WO2010101388A2

WO2010101388A2 - Method and apparatus for supporting multi-carrier allocation

Info

Publication number: WO2010101388A2
Application number: PCT/KR2010/001290
Authority: WO
Inventors: 이경환; 허예랑; 송국진
Original assignee: 주식회사 포스코아이씨티
Priority date: 2009-03-02
Filing date: 2010-03-02
Publication date: 2010-09-10
Also published as: WO2010101388A3

Abstract

A method for supporting multi-carrier allocation according to one embodiment of the present invention comprises the steps of: generating an Assignment Advanced MAP IE (A-A-MAP IE) for multiple carriers in which burst allocation information of at least one secondary carrier is directly allocated to a primary carrier of an advanced mobile station (AMS), or information of an advanced MAP zone, containing allocation information of said at least one secondary carrier, is allocated to the primary carrier; and transmitting the A-A-MAP IE allocated to the primary carrier.

Description

Method and apparatus for supporting multicarrier allocation

The present invention relates to a wireless communication technology, and more particularly, to a method and apparatus for supporting multi-carrier allocation to support resource allocation for multi-carrier operation.

Due to the development of communication technology, the services provided by the mobile communication system have been gradually developed in various ways such as not only voice communication service but also packet data transmission / reception service and multimedia broadcasting service for transmitting a large amount of data.

Third generation communication services such as WCDMA, which are currently in service, can transmit and receive not only voice but also large-capacity video and data at high data rates. Development of 4G communication service is underway.

As a communication technology for the fourth generation communication service, standardization of communication technologies such as Long-Term Evolution Network (LTE) and IEEE802.16m are actively being performed.

Currently, standardization work for using a plurality of carriers is actively progressing. In particular, IEEE 802.16m communication technology is a multi-carrier as a new method for providing high data throughput and efficient load balancing. There is a discussion about a communication system.

The multi-carrier system, which is discussed in IEEE 802.16m, can transmit and receive data through at least two carriers, thereby enabling large-capacity, high-speed data transmission and reception compared to the conventional single-carrier method. There is an advantage. On the MS side, a wider bandwidth can be used depending on the situation, and on the BS side, more users can be accommodated.

This multi-carrier operation may consist of independently complete carriers, including all control channels. Here, AMS (Advanced Mobile Station) is controlled by the primary carrier which is one of the fully configured carriers. Specifically, the primary carrier is used to exchange traffic and control information of the PHY / MAC between the ABS and the AMS.

A carrier having only a control channel necessary for DL traffic only is defined as a partially configured carrier.

On the other hand, only the secondary carrier (Secondary carrier) can be divided into a channel including all control channels, or a partially configured carrier. Secondary carriers defined as partially configured carriers cannot always be used independently because the primary carrier control channel must be used for DL / UL purposes.

The secondary carrier (completely or partially configured) is an additional carrier for the traffic of the AMS and may be used for the traffic of the AMS or generally for specific assignment commands and rules of the ABS received over the primary carrier. have.

The requirements and information according to the operation of the multi-carrier described above are summarized as follows.

1. Multi-carrier AMS is controlled by a perfectly configured single carrier named "primary carrier". The AMS may have the aforementioned secondary carrier as an additional carrier, where the secondary carrier may be a fully configured carrier or a partially configured carrier.

2. The secondary carrier is an additional carrier for the traffic of the AMS, which may be used by the AMS for traffic, or in general for specific assignment commands and rules received on the ABS via the primary carrier.

3. Advanced MAP is present in a fully configured carrier (primary carrier). However, the existence and use of Advanced MAP for partially configured carriers (secondary carriers) have not been determined yet.

Secondary carriers allocated for asymmetric downlink (hereinafter referred to as "DL") / uplink (hereinafter referred to as "UL") are made based on system load and QoS. Here, the asymmetric allocation of DL and UL means that the number of active secondary carriers of the DL is not always the same as UL. The active secondary carrier means that it is prepared to be used for the operation of the multi-carrier.

In order to support multiple carriers seamlessly, the most important consideration is to design an A-A-MAP IE that provides burst allocation information for DL / UL transmission.

Currently, a proposal for the A-A-MAP IE for a single carrier is made in the DL control draft group of the standardization organization, but there is no proposal for the A-A-MAP IE for the operation of the multi-carrier.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problem, and a technical problem is to provide a multi-carrier support method and apparatus capable of supporting resource allocation of DL / UL for multi-carrier operation.

Disclosure of Invention The present invention has been made in view of the above-described problems, and a technical problem is to provide a multicarrier assignment advanced MAP IE (A-A-MAP IE) supporting resource allocation of DL / UL for multicarrier operation.

In order to achieve the above object, a method of supporting multi-carrier allocation according to an embodiment of the present invention provides a burst allocation of at least one secondary carrier to a primary carrier of an AMS (Advanced Mobile Station). Generating AA-MAP IE (Assignment Advanced MAP IE) for a multi-carrier to which information is directly allocated or to which information of an Advanced MAP area including allocation information of the at least one secondary carrier is allocated; And transmitting the A-A-MAP IE assigned to the primary carrier.

In order to achieve the above object, in the method of supporting multi-carrier allocation according to an embodiment of the present invention, when the AMS supports the multi-carrier, the number of at least one secondary carrier for the AMS is checked, and the at least The burst allocation information of each one of the secondary carriers may be allocated directly or indirectly to the AA-MAP IE.

In order to achieve the above object, in the method for supporting multi-carrier allocation according to an embodiment of the present invention, the A-A-MAP IE for the multi-carrier is assigned to the primary carrier.

In order to achieve the above object, a method of supporting multi-carrier allocation according to an embodiment of the present invention provides a burst for secondary carriers in primary carriers of an AMS (Advanced Mobile Station). Or generating a MAP IE for a multicarrier to provide MAP region information of the secondary carriers; And transmitting the MAP IE on the primary carriers.

In order to achieve the above object, in the method of supporting multi-carrier allocation according to an embodiment of the present invention, when the AMS supports the multi-carrier, the number of secondary carriers for the AMS is checked and the secondary carriers are checked. Each burst allocation information may be allocated directly or indirectly to the AA-MAP IE.

In order to achieve the above object, an apparatus for supporting multi-carrier allocation according to an embodiment of the present invention is a primary carrier and a secondary carrier for the AMS when an AMS (Advanced Mobile Station) supports the multi-carrier. Secondary carrier identification means for confirming whether to allocate a secondary carrier; Second carrier allocation information determining means for checking whether the number of secondary carriers and the allocation information for the AMS is directly allocated or indirectly allocated; Burst allocation information generating means for generating burst allocation information of the AMS; And transmitting means for transmitting allocation information of the burst of the primary carrier and / or the subcarrier of the AMS.

In order to achieve the above object, in the apparatus for supporting multi-carrier allocation according to an embodiment of the present invention, the burst allocation information generating means may be configured when the primary carrier and at least one secondary carrier are allocated to the AMS. The burst allocation information of the secondary carrier may be allocated directly to the AA-MAP IE of the primary carrier.

In order to achieve the above object, in the apparatus for supporting multi-carrier allocation according to an embodiment of the present invention, the burst allocation information generating means may be configured when the primary carrier and at least one secondary carrier are allocated to the AMS. Only the information on the Advanced MAP region to which the burst allocation information of the secondary carrier is allocated is indirectly allocated to the AA-MAP IE of the primary carrier.

In order to achieve the above object, an apparatus for supporting multi-carrier allocation according to an embodiment of the present invention provides a burst for secondary carriers in primary carriers of an AMS (Advanced Mobile Station). MAP IE generating means for generating a MAP IE for a multi-carrier to allocate or to provide MAP region information of the secondary carriers; And transmitting means for transmitting a MAP IE according to the primary carriers.

In order to achieve the above object, an apparatus for supporting multi-carrier allocation according to an embodiment of the present invention checks the number of secondary carriers for the AMS when the AMS supports the multi-carrier, and the secondary carriers Each burst allocation information may be allocated directly or indirectly to the AA-MAP IE.

The present invention according to an embodiment can provide a multi-carrier support method and apparatus capable of supporting resource allocation of DL / UL for multi-carrier operation in a multi-carrier system.

The present invention according to the embodiment can provide a multi-carrier assignment Advanced MAP IE (A-A-MAP IE) that supports resource allocation of DL / UL for multi-carrier operation in a multi-carrier system.

According to an embodiment of the present invention, the burst allocation of DL / UL traffic is performed in a multicarrier system using the proposed multicarrier A-A-MAP IE, so that high data throughput and efficient radio resource management can be achieved.

1 is a view showing a frame structure of a multi-carrier communication system.

2 illustrates a physical layer structure of a multi-carrier communication system.

3 is a diagram illustrating a DL Multicarrier A-A-MAP IE in a method of supporting multicarrier allocation according to an embodiment of the present invention.

4 is a diagram illustrating a UL Multicarrier A-A-MAP IE of a method for supporting multicarrier allocation according to an embodiment of the present invention.

5 is a flowchart illustrating a method for supporting multicarrier allocation according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Before describing an embodiment of the present invention, a frame structure of a multicarrier communication system will be described with reference to FIG. 1, and a physical layer structure of the multicarrier communication system will be briefly described with reference to FIG. Shall be.

1 is a view showing a frame structure of a multi-carrier communication system. The frame structure shown in FIG. 1 can be applied to both a single carrier mode and a multicarrier mode, and as illustrated, a plurality of narrowband carriers are aggregated to effectively support wideband operation. Can be

Each carrier may include its own Preamble and Superframe Header. In addition, some carriers may include less information in the super frame header based on the carrier configuration. A terminal supporting multi-carrier (Advanced Mobile Station (AMS)) may use radio resources on a plurality of RF carriers under management of a common MAC. Depending on the capability of the terminal, this use may include switching or aggregation of traffic on the plurality of RF carriers.

2 is a diagram illustrating a physical layer structure of a multi-carrier communication system.

As shown in FIG. 2, one MAC PDU or Concatenated MAC PUDs may be received via PHY SAP to form an FEC block called a PHY PDU. In addition, as can be seen in FIG. 2, the PHY layer performs channel coding, modulation, and MIMO coding on the PHY PDU and generates one modulated symbol sequence.

Any one of a plurality of carriers, such as a primary carrier or a secondary carrier, may carry a modulated symbol sequence. Alternatively, in case of allocation on a distributed resource unit (DRU), one modulated symbol sequence may be divided into a plurality of segments, and each segment may be transmitted on a different carrier.

All segments of the PHY PDU may use the same MCS level and the same MIMO scheme. However, other PHY PDUs transmitted on the same carriers or on different carriers may have different MCS levels and different MIMO schemes.

Hereinafter, a method and apparatus for supporting multi-carrier allocation according to an embodiment of the present invention will be described with reference to FIGS. 3 to 5.

3 to 5, the method and apparatus for supporting multicarrier allocation for multicarrier operation, and AA-MAP IE (Assignment Advanced MAP IE) capable of supporting resource allocation of DL / UL for multicarrier operation To provide a key feature. Through this, the operation of the multi-carrier can be performed, it is possible to manage the high data throughput and efficient radio resources.

In multicarrier operation, there are two types of burst allocation for each multicarrier AMS. That is, when the secondary carrier is active in the AMS, burst allocation of the primary carrier and burst allocation of the secondary carrier may be performed.

In addition, if there is an A-A-MAP IE for the secondary carrier, the A-A-MAP IE for any active secondary carrier of the AMS provides the carrier's own burst allocation information to the AMS. Therefore, the A-A-MAP IE for the active secondary carrier has a structure compatible with the A-A-MAP IE of the primary carrier.

Here, the multi-carrier A-A-MAP IE according to the embodiment of the present invention is transmitted only through the primary carrier.

The multi-carrier AA-MAP IE according to an embodiment of the present invention allocates a burst (information on the allocation of the secondary carrier of the terminal) directly for the secondary carrier in the primary carrier, or according to the allocation of the secondary carrier Only information of the Advanced MAP area of the secondary carrier is provided. As in the latter case, when providing only the information of the Advanced MAP area, the AMS identifies the corresponding IE in the Advanced MAP area of the secondary carrier through the AA-MAP IE in the primary carrier, and the burst information allocated to the secondary carrier. Can be found.

To this end, the method of supporting multi-carrier allocation according to an embodiment of the present invention provides a multi-carrier A-A-MAP IE for DL, as shown in FIG. 3. In addition, as shown in Figure 4, it provides a multi-carrier A-A-MAP IE for UL.

Hereinafter, since the DL and the UL are implemented through a similar mechanism in the method for supporting multicarrier allocation according to an embodiment of the present invention, a method for supporting multicarrier allocation for the DL will be described in detail. The supporting method will be described with reference to the case of DL.

Basically, multi-carrier AMS supporting multi-carrier operation decodes the A-A-MAP IE transmitted by the primary carrier. At this time, the AMS can decode the A-A-MAP IE according to the DL or the A-A-MAP IE according to the UL shown in FIG.

When the "Secondary Carrier Allocation" field of the IE shown in Figs. 3 and 4 is set to "1", the "Secondary Carrier Allocation" field of the IE is flagged. The IE provides burst assignments of its primary carrier as well as the active secondary carrier.

On the other hand, when the "Secondary Carrier Allocation" field is set to "0", it means that only burst allocation information according to the primary carrier is provided.

The "Primary carrier burst allocation" field contains information on the burst allocation of the primary carrier.

The "Number of active DL secondary carriers" field is information about the number of active secondary carriers for DL traffic or UL traffic allocated to the AMS when the corresponding AMS has been assigned a secondary carrier for DL traffic or UL traffic. It includes. That is, when the flag of the "Number of active DL secondary carriers" field is set to "1", it means that not only the primary carrier but also at least one secondary carrier is allocated to the corresponding UE.

The information in the "Direct Allocation Bitmap" field is provided regardless of the burst allocation for the active secondary carrier. Here, LSB is the logical carrier index of the lowest logical carrier of the active DL secondary carrier.

If the "Direct Allocation Bitmap" field is set to "1", it means direct allocation of the secondary carrier. At this time, the AMS can directly access the assigned burst corresponding to the active secondary carrier through the A-A-MAP IE.

On the other hand, if the "Direct Allocation Bitmap" field is set to "0", it means indirect allocation of the secondary carrier. At this time, the AMS can know only the Advanced MAP region including the number of A-A-MAP IEs of a single carrier. Accordingly, the AMS can identify the location of the IE in the advanced MAP region of the secondary carrier through the A-A-MAP IE included in the primary carrier, and thereby find the burst of the assigned secondary carrier.

Here, the logical carrier index is a logical number for indicating the number of any active secondary carriers allocated to the AMS. The IE allocates a burst allocation for the active secondary carrier from the lowest index to the highest index.

The mechanism of the IE proposed in the present invention can be understood through the general description of the A-A-MAP IE with reference to FIG. 5 to be described later.

The A-A-MAP IE proposed in the present invention is transmitted through the primary carrier of the AMS, and can provide information on the burst allocation for the primary carrier as well as the number of active secondary carriers.

Here, the flexibility of direct and indirect allocation of secondary carriers is provided for burst allocation for active secondary carriers. As described above, burst allocation information of secondary carriers may be directly allocated to the A-A-MAP IE of the primary carrier. In addition, it is possible to indirectly allocate bus allocation information of the secondary carrier by allocating the information of the Advanced MAP region according to the allocation of the secondary carrier to the A-A-MAP IE of the primary carrier.

As a result, the multicarrier A-A-MAP IE proposed by the present invention will provide an effective burst allocation of DL / UL traffic of a multicarrier system.

Referring to FIG. 5, a detailed embodiment of a method and apparatus for supporting multi-carrier allocation according to the present invention will be described. FIG. 5 illustrates an example of a method for supporting multicarrier allocation for DL traffic. The method of supporting multi-carrier allocation for UL traffic may apply to the description of FIG. 5.

If there is DL traffic for any multi-carrier AMS located in the multi-carrier system, burst allocation of the primary carrier is performed for the AMS (S10).

Then, it is checked whether a second carrier corresponding to the AMS exists (S20). In this case, the presence of the secondary carrier may be performed by checking whether the value of the "Secondary Carrier Allocation" field of the DL multi-carrier A-A-MAP IE shown in FIG. 3 is "1".

As a result of checking in S20, when the value of the secondary carrier allocation location is not "1", it means that there is no secondary carrier for the corresponding AMS (S30). At this time, the burst allocation for the AMS is terminated.

On the other hand, as a result of checking in S20, if the "Secondary Carrier Allocation" field value is not "1", it means that there is an active secondary carrier for the corresponding AMS.

In this case, the "Direct Allocation" corresponding to each active secondary carrier (the first secondary carrier to the nth secondary carrier) up to the number of active secondary carriers preset in the "Number of active DL secondary carriers" shown in FIG. 3. Check the bit value (1 or 0) of "Bitmap". Through this, it is determined whether direct or indirect allocation of the active secondary carrier allocated to the AMS (S40). In this case, at least one active secondary carrier may be allocated to the AMS, and each secondary carrier may be allocated directly or indirectly.

Hereinafter, it is assumed that two active secondary carriers are allocated to any AMS, a first active secondary carrier of the two active secondary carriers is directly allocated, and a second active secondary carrier is indirectly allocated. .

As a result of the determination of S40, when the "Direct Allocation Bitmap" of the first active secondary carrier is set to "1", the burst allocation information of the first active secondary carrier is directly allocated to the AA-MAP IE of the primary carrier. This is the case.

Therefore, information on the burst allocation of the first active secondary carrier is directly allocated to the A-A-MAP IE of the primary carrier (S50).

Thereafter, a logical index number representing the number of active secondary carriers is increased to "2", and it is checked whether the logical index number exceeds a preset number of active secondary carriers (S60).

As a result of checking in S60, if the logical index number does not exceed a preset number of active secondary carriers, the procedure of S40 is performed to determine whether to directly or indirectly allocate a second active secondary carrier.

As a result of the determination on the second active secondary carrier at S40, when the "Direct Allocation Bitmap" of the second active secondary carrier is not set to "1", the second active secondary carrier has burst allocation information. Corresponds to the case indirectly allocated to the AA-MAP IE of the primary carrier.

Therefore, only the information on the advanced MAP region including information on the burst allocation of the second active secondary carrier is indirectly allocated to the A-A-MAP IE of the primary carrier (S70).

Thereafter, the logical index number, which means the number of active secondary carriers, is increased to "3", and it is checked whether the logical index number exceeds the preset number of active secondary carriers (S60). ).

If the logical index number exceeds the preset number of active secondary carriers, as a result of checking of S60, the burst allocation of the primary carrier and the secondary carrier for any AMS is completed, and the burst for any AMS and Send a frame to which information on burst allocation for any AMS is allocated.

The multi-carrier support method according to the embodiment of the present invention described above can be applied to both uplink (UL) data transmission in which the terminal transmits data to the base station and downlink (DL) data transmission in which the base station transmits data to the terminal. have.

On the other hand, the multi-carrier support method according to an embodiment of the present invention described above may be performed by the multi-carrier support apparatus, such a multi-carrier support apparatus may be included in the base station.

In accordance with another aspect of the present invention, there is provided a support apparatus for a multicarrier, including: secondary carrier identification means for confirming whether a secondary carrier exists for an AMS; Second carrier allocation information determining means for checking whether the number of secondary carriers and the allocation information for the AMS is directly allocated or indirectly allocated; Burst allocation information generating means for generating burst allocation information of the arbitrary AMS; And transmission means for transmitting allocation information of the burst of the primary carrier and / or subcarrier of the AMS.

Specifically, the burst allocation information generating means may directly allocate burst allocation information of the secondary carrier to the AA-MAP IE of the primary carrier when the primary carrier and the secondary carrier are allocated to any AMS. . In addition, only information on an advanced MAP region to which burst allocation information of the secondary carrier is allocated may be indirectly allocated to the A-A-MAP IE of the primary carrier.

The above-described multicarrier support method may be implemented in the form of program instructions that can be executed by various computer means, and recorded in a computer-readable recording medium. In this case, the computer-readable recording medium may include program instructions, data files, data structures, and the like, alone or in combination. Meanwhile, the program instructions recorded on the recording medium may be those specially designed and configured for the present invention, or may be known and available to those skilled in computer software.

Computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks such as floppy disks. Magnetic-Optical Media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. The recording medium may be a transmission medium such as an optical or metal wire, a waveguide, or the like including a carrier wave for transmitting a signal specifying a program command, a data structure, or the like.

In addition, program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

On the other hand, those skilled in the art will understand that the present invention described above can be implemented in other specific forms without changing the technical spirit or essential features.

Therefore, it is to be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. do.

Claims

Advanced MAP including burst allocation information of at least one secondary carrier directly assigned to a primary carrier of an AMS (Advanced Mobile Station) or including allocation information of the at least one secondary carrier Generating AA-MAP IE (Assignment Advanced MAP IE) for the multi-carrier to which the information of the region is allocated; And

And transmitting an A-A-MAP IE assigned to the primary carrier.
The method of claim 1,

If the AMS supports the multi-carrier, the number of at least one secondary carrier for the AMS is checked,

And allocating burst allocation information of each of the at least one secondary carrier directly or indirectly to the A-A-MAP IE.
The method of claim 1,

The A-A-MAP IE for the multi-carrier is assigned to the primary carrier.
The method of claim 1, wherein the primary carrier

Method for supporting multi-carrier allocation, characterized in that the carrier is independently and completely configured including all control channels.
The method of claim 1, wherein the secondary carrier

A method for supporting multi-carrier allocation, characterized in that the carrier is added for downlink (DL) / uplink (UL) traffic of the multi-carrier Advanced Mobile Station (AMS).
MAP for multicarrier to allocate bursts for secondary carriers in primary carriers of Advanced Mobile Station (AMS), or to provide MAP region information of the secondary carriers. Generating an IE; And

And transmitting the MAP IE on the primary carriers.
The method of claim 6,

If the AMS supports the multi-carrier, check the number of secondary carriers for the AMS,

And assigning burst allocation information of each of the secondary carriers directly or indirectly to the A-A-MAP IE.
Secondary carrier identification means for confirming whether a primary carrier and a secondary carrier are allocated to the AMS when an advanced mobile station (AMS) supports multi-carriers;

Second carrier allocation information determining means for checking whether the number of secondary carriers and the allocation information for the AMS is directly allocated or indirectly allocated;

Burst allocation information generating means for generating burst allocation information of the AMS; And

And transmission means for transmitting allocation information of bursts of the primary carrier and / or the subcarrier of the AMS.
9. The apparatus of claim 8, wherein the burst allocation information generating means

When the primary carrier and at least one secondary carrier is allocated to the AMS, burst allocation information of the secondary carrier is directly allocated to the AA-MAP IE of the primary carrier. Device.
9. The apparatus of claim 8, wherein the burst allocation information generating means

When the primary carrier and the at least one secondary carrier are allocated to the AMS, only information on an advanced MAP region to which burst allocation information of the secondary carrier is allocated is indirectly allocated to the AA-MAP IE of the primary carrier. Supporting device for multi-carrier allocation, characterized in that.
MAP for multicarriers to allocate bursts for secondary carriers in primary carriers of Advanced Mobile Station (AMS) or to provide MAP region information of the secondary carriers. MAP IE generating means for generating an IE; And

And transmission means for transmitting a MAP IE according to the primary carriers.
The method of claim 11,

When the AMS supports multi-carriers, the number of secondary carriers for the AMS is checked, and burst allocation information of each of the secondary carriers is directly or indirectly allocated to the AA-MAP IE. Device supporting multicarrier allocation.