1. A method of setting a Media Access Control (MAC) packet header when a MAC packet is transmitted in a mobile communication system, the method comprising the steps of:
setting a Length (LEN) unit of the MAC packet header to 1 byte when a Transport Block (TB) size is less than or equal to a first predetermined threshold value; and
setting the LEN unit to 2 bytes when the TB size is greater than the first predetermined threshold value and is less than or equal to a second predetermined threshold value.
2. The method as claimed in claim 1, further comprising setting the LEN unit to 4 bytes when the TB size is greater than the second predetermined threshold value.
3. The method as claimed in claim 2, further comprising generating a TB with a size set in a LEN field by padding the TB with zeros (0) when the TB size is greater than the first predetermined threshold value and is different from the size set in the LEN field.
4. The method as claimed in claim 2, further comprising transmitting information on the TB size over a control channel.
5. The method as claimed in claim 1, further comprising generating a TB with a size set in a LEN field by padding the TB with zeros (0) when the TB size is greater than the first predetermined threshold value and is different from the size set in the LEN field.
6. The method as claimed in claim 1, further comprising transmitting information on the TB size over a control channel.
7. A method of interpreting a Media Access Control (MAC) packet header when a MAC packet is received in a mobile communication system where size information of a Transport Block (TB) transmitted over a traffic channel is provided over a control channel, the method comprising the steps of:
receiving the size information of the TB over the control channel;
interpreting a LEN field of the MAC packet header at face value when the received size information is less than or equal to a first predetermined threshold value; and
interpreting the LEN field of the MAC packet header as indicating a size that is as twice as large as a LEN field value when the received size information is greater than the first predetermined threshold value and is less than or equal to a second predetermined threshold value.
8. The method as claimed in claim 7, further comprising interpreting the LEN field of the MAC packet header as indicating a size that is four times as large as the LEN field value when the received size information is greater than the second predetermined threshold value.
9. An apparatus for setting a Media Access Control (MAC) packet header when a MAC packet is transmitted in a mobile communication system, the apparatus comprising:
at least one Radio Link Control (RLC) transmission unit for splitting application data received from an upper layer into transport data blocks with a size transmittable over a traffic channel, and outputting the split data blocks;
a data construction unit for generating a Transport Block (TB) to be transmitted over the traffic channel by joining the transport data blocks;
a control unit for setting a LEN unit of a header of the TB to 1 byte when a TB size is less than or equal to a first predetermined threshold value, and setting the LEN unit of the header of the TB to 2 bytes when the TB size is greater than the first predetermined threshold value and is less than or equal to a second predetermined threshold value; and
a header insertion unit for inserting the header, the LEN unit of which has been set.
10. The apparatus as claimed in claim 9, wherein the control unit sets the LEN unit to 4 bytes when the TB size is greater than the second predetermined threshold value.
11. The apparatus as claimed in claim 10, wherein the data construction unit generates the TB with a size set in a LEN field included in the header of the TB by padding the TB with zeros (0) when the TB size is greater than the first predetermined threshold value and is different from the size set in the LEN field.
12. The apparatus as claimed in claim 10, further comprising a control channel transmission unit for transmitting size information of the TB over a control channel.
13. The apparatus as claimed in claim 9, wherein the data construction unit generates the TB with a size set in a LEN field included in the header of the TB by padding the TB with zeros (0) when the TB size is greater than the first predetermined threshold value and is different from the size set in the LEN field.
14. The apparatus as claimed in claim 9, further comprising a control channel transmission unit for transmitting size information of the TB over a control channel.
15. The apparatus as claimed in claim 9, further comprising a Hybrid Automatic Retransmission Request (HARQ) control unit for controlling HARQ of transmitted data.
16. An apparatus for interpreting a Media Access Control (MAC) packet header when a MAC packet is received in a mobile communication system where size information of a Transport Block (TB) transmitted over a traffic channel is provided over a control channel, the apparatus comprising:
a control channel processing unit for checking the size information of the TB, received over the control channel, to thereby detect a TB size, interpreting a LEN field of the MAC packet header at face value when the TB size is less than or equal to a first predetermined threshold value, and interpreting the LEN field of the MAC packet header as indicating a size that is twice as large as a LEN field value when the TB size is greater than the first predetermined threshold value and is equal to or less than a second predetermined threshold value;
a MAC packet header interpretation unit for interpreting the MAC packet header under the control of the control channel processing unit; and
a data separation unit for separately outputting transport data blocks of the MAC packet by using interpretation information forwarded from the MAC packet header interpretation unit.
17. The apparatus as claimed in claim 16, wherein the control channel processing unit controls the MAC packet header interpretation unit to interpret the LEN field of the MAC packet header as indicating a size that is four times as large as the LEN field value when the TB size is greater than the second predetermined threshold value.
18. The apparatus as claimed in claim 16, further comprising a Hybrid Automatic Retransmission Request (HARQ) control unit for detecting errors of the received MAC packet, and requesting HARQ when the errors are detected.
19. The apparatus as claimed in claim 16, further comprising at least a Radio Link Control (RLC) reception unit for processing the separated data blocks according to respective application data.
20. A method of setting a Media Access Control (MAC) packet header when a MAC packet is transmitted in a mobile communication system, the method comprising the steps of:
setting a length of a Length (LEN) field included in the MAC packet header according to a Transport Block (TB) size;
transmitting a control channel for informing a receiving side of the length of the LEN field included in the MAC packet header;
indicating the TB size by the set length of the LEN field to thereby configure the MAC packet; and
transmitting the MAC packet over a traffic channel.
21. The method as claimed in claim 20, further comprising informing the receiving side of a length of the MAC packet through the control channel.
22. The method as claimed in claim 20, further comprising generating a TB with a LEN field size by padding the TB with zeros (0) when the TB size is smaller than a LEN field value of the MAC packet header.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An image processing apparatus comprising:
an image forming unit configured to form an image;
an input unit configured to input, in response to detecting an abnormality in the formed image, a plurality of pieces of information about a feature of the formed image via an operation unit; and
a chart forming unit configured to form, by the image forming unit, a chart for determining an abnormality in an image, wherein the chart is decided according to a combination of the plurality of pieces of information input by the input unit via the operation unit.
2. The image processing apparatus according to claim 1, further comprising a determining unit configured to output a chart formed by the chart forming unit, and determine an abnormality in an image formed by the image forming unit, by using the output chart.
3. The image processing apparatus according to claim 1, further comprising a decision unit configured to decide an analysis process according to a combination of the plurality of pieces of information input by the input unit,
wherein the analysis process decided by the decision unit is executed on a chart formed by the chart forming unit.
4. The image processing apparatus according to claim 1, wherein a chart output from the chart forming unit is a chart selectively decided from a plurality of types of charts.
5. The image processing apparatus according to claim 3, wherein an analysis process decided by the decision unit is an analysis process selectively decided from a plurality of types of analysis processes.
6. The image processing apparatus according to claim 2, wherein the determining unit determines an abnormality in an image formed by the image forming unit, by using a feature amount acquired from a reading result of a chart output from the chart forming unit.
7. The image processing apparatus according to claim 2, further comprising a unit configured to determine whether a correction process for correcting an abnormality in an image that is determined by the determining unit is executable,
wherein in a case where it is determined that the correction process is executable, the correction process for correcting the abnormality of the image that is determined by the determining unit is executed.
8. The image processing apparatus according to claim 7, wherein in a case where the correction process is executable, a user is prompted to execute a correction function.
9. A method for controlling an image processing apparatus including an image forming unit configured to form an image, the method comprising:
inputting, in response to detecting an abnormality in the formed image, a plurality of pieces of information about a feature of the formed image via an operation unit; and
forming, by the image forming unit, a chart for determining an abnormality in an image, wherein the chart is decided according to a combination of the plurality of pieces of information input by the inputting via the operation unit.
10. A non-transitory computer readable storage medium storing a program for causing a computer to perform the method according to claim 9.