KR100878805B1 - Subpacket transmission parameters decision method - Google Patents

Abstract

A method of determining useable combinations of variables for transmitting a subpacket of an encoder packet in a communication system is disclosed. First, an arbitrary combination from a plurality ofall combinations of transmission variables is selected based on a number of currently useable Walsh codes and channel environment. Next, an arbitrary modulation order product code rate (MPR) is determined based on a number of useable encoder packet bits, a number of useable slots, and the number of currently useable Walsh codes, all of which belong to the selected arbitrary combination transmission variables. Thereafter, a final MPR, which is the smallest one of MPR values of a MPR set that corresponds to the number of useable encoder packet bits and the number of useable slots, is determined,and a final number of Walsh codes is calculated based on the number of useable encoder packet bits, the number of useable slots, and the determined final MPR. Finally, one or more useable combinations of variables are determined based on the final number of Walsh codes.

Description

Subpacket transmission parameters decision method

1 is a flowchart illustrating a method for determining transmission parameters in a wired and wireless communication system according to the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to transmission variable determination in a wired / wireless communication system. In particular, when it is possible to use a large number of data transmission variables for transmission and reception, a transmission variable determination that increases the efficiency of a transmission / reception end of many data transmission variables is possible. The present invention relates to a method for determining a subpacket transmission variable used in transmission by determining these.

Current variables related to packet transmission of next generation CDMA mobile communication are as follows.

First, subpacket index: k

Second, the number of bits in the encoder packet: N _EP

Number of Walsh codes available for third and kth subpackets: N _{Walhs, k}

Fourth, modulation order: m _k

Fifth, subpacket code rate: c _k

Number of slots to be used for transmission of the 6th and kth subpackets: N _{slot, k}

Modulation order product code rate of the seventh and kth subpackets: MPR _k

In general, an encoder packet refers to a transmission unit consisting of input bits of an error correction encoder in packet transmission, and the number of input bits at this time is referred to as N _EP . Here, the encoder packet is transmitted on one or more subpackets.

At this time, the first subpacket is necessarily transmitted, and the subsequent subpackets are transmitted according to the subpacket transmission request generated at the receiver when the first subpacket fails to be transmitted to the receiver. Subpackets transmitted according to a request of a receiver are classified by subpacket index k in order, and may have different c _k , N _{slot, k} , and MPR _k .

m _k is a variable indicating a modulation scheme and is represented by 2, 3, 4, 5, and 6 for QPSK, 8-PSK, 16-QAM, 32-QAM, and 64-QAM, respectively. A slot refers to a transmission unit having a certain length of time, and hereinafter, it is assumed that the slot has a length of 1.25 msec.

In addition, if the Walsh codes mentioned above are all composed of the same r chips, and chip rate is y Hz, MPR _k can be defined as Equation 1.

In this case, Equation 1 may be represented by Equation 2.

If y = 1,228,800Hz and r = 32 (chip), Equation 1 is expressed as Equation 3. (Hereinafter, for convenience of explanation, it is assumed that y = 1,228,800 and r = 32 (chip). However, the contents to be achieved in the present invention described below are applicable regardless of the values of y and r.)

At this time, a transmission method that can be used when the transmitting end transmits a packet exists by the number of combinations of {N _{Walhs, k,} N _{slot, k} , m _k, N _EP } values, and the transmitting end is in the possible combinations according to the situation. You choose the appropriate one. However, these possible combinations include combinations that are not suitable for practical use, so they are excluded under certain rules. At this time, examples of specific rules currently used include Equations 4 and 5.

Tables 1, 2, and 3 shown below show examples of types of transmission schemes that satisfy Equations 4 and 5 among transmission schemes that can be used by the transmitter to transmit packets. The MPR _k values shown in the following tables and examples are approximate and should be used in more accurate calculations in practice.

Table 1 shows an example of a transmission scheme that can be used when a transmitter transmits a packet when N _EP = 3864 and N _{slot, k} = 4.

In addition, Table 2 is a table showing an example of a transmission method that can be used when the transmitter transmits a packet when N _EP = 3864, N _{slot, k} = 2.

Table 3 shows an example of a transmission method that can be used when the transmitter transmits a packet when N _EP = 3864 and N _{slot, k} = 1.

In this case, each row of Tables 1 to 3 refers to a specific combination of transmission-related variables, hereinafter, such a combination is referred to as a 'transmission scheme combination'.

The set having all of these transmission scheme combinations as constituent elements is referred to as 'transmission_method_combination_All'. That is, the transmission method combinations shown in Tables 1, 2, and 3 represent some elements of 'transmission_method_combination_All'.                         

In such a prior art, a combination of transmission schemes that a transmitter can use when transmitting a packet increases as the number of values that N _{Walhs, k,} N _{slot, k} , m _{k, and} N _EP can have. When such a combination of many transmission methods is possible (that is, when the number of elements of the 'transmission_method_combination_All' is large), the following problem occurs.

First, the transceiver (e.g., base station (BTS or BS) and mobile station (MS)) store the variables for all possible combinations of transmission schemes (i.e. all elements of 'transmission_method_combination_All'). It must be stored in the system, which causes unnecessary memory waste.

Second, some of the rarely used transmission scheme combinations have a very small C _k , which is also a waste of memory since the receiver must have a large amount of receive memory to support this.

The present invention has been made in view of the above-mentioned problems of the prior art, and in the case where it is possible to use a very large number of combinations of transmission schemes for transmission and reception in a wired / wireless communication system, in order to increase the efficiency of the transmission / reception stage, all possible It is an object of the present invention to provide a method for determining a subpacket transmission variable in which only a part of transmission scheme combinations can be efficiently used by a transceiver.

According to one aspect of the present invention, a transmission scheme combination of one of a plurality of first transmission scheme combinations for transmitting an encoder packet consisting of input bits of an error correction encoder from a transmitting end to a receiving end through a subpacket. In the case of selecting, classifying the first plurality of total transmission scheme combinations into a plurality of second plurality of partial transmission scheme combinations having a constant equal interval, and the classified plurality of second plurality of partial transmissions. Determining a transmission scheme combination of one of the scheme combinations is selected during the subpacket transmission, and determining a temporary modulation index code rate among a plurality of variables belonging to the transmission scheme combination according to the number of Walsh codes currently available and the channel environment. Determining the partial transmission scheme according to the determined temporal modulation index code rate. This is selected.

Preferably, the temporary modulation index code rate, the number of bits of the encoder packet, the number of slots to be used for the transmission of the subpacket, the number of temporary Walsh codes, the number of chips and the chip rate of the transmission-related variables constituting the transmission scheme combination Decide accordingly.

Preferably, the modulation index code rate of one transmission scheme combination of the second plurality of partial transmission scheme combinations to which the temporary modulation index code rate belongs is determined according to the temporary modulation index code rate.

Preferably, the subpacket transmits the number of Walsh codes determined according to the modulation index code rate and the number of bits, slots, chips, and chip rate of the encoder packet.

Preferably, among the temporary modulation index code rate, the number of Walsh codes determined according to the number of bits, slots, chips, and chip rate of the encoder packet, and one transmission method combination belonging to the second plurality of partial transmission method combinations. The maximum number of Walsh codes equal to or greater than the number of the smallest Walsh codes according to the number of bits of the encoder packet and the number of slots to be used for transmission of the subpacket is transmitted.                         

Preferably, the modulation index code rate is the smallest modulation index among several modulation index code rates having a value equal to or greater than the temporary modulation index code rate among the modulation rate code rates belonging to one transmission scheme combination selected to be selected. Determined by the code rate.

Preferably, the modulation index code rate is equal to the temporary modulation index code rate from among several modulation index code rates belonging to one transmission scheme combination determined to be selected when the temporary modulation index code rate is less than the minimum temporary modulation code rate. It is determined by the smallest modulation index code rate among several modulation index code rates having the same or larger value. When the temporary modulation index code rate is greater than or equal to the minimum temporary modulation code rate, the temporary modulation code rate is determined.

라하고, 상기 부패킷의 전송을 위해 사용될 슬롯 수를

라 하며, 상기 임시 왈쉬 코드 개수를 N_Walsh,_k라 하며, 상기 칩 수 및 칩 전송율을 X라 할 때,

에 의해 결정한다.Preferably, the temporary modulation index code rate is a temporary modulation code rate, MPR, _{k, d, g} , the number of bits of the encoder packet of the transmission-related variables constituting the combination of the transmission scheme

The number of slots to be used for transmission of the subpacket

When the number of temporary Walsh codes is N _Walsh , _k , and the number of chips and the chip rate are X,

Decide by

라 하며, 상기 부패킷의 전송을 위해 사용될 슬롯 수를

라하고, 상기 칩 수 및 칩 전송율을 X라 할 때,

에 의해 결정된 왈쉬 코드 개수를 이용하여 전송한다.Preferably, the subpacket is the modulation index code rate MPR ' _{k, d, g} and the number of bits of the encoder packet

The number of slots to be used for transmission of the subpacket

When the number of chips and the chip transfer rate is X,

Transmit using the number of Walsh codes determined by.

라 하며, 상기 부패킷의 전송을 위해 사용될 슬롯 수를

라하고, 상기 칩 수 및 칩 전송율을 X라 할 때,

에 의해 결정된 왈쉬 코드 개수와, 상기 복수의 전송 방식 조합에 속하는 전송 방식 조합 중에서

일 경우에 가질 수 있는 가장 작은 N_Walsh,_k의 값 중에서 같거나 큰 값의 최대 왈쉬 코드를 이용하여 전송한다.Preferably, the subpacket is the modulation index code rate MPR ' _{k, d, g} and the number of bits of the encoder packet

The number of slots to be used for transmission of the subpacket

When the number of chips and the chip transfer rate is X,

The number of Walsh codes determined by and a combination of transmission schemes belonging to the plurality of transmission scheme combinations

In this case, the largest Walsh code having the same or larger value than the smallest N _Walsh and _k values is transmitted.

Preferably, the constant equal interval may be classified by comparing a modulation index code rate among transmission-related variables constituting the transmission scheme combination with a next set S.

Preferably, in the method for determining the subpacket transmission variable, when the modulation index m _k is 3 or 4 among the transmission related variables constituting the transmission scheme combination, the subpacket transmission variable is determined according to the temporary modulation index code rate.

Preferably, when the selected partial transmission scheme combination is transmitted to the receiving side through a packet data control channel, an index given to the entire transmission scheme combination and the partial transmission scheme combination is transmitted.

Preferably, the modulation index code rate is MPR ' _{k, d, g} ,

라 하며, 상기 부패킷의 전송을 위해 사용될 슬롯 수를

라하고, 상기 칩 수 및 칩 전송율을 X라 하고,The number of bits in the encoder packet

The number of slots to be used for transmission of the subpacket

And the number of chips and the chip transfer rate is X,

일 경우에 해당하는 m_k의 값을 m_k,d,g라 하며, 상기 부패킷을 전송하기 위한 부패킷 전송 심볼 수를 N'_Walsh,k라 하고, Among the transmission scheme combinations belonging to the entire transmission scheme combination,

Referred to the value of _k m for the case of m _{k, d, g} referred to the packet transmission unit number of symbols for transmitting the sub-packets N _'Walsh,, and _k, and

The number of transmitted symbols of the subpacket N ' _{Walsh, k}

로 구할 때, 상기 전송 심볼 수 N'_Walsh,k가, 기 설정된 수(Lmax) 이상이 되는 전송 방식 조합은 제외한다.

In this case, a combination of transmission schemes in which the number of transmission symbols N ' _{Walsh, k} becomes equal to or greater than a predetermined number Lmax is excluded.

Preferably, the predetermined distance is such a modulation index code rate of the transmission-related parameters to configure the transmission scheme, and then combining a set S _1,1, where:

Classify in comparison with                         

Preferably, the index according to the partial transmission scheme combination of the transmission scheme combinations,

It consists of.

Preferably, the index is found through the slot length according to the transmission time length of the packet data control channel.

Preferably, when the constant equal interval is a modulation index code rate among transmission-related variables constituting the transmission scheme combination, the next set S _{d, g} ,

,

,

,

,

,

,

,

,

,

,

,

,

Classify in comparison with at least one of.                         

Preferably, the index according to the partial transmission scheme combination of the transmission scheme combinations,

It consists of.                         

Preferably, when the constant equal interval is a modulation index code rate among transmission-related variables constituting the transmission scheme combination, the next set S _1,1 ,

과 비교하여 분류한다.

Classify in comparison with

Preferably, N ' _Walsh , _k of the transmission-related variables is the MPR' _{k, d, g} value of the elements of the S ₁ , ₁ equal to or greater than MPR ' _{k, d, g} of the elements It calculates when it is a value of a small element, and the said Lmax value is 7728.

Preferably, the index according to the partial transmission scheme combination of the transmission scheme combinations is                         

,

It consists of.

Preferably, the constant equal interval is set to the modulation index code rate of the transmission-related variables constituting the transmission scheme combination S _1,1 , where S _1,1 = {0.607, 1.175, 1.5, 1.8, 2.43, 2.688 , 3.2}.

Preferably, N ' _Walsh , _k of the transmission-related variables is the MPR' _{k, d, g} value of the elements of the S ₁ , ₁ equal to or greater than MPR ' _{k, d, g} of the elements It calculates when it is a value of a small element, and the said Lmax value is 7728.

And the index according to the partial transmission scheme combination of the transmission scheme combinations,

It consists of.

Preferably, the constant equal interval sets a modulation index code rate among transmission-related variables constituting the combination of transmission schemes, and then sets S _1,1 , where S _1,1 = {0.607, 1.175, 1.5, 2.0, 2.52, 2.96, Classify in comparison with 3.2}.

Preferably, N ' _Walsh , _k of the transmission-related variables is the MPR' _{k, d, g} value of the elements of the S ₁ , ₁ equal to or greater than MPR ' _{k, d, g} of the elements It calculates when it is a value of a small element, and the said Lmax value is 7728.

Preferably, the index according to the partial transmission scheme combination of the transmission scheme combinations,

It consists of.                         

Preferably, the constant equal interval sets a modulation index code rate among transmission-related variables constituting the combination of transmission schemes, and then sets S _1,1 , where S _1,1 = {0.607, 1.175, 1.5, 2.0, 2.684, 3.2}. Classify in comparison with

Preferably, N ' _Walsh , _k of the transmission-related variables is the MPR' _{k, d, g} value of the elements of the S ₁ , ₁ equal to or greater than MPR ' _{k, d, g} of the elements It calculates when it is a value of a small element, and the said Lmax value is 7728.

Preferably, the index according to the partial transmission scheme combination of the transmission scheme combinations,

It consists of.

Preferably, '11110' or '11111' in the transmission scheme combination index is used as an index for the base station to transition the current state of the terminal.

The current state of the terminal is one of a 'control hold' or 'active' state.

Preferably, the base station transmits the index to the terminal through a packet data control channel.

Preferably, when all partial transmission scheme combinations corresponding to one transmission scheme combination index among the transmission scheme combination indexes are configured as 'Reserved', the combination belonging to the transmission scheme combination index indicates that the base station controls the current state of the terminal. It is used as a combination of partial transmission methods to transition from the state to the active state.

Preferably, the constant equal interval is S _1,1 = {0.601, 1.175, 1.5, 2.0, 2.52, when the modulation index code rate among the transmission-related variables constituting the transmission scheme combination is set to the next set S _1,1 ; 2.96, 3.2}.

Preferably, N ' _Walsh , _k of the transmission-related variables is the MPR' _{k, d, g} value of the elements of the S ₁ , ₁ equal to or greater than MPR ' _{k, d, g} of the elements It calculates when it is a value of a small element and the said Lmax value is 11592.

Preferably, the index according to the partial transmission scheme combination of the transmission scheme combinations,

It consists of.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

Hereinafter, a configuration and an operation according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

First, in order to increase the efficiency of the transmitting and receiving end, the following equations (6), (7) and (8) are predefined in order to enable only a part of all possible combinations of transmission schemes to be efficiently used by the transmitting and receiving end.

에 속한 D 개의 자연수들 중의 어느 한 가지 값이다.That is, the value that N _EP can have is a set

Any one of the D natural numbers in.

값보다 같거나 작은 자연수이다. And N _{Walhs, k}

Natural number less than or equal to value.

에 속한 G 개의 자연수들 중의 어느 한 가지 값이다. Also, the value that N _{slot, k} can have is a set

Any one of the G natural numbers in.

일 경우의 전송 방식 조합에 해당하는 MPR_k의 값을 MPR_k,d,g 라고 할 경우, MPR_k,d,g은 상기 수학식 3에 의하여 식 9와 같이 같이 표현된다.The number of Walsh codes currently available is N _{Walhs, k} ,

If the value of MPR _k that corresponds to the transmission mode when the combination of said _{MPR k, d, g, MPR} k, d, g can be expressed as as shown by the equation (3) (9).

In this case, a new variable N ' _{Walhs, k} representing the number of Walsh codes to be used for the transmission of the kth subpacket of an arbitrary encoder packet may be defined as in Equation 10 or Equation 11.

'는 x와 같거나 큰 정수들 중에서 가장 작은 수를 의미하며, max(a,b)는 a, b중에서 같거나 큰 값을 출력시키는 함수이다. At this time, '

'Is the smallest number among integers greater than or equal to x, and max (a, b) is a function that outputs the same or greater value among a and b.

는 '전송_방식_조합_ALL'에 속하는 전송 방식 조합 중에서

일 경우에 가질 수 있는 가장 작은 N_Walhs,k 의 값을 의미한다.In addition, equation (11)

Is a combination of transmission methods belonging to 'transmission_method_combination_ALL'

In this case, it means the smallest value of N _{Walhs, k} .

And in Equation 10, the value of MPR ' _{k, d, g} is determined by the following first or second definition.

First Definition

The MPR'k _{, d, g} value is the value of the smallest element among the elements having the same value as or larger than MPR'k _{, d, g} among the elements of the set S _{d, g} as shown in Expression (12).

Second Definition

일 경우, MPR'_k,d,g값은, 집합 S_d,g의 원소 중에서MPR_k,d,g와 같거나 큰 값을 가지는 원소들 중에서 가장 작은 원소의 값이다.One.

In this case, the MPR ' _{k, d, g} value is the value of the smallest element among the elements having a value equal to or greater than MPR _{k, d, g} among the elements of the set S _{d, g} .

일 경우, MPR'_k,d,g 값은 MPR_k,d,g이다(MPR'_k,d,g=MPR_k,d,g). 2.MPR ' _{k, d, g ≥}

In this case, MPR'k _{, d, g} values are MPR _{k, d, g} (MPR'k _{, d, g} = MPR _{k, d, g} ).

는 미리 정의된 실수로써, '전송_방식_조합_All'에 속하는 특정 전송 방식 조합들이 본 발명에 의거하여 모두 선택가능 하도록 하는 역할을 한다. In this case, in the second definition,

Is a predefined real number, and serves to select all of the specific transmission scheme combinations belonging to 'transmission_method_combination_All' according to the present invention.

Meanwhile, in the above definitions, the set S _{d, g} is defined as in Equation 12.

Here, the number of elements of S _{d, g} is H _{d, g} , and these are real numbers in which the relationship shown in Equation 13 holds.

이고, 최대 값은

이 된다. That is, the minimum value among the elements of S _{d, g} is

, The maximum value is

Becomes

와

의 각 조합에 대하여 각각 정의되며, 구현의 편이 상

와

의 각 조합들 중 모두 혹은 일부에 해당하는 S_d,g가 동일할 수 있다.S _{d, g} is

Wow

Defined separately for each combination of,

Wow

S _{d, g} corresponding to all or part of each combination of may be the same.

인 전송 방식 조합들 중에서 N'_Walhs,k개의 왈쉬 코드(Walsh code)를 사용하는 전송 방식 조합을 선택하게 된다.Based on the above equations, the transmitting end belongs to 'transmission_method_combination_All' for packet transmission.

Among the transmission scheme combinations, a transmission scheme combination using N ' _{Walhs, k} Walsh codes is selected.

In this case, the important point is that the set of 'transmission method combinations' selectable using the equations proposed by the present invention becomes a subset of 'transmission_method_combination_All'. That is, the transmitting and receiving end may use only a part of the 'combination method combinations' previously available. Hereinafter, this subset is referred to as 'transmission_method_combination_PART'.

1 illustrates an example of a process of determining a combination of transmission schemes for transmission of a k-th subpacket of an encoder packet based on the above description.

와

의 각 조합에 대하여 미리 정의된 S_d,g들을 알고 있다고 전제한다.At this time, the transmitting end (or transmitting and receiving end)

Wow

We assume that we know the predefined S _{d, g} for each combination of.

On the other hand, once the transmission scheme combination is determined, the transmitting end transmits the subpacket according to the selected transmission scheme combination, and should inform the receiving side of what the selected transmission scheme combination is. That is, transmission-related variables corresponding to the selected transmission scheme combination should be informed.

In general, these transmission related variables are informed to the receiver through a physical channel for professionally transmitting control information. This channel is hereinafter referred to as a packet data control channel (PDCCH).

In the present invention, the transmitting end does not directly inform the receiving end through the PDCCH, but assigns an index to each transmission scheme combination and transmits only the index. This is possible because the number of elements of the 'transmission_method_combination_PART', which is a set of transmission scheme combinations that can be selected according to the present invention, is smaller than the number of elements of the conventional 'transmission_method_combination_ALL'. Have efficiency. Hereinafter, such an index will be referred to as a 'transfer method combination index'.

Meanwhile, in order to reduce the complexity of hardware implementation in the receiver side of the 'transmission_method_combination_PART' obtained according to the proposed scheme, the number of transmission symbols of the subpacket becomes more than a certain number (hereinafter referred to as Lmax). In this case, the equation for obtaining the variable N ' _{Walsh, k} is summarized as in Equation 14 below.

는 x와 같거나 작은 정수들 중에서 가장 큰 수를 의미하며, min(a,b)는 a, b중에서 같거나 작은 값을 출력시키는 함수이다. 또한, 식 14의 m_k,d,g는 '전송_방식_조합_ALL'에 속하는 전송 방식 조합 중에서,At this time,

Is the largest number among integers less than or equal to x, and min (a, b) is a function that outputs less than or equal to a and b. In addition, m _{k, d, g} in Equation 14 is a combination of transmission schemes belonging to 'transmission_method_combination_ALL',

일 경우에 해당하는 m_k의 값을 의미한다,

Means the value of m _k ,

First, the first embodiment of the present invention is described under the assumption of the following equations 15 to 18.

In Equation 15,

This is assumed.                     

이 가정된다.In equation (17)

This is assumed.

It is also assumed that S _{d, g} are all the same, and all are the same as S in Equation 18.

Based on the above assumptions, the existing 'transmission_method_combination_ALL' that satisfies Equations 4 and 5 is determined.

Table 4 shows a combination of transmission schemes where N _EP = 3864 among the elements of 'transmission_method_combination_ALL'.

In this case, a method of obtaining a combination of transmission schemes through the process of FIG. 1 according to the present invention will be described below.

The number of Walsh codes currently available is N _{Walhs, k} = 17, and the combination of transmission methods selected from 'transmission_method_combination_ALL' in consideration of the channel environment, etc.

이다(S11).

(S11).

At this time, if MPR _{k, 6,3} is obtained by Equation 9, MPR _{k, 6,3} = 1.1838 (S12).

If MPR ' _{k, 6,3} is obtained according to MPR _{k, 6,3} , S and the first definition, MPR'k, which is the value of the smallest element among the elements having a value equal to or greater than MPR _{k, 6,3} = 1.1838 _{, 6,3} = 1.3 (S13).

When N ' _{Walhs, k} is calculated for the _{MPR'k , 6, 3} by Equation 10, N _{Walhs, k} = 16 (S14).

인 '전송 방식 조합'들 중에서 왈쉬 코드(Walsh code)의 개수가 16인 '전송 방식 조합'이 최종적으로 선택되며, 이는 표 4의 음영부분에 나타낸 바와 같다(S15).Therefore, in the following table 4

Among the 'transmission method combinations', 'transmission method combinations' having a number of Walsh codes 16 are finally selected, as shown in the shaded portion of Table 4 (S15).

Under the assumptions of equations 15 to 18 and the assumption of equation 19, the second embodiment of the present invention is as follows.                     

At this time, a description will be given of an example of obtaining a combination of transmission schemes according to the present invention.

The number of Walsh codes currently available is N _{Walhs, k} = 26, and the combination of transmission methods selected from 'transmission_method_combination_ALL' is considered in consideration of the channel environment.

이다(S11).

(S11).

At this time, if MPR _{k, 6,2} is obtained by Equation 9, MPR _{k, 6,2} = 1.5481 (S12).

If MPR'k _{, 6,2} is obtained according to MPR _{k, 6,2} and S and the second definition, MPR'k _{, 6,2} = MPR _{k, 6,2 =} 1.5481 (S13).

When N ' _{Walhs, k} is calculated for the _{MPR'k , 6,2 based} on Equation 10, N _{Walhs, k} = 26 (S14).

인 '전송 방식 조합'들 중에서 왈쉬 코드(Walsh code)의 개수가 26인 '전송 방식 조합'이 최종적으로 선택된다(S15). 본 예제에 따르면, m_k가 3이상일 경우, 기존의 변조 방식 조합과 본 발명에 의한 변조 방식 조합은 일치한다. Thus in Table 4 above

Among the 'transmission method combinations', the 'transmission method combination' having a number of Walsh codes 26 is finally selected (S15). According to this example, when m _k is 3 or more, the existing modulation scheme combination and the modulation scheme combination according to the present invention coincide.

Under the assumptions of Equations 15 to 18 and the assumption of Equation 20, the third embodiment is as follows.

At this time, a description will be given of an example of obtaining a combination of transmission schemes according to the present invention.

이다(S11).The number of Walsh codes currently available is N _{Walhs, k} = 14, and the combination of transmission methods selected from 'transmission_method_combination_ALL' is considered in consideration of the channel environment.

(S11).

At this time, if MPR _{k, 6,2} is obtained by Equation 9, MPR _{k, 6,2} = 2.8750 (S12).

If MPR'k _{, 6,2} is obtained according to MPR _{k, 6,2} and S and the second definition, MPR'k _{, 6,2} = MPR _{k, 6,2} 2.8750 (S13).

When N ' _{Walhs, k} is calculated for the _{MPR'k , 6,2 based} on Equation 10, N _{Walhs, k} = 14 (S14).

인 '전송 방식 조합'들 중에서 왈쉬 코드(Walsh code)의 개수가 14인 '전송 방식 조합'이 최종적으로 선택된다(S15). 본 실시예에 따르면, m_k가 4이상일 경우, 기존의 변조 방식 조합과 본 발명에 의한 변조 방식 조합은 일치한다. Thus in Table 4 above

Among the 'transmission method combinations', 'transmission method combinations' having a number of Walsh codes of 14 are finally selected (S15). According to this embodiment, when m _k is 4 or more, the existing modulation scheme combination and the modulation scheme combination according to the present invention coincide.

The fourth embodiment of the present invention is also described under the assumptions of Equations 15 to 17 and the following Equation 21.

[Equation 15]

[Equation 16]

[Equation 17]

In Equation 15,

This is assumed.

이 가정 된다.And in equation (17)

This is assumed.

In addition, the remaining S except _1,1 S _{d, g} is assumed equal to the (21) all of the S _1,1.

Based on the above assumptions, the existing 'transmission_method_combination_ALL' which satisfies Equations 4 and 5 is determined. In this case, the transmission scheme combination is obtained through the process of FIG. 1 according to the present invention. For example, as follows.

The number of Walsh codes currently available is N _{Walhs, k} = 23, and the combination of transmission methods selected from 'transmission_method_combination_ALL' in consideration of the channel environment, etc.

이다(S11).

(S11).

At this time, if MPR _{k, 6, 3} is obtained by Equation 9, MPR _{k, 6, 3} = 0.8750 (S12).

If MPR ' _{k, 6,3} is obtained according to MPR _{k, 6,3} , S and the first definition, MPR'k, which is the value of the smallest element among the elements having a value equal to or greater than MPR _{k, 6,3} = 0.8750 _{, 6,3} = 1.02 (S13).

When N ' _{Walhs, k} is calculated for the _{MPR'k , 6, 3} by Equation 10, N _{Walhs, k} = 20 (S14).

인 '전송 방식 조합'들 중에서 왈쉬 코드(Walsh code)의 개수가 20인 '전송 방식 조합'이 최종적으로 선택되며, 이는 표 5의 음영부분에 나타낸 바와 같다(S15). Therefore, in the following table 5

Among the 'transmission method combinations', 'transmission method combinations' having a number of Walsh codes of 20 are finally selected, as shown in the shaded portion of Table 5 (S15).

Table 6 shows 'transmission_method_combination_parts', which are sets of transmission method combinations that can be selected according to the present invention in the case of the fifth embodiment, and then transmits each of the transmission_method_combination_parts. An embodiment of giving a transmission scheme combination index to a scheme combination is shown.                     

In this case, the 'transmission method combination index' is represented in binary, and when it is transmitted through the PDCCH, 6 bits are required.

MPR _K , m _k , and c _k values are obtained by N _EP, N _{Slot, k} N _Walsh , and _k values, so Table 6 shows the elements of 'transmission_method_combination_PART' as N _EP, N _{Slot, k} N _Walsh. , _k values are summarized.

In Table 6, three types of transmission method combinations are assigned to each 'transmission method combination index'. After the receiver receives a 'transmission scheme combination index' through the PDCCH, it is necessary to find out which of the three transmission scheme combinations corresponding to the index is real, which can be determined through the transmission time length of the PDCCH.

For example, as in the case of the PDCCH included in the cdma2000 Revision C, when the transmission time length of the PDCCH has a length of 1 slot, 2 slots, and 4 slots, respectively, when the N _{Slot, k} values are 1,2,4, the receiver receives the receiver. N _{Slot, k} can be known according to the transmission time length of the PDCCH. Thereafter, after analyzing the 'transmission method combination index' transmitted through the PDCCH, the corresponding transmission method combination can be known through Table 6.

In Table 6, the part denoted reserved means that a specific combination of transmission schemes can be added later as needed. In this case, the first definition is used in the fifth embodiment.

The sixth embodiment of the present invention is also described under the assumption that equations 15 to 17 and the following equations 22 to 27 are assumed.                     

[Equation 15]

[Equation 16]

[Equation 17]

In Equation 15,

This is assumed.

이 가정된다.In equation (17)

This is assumed.

In addition _, the first definition and Equation 10 are used to calculate N ' _{Walsh, k} .

Based on the above assumptions, the existing 'transmission_method_combination_ALL' that satisfies Expressions 4 and 5 is determined.

In Table 6, in the sixth embodiment of the present invention, after obtaining 'transmission_method_combination_parts', which are sets of transmission method combinations that can be selected according to the present invention, each of 'transmission_method_combination_parts' is determined. An example of giving a transmission method combination index to a transmission method combination is shown.                     

In the seventh embodiment of the present invention, Equations 15 to 17 and Equation 28 below are described under the assumption.

[Equation 15]

[Equation 16]

[Equation 17]

In Equation 15,

This is assumed.

이 가정된다. And in equation (17)

This is assumed.

In addition, with the exception of the S _1,1 S _{d, g} are both assumed to be equal to S _1,1. In addition _, the first definition and Equation 14 are used to calculate N ' _{Walsh, k} . In this case, it is assumed that the Lmax value of Equation 14 is 7728.

Based on the above assumptions, the existing 'transmission_method_combination_ALL' that satisfies Equations 4 and 5 is determined.

Table 8 shows, in the seventh embodiment of the present invention, each of the 'transmission_method_combination_parts' after obtaining 'transmission_method_combination_parts', which is a set of transmission method combinations that can be selected by the present invention. An example of giving a transmission method combination index to a transmission method combination is shown.                     

An eighth embodiment of the present invention is also described under the assumptions of equations (15) to (17) and the following equation (29).

[Equation 15]

[Equation 16]

[Equation 17]

S _1,1 = {0.607, 1.175, 1.5, 1.8, 2.43, 2.688, 3.2}

In Equation 15,

This is assumed.

이 가정된다. And in equation (17)

This is assumed.

In addition, with the exception of the S _1,1 S _{d, g} are both assumed to be equal to S _1,1. In addition _, the first definition and Equation 14 are used to calculate N ' _{Walsh, k} . In this case, it is assumed that the Lmax value of Equation 14 is 7728.

Based on the above assumptions, the existing 'transmission_method_combination_ALL' that satisfies Equations 4 and 5 is determined.

In Table 8, according to the eighth embodiment of the present invention, after obtaining 'transmission_method_combination_parts' which is a set of transmission method combinations that can be selected by the present invention, An example of giving a transmission method combination index to a transmission method combination is shown.                     

A ninth embodiment of the present invention is also described under the assumptions of equations (15) to (17) and the following equation (30).

[Equation 15]

[Equation 16]

[Equation 17]

S _1.1 = {0.607, 1.175, 1.5, 2.0, 2.52, 2.96, 3.2}

In Equation 15,

This is assumed.

이 가정된다.And in equation (17)

This is assumed.

In addition, with the exception of the S _1,1 S _{d, g} are both assumed to be equal to S _1,1. In addition _, the first definition and Equation 14 are used to calculate N ' _{Walsh, k} . In this case, it is assumed that the Lmax value of Equation 14 is 7728.

Based on the above assumptions, the existing 'transmission_method_combination_ALL' that satisfies Expressions 4 and 5 is determined.

Table 10 shows, in the ninth embodiment of the present invention, each of the 'transmission_method_combination_parts' after obtaining 'transmission_method_combination_parts', which is a set of transmission method combinations that can be selected by the present invention. An example of giving a transmission method combination index to a transmission method combination is shown.

A tenth embodiment of the present invention is also described under the assumption of equations (15) to (17) and the following equation (31).                     

[Equation 15]

[Equation 16]

[Equation 17]

S _1.1 = {0.607, 1.175, 1.5, 2.0, 2.684, 3.2}

In Equation 15,

This is assumed.

이 가정된다.And in equation (17)

This is assumed.

In addition, with the exception of the S _1,1 S _{d, g} are both assumed to be equal to S _1,1. In addition _, the first definition and Equation 14 are used to calculate N ' _{Walsh, k} . In this case, it is assumed that the Lmax value of Equation 14 is 7728.

Based on the above assumptions, the existing 'transmission_method_combination_ALL' that satisfies Equations 4 and 5 is determined.

In Table 10, in the tenth embodiment of the present invention, after obtaining 'transmission_method_combination_parts', which are sets of transmission method combinations that can be selected according to the present invention, An example of giving a transmission method combination index to a transmission method combination is shown.                     

In Table 11, as in the case of the "transfer method combination index" of "11110" and "11111", the "transfer method combination in which all three types of transmission combinations belonging to the" transfer method combination index "are represented as" reserved ". Indexes' are present. Such a 'transfer method combination index' may be used for other purposes than a specific combination of transmission methods.

For example, when the base station BS needs to command the terminal MS to transition from the "control hold state" to the "active state" as in the CDMA2000 REVISION C, the specific 'transmission method combination index' is described. Can be used. That is, when the base station BS sets the 'transmission method combination index' to '11111' (or '11110') and transmits the data through the PDCCH, the mobile station MS changes this from the "control hold state" to the "active state". It can be regarded as an order to make a transition and action can be taken according to predetermined rules.

The eleventh embodiment of the present invention is also described under the assumptions of Equations 15 to 17 and Equation 32 below.

[Equation 15]

[Equation 16]

[Equation 17]

S _1,1 = {0.601, 1.175, 1.5, 2.0, 2.52, 2.96, 3.2}

In Equation 15,

This is assumed.

이 가정된다.And in equation (17)

This is assumed.

In addition, with the exception of the S _1,1 S _{d, g} are both assumed to be equal to S _1,1. In addition _, the first definition and Equation 14 are used to calculate N ' _{Walsh, k} . In this case, it is assumed that the Lmax value of Equation 14 is 11592 .

Based on the above assumptions, the existing 'transmission_method_combination_ALL' that satisfies Equations 4 and 5 is determined.

Table 12 shows, in the eleventh embodiment of the present invention, each of the 'transmission_method_combination_parts' after obtaining 'transmission_method_combination_parts', which is a set of transmission method combinations that can be selected by the present invention. An example of giving a transmission method combination index to a transmission method combination is shown.                     

The twelfth embodiment of the present invention is also described under the assumptions of Equations 15 to 17 and Equation 33 below.

[Equation 15]

[Equation 16]

[Equation 17]

S _1,1 = {0.41, 0.79, 1.10, 1.32, 1.50, 1.75, 1.95, 2.30, 2.58, 2.85, 3.10}

In Equation 15,

This is assumed.

이 가정된다.And in equation (17)

This is assumed.

In addition, with the exception of the S _1,1 S _{d, g} are both assumed to be equal to S _1,1. In addition _, the first definition and Equation 10 are used to calculate N ' _{Walsh, k} .

Tables 13a to 13d show 'transmission_method_combination_part', which is a set of transmission scheme combinations selected by the present invention in the twelfth embodiment of the present invention, and table 14 shows the twelfth embodiment of the present invention. An example of assigning a transmission scheme combination index to each transmission scheme combination of the transmission_method_combination_PART shown in Tables 13A to 13D is shown.                     

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

When the combination of transmission schemes is selected according to the present invention, fewer combinations of transmission schemes can be used without significant performance degradation of the system, thereby enabling efficient transmission and reception. It is also possible to implement a transceiver end with less hardware complexity.

Claims (42)

In the subpacket transmission variable determining method of selecting a specific transmission scheme combination from transmission_method_combination_ALL in order to transmit an encoder packet consisting of input bits of an error correction encoder from a transmission end to a reception end via a subpacket, Selecting a transmission_method_combination_part from the transmission_method_combination_all based on a modulation index code rate; Determining a temporal modulation index code rate according to the number of Walsh codes currently available and the channel environment; And And selecting a specific transmission scheme combination from the transmission_method_combination_PART according to the determined temporary modulation index code rate. The method of claim 1, wherein the temporary modulation index code rate is determined according to the number of bits of the encoder packet, the number of slots to be used for subpacket transmission, the number of Walsh codes currently available, the number of chips and the chip rate How to determine packet transmission variables. 3. The method of claim 2, further comprising determining a modulation index code rate corresponding to the temporary modulation index code rate among modulation index code rates belonging to the transmission_method_combination_PART. . 4. The method of claim 3, wherein the number of Walsh codes used for subpacket transmission is determined according to the corresponding modulation index code rate, the number of bits of the encoder packet, the number of slots to be used for the subpacket transmission, the number of chips, and the chip rate. The method for determining a subpacket transmission variable further comprising the step of determining. 4. The method of claim 3, wherein the number of Walsh codes determined according to the corresponding modulation index code rate, the number of bits of the encoder packet, the number of slots to be used for the subpacket transmission, the number of chips and the chip rate, and the transmission_method_ And determining, by the number of Walsh codes used for the subpacket transmission, a value of the smallest Walsh code number belonging to the combination_PART and associated with the number of bits of the encoder packet and the number of slots to be used for the subpacket transmission. How to determine the subpacket transmission variable. 4. The method of claim 3, wherein the corresponding modulation index code rate is: And determining the largest code rate among modulation index code rates that belong to the transmission_method_combination_part and not greater than the temporary modulation index code rate. 4. The method of claim 3, wherein the corresponding modulation index code rate is: If the temporary modulation index code rate is smaller than the minimum temporary modulation index code rate, it is determined to be the largest code rate among modulation index code rates that belong to the transmission_method_combination_PART and not greater than the temporary modulation index code rate. And when the temporal modulation index code rate is greater than or equal to the minimum temporal modulation index code rate, determined by the temporary modulation index code rate. 3. The method of claim 2, wherein the temporary modulation index code rate (MPR _{k, d, g} ) is determined by the following equation:

From here,

Is the number of bits of the encoder packet, X is a constant obtained using the number of chips and the chip rate, N _Walsh , _k is the number of Walsh codes currently available,

Is the number of slots to be used for the subpacket transmission. 4. The method of claim 3, further comprising the step of determining the number of Walsh codes (N ' _{Walsh, k} ) used for subpacket transmission by the following equation:

From here,

Is the number of bits in the encoder packet, X is a constant obtained using the number of chips and the chip rate, MPR ' _{k, d, g} is the corresponding modulation index code rate,

Is the number of slots to be used for the subpacket transmission. The method according to claim 3, wherein the number of Walsh codes (N ' _{Walsh, k} ) determined by the following equation and the transmission_method_combination_PART

In one case, the method for determining a subpacket transmission variable further includes determining a small value among the smallest Walsh codes used as the number of Walsh codes used for the subpacket transmission.

From here,

Is the number of bits in the encoder packet, X is a constant obtained using the number of chips and the chip rate, MPR ' _{k, d, g} is the corresponding modulation index code rate,

Is the number of slots to be used for the subpacket transmission. The subpacket according to claim 1, wherein the transmission_method_combination_PART is selected based on at least one S _{d, g} set selected from the group consisting of modulation rate sets 1 to 3. To determine transmission parameters: Modulation rate set 1

Modulation rate set 2

S _1,1 = {0.607, 1.175, 1.5, 1.8, 2.43, 2.688, 3.2}, S _1,1 = {0.607, 1.175, 1.5, 2.0, 2.52, 2.96, 3.2}, S _1,1 = {0.607, 1.175, 1.5, 2.0, 2.684, 3.2}, S _1,1 = {0.601, 1.175, 1.5, 2.0, 2.52, 2.96, 3.2} or S _1,1 = {0.41, 0.79, 1.10, 1.32, 1.50, 1.75, 1.95, 2.30, 2.58, 2.85, 3.10} Modulation rate set 3

,

,

,

,

, And

, Here, d is an index indicating the number of bits of the encoder packet, g is an index indicating the number of slots to be used for the subpacket transmission. 4. The method of claim 3, wherein if the modulation index is 3 or 4, the corresponding modulation index code rate is equal to the temporary modulation index code rate. The subpacket according to claim 1, wherein when the selected specific transmission scheme combination needs to be transmitted to the receiver through a packet data control channel, an index assigned to the transmission_method_combination_PART is transmitted. How to determine transmission variables. 4. The method of claim 3, further comprising the step of determining the number of Walsh codes (N ' _{Walsh, k} ) used for subpacket transmission by the following equation:

From here,

Is the number of bits of the encoder packet, MPR ' _{k, d, g} is the corresponding modulation index code rate,

Is the number of slots to be used for the subpacket transmission, Lmax is a predetermined constant, m _{k, d, g} is of the transmission_method_combination_ALL

In this case, the modulation index (m _k ). 15. The method of claim 14, wherein Lmax is 7728 or 11592. The method of claim 13, wherein the transmission_method_combination_PART is selected from a group consisting of the following Tables 1-8. Table 1

TABLE 2

TABLE 3

Table 4

Table 5

Table 6

TABLE 7

Table 8

14. The method of claim 13, wherein the index is determined through a slot length according to a transmission time length of the packet data control channel. delete delete delete delete delete delete delete delete delete delete delete delete delete delete 17. The method of claim 16, wherein '11110' or '11111' among the combination scheme indexes is used as an index for the base station to transition the current state of the terminal. 33. The method of claim 32, wherein the current state of the terminal is one of a 'control hold' or an 'active' state. delete 17. The method of claim 16, wherein, when all transmission method combinations corresponding to a specific transmission method combination index are configured as 'Reserved', the transmission method combinations belonging to the transmission method combination index are activated by the base station in a control hold state. Method for determining a subpacket transmission variable, characterized in that it is used to transition to a. delete delete delete delete delete The method of claim 1, wherein the transmission_method_combination_PART is composed of the following Tables 9a to 9d. Table 9a

Table 9b

Table 9c

Table 9d

delete

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