KR101147756B1 - Method for Transmitting and Receiving Information of Reverse Channel Frequency Allocation - Google Patents

Abstract

The present invention relates to a system for performing communication using at least one forward channel frequency and a reverse channel frequency, the first information indicating whether a reverse channel frequency is allocated in excess of the number of the forward channel frequencies, the frequency of the forward channel frequency. Second information indicating the number of reverse channel frequencies exceeding the number, for each reverse channel frequency exceeding the number of the forward channel frequencies, third information indicating an associated forward channel frequency and exceeding the number of the forward channel frequencies A method of transmitting reverse channel frequency information comprising the step of generating a control message comprising fourth information about a frequency of each reverse channel and transmitting the generated control message to a mobile station. Allocate two or more reverse channels involved In addition, there is an effect that can transmit the information on the allocated reverse channel.

Description

Method for Transmitting and Receiving Information of Reverse Channel Frequency Allocation}

1 is a diagram illustrating an example of a correspondence relationship between a forward channel frequency and a reverse channel frequency when the number of forward channel frequencies is five and the number of reverse channel frequencies is three.

2 is a diagram illustrating an example of a correspondence relationship between a forward channel frequency and a reverse channel frequency when the number of forward channel frequencies is 5 and the number of reverse channel frequencies is 5;

3 is a diagram illustrating an example of a correspondence relationship between a forward channel frequency and a reverse channel frequency when the number of forward channel frequencies is three and the number of reverse channel frequencies is five.

The present invention relates to a method for transmitting reverse channel allocation information, and more particularly, to a method for transmitting reverse channel allocation information when allocating two or more reverse channels related to one forward channel.

High Rage Packet Data (HRPD) is a standard of wireless access technology optimized for high speed and high capacity data transmission. The HRPD system transmits data to a mobile station by applying Code Division Multiple Access (CDMA) technology and Time Division Multiplexing (TDM) technology. Therefore, the HRPD system can provide rich multimedia contents in various fields such as wireless Internet access, real-time traffic information, wireless live broadcasting, movies, and games due to improved data transmission speed and capacity.

In an HRPD system, a base station transmission frequency is a frequency used for a forward channel, and a mobile station transmission frequency is used for a reverse channel. In general, the transmission frequency band of the mobile station is set lower than the base station transmission frequency band. In other words, the higher the frequency, the greater the attenuation, so that it does not reach far, and thus allocates a high frequency band to a base station that uses relatively large power.

In the 1x HRPD system, the transmission frequency of the mobile station is determined based on the transmission frequency of the base station. According to the CDMA channel number, when the base station transmission frequency is assigned, the frequency of the mobile station corresponding to the CDMA channel number is determined as the mobile station transmission frequency. That is, when the transmission frequency of the base station is determined, the transmission frequency of the mobile station is determined to be smaller by a certain offset than the transmission frequency of the base station. In this case, even if the base station does not separately transmit information about the transmission frequency of the mobile station, the transmission of the mobile station is performed. The frequency can be specified.

Table 1 shows an example of transmission frequencies of the base station and the mobile station according to the CDMA channel number in case of Band Class 0 (Cellular frequency).

Transmitter CDMA Channel Number Center frequency for
CDMA Channel (MHz) Mobile station 1 N 799 0.030 N + 825.000 991 N 1023 0.030 (N-1023) + 825.000 Base station 1 N 799 0.030 N + 870.000 991 N 1023 0.030 (N-1023) + 870.000

Referring to Table 1, when the CDMA channel number assigned to the base station is 1, the base station transmission frequency is 870.03 MHz and the transmission frequency of the mobile station is determined to be 825.03 MHz corresponding to the CDMA channel number 1.

As described above, the mobile station transmission frequency has a smaller value than the base station transmission frequency by a certain offset. In the example of Table 1, the constant offset is 45 MHz. The difference between the mobile station transmission frequency and the base station transmission frequency depends on the band class. For example, in the case of Band Class 4 (Korean PCS frequency), the difference is 90 MHz.

In order to increase data throughput in a mobile communication system, an Nx HRPD system that increases the forward bandwidth and the reverse bandwidth to an integer multiple of 1.25 MHz (1X) may be used. In the Nx HRPD system, a mobile station transmission frequency (reverse channel frequency) can be assigned regardless of the base station transmission frequency (forward channel frequency).

However, the traffic channel assignment message currently used has a structure in which only one reverse channel can be allocated per forward channel. Therefore, there is a problem that cannot support the case where the number of reverse channels associated with one forward channel frequency is two or more.

It is an object of the present invention to provide a reverse channel allocation method in a system in which a forward bandwidth and a reverse bandwidth correspond to multiples of a specific frequency.

In order to achieve the above object, the present invention provides a method for transmitting reverse channel frequency (Frequency Allocation) information applied to a system for communicating by using at least one forward channel frequency and reverse channel frequency, the number of forward channel frequencies. First information indicating whether a reverse channel frequency is allocated in excess, second information indicating a number of reverse channel frequencies exceeding the number of frequencies of the forward channel, and each reverse channel frequency exceeding the number of the forward channel frequencies. And generating a control message comprising third information indicative of an associated forward channel frequency and fourth information relating to a frequency of each reverse channel exceeding the number of forward channel frequencies and transmitting the generated control message to a mobile station. It comprises a step.

The present invention also relates to a first information part having information on forward channel frequency allocation and information on reverse channel frequencies preferentially associated with each forward channel frequency, and a reverse channel frequency additionally related to the forward channel frequency. Generating a channel assignment message comprising a second information part having information and transmitting the message to a mobile station.

The above-mentioned objects, features and advantages will become more apparent from the following detailed description in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the description of the present invention, the reverse channel and the forward channel mean reverse channel frequency (Frequency Allocation) and forward channel frequency.

In an Nx HRPD system, the reverse channel frequency may be determined to be a value having a constant offset from the forward channel frequency, or may be allocated independently regardless of the forward channel frequency. In addition, the base station may transmit information on how the forward channel frequency and the reverse channel frequency are determined through a specific message. In one example, a traffic channel assignment message may send information to the mobile station on how the forward channel frequency and the reverse channel frequency are determined. In particular, when the reverse channel frequency is allocated independently of the forward channel frequency, the Traffic Channel Assignment Message includes information in the reverse channel frequency.

Table 2 shows an example of a traffic channel assignment message.

NumForwardChannels 4

NumForwardChannels occurrences of the following ActiveSetParameters

record:

{

AssignedChannel 0 or 24

[...]

ReverseChannelConfiguration 2 Reversechannel 0 or 24

NumSectors occurrences of the following record:

{

[...]

MACIndex 0 or 8

}

}

As in the example of Table 2, the traffic channel assignment message transmitted from the base station includes information about the number of forward channels allocated to the mobile station ('NumForwardChannels' field), and a frequency allocated to each forward channel ('AssignedChannel'). 'Field) information and information on how the reverse channel frequency is determined (' ReverseChannelConfiguration 'field).

In the example of Table 2, if the value of the ReverseChannelConfiguration field is '00', it indicates that there is no reverse channel associated with the forward channel allocated by AssignedChannel. On the other hand, if the value of the ReverseChannelConfiguration field is '01', it indicates that there is a reverse channel associated with the forward channel allocated by the AssignedChannel, and the corresponding reverse channel frequency is determined as a value having a predetermined offset with the forward channel frequency. In addition, if the value of ReverseChannelConfiguration is '10', it indicates that there is a reverse channel associated with the forward channel allocated by the AssignedChannel, and that reverse channel frequency is independently allocated regardless of the forward channel frequency.

When the ReverseChannelConfiguration value is '10', the TrafficChannel Assignment Message has information ('ReverseChannel' field) regarding the frequency allocated to the reverse channel. Information about the reverse power control channel (the 'MACIndex' field) is omitted when the value of the ReverseChannelConfiguration field is '00' and is included when the value is '01' or '10'. The number of active sectors by the corresponding forward channel (NumSectors) Send as much.

1 is a diagram illustrating an example of a correspondence relationship between a forward channel and a reverse channel when the number of forward channels is 5 and the number of reverse channels is three. In the example of FIG. 1, the first reverse channel frequency RL_FA 1 is determined to be a value having a constant offset with the first forward channel frequency FL_FA 1. Meanwhile, although the second reverse channel and the third reverse channel are associated with the fourth forward channel and the fifth forward channel, the second reverse channel frequencies RL_FA 2 and the third reverse channel frequency RL_FA 3 are the fourth forward channel frequencies FL_FA 4 and 5 It is allocated independently of the forward channel frequency FL_FA 5 (Not Pair). Here, the association of the reverse channel A and the forward channel B means that the power control information of the reverse channel A is transmitted through the forward channel B.

Table 3 shows an example of a traffic channel assignment message for channel allocation as shown in FIG. 1 when the number of active sectors per forward channel is 1.

NumForwardChannels '0101' AssignedChannel 'FL_FA 1'

[...]

ReverseChannelConfiguration '01'

[...]

MACIndex MACIndex 1 AssignedChannel 'FL_FA 2'

[...]

ReverseChannelConfiguration '00'

[...]

AssignedChannel 'FL_FA 3'

[...]

ReverseChannelConfiguration '00'

[...]

AssignedChannel 'FL_FA 4'

[...]

ReverseChannelConfiguration '10' Reversechannel 'RL_FA 2'

[...]

MACIndex MACIndex 2 AssignedChannel 'FL_FA 5'

[...]

ReverseChannelConfiguration '10' Reversechannel 'RL_FA 3'

[...]

MACIndex MACIndex 3

In the example of Table 3, since the first reverse channel frequency RL_FA 1 is a frequency having a constant offset from the first forward channel frequency FL_FA 1 (Pair), the value of the ReverseChannelConfiguration field for the first forward channel is set to '01'. Thus, the ReverseChannel field for the first reverse channel is omitted and the MACIndex field is set to point to the reverse power control channel.

Meanwhile, since there is no reverse channel associated with the second forward channel and the third forward channel, the value of the ReverseChannelConfiguration field for the second forward channel and the third forward channel is set to '00', and the ReverseChannel field and the MACIndex field are omitted. .

The second reverse channel is associated with the fourth forward channel but the frequency is determined independently (Not Pair). Since the second reverse channel frequency RL_FA 2 is determined independently of the associated fourth forward channel frequency FL_FA 4, the ReverseChannelConfiguration field value for the fourth forward channel is set to '10' and the ReverseChannel field is assigned the second reverse channel frequency value. It is set to (RL_FA 2). Meanwhile, the MACIndex field is set to indicate the reverse power control channel.

Meanwhile, the third reverse channel is also related to the fifth forward channel, but the frequency is determined independently (Not Pair). Since the reverse channel frequency RL_FA 3 is determined independently of the forward channel frequency FL_FA 4, the ReverseChannelConfiguration field value for the fifth forward channel is set to '10' and the ReverseChannel field is assigned to the assigned third reverse channel frequency value (RL_FA 3). Is set. Meanwhile, the MACIndex field is set to indicate the reverse power control channel.

2 is a diagram illustrating an example of a correspondence relationship between a forward channel and a reverse channel when the number of forward channels is 5 and the number of reverse channels is 5. In the example of FIG. 2, the first reverse channel frequency RL_FA 1, the second reverse channel frequency RL_FA 2, and the fifth reverse channel frequency RL_FA 5 are associated with the first forward channel frequency FL_FA 1, the second forward channel frequency FL_FA 2, and the second, respectively. 5 is determined to have a constant offset with the forward channel frequency FL_FA 5 (Pair), and the third reverse channel frequency RL_FA 3 and the fourth reverse channel frequency RL_FA 4 are related to the third forward channel frequency FL_FA 3 and the fourth forward channel frequency. It is allocated independently regardless of FL_FA 4 (Not Pair).

Table 4 shows an example of a traffic channel allocation message for channel allocation as shown in FIG. 2 when the number of active sectors per forward channel is 1.

NumForwardChannels '0101' AssignedChannel 'FL_FA 1'

[...]

ReverseChannelConfiguration '01'

[...]

MACIndex MACIndex 1 AssignedChannel 'FL_FA 2'

[...]

ReverseChannelConfiguration '01'

[...]

MACIndex MACIndex 2 AssignedChannel 'FL_FA 3'

[...]

ReverseChannelConfiguration '10' Reversechannel 'RL_FA 3'

[...]

MACIndex MACIndex 3 AssignedChannel 'FL_FA 4'

[...]

ReverseChannelConfiguration '10' Reversechannel 'RL_FA 4'

[...]

MACIndex MACIndex 4 AssignedChannel 'FL_FA 5'

[...]

ReverseChannelConfiguration '01'

[...]

MACIndex MACIndex 5

In the example of Table 4, the first reverse channel frequency RL_FA 1, the second reverse channel frequency RL_FA 2 and the fifth reverse channel frequency RL_FA 5 are associated with the first forward channel frequency FL_FA 1, the second forward channel frequency FL_FA 2 and the fifth forward channel. Since it is determined as a frequency having a constant offset value from the channel frequency FL_FA 5 (Pair), the value of the ReverseChannelConfiguration field for the first forward channel, the second forward channel, and the fifth forward channel is set to '01'. In this case, since the reverse channel frequency is determined by an associated forward channel frequency and an offset value, it is not necessary to separately inform the first reverse channel frequency RL_FA 1, the second reverse channel frequency RL_FA 2, and the fifth reverse channel frequency RL_FA 5. Thus, the ReverseChannel fields for the first forward channel, the second forward channel, and the fifth forward channel are omitted, and the MACIndex field is set to point to the reverse power control channel.

Meanwhile, since the third reverse channel frequency and the fourth reverse channel frequency are determined independently of the third forward channel frequency FL_FA 3 and the fourth forward channel frequency FL_FA 4, the value of the ReverseChannelConfiguration field for the third forward channel and the fourth forward channel is It is set to '10', the ReverseChannel field is set to the associated reverse channel frequency values (RL_FA 3, RL_FA 4), respectively. Meanwhile, the MACIndex field is set to indicate the reverse power control channel.

When using the TrafficChannelAssignment Message format according to Table 2, the supportable reverse channels cannot exceed the number of allocated forward channels. Therefore, in order to support a larger number of reverse channels than the number of allocated forward channels, it is necessary to change the format of the TrafficChannelAssignment Message.

Table 5 shows an example of a traffic channel assignment message.

NumForwardChannels 4

NumForwardChannels occurrences of the following ActiveSetParameters

record:

{

AssignedChannel 0 or 24

[...]

ReverseChannelConfiguration 2 Reversechannel 0 or 24

[...]

NumSectors occurrences of the following record:

{

MACIndex 0 or 8

}

}

AdditionalReverseChannelIncluded One ReverseChannelCount 0 or 4

ReverseChannelCount occurrences of the following record (starting from

ReverseChannel field and ending at PowerControlMACIndex field,

inclusive):

Reversechannel 24 ForwardChannelIndex 4

NumSectors occurrences of the following field:

MACIndex 8

In the traffic channel message (TrafficChannelAssignment Message) according to Table 5, if the number of reverse channels does not exceed the number of forward channels, the traffic channel message (TrafficChannelAssignment Message) format shown in Table 2 can be maintained. However, when the number of reverse channels exceeds the number of forward channels, the following fields are added to the Traffic Channel Message shown in Table 2, as in the example of Table 5.

In the example of Table 5, the AdditionalReverseChannelIncluded field indicates whether the number of reverse channels exceeds the number of forward channels. That is, if the number of reverse channels exceeds the number of forward channels, the AdditionalReverseChannelIncluded field is set to '1', otherwise it is set to '0'. Therefore, when the value of the AdditionalReverseChannelIncluded field is '0', fields added below the AdditionalReverseChannelIncluded field may be omitted.

The ReverseChannelCount field indicates how many reverse channels are allocated in excess of the number of reverse channels associated with the forward channel. For example, if the number of forward channels is 4 and the number of reverse channels is 6, if four reverse channels are associated with the forward channel and two reverse channels remain, the ReverseChannelCount field has a value of '0010'.

For the remaining reverse channel, information about channel frequency assignment and associated forward channel is needed. Therefore, for each remaining reverse channel, a ReverseChannel field indicating the frequency of the reverse channel and a ForwardChannelIndex indicating the related forward channel are added. MACIndex indicates a reverse power control channel corresponding to the frequency.

3 is a diagram illustrating an example of a correspondence relationship between a forward channel and a reverse channel when the number of forward channels is 3 and the number of reverse channels is five. In the example of FIG. 3, the first reverse channel frequency RL_FA 1 and the second reverse channel frequency RL_FA 2 are respectively determined as values having a constant offset with the forward channel frequencies FL_FA 1 and FL_FA 2. Meanwhile, the third reverse channel frequency RL_FA 3, the fourth reverse channel frequency RL_FA 4, and the fifth reverse channel frequency RL_FA 5 are independently determined regardless of the forward channel frequency.

Table 6 shows an example of a traffic channel allocation message for channel allocation as shown in FIG. 3 when the number of active sectors per forward channel is 1.

NumForwardChannels '0101' AssignedChannel 'FL_FA 1'

[...]

ReverseChannelConfiguration '01'

[...]

MACIndex MACIndex 1 AssignedChannel 'FL_FA 2'

[...]

ReverseChannelConfiguration '01'

[...]

MACIndex MACIndex 2 AssignedChannel 'FL_FA 3'

[...]

ReverseChannelConfiguration '10' Reversechannel 'RL_FA 4'

[...]

MACIndex MACIndex 3 AdditionalReverseChannelIncluded 'One' ReverseChannelCount '0010' Reversechannel 'RL_FA 3' ForwardChannelIndex '0010' MACIndex MACIndex 4 Reversechannel 'RL_FA 5' ForwardChannelIndex '0011' MACIndex MACIndex 5

In the example of FIG. 3, the first reverse channel frequency RL_FA 1 is determined as a value having a constant offset with the first forward channel frequency FL_FA 1, and the second reverse channel frequency RL_FA 2 is determined as the second forward channel frequency FL_FA 2. It is determined as a value having a certain offset (Pair). Thus, in the example of Table 6, the ReverseChannelConfiguration field for the first forward channel frequency and the second forward channel is set to '01' and the ReverseChannel field is omitted. On the other hand, the MACIndex field is set to point to the reverse power control channel, respectively.

On the other hand, the fourth reverse channel is associated with the third forward channel, but since the fourth reverse channel frequency RL_FA 4 is independently allocated regardless of the third forward channel frequency FL_FA 3 (Not Pair), the ReverseChannelConfiguration for the third forward channel frequency Is set to '10' and the ReverseChannel field is set to the fourth reverse channel frequency RL_FA 4. Meanwhile, the MACIndex field is set to indicate the reverse power control channel.

In the example of FIG. 3, the AdditionalReverseChannelIncluded field value is set to '1' to transmit information about the third reverse channel and the fifth reverse channel. Meanwhile, in the example of FIG. 3, since the number of forward channels is 3, the number of reverse channels is 5, three reverse channels are associated with the forward channel, and two reverse channels remain, the ReverseChannelCount field value is set to '0010'. Set it.

In addition, the following fields are added to transmit information on the third reverse channel and the fifth reverse channel. That is, in order to transmit frequency information allocated to the third reverse channel, the third reverse channel frequency RL_FA 3 is set in the ReverseChannel field, and the second forward channel with the forward channel index associated with the third reverse channel frequency in the ForwardChannelIndex field. Set the value '0010' to indicate. And, the MACIndex field is set to indicate the reverse power control channel.

Meanwhile, in order to transmit frequency information allocated to a fifth reverse channel, a fifth reverse channel frequency RL_FA 5 is set in a ReverChannel field, and a third forward channel with a forward channel index associated with the fifth reverse channel frequency in a ForwardChannelIndex field. Set the '0011' value. And, the MACIndex field is set to indicate the reverse power control channel.

The traffic channel assignment message may be applied even when two or more reverse channels are related to one forward channel. In this case, one of two reverse channels related to one forward channel may be defined above the AdditionalReverseChannelIncluded field, and the other may be defined according to the method shown in Table 5 below the AdditionalReverseChannelIncluded field.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

The present invention has the effect of allocating two or more reverse channels associated with one forward channel and transmitting information about the assigned reverse channel.

Claims (15)

A method for transmitting reverse channel frequency (Frequency Allocation) information applied to a system for communicating by using at least one forward channel frequency and reverse channel frequency, First information indicating whether a reverse channel frequency is allocated in excess of the number of forward channel frequencies, second information indicating the number of reverse channel frequencies in excess of the number of frequencies in the forward channel, and exceeding the number of forward channel frequencies For each reverse channel frequency, generating a control message comprising third information indicating an associated forward channel frequency and fourth information relating to a frequency of each reverse channel exceeding the number of the forward channel frequencies; And Transmitting the generated control message to a mobile station Reverse channel frequency information transmission method comprising a. The method of claim 1, And the control message further includes fifth information indicating reverse power control channel information for each reverse channel frequency exceeding the number of the forward channel frequencies. The method of claim 1, And sixth information indicating a frequency allocation scheme for each reverse channel frequency not exceeding the number of forward channel frequencies. The method of claim 3, wherein The frequency allocation method is a method of transmitting the reverse channel frequency information, characterized in that determined in accordance with the forward channel frequency and a certain offset (offset) associated with the reverse channel frequency. The method of claim 3, wherein The frequency allocation method, the reverse channel frequency information transmission method, characterized in that for assigning the reverse channel frequency independently of the forward channel frequency associated with the reverse channel. The method of claim 1, The control message is a traffic channel assignment message (TrafficChannelAssignment Message) characterized in that the reverse channel frequency information transmission method. The method of claim 1, The communication system is a high rate packet data (HRPD) system, characterized in that the reverse channel frequency information transmission method. A first information part having information on forward channel frequency allocation and information on reverse channel frequencies preferentially associated with the respective forward channel frequencies, and a second having information on reverse channel frequencies additionally related to the forward channel frequencies. Generating a channel assignment message comprising an information part; And Sending the message to a mobile station, And said second information part comprises a field relating to whether there is a reverse channel frequency additionally related to at least one forward channel frequency. The method of claim 8, In the first information part, the number of reverse channel frequencies associated with one forward channel frequency is equal to or less than one. The method of claim 8, The first information part includes a field relating to the number of forward channel frequencies, a field relating to each assigned forward channel frequency, and a field relating to a reverse channel frequency allocation scheme related to each forward channel frequency. Frequency information transmission method. delete The method of claim 11, According to a field value relating to whether there is a reverse channel frequency additionally related to each forward channel frequency, the second information part includes a field relating to the number of reverse channel frequencies additionally related to a forward channel frequency, the forward channel. And a field indicating a field for each reverse channel frequency additionally associated with a frequency and a field indicating an index of a forward channel frequency additionally associated with the reverse channel. A first information part having information on a forward channel frequency and information on a reverse channel frequency preferentially related to each forward channel frequency, and a second information part having information on a reverse channel frequency additionally related to the forward channel frequency. Receiving a channel assignment message comprising a; And Transmitting data using a reverse channel frequency according to the information included in the message, And wherein said second information part comprises a field relating to whether there is a reverse channel frequency additionally related to at least one forward channel frequency. delete The method of claim 14, According to a field value relating to whether there is a reverse channel additionally associated with each forward channel frequency, the second information part includes a field relating to the number of reverse channel frequencies additionally related to a forward channel frequency, and the forward channel. And a field indicating a frequency of each additionally related reverse channel frequency and a field indicating an index of a forward channel frequency additionally associated with the reverse channel.

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