmit power of the E-PUCH channel can be calculated by the following formula:

P_E-PUCH＝P_e-base+L+β_e

wherein, P_e-baseA closed loop power value maintained between the UE and the base station;

l is path loss, which can be generally obtained by monitoring and measuring a physical channel;

β_ethe gain factor for the E-PUCH channel is related to the allocated E-PUCH physical resources (grant control information), modulation scheme, and hybrid automatic repeat request (HARQ) power offset.

P is above_e-baseConfigured by the network side, the TPC command sent by the network side is increased or decreased by a certain value delta each time_e-base. For example: p when the "up" command of TPC is received_e-baseIncrease delta from the original value_e-base(ii) a When receiving the down command of TPC, P_e-baseDecrease of delta from the original value_e-base。Δ_e-baseThe size of the value is configured by the higher layer. Generally, in a scheduling transmission mode, a TPC command is transmitted by an E-AGCH channel; in the non-scheduled transmission mode, the TPC commands are transmitted by the E-HICH channel.

Generally, when beta_e＝P₀+α_eWhen the transmission power of the E-PUCH reaches the maximum authorized transmission power; wherein p is₀The authorization control information is an absolute authorization value contained in the authorization control information, namely an absolute authorization power value carried by an E-AGCH channel; alpha is alpha_eIs a gain factor corresponding to the spreading factor of the E-PUCH.

And alpha is_eThere is a correspondence with the spreading factor SF used for the E-PUCH as shown in table 2 below.

TABLE 2

SF α_e(dB)

1 12

2 9

4 6

8 3

16 0

That is, the gain factor corresponding to the maximum authorized transmit power of the E-PUCH channel is: beta is a_e＝P₀+α_eI.e. beta_e，max。

Step S132: and determining the mapping relation between the gain factor and the code rate according to the wireless resource configuration information. The method specifically comprises the following steps:

according to a group of reference code rates appointed by the network side, the wireless resource configuration information comprises a mapping table between the reference code rates and the reference power and a gain factor alpha corresponding to the E-PUCH spreading factor_eAnd a power offset value of hybrid automatic repeat request (HARQ), and determining a mapping relation between the gain factor and the code rate.

The radio resource configuration information includes a mapping table of the correspondence between the reference code rate and the relative reference power in transmission, i.e., a mapping table including a set of reference points. The relative reference power corresponding to each reference code rate of the E-DCH can be searched through the mapping table. There is a mapping table corresponding to each modulation mode. In general, the mapping table may be included in E-TFCS information of the RB _ SETUP message.

Maximum value lambda of a set of reference code rate lambda specified according to the network side_maxAnd a minimum value λ_min(depending on the modulation scheme) to determine a given lambda_eA lower limit lambda of a minimum value interval of₀And an upper limit lambda₁Then λ₀And λ₁Can be determined by:

(1) if λ_min≤λ_e＜λ_maxAnd then:

the code rate value of the specified reference code rate lambda satisfies lambda ≦ lambda_eThe maximum code rate of the relation is recorded as lambda₀(ii) a And

the code rate value of the specified reference code rate is all the code rate values which satisfy lambda > lambda_eThe minimum code rate of the relation is recorded as lambda₁。

(2) If λ_e＜λ_minAnd then:

let lambda₀＝λ_min(ii) a And the specified reference code rate lambda contains all code rate values satisfying lambda > lambda_minThe minimum code rate is recorded as lambda₁。

(3) If λ_e≥λ_maxAnd then:

let lambda₁＝λ_maxAnd satisfying lambda < lambda in all code rate values contained in the specified group of reference code rates_maxThe maximum code rate is recorded as lambda₀。

Thereby determining lambda_eMinimum value interval [ lambda ] of₀，λ₁) I.e. λ₀≤λ_e＜λ₁。

Inquiring a mapping table between the reference code rate and the reference power contained in the wireless resource configuration information, wherein the mapping table can be matched with the reference code rate lambda₀And λ₁Corresponding relative reference power

And

then the gain factor β (per resource unit) is normalized for the selected E-TFC and E-PUCH resource set, and then this β can be expressed as the following equation (1):

the geometric meaning of the above formula is: to be provided with

Anddetermining a straight line for the end point, and (lambda)_e，β_0，e) Is a point on the line.

According to a gain factor beta_eAnd beta_0，e、α_e、Δ_harqThe relationship between them, one can know:

gain factor beta_eSatisfies the following conditions: beta is a_e＝β_0，e+α_e+Δ_harq。

Δ_harqIs a HARQ power offset value.

Order to

Wherein i is 0, 1.

The gain factor beta can be obtained_eAnd code rate:

the geometric meaning of this formula is: translating the straight line represented by formula (1) along the Y axis by (alpha)_e+Δ_harq) The slope of the line remains unchanged.

Step S133: and determining the code rate corresponding to the maximum authorized transmitting power according to the determined mapping relation between the gain factor and the code rate and the gain factor corresponding to the maximum authorized transmitting power.

According to the mapping relation between the gain factor and the code rate determined in step S132 and the gain factor corresponding to the maximum authorized transmit power determined in step S131, the code rate corresponding to the maximum authorized transmit power can be conveniently determined.

The above step S17: and determining a logic channel set of data to be sent according to the scheduling type of the current transmission time interval. As shown in fig. 4, the method specifically includes the following steps:

step S171: it is determined whether a scheduling type within a current Transmission Time Interval (TTI) is a scheduled transmission or a non-scheduled transmission.

Step S172: and determining a first logic channel set of the data to be transmitted, which accords with the determined scheduling type, according to the scheduling type of the current transmission time interval.

For example: and determining a first logic channel set A, wherein all logic channels in the set A have data to send, and simultaneously accord with the scheduling type of the current transmission time interval, and all the logic channels belong to logic channels adopting a scheduling transmission mode or logic channels adopting a non-scheduling transmission mode.

Step S173: the logical channel of highest priority in the first set of logical channels is determined.

For example: and determining the logical channel X with the highest priority according to the priority order of the logical channels in the first logical channel set A.

Step S174: and determining the MAC-d flow (MAC-dflow) to which the logical channel with the highest priority belongs.

After the MAC-d flow to which the logical channel with the highest priority belongs is determined, the HARQ attribute configured for the flow may be selected.

Note: one logical channel may belong to only one MAC-d flow, so there is only one HARQ attribute.

Step S175: a set of logical channels for data to be transmitted is determined.

And determining the logic channel combination of the MAC-d flow which belongs to the same logic channel with the determined logic channel with the highest priority in the first logic channel set as the logic channel set of the data to be transmitted according to the MAC-d flow to which the logic channel with the highest priority in the first logic channel set belongs.

For example, if the logical channel with the highest priority in the first logical channel set a is a logical channel X, all logical channels belonging to the same MAC-d flow as the logical channel X are determined as logical channels of data to be transmitted.

According to the method for selecting the enhanced dedicated channel transport format set provided by the embodiment of the present invention, an enhanced dedicated channel transport format set selection apparatus may be constructed, as shown in fig. 5, including: a first code rate calculation module 10, a first determination module 20, a second code rate calculation module 30, a second determination module 40 and a selective encapsulation module 50.

And a first code rate calculation module 10, configured to calculate, according to the authorization control information allocated by the network side, a code rate corresponding to each modulation mode for each E-TFC.

A first determining module 20, configured to determine a candidate E-TFC set corresponding to each modulation mode according to the code rate of each E-TFC calculated by the first code rate calculating module 10 and the radio resource configuration information allocated by the network side.

And the second code rate calculation module 30 is configured to determine, according to the authorization control information and the radio resource configuration information allocated by the network side, a code rate corresponding to the maximum authorized transmit power allowed on the E-PUCH channel and corresponding to each modulation mode.

And a second determining module 40, configured to determine, according to the code rate corresponding to the maximum authorized transmit power calculated by the second code rate calculating module 30, that the subset of the candidate E-TFC set corresponding to each modulation mode, which is determined by the first determining module 20, is the E-TFC set corresponding to each modulation mode.

And a selecting and encapsulating module 50, configured to select an E-TFC set used for data transmission from the E-TFC sets corresponding to the modulation schemes determined by the second determining module 40.

And the selecting and encapsulating module 50 is further configured to, after selecting one E-TFC set used for data transmission from the E-TFC sets corresponding to the respective modulation modes, encapsulate data in the modulation mode corresponding to the selected E-TFC set.

The apparatus for selecting the enhanced dedicated channel transport format set further comprises: a channel determining module 60, configured to determine a logical channel set of data to be sent according to the scheduling type of the current transmission time interval.

The selective encapsulation module 50 is specifically configured to: and encapsulating the data to be sent in the logical channel set of the data to be sent determined by the channel determining module 60 by adopting the modulation mode corresponding to the selected E-TFC set.

A specific structure of the above-mentioned enhanced dedicated channel transport format set selection apparatus is shown in fig. 6. Wherein:

the first code rate calculation module 10 specifically includes: bit number determining section 101 and first code rate determining section 102.

A bit number determining unit 101, configured to determine, according to the authorization control information allocated by the network side, a total number of bits carried by the E-PUCH channel in each modulation mode.

Preferably, the bit number determining unit 101 further includes: a first calculation subunit 1011, a second calculation subunit 1012 and a first determination subunit 1013.

The first calculating subunit 1011 is configured to calculate, according to the code channel resource related information and the timeslot resource related information included in the authorization control information allocated by the network side, the total number of bits carried in the E-DCH signaling in each modulation mode.

A second calculating subunit 1012, configured to calculate, according to the bit number occupied by the E-UCCH number indication and the TPC command included in the grant control information, the bit number occupied by the in-band control signaling in each modulation mode.

A first determining subunit 1013, configured to calculate a difference between the total number of bits carried in the E-DCH signaling in each modulation scheme obtained by the first calculating subunit 1011 and the number of bits occupied by the in-band control signaling obtained by the second calculating subunit 1012, respectively, to obtain the total number of bits carried by the E-PUCH channel in each modulation scheme.

A first code rate determining unit 102, configured to calculate a quotient between a size of a transport block corresponding to each E-TFC and the total number of bits in each modulation mode, respectively, to obtain a code rate corresponding to each modulation mode for each E-TFC.

The first determining module 20 is specifically configured to: determining the maximum code rate lambda contained in the radio resource configuration information in the code rates corresponding to each E-TFC and each modulation mode calculated by the first code rate calculation module 10_maxAnd a minimum code rate λ_minAnd obtaining a candidate E-TFC set corresponding to each modulation mode according to the code rate.

The second code rate calculating module 30 specifically includes: gain factor determining section 301, mapping relation determining section 302, and second code rate determining section 303.

A gain factor determining unit 301, configured to determine, according to the spreading factor and the absolute grant value of each modulation scheme included in the code channel resource related information included in the grant control information, a gain factor corresponding to the maximum grant transmission power allowed on the E-pucch and corresponding to each modulation scheme.

The gain factor determining unit 301 specifically includes: a second determination subunit 3011 and a gain determination subunit 3012.

A second determining subunit 3011, configured to determine a spreading factor and α included in the code channel resource-related information_eCorresponding relation between them, determining alpha_eThe value of (c).

A gain determination subunit 3012 for determining a_eAnd determining gain factors corresponding to the maximum authorized transmitting power corresponding to each modulation mode allowed on the E-PUCH channel.

A mapping relation determining unit 302, configured to determine a mapping relation between the gain factor and the code rate according to the radio resource configuration information.

The mapping relation determining unit 302 is specifically configured to: according to a group of reference code rates appointed by the network side, the wireless resource configuration information comprises a mapping table between the reference code rates and the reference power, and alpha_eAnd a power offset value of the HARQ, and determining a mapping relation between the gain factor and the code rate.

A second code rate determining unit 303, configured to determine, according to the gain factor corresponding to the maximum authorized transmit power determined by the gain factor determining unit 301 and the mapping relationship determined by the mapping relationship determining unit 302, the code rate corresponding to the maximum authorized transmit power determined by the gain factor determining unit 301.

The second determining module 40 specifically includes: a comparison unit 401 and a set determination unit 402.

A comparing unit 401, configured to compare the code rate corresponding to each E-TFC in the candidate E-TFC set corresponding to each modulation mode with the code rate corresponding to the corresponding maximum authorized transmit power;

a set determining unit 402, configured to form an E-TFC set corresponding to each modulation mode from E-TFCs, in the candidate E-TFC set corresponding to each modulation mode, whose code rates are smaller than the code rate corresponding to the corresponding maximum authorized transmit power.

The selective encapsulation module 50 specifically includes: a first determining unit 501, a second determining unit 502, a first selecting unit 503 and an encapsulating unit 504.

A first determining unit 501, configured to determine, for all E-TFCs included in the E-TFC set corresponding to each modulation scheme, a transport block size corresponding to each E-TFC.

The second determining unit 502 determines the E-TFC set where the E-TFC corresponding to the largest transport block is located.

A first selecting unit 503, configured to select the E-TFC set where the E-TFC corresponding to the largest transport block is located, for data transmission.

An encapsulating unit 504, configured to encapsulate data by using the modulation scheme corresponding to the E-TFC set selected by the first selecting unit 503.

Preferably, the selecting of the package module 50 further includes: a second selection unit 505.

A second selecting unit 505, configured to determine, according to the transmission power required by each modulation scheme, that the E-TFC set corresponding to the modulation scheme with the lowest required transmission power is the E-TFC set used for data transmission, if there is more than one E-TFC set where the E-TFC corresponding to the largest transport block is located.

The channel determining module 60 specifically includes: a channel selection unit 601 and a channel determination unit 602.

A channel selecting unit 601, configured to determine, according to whether the scheduling type of the current transmission time interval is scheduled transmission or non-scheduled transmission, a first logical channel set having data to be sent, which conforms to the scheduling type.

A channel determining unit 602, configured to determine, according to the MAC-d flow to which the logical channel with the highest priority in the first logical channel set belongs, that a logical channel combination of the MAC-d flow in the first logical channel set that is the same as the logical channel with the highest priority belongs is a logical channel set of data to be sent.

The method and the device for selecting the enhanced dedicated channel transport format set provided by the embodiment of the invention determine a corresponding E-TFC set for each debugging mode, then select a better set for data transmission, and follow the principle that the transmission power is as small as possible during selection, thereby enabling the user equipment to realize data transmission by using the transmission power as small as possible.

When calculating the E-TFC set corresponding to each debugging mode, firstly, calculating the code rate of each selectable E-TFC (pre-configured on UE) corresponding to each modulation mode, and screening the selectable E-TFC once through the maximum and minimum code rate configured on the network side to determine a candidate E-TFC set; and then, carrying out secondary screening through the determined code rate corresponding to the maximum authorized transmitting power allowed on the E-PUCH channel and corresponding to each modulation mode to obtain an E-TFC set. Resources allocated by a network side are fully considered, not only authorization control information allocated by a base station is considered, but also radio link configuration information configured by an RNC is further considered, so that a transport format set selected by user equipment is more reasonable and effective.

And the two screening and restraining processes are combined, namely the second screening is carried out on the basis of the first screening result, so that the traversal times of the selectable E-TFC configured for the user equipment are effectively reduced, and the speed and the performance of selection in the E-TFC are improved. And quickly and effectively selecting the proper E-TFC required by the data transmission of the media access control layer within the allowed range of the network side physical resources.

The above E-TFC selection process is applicable to both HSUPA uplink data transmission in a scheduled transmission mode and uplink data transmission in a non-scheduled mode. Within the protocol framework of E-TFC selection of a media access sub-layer specified by a 3GPP protocol, the method realizes the quick and reasonable determination of an appropriate E-TFC set matched with a selected modulation mode for data transmission. On the basis of following the protocol, the efficiency and the performance are fully considered.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes, substitutions or applications that can be easily conceived by those skilled in the art within the technical scope of the present invention are also within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for enhanced dedicated channel transport format (E-TFC) set selection, comprising:

the user equipment determines code rates corresponding to maximum authorized transmitting power which is allowed on an enhanced uplink physical channel (E-PUCH) and corresponds to each modulation mode according to the authorization control information and the wireless resource configuration information;

2. The method of claim 1, wherein the calculating, according to the authorization control information allocated by the network side, the code rate corresponding to each modulation scheme of each E-TFC specifically comprises:

determining the total number of bits carried by the E-PUCH channel under each modulation mode according to the authorization control information;

and respectively calculating the quotient of the size of the transmission block corresponding to each E-TFC and the total number of the bits under each modulation mode to obtain the code rate of each E-TFC corresponding to each modulation mode.

3. The method of claim 2, wherein the authorization control information comprises: code channel resource related information, time slot resource related information and the number of E-UCCHs;

the determining the total number of bits carried by the E-pucch channel in each modulation mode specifically includes:

calculating the total number of bits carried in the E-DCH signaling under each modulation mode according to the code channel resource related information and the time slot resource related information;

calculating the bit number occupied by the in-band control signaling under each modulation mode according to the bit number occupied by the E-UCCH number indication and the TPC command;

and respectively calculating the difference value of the total number of bits carried in the E-DCH signaling and the number of bits occupied by the in-band control signaling under each modulation mode to obtain the total number of bits carried by the E-PUCH channel under each modulation mode.

4. As in claimThe method of claim 1, wherein the radio resource configuration information comprises: maximum code rate lambda_maxAnd a minimum code rate λ_min；

The determining the candidate E-TFC set corresponding to each modulation mode specifically includes:

determining the maximum code rate lambda in the code rates corresponding to each calculated E-TFC and each modulation mode_maxAnd a minimum code rate λ_minAnd obtaining a candidate E-TFC set corresponding to each modulation mode according to the code rate.

5. The method of claim 1, wherein the authorization control information comprises: code channel resource related information and an absolute grant value;

the determining the code rate corresponding to the maximum authorized transmit power allowed on the E-PUCH channel and corresponding to each modulation mode specifically includes:

for each modulation mode, the following steps are performed:

determining a gain factor corresponding to the maximum authorized transmitting power according to the spreading factor of each modulation mode and the absolute authorized value contained in the code channel resource related information;

determining a mapping relation between the gain factor and a code rate according to the wireless resource configuration information; and determining the code rate corresponding to the maximum authorized transmitting power according to the mapping relation.

6. The method of claim 5, wherein the determining the mapping relationship between the gain factor and the code rate specifically comprises:

according to a group of reference code rates appointed by the network side, the wireless resource configuration information comprises a mapping table between the reference code rates and the reference power and a gain factor alpha corresponding to the E-PUCH spreading factor_eAnd determining a mapping relation between the gain factor and the code rate according to the power offset value of the hybrid automatic repeat request HARQ.

7. The method of claim 6, wherein a mapping relationship between the gain factor and a code rate is:

wherein,

β_eis the gain factor;

λ_eis the code rate of E-TFC;

λ₀and λ₁Lambda determined from a set of reference code rates specified by the network side_eThe lower limit and the upper limit of the value range;

and

for lambda found from the mapping table₀And λ₁A corresponding relative reference power;

α_ea gain factor corresponding to the E-PUCH spreading factor;

Δ_harqis a HARQ power offset value.

8. The method of claim 1, wherein determining the E-TFC set corresponding to each modulation scheme according to the code rate corresponding to the maximum authorized transmit power comprises:

comparing the code rate corresponding to each E-TFC in the candidate E-TFC set corresponding to each modulation mode with the code rate corresponding to the maximum authorized transmitting power;

and forming the E-TFC set corresponding to each modulation mode by the E-TFC with the code rate smaller than the code rate corresponding to the corresponding maximum authorized transmitting power in the candidate E-TFC set.

9. The method of claim 1, wherein the selecting one E-TFC set for data transmission among the E-TFC sets corresponding to the respective modulation schemes specifically comprises:

aiming at all E-TFCs contained in an E-TFC set corresponding to each modulation mode, and according to the size of a transmission block corresponding to each E-TFC;

determining an E-TFC set where an E-TFC corresponding to the maximum transport block is located;

and selecting the E-TFC set in which the E-TFC corresponding to the maximum transport block is positioned for data transmission.

10. The method of claim 9, wherein if there is more than one E-TFC set corresponding to the E-TFC with the largest transport block, determining the E-TFC set corresponding to the modulation mode with the lowest required transmit power as the E-TFC set for data transmission according to the transmit power required by each modulation mode.

11. The method according to any of claims 1-10, characterized in that after selecting one E-TFC set for data transmission among the E-TFC sets corresponding to each modulation scheme, the data is encapsulated using the modulation scheme corresponding to the selected E-TFC set.

12. The method of claim 11, wherein before encapsulating the data using the modulation scheme corresponding to the selected E-TFC set, further comprising:

determining a logic channel set of data to be sent according to the scheduling type of the current transmission time interval;

the encapsulating data by using the modulation mode corresponding to the selected E-TFC set specifically includes:

and packaging the data to be sent in the determined logical channel set of the data to be sent by adopting a modulation mode corresponding to the selected E-TFC set.

13. An apparatus for enhanced dedicated channel transport format set selection, comprising:

a second code rate calculation module, configured to determine, according to the authorization control information and the radio resource configuration information, a code rate corresponding to a maximum authorized transmit power corresponding to each modulation mode that is allowed on the enhanced uplink physical channel E-PUCH;

14. The apparatus of claim 13, wherein the first code rate calculating module specifically comprises:

a bit number determining unit, configured to determine, according to the authorization control information, a total number of bits carried by the E-PUCH channel in each modulation mode;

and the first code rate determining unit is used for respectively calculating the quotient of the size of the transmission block corresponding to each E-TFC and the total number of the bits under each modulation mode to obtain the code rate of each E-TFC corresponding to each modulation mode.

15. The apparatus according to claim 14, wherein the bit number determining unit specifically includes:

a first calculating subunit, configured to calculate, according to the code channel resource related information and the time slot resource related information included in the authorization control information, a total number of bits carried in an E-DCH signaling in each modulation mode;

the second calculating subunit is used for calculating the bit number occupied by the in-band control signaling under each modulation mode according to the E-UCCH number indication and the bit number occupied by the TPC instruction;

and the first determining subunit is used for respectively calculating the difference value between the total number of bits carried in the E-DCH signaling in each modulation mode and the number of bits occupied by the in-band control signaling to obtain the total number of bits carried by the E-PUCH channel in each modulation mode.

16. The apparatus of claim 13, wherein the first determining module is specifically configured to:

determining the maximum code rate lambda contained in the wireless resource configuration information in the calculated code rates corresponding to each E-TFC and each modulation mode_maxAnd a minimum code rate λ_minAnd obtaining a candidate E-TFC set corresponding to each modulation mode according to the code rate.

17. The apparatus of claim 13, wherein the second code rate calculating module specifically comprises:

a gain factor determining unit, configured to determine a gain factor corresponding to the maximum authorized transmit power according to a spreading factor and an absolute authorized value of each modulation scheme included in code channel resource related information included in the authorization control information;

a mapping relation determining unit, configured to determine a mapping relation between the gain factor and a code rate according to the radio resource configuration information;

and the second code rate determining unit is used for determining the code rate corresponding to the maximum authorized transmitting power according to the mapping relation.

18. The apparatus according to claim 17, wherein the mapping relationship determining unit is specifically configured to:

19. The apparatus of claim 13, wherein the second determining module specifically comprises:

a comparing unit, configured to compare the code rate corresponding to each E-TFC in the candidate E-TFC set corresponding to each modulation mode with the code rate corresponding to the maximum authorized transmit power;

and the set determining unit is used for forming the E-TFC set corresponding to each modulation mode by the E-TFC with the code rate smaller than the code rate corresponding to the corresponding maximum authorized transmitting power in the candidate E-TFC set.

20. The apparatus of claim 13, wherein the selecting the encapsulation module specifically comprises:

a first determining unit, configured to determine, for all E-TFCs included in an E-TFC set corresponding to each modulation scheme, a transport block size corresponding to each E-TFC;

a second determining unit, which determines the E-TFC set where the E-TFC corresponding to the maximum transport block is located;

a first selecting unit, configured to select an E-TFC set in which the E-TFC corresponding to the largest transport block is located, for data transmission;

and the encapsulation unit is used for encapsulating the data by adopting the modulation mode corresponding to the selected E-TFC set.

21. The apparatus of claim 20, wherein the selective encapsulation module further comprises:

and the second selection unit is used for determining the E-TFC set corresponding to the modulation mode with the lowest required transmission power as the E-TFC set for data transmission according to the transmission power required by each modulation mode when more than one E-TFC sets corresponding to the E-TFC of the maximum transmission block are positioned.

22. The apparatus of any of claims 13-21, wherein the selective encapsulation module is further configured to encapsulate the data using the modulation scheme corresponding to the selected E-TFC set after selecting one E-TFC set for data transmission from the E-TFC sets corresponding to the respective modulation schemes.

23. The apparatus of claim 22, further comprising:

a channel determining module, configured to determine a logical channel set of data to be sent according to a scheduling type of a current transmission time interval;

the selective encapsulation module is specifically configured to: and packaging the data to be sent in the determined logical channel set of the data to be sent by adopting a modulation mode corresponding to the selected E-TFC set.