KR20110095123A - System and method that allocate channel of multi traffic stream - Google Patents

Abstract

PURPOSE: A channel allocating system and method thereof are provided to request channel allocation about a plurality of related traffic streams by using one message. CONSTITUTION: A communication unit(120) transceives messages for channel allocation and channel release with a channel response device. A correlation confirmation unit(112) checks correlation of traffic streams which receives channel allocation. The correlation confirmation unit confirms whether the traffic streams are related or not. An allocation requesting unit(114) generates a channel requesting message requesting a channel allocation about related traffic streams. The allocation requesting unit transmits the channel allocation request message to the channel responding device through the communication unit.

Description

System and method that allocate channel of multi traffic stream}

The present invention relates to allocating channels for traffic streams when communicating over a wireless LAN. The present invention relates to a system and a method for collecting and assigning various types of traffic and requesting channel allocation at once.

The existing WLAN standard uses a method of allocating channels according to QoS of traffic. In the existing WLAN, an ADD Traffic Stream (ADDTS) procedure, which is a separate channel allocation procedure, needs to be performed for each traffic stream. However, in a high-definition multimedia interface (HDMI) or unequal error protection (UEP) application, multiple traffic streams may exist in one session. HDMI, for example, consists of an audio stream, a control stream and a video stream. UEP may be divided into Most Significant Bit (MSB) data and Least Significant Bit (LSB) data. In the existing channel allocation method of allocating channels for each stream for each stream included in one session, only some of the relevant streams may receive channel allocation. However, if any one of the relevant streams does not receive channel assignments, the service itself may not be available, and the user priority for each stream is different, so it is necessary to allocate streams comprehensively. However, the conventional standard does not provide such a method. If you negotiate channel assignments in sequence for several streams belonging to a session, some streams may not be assigned, and even if they are assigned, it may be difficult to assign them according to user priority.

Embodiments of the present invention provide a channel assignment system and method for allocating channels of a multi-traffic stream.

Embodiments of the present invention relate to allocating channels for traffic streams when communicating over a wireless LAN, and provide a system and method for collecting channels by requesting channel allocation at a time by collecting various types of traffic.

Embodiments of the present invention provide an apparatus and method for requesting and assigning channels for a plurality of traffic streams related to the case where there are traffic streams having various QoS requirements in one session, such as HDMI or UEP.

According to an embodiment of the present invention, a channel requesting apparatus includes a communication unit for transmitting and receiving messages for channel assignment and channel release, and a correlation between the traffic streams to be assigned with a channel, and the correlation between the traffic streams. A correlation checking unit for checking whether or not, and an allocation request unit for generating a channel allocation request message for requesting channel allocation for related traffic streams at one time and transmitting the same to the channel response device through the communication unit.

The channel response device according to an embodiment of the present invention includes a communication unit for transmitting and receiving messages for channel assignment and channel release and a channel assignment request message from the channel request device, and included in the channel assignment request message. Checking the bandwidth of the channel required by the relevant traffic streams and checking the currently available channel, if the channel allocation for all the relevant traffic streams is possible, a channel assignment response message including the channel information to be allocated is generated to generate the channel assignment response message. And a channel allocator for transmitting to the request device.

The method for requesting channel allocation in a channel requesting apparatus according to an embodiment of the present invention comprises the steps of checking the correlation of traffic streams to be assigned to the channel and confirming whether the traffic streams are related to each other. Generating a channel assignment request message for requesting channel assignments for the devices at once and transmitting the channel assignment request message to a channel response device.

In a channel response apparatus according to an embodiment of the present invention, a method for allocating a channel may include receiving a channel allocation request message from a channel requesting apparatus, and a bandwidth of a channel required by related traffic streams included in the channel allocation request message. A channel assignment response including a step of checking, checking a currently available channel, checking whether a channel can be allocated to all of the relevant traffic streams, and if the result of the check is assignable, assigning channel information Generating a message and transmitting the channel assignment response message to the channel requesting device.

The present invention is a system for requesting allocation and allocation of channels for a plurality of traffic streams related by using one message when there are traffic streams having various QoS requirements in one session, such as HDMI or UEP. And to a method. The present invention can request channel allocation faster than the conventional method by requesting channel allocation for several streams at once. In addition, as a request for a channel for related traffic streams at a time, some of the related traffic streams have not been assigned a channel assignment and thus cannot provide a proper service. It is also applicable to Fast Session Transfer which requires fast session switching.

1 is a diagram illustrating a configuration of a channel requesting device for requesting channel allocation and channel release according to an embodiment of the present invention;
2 is a diagram illustrating a configuration of a channel response device for allocating and releasing a channel according to an embodiment of the present invention;
3 is a flowchart illustrating a process of requesting channels for a plurality of related traffic streams in a channel requesting apparatus of a channel allocation system according to an embodiment of the present invention;
4 is a flowchart illustrating a process of allocating channels for a plurality of related traffic streams in a channel response apparatus of a channel assignment system according to an embodiment of the present invention.

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

The present invention relates to an apparatus and method for requesting and assigning channels for a plurality of traffic streams related to the case where there are traffic streams having various QoS requirements in one session such as HDMI or UEP.

FIG. 1 is a diagram illustrating a configuration of a channel requesting apparatus for requesting channel allocation and channel release according to an embodiment of the present invention.

Referring to FIG. 1, the channel request apparatus 100 includes a control unit 110, a communication unit 120, a correlation check unit 112, an allocation request unit 114, and a release request unit 116.

The communication unit 120 communicates with the channel response device to transmit and receive messages for channel allocation and channel release.

When a traffic stream to be allocated to a channel is generated, the correlation checking unit 112 checks correlations of the generated traffic streams and checks related traffic streams.

For example, in the case of a traffic stream generated by a high-definition multimedia interface (HDMI) application, an audio stream, a control stream, and a video stream divided from one data are identified as related traffic streams. In the case of a traffic stream generated by an UEP (Unequal Error Protection) application, the MSB (Most Significant Bit) data and LSB (Least Significant Bit) data divided from one data are identified as a related traffic stream.

The allocation request unit 114 generates a channel allocation request message for requesting channel allocation for related traffic streams at one time and transmits the same to the channel response device through the communication unit 120. That is, the allocation request unit 114, in the case of the traffic stream generated by the HDMI application instead of the channel allocation request message including only one traffic stream at a time, outputs a channel allocation request message including all of the audio stream, the control stream, and the video stream. Create In addition, the allocation request unit 114 generates a channel allocation request message including both the traffic stream of the MSB data and the traffic stream of the LSB data when the traffic stream is generated by the UEP application.

At this time, the channel allocation request message may be configured as shown in Table 1 below.

Here, Category represents a category including a message, and Action is an identifier for identifying a message in the corresponding Category. That is, Category and Action are information for identifying a message. The Dialog Token is the information needed to match the request and response messages. TSPEC is information indicating QoS requirements of traffic streams. TCLAS is information used to distinguish specific traffic streams in the upper layer. It is a value indicating whether Ethernet traffic, TCP traffic, and user priority are used. TCLAS processing is information necessary to indicate how to process the MSDU (MAC Service Data Unit) coming from the upper layer when multiple TCLAS are included in the channel allocation request message.

Subsequently, when the allocation request unit 114 receives the channel allocation response message from the channel response device, the allocation request unit 114 checks the channel allocation response message to confirm whether the channel is allocated.

If the channel is allocated as a result of checking the channel assignment response message, the assignment requester 114 provides the allocated channel information to the controller 110.

If the channel is not allocated as a result of checking the channel allocation response message, the allocation request unit 114 transmits the channel allocation request message to the channel response device again after the delay time included in the channel allocation response message.

At this time, the channel assignment response message may be configured as shown in Table 2 below.

Here, Category represents a category including a message, and Action is an identifier for identifying a message in the corresponding Category. That is, Category and Action are information for identifying a message. The Dialog Token is the information needed to match the request and response messages. TSPEC is information indicating QoS requirements of traffic streams. TCLAS is information used to distinguish specific traffic streams in the upper layer. It is a value indicating whether Ethernet traffic, TCP traffic, and user priority are used. TCLAS processing is information required to indicate how to process the MSDU (MAC Service Data Unit) coming from the upper layer when multiple TCLAS are included in the channel assignment response message.

The Status Code is a value indicating whether the channel allocation is successful, the TS Delay is a delay time to be waited when the channel allocation request message is retransmitted, and the Schedule is information indicating the time when the real channel is allocated.

The release request unit 116 generates a channel release request message for relevant traffic streams and transmits the generated channel to the channel response device when the transmission of related traffic streams is completed or the channel allocation time expires. .

At this time, the channel release request message may be configured as shown in Table 3 below.

Here, Category represents a category including a message, and Action is an identifier for identifying a message in the corresponding Category. That is, Category and Action are information for identifying a message. The reason code is information indicating a reason for requesting channel release, and the TS Info field is a field value present in the TSPEC IE, which is information on traffic streams.

The controller 110 may control the overall operation of the channel request apparatus 100. The controller 110 may perform the functions of the pairing unit 130, the authentication information generating unit 140, the random number regenerating unit 150, and the authenticating unit 160. The controller 110, the pairing unit 130, the authentication information generation unit 140, the random number regeneration unit 150, and the authentication unit 160 are illustrated separately to explain each function. Therefore, the controller 110 may include at least one processor configured to perform functions of the pairing unit 130, the authentication information generating unit 140, the random number regenerating unit 150, and the authenticating unit 160. have. In addition, the controller 110 may include at least one processor configured to perform some of the functions of the pairing unit 130, the authentication information generating unit 140, the random number regenerating unit 150, and the authenticating unit 160. It may include.

2 is a diagram illustrating a configuration of a channel response device for allocating and releasing a channel according to an embodiment of the present invention.

Referring to FIG. 2, the channel response device 200 includes a controller 210, a communication unit 220, a channel allocator 212, and a channel release unit 214.

The communication unit 220 communicates with the channel requesting apparatus 100 to transmit and receive messages for channel allocation and channel release.

When the channel allocation unit 212 receives the channel allocation request message from the channel requesting apparatus 100, the channel allocation unit 212 checks the bandwidth of the channel required by the relevant traffic streams included in the channel allocation request message, and confirms the currently available channel.

The channel allocator 212 generates a channel assignment response message including allocating channel information when the channel allocation for all relevant traffic streams included in the channel assignment request message is possible and transmits the generated channel assignment response message to the channel request apparatus 100. do.

The channel allocator 212 generates a channel assignment response message indicating that the channel is not allocated when the channel allocation for all relevant traffic streams included in the channel allocation request message is not possible, and thereby the channel request apparatus 100. Send to

When the channel release unit 214 receives a channel release request message from the channel requesting apparatus 100, the channel release unit 214 checks channel information allocated to relevant traffic streams included in the channel release request message and assigns the channel information. Releases a channel and changes it to an available channel.

The controller 210 may control the overall operation of the channel response device 200. The controller 210 may perform the functions of the channel allocator 212 and the channel release unit 214. The controller 210, the channel allocator 212, and the channel release unit 214 are illustrated separately to describe respective functions. Accordingly, the controller 210 may include at least one processor configured to perform functions of each of the channel allocator 212 and the channel release unit 214. In addition, the controller 210 may include at least one processor configured to perform some of the functions of each of the channel allocator 212 and the channel release unit 214.

Hereinafter, a method of allocating a channel of a multi traffic stream in the channel allocation system according to the present invention configured as described above will be described with reference to the accompanying drawings.

3 is a flowchart illustrating a process of requesting channels for a plurality of related traffic streams in a channel requesting apparatus of a channel allocation system according to an exemplary embodiment of the present invention.

Referring to FIG. 3, when the channel request apparatus 100 detects a channel request event in step 310, the channel request apparatus 100 checks correlations of traffic streams to be allocated to the channel in step 312 to identify related traffic streams.

In operation 314, the channel request apparatus 100 generates a channel assignment request message for relevant traffic streams and transmits the generated channel assignment request message to the channel response apparatus 200.

At this time, the channel assignment request message includes message identification information (ID), matching information with a channel assignment response message (Dialog Token), information on QoS requirements of the traffic streams (TSPEC), and information for classifying traffic streams (TCLAS). And at least one of information on a processing method (TCLAS processing).

Thereafter, when the channel request apparatus 100 receives a channel assignment response message for disallowing channel assignment in step 316, the channel request apparatus 100 returns to step 314 after a delay time included in the channel assignment response message in step 318.

In operation 316, the channel request apparatus 100 transmits a traffic stream using the assigned channel in step 320.

In this case, the channel assignment response message includes message identification information (ID), matching information with a channel assignment request message (Dialog Token), information on QoS requirements of traffic streams (TSPEC), and information for classifying traffic streams (TCLAS). Information such as TCLAS processing, information indicating whether channel allocation is successful (Status Code), time delay to be delayed when the channel allocation request message is resent (TS Delay), and time when the actual channel is allocated. It includes at least one of the information (Schedule) indicating.

In operation 322, when the channel request apparatus 100 detects that the transmission of related traffic streams is completed or the channel allocation time ends, the channel request apparatus 100 releases a channel release request message for the relevant traffic streams. Generate and transmit to the channel response device.

In this case, the channel release request message includes at least one of message identification information (ID), information indicating a reason for requesting channel release (Reason Code), and information on traffic streams (TS Info).

4 is a flowchart illustrating a process of allocating channels for a plurality of related traffic streams in a channel response apparatus of a channel assignment system according to an embodiment of the present invention.

Referring to FIG. 4, when the channel response device 200 receives the channel allocation request message in step 410, the channel response device 200 checks the bandwidth of the channel required by the relevant traffic streams included in the channel allocation request message in step 412. In operation 414, the channel response device 200 checks the currently available channel.

At this time, the channel assignment request message includes message identification information (ID), matching information with a channel assignment response message (Dialog Token), information on QoS requirements of the traffic streams (TSPEC), and information for classifying traffic streams (TCLAS). And at least one of information on a processing method (TCLAS processing).

In operation 416, the channel response apparatus 200 determines whether channel allocation for all relevant traffic streams included in the channel allocation request message is possible.

If the channel assignment for all relevant traffic streams included in the channel assignment request message is not possible, the channel response device 200 generates a channel assignment response message indicating that the channel is not allocated in step 418. It generates and transmits it to the channel request device 100.

If the channel assignment for all relevant traffic streams included in the channel assignment request message is possible in step 416, the channel response device 200 generates a channel assignment response message including channel information allocated in step 420. It transmits to the channel request apparatus 100.

Subsequently, when the channel response device 200 receives the channel release request message from the channel request apparatus 100 in step 422, the channel response device 200 allocates the traffic streams related to the relevant traffic streams included in the channel release request message in step 424. Check the channel information. In operation 426, the channel response apparatus 200 releases the allocated channel and changes the channel to an available channel.

Methods according to an embodiment of the present invention can be implemented in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

Claims (20)

A communication unit for transmitting and receiving a message for channel allocation and channel release with a channel response device;
A correlation checking unit that checks correlations of traffic streams to be assigned with channels and determines whether the traffic streams are related; And
An assignment request unit for generating a channel assignment request message for requesting channel assignment for relevant traffic streams at one time and transmitting the channel assignment request message to the channel response device through the communication unit;
Channel request device.
The method of claim 1,
The channel assignment request message is
Message identification information (ID), matching information with channel assignment response message (Dialog Token), information on QoS requirements of traffic streams (TSPEC), information for classifying traffic streams (TCLAS) and information on processing methods ( TCLAS processing)
Channel request device.
The method of claim 1,
The allocation request unit,
Receiving a channel assignment response message from the channel response device, confirms whether the channel is assigned by checking the channel assignment response message, and confirms allocated channel information if the channel is allocated;
Channel request device.
The method of claim 1,
The allocation request unit,
If the channel is not allocated as a result of checking the channel assignment response message, the channel assignment request message is retransmitted to the channel response device after a delay time included in the channel assignment response message.
Channel request device.
The method of claim 3,
The channel assignment response message
Message identification information (ID), matching information with the channel assignment request message (Dialog Token), information on QoS requirements of the traffic streams (TSPEC), information for distinguishing traffic streams (TCLAS), information on the processing method (TCLAS processing), information indicating whether the channel allocation is successful (Status Code), time information to be delayed when the channel allocation request message is resent (TS Delay), and information indicating the time when the actual channel is allocated (Schedule) Characterized in that it comprises at least one
Channel request device.
The method of claim 1,
And a release request unit for generating a channel release request message for requesting channel release for the related traffic streams and transmitting the generated channel release request message to the channel response device upon detecting that the allocated channel is terminated.
Channel request device.
The method of claim 6,
The channel release request message,
And at least one of message identification information (ID), information indicating a reason for requesting channel release (Reason Code), and information on traffic streams (TS Info).
Channel request device.
A communication unit for transmitting and receiving a message for channel allocation and channel release with a channel requesting device; And
Upon receiving a channel allocation request message from the channel requesting device, the bandwidth of the channel required by the relevant traffic streams included in the channel allocation request message is checked and the currently available channel is checked so that the channel for all the relevant traffic streams can be checked. If possible, the channel allocator may include: a channel allocator configured to generate a channel assignment response message including allocating channel information and transmit the generated channel assignment response message to the channel requesting apparatus.
Channel response device.
The method of claim 8,
The channel assignment request message is
Message identification information (ID), matching information with channel assignment response message (Dialog Token), information on QoS requirements of traffic streams (TSPEC), information for classifying traffic streams (TCLAS) and information on processing methods ( TCLAS processing)
Channel response device.
The method of claim 8,
The channel assignment response message is
Message identification information (ID), matching information with the channel assignment request message (Dialog Token), information on QoS requirements of the traffic streams (TSPEC), information for distinguishing traffic streams (TCLAS), information on the processing method (TCLAS processing), information indicating whether the channel allocation is successful (Status Code), time information to be delayed when the channel allocation request message is resent (TS Delay), and information indicating the time when the actual channel is allocated (Schedule) Characterized in that it comprises at least one
Channel response device.
The method of claim 8,
The channel allocation unit,
If the channel allocation for all of the relevant traffic streams included in the channel allocation request message is not possible, a channel allocation response message indicating that a channel is not allocated is generated and transmitted to the channel requesting apparatus.
Channel response device.
The method of claim 8,
Receiving a channel release request message from the channel requesting device, further comprising a channel release unit for identifying channels allocated to the relevant traffic streams included in the channel release request message and releasing the allocated channels; doing
Channel response device.
The method of claim 12,
The channel release request message,
And at least one of message identification information (ID), information indicating a reason for requesting channel release (Reason Code), and information on traffic streams (TS Info).
Channel response device.
Confirming correlation of the traffic streams by checking correlations of traffic streams to be assigned with a channel;
Generating a channel assignment request message requesting channel assignments for relevant traffic streams at one time; And
Transmitting the channel assignment request message to a channel response device.
Channel request method for requesting channel allocation.
The method of claim 14,
Checking whether the channel is allocated by checking the channel allocation response message when receiving the channel allocation response message from the channel response device; And
Confirming the allocated channel information if the channel is allocated as a result of the check;
Channel request method for requesting channel allocation.
16. The method of claim 15,
Delaying the channel allocation response message by a delay time included in the channel allocation response message if the channel is not allocated; And
Retransmitting the channel assignment request message to the channel response device after the delay.
Channel request method for requesting channel allocation.
16. The method of claim 15,
Generating a channel release request message requesting channel release for the relevant traffic streams upon detecting that the allocated channel is terminated; And
And transmitting the channel release request message to a channel response device.
Channel request method for requesting channel allocation.
Receiving a channel allocation request message from a channel requesting device;
Identifying a bandwidth of a channel required by relevant traffic streams included in the channel allocation request message;
Identifying currently available channels;
Confirming that channel assignment for all of the relevant traffic streams is possible;
Generating a channel assignment response message including channel information to be allocated, if it is possible to allocate the identification result; And
Transmitting the channel assignment response message to the channel requesting device.
How to assign a channel in a channel response device.
The method of claim 18,
If it is not possible to allocate the result of the check, generating a channel assignment response message indicating that the channel is not allocated and transmitting the generated channel assignment response message to the channel requesting apparatus.
How to assign a channel in a channel response device.
The method of claim 18,
Receiving a channel release request message from the channel requesting device;
Identifying channels assigned to the relevant traffic streams included in the channel release request message; And
Releasing the assigned channels further comprising:
How to assign a channel in a channel response device.

Images