Wireless Communication Systems and Methods Using Flexible Length Indicators

• US 20090086853A1
• Filed: 08/25/2008
• Published: 04/02/2009
• Est. Priority Date: 09/28/2007
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: YE, Shiang-Rung
• Granted Patent: US 7,949,013 B2
• Time in Patent Office: Days
• US Class Current: 375/340
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365

Abstract

A wireless communication device includes a data receiving interface, a data processing device coupled with the data receiving interface, and a processing device coupled with the data receiving interface. The data receiving interface is configured to receive a first sub-group and a second sub-group of data for transmission. The first sub-group of data includes data contents for providing at least a portion of a first service, and the second sub-group of data includes data contents for providing at least a portion of a second service. The data processing device is configured to combine the first sub-group of data and the second sub-group of data as a portion of a data transmission group. The processing device is configured to provide a size of a first length indicator based at least on a size of the data transmission group. The first length indicator is configured to indicate a size of the first sub-group of data. The processing device is also configured to provide a size of a second length indicator based on one or more numbers or considerations, such as (a) the size of the first length indicator; (b) the size of the first sub-group of data; (c) the size of the data transmission group; and (d) the size of a header section. The second length indicator is configured to indicate the size of the second sub-group of data.

Claims

1. A wireless communication device comprising:

a data receiving interface configured to receive a first sub-group and a second sub-group of data for transmission, the first sub-group of data comprising data contents for providing at least a portion of at least one communication service, and the second sub-group of data comprising data contents for providing another portion of the at least one communication service;

a data processing device coupled with the data receiving interface and configured to combine the first sub-group of data and the second sub-group of data as a portion of a data transmission group;

a processing device coupled with the data receiving interface and configured;

(1) to reorder the sub-groups in a descending order based on sizes of the sub-groups;

(2) to provide a size of a first length indicator based at least on a size of the data transmission group, the first length indicator being configured to indicate a size of a first re-ordered sub-group of data; and

(3) to provide a size of a second length indicator based on at least one of (a) a size of the first length indicator;

(b) a size of the first sub-group of data;

(c) the size of the data transmission group; and

(d) a size of a header section, the second length indicator being configured to indicate a size of a re-ordered second sub-group of data.

2. The wireless communication device of claim 1, wherein the first sub-group of data is a first service data unit (SDU), the second sub-group of data is a second service data unit (SDU), and the data transmission group is a protocol data unit (PDU).

3. The wireless communication device of claim 1, wherein the size of the first length indicator is based on one of I₁=min (┌

log₂ B┐

, M) or I₁=min (┌

log₂(B−

FH)┐

, M), wherein I₁ represents a field length of the first length indicator, “

B”

represents the size of the data transmission group, M represents a predetermined field length, and ┌

X┐

represents a ceiling function of X and, for all real numbers X, the ceiling function returns the smallest integer not less than X, with ┌

X┐

=min {nε

Z|X≦

n}.

4. The wireless communication device of claim 1, wherein the size of the second length indicator and additional length indicators are calculated based on one of

I_i=┌

log₂ V<sub>i−

1</sub>┐

, 

 

(1)

$\begin{array}{cc}{I}_i=\lceil <br><br>{\log }_2<br><br>A<br><br><br><br>F<br><br><br><br>L\rceil <br><br>=\lceil <br><br>{\log }_2<br><br>\left(B-\underset{j=1}{\overset{i-1}{\sum <br><br>}}<br><br>\left(I_j+V_j\right)-\mathrm{FH}\right)\rceil <br><br>,& \left(2\right)\end{array}$

and (3) the minimum value between (1) and (2), for i≧

2, i being an integer, wherein I_i represents a field length of an i-th length indicator, and “

V<sub>i−

1</sub>”

represents a size of a sub-group immediately before remaining sub-groups.

5. The wireless communication device of claim 1, wherein the wireless communication device is at least one of a user device, a mobile device, a cellular phone, a wireless transmission device, a wireless transmission station, and a portable computer.

6. The wireless communication device of claim 1, wherein

the data receiving interface is further configured to receive at least three sub-groups of data for transmission, the sub-groups of data comprising data contents for providing the at least one communication service;

and

the data processing device is further configured to combine the at least three sub-groups of data as a portion of the data transmission group.

7. The wireless communication device of claim 1, wherein at least one of the first and second services comprises at least one of voice communication, video, data, text, e-mail, or audio services.

8. The wireless communication device of claim 1, wherein the data processing device combines the first and second re-ordered sub-groups of data by multiplexing data from the first and second sub-groups as the data transmission group.

9. A set of instructions recognizable by a wireless communication device, the instructions being processed by the device to perform steps comprising:

receiving a first sub-group of data for transmission, the first sub-group of data comprising data contents for providing at least one communication service;

receiving a second sub-group of data for transmission, the second sub-group of data comprising data contents for providing the at least one communication service;

reordering the sub-groups in a descending order based on sizes of the sub-groups;

combining the first re-ordered sub-group of data and the second re-ordered sub-group of data as a portion of a data transmission group;

providing a size of a first length indicator based at least on a size of the data transmission group, the first length indicator being configured to indicate a size of the first re-ordered sub-group of data; and

providing a size of a second length indicator based on at least one of (1) a size of the first length indicator;

(2) a size of the first sub-group of data;

(3) the size of the data transmission group; and

(4) a size of a header section, the second length indicator being configured to indicate a size of the second re-ordered sub-group of data.

10. The instructions of claim 9, wherein the first sub-group of data is a first service data unit (SDU), the second sub-group of data is a second service data unit (SDU), and the data transmission group is a protocol data unit (PDU).

11. The instructions of claim 9, wherein the size of the first length indicator is based on one of I₁=min (┌

log₂ B┐

, M) or I₁=min (┌

log₂(B−

FH)┐

, M), wherein I₁ represents a field length of the first length indicator, “

B”

represents the size of the data transmission group, M represents a predetermined field length, and ┌

X┐

represents a ceiling function of X and, for all real numbers X, the ceiling function returns the smallest integer not less than X, with ┌

X┐

=min{nε

Z|X≦

n}.

12. The instructions of claim 9, wherein the size of the second length indicator and additional length indicators are calculated based on one of

I_i=┌

log₂ V<sub>i−

1</sub>┐

, 

 

(1)

$\begin{array}{cc}{I}_i=\lceil <br><br>{\log }_2<br><br>A<br><br><br><br>F<br><br><br><br>L\rceil <br><br>=\lceil <br><br>{\log }_2<br><br>\left(B-\underset{j=1}{\overset{i-1}{\sum <br><br>}}<br><br>\left(I_j+V_j\right)-\mathrm{FH}\right)\rceil <br><br>,& \left(2\right)\end{array}$

and (3) the minimum value between (1) and (2), for i≧

2, i being an integer, wherein I_i represents a field length of an i-th length indicator, and “

V<sub>i−

1</sub>”

represents a size of a sub-group immediately before remaining sub-groups.

13. The instructions of claim 9, wherein the instructions are implemented in at least one of a user device, a mobile device, a cellular phone, a wireless transmission device, a wireless transmission station, and a portable computer.

14. The instructions of claim 9, wherein the instructions are capable of configuring the device to perform operations comprising:

receiving at least three sub-groups of data for transmission, the at least three sub-groups of data comprising data contents for providing at least one communication service;

combining the at least three sub-groups of data as a portion of the data transmission group;

15. The instructions of claim 9, wherein at least one of the first and second services comprises at least one of voice communication, video, data, text, e-mail, or audio services.

16. The instructions of claim 9, wherein combining the first sub-group of data and the second sub-group of data as a portion of a data transmission group comprises multiplexing data from the first and second sub-groups as the data transmission group.

17. A method of operating a wireless communication device, the method comprising:

receiving at least two sub-groups of data for transmission, the at least two sub-groups of data comprising data contents for providing at least portions of data for at least a first service and a second service;

combining the at least two sub-groups of data as a portion of the data transmission group;

providing a size of a first length indicator based at least on a size of the data transmission group, the first length indicator being configured to indicate a size of a first sub-group of data; and

providing a size of a second length indicator based on at least one of (1) a size of the first length indicator;

(2) a size of the first sub-group of data;

(3) the size of the data transmission group; and

(4) a size of a header section, the second length indicator being configured to indicate a size of a second sub-group of data.

18. The method of claim 17, wherein the first sub-group of data is a first service data unit (SDU), the second sub-group of data is a second service data unit (SDU), and the data transmission group is a protocol data unit (PDU).

19. The method of claim 17, wherein the size of the first length indicator is based on one of I₁=min (┌

log₂ B┐

, M) or I₁=min (┌

log₂(B−

FH)┐

, M), wherein I₁ represents a field length of the first length indicator, “

B”

represents the size of the data transmission group, M represents a predetermined field length, and ┌

X┐

represents a ceiling function of X and, for all real numbers X, the ceiling function returns the smallest integer not less than X, with ┌

X┐

=min {nε

Z|X≦

n}.

20. The method of claim 17, wherein the size of the second length indicator and additional length indicators are calculated based on one of

I_i=┌

log₂ V<sub>i−

1</sub>┐

, 

 

(1)

$\begin{array}{cc}{I}_i=\lceil <br><br>{\log }_2<br><br>A<br><br><br><br>F<br><br><br><br>L\rceil <br><br>=\lceil <br><br>{\log }_2<br><br>\left(B-\underset{j=1}{\overset{i-1}{\sum <br><br>}}<br><br>\left(I_j+V_j\right)-\mathrm{FH}\right)\rceil <br><br>,& \left(2\right)\end{array}$

and (3) the minimum value between (1) and (2), for i≧

2, i being an integer, wherein I_i represents a field length of an i-th length indicator, and “

V<sub>i−

1</sub>”

represents a size of a sub-group immediately before remaining sub-groups.

21. The method of claim 17, wherein the methods are implemented in at least one of a user device, a mobile device, a cellular phone, a wireless transmission device, a wireless transmission station, and a portable computer.

22. The method of claim 17, wherein the first sub-group of data is larger in size than the second sub-group of data.

23. The method of claim 17 further comprising:

providing a size of a third length indicator based on at least one of (1) the size of the second length indicator;

(2) a size of the second sub-group of data;

(3) the size of the data transmission group; and

(4) the size of a header section, the third length indicator being configured to indicate a size of a third sub-group of data.

24. The method of claim 17 further comprising reordering the at least two sub-groups in a descending order based on the sizes of the at least two sub-groups.

25. The method of claim 17, wherein at least one of the first and second services comprises at least one of voice communication, video, data, text, e-mail, or audio services.

26. The method of claim 17, wherein combining the at least two sub-groups of data comprises multiplexing data from the at least two sub-groups as the data transmission group.