A kind of method and RNC in determining terminal feedback channel quality instruction period
Technical field
The present invention relates to channel quality indication feedback field more particularly to a kind of determining terminal feedback channel quality instruction weeks
The method and RNC of phase.
Background technique
High-speed slender body theory (HSDPA, High Speed Downlink Packages Access) technology is to realize
Wideband code division multiple access (Wide Code Division Multiple Access, WCDMA) network high-speed downlink data are improved to pass
The mostly important technology of defeated rate is that 3GPP puts forward in R5 agreement in order to meet the asymmetric demand of uplink and downlink data service
, it can greatly improve user's downstream data traffic on the basis of not changing the WCDMA system network structure built
Rate, the technology are that a kind of important technology of downlink capacity and data service rate is improved in WCDMA network construction.
In HSDPA, in order to realize bigger handling capacity on interface in the sky, to the function of base transceiver station (NodeB)
It can be carried out enhancing, introduced the concept of physical layer retransmission and fast resource schedule in NodeB level.By closer to aerial
Introduce these on the Node B of interface and there was only wireless network control center (RNC) function for just having originally, accelerate re-transmission with
And the efficiency to air resource scheduling.Meanwhile combining with adaptive modulation encoding (Adaptive Modulation and
Coding, AMC), the new technologies such as mixed automatic retransfer HARQ (Hybrid Automatic Repeat Request), use
The multi-code road of shorter Transmission Time Interval (Transmit Time Interval, TTI) length (2ms), fixed spreading factor
Transmission, to realize the packet data transmission ability of the high speed much higher than R99 in the downstream direction.
In order to realize the functional characteristic of HSDPA, three kinds of new physical channels are introduced in physical layer specification, such as Fig. 1 institute
Show.
(1) high-speed downlink shared channel HS-DSCH:On the uplink, the business datum of user is transmitted.Using solid
Fixed spreading factor SF=16, due to needing to common signal channel, downlink high-speed shared control channel HS-SCCH and relevant dedicated
Channel DCH reserves available channel code, so maximum available channel number is 15.Transmission Time Interval is defined as 2ms, is much smaller than
10ms, 20ms equal length specified in R99, to substantially reduce round-trip delay when data retransmit between terminal and NodeB.
(2) downlink high-speed shared control channel HS-SCCH:On the uplink, the dedicated signaling of HSDPA is transmitted, is such as passed
Transport format and system resource instruction etc.;Using fixed spreading factor SF=128, each terminal can at most monitor 4 simultaneously
HS-SCCH。
(3) High-Speed Dedicated Physical Control Channel HS-DPCCH:On uplink, feedback channel information (e.g., channel is sent
Quality indicator (CQI)) and transmission block transmission confirmation message (e.g., carrying the ACK/NACK information that HARQ process needs).User terminal
CQI information is obtained by measuring Primary Common Pilot Channel CPICH, the report cycle of CQI and mapping can be by net definitions.
The period of user terminal (UE) feedback CQI is defined in the TS25.331 of 3GPP.It is advised according to TS25.331 agreement
Fixed, wireless network side is specified in 0,2,4,8,10,20,40,80,160 (unit is millisecond) in the forward direction UE for starting HSDPA communication
Either one or two of, the CQI feedback period as UE.
How suitable CQI feedback period one hot issue is determined.The lesser CQI feedback period is specified to be conducive to for UE
HSDPA downlink throughput is improved, because NodeB scheduler can more accurately obtain the wireless environment that UE is presently in, and root
According to CQI value selection data block size, code channel number, modulation system and code channel power.But the lesser CQI feedback factor is
It is obtained using increasing ascending load as cost, because UE needs frequently to feed back present channel quality to NodeB scheduler, especially
Be when number of users is more, if multiple users feed back CQI simultaneously, such ascending load may be lifted it is very high, it is right in this way
Other users are all interference.At the same time, NodeB is also required to frequently demodulate CQI, occupies excessive NodeB demodulation in this way
Resource, and UE needs frequent measurement present channel quality, it is high which results in UE power consumptions, shorten UE it is standby when
Between.And be that UE specifies the biggish CQI feedback period, although being conducive to control ascending load, NodeB scheduler cannot be accurate
Acquisition UE the wireless environment being presently in, will cause downlink error code and residual error code be high, influence HSDPA downlink and handle up
Rate.
In addition, existing technical solution, once it is determined that CQI feedback period, UE can use always the CQI feedback period,
The CQI feedback period that UE can not be increased when ascending load is overweight can not reduce the CQI feedback week of UE when the ascending load free time
Phase is unfavorable for the reasonable utilization of resource.Even if needing to change the CQI feedback period of UE, according to the habitual thinking of this field, generally
Meeting issues radio chains to NodeB respectively by RNC the technical solution adopted is that during UE and NodeB carries out service interaction
Road reconfiguration prepares (Radio Link Reconfiguration Ready) message, issues radio bearer reconfiguration (Radio to UE
Bear Reconfiguration) message, the UE that this frequent interacting message may also will lead in service communication falls
Words influence user's impression.Technical solution also proposes between wireless network side and UE to reduce the interacting message eated dishes without rice or wine
Make an appointment it is a kind of change the CQI feedback period mode, i.e., in advance in the channel code set of HS-SCCH not using letter
Code corresponding CQI sending cycle in road is registered, and when needing to change the CQI feedback period, wireless network side is by changing
Become HS-SCCH channel code, for notifying UE to change the CQI feedback period, but this mode needs UE especially to support, is unsuitable for leading to
Communication scenes are of limited application.
Summary of the invention
The present invention provides the methods and RNC in a kind of determining terminal feedback channel quality instruction period, how more to realize
Add the technical issues of accurately determining the channel quality indication feedback period.
In order to solve the above technical problems, the present invention provides a kind of weeks of determining terminal feedback channel quality instruction (CQI)
The method of phase, the method includes:
Wireless network control center (RNC) determines the period of terminal feedback channel quality instruction (CQI) according to ascending load;
The period increases with the increase of ascending load;
The RNC is by terminal described in determining CQI feedback periodic notification.
The method further includes:
The RNC determines the period of terminal feedback CQI according to ascending load at that time when terminal accesses every time.
The method further includes:
If the ascending load is less than 50%, the period for the terminal feedback CQI that RNC is determined is 2ms;
If the ascending load is greater than or equal to 50%, and simultaneously less than 75% when, terminal feedback CQI that RNC is determined
Period is 8ms;
If the ascending load is greater than or equal to 75%, the period for the terminal feedback CQI that RNC is determined is 20ms.
The method also includes:
Before the RNC determines the period of terminal feedback CQI according to ascending load, according to the end in pre-determining CQI feedback period
The dispatching priority instruction (SPI) at end judges whether the terminal is important (VIP) terminal;If the terminal is VIP terminal, determining should
The CQI feedback period of terminal is its default value;If the terminal is non-VIP terminal, determine that terminal feeds back CQI according to ascending load
Period.
The determining CQI feedback period is sent to the terminal by the RNC:
The determining CQI feedback period is handed down to base station (NodeB) scheduler when wireless link reconfigured by the RNC, together
When the determining CQI feedback period is handed down to the terminal when radio bearer is established.
In order to solve the above technical problems, the present invention also provides a kind of determining terminal feedback channel quality instructions (CQI)
The wireless network control center (RNC) in period, the RNC include feedback cycle determining module and CQI feedback periodic notification module,
Wherein:
The feedback cycle determining module, for determining terminal feedback channel quality instruction (CQI) according to ascending load
Period, the period increase with the increase of ascending load, and the determining terminal feedback CQI period is sent to CQI feedback week
Phase notification module;
The CQI feedback periodic notification module, after getting the determining terminal feedback CQI period, by the determination
Terminal feedback CQI periodic notification described in terminal.
Further, the feedback cycle determining module, for when terminal accesses every time, according to uplink at that time
Load the period for determining terminal feedback CQI.
Further, the feedback cycle determining module, for when ascending load is less than 50%, determining that terminal is fed back
The period of CQI is 2ms;Ascending load be greater than or equal to 50%, and simultaneously less than 75% when, determine terminal feedback CQI week
Phase is 8ms;When ascending load is greater than or equal to 75%, determine that the period of terminal feedback CQI is 20ms.
Further, the RNC further includes important (VIP) terminal judgment module;
The VIP terminal judgment module, for indicating that (SPI) judges the pre-determining CQI feedback period according to dispatching priority
Terminal whether be important (VIP) terminal, and judging result is notified into the feedback cycle determining module;
The feedback cycle determining module is also used to when the terminal for learning the pre-determining CQI feedback period is VIP terminal,
The period for determining terminal feedback CQI is its default value;When the terminal for learning the pre-determining CQI feedback period is non-VIP terminal,
The period of terminal feedback CQI is determined according to ascending load;And the determining terminal feedback CQI period is sent to CQI feedback week
Phase notification module.
Further, the CQI feedback periodic notification module, for when wireless link reconfigured by determining CQI feedback
Period is handed down to base station (NodeB) scheduler, while when radio bearer is established being handed down to the determining CQI feedback period described
Terminal.
Above-mentioned technical proposal, wireless RNC determines the period of terminal feedback CQI according to ascending load, so that terminal feeds back CQI
Period and uplink load situation be adapted;And above-mentioned technical proposal is determined eventually when terminal accesses every time using RNC
In the period of end feedback CQI, compared with the prior art, the CQI feedback period for avoiding terminal acquisition is unalterable, and terminal is connecing
It is fashionable just know its feed back CQI period also avoid terminal know in service communication its feed back CQI period and caused by eventually
Special Handle of Drop Question is held, user's impression is improved.
Detailed description of the invention
Fig. 1 is that the determination channel quality of the present embodiment indicates the method flow diagram of (CQI) feedback cycle;
Fig. 2 is the method flow diagram that the exemplary determining channel quality of this application indicates (CQI) feedback cycle;
Fig. 3 is that the determination channel quality of the present embodiment indicates the RNC comprising modules figure of (CQI) feedback cycle.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention
Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application
Feature can mutual any combination.
Fig. 1 is that the determination channel quality of the present embodiment indicates the method flow diagram of (CQI) feedback cycle.
S101 wireless network control center (RNC) determines terminal feedback channel quality instruction (CQI) according to ascending load
Period, the period increase with the increase of ascending load;
The wireless environment for being presently in terminal when determining the CQI feedback period in step S101, can as Consideration
To realize the CQI feedback period for increasing terminal when ascending load is overweight, reduce the CQI feedback of terminal when the ascending load free time
Period so that feedback CQI This move had not only been able to satisfy RNC to the measurement demand of present channel, but also will not raise wages to the solution of NodeB
Cause excessive consumption in source.
Ascending load and the corresponding relationship in the period of terminal feedback CQI can be as shown in table 1.
Table 1
Above-mentioned RNC can determine the week of terminal feedback CQI according to ascending load at that time when terminal accesses every time
Phase, with guarantee CQI feedback period that terminal is got be not it is unalterable, compared with the prior art, the CQI of terminal feedback is not only
Actual channel circumstance is more realistically reflected, and terminal just knows that the period of its feedback CQI avoids terminal in access
Know in service communication its feed back CQI period and caused by terminal Special Handle of Drop Question, improve user impression.
Above-mentioned RNC can also be before the period for determining terminal feedback CQI according to ascending load, according to the dispatching priority of the terminal
Grade instruction (SPI) judges whether the terminal is important (VIP) terminal, and wherein the value range of SPI is [0,15];If the end
End is VIP terminal, it is determined that the CQI feedback period of the terminal is its default value;If the terminal is non-VIP terminal, continue
The period of terminal feedback CQI is determined according to ascending load.In this way, guaranteeing that it is cumbrous that feedback CQI will not make Internet resources
Meanwhile also ensuring the impression of VIP user.
The S102 RNC is by terminal described in determining CQI feedback periodic notification;
RNC can by the way that the determining CQI feedback period is handed down to base station (NodeB) scheduler when wireless link reconfigured,
The determining CQI feedback period is handed down to the terminal when radio bearer is established simultaneously, the CQI feedback periodic notification method is not
It needs terminal especially to support, suitable for general communication scenes, has a wide range of application.
Fig. 2 is the method flow diagram that the exemplary determining channel quality of this application indicates (CQI) feedback cycle.
S201 accesses wireless network by uplink common channel in terminal, after authentication, safe mode, core net (CN)
Radio access bearer (RAB), which is issued, to RNC assigns (RAB ASSIGNMENT REQUEST) message, carried terminal in the message
Transport-type (Traffic Class, TC), divides at transmission process priority (Traffic Handling Priority, THP)
With/retain priority (Allocation/Retention Priority, ARP);
S202:After RNC receives RAB assignment messages, according to TC, THP and the ARP carried in message, reflected by certain
The relationship of penetrating finds the SPI of the terminal;
S203:RNC judges whether the terminal is VIP user according to SPI, if SPI is more than or equal to 14, illustrates that the terminal is
VIP user executes step S208, no to then follow the steps S204;
S204:RNC determines the CQI feedback period of terminal according to uplink load situation, when RNC judges that current ascending load is small
In 50%, step S205 is executed;When RNC judges that current ascending load more than or equal to 50%, and less than 75%, executes step
S206;When RNC judges that current ascending load more than or equal to 75%, executes step S207;
Usual situation, when uplink zero load, with reference to receiving total bandwidth (Refer Receive total wide band
It power) is -106dBm.
S205:When RNC judges current ascending load less than 50%, bottom, which makes an uproar to be lifted, at this time is less than 3dB, i.e. uplink RTWP (connects
By total bandwidth Receive total wide band power) be less than -103dBm when, determine that the CQI feedback period of terminal is
2ms executes step S209;
S206:When RNC judges that current ascending load is greater than or equal to 50%, and less than 75%, i.e. uplink RTWP be greater than or
Equal to -103dBm, and be less than -100dBm when, determine terminal the CQI feedback period be 8ms, execute step S209;
S207:When RNC judges that current ascending load is greater than or equal to 75%, i.e. uplink RTWP is greater than or equal to -100dBm
When, it determines that the CQI feedback period of terminal is 20ms, executes step S209;
S208:RNC determines that the CQI feedback period of the terminal is its default value, such as 2ms;
S209:The determining CQI feedback period is handed down to NodeB scheduler when wireless link reconfigured by RNC, while in nothing
The determining CQI feedback period is handed down to terminal by (Radio Bear Setup) when line carrying is established;
S210:Terminal gives NodeB scheduler according to the CQI feedback period timing feedback CQI received.
Fig. 3 is that the determination channel quality of the present embodiment indicates the RNC comprising modules figure of (CQI) feedback cycle.
The RNC includes feedback cycle determining module and CQI feedback periodic notification module, wherein
Feedback cycle determining module, for determining the period of terminal feedback channel quality instruction (CQI) according to ascending load,
The period increases with the increase of ascending load, and the determining terminal feedback CQI period is sent to CQI feedback periodic notification
Module;Such as, when ascending load is less than 50%, determine that the period of terminal feedback CQI is 2ms;It is greater than or equal in ascending load
50%, and simultaneously less than 75% when, determine terminal feedback CQI period be 8ms;When ascending load is greater than or equal to 75%,
The period for determining terminal feedback CQI is 20ms;
The feedback cycle determining module can determine terminal according to ascending load at that time when terminal accesses every time
Feed back the period of CQI;
CQI feedback periodic notification module, after getting the determining terminal feedback CQI period, by the end of the determination
Terminal described in the feedback CQI periodic notification of end;
Specific notification procedure can be:CQI feedback periodic notification module gets the determining terminal feedback CQI period
Afterwards, the determining CQI feedback period is handed down to base station (NodeB) scheduler when wireless link reconfigured, while in radio bearer
The determining CQI feedback period is handed down to the terminal when establishing.
In addition to above-mentioned module, RNC may also include important (VIP) terminal judgment module, for being indicated according to dispatching priority
(SPI) (SPI ∈ [0,15]) judges whether the terminal in pre-determining CQI feedback period is important (VIP) terminal, and by judging result
Notify the feedback cycle determining module;Such as, [14,15] SPI ∈, the terminal in pre-determining CQI feedback period are VIP terminal, SPI
∈ [0,14), the terminal in pre-determining CQI feedback period is non-VIP terminal;
Feedback cycle determining module at this time, it is also necessary to the terminal for learning the pre-determining CQI feedback period be VIP terminal
When, determine that the CQI feedback period of the terminal is its default value;It is non-VIP terminal in the terminal for learning the pre-determining CQI feedback period
When, the period of terminal feedback CQI is determined according to ascending load;And the determining terminal feedback CQI period is sent to CQI feedback
Periodic notification module.
Those of ordinary skill in the art will appreciate that all or part of the steps in the above method can be instructed by program
Related hardware is completed, and described program can store in computer readable storage medium, such as read-only memory, disk or CD
Deng.Optionally, one or more integrated circuits also can be used to realize, accordingly in all or part of the steps of above-described embodiment
Ground, each module/unit in above-described embodiment can take the form of hardware realization, can also use the shape of software function module
Formula is realized.The present invention is not limited to the combinations of the hardware and software of any particular form.
It should be noted that the invention may also have other embodiments, without departing substantially from spirit of that invention and its essence
In the case of, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these are corresponding
Change and modification all should fall within the scope of protection of the appended claims of the present invention.