CN101124743A - A method for establishing fast feedback channel and transmitting information in a wireless communication system - Google Patents
A method for establishing fast feedback channel and transmitting information in a wireless communication system Download PDFInfo
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- CN101124743A CN101124743A CNA2005800281752A CN200580028175A CN101124743A CN 101124743 A CN101124743 A CN 101124743A CN A2005800281752 A CNA2005800281752 A CN A2005800281752A CN 200580028175 A CN200580028175 A CN 200580028175A CN 101124743 A CN101124743 A CN 101124743A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0417—Feedback systems
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Abstract
A method of transmitting information in a wireless communication system is disclosed. More specifically, the method includes a base station (BS) which receives data from a mobile subscriber station (MSS) via an uplink channel. Using the received data, the BS determines quality of the uplink channel. Thereafter, the BS transmits feedback information to the MSS. Here, the feedback information is based on the determined quality of the uplink channel.
Description
Technical Field
The present invention relates to a method of establishing a feedback channel and transmitting information, and more particularly, to a method of establishing a fast feedback channel and transmitting information in a wireless communication system having multiple antennas.
Background
In an orthogonal frequency division multiplexing/orthogonal frequency division multiple access (OFDM/OFDMA) system, a Base Station (BS) supporting multiple antennas can obtain a transmit diversity gain by receiving feedback information from a Mobile Subscriber Station (MSS). The feedback information includes a weight value or channel information. Here, the feedback information is transmitted from the MSS to the BS through an uplink transmission high-speed (or fast) feedback channel.
In particular, the feedback information relates to various determination (measurement) information of BS transmission signals. The feedback information provides information necessary for the BS to transmit a more accurate transmission signal. Here, the determination information may include various determination values of the downlink transmission signal. For example, in the case of Multiple Input Multiple Output (MIMO), the determined value of the downlink signal may be a signal-to-noise ratio (S/N) value or a weighted or selected mode value (space-time transmit diversity or spatial multiplexing).
Fig. 1 depicts an example in which an MSS implemented in downlink transmission transmits feedback information including weight values (or channel information) to a BS. As shown in fig. 1, the BS uses a plurality of antennas, and the BS informs an MSS of a Space Time Coding (STC) mode through an STC area IE message. The STC mode is determined based on the number of antennas owned by the BS. Meanwhile, the BS informs the MSS of what matrix type (e.g., type B) the BS plans to use. A Multiple Input Multiple Output (MIMO) Downlink (DL) basic IE message is a means by which the BS informs the MSS what matrix type it plans to use. Further, the BS informs the MSS of a mapping scheme of a weight value to be allocated to the uplink high-speed feedback channel through an enhanced allocation IE message of a Channel Quality Indication Channel (CQICH).
On the other hand, the MSS determines the downlink channel quality or acquires the weighting matrix W based on the downlink channel quality determination. The size of the weight matrix is determined by the number of BS transmission antennas and the number of output signals according to the STC scheme. Equation 1 below is an example of a weighting matrix W with respect to 4 BS transmit antennas and 2 STC outputs.
[ formula 1]
The MSS transmits feedback of the weight matrix W and channel quality information acquired through equation 1 via the CQICH (S12). In order to improve a signal-to-noise ratio (SNR) of the BS at a receiving end, the BS using a plurality of transmission antennas receives downlink determination values or weighting values. Meanwhile, the BS allocates an uplink CQICH to the MSS in order to receive a downlink determination value or a weight value.
In addition, in the existing 802.16OFDMA system, a message of a fast feedback channel of an uplink is allocated to an uplink slot. Here, the uplink slot represents a subchannel region including three symbols, which are composed of 6 tiles (tiles). A slot of the IEEE 802.16OFDMA system refers to a minimum unit available for data allocation, and can be represented in a time domain and a subchannel domain. Also, one tile includes 8 data subcarriers.
Table 1 provided below shows a method of modulating subcarriers of a fast feedback channel. Also, table 2 shows the subcarrier modulation method applied to each vector in table 1.
[ Table 1]
| 4 bits Payload | For each tile, the vector used by the fast feedback channel
Index ( |
| 0b0000 | 0，0，0，0，0，0 |
| 0b0001 | 1，1，1，1，1，1 |
| 0b0010 | 2，2，2，2，2，2 |
| 0b0011 | 3，3，3，3，3，3 |
| 0b0100 | 4，4，4，4，4，4 |
| 0b0101 | 5，5，5，5，5，5 |
| 0b0110 | 6，6，6，6，6，6 |
| 0b0111 | 7，7，7，7，7，7 |
| 0b1000 | 0，1，2，3，4，5 |
| 0b1001 | 1，2，3，4，5，6 |
| 0b1010 | 2，3，4，5，6，7 |
| 0b1011 | 3，4，5，6，7，0 |
| 0b1100 | 4，5，6，7，0，1 |
| 0b1101 | 5，6，7，0，1，2 |
| 0b1110 | 6，7，0，1，2，3 |
| 0b1111 | 7，0，1，2，3，4 |
[ Table 2]
| Vector cable Guiding device | The data subcarrier modulation method for each vector index ( |
| 0 | P0，P1，P2，P3，P0，P1，P2， |
| 1 | P0，P3，P2，P1，P0，P3，P2， |
| 2 | P0，P0，P1，P1，P2，P2，P3，P3 |
| 3 | P0，P0，P3，P3，P2，P2，P1，P1 |
| 4 | P0，P0，P0，P0，P0，P0，P0，P0 |
| 5 | P0，P2，P0，P2，P0，P2，P0，P2 |
| 6 | P0，P2，P0，P2，P2，P0，P2，P0 |
| 7 | P0，P2，P2，P0，P2，P0，P0，P2 |
As shown in table 1 and table 2, the feedback information is represented as a payload in units of four (4) bits, and based on the payload value, vector indices of six (6) patches used in the fast feedback channel can be obtained. Further, eight (8) subcarriers are provided with different modulation values based on each vector index.
The following are equations relating to each modulation scheme (P0, P1, P2, P3) with respect to table 2.
The MSS using multiple antennas has to receive feedback information from the BS in order to achieve transmit diversity. The feedback information includes an uplink determination value (channel information or weight value). However, there is no defined channel that can quickly feed back the BS determination value to the MSS.
Disclosure of Invention
Accordingly, the present invention is directed to a method of establishing a fast feedback channel and transmitting information in a wireless communication system that substantially obviates one or more problems due to limitations and disadvantages of the related art. An object of the present invention is to provide a method of transmitting information in a wireless communication system.
It is another object of the present invention to provide a method of receiving information in a wireless communication system.
It is another object of the present invention to provide a wireless communication system for transmitting information. It is another object of the present invention to provide a method of establishing a fast feedback channel and transmitting information.
It is another object of the present invention to provide a method for receiving transmitted information through the established fast feedback channel.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, there is provided a method of transmitting information in a wireless communication system including a Base Station (BS) that receives data from a Mobile Subscriber Station (MSS) through an uplink channel. Using the received data, the BS determines the quality of the uplink channel. Thereafter, the BS transmits feedback information to the MSS. Here, the feedback information is based on the determined quality of the uplink channel. In other aspects of the present invention, a method of transmitting information in a wireless communication system including a Base Station (BS) that allocates physical resources of a downlink fast feedback channel is provided. Here, the physical resource of the downlink fast feedback channel is different from that of the data channel. Further, the BS establishes a modulation mode for the downlink fast feedback channel of the BS, the modulation mode corresponding to the feedback information. In addition, the BS transmits a modulation mode to a Mobile Subscriber Station (MSS), the modulation mode corresponding to the feedback information, so that the MSS can determine the feedback information transmitted from the BS through the modulation mode.
In another aspect of the present invention, there is provided a method of receiving information in a wireless communication system including a Mobile Subscriber Station (MSS) that transmits data to a Base Station (BS) through an uplink channel. Thereafter, the MSS receives feedback information from the BS. Here, the feedback information is based on the quality of the uplink channel, which is determined based on the transmitted data. In another aspect of the present invention, there is provided a method of receiving information in a wireless communication system including a Mobile Subscriber Station (MSS) that receives and detects a modulation mode transmitted from a Base Station (BS). Here, a modulation mode is established for the downlink fast feedback channel, and it is important that the modulation mode corresponds to the feedback information. Further, the MSS determines feedback information transmitted from the BS through the modulation mode. After determining to transmit the feedback information from the BS, the MSS transmits uplink data, which is configured by using the feedback information.
It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention.
Fig. 1 depicts an example in which a mobile subscriber station transmits feedback information including weight values (or channel information) acquired in downlink transmission to a base station;
fig. 2 depicts an example of a BS transmitting feedback information to an MSS in an OFDM/OFDMA system, the feedback information including a result of an uplink channel quality assessment, according to an embodiment of the present invention;
fig. 3 depicts an example of setting the determined uplink value to the designated physical resource of the fast feedback channel;
fig. 4 depicts an example of an IE message format for a downlink high speed feedback channel using extended DIUC;
fig. 5 depicts an example of an IE message format for a downlink high speed feedback channel using OFDMA DIUC values;
fig. 6 is an example describing the format of a CQICH DL location IE message including weight values and channel information of a BS;
fig. 7 is a structural example of a wireless communication system describing an operation of transmitting/receiving information between a BS and an MSS;
FIG. 8 depicts an example of a basic allocation unit of a fast feedback channel in a mode of subchannel downlink Partial Usage (PUSC);
FIG. 9 depicts an example of a basic allocation unit of a fast feedback channel in a subchannel downlink Full Use (FUSC) mode;
fig. 10 depicts an example of the composition of data subcarriers;
fig. 11 depicts an example of the composition of data subcarriers.
Detailed Description
Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. Embodiments of the present invention may be applied to an orthogonal frequency division multiplexing/orthogonal frequency division multiple access (OFDM/OFDMA) system, and may also be applied to wireless communication systems of other standards. Examples relating to embodiments of the present invention are provided below.
In an embodiment of the present invention, a Base Station (BS) transmits feedback information to a Mobile Subscriber Station (MSS) through a fast (or high speed) downlink feedback channel. The feedback information includes Channel Quality Information (CQI) and weighting values received through an uplink channel. In operation, the BS informs the MSS of a fast downlink feedback channel used to transmit data. Thereafter, the BS establishes CQI or weight values for the fast downlink feedback channel and transmits the information to the MSS.
Preferably, the informing of the fast downlink feedback channel to the MSS is performed through a DIUC message or a Downlink (DL) fast feedback channel IE message. Here, the CQI or weighted value is transmitted through a CQI channel (CQICH) DL location IE message.
Fig. 2 depicts an example in which a BS transmits feedback information including a result of uplink channel quality estimation to an MSS in an OFDM/OFDMA system according to an embodiment of the present invention. In fig. 2, the BS allocates the STC mode to the MSS through the STC area IE message based on the number of BS transmission antennas, as described above. Meanwhile, the MSS acquires a weighting matrix (W = N) t xM t ). The weight matrix is derived from the STC scheme based on the number of BS transmit antennas and the number of output signals. Also, the BS allocates an uplink high speed feedback channel, also referred to as CQICH, to the MSS.
Subsequently, the MSS informs the BS of the weight matrix (W = N) via the allocated CQICH t x M t ) As a result, the BS can obtain a transmit diversity gain by receiving the weight value of each channel from the MSS. However, in order for an MSS using multiple antennas to obtain a transmit diversity gain, the MSS has to receive feedback information on an uplink channel quality value (channel information or weighting value) from the BS. In other words, after performing these steps (S10-S13) and the BS receives the downlink channel quality assessment values (channel information or weighted values) from the MSS, the BS transmits feedback information regarding the uplink channel quality assessment values (channel information or weighted values) to the MSS.
Further, the BS informs the MSS of the high speed downlink feedback channel using the DIUC or DL fast feedback channel IE message (S14). As shown in fig. 3, the BS transmits an uplink channel quality assessment value (channel information or weight value) to the MSS at a designated specific location (or space) of a high speed downlink feedback channel (S15).
Fig. 4 and 5 describe examples of formats of IE messages for a BS to notify an MSS of a high speed downlink feedback channel. Here, fig. 4 is an example of using the extended DIUC, and fig. 5 is an example of using the OFDMA DIUC value.
Further, fig. 6 depicts an example of a format of a CQICH DL location IE message including weight values and channel information of the BS. Here, each CQICH location IE occupies one Downlink (DL) slot, and as shown in fig. 3, DIUC =14 or DL fast feedback channel IE is allocated to the high speed downlink feedback channel.
Fig. 7 is an example of a structure of a wireless communication system describing an operation of transmitting/receiving information between a BS and an MSS. More specifically, the BS receives data from the MSS via the uplink channel through the receiver 21 to determine the quality of the uplink channel through the controller 20. The BS may receive, for example, data and other types of data and information from which the channel state and/or quality may be determined. The BS may then send feedback information to the MSS using transmitter 22. Here, the feedback information is based on the determined quality of the uplink channel.
To perform communication, the MSS first transmits data to the BS through the transmitter 14. After the controller 20 of the BS determines the quality of the uplink channel and transmits via the transmitter 22, the receiver 13 of the MSS receives feedback information from the BS.
Another embodiment of the present invention relates to allocating physical channel space to provide a feedback channel in a downlink direction, and a subcarrier modulation method defining the feedback channel so that a BS can transmit feedback information including quality information and weight values received in uplink transmission to an MSS through the defined feedback channel.
Fig. 8 depicts an example of a basic allocation unit of a fast feedback channel in a mode of subchannel downlink Partial Usage (PUSC). Fig. 9 depicts an example of a basic allocation unit of a fast feedback channel in a subchannel downlink Full Use (FUSC) mode. In the IEEE 802.26OFDMA system, downlink frames basically provide PUSC and FUSC modes.
The PUSC mode provides a permutation scheme whereby only a portion of the subchannels are used in transmitting data. As shown in fig. 8, a slot of the PUSC mode represents a subchannel composed of two symbols and four clusters (clusters). Further, each cluster has 12 data subcarriers.
The FUSC mode provides a permutation scheme whereby all or all of the subchannels are used in transmitting data. As shown in fig. 9, a slot of the FUSC mode represents a subchannel including one symbol and 48 data subcarriers, as in the PUSC mode. Further, in both PUSC mode and FUSC mode, each slot has 48 data subcarriers.
In the present embodiment, one slot is allocated to the fast feedback channel in the downlink direction as a case in the fast feedback channel in the downlink direction. In other words, the time slots indicated in fig. 1 and 2 may be represented as basic allocation units of a physical channel space of the fast feedback channel. Since the PUSC mode and the FUSC mode each include 48 data subcarriers, the same modulation method can be employed despite the difference in form between the two modes. Fig. 10 and 11 depict examples of the composition of data subcarriers. In fig. 10 and 11, the data subcarriers may be divided into 6 small groups (groups). Further, each subgroup includes 8 subcarriers. By adopting this arrangement, the downlink fast feedback channel can use the composition of the uplink fast feedback channel. Table 3 describes a subcarrier modulation method of a feedback channel according to an embodiment of the present invention.
[ Table 3]
| 4 bits Payload | For each small group, the direction used by the fast feedback channel
Quantity index ( |
| |
0，0，0，0，0，0 |
| |
1，1，1，1，1，1 |
| |
2，2，2，2，2，2 |
| 0b0011 | 3，3，3，3，3，3 |
| 0b0100 | 4，4，4，4，4，4 |
| 0b0101 | 5，5，5，5，5，5 |
| 0b0110 | 6，6，6，6，6，6 |
| 0b0111 | 7，7，7，7，7，7 |
| |
0，1，2，3，4，5 |
| |
1，2，3，4，5，6 |
| |
2，3，4，5，6，7 |
| |
3，4，5，6，7，0 |
| |
4，5，6，7，0，1 |
| |
5，6，7，0，1，2 |
| |
6，7，0，1，2，3 |
| |
7，0，1，2，3，4 |
In table 3, the sequential combination of vector indices according to the payload and the minor groups (0-5) can be changed. Table 4 below shows the data subcarrier modulation method for each vector of table 3.
[ Table 4]
| Vector cable Guiding device | Data subcarrier modulation technique per vector index ( |
| 0 | P0，P1，P2，P3，P0，P1，P2， |
| 1 | P0，P3，P2，P1，P0，P3，P2， |
| 2 | P0，P0，P1，P1，P2，P2，P3，P3 |
| 3 | P0，P0，P3，P3，P2，P2，P1，P1 |
| 4 | P0，P0，P0，P0，P0，P0，P0，P0 |
| 5 | P0，P2，P0，P2，P0，P2，P0，P2 |
| 6 | P0，P2，P0，P2，P2，P0，P2，P0 |
| 7 | P0，P2，P2，P0，P2，P0，P0，P2 |
According to embodiments of the present invention, fast feedback channel modulation may use various modulation techniques, such as Binary Phase Shift Keying (BPSK), quadrature Phase Shift Keying (QPSK), and 16 quadrature amplitude modulation (16 QAM). Each modulation technique (P0, P1, P2, P3) of table 4 shows an example of a QPSK technique applied to the OFDM/OFDMA system. Further, the modulation order combination according to each vector index in table 4 may be changed.
In order to describe another operation of transmitting/receiving information between a BS and an MSS in a wireless communication system for transmitting information, the operation will be explained using the structure in fig. 7 and its numerical reference. In operation, the controller 20 of the BS allocates physical resources for the downlink fast feedback channel and establishes a modulation mode for the downlink fast feedback channel by the BS. Here, the physical resources of the downlink fast feedback channel are different from those of the data channel, and the modulation mode corresponds to the feedback information. Thereafter, the transmitter 22 of the BS transmits the modulation pattern to the MSS.
At the MSS, the receiver 13 receives a modulation pattern transmitted from a Base Station (BS). Here, the controller 20 of the BS establishes a modulation mode for the downlink fast feedback channel, which corresponds to the feedback information. Upon reception, the controller 10 of the MSS detects a modulation mode transmitted from the BS and determines feedback information transmitted from the BS through the modulation mode. After determining the feedback information, the transmitter 14 of the MSS transmits uplink data, which has been configured by using the feedback information, to the BS.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (46)
1. A method of transmitting information in a wireless communication system, the method comprising:
receiving data from a Mobile Subscriber Station (MSS) through an uplink channel;
determining a quality of an uplink channel based on data received through a Base Station (BS);
feedback information is sent to the MSS, wherein the feedback information is based on the determined quality of the uplink channel.
2. The method of claim 1, wherein the feedback information comprises Channel Quality Information (CQI) of an uplink channel.
3. The method of claim 1, wherein the feedback information includes weighting values.
4. The method of claim 1, wherein the feedback information comprises a combination of Channel Quality Information (CQI) and weighting values.
5. The method of claim 1, wherein the feedback information is transmitted through a downlink fast feedback channel.
6. The method of claim 1, wherein the feedback information is transmitted via data bursts.
7. The method of claim 1, wherein the feedback information is transmitted through a Medium Access Channel (MAC) message.
8. A method of receiving information in a wireless communication system, the method comprising:
transmitting data to a Base Station (BS) through an uplink channel;
receiving feedback information from the BS, wherein the feedback information is based on a quality of an uplink channel, and wherein the quality of the uplink channel is determined based on the transmitted data.
9. The method of claim 8, wherein the feedback information includes Channel Quality Information (CQI) of an uplink channel.
10. The method of claim 8, wherein the feedback information includes weighting values.
11. The method of claim 8, wherein the feedback information comprises a combination of Channel Quality Information (CQI) and weighting values.
12. The method of claim 8, wherein the feedback information is transmitted through a downlink feedback channel.
13. The method of claim 8, wherein the feedback information is transmitted through a data burst.
14. The method of claim 8, wherein the feedback information is transmitted through a Medium Access Channel (MAC) message.
15. A method of transmitting and receiving information in a wireless communication system, the method comprising:
transmitting data to a Base Station (BS) by a Mobile Subscriber Station (MSS) via an uplink channel;
receiving data transmitted from the MSS via an uplink channel;
determining a quality of an uplink channel based on data received by the BS;
transmitting, by the BS, feedback information to the MSS, wherein the feedback information is based on the determined quality of the uplink channel;
receiving feedback information transmitted from the BS.
16. The method of claim 15, wherein the feedback information includes Channel Quality Information (CQI) of an uplink channel.
17. The method of claim 15, wherein the feedback information includes weighting values.
18. The method of claim 15, wherein the feedback information includes a combination of Channel Quality Information (CQI) and weight values.
19. The method of claim 15, wherein the feedback information is transmitted through a downlink fast feedback channel.
20. The method of claim 15, wherein the feedback information is transmitted through a data burst.
21. The method of claim 15, wherein the feedback information is transmitted through a Medium Access Channel (MAC) message.
22. A wireless communication system for transmitting information, the system comprising a Base Station (BS) comprising:
a receiver for receiving data from a mobile communication station (MSS) via an uplink channel;
a controller for determining quality of an uplink channel based on data received by the BS;
a transmitter for transmitting feedback information to the MSS, wherein the feedback information is based on the determined quality of the uplink channel.
23. A wireless communication system for receiving information, the system comprising a mobile communication station (MSS) including:
a transmitter for transmitting data to a Base Station (BS) via an uplink channel;
a receiver for receiving feedback information from a BS, wherein the feedback information is based on a quality of an uplink channel, and wherein the quality of the uplink channel is determined based on the transmitted data.
24. A method of transmitting information in a wireless communication system, the method comprising:
allocating, by a Base Station (BS), physical resources for a downlink fast allocation channel, wherein the physical resources for the downlink fast feedback channel are different from physical resources for a data channel;
establishing, by a BS, a modulation mode for a downlink fast feedback channel, wherein the modulation mode corresponds to feedback information;
transmitting the modulation mode to a Mobile Subscriber Station (MSS).
25. The method of claim 24, further comprising receiving data from the MSS, wherein the uplink data is configured by using feedback information.
26. The method of claim 24, wherein the modulation pattern is comprised of subcarriers.
27. The method of claim 24, wherein the location of the downlink fast feedback channel is notified to the MSS by the BS.
28. The method of claim 24, wherein the size of the downlink fast feedback channel is notified to the MSS by the BS.
29. The method of claim 24, wherein the modulation patterns have orthogonal relationships to each other.
30. The method of claim 24, wherein the feedback information comprises Channel Quality Information (CQI).
31. The method of claim 24, wherein the feedback information includes weighting values.
32. The method of claim 24, wherein the feedback information comprises a combination of Channel Quality Information (CQI) and weighting values.
33. A method of receiving information in a wireless communication system, the method comprising:
receiving and detecting a modulation mode transmitted from a Base Station (BS), wherein the modulation mode for a downlink fast feedback channel is established and corresponds to feedback information;
determining what feedback information is transmitted from the BS through the modulation mode;
transmitting uplink data, wherein the uplink data is configured by using the feedback information.
34. The method of claim 33, wherein the feedback information comprises Channel Quality Information (CQI).
35. The method of claim 33, wherein the feedback information includes weighting values.
36. The method of claim 33, wherein the feedback information comprises a combination of Channel Quality Information (CQI) and weighting values.
37. A method of transmitting and receiving information in a wireless communication system, the method comprising:
allocating, by a Base Station (BS), physical resources for a downlink fast feedback channel, wherein the physical resources for the downlink fast feedback channel are different from physical resources for a data channel;
establishing, by a BS, a modulation mode for a downlink fast feedback channel, wherein the modulation mode corresponds to feedback information;
transmitting the modulation mode to a Mobile Subscriber Station (MSS);
receiving and detecting a modulation mode transmitted from a Base Station (BS), wherein the modulation mode for a downlink fast feedback channel is established and corresponds to feedback information;
determining what feedback information is transmitted from the BS via the modulation mode;
transmitting uplink data, wherein the uplink data is configured by using the feedback information.
38. The method of claim 37, wherein the modulation pattern is comprised of subcarriers.
39. The method of claim 37, wherein the BS informs the MSS of the location of the downlink fast feedback channel.
40. The method of claim 37, wherein the BS informs the MSS of a size of a downlink fast feedback channel.
41. The method of claim 37, wherein said modulation patterns have orthogonal relationships to each other.
42. The method of claim 37, wherein the feedback information comprises Channel Quality Information (CQI).
43. The method of claim 37, wherein the feedback information includes weighting values.
44. The method of claim 37, wherein the feedback information includes a combination of Channel Quality Information (CQI) and weighting values.
45. A wireless communication system for transmitting information, the system comprising a Base Station (BS) comprising:
a controller for allocating, by a Base Station (BS), physical resources for a downlink fast feedback channel and establishing, by the BS, a modulation mode for the downlink fast feedback channel, wherein the physical resources for the downlink fast feedback channel are different from physical resources for a data channel, and the modulation mode corresponds to feedback information;
a transmitter for transmitting the modulation mode to a Mobile Subscriber Station (MSS).
46. A wireless communication system for receiving information, the system comprising a Mobile Subscriber Station (MSS), the Mobile Subscriber Station (MSS) comprising:
a receiver for receiving a modulation mode transmitted from a Base Station (BS), wherein a modulation mode for a downlink fast feedback channel is established and the modulation mode corresponds to feedback information;
a controller for detecting a modulation pattern transmitted from the BS and determining feedback information transmitted from the BS through the modulation pattern;
a transmitter for transmitting uplink data, wherein the uplink data is configured by using the feedback information.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2004-0064542 | 2004-08-17 | ||
| KR1020040064542A KR20060016184A (en) | 2004-08-17 | 2004-08-17 | Method for setting fast feedback channel of ofdm/ofdma system |
| KR1020040064553 | 2004-08-17 | ||
| KR1020040064553A KR20060016193A (en) | 2004-08-17 | 2004-08-17 | Method for supporting transmission diversity of mobile station in multiple antenna system |
| KR1020040064542 | 2004-08-17 | ||
| KR10-2004-0064553 | 2004-08-17 | ||
| PCT/KR2005/002703 WO2006019263A2 (en) | 2004-08-17 | 2005-08-17 | A method for establishing fast feedback channel and transmitting information in a wireless communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101124743A true CN101124743A (en) | 2008-02-13 |
| CN101124743B CN101124743B (en) | 2011-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2005800281752A Expired - Fee Related CN101124743B (en) | 2004-08-17 | 2005-08-17 | A method and system for establishing fast feedback channel and transmitting information in a wireless communication system |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR20060016193A (en) |
| CN (1) | CN101124743B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102648588A (en) * | 2009-10-09 | 2012-08-22 | 瑞典爱立信有限公司 | Methods and devices for uplink diversity transmission |
| CN102907144A (en) * | 2010-05-26 | 2013-01-30 | 索尼公司 | Wireless communication apparatus, base station, wireless communication method, and wireless communication system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6968201B1 (en) * | 1999-10-06 | 2005-11-22 | Lucent Technologies, Inc. | Method and apparatus for controlling reverse link interference rise and power control instability in a wireless system |
| US6996069B2 (en) * | 2000-02-22 | 2006-02-07 | Qualcomm, Incorporated | Method and apparatus for controlling transmit power of multiple channels in a CDMA communication system |
| WO2003061158A1 (en) * | 2002-01-16 | 2003-07-24 | Mitsubishi Denki Kabushiki Kaisha | Base station and mobile station and communication system and base station communication method and base station communication program and mobile station communication method and mobile station communication program |
-
2004
- 2004-08-17 KR KR1020040064553A patent/KR20060016193A/en not_active Application Discontinuation
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2005
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102648588A (en) * | 2009-10-09 | 2012-08-22 | 瑞典爱立信有限公司 | Methods and devices for uplink diversity transmission |
| US9025477B2 (en) | 2009-10-09 | 2015-05-05 | Telefonaktiebolaget L M Ericsson (Publ) | Methods and devices for uplink diversity transmission |
| US9407341B2 (en) | 2009-10-09 | 2016-08-02 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and devices for uplink diversity transmission |
| CN102907144A (en) * | 2010-05-26 | 2013-01-30 | 索尼公司 | Wireless communication apparatus, base station, wireless communication method, and wireless communication system |
| CN102907144B (en) * | 2010-05-26 | 2015-11-25 | 索尼公司 | Radio communication device, base station, wireless communications method and wireless communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20060016193A (en) | 2006-02-22 |
| CN101124743B (en) | 2011-07-20 |
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