KR101071825B1 - Method of Generating PLCM for Broadcast/Multicast Service - Google Patents

Abstract

The present invention provides a broadcast / multicast service (BCMCS), comprising: receiving a service identifier for identifying each broadcast / multicast service and using a public long code mask (BCMCS) using the service identifier; The present invention relates to a public long code mask generation method comprising generating a public long code mask (PLCM), and using a broadcast / multicast service identifier, a forward-broadcast fundmental channel (F-). By creating a public long code mask to be used for the BFCH) and the Forward-Broadcast Supplemental Channel (F-BSCH), the overhead of forward transmission can be reduced by eliminating the need for the base station to inform the terminal of the PLCM to use. There is.

Broadcast / multicast service, public long code mask

Description

Method of Generating Public Long Code for Broadcast and Multicast Service {Method of Generating PLCM for Broadcast / Multicast Service}

1 is a diagram illustrating an exemplary long code generation method.

2 is a diagram illustrating an embodiment of a PLCM generation method used for F-BFCH in accordance with the present invention;

3 is a diagram illustrating an embodiment of a method for generating a PLCM used for an F-BSCH according to the present invention;

4 is a diagram illustrating an embodiment of a method for generating a PLCM using any one of the broadcast / multicast identifiers assigned to F-BSCHs according to the present invention.

FIG. 5 is an explanatory diagram illustrating a method of generating a PLCM using FSCH_ID when one broadcast / multicast service data is separated and transmitted into several F-BSCHs according to the present invention; FIG.

6 is an explanatory diagram of a first embodiment showing a method of generating a PLCM using FSCH_ID according to the present invention;

7 is an explanatory diagram of a second embodiment showing a method of generating a PLCM using FSCH_ID according to the present invention;

8 is an explanatory diagram of a third embodiment showing a method of generating a PLCM using FSCH_ID according to the present invention;

9 is an explanatory diagram of a fourth embodiment showing a method of generating a PLCM using FSCH_ID according to the present invention;

10 is an explanatory diagram of a fifth embodiment showing a method of generating a PLCM using FSCH_ID according to the present invention;

11 is an explanatory diagram of a sixth embodiment showing a method of generating a PLCM using FSCH_ID according to the present invention;

FIG. 12 is an explanatory diagram illustrating a method of generating a PLCM using BSR_ID when one broadcast / multicast service data is transmitted separately in several F-BSCHs according to the present invention; FIG.

FIG. 13 is an explanatory diagram illustrating a method of generating a PLCM using BSR_ID and FSCH_ID when one broadcast / multicast service data is transmitted separately in multiple F-BSCHs according to the present invention; FIG.

The present invention relates to a method for generating a public long code mask applied to mobile communication, and more particularly, to a method for generating a public long code mask applied to a broadcast / multicast service (BCMCS).

Long code is used to encrypt the channel in the forward channel and to locate the power control bits. On the other hand, it distinguishes each terminal in the reverse channel, and serves to reduce interference with signals transmitted from other subscriber stations.

1 is a diagram illustrating an exemplary long code generation method. As shown in FIG. 1, the long code 13 is generated in the long code generator 12 according to the long code mask 11, and generally has a length of 42 bits. The generated long code 13 performs a role as a long code by performing a transmission signal 14 and a modulo-2 inner product operation 15.

In order to perform a broadcast / multicast service (BCMCS) in a CDMA2000 system, a method of allocating a public long code mask (PLCM) based on each user, and broadcasting There is a way to allocate PLCM based on multicast services, the latter being more efficient. In other words, it is more efficient to allocate one PLCM to each group of users who use the broadcast / multicast service rather than to allocate a PLCM to each user.

On the other hand, even in the physical channel, it is efficient to allocate one channel for each service based on the broadcast / multicast service and to share the same with multiple users.

In the presently proposed system, a channel to be used for broadcast / multicast service includes a forward-broadcast fundmental channel (F-BFCH) and a forward-broadcast supplemental channel; Hereinafter, 'F-BSCH' has been proposed. The former is a method of sharing a forward-fundamental channel (hereinafter, referred to as 'F-FCH'), and the latter is a method of sharing a forward-supplemental channel (hereinafter, referred to as 'F-FCH').

The two methods differ as to which physical channel to share. However, the same is true in that one channel is allocated to one broadcast / multicast service so that a user group having the same Walsh code and the same PLCM is shared for the service.

Accordingly, an identifier BCMCS_FLOW_ID for each service is defined for each broadcast / multicast service, and one channel and one PLCM are allocated according to the identifier. The generated service identifier (BCMCS_FLOW_ID) is transmitted from the base station to the mobile station. For services having different service identifiers (BCMCS_FLOW_ID), the Walsh codes used for the channels and the PLCM are different.

PLCM used for the F-BFCH and the F-BSCH includes the existing forward / reverse-fundamental channel (hereinafter, "F / R-FCH") and forward / reverse-supplemental channel; A new PLCM different from the PLCM of each user used for "F / R-SCH" hereafter needs to be defined.

In order for the base station to allocate such a PLCM, a PLCM that does not overlap with the PLCM currently being used by the base station controller or the anchor base station controller above the base station must be allocated. There is a problem that can cause delays.

 The present invention has been proposed to solve the above problems, and in the broadcast / multicast service (BCMCS), the F-BFCH and the F-BSCH using the broadcast / multicast service identifier An object of the present invention is to provide a method for generating a public long code mask.

The present invention for achieving the above object in the method for generating a public long code mask (PLCM) for the broadcast / multicast service (BCMCS) in mobile communication, each broadcast Receiving a service identifier for identifying a cast / multicast service and generating a public long code mask using the service identifier.

In addition, the present invention is a public long code mask (Public Long Code Mask) applied to the case where two or more Broadcast / Multicast Service (BCMCS) data flows are transmitted multiplexed on one forward channel; A method for generating a PLCM, comprising: receiving a service identifier for identifying each broadcast / multicast service, selecting one of the service identifiers for the two or more broadcast / multicast services, and the selected service identifier Generating a public long code mask by using;

Meanwhile, in the present invention, one broadcast / multicast service (BCMCS) data flow is separated and transmitted through two or more forward-broadcast supplemental channels ('F-BSCH'). In the public long code mask (PLCM) generation method applied to the case, the method comprising: receiving a service identifier for identifying each broadcast / multicast service and adding the service identifier and the forward broadcast Generating a public long code mask using all or part of the channel identifier for identifying the channel.

In addition, the present invention provides that one broadcast / multicast service (BCMCS) data flow is separated and transmitted through two or more forward-broadcast supplemental channels ('F-BSCH'). A method of generating a public long code mask (PLCM) applied to a case, the method comprising: receiving a service identifier for identifying each broadcast / multicast service and the service identifier and any forward broadcast additional channel And generating a public long code mask using a service flow identifier for identifying which broadcast / multicast service flows are transmitted over the network.

In the present invention, one broadcast / multicast service (BCMCS) data flow is separated and transmitted through two or more forward-broadcast supplemental channels ('F-BSCH'). A method of generating a public long code mask (PLCM) applied to a case, the method comprising: receiving a service identifier for identifying each broadcast / multicast service and for identifying the forward broadcast additional channel. And generating a public long code mask using a channel flow identifier and a service flow identifier for identifying which broadcast / multicast service flows are sent on which forward broadcast side channels.

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 each embodiment of the present invention, the technical idea of the present invention will be described in detail on the assumption that the PLCM is 42 bits.

2 is a diagram illustrating an embodiment of a PLCM generation method used for an F-BFCH according to the present invention. In the PLCM generation method according to the present embodiment, first, a value that is not duplicated with all existing PLCMs and Long Code Masks (LCM) as a header is assigned to the upper 10 bits. As an example, as shown in FIG. 2, when the upper 10 bits are allocated as '1100010000', there is no overlap with any existing PLCM and LCM.

In the same manner as above, the upper 10 bits are allocated, and the lower 32 bits are allocated the broadcast / multicast service identifier (BCMCS_FLOW_ID). The length of the broadcast / multicast service identifier may be one of 16 bits, 24 bits, and 32 bits. If the broadcast / multicast service identifier is smaller than 32 bits, the broadcast / multicast service identifier is allocated to the lower part of the predetermined 32 bits, and the remaining part is padded with '0' or '1'. Can be.

3 is a diagram illustrating an embodiment of a PLCM generation method used for an F-BSCH according to the present invention. Referring to FIG. 3, in the method of generating a PLCM according to the present embodiment, first, a value that does not overlap with all existing PLCMs and LCMs is allocated to upper 10 bits. For example, as shown in FIG. 3, when the upper 10 bits are allocated to '1100010001', there is no overlap with any existing PLCM and LCM.

In the same manner as above, the upper 10 bits are allocated, and the lower 32 bits are allocated the broadcast / multicast service identifier (BCMCS_FLOW_ID). The length of the broadcast / multicast service identifier may be one of 16 bits, 24 bits, and 32 bits. If the broadcast / multicast service identifier is less than 32 bits, the broadcast / multicast service identifier is allocated to the lower part of the predetermined lower 32 bits, and the remaining part is padded with '0' or '1'. Can be.

4 is a diagram illustrating an embodiment of generating a PLCM using any one of broadcast / multicast identifiers allocated to F-BSCHs according to the present invention. When two or more Broadcast / Multicast Service (BCMCS) data are multiplexed and transmitted in one F-BSCH, several broadcast / multicast services are generated when generating PLCM for the corresponding F-BSCH. Any one of the identifiers BCMCS_FLOW_ID may be selected and used. For example, as shown in FIG. 4, the first broadcast / multicast identifier (FIRST_FLOW_ID) allocated to the corresponding F-BSCH may be used.                     

When one broadcast / multicast service data is divided and transmitted to several F-BSCHs, an additional identifier is required in addition to the broadcast / multicast service identifier (BCMCS_FLOW_ID) in generating PLCM.

FIG. 5 is an explanatory diagram illustrating a method of generating a PLCM using FSCH_ID when one broadcast / multicast service data is separated and transmitted into several F-BSCHs according to the present invention. As shown in FIG. 5, in generating a PLCM, an FSCH_ID, which is an identifier indicating which F-BSCH, may be generated from among F-BSCHs. In order for the FSCH_ID to be used for generating the PLCM, it is necessary to change the PLCM configuration shown in FIGS. 3 and 4.

The specific configuration of the PLCM illustrated in FIG. 5 may vary depending on the length of the FSCH_ID and the length of the header HEADER. The FSCH_ID is originally 7 bits. If the FSCH_ID is determined to be too long for PLCM generation using the entire FSCH_ID, the FSCH_ID can be used by reducing the length (number of bits) of the FSCH_ID.

6 is an explanatory diagram of a first embodiment showing a method of generating PLCM using FSCH_ID according to the present invention. As shown in FIG. 6, in generating the PLCM of the type shown in FIG. 5, the broadcast / multicast service identifier (BCMCS_FLOW_ID) may have a length of 32, 24, and 16 bits, and a 3-bit FSCH_ID. Can be used. Here, when the broadcast / multicast service identifier (BCMCS_FLOW_ID) has a length of 24 bits or 16 bits, a specific portion may be padded with '0' or '1'.                     

In the present embodiment, only the most significant 3 bits (LSB_3) of the Least Significant Bit (LSB) of the FSCH_ID are used, and '1100011', which has been used previously, is used as the header HEADER. Meanwhile, to prevent collision with other channels, '1100001' or '1100010' may be used as a header.

FIG. 7 is an explanatory diagram of a second embodiment showing a method of generating a PLCM using FSCH_ID according to the present invention. FIG. As shown in FIG. 7, in generating the PLCM of the type shown in FIG. 5, the broadcast / multicast service identifier BCMCS_FLOW_ID may have lengths of 32, 24, and 16 bits, and a 4-bit FSCH_ID. Can be used. Here, when the broadcast / multicast service identifier (BCMCS_FLOW_ID) has a length of 24 bits or 16 bits, a specific portion may be padded with '0' or '1'.

In this embodiment, only the most significant 4 bits (LSB 4 bits) FSCH_ID (FSCH_ID_LSB_4) of the FSCH_ID are used, and '110001', which has been used previously, is used as the header HEADER. On the other hand, as a header, '00xxxx' may be used to prevent collision with other channels. x is '0' or '1'.

8 is an explanatory diagram of a third embodiment showing a method of generating a PLCM using FSCH_ID according to the present invention. As shown in FIG. 8, in generating the PLCM of the type shown in FIG. 5, the broadcast / multicast service identifier (BCMCS_FLOW_ID) may have a length of 32, 24, and 16 bits, and a 7-bit FSCH_ID. Can be used. Here, when the broadcast / multicast service identifier (BCMCS_FLOW_ID) has a length of 24 bits or 16 bits, a specific portion may be padded with '0' or '1'.

In this embodiment, the entire FSCH_ID is used, and '110', which has been used previously, is used as a header. Meanwhile, in order to prevent collision with other channels, '000' or '001' may be used as a header. 6 to 8, FIRST_FLOW_ID indicates the first BCMCS_FLOW_ID assigned to the corresponding F-BSCH.

Meanwhile, since the BCMCS_FLOW_ID may have a length of 16 bits, 24 bits, or 32 bits, when the BCMCS_FLOW_ID is smaller than 32 bits, some of the 32 bits of FIRST_FLOW_ID shown in FIG. 5 are filled with the first BCMCS_FLOW_ID and the remaining portions are '0' or Can be padded with '1'.

9 is an explanatory diagram of a fourth embodiment showing a method of generating a PLCM using FSCH_ID according to the present invention. In generating the PLCM of the type described in FIG. 5, when the BCMCS_FLOW_ID has a length of 24 bits or 16 bits in addition to the 32 bits length, the PLCM may be generated by padding a predetermined portion.

As shown in FIG. 9, when the BCMCS_FLOW_ID has a length of 16 bits, the FSCH_ID has a length of 7 bits, and the header has a length of 7 bits, in order to fit the 42 bits of PLCM in length, It can be padded with '0' or '1'.

Referring to FIG. 9, the upper bits of the 16-bit BCMCS_FLOW_ID may be padded with '0' or '1' until the header. Meanwhile, although FIG. 9 used '1100011' as a header, '1100001' or '1100010' may also be used as a header.

10 is an explanatory diagram of a fifth embodiment showing a method of generating a PLCM using FSCH_ID according to the present invention. As shown in FIG. 10, when the BCMCS_FLOW_ID has a length of 24 bits, the FSCH_ID has a length of 7 bits, and the header has a length of 7 bits, in order to fit the 42 bits of the PLCM in length, It can be padded with '0' or '1'.

Referring to FIG. 10, the upper bits of the 16-bit BCMCS_FLOW_ID may be padded with '0' or '1' until the header. Meanwhile, although FIG. 10 used '1100011' as a header, '1100001' or '1100010' may also be used as a header.

11 is an explanatory view of a sixth embodiment showing a method of generating a PLCM using FSCH_ID according to the present invention. As shown in FIG. 11, when the BCMCS_FLOW_ID has a length of 32 bits and the FSCH_ID has a length of 7 bits, a header having a length of 3 bits can be used to match the 42 bits of the PLCM. have. As shown in FIG. 11, '110' may be used as a 3-bit header, while '000' and '001' may also be used as a 3-bit header.

FIG. 12 is an explanatory diagram illustrating a method of generating a PLCM using BSR_ID when one broadcast / multicast service data is separated and transmitted into several F-BSCHs according to the present invention.

As shown in FIG. 12, in generating the PLCM, a BSR_ID for identifying which BCMCS flow among BCMCS flows transmitted through the F-BSCH may be generated. In this case, a BSR_ID (FIRST_BSR_ID) corresponding to the first broadcast / multicast service identifier (BCMCS_FLOW_ID) may be used. On the other hand, even in this case, BMCS_FLOW_ID can be FIRST_FLOW_ID.

In order for BSR_ID to be used for PLCM generation, it is necessary to change the PLCM configuration shown in FIGS. 3 and 4 as shown in FIG. In FIG. 12, a header '1100011' is a value used in an existing channel. Instead, '1100001' or '1100010' may be used to prevent collision with other channels.

On the other hand, since BMCS_FLOW_ID can be 32 bits, 24 bits, or 16 bits in length, when the BMCS_FLOW_ID is smaller than 32 bits, a specific part can be padded with '0' or '1' to match the 42 bits of PLCM. have. That is, the upper bits of the BCMCS_FLOW_ID may be padded with '0' or '1' until the header. Meanwhile, although FIG. 12 used '1100011' as a header, '1100001' or '1100010' may also be used as a header.

FIG. 13 is an explanatory diagram illustrating a method of generating a PLCM using BSR_ID and FSCH_ID when one broadcast / multicast service data is separated and transmitted into several F-BSCHs according to the present invention.

As shown in FIG. 13, in generating the PLCM, an FSCH_ID which is a delimiter indicating which F-BSCH among F-BSCHs and a BSR_ID for identifying which BCMCS flows among BCMCS flows transmitted through the F-BSCH are included. Can be generated. In this case, the BSR_ID may use a BSR_ID (FIRST_BSR_ID) corresponding to the first BCMCS_FLOW_ID allocated to the corresponding F-BSCH.

Meanwhile, according to the length of the header HEADER, in order to fit 42 bits in length of the PLCM, a specific portion may be padded with '0' or '1'. That is, the upper bits of the FSCH_ID may be padded with '0' or '1' until the header. That is, the length of the padding is determined according to the length of the header. If the length of the header is n, the length of the padding is (32-n), and the padding is '0' or '1' as much as the length from the upper bits of the FSCH_ID to the header. Done.

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.

Since the present invention generates a PLCM using a known broadcast / multicast service identifier, it is possible to easily allocate a PLCM that does not overlap with the currently used PLCM, and uses a broadcast / multicast service identifier known in advance. Creating a PLCM has the effect of reducing delay.

Claims (42)

In mobile communication, a method of simultaneously receiving one broadcast / multicast service (BCMCS) through a plurality of forward-broadcast supplemental channels (“F-BSCH”) , The method, Receiving, at a mobile terminal, a service identifier identifying the broadcast / multicast service; And In the mobile terminal, the received service identifier, a part of a channel identifier for identifying a corresponding forward broadcast additional channel among the plurality of forward broadcast additional channels, and an existing public long code mask and long code mask. Generating a public long code mask that includes a specific header having a value that does not match LCM), The specific header is assigned to the most significant bit (MSB) bit portion of the public long code, Wherein the channel identifier and the service identifier are arranged in a higher bit direction from a least significant bit (LSB) to a portion of the public long code mask to which the particular header is not assigned. How to receive broadcast / multicast service. The method of claim 1, The public long code mask has a length of 42 bits, How to receive broadcast / multicast service. The method of claim 1, The service identifier has a length of 32 bits, How to receive broadcast / multicast service. The method of claim 1, The channel identifier has a maximum length of 7 bits, How to receive broadcast / multicast service. 5. The method of claim 4, A portion of the channel identifier is the least significant 4 bits of the channel identifier How to receive broadcast / multicast service. 5. The method of claim 4, A portion of the channel identifier is the least significant 3 bits of the channel identifier How to receive broadcast / multicast service. The method of claim 1, The length of the header varies according to the length of the channel identifier, How to receive broadcast / multicast service. The method of claim 1, The length of the header has a length of 10-n bits when a part of the channel identifier is the most significant n bits. How to receive broadcast / multicast service. (Where n <7) The method of claim 1, The specific header has a length of 7 bits, wherein the 7-bit header is one of '1100001', '1100010' and '1100011', How to receive broadcast / multicast service. The method of claim 1, The specific header has a length of 6 bits, and the specific header is one of '110001' or '00xxxx'. How to receive broadcast / multicast service. The method of claim 1, If the channel identifier includes a 7-bit length, the specific header is selected from the group consisting of '110', '000' and '001', How to receive broadcast / multicast service. The method of claim 1, If the service identifier has a length less than 32 bits, padded with 0 or 1 from the upper bits of the service identifier to the header, How to receive broadcast / multicast service. The method of claim 12, If the service identifier has a length of 16 bits and the header has a length of 7 bits, the upper 12 bits of the service identifier adjacent to the header are padded with 0 or 1, How to receive broadcast / multicast service. The method of claim 12, If the service identifier has a length of 24 bits and the header has a length of 7 bits, the upper 4 bits of the service identifier adjacent to the header are padded with 0 or 1, How to receive broadcast / multicast service. The method of claim 12, If the service identifier has a length of 32 bits and the header has a length of 3 bits, the service identifier is not padded. How to receive broadcast / multicast service. In a mobile communication, a mobile terminal that simultaneously receives one broadcast / multicast service (BCMCS) through a plurality of forward-broadcast supplemental channels (“F-BSCH”) mobile terminal) A first module for receiving and storing a service identifier for a broadcast / multicast service (BCMCS); A part of a channel identifier for identifying a corresponding forward broadcast additional channel among the received service identifier, the plurality of forward-broadcast supplemental channels (F-BSCHs), and an existing public long code mask And a second module for generating a public long code mask (PLCM) including a specific header having a value that does not match a long code mask (LCM). The specific header is assigned to the most significant bit (MSB) bit portion of the public long code, Wherein the channel identifier and the service identifier are arranged in a higher bit direction from a least significant bit (LSB) to a portion of the public long code mask to which the particular header is not assigned. Mobile terminal. The method of claim 16, The length of the header varies with the length of the channel identifier. Mobile terminal. The method of claim 16, The length of the header has a length of 10-n bits when a part of the channel identifier is the most significant n bits. Mobile terminal. (Where n <7) The method of claim 16, The specific header has a length of 7 bits, wherein the 7-bit header is one of '1100001', '1100010' and '1100011', Mobile terminal. The method of claim 16, If the channel identifier includes a length of 7 bits, the specific header is selected from the group consisting of '110', '000' and '001', Mobile terminal. delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete delete

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