CN101873206B - Method, device and system for feeding back channel information - Google Patents
Method, device and system for feeding back channel information Download PDFInfo
- Publication number
- CN101873206B CN101873206B CN 200910082972 CN200910082972A CN101873206B CN 101873206 B CN101873206 B CN 101873206B CN 200910082972 CN200910082972 CN 200910082972 CN 200910082972 A CN200910082972 A CN 200910082972A CN 101873206 B CN101873206 B CN 101873206B
- Authority
- CN
- China
- Prior art keywords
- channel information
- multiple carrier
- subscriber equipment
- carrier channel
- rule
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000000969 carrier Substances 0.000 claims abstract description 91
- 238000012545 processing Methods 0.000 claims abstract description 68
- 230000005540 biological transmission Effects 0.000 claims description 62
- 230000011664 signaling Effects 0.000 claims description 18
- 238000013507 mapping Methods 0.000 claims description 7
- 239000011159 matrix material Substances 0.000 claims description 4
- 238000001228 spectrum Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000001174 ascending effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000007774 longterm Effects 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 3
- 238000004220 aggregation Methods 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000010363 phase shift Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a method, a device and a system for feeding back channel information, which are applied to a system comprising a base station and user equipment. The method comprises the following steps that: the user equipment combines channel information of at least two downlink carriers which are transmitted at the same uplink subframe position to generate multi-carrier channel information; the user equipment performs baseband processing on the multi-carrier channel information; and the user equipment sends the multi-carrier channel information after the baseband processing to the base station through an uplink channel. The method, device and system effectively save the feedback expense of the channel information.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly relate to a kind of channel information feedback method, device and system.
Background technology
Along with development of Communication Technique, the mobile service capacity is exponential increase, needs high speed business to satisfy the user's request that continues to increase, and higher peak rate and the cell throughout of high speed business and application need.In order to improve the average throughput of peak rate and sub-district, communication system need be supported bigger system bandwidth.
Because the finiteness of frequency spectrum resource, multicarrier system can make continuous or discontinuous being distributed on the frequency spectrum resource of a plurality of carrier waves by carrier aggregation technology when distributing frequency spectrum resource, to satisfy bigger bandwidth demand.At present, the multicarrier system preliminary definition system bandwidth of 100MHz, this system bandwidth is divided into several carrier waves, each carrier widths is that 5MHz to 20MHz does not wait, and compatible existing LTE (the Long Term Evolution of the characteristic of each carrier wave, Long Term Evolution) technical characterstic meets the basic demand in the LTE standard.For example, LTE-Advanced (Long Term Evolution Advanced, the enhancement mode Long Term Evolution) system can make the LTE-Advanced terminal can receive the transmission of a plurality of carrier waves simultaneously when descending employing carrier aggregation technology, and the bandwidth of support is greater than 20MHz.
In the LTE system, terminal is according to the cycle and the default rule of the high-rise configuration in base station, on ascending control channel to base station feedback channel information periodically.The base station obtains the channel information of system bandwidth or part bandwidth by receiving the channel information of self terminal.The channel information that terminal sends comprises RI (RankIndicator, the order indication) information, subband CQI (Channel Quality Indicator, the channel quality indication) information and broadband CQI/PMI (Precoding Matrix Indicator, the pre-coding matrix indication) information, the obtain granularity of channel information on frequency domain is least unit with the subband.
In the prior art, RI information, subband CQI information and broadband CQI/PMI information are taken turns to feed back, promptly in certain time interval feedback broadband CQI/PMI information; According to system requirements feedback subband CQI information, this subband CQI information obtains according to broadband P MI information calculations between 2 broadband CQI/PMI information, and and the broadband CQI/PMI information of feedback between have certain offset; In the integral multiple feedback RI of the feedback cycle of broadband CQI/PMI information information, there is certain offset between this RI information and the broadband CQI/PMI information, if the feedback of RI information is conflicted priority feedback RI information then mutually with the feedback of broadband CQI/PMI information.Position concrete between above-mentioned RI information, subband CQI information and the broadband CQI/PMI information concerns, is indicated to terminal by high-level signaling by the base station.
As shown in Figure 1, be a kind of channel information feedback method schematic diagram of the prior art, wherein, RI represents RI information, and WB represents broadband CQI/PMI information, and FS represents subband CQI information.1 broadband CQI/PMI information of per 8 sub-frame of uplink feedback is promptly in the 1st sub-frame of uplink, the 9th sub-frame of uplink and the 17th sub-frame of uplink feedback broadband CQI/PMI information; 3 subband CQI information of feedback between per two broadband CQI/PMI information, and differ 2 sub-frame of uplink between subband CQI information and the broadband CQI/PMI information; 1 RI information of per 16 sub-frame of uplink feedback, and differ 1 sub-frame of uplink between RI information and the broadband CQI/PMI information.
The reporting types of channel information comprises following 4 kinds: report subband CQI information, report broadband CQI/PMI information, report RI information and report broadband CQI information.Multiple reporting types can be included in same a kind of feedback model of channel information, adopts the method for time-division to transmit with the different reporting types in a kind of feedback model.In the existing feedback of channel information flow process, terminal pins is carried out chnnel coding to the channel information (expense is less than 13bits) of every kind of reporting types, and channel information is encoded to 20bits, and the coded message with 20bits sends to corresponding base station again.
The inventor is in realizing process of the present invention, and there are the following problems at least to find prior art:
Owing to the channel information of feedback need be encoded to 20bits, and a kind of channel information of reporting types is only transmitted in a sub-frame of uplink position, when the less channel information of feedback overhead (for example, the RI information of 2bits or the CQI information of 4bits), can cause expense waste to a certain degree.In addition, in the multicarrier system that adopts carrier aggregation technology, the carrier wave of a plurality of polymerizations adopts different transmission modes, the feedback of channel information pattern that different transmission modes is corresponding different does not have suitable feedback of channel information pattern to support a plurality of polymerization carrier waves with different transmission mode simultaneously in the prior art.
Summary of the invention
The embodiment of the invention provides a kind of channel information feedback method, device and system, has saved the expense of feedback channel information.
The embodiment of the invention proposes a kind of channel information feedback method, is applied to comprise in the system of base station and subscriber equipment, said method comprising the steps of:
Described subscriber equipment is united the channel information at least two descending carriers of same sub-frame of uplink location transmission, generates multiple carrier channel information;
Described subscriber equipment carries out Base-Band Processing to described multiple carrier channel information;
Described subscriber equipment sends to described base station by the multiple carrier channel information of up channel after with described Base-Band Processing.
Preferably, described subscriber equipment is united the channel information at least two descending carriers of same sub-frame of uplink location transmission, generates multiple carrier channel information, comprising:
Described subscriber equipment directly merges the channel information of described two descending carriers in same sub-frame of uplink location transmission at least, generates described multiple carrier channel information; Or
Described subscriber equipment carries out differential cascade to the channel information of described at least two descending carriers in same sub-frame of uplink location transmission, generates described multiple carrier channel information.
Preferably, described subscriber equipment carries out differential cascade to the channel information at least two descending carriers of same sub-frame of uplink location transmission, generates described multiple carrier channel information, comprising:
Described subscriber equipment from described at least two descending carriers of same sub-frame of uplink location transmission channel information the selection reference carrier wave, descending carrier except that described reference carrier in described at least two descending carriers as non-reference carrier, is obtained the reference channel information of described reference carrier correspondence;
Described subscriber equipment obtains the difference information between described non-reference carrier and the described reference carrier;
Described subscriber equipment carries out cascade to described reference channel information and described difference information, generates described multiple carrier channel information.
Preferably, the mean value of the channel information of the described reference channel information channel information that is described reference carrier or described at least two descending carriers in same sub-frame of uplink location transmission.
Preferably, the described channel information that carries out at least two descending carriers of differential cascade is the channel information of same type.
Preferably, described subscriber equipment is united the channel information at least two descending carriers of same sub-frame of uplink location transmission, generates before the multiple carrier channel information, also comprises:
Described base station agreement multiple carrier channel information create-rule;
Described subscriber equipment is notified with described multiple carrier channel information create-rule in described base station.
Preferably, described base station is specially multiple carrier channel information create-rule notifying user equipment:
Described base station sends high-level signaling or control signaling to described subscriber equipment, all carries described multiple carrier channel information create-rule in described high-level signaling and the described control signaling.
Preferably, described subscriber equipment is united the channel information at least two descending carriers of same sub-frame of uplink location transmission, generates before the multiple carrier channel information, also comprises:
Described base station and described subscriber equipment are arranged multiple carrier channel information create-rule jointly.
Preferably, described subscriber equipment is united the channel information at least two descending carriers of same sub-frame of uplink location transmission, generates before the multiple carrier channel information, also comprises:
Described subscriber equipment agreement multiple carrier channel information create-rule;
Described subscriber equipment reports described multiple carrier channel information create-rule to described base station.
Preferably, described subscriber equipment sends to after the described base station by the multiple carrier channel information of up channel after with described Base-Band Processing, also comprises:
The multiple carrier channel information of described base station after to the described Base-Band Processing that receives is carried out channel-decoding;
Described base station obtains the channel information of different descending carriers in the described multiple carrier channel information according to described multiple carrier channel information create-rule.
Preferably, described multiple carrier channel information create-rule comprises at least one in the following content:
The content of the ordinal relation in the described multiple carrier channel information between the channel information of different descending carriers, the selective rule of described reference carrier and described reference channel information.
Preferably, the channel information of described descending carrier comprises at least one item in the following content:
Sub-band channel quality indication CQI information, order indication RI information, broadband CQI information and broadband pre-coding matrix indication PMI information.
Preferably, the size of described multiple carrier channel information is not more than 13 bits.
The embodiment of the invention also proposes a kind of subscriber equipment, comprising:
Generation module is used to unite the channel information at least two descending carriers of same sub-frame of uplink location transmission, generates multiple carrier channel information;
Baseband processing module electrically connects with described generation module, is used for the described multiple carrier channel information that described generation module generates is carried out Base-Band Processing;
Sending module electrically connects with described baseband processing module, and the multiple carrier channel information after being used for by up channel described baseband processing module being handled sends to the base station.
Preferably, described generation module also is used for the channel information of described at least two descending carriers in same sub-frame of uplink location transmission is directly merged, and generates described multiple carrier channel information; Or
Channel information to described at least two descending carriers in same sub-frame of uplink location transmission carries out differential cascade, generates described multiple carrier channel information.
Preferably, described generation module comprises:
The chooser module, be used for from described at least two descending carrier selection reference carrier waves at same sub-frame of uplink location transmission channel information, descending carrier except that described reference carrier in described at least two descending carriers as non-reference carrier, is obtained the reference channel information of described reference carrier correspondence;
Obtain submodule, electrically connect, be used to obtain the difference information between described non-reference carrier and the described reference carrier with described chooser module;
Generate submodule, electrically connect, be used for described reference channel information and described difference information are carried out cascade, generate described multiple carrier channel information with described chooser module and the described submodule that obtains.
Preferably, described subscriber equipment also comprises:
The agreement module electrically connects with described generation module, is used to arrange multiple carrier channel information create-rule, generates described multiple carrier channel information for described generation module;
Reporting module electrically connects with described agreement module, is used for reporting to described base station the described multiple carrier channel information create-rule of described agreement module agreement.
The embodiment of the invention also proposes a kind of base station, comprising:
First acquisition module is used to obtain multiple carrier channel information create-rule;
Receiver module is used to receive the multiple carrier channel information from after the Base-Band Processing of subscriber equipment;
Decoder module electrically connects with described receiver module, and the multiple carrier channel information after the described Base-Band Processing that is used for described receiver module is received is carried out channel-decoding;
Second acquisition module electrically connects with described first acquisition module and described decoder module, is used for the multiple carrier channel information create-rule that obtains according to described first acquisition module, obtains the channel information of different descending carriers in the described multiple carrier channel information.
Preferably, described first acquisition module comprises:
About stator modules is used to arrange described multiple carrier channel information create-rule; And/or
Receive submodule, be used to receive described multiple carrier channel information create-rule from described subscriber equipment.
Preferably, described base station also comprises:
Notification module electrically connects with described first acquisition module, is used for notifying described subscriber equipment with the multiple carrier channel information create-rule of described agreement.
The embodiment of the invention also proposes a kind of feedback of channel information system, comprising:
Subscriber equipment, be used to unite channel information at least two descending carriers of same sub-frame of uplink location transmission, generate multiple carrier channel information, described multiple carrier channel information is carried out Base-Band Processing, send to the base station by the multiple carrier channel information of up channel after with described Base-Band Processing.
The base station is used to receive the multiple carrier channel information from after the described Base-Band Processing of described subscriber equipment, and described multiple carrier channel information is carried out channel-decoding, obtains the channel information of different descending carriers in the described multiple carrier channel information.
Preferably, described subscriber equipment also is used to arrange multiple carrier channel information create-rule, reports the multiple carrier channel information create-rule of described agreement to described base station.
Preferably, described base station also is used to arrange multiple carrier channel information create-rule, notifies described subscriber equipment with the multiple carrier channel information create-rule of described agreement.
The technical scheme of the embodiment of the invention has the following advantages, because channel information at least two descending carriers of same sub-frame of uplink position associating, generate multiple carrier channel information, and this multiple carrier channel information is sent to the base station, saved the feedback overhead of channel information effectively.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a kind of channel information feedback method schematic diagram of the prior art;
Fig. 2 is a kind of channel information feedback method flow chart in the embodiment of the invention one;
Fig. 3 is a kind of channel information feedback method flow chart in the embodiment of the invention two;
Fig. 4 is a kind of channel information feedback method flow chart in the embodiment of the invention three;
Fig. 5 is a kind of user device architecture schematic diagram in the embodiment of the invention four;
Fig. 6 is a kind of architecture of base station schematic diagram in the embodiment of the invention five;
Fig. 7 is a kind of feedback of channel information system configuration schematic diagram in the embodiment of the invention six.
Embodiment
The embodiment of the invention is applied to comprise the multicarrier system of base station and subscriber equipment, wherein, subscriber equipment adopts the mode of directly merging or differential cascade, channel information at least two descending carriers of same sub-frame of uplink position associating, generate multiple carrier channel information, and multiple carrier channel information carried out Base-Band Processing, the multiple carrier channel information after the Base-Band Processing is sent to the base station.
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
As shown in Figure 2, a kind of channel information feedback method flow chart in the embodiment of the invention one may further comprise the steps:
The channel information of descending carrier comprises at least one in the following content: subband CQI information, RI information, broadband CQI information and broadband P MI information.In the multicarrier system, the carrier wave of a plurality of polymerizations can adopt different transmission modes, and different transmission modes need be supported by different feedback of channel information patterns, can comprise multiple reporting types in every kind of feedback of channel information pattern.As shown in table 1, in PUCCH (Physical Uplink Control Channel, Physical Uplink Control Channel), the expense of the reporting types that every kind of feedback of channel information pattern comprises.
The expense table of the reporting types that every kind of feedback model of table 1 comprises
Wherein, NA represents not report, and L represents positional information.Be limited to 13bits on the expense of channel information in PUCCH, the expense upper limit of channel information in PUSCH (Physical Uplink Shared Channe, Physical Uplink Shared Channel) is greater than 13bits.
Because different carrier can adopt similar and different feedback of channel information pattern, subscriber equipment can be united the channel information of a plurality of descending carriers in same sub-frame of uplink position, generates the multiple carrier channel information that is not more than 13 bits.For example, descending carrier 1 is in the RI information of the 0th frame feedback 2bits, descending carrier 2 also in the RI information of the 0th frame feedback 2bits, can unite the RI information of descending carrier 1 and descending carrier 2 feedbacks at the 0th frame, generates the multiple carrier channel information of 4bits by subscriber equipment.Subscriber equipment also can be united the channel information of different reporting types in same sub-frame of uplink position, for example, at the 0th frame the RI information of the 2bits of the CQI information of the 4bits of descending carrier 1 feedback and descending carrier 2 feedbacks is united, generate the multiple carrier channel information of 6bits.
Can to be subscriber equipment directly merge the channel information at least two descending carriers of same sub-frame of uplink location transmission subscriber equipment the mode at the channel information of at least two descending carriers of same sub-frame of uplink location transmission of uniting, and also can be subscriber equipment carries out differential cascade to the channel information at least two descending carriers of same sub-frame of uplink location transmission.The above-mentioned channel information that carries out at least two descending carriers of differential cascade is the channel information of same type.
In the multiple carrier channel information that subscriber equipment generates, the ordinal relation between the channel information of different descending carriers can be arranged by subscriber equipment self, and uploads to the base station by subscriber equipment; Also can arrange, and pass through high-level signaling or control transmitting signaling downwards, can also arrange jointly through consultation by base station and subscriber equipment to subscriber equipment by the base station by the base station.
Subscriber equipment carries out Base-Band Processing to multiple carrier channel information, comprises steps such as coding, modulation, spread spectrum and physical resource mapping, can continue to use the processing mode of the ascending control channel form 2 of LTE Release 8 version definition.Particularly, subscriber equipment uses a (20 to multiple carrier channel information, A) sign indicating number carries out chnnel coding, and by QPSK (Quadrature Phase Shift Keying, Quadrature Phase Shift Keying) modulation obtains 10 symbols, and the cyclically shifted sequences that re-uses length and be 12 carries out spread spectrum to modulation symbol, and the multiple carrier channel information behind the spread spectrum adopts the mode of frequency hopping to be mapped in the subframe, be that the employed frequency band of transmitting channel information is different in two time slots in the same subframe.
Subscriber equipment can be specified in advance to the up channel that the base station sends multiple carrier channel information.
The technical scheme of the embodiment of the invention has the following advantages, because channel information at least two descending carriers of same sub-frame of uplink position associating, generate multiple carrier channel information, and multiple carrier channel information carried out Base-Band Processing, multiple carrier channel information after the Base-Band Processing is sent to the base station, saved the feedback overhead of channel information effectively.
As shown in Figure 3, a kind of channel information feedback method flow chart in the embodiment of the invention two may further comprise the steps:
Multiple carrier channel information create-rule can comprise the ordinal relation between the channel information of different descending carriers in the multiple carrier channel information, before user terminal generates multiple carrier channel information, the ordinal relation in the agreement multiple carrier channel information of base station between the channel information of different descending carriers.For example, descending carrier 1 is in the RI information of the 0th frame feedback 2bits, descending carrier 2 also feeds back the RI information of 2bits at the 0th frame, subscriber equipment can be united the RI information of descending carrier 1 and descending carrier 2 feedbacks at the 0th frame, generate the multiple carrier channel information of 4bits, 2bits information was the RI information of descending carrier 1 before the base station can be arranged in this multiple carrier channel information, the RI information that back 2bits information is descending carrier 2.
After the ordinal relation in the agreement multiple carrier channel information of base station between the channel information of different descending carriers, can send high-level signaling or control signaling to subscriber equipment, all carry the ordinal relation between the channel information of different descending carriers in this high-level signaling and this control signaling.
Need to prove that this step is a preferred steps.When base station and subscriber equipment are arranged multiple carrier channel information create-rule jointly, can not carry out this step, promptly the base station does not need multiple carrier channel information create-rule notifying user equipment.
Subscriber equipment receives from the high-level signaling of base station or control information, obtain the ordinal relation between the channel information of different descending carriers, and according to this ordinal relation the channel information at least two descending carriers of same sub-frame of uplink location transmission is directly merged, generate the multiple carrier channel information that is not more than 13 bits.
Base-Band Processing comprises steps such as coding, modulation, spread spectrum and physical resource mapping, can continue to use the processing mode of the ascending control channel form 2 of LTERelease 8 version definition.
The multiple carrier channel information of step 305, the subscriber equipment up channel by appointment after with Base-Band Processing sends to the base station.
Channel-decoding can comprise treatment steps such as demodulation, decoding.
Need to prove that the inventive method can be adjusted each sequence of steps according to actual needs.
The technical scheme of the embodiment of the invention has the following advantages, because channel information at least two descending carriers of same sub-frame of uplink position associating, generate multiple carrier channel information, and multiple carrier channel information carried out Base-Band Processing, save the feedback overhead of channel information effectively, improved the error correcting capability in the channel information transmission course.
As shown in Figure 4, a kind of channel information feedback method flow chart in the embodiment of the invention three may further comprise the steps:
Multiple carrier channel information create-rule comprises at least one in the following content: the content of the ordinal relation in the multiple carrier channel information between the channel information of different descending carriers, the selective rule of reference carrier and reference channel information.
User terminal generates before the multiple carrier channel information, the ordinal relation in the agreement multiple carrier channel information between the channel information of different descending carriers, and this ordinal relation reported the base station.
Reference channel information is the channel information of reference carrier or at the mean value of the channel information of at least two descending carriers of same sub-frame of uplink location transmission.With CQI information is example, CQI magnitude in the CQI information of descending carrier 1, descending carrier 2 and the descending carrier 3 of same sub-frame of uplink location transmission is respectively 5,1 and at 15 o'clock, if select descending carrier 1 as reference carrier, then reference channel information can be the CQI magnitude 5 in the CQI information of descending carrier 1, also can be the mean value of the CQI magnitude in the CQI information of descending carrier 1, descending carrier 2 and descending carrier 3, i.e. (5+1+15)/3=7.
For example, CQI magnitude in the CQI information of descending carrier 1, descending carrier 2 and the descending carrier 3 of same sub-frame of uplink location transmission is respectively 5,1 and at 15 o'clock, select descending carrier 1 as reference carrier, descending carrier 2 and descending carrier 3 are non-reference carrier, the size of the reference channel information of reference carrier correspondence is 4bits, and the size of the difference information of non-reference carrier correspondence is 3bits.The difference information of 3bits is the difference of 8 magnitudes of expression at most, i.e. 3,2,1,0 ,-1 ,-2 ,-3 and-4 magnitudes.During reference channel information correspondence CQI magnitude 5, the difference information of descending carrier 2 and descending carrier 3 correspondences is corresponding CQI magnitude 1 and CQI magnitude 8 respectively; During reference channel information correspondence CQI magnitude 7, the difference information of descending carrier 2 and descending carrier 3 correspondences is corresponding CQI magnitude 3 and CQI magnitude 10 respectively.
Base-Band Processing comprises steps such as coding, modulation, spread spectrum and physical resource mapping, can continue to use the processing mode of the ascending control channel form 2 of LTERelease 8 version definition.
The multiple carrier channel information of step 407, the subscriber equipment up channel by appointment after with Base-Band Processing sends to the base station.
Channel-decoding can comprise treatment steps such as demodulation, decoding.
Need to prove that the inventive method can be adjusted each sequence of steps according to actual needs.
The technical scheme of the embodiment of the invention has the following advantages, because channel information at least two descending carriers of same sub-frame of uplink position associating, generate multiple carrier channel information, and multiple carrier channel information carried out Base-Band Processing, save the feedback overhead of channel information effectively, improved the error correcting capability in the channel information transmission course.
As shown in Figure 5, a kind of user device architecture schematic diagram in the embodiment of the invention four comprises:
Because different descending carriers can adopt similar and different feedback of channel information pattern, generation module 510 can be united the channel information of a plurality of descending carriers in same sub-frame of uplink position, generates multiple carrier channel information.For example, descending carrier 1 is in the RI information of the 0th frame feedback 2bits, descending carrier 2 also in the RI information of the 0th frame feedback 2bits, can unite the RI information of descending carrier 1 and descending carrier 2 feedbacks at the 0th frame, generates the multiple carrier channel information of 4bits by subscriber equipment.Subscriber equipment also can be united the channel information of different reporting types in same sub-frame of uplink position, for example, at the 0th frame the RI information of the 2bits of the CQI information of the 4bits of descending carrier 1 feedback and descending carrier 2 feedbacks is united, generate the multiple carrier channel information of 6bits.
Above-mentioned generation module 510 is the channel informations of being responsible in the above subscriber equipment uniting at least two descending carriers of same sub-frame of uplink location transmission, generates the part of multiple carrier channel information, can be software, hardware or both combinations.
Above-mentioned generation module 510 also is used for the channel information at least two descending carriers of same sub-frame of uplink location transmission is directly merged, and generates multiple carrier channel information; Or
Channel information at least two descending carriers of same sub-frame of uplink location transmission is carried out differential cascade, generate multiple carrier channel information.
The above-mentioned channel information that carries out at least two descending carriers of differential cascade is the channel information of same type.
Treatment steps such as 520 pairs of multiple carrier channel information of baseband processing module are encoded, modulation, spread spectrum and physical resource mapping, the processing method of each step can be continued to use the processing mode of the ascending control channel form 2 of LTE Release 8 version definition.
Sending module 530 electrically connects with baseband processing module 520, and the multiple carrier channel information after being used for by up channel baseband processing module 520 being handled sends to the base station.
Above-mentioned sending module 530 is parts of being responsible for sending to by the multicarrier letter of up channel after with Base-Band Processing the base station in the above subscriber equipment, can be software, hardware or both combinations.
Multiple carrier channel information create-rule comprises at least one in the following content: the content of the ordinal relation in the multiple carrier channel information between the channel information of different descending carriers, the selective rule of reference carrier and reference channel information.
Above-mentioned agreement module 540 is to be responsible for the part of agreement multiple carrier channel information create-rule in the above subscriber equipment, can be software, hardware or both combinations.
Above-mentioned reporting module 550 is to be responsible for reporting to the base station part of the multiple carrier channel information create-rule of agreement in the above subscriber equipment, can be software, hardware or both combinations.
Above-mentioned generation module 510 comprises:
Reference channel information is the channel information of reference carrier or at the mean value of the channel information of at least two descending carriers of same sub-frame of uplink location transmission.
Obtain submodule 512, electrically connect, be used to obtain the difference information between non-reference carrier and the reference carrier with chooser module 512.
Non-reference carrier and reference carrier are at same sub-frame of uplink location transmission channel information.
Generate submodule 513, with chooser module 511 with obtain submodule 512 and electrically connect, be used for reference channel information and difference information are carried out cascade, generate multiple carrier channel information.
Wherein, each module of apparatus of the present invention can be integrated in one, and also can separate deployment.Above-mentioned module can be merged into a module, also can further split into a plurality of submodules.
The technical scheme of the embodiment of the invention has the following advantages, by the channel information of subscriber equipment at least two descending carriers of same sub-frame of uplink position associating, generate multiple carrier channel information, and multiple carrier channel information carried out Base-Band Processing, save the feedback overhead of channel information effectively, improved the error correcting capability in the channel information transmission course.
As shown in Figure 6, a kind of architecture of base station schematic diagram in the embodiment of the invention five comprises:
Multiple carrier channel information create-rule comprises at least one in the following content: the content of the ordinal relation in the multiple carrier channel information between the channel information of different descending carriers, the selective rule of reference carrier and reference channel information.
Above-mentioned first acquisition module 610 is parts of being responsible for obtaining multiple carrier channel information create-rule in the above base station, can be software, hardware or both combinations.
Above-mentioned receiver module 620 is parts of being responsible in the above base station receiving from the multiple carrier channel information after the Base-Band Processing of subscriber equipment, can be software, hardware or both combinations.
Multiple carrier channel information after 630 pairs of Base-Band Processing of decoder module is carried out treatment steps such as demodulation, decoding.
Above-mentioned second acquisition module 640 is to be responsible in the above base station obtaining the part of the channel information of different descending carriers in the multiple carrier channel information according to multiple carrier channel information create-rule, can be software, hardware or both combinations.
Above-mentioned first acquisition module 610 comprises:
About stator modules 611 is used to arrange multiple carrier channel information create-rule; And/or
Receive submodule 612, be used to receive multiple carrier channel information create-rule from subscriber equipment.
The multiple carrier channel information create-rule that first acquisition module 610 obtains can obtain by about stator modules 611 agreements, also can receive from subscriber equipment by receiving submodule 612.
Above-mentioned base station also comprises:
Multiple carrier channel information create-rule by about stator modules 611 approximately regularly, the multiple carrier channel information create-rule that notification module 650 will about stator modules 611 agreements sends to subscriber equipment, generates multiple carrier channel information for subscriber equipment.
Above-mentioned notification module 650 is parts of being responsible in the above base station the multiple carrier channel information create-rule notifying user equipment of agreement, can be software, hardware or both combinations.
Wherein, each module of apparatus of the present invention can be integrated in one, and also can separate deployment.Above-mentioned module can be merged into a module, also can further split into a plurality of submodules.
The technical scheme of the embodiment of the invention has the following advantages, by the base station according to the multiple carrier channel information create-rule that obtains, obtain the channel information of at least two descending carriers in same sub-frame of uplink position, save the feedback overhead of channel information effectively, improved the error correcting capability in the channel information transmission course.
As shown in Figure 7, a kind of feedback of channel information system configuration schematic diagram in the embodiment of the invention six comprises:
The mode that subscriber equipment 710 is united at the channel information of two descending carriers of same sub-frame of uplink location transmission at least can be that 710 pairs of channel informations at least two descending carriers of same sub-frame of uplink location transmission of subscriber equipment directly merge, and also can be that 710 pairs of channel informations at least two descending carriers of same sub-frame of uplink location transmission of subscriber equipment carry out differential cascade.
Channel-decoding can comprise treatment steps such as demodulation, decoding.
Above-mentioned subscriber equipment 710 also is used to arrange multiple carrier channel information create-rule, reports the multiple carrier channel information create-rule of agreement to base station 720.
Multiple carrier channel information create-rule comprises at least one in the following content: the content of the ordinal relation in the multiple carrier channel information between the channel information of different descending carriers, the selective rule of reference carrier and reference channel information.Multiple carrier channel information create-rule is by subscriber equipment 710 timing approximately, and subscriber equipment 710 reports the multiple carrier channel information create-rule of agreement to base station 720.
Above-mentioned base station 720 also is used to arrange multiple carrier channel information create-rule, with the multiple carrier channel information create-rule notifying user equipment 710 of agreement.
Multiple carrier channel information create-rule is by base station 720 timing approximately, and base station 720 sends to subscriber equipment 710 by high-level signaling or control signaling with the multiple carrier channel information create-rule of arranging.
The technical scheme of the embodiment of the invention has the following advantages, by the channel information of subscriber equipment at least two descending carriers of same sub-frame of uplink position associating, generate multiple carrier channel information, and multiple carrier channel information carried out Base-Band Processing, save the feedback overhead of channel information effectively, improved the error correcting capability in the channel information transmission course.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a station terminal equipment (can be mobile phone, personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be looked protection scope of the present invention.
It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.
The invention described above embodiment sequence number is not represented the quality of embodiment just to description.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (23)
1. a channel information feedback method is applied to comprise in the system of base station and subscriber equipment, it is characterized in that, said method comprising the steps of:
Described subscriber equipment is united the channel information at least two descending carriers of same sub-frame of uplink location transmission, generates multiple carrier channel information;
Described subscriber equipment carries out Base-Band Processing to described multiple carrier channel information; Wherein, described subscriber equipment carries out Base-Band Processing to described multiple carrier channel information, comprising: described multiple carrier channel information mapping is arrived in the same subframe;
Described subscriber equipment sends to described base station by the multiple carrier channel information of up channel after with described Base-Band Processing.
2. the method for claim 1 is characterized in that, described subscriber equipment is united the channel information at least two descending carriers of same sub-frame of uplink location transmission, generates multiple carrier channel information, comprising:
Described subscriber equipment directly merges the channel information of described two descending carriers in same sub-frame of uplink location transmission at least, generates described multiple carrier channel information; Or
Described subscriber equipment carries out differential cascade to the channel information of described at least two descending carriers in same sub-frame of uplink location transmission, generates described multiple carrier channel information.
3. method as claimed in claim 2 is characterized in that, described subscriber equipment carries out differential cascade to the channel information at least two descending carriers of same sub-frame of uplink location transmission, generates described multiple carrier channel information, comprising:
Described subscriber equipment from described at least two descending carriers of same sub-frame of uplink location transmission channel information the selection reference carrier wave, descending carrier except that described reference carrier in described at least two descending carriers as non-reference carrier, is obtained the reference channel information of described reference carrier correspondence;
Described subscriber equipment obtains the difference information between described non-reference carrier and the described reference carrier;
Described subscriber equipment carries out cascade to described reference channel information and described difference information, generates described multiple carrier channel information.
4. method as claimed in claim 3 is characterized in that, the mean value of the channel information of the channel information that described reference channel information is described reference carrier or described at least two descending carriers in same sub-frame of uplink location transmission.
5. method as claimed in claim 3 is characterized in that, the described channel information that carries out at least two descending carriers of differential cascade is the channel information of same type.
6. the method for claim 1 is characterized in that, described subscriber equipment is united the channel information at least two descending carriers of same sub-frame of uplink location transmission, generates before the multiple carrier channel information, also comprises:
Described base station agreement multiple carrier channel information create-rule;
Described subscriber equipment is notified with described multiple carrier channel information create-rule in described base station.
7. method as claimed in claim 6 is characterized in that, described base station is specially multiple carrier channel information create-rule notifying user equipment:
Described base station sends high-level signaling or control signaling to described subscriber equipment, all carries described multiple carrier channel information create-rule in described high-level signaling and the described control signaling.
8. the method for claim 1 is characterized in that, described subscriber equipment is united the channel information at least two descending carriers of same sub-frame of uplink location transmission, generates before the multiple carrier channel information, also comprises:
Described base station and described subscriber equipment are arranged multiple carrier channel information create-rule jointly.
9. the method for claim 1 is characterized in that, described subscriber equipment is united the channel information at least two descending carriers of same sub-frame of uplink location transmission, generates before the multiple carrier channel information, also comprises:
Described subscriber equipment agreement multiple carrier channel information create-rule;
Described subscriber equipment reports described multiple carrier channel information create-rule to described base station.
10. method as claimed in claim 9 is characterized in that, described subscriber equipment sends to after the described base station by the multiple carrier channel information of up channel after with described Base-Band Processing, also comprises:
The multiple carrier channel information of described base station after to the described Base-Band Processing that receives is carried out channel-decoding;
Described base station obtains the channel information of different descending carriers in the described multiple carrier channel information according to described multiple carrier channel information create-rule.
11., it is characterized in that described multiple carrier channel information create-rule comprises at least one in the following content as each described method of claim 6 to 10:
The content of the ordinal relation in the described multiple carrier channel information between the channel information of different descending carriers, the selective rule of reference carrier and described reference channel information.
12., it is characterized in that the channel information of described descending carrier comprises at least one in the following content as each described method of claim 1 to 10:
Sub-band channel quality indication CQI information, order indication RI information, broadband CQI information and broadband pre-coding matrix indication PMI information.
13., it is characterized in that the size of described multiple carrier channel information is not more than 13 bits as each described method of claim 1 to 10.
14. a subscriber equipment is characterized in that, comprising:
Generation module is used to unite the channel information at least two descending carriers of same sub-frame of uplink location transmission, generates multiple carrier channel information;
Baseband processing module electrically connects with described generation module, is used for the described multiple carrier channel information that described generation module generates is carried out Base-Band Processing; Wherein, described baseband processing module specifically is used for: described multiple carrier channel information mapping is arrived in the same subframe;
Sending module electrically connects with described baseband processing module, and the multiple carrier channel information after being used for by up channel described baseband processing module being handled sends to the base station.
15. as subscriber equipment as described in the claim 14, it is characterized in that,
Described generation module also is used for the channel information of described at least two descending carriers in same sub-frame of uplink location transmission is directly merged, and generates described multiple carrier channel information; Or
Channel information to described at least two descending carriers in same sub-frame of uplink location transmission carries out differential cascade, generates described multiple carrier channel information.
16., it is characterized in that described generation module comprises as subscriber equipment as described in the claim 15:
The chooser module, be used for from described at least two descending carrier selection reference carrier waves at same sub-frame of uplink location transmission channel information, descending carrier except that described reference carrier in described at least two descending carriers as non-reference carrier, is obtained the reference channel information of described reference carrier correspondence;
Obtain submodule, electrically connect, be used to obtain the difference information between described non-reference carrier and the described reference carrier with described chooser module;
Generate submodule, electrically connect, be used for described reference channel information and described difference information are carried out cascade, generate described multiple carrier channel information with described chooser module and the described submodule that obtains.
17. as claim 14 to 16 subscriber equipment as described in each, it is characterized in that, also comprise:
The agreement module electrically connects with described generation module, is used to arrange multiple carrier channel information create-rule, generates described multiple carrier channel information for described generation module;
Reporting module electrically connects with described agreement module, is used for reporting to described base station the described multiple carrier channel information create-rule of described agreement module agreement.
18. a base station is characterized in that, comprising:
First acquisition module is used to obtain multiple carrier channel information create-rule;
Receiver module is used to receive the multiple carrier channel information from after the Base-Band Processing of subscriber equipment;
Decoder module electrically connects with described receiver module, and the multiple carrier channel information after the described Base-Band Processing that is used for described receiver module is received is carried out channel-decoding;
Second acquisition module electrically connects with described first acquisition module and described decoder module, is used for the multiple carrier channel information create-rule that obtains according to described first acquisition module, obtains the channel information of different descending carriers in the described multiple carrier channel information; Wherein, the multiple carrier channel information after the described Base-Band Processing is positioned at same subframe.
19., it is characterized in that described first acquisition module comprises as base station as described in the claim 18:
About stator modules is used to arrange described multiple carrier channel information create-rule; And/or
Receive submodule, be used to receive described multiple carrier channel information create-rule from described subscriber equipment.
20. as base station as described in the claim 19, it is characterized in that, also comprise:
Notification module electrically connects with described first acquisition module, is used for notifying described subscriber equipment with the multiple carrier channel information create-rule of described agreement.
21. a feedback of channel information system is characterized in that, comprising:
Subscriber equipment, be used to unite channel information at least two descending carriers of same sub-frame of uplink location transmission, generate multiple carrier channel information, described multiple carrier channel information is carried out Base-Band Processing, send to the base station by the multiple carrier channel information of up channel after with described Base-Band Processing; Wherein, described described multiple carrier channel information is carried out Base-Band Processing, comprising: with described multiple carrier channel information mapping in same subframe;
The base station is used to receive the multiple carrier channel information from after the described Base-Band Processing of described subscriber equipment, and described multiple carrier channel information is carried out channel-decoding, obtains the channel information of different descending carriers in the described multiple carrier channel information.
22. system as claimed in claim 21 is characterized in that,
Described subscriber equipment also is used to arrange multiple carrier channel information create-rule, reports the multiple carrier channel information create-rule of described agreement to described base station.
23. as claim 21 or 22 described systems, it is characterized in that,
Described base station also is used to arrange multiple carrier channel information create-rule, notifies described subscriber equipment with the multiple carrier channel information create-rule of described agreement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910082972 CN101873206B (en) | 2009-04-27 | 2009-04-27 | Method, device and system for feeding back channel information |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910082972 CN101873206B (en) | 2009-04-27 | 2009-04-27 | Method, device and system for feeding back channel information |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101873206A CN101873206A (en) | 2010-10-27 |
| CN101873206B true CN101873206B (en) | 2013-07-31 |
Family
ID=42997883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910082972 Active CN101873206B (en) | 2009-04-27 | 2009-04-27 | Method, device and system for feeding back channel information |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101873206B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102468938A (en) * | 2010-11-10 | 2012-05-23 | 鼎桥通信技术有限公司 | Uplink feedback data transmission method and user equipment |
| CN102480338B (en) * | 2010-11-29 | 2016-03-30 | 华为技术有限公司 | Reporting source of channel state information indicating means, report method, services sites and terminal |
| US9119101B2 (en) * | 2010-12-17 | 2015-08-25 | Samsung Electronics Co., Ltd. | Apparatus and method for periodic channel state reporting in a wireless network |
| CN111246576B (en) * | 2011-03-31 | 2020-12-25 | 华为技术有限公司 | Method, base station and user equipment for configuring subframes in time division duplex system |
| CN102255694A (en) * | 2011-07-19 | 2011-11-23 | 电信科学技术研究院 | Channel state information transmission method and equipment |
| BR112017009346B1 (en) * | 2014-11-07 | 2023-02-23 | Huawei Technologies Co., Ltd | INFORMATION TRANSMISSION METHOD, TERMINAL DEVICE, BASE STATION AND COMPUTER READABLE STORAGE MEDIA |
| CN107113661B (en) * | 2014-12-31 | 2020-07-07 | 华为技术有限公司 | Precoding Matrix Indicator (PMI) feedback method and device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101051878A (en) * | 2006-04-06 | 2007-10-10 | 华为技术有限公司 | Method and device for realizing channel feedback in communication system |
| CN101277166A (en) * | 2008-04-03 | 2008-10-01 | 中兴通讯股份有限公司 | Method for feedback of channel quality indication |
| CN101411110A (en) * | 2006-03-27 | 2009-04-15 | 高通股份有限公司 | Feedback of channel state information for MIMO and subband scheduling in a wireless communication system |
-
2009
- 2009-04-27 CN CN 200910082972 patent/CN101873206B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101411110A (en) * | 2006-03-27 | 2009-04-15 | 高通股份有限公司 | Feedback of channel state information for MIMO and subband scheduling in a wireless communication system |
| CN101051878A (en) * | 2006-04-06 | 2007-10-10 | 华为技术有限公司 | Method and device for realizing channel feedback in communication system |
| CN101277166A (en) * | 2008-04-03 | 2008-10-01 | 中兴通讯股份有限公司 | Method for feedback of channel quality indication |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101873206A (en) | 2010-10-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11349541B2 (en) | Data transmission method, terminal device, and network device | |
| US10666397B2 (en) | Method and apparatus for control signaling | |
| CN103081388B (en) | Terminal installation, base station apparatus, communication system and communication means | |
| CN101873206B (en) | Method, device and system for feeding back channel information | |
| EP2556610B1 (en) | Apparatus and method for transmitting uplink scheduling request in mobile communication system | |
| CN102113242B (en) | Receive the method and apparatus of data in a wireless communication system | |
| CN102082625B (en) | Method and device for back feeding multi-carrier channel information | |
| CN102342054B (en) | Method and apparatus for reporting channel state in multi-carrier system | |
| EP3396886B9 (en) | Method and apparatus for transmitting pilot signal | |
| CN102065054B (en) | Scrambling transmission method and device | |
| CN102907029B (en) | A kind of method and apparatus for the instruction of aperiodicity channel quality | |
| CN110034859B (en) | Communication method and device | |
| CN102869049B (en) | Method for transmitting control channel indication information, base station and user equipment | |
| EP3451560B1 (en) | Data transmission method and apparatus | |
| CN103648171A (en) | Method and apparatus for communication between a user equipment (UE) and a node B in a communication system | |
| CA2680836A1 (en) | Base station, communication terminal, transmission method, and reception method | |
| US10264601B2 (en) | Downlink control information transmission method and apparatus | |
| KR20130120467A (en) | Feedback method and mobile terminal device | |
| CN103580810A (en) | Channel state information sending method and device | |
| CN101729217A (en) | Method, device and system for transmission | |
| CN100539462C (en) | Be used for supporting the method for the multiple-input and multiple-output transmission that OFDM is used | |
| US9843953B2 (en) | Terminal device, base station device, communication system, and communication method | |
| KR20080039174A (en) | Method for transmitting feedback data, method for generating feedback data and method for scheduling data | |
| RU2501168C2 (en) | Wireless transmitter, mobile station and method for wireless transmission of data units | |
| CN111756474B (en) | Data transmission method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: INST OF TELECOMMUNICATION SCIENCE AND TECHNOLGOY Free format text: FORMER OWNER: DATANG MOBILE COMMUNICATION EQUIPMENT CO., LTD. Effective date: 20110506 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100083 NO. 29, XUEYUAN ROAD, HAIDIAN DISTRICT, BEIJING TO: 100191 NO. 40, XUEYUAN ROAD, HAIDIAN DISTRICT, BEIJING |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20110506 Address after: 100191 Haidian District, Xueyuan Road, No. 40, Applicant after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100083 Haidian District, Xueyuan Road, No. 29, Applicant before: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210531 Address after: 100085 1st floor, building 1, yard 5, Shangdi East Road, Haidian District, Beijing Patentee after: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |