CN105099600A - Dynamic MCS (Modulation and Coding Scheme) order selection method in trunking service, base station and monitoring terminal - Google Patents
Dynamic MCS (Modulation and Coding Scheme) order selection method in trunking service, base station and monitoring terminal Download PDFInfo
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Abstract
The invention provides a dynamic MCS order selection method in the trunking service, a base station and a monitoring terminal. The base station issues a pre-estimated CQI values to groups; the base station issues configuration information to the groups periodically to indicate the groups to configure CQI resource in PUCCH, so that the monitoring terminal reports a first pre-estimated CQI value via the CQI resource when the present measured CQI value is lower than the pre-estimated CQI value, the first pre-estimated CQI value represents the difference between the pre-estimated CQI value and the adjusting step length, and the monitoring terminal is in the up self-synchronizing state; if the first pre-estimated CQI value is detected in the CQI resource, the base station adjusts the pre-estimated CQI value into the first pre-estimated CQI value and issues the first pre-estimated CQI value to the monitoring terminal again; if the same first pre-estimated CQI value is detected continuously within the first time interval, the first pre-estimated CQI value serves as the target CQI value of the group; and according to the target CQI value and the down error rate of the group, a target MCS order is selected for the group. Thus, dynamic order selection of the group is realized.
Description
Technical field
The present invention relates to the communications field, particularly relate to MCS in a kind of group service and dynamically select rank method, base station and monitor terminal.
Background technology
The main feature of group service is speaker's terminal speech, and multiple monitor terminal is being listened, and each terminal in group service may in multiple community, also may in same community.Only have a terminal as speaker's terminal, other-end is monitor terminal, in group service, the example of base station side is referred to as group.
At present, base station is the pre-configured modulation of group and coding strategy (ModulationandCodingScheme, be called for short MCS) exponent number, then communicate with the monitor terminal of group based on this MCS exponent number, this MCS exponent number is once configuration, the actual conditions of quality of no matter eating dishes without rice or wine, also no matter whether the lower line number of group passes and occurs transmitting without code, all can not adjust this MCS exponent number.
In reality, the channel quality of each group is not identical, because existing base station can not be that group selects suitable mcs to select rank according to the channel quality of group, all the time the monitor terminal of default MCS exponent number and group is adopted to carry out downlink transfer, so just cannot ensure that the monitor terminal of group all can carry out proper communication, and if lower MCS exponent number preset for the good group of channel quality carried out downlink transfer, limited interface-free resources can be wasted.
Summary of the invention
The invention provides MCS in a kind of group service and dynamically select rank method, base station and monitor terminal, can not according to the defect of the channel quality dynamic conditioning MCS exponent number of group for overcoming existing base station.
To achieve these goals, in a kind of group service provided by the invention, MCS dynamically selects rank method, comprising:
Base station to be issued to group by group's signaling and estimates channel quality indicator (CQI) value;
Described base station periodically issues configuration information to described group, described configuration information is used to indicate the CQI resource that described group is configured for feedback CQI physically in row control channel PUCCH, to make described monitor terminal when estimating CQI value described in the current CQI value measured is less than, described CQI resource report first to estimate CQI value to described base station, wherein said first estimate CQI value for described in estimate CQI value with adjustment step-length difference, described monitor terminal is in up motor synchronizing state;
If detect that in described CQI resource described first estimates CQI value, described CQI value of estimating is adjusted to described first and estimates CQI value by described base station, and is again given the monitor terminal of described group by described group transmitting signaling downwards;
If continue in very first time interval to detect that identical described first estimates CQI value, CQI value is estimated as the target CQI value of mating with described group actual channel quality in described base station using current described first;
Described base station according to described target CQI value and the error rate of described group that gets, for corresponding target MCS exponent number is selected by described group.
To achieve these goals, in a kind of group service provided by the invention, MCS dynamically selects rank method, comprising:
Monitor terminal in group receives group's signaling that base station issues, and that carries described group in described group signaling estimates channel quality indicator (CQI) value;
Described monitor terminal periodically receives the configuration information that described base station issues, and described configuration information is used to indicate the CQI resource that described monitor terminal is configured for feedback CQI physically in row control channel PUCCH;
Described monitor terminal is when estimating CQI value described in the current CQI value measured is less than, described CQI resource report first to estimate CQI value to described base station, to make described base station, described CQI value of estimating is adjusted to described first and estimates CQI value, again the monitor terminal of described group is given by described group transmitting signaling downwards, until continue in described CQI resource in very first time interval to detect that identical described first estimates CQI value, and estimate CQI value using current described first as the target CQI value of mating with described group actual channel quality, be that described group chooses corresponding target MCS exponent number according to described target CQI value and the descending error rate of described group that gets,
Wherein, described first estimate CQI for described in estimate CQI value with adjustment step-length difference, described monitor terminal is in up motor synchronizing state.
To achieve these goals, a kind of base station provided by the invention, comprising:
Sending module, estimates channel quality indicator (CQI) value for being issued to described group by group's signaling;
Configuration module, for periodically issuing configuration information to described group, described configuration information is used to indicate the CQI resource that described group is configured for feedback CQI physically in row control channel PUCCH, to make described monitor terminal when estimating CQI value described in the current CQI value measured is less than, described CQI resource report first estimate CQI value to base station, wherein said first estimate CQI value for described in estimate CQI value with adjustment step-length difference, described monitor terminal is in up motor synchronizing state;
Adjusting module, for detect in described CQI resource described first estimate CQI value after, by described estimate CQI value be adjusted to described first estimate CQI value and again by described group transmitting signaling downwards to the monitor terminal of described group;
Determination module, for continue to detect in very first time interval identical described first estimate CQI value time, estimate CQI value using current described first as the target CQI mated with described group actual channel quality;
Choose module, for according to the descending error rate of described target CQI value with the described group got, for described group chooses corresponding target MCS exponent number.
To achieve these goals, a kind of monitor terminal provided by the invention, comprising:
Receiver module, group's signaling is issued for receiving base station, that carries described group in described group signaling estimates channel quality indicator (CQI) value, and periodically receiving the configuration information that described base station issues, described configuration information is used to indicate the CQI resource that described monitor terminal is configured for feedback CQI physically in row control channel PUCCH;
Sending module, in described CQI resource, first is reported to estimate CQI value to described base station what configure during for estimating CQI value described in being less than at the current CQI value measured, to make described base station, described CQI value of estimating is adjusted to described first and estimates CQI value, and the monitor terminal of described group is again given by described group transmitting signaling downwards, until continue in described CQI resource in very first time interval to detect that identical described first estimates CQI value, and estimate CQI value using current described first as the target CQI value of mating with described group actual channel quality, be that described group chooses corresponding target MCS exponent number according to described target CQI value and the descending error rate of described group that gets,
Wherein, described first estimate CQI for described in estimate CQI value with adjustment step-length difference, the monitor terminal in described group is in up motor synchronizing state.
In group service provided by the invention, MCS dynamically selects rank method, base station and monitor terminal, base station by group's signaling to group issue estimate channel quality instruction (ChannelQuanlityIndicator, be called for short CQI) value, periodically issue configuration information to group, to indicate the monitor terminal Uplink Control Channel (PhysicalUplinkControlChannel physically in group, be called for short PUCCH) in be configured for feedback CQI CQI resource, with make the monitor terminal in described group measure current CQI value be less than estimate CQI value time, described CQI resource report first estimate CQI value to base station, first estimate CQI value be estimate CQI value with adjustment step-length difference, monitor terminal is in up motor synchronizing state, if detect that in CQI resource first estimates CQI value, base station by estimate CQI value be adjusted to first estimate CQI value again by group's transmitting signaling downwards to the monitor terminal of group, if continue in very first time interval to detect that identical first estimates CQI value, CQI value is estimated as the target CQI corresponding with described group actual channel quality in base station using current first, be that group chooses corresponding target MCS exponent number according to target CQI value and the descending error rate of group.In the present invention, base station by configuring the resource of feedback CQI on PUCCH for group, when the CQI value of the actual measurement of monitor terminal be less than estimate CQI value time, feed back to base station on the resource, base station adjusts neatly according to this feedback and estimates CQI to obtain the target CQI value of mating with group actual channel quality, thus can choose suitable MCS exponent number for group
Accompanying drawing explanation
In a kind of group service that Fig. 1 provides for the embodiment of the present invention one, MCS dynamically selects the schematic diagram of rank method;
In a kind of group service that Fig. 2 provides for the embodiment of the present invention two, MCS dynamically selects the schematic diagram of rank method;
In a kind of group service that Fig. 3 provides for the embodiment of the present invention three, MCS dynamically selects the schematic diagram of rank method;
The structural representation of a kind of base station that Fig. 4 provides for the embodiment of the present invention four;
The structural representation of a kind of monitor terminal that Fig. 5 provides for the embodiment of the present invention five;
The structural representation of a kind of monitor terminal that Fig. 6 provides for the embodiment of the present invention five.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.
Embodiment one
In a kind of group service that Fig. 1 provides for the embodiment of the present invention one, MCS dynamically selects the schematic diagram of rank method, and as shown in Figure 1, in this group service, MCS dynamically selects rank method to comprise the following steps:
101, base station to be issued to group by group's signaling and estimates channel quality indicator (CQI) value.
In the present embodiment, base station is that group pre-sets a CQI value as estimating CQI value, then this is estimated CQI value by group's transmitting signaling downwards to the monitor terminal of group.
102, base station periodically issues configuration information to group, described configuration information is used to indicate the CQI resource that group is configured for feedback CQI physically in row control channel PUCCH, reports first to estimate CQI value to make monitor terminal when the current CQI value measured is less than and estimates CQI value in described CQI resource to base station.
Wherein, described first estimate CQI value for described in estimate CQI value with adjustment step-length difference, described monitor terminal is in up motor synchronizing state.
Further, base station issues configuration information to group periodically, and the monitor terminal that this configuration information is used to indicate group is configured for the CQI resource feeding back CQI in PUCCH.Wherein, configuration information can be carried in group's signaling, by this group's transmitting signaling downwards to the monitor terminal of group.After monitor terminal receives configuration information, in PUCCH, configure CQI resource according to this configuration information.
After receiving and estimating CQI value, the monitor terminal of group can be measured the channel quality of self, to obtain the current CQI value of self.Further, monitor terminal by current CQI value with estimate CQI value and compare, current CQI value be less than estimate CQI value time, feedback resources sends to base station first and estimates CQI value.Wherein, first estimate CQI value be estimate CQI value and adjustment step-length between difference.Adjusting step-length in the present embodiment is 1, and such first to estimate CQI value be exactly estimate the difference that CQI subtracts 1.
Need to illustrate, the monitor terminal being in desynchronizing state or idle (IDIE) state can not to base station feedback message, and the monitor terminal in the present embodiment in group is in up motor synchronizing state herein.Particularly, monitor terminal is being carried out in the process of adhering to, and obtains the time offset between monitor terminal and base station, according to the time offset between monitor terminal and base station, safeguards the up motor synchronizing between base station.
In the present embodiment, because base station periodically issues configuration information to group, the new like this monitor terminal added in this group can configure above-mentioned CQI resource according to configuration information in PUCCH, thus the CQI value of actual measurement be less than estimate CQI value time, first can be reported to estimate CQI value to base station by this CQI resource.
If 103 detect that in CQI resource first estimates CQI value, base station by estimate CQI value be adjusted to first estimate CQI value and again by group's transmitting signaling downwards to the monitor terminal of group.
The CQI value whether having monitor terminal to report is detected in base station on CQI resource correspondence position, the CQI value now reported in the present embodiment is first estimate CQI value, when detect in CQI resource report first estimate CQI value after, base station will be estimated CQI value and be adjusted to first and estimate CQI value, then estimate first CQI value as estimate CQI value again by group's transmitting signaling downwards to the monitor terminal of group.
Need explanation herein, what the monitor terminal in group received that base station issues at every turn estimates CQI value, just according to the current CQI value measured, and compare with the CQI value of estimating issued, as long as the current CQI value of actual measurement is less than estimate CQI value, monitor terminal will send first and estimate CQI value in CQI resource to base station, report first estimates the difference estimating CQI value and adjustment step-length that CQI value is group at every turn, and wherein adjusting step-length is 1.
If 104 continue in very first time interval to detect that identical first estimates CQI value, CQI value is estimated as the target CQI value corresponding with group actual channel quality in base station using current first.
When continuing in CQI resource in very first time interval to detect that identical first estimates CQI value, illustrate that current CQI value of estimating can match with group's actual channel quality, stopping is estimated CQI value adjustment to current by base station, estimates CQI value as the target CQI value corresponding with this group's actual channel quality using identical for existing continuous first.
Further, if do not detect in described CQI resource within second time interval that described monitor terminal reports first estimates CQI value, what illustrate that base station issues estimates the actual channel quality that CQI value is not less than group, now base station this is estimated CQI value raise an adjustment step-length as described estimate CQI value and again by group's transmitting signaling downwards to the monitor terminal of group, until detect that in very first time interval lasting identical first estimates CQI value.When detecting that in CQI resource lasting identical first estimates CQI value, illustrate that the CQI value of estimating after adjustment is mated with group actual channel quality, this lasting identical first is estimated the target CQI value of CQI value as group by base station.
In the present embodiment, very first time interval was greater than for second time interval, and wherein, very first time interval is not less than 3 times of second time interval.
105, base station is according to target CQI value and the descending error rate of group that gets, for group chooses corresponding target MCS exponent number.
After determining target CQI value for group, base station can obtain the descending error rate of the downlink transfer of group, be that group chooses suitable target MCS exponent number according to described target CQI value and the described error rate, then communicate with monitor terminal based on this target MCS exponent number.
Wherein, in order to obtain the error rate of the downlink transfer of group, in the present embodiment, base station can be configured for the non-resource of replying NACK Indication message of feedback for group in PUCCH, receive the NACK Indication message of monitor terminal feedback on the resource, base station obtains the error rate of the downlink transfer of group according to the NACK instruction received.
In the present embodiment, when the poor and base station of the channel quality of group's reality estimate CQI value higher time, CQI value is estimated according to first of feedback group actual channel quality in base station, downward is estimated CQI and is thought that group chooses the MCS exponent number corresponding with actual channel quality, so just pass through as the more resources bank (ResourceBlock of group allocation, be called for short RB), promote the voice quality of monitor terminal in group, promote user's impression.
When group's reality channel quality better and base station estimate CQI value lower time, base station does not detect in CQI resource that in Preset Time first of feedback when estimating CQI value, can raise and estimate CQI and be again handed down to group, to obtain the target CQI value of mating with group actual channel quality, thus choose the MCS exponent number corresponding with actual channel quality for group, required RB can be reduced, can saving resource, improve the utilance of interface-free resources.
In the group service that the present embodiment provides, MCS dynamically selects rank method, base station to be issued to group by group's signaling and estimates CQI value, and periodically issue configuration information to group, with the CQI resource indicating group to be configured for feedback CQI in PUCCH, with make monitor terminal measure current CQI value be less than estimate CQI value time, first is reported to estimate CQI value in the CQI resource of configuration to base station, first estimate CQI value be estimate CQI value with adjustment step-length difference, monitor terminal is in up motor synchronizing state, if detect that in CQI resource first estimates CQI value, base station will be estimated CQI value and be adjusted to first and estimate CQI value, and be again handed down to the monitor terminal of group, if continue in very first time interval to detect that identical first estimates CQI value, CQI value is estimated as the target CQI corresponding with group actual channel quality in base station using current first, according to target CQI value and choosing and corresponding target MCS exponent number for group of getting.In the present embodiment, base station by configuring the resource of feedback CQI on PUCCH for group, when the CQI value of the actual measurement of monitor terminal be less than estimate CQI value time, feed back to base station on the resource, base station adjusts neatly according to this feedback and estimates CQI to obtain the target CQI value of mating with group actual channel quality, thus can choose suitable MCS exponent number for group.
Embodiment two
In a kind of group service that Fig. 2 provides for the embodiment of the present invention two, MCS dynamically selects the schematic diagram of rank method.As shown in Figure 2, in this group service, MCS dynamically selects rank method to comprise the following steps:
201, the monitor terminal in group receives group's signaling that base station issues, and that carries group in group's signaling estimates channel quality indicator (CQI) value.
Particularly, the monitor terminal in group can receive group's signaling that base station issues.Wherein carrying base station in this group's signaling is that group pre-sets a CQI value as estimating CQI value.After monitor terminal receives group's signaling, what from this group's signaling, get this group estimates CQI value.
202, monitor terminal periodically receives the configuration information that base station issues, and configuration information is used to indicate the CQI resource that described monitor terminal is configured for feedback CQI physically in row control channel PUCCH.
Further, monitor terminal can be periodically received the configuration information that base station issues, and after getting this configuration information, monitor terminal is configured for the CQI resource of feedback CQI according to this configuration information in PUCCH.Wherein, configuration information can be carried in group's signaling, by this group's transmitting signaling downwards to the monitor terminal of group.
In the present embodiment, because base station periodically issues configuration information to group, the new like this monitor terminal added in this group can configure above-mentioned CQI resource according to configuration information in PUCCH.
203, monitor terminal measure current CQI value be less than estimate CQI value time, CQI resource report first estimate CQI value to base station, with make base station by estimate CQI value be adjusted to first estimate CQI value and again by group's transmitting signaling downwards to the monitor terminal of group, until continue in CQI resource in very first time interval to detect that identical first estimates CQI value, and estimate CQI value using current first as the target CQI value of mating with group actual channel quality, be that group chooses corresponding target MCS exponent number according to target CQI value and the descending error rate of group that gets.
Wherein, described first estimate CQI for described in estimate CQI value with adjustment step-length difference, described monitor terminal is in up motor synchronizing state.
Receive that base station issues estimate CQI value after, monitor and measurement is carried out to the channel quality of self get current CQI value.Monitor terminal receives the pre-coding matrix instruction (PrecodingMatrixIndicator of group's configuration, be called for short PMI), wherein, this PMI is used in reference to and illustrates that base station is the pre-coding matrix that monitor terminal is chosen, and monitor terminal adopts the pre-coding matrix measurement of group to obtain current CQI value.
Further, monitor terminal by current CQI value with estimate CQI value and compare, when current CQI value be less than estimate CQI value time, in the CQI resource feeding back CQI, estimate CQI value to base station feedback first in configuration.
In the present embodiment first estimate CQI value be estimate CQI value and adjustment step-length between difference.Adjusting step-length in the present embodiment is 1, and such first to estimate CQI value be exactly estimate the difference that CQI subtracts 1.
Need to illustrate, the monitor terminal being in desynchronizing state or idle (IDIE) state can not to base station feedback message, and the monitor terminal in the present embodiment in group is in up motor synchronizing state herein.Particularly, monitor terminal is being carried out in the process of adhering to, and obtains the time offset between monitor terminal and base station, according to the time offset between monitor terminal and base station, safeguards the up motor synchronizing between base station.
Monitor terminal reports first to estimate CQI value in CQI resource to base station, detect in this CQI resource to make base station whether have monitor terminal to report first estimate CQI value.When detect in CQI resource report first estimate CQI value after, base station will be estimated CQI value and be adjusted to first and estimate CQI value, then estimate CQI value using first and re-issue to group as estimating CQI value.
Need explanation herein, what the monitor terminal in group received that base station issues at every turn estimates CQI value, just according to the current CQI value measured, and compare with the CQI value of estimating issued, as long as the current CQI value of actual measurement is less than estimate CQI value, monitor terminal will send first and estimate CQI value in CQI resource to base station, report first estimates CQI value is at every turn current CQI value and the difference adjusting step-length 1.
When continuing in CQI resource in very first time interval to detect that identical first estimates CQI value, illustrate that current first estimates CQI value and can match with group's actual channel quality, CQI value is estimated as the target CQI value corresponding with this group's actual channel quality using current identical first in base station.
Further, when monitor terminal compares the current CQI value of actual measurement higher than estimating CQI value, monitor terminal does not report first to estimate CQI value in CQI resource to base station.Correspondingly, if what base station did not detect in CQI resource within second time interval that monitor terminal reports first estimates CQI value, what illustrate that base station issues estimates the actual channel quality that CQI value is not less than group, now base station this is estimated CQI value raise an adjustment step-length as estimate CQI value and again by group's transmitting signaling downwards to the monitor terminal of group, until continue in very first time interval to detect that identical first estimates CQI value.When detecting that in CQI resource lasting identical first estimates CQI value, illustrate that first after adjustment is estimated CQI value and mated with group actual channel quality, this identical first is estimated the target CQI value of CQI value as group by base station.
After determining target CQI value for group, base station can obtain the error rate of the downlink transfer of group, be that group chooses suitable target MCS exponent number according to described target CQI value and the described error rate, then communicate with monitor terminal based on this target MCS exponent number.
Wherein, in order to obtain the error rate of the downlink transfer of group, in the present embodiment, base station can be configured for the non-resource of replying NACK Indication message of feedback for group in PUCCH, receive the NACK Indication message of monitor terminal feedback on the resource, base station obtains the error rate of the downlink transfer of group according to the NACK instruction received.
In the present embodiment, when the poor and base station of the channel quality of group's reality estimate CQI value higher time, CQI value is estimated according to first of feedback group actual channel quality in base station, downward is estimated CQI and is thought that group chooses the CQI value corresponding with actual channel quality, corresponding MCS exponent number is selected again according to group's CQI value, so just pass through, for the more RB of group allocation, to promote the voice quality of monitor terminal in group, promote user's impression.
When group's reality channel quality better and base station estimate CQI value lower time, base station does not detect in CQI resource that in Preset Time first of feedback when estimating CQI value, can raise and estimate CQI and be again handed down to group, to obtain the target CQI mated with group actual channel quality, thus choose the CQI value corresponding with actual channel quality for group, then select corresponding MCS exponent number according to group's CQI value, required RB can be reduced, can saving resource, improve the utilance of interface-free resources.
In the group service that the present embodiment provides, MCS dynamically selects rank method, what the monitor terminal reception base station in group issued estimates CQI value, in CQI resource, first is reported to estimate CQI value to base station when the current CQI value measured is less than and estimates CQI value, CQI value will be estimated to make base station to be adjusted to first and to estimate CQI value again send to monitor terminal, until continue in very first time interval to detect that identical first estimates CQI value, and estimate CQI value using current first as the target CQI value corresponding with group actual channel quality, and choose the target MCS exponent number corresponding with target CQI value for group.In the present embodiment, monitor terminal is fed back to base station in the CQI resource of configuration, base station is adjusted flexibly estimate CQI to obtain the target CQI value of mating with group actual channel quality, thus can choose suitable MCS exponent number for group.
Embodiment three
In a kind of group service that Fig. 3 provides for the embodiment of the present invention three, MCS dynamically selects the schematic diagram of rank method.As shown in Figure 3, in this group service, MCS dynamically selects rank method to comprise the following steps:
301, base station to be issued to group by group's signaling and estimates CQI value.
302, base station periodically issues configuration information to group, and configuration information is used to indicate the CQI resource that group is configured for feedback CQI in PUCCH.
303, monitor terminal judges whether the current CQI value measured is less than and estimates CQI value.
Particularly, the PMI that monitor terminal configures according to group chooses pre-coding matrix, measures the current CQI value of current pre-coding matrix.Monitor terminal by the current CQI value measured with estimate CQI value and compare, judge whether current CQI value is less than and estimate CQI value, if judged result is yes, perform step 304, otherwise execution step 308.
304, monitor terminal reports first to estimate CQI value in CQI resource to base station.
Wherein, described first estimate CQI value be estimate CQI value with adjustment step-length difference, described monitor terminal is in up motor synchronizing state.
Step 304 see the record of related content in above-described embodiment, can repeat no more herein.
If 305 detect that in CQI resource first estimates CQI value, base station will be estimated CQI and be adjusted to first and estimate CQI value, again estimate CQI value by group's transmitting signaling downwards.
Particularly, when the poor and base station of the channel quality of group's reality estimate CQI value higher time, first to estimate CQI value be estimate the difference of CQI value and default step-length for this.Monitor terminal will report first to estimate CQI value in CQI resource to base station, the CQI value whether receiving and reported by monitor terminal is detected in base station in this CQI resource, and in the present embodiment, this CQI value is first estimate CQI value.
After detecting that first estimates CQI value, base station will be estimated CQI value and be adjusted to first and estimate CQI value, be about to estimate CQI value and lower 1 adjustment step-length.
If 306 continue in very first time interval to detect that identical first estimates CQI value, CQI value is estimated as the target CQI value corresponding with group actual channel quality in base station using current first.
When continuing in CQI resource in very first time interval to detect that identical first estimates CQI value, illustrate that current CQI value of estimating can match with group's actual channel quality, CQI value is estimated as the target CQI value corresponding with this group's actual channel quality using current identical first in base station.
307, base station is according to target CQI value and the descending error rate of group that gets, for group chooses corresponding target MCS exponent number.
Step 307, see the record of related content in above-described embodiment, repeats no more herein.
If 308 within second time interval, in CQI resource, do not detect that monitor terminal reports first estimate CQI value, base station using estimate CQI value raise an adjustment step-length as estimate CQI value and again by group's transmitting signaling downwards to the monitor terminal of group, until continue in very first time interval to detect that identical first estimates CQI value.
When judge in step 303 current CQI value higher than or equal to estimate CQI value time, monitor terminal not in CQI resource to base station feedback CQI value, if the CQI value reported by monitor terminal do not detected within second time interval of presetting, base station will be raised estimating CQI value, using estimate CQI value and adjustment step-length with value as the monitor terminal estimating CQI value and be also again handed down to group, until base station continues identical CQI value to be detected in very first time interval in CQI resource, and return execution step 306.
In the present embodiment, when the poor and base station of the channel quality of group's reality estimate CQI value higher time, CQI value is estimated according to first of feedback group actual channel quality in base station, downward is estimated CQI and is thought that group chooses the MCS exponent number corresponding with actual channel quality, so just pass through as the more RB of group allocation, promote the voice quality of monitor terminal in group, promote user's impression.
When group's reality channel quality better and base station estimate CQI value lower time, when base station does not detect the CQI value of feedback in Preset Time in CQI resource, can raise and estimate CQI and be again handed down to group, to obtain the target CQI mated with group actual channel quality, thus choose the MCS exponent number corresponding with actual channel quality for group, required RB can be reduced, can saving resource, improve the utilance of interface-free resources.
Embodiment four
The structural representation of a kind of base station that Fig. 4 provides for the embodiment of the present invention.As shown in Figure 4, this base station comprises: sending module 41, configuration module 42, adjusting module 43, determination module 44 and choose module 45.
Wherein, sending module 41, estimates channel quality indicator (CQI) value for being issued to group by group's signaling.
Configuration module 42, for periodically issuing configuration information to described group, described configuration information is used to indicate the CQI resource that group is configured for feedback CQI physically in row control channel PUCCH, to make described monitor terminal when estimating CQI value described in the current CQI value measured is less than, described CQI resource report first to estimate CQI value to described base station, wherein, described first estimate CQI value for described in estimate CQI value with adjustment step-length difference, described monitor terminal is in up motor synchronizing state.
The adjusting module 43 be connected with sending module 41 and configuration module 42, for detect in described CQI resource described first estimate CQI value after, by described estimate CQI value be adjusted to described first estimate CQI value and again by group's transmitting signaling downwards to the monitor terminal of described group.
The determination module 44 be connected with adjusting module 43, for detect in very first time interval lasting identical described first estimate CQI value time, estimate CQI value using current described first as the target CQI mated with described group actual channel quality.What be connected with determination module 44 chooses module 45, for according to the descending error rate of described target CQI value with the described group got, for described group chooses corresponding target MCS exponent number.
Further, when group's reality channel quality better and base station estimate CQI value lower time, i.e. the CQI value of monitor terminal actual measurement higher than or equal to estimate CQI value, herein monitor terminal not in CQI resource to base station feedback CQI value.Described adjusting module 43 first estimates CQI value also for not detecting in described CQI resource within second time interval that described monitor terminal reports, described base station using described estimate CQI value raise an adjustment step-length as described estimate CQI value and again by group's transmitting signaling downwards to the monitor terminal of described group, until detect that in described very first time interval identical described first estimates CQI value.Further, described determination module 44, also for also for estimating CQI value as the described target CQI mated with described group actual channel quality using continuing identical described first.
Further, the interval of the very first time described in the present embodiment is greater than described second time interval.Wherein, very first time interval is not less than 3 times of second time interval.
Further, described in choose module 45 specifically for obtaining the error rate of the downlink transfer of described group, be that described group chooses described target MCS exponent number according to described target CQI value and the described descending error rate.
In the present embodiment, base station to be issued to group by group's signaling and estimates CQI value, and periodically issue configuration information to group, with the CQI resource indicating group to be configured for feedback CQI in PUCCH, with make monitor terminal measure current CQI value be less than estimate CQI value time, first is reported to estimate CQI value in the CQI resource of configuration to base station, first estimate CQI value be estimate CQI value with adjustment step-length difference, monitor terminal is in up motor synchronizing state, if detect that in CQI resource first estimates CQI value, base station will be estimated CQI value and be adjusted to first and estimate CQI value, and be again handed down to the monitor terminal of group, if continue in very first time interval to detect that identical first estimates CQI value, CQI value is estimated as the target CQI corresponding with group actual channel quality in base station using current first, according to target CQI value and choosing and corresponding target MCS exponent number for group of getting.In the present embodiment, base station by configuring the resource of feedback CQI on PUCCH for group, when the CQI value of the actual measurement of monitor terminal be less than estimate CQI value time, feed back to base station on the resource, base station adjusts neatly according to this feedback and estimates CQI to obtain the target CQI value of mating with group actual channel quality, thus can choose suitable MCS exponent number for group.
Embodiment five
The structural representation of a kind of monitor terminal that Fig. 5 provides for the embodiment of the present invention.As shown in Figure 5, this monitor terminal comprises: receiver module 51 and sending module 52.
Wherein, receiver module 51, for receiving group's signaling that base station issues, that carries described group in described group signaling estimates channel quality indicator (CQI) value, and periodically receiving the configuration information that described base station issues, described configuration information is used to indicate the CQI resource that described monitor terminal is configured for feedback CQI physically in row control channel PUCCH.
The sending module 52 be connected with receiver module 51, for measure current CQI value be less than described in estimate CQI value time, described CQI resource report first to estimate CQI value to described base station, to make described base station, described CQI value of estimating is adjusted to described first and estimates CQI value, and the monitor terminal of described group is again given by group's transmitting signaling downwards, until continue identical described first CQI value to be detected in very first time interval in described CQI resource, and estimate CQI value using current described first as the target CQI value of mating with described group actual channel quality, the descending error rate according to described target CQI value and group is that described group chooses corresponding target MCS exponent number,
Wherein, described first estimate CQI for described in estimate CQI value with adjustment step-length difference, the monitor terminal in described group is in up motor synchronizing state.
In the present embodiment, what the monitor terminal reception base station in group issued estimates CQI value, in CQI resource, first is reported to estimate CQI value to base station when the current CQI value measured is less than and estimates CQI value, CQI value will be estimated to make base station to be adjusted to first and to estimate CQI value again send to monitor terminal, until continue in very first time interval to detect that identical first estimates CQI value, and to estimate CQI value using current first as the target CQI corresponding with group actual channel quality, and choose the target MCS exponent number corresponding with target CQI value for group.In the present embodiment, monitor terminal is fed back to base station in the CQI resource of configuration, base station is adjusted flexibly estimate CQI to obtain the target CQI value of mating with group actual channel quality, thus can choose suitable MCS exponent number for group.
Embodiment six
The structural representation of a kind of monitor terminal that Fig. 6 provides for the embodiment of the present invention six.As shown in Figure 6, this monitor terminal comprises outside receiver module 51 in above-described embodiment five and sending module 52, also comprises measurement module 53.
Further, described sending module 52, if also for current CQI value higher than or estimate CQI value described in equaling, described CQI resource does not report CQI value to described base station.
Correspondingly, if do not detect within second time interval of presetting reported by monitor terminal first estimate CQI value, base station will be raised estimating CQI value, using estimate CQI value and adjustment step-length with value as the monitor terminal estimating CQI value and be also again handed down to group, until base station continues in CQI resource in very first time interval to detect that identical first estimates CQI value, CQI value is estimated as the target CQI value of mating with group actual channel quality using continuing identical first in base station.
Further, described monitor terminal also comprises: measurement module 53 obtains described current CQI value for adopting the pre-coding matrix measurement of group.Particularly, the PMI that measurement module sends according to base station chooses pre-coding matrix, then adopts pre-coding matrix measurement to obtain current CQI value.
In the present embodiment, when group's reality channel quality better and base station estimate CQI value lower time, base station does not detect in CQI resource that in Preset Time first of feedback when estimating CQI value, can raise and estimate CQI and be again handed down to group, to obtain the target CQI mated with group actual channel quality, thus choose the MCS exponent number corresponding with actual channel quality for group, required RB can be reduced, can saving resource, improve the utilance of interface-free resources.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (12)
1. in group service, modulation and encoding scheme MCS dynamically select a rank method, it is characterized in that, comprising:
Base station to be issued to group by group's signaling and estimates channel quality indicator (CQI) value;
Described base station periodically issues configuration information to described group, described configuration information is used to indicate the CQI resource that described group is configured for feedback CQI physically in row control channel PUCCH, to make described monitor terminal when estimating CQI value described in the current CQI value measured is less than, described CQI resource report first to estimate CQI value to described base station, wherein said first estimate CQI value for described in estimate CQI value with adjustment step-length difference, described monitor terminal is in up motor synchronizing state;
If detect that in described CQI resource described first estimates CQI value, described CQI value of estimating is adjusted to described first and estimates CQI value by described base station, and is again given the monitor terminal of described group by described group transmitting signaling downwards;
If continue in very first time interval to detect that identical described first estimates CQI value, CQI value is estimated as the target CQI value of mating with described group actual channel quality in described base station using current described first;
Described base station according to described target CQI value and the error rate of described group that gets, for corresponding target MCS exponent number is selected by described group.
2. in group service according to claim 1, MCS dynamically selects rank method, it is characterized in that, also comprises:
If do not detect in described CQI resource within second time interval that described monitor terminal reports described first estimates CQI value, described base station using described estimate CQI value raise an adjustment step-length as described estimate CQI value and again by described group transmitting signaling downwards to the monitor terminal of described group, until continue in described very first time interval to detect that identical described first estimates CQI value;
CQI value is estimated as the described target CQI value of mating with described group actual channel quality using continuing identical described first in described base station.
3. in group service according to claim 2, MCS dynamically selects rank method, it is characterized in that, described very first time interval is greater than described second time interval.
4. in group service, modulation and encoding scheme MCS dynamically select a rank method, it is characterized in that, comprising:
Monitor terminal in group receives group's signaling that base station issues, and that carries described group in described group signaling estimates channel quality indicator (CQI) value;
Described monitor terminal periodically receives the configuration information that described base station issues, and described configuration information is used to indicate the CQI resource that described monitor terminal is configured for feedback CQI physically in row control channel PUCCH;
Described monitor terminal is when estimating CQI value described in the current CQI value measured is less than, described CQI resource report first to estimate CQI value to described base station, to make described base station, described CQI value of estimating is adjusted to described first and estimates CQI value, again the monitor terminal of described group is given by described group transmitting signaling downwards, until continue in described CQI resource in very first time interval to detect that identical described first estimates CQI value, and estimate CQI value using current described first as the target CQI value of mating with described group actual channel quality, be that described group chooses corresponding target MCS exponent number according to described target CQI value and the descending error rate of described group that gets,
Wherein, described first estimate CQI for described in estimate CQI value with adjustment step-length difference, described monitor terminal is in up motor synchronizing state.
5. in group service according to claim 4, MCS dynamically selects rank method, it is characterized in that, also comprises:
If current CQI value higher than or estimate CQI value described in equaling, described monitor terminal does not report first to estimate CQI value to described base station in described CQI resource.
6. in the group service according to claim 4 or 5, MCS dynamically selects rank method, it is characterized in that, also comprises:
Described monitor terminal adopts the pre-coding matrix measurement of described group to obtain described current CQI value.
7. a base station, is characterized in that, comprising:
Sending module, estimates channel quality indicator (CQI) value for being issued to described group by group's signaling;
Configuration module, for periodically issuing configuration information to described group, described configuration information is used to indicate the CQI resource that described group is configured for feedback CQI physically in row control channel PUCCH, to make described monitor terminal when estimating CQI value described in the current CQI value measured is less than, described CQI resource report first estimate CQI value to base station, wherein said first estimate CQI value for described in estimate CQI value with adjustment step-length difference, described monitor terminal is in up motor synchronizing state;
Adjusting module, for detect in described CQI resource described first estimate CQI value after, by described estimate CQI value be adjusted to described first estimate CQI value and again by described group transmitting signaling downwards to the monitor terminal of described group;
Determination module, for continue to detect in very first time interval identical described first estimate CQI value time, estimate CQI value using current described first as the target CQI mated with described group actual channel quality;
Choose module, for according to the descending error rate of described target CQI value with the described group got, for described group chooses corresponding target MCS exponent number.
8. base station according to claim 7, it is characterized in that, described adjusting module, also for not detecting in described CQI resource within second time interval that described monitor terminal reports first estimates CQI value, described base station using described estimate CQI value raise an adjustment step-length as described estimate CQI value and again by described group transmitting signaling downwards to the monitor terminal of described group, until detect that in described very first time interval lasting identical described first estimates CQI value;
Described determination module, also for estimating CQI value as the described target CQI mated with described group actual channel quality using continuing identical described first.
9. base station according to claim 8, is characterized in that, described very first time interval is greater than described second time interval.
10. a monitor terminal, is characterized in that, comprising:
Receiver module, group's signaling is issued for receiving base station, that carries described group in described group signaling estimates channel quality indicator (CQI) value, and periodically receiving the configuration information that described base station issues, described configuration information is used to indicate the CQI resource that described monitor terminal is configured for feedback CQI physically in row control channel PUCCH;
Sending module, in described CQI resource, first is reported to estimate CQI value to described base station what configure during for estimating CQI value described in being less than at the current CQI value measured, to make described base station, described CQI value of estimating is adjusted to described first and estimates CQI value, and the monitor terminal of described group is again given by described group transmitting signaling downwards, until continue in described CQI resource in very first time interval to detect that identical described first estimates CQI value, and estimate CQI value using current described first as the target CQI value of mating with described group actual channel quality, be that described group chooses corresponding target MCS exponent number according to described target CQI value and the descending error rate of described group that gets,
Wherein, described first estimate CQI for described in estimate CQI value with adjustment step-length difference, the monitor terminal in described group is in up motor synchronizing state.
11. monitor terminals according to claim 10, is characterized in that, described sending module, if also for current CQI value higher than or estimate CQI value described in equaling, described CQI resource does not report described first CQI value to described base station.
12. monitor terminals according to claim 10 or 11, is characterized in that, also comprise:
Measurement module, obtains described current CQI value for adopting the pre-coding matrix measurement of described group.
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