CN102111855A - Communication system and method for updating system information in communication system - Google Patents
Communication system and method for updating system information in communication system Download PDFInfo
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- CN102111855A CN102111855A CN2009102525412A CN200910252541A CN102111855A CN 102111855 A CN102111855 A CN 102111855A CN 2009102525412 A CN2009102525412 A CN 2009102525412A CN 200910252541 A CN200910252541 A CN 200910252541A CN 102111855 A CN102111855 A CN 102111855A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0235—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a power saving command
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a communication system and a method for updating system information in the communication system. The communication system comprises a control station and a subordinate station. The control station adjusts a transmission parameter or a transmission manner of the altered or all the system information in an active way or in a passive way; the control station transmits the altered or all the system information to one or more subordinate stations according to the adjusted transmission parameter or the transmission manner. The subordinate station receives and reads the system information. By application of the invention, the subordinate station is capable of acquiring, or acquiring as fast as possible and applying the up-to-date system configuration information or parameter, the normal work of the subordinate station in a wake-up mode or a sleep mode when the system configuration information or parameter is altered is guaranteed, and the system performance is improved.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to the update method of system information in a kind of communication system and the communication system.
Background technology
In wireless communication system, control station (for example base station) is an elementary cell of forming the radio honeycomb sub-district, finish communication and management function between mobile radio communication and the mobile communication subscriber, it communicates by Uplink/Downlink and subordinate station (for example terminal), wherein, the descending control station that is meant arrives the direction at subordinate station, and the stand direction of control station of the up subordinate of being meant.A plurality of subordinaties station can send data to control station simultaneously by up link, also can receive data from control station simultaneously by down link.Adopting control station to realize in the wireless communication system of wireless resource scheduling control, the scheduling of system wireless resource distributes to be finished by control station.
In wireless communication system, can finish cell selecting and system's access in a kind of mode efficiently in order to guarantee that the subordinate stands, control station need utilize the system configuration information relatively more crucial on the periodic transmitting time of downlink broadcast control channel of system or the set of parameter usually, the for example use of superframe head (Super-Frame Header is called for short SFH) in the 802.16m system.According to the difference of operation scenario, operator's possibility some system configuration information of irregular change or parameter, and during this period, the subordinate stands and need upgrade and use these necessary system configuration information or parameters timely, in order to avoid influence its normal transfer of data.
In addition, in order to realize purpose of energy saving, all provide dormancy (Sleep) pattern in most mobile or wireless communication protocols; The purpose of this park mode is to reduce the energy consumption at mobile subordinate station, and reduces the use to the service control station air interface resource.Wherein, the Sleep pattern is that the subordinate stands in the designated period of consulting in advance, supspend a kind of state of service control station service, promptly in the sleeping window at the mobile subordinate station under being in the Sleep pattern, control station can not given described subordinate the station by any type of downlink business of clean culture.
For most wireless communication system, be relatively-stationary the dispatching cycle of system configuration information or parameter, for example system information is broadcasted in SFH in the 802.16m system, wherein, the superframe head is divided into main superframe head (Primary-SFH again, be called for short P-SFH) and auxilliary superframe head (Secondary-SFH is called for short S-SFH); Wherein, S-SFH is further divided into a plurality of son bags again, for example, son bag 1 (SP1) is to son bag 3 (SP3), most system information sends in these three the son bags of S-SFH, and this a little bag is not that each superframe has, and specifically sends the dispatching cycle that this a little bag depends on the predefined different son bags of control station where.
Therefore, carry out the reproducting periods of system configuration information or parameter at control station, the decoding error because the subordinate stands, or the restriction of described system configuration information or parameter dispatching cycle, and the subordinate is stood can not in time receive and use system configuration information or parameter after the change, finally may influence the normal data interaction between itself and control station; In addition, the renewal of described system configuration information or parameter may occur in during the sleeping window at the one or more subordinaties station that is under the Sleep pattern, at this moment, described subordinate can't carry out the renewal of system configuration information or parameter in the station, finally cause described subordinate to stand in ensuing intercepting (Listening) window and can't obtain up-to-date system configuration information or parameter as early as possible, thereby also may influence the operate as normal that the subordinate stands.
Summary of the invention
Technical problem to be solved by this invention is, the update method of system configuration information in a kind of communication system and the communication system is provided, in order to solving the system configuration information after in the prior art because subordinate station can't in time receive and use change, and cause the subordinate stand can't operate as normal problem.
In order to address the above problem, the present invention proposes a kind of update method that is used for the communication system system information, comprise the steps:
Control station adopts initiatively or the mode of passive adjustment, and the transmission parameter or the send mode of system informations after changing or all are adjusted;
Control station is according to adjusted transmission parameter or send mode is after one or more subordinaties stand the transmission change or all system informations.
Further, described control station is after definite system information changes, and adopts the mode of initiatively adjusting, and the transmission parameter of the system information after changing is adjusted.
Whether further, described control station is by judging, when described system information changes, exist one or more subordinaties station to be in the sleep window under the sleep pattern, determines the described duration of initiatively adjusting mode of employing;
The mode of initiatively adjusting that described control station adopts comprises: control station is adjusted dispatching cycle or the transmission frequency and/or the code rate of described system information during the listen window at described one or more subordinaties station or beyond the listen window.
Further, when described control station adopted the mode of passive adjustment, control station was according to the feedback information from the subordinate station, and the transmission parameter or the send mode of system informations after changing or all are adjusted; Wherein, described feedback information comprises: channel quality indication (CQI) information and/or system information are upgraded the indication information of failure.
Further, described update method further comprises: described feedback information is the indication information that system information is upgraded failure;
The subordinate stands under the condition that can not be correctly decoded the system configuration information that changes or parameter, and perhaps the subordinate station is waken the back up from sleep window and found that system information changes, and then feeds back the indication information that described system information is upgraded failure to control station;
Described control station is adjusted dispatching cycle or the transmission frequency and/or the code rate of described system information according to the stand indication information of renewal failure of feedback of the correct subordinate who receives; Perhaps, stand to the subordinate and send the clean culture or the broadcast of the system information after comprising change.
Further, the ascending physical signal control channel of described subordinate station by sharing, and/or medium access control message is upgraded the failure indication information to the control station feedback; Described renewal failure indication information comprises system configuration information or parameter and/or the subordinate information of standing.
Further, described update method further comprises: described feedback information is a channel quality indication (CQI) information;
Subordinate station is according to the feedback request of control station, the feedback message by long-term or short-term to the control station report sometime the channel quality at interval indicate (CQI) information;
Control station is collected the described interior at interval sometime CQI feedback information from a plurality of different subordinaties station, and calculates according to these CQI feedback informations, and dispatching cycle or the transmission frequency and/or the code rate of table look-up output system configuration information this moment or parameter;
Control station is according to the dispatching cycle or the transmission frequency of output, and/or code rate is stood to the subordinate and sent follow-up system configuration information or parameter.
Wherein, described control station is determined dispatching cycle or transmission frequency according to channel quality indication (CQI) feedback information at subordinate station according to following steps, and/or code rate:
Control station obtains described subordinate and stands in interior feedback number of times (n) of particular time interval and corresponding C QI feedback index (Idx), obtains described subordinate and stands in interior average CQI feedback index (Idx of the described time interval
Avr);
Obtain stand average CQI feedback index (Idx in each comfortable particular time interval of m subordinate
Avr1, Idx
Avr2..., Idx
Avrm), and obtain all subordinaties and stand in average CQI feedback index (IDX in the described time interval
Avr);
The control station utilization is through rounding the average CQI feedback index (IDX of operation
Avr), carry out table lookup operation according to specific mapping form, the long-term dispatching cycle or the transmission frequency of output system information, and/or code rate.
Further, described transmission parameter comprises: dispatching cycle or transmission frequency and/or code rate.
Further, described system information comprises being used for system configuration information or the parameter that network is reentried, network initially enters and network is found.
Further, described control station comprises following one or more network elements: grand control station, microcontroller station, slight control station, relay station; Described subordinate station comprises following one or more network elements: terminal, relay station, microcontroller station, control station slightly.
The present invention also provides a kind of communication system, comprising:
Control station adopts initiatively or the mode of passive adjustment, and the transmission parameter or the send mode of system informations after changing or all are adjusted; Stand to one or more subordinaties according to adjusted transmission parameter or send mode and to send after changing or all system informations;
The subordinate station is used for receiving and understanding system information.
Further, described subordinate station, also be used under the condition that can not be correctly decoded the system configuration information that changes or parameter, perhaps the subordinate station is waken the back up from dormancy (Sleep) window and is found that system configuration information or parameter change, and then feeds back the indication information of described system configuration information or parameter update failure to control station;
Correspondingly, described control station adopts the mode of passive adjustment, according to the stand indication information of renewal failure of feedback of the subordinate of correct reception, adjusts dispatching cycle or the transmission frequency and/or the code rate of described system information; Perhaps, stand to the subordinate and send the clean culture or the broadcast of the system information after comprising change.
Further, described subordinate station also is used for the feedback request according to control station, the feedback message by long-term or short-term to the control station report sometime the channel quality at interval indicate (CQI) information;
Correspondingly, described control station also is used to adopt the mode of passive adjustment, collect described sometime at interval in from the CQI feedback information at a plurality of different subordinaties station, and calculate and dispatching cycle or the transmission frequency and/or the code rate of table look-up output system configuration information this moment or parameter according to these CQI feedback informations; Control station is according to the dispatching cycle or the transmission frequency of output, and/or code rate is stood to the subordinate and sent follow-up system configuration information or parameter.
By above-mentioned at least one scheme of the present invention, control station is by carrying out the reproducting periods of system configuration information or parameter at wireless network, perhaps between the Listening window phase at one or more subordinaties station, adjust the dispatching cycle or the transmission frequency of described system configuration information or parameter, and/or code rate, the subordinate is stood to obtain or fast as far as possible obtain and use up-to-date described system configuration information or parameter, thereby solved in the prior art owing to the subordinate station can't in time receive system configuration information after the change or parameter cause the subordinate stand can't operate as normal problem, guaranteed to be in wake up or park mode under the subordinate stand in operate as normal under the situation of system configuration information or parameter change, improved systematic function.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.
Fig. 1 is the flow chart according to the update mode of first kind of system configuration information of the embodiment of the invention or parameter;
Fig. 2 is to be the schematic diagram of the renewal process of first kind of system configuration information of example or parameter with the 802.16m system;
Fig. 3 is the flow chart according to the update mode of second kind of system configuration information of the embodiment of the invention or parameter;
Fig. 4 is the flow chart according to the update mode of the third system configuration information of the embodiment of the invention or parameter;
Fig. 5 is according to the algorithm flow chart of determining best transmission frequency or dispatching cycle and/or code rate in the third update mode of the embodiment of the invention according to CQI.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
In prior art, the decoding error or be in park mode because the subordinate stands, or because the restriction of system configuration information or parameter dispatching cycle, and the subordinate is stood in time to receive and to use system configuration information or parameter after the change, thereby cause the subordinate stand can't operate as normal problem, the embodiment of the invention provides the update method of system configuration information in a kind of communication system and the communication system or parameter.
In the present invention, when control station was determined to need to change its system configuration information or parameter, described control station increased the transmission frequency of corresponding system configuration information or parameter automatically, perhaps reduces the dispatching cycle of corresponding system configuration information or parameter; When perhaps the subordinate station can't be correctly decoded system configuration information or parameter, feed back the indication information of described system configuration information or parameter update failure to control station, the transmission frequency of control station Adjustment System configuration information or parameter or dispatching cycle, and/or code rate, the perhaps send mode of Adjustment System configuration information or parameter; Perhaps control station is adjusted the dispatching cycle or the transmission frequency of described system configuration information or parameter based on the CQI feedback of the long-term or short-term of standing from a plurality of subordinaties, and/or code rate.
The present invention is used for the update method of communication system system information, comprises the steps:
After control station determines that system information changes, adopt the mode of initiatively adjusting, the transmission parameter of the system information after changing is adjusted; Perhaps adopt the mode that feedback information adjusts of standing, the transmission parameter or the send mode of system informations after changing or all are adjusted according to the subordinate;
Control station is according to adjusted transmission parameter or send mode is after the subordinate stands the transmission change or all system informations.
Wherein, described transmission parameter comprises: dispatching cycle or transmission frequency and/or code rate.
Wherein, described system information comprises system configuration information or parameter, for example is used for that network is reentried, network initially enters and network is found and the system configuration parameter of other necessity.
Communication system of the present invention comprises:
Control station is used for after definite system information changes, and adopts the mode of initiatively adjusting, and the transmission parameter of the system information after changing is adjusted; Perhaps adopt the mode that feedback information adjusts of standing, the transmission parameter or the send mode of system informations after changing or all are adjusted according to the subordinate; Stand to the subordinate according to adjusted transmission parameter or send mode and to send after changing or all system informations.
The subordinate station is used for receiving and understanding system information.
Further, described subordinate station, also be used under the condition that can not be correctly decoded the system configuration information that changes or parameter or the subordinate station is waken the back up from the Sleep window and found that system configuration information or parameter change, then feed back the indication information of described system configuration information or parameter update failure to control station.Correspondingly, described control station according to the stand indication information of renewal failure of feedback of the subordinate of correct reception, is adjusted dispatching cycle or the transmission frequency and/or the code rate of described system information; Perhaps, stand to the subordinate and send the clean culture or the broadcast of the system information after comprising change.
Further, described subordinate station also is used for the feedback request according to control station, the feedback message by long-term or short-term to the control station report sometime the channel quality at interval indicate (CQI) information.Correspondingly, described control station also be used to collect described sometime at interval in from the CQI feedback information at a plurality of different subordinaties station, and calculate and dispatching cycle or the transmission frequency and/or the code rate of table look-up output system configuration information this moment or parameter according to these CQI feedback informations; Control station is according to the dispatching cycle or the transmission frequency of output, and/or code rate is to subordinate stand transmitting system configuration information or parameter.
The update method of system information of the present invention, the difference according to the mode of adjustment can be divided into three kinds of update modes.
First kind of update mode:
Control station adopts first kind of update mode to adjust the transmission parameter of described system information under following two kinds of situations, comprising:
First kind of situation carried out the reproducting periods of system configuration information or parameter at network side, and control station adopts adjustment mode initiatively to adjust dispatching cycle or the transmission frequency and/or the code rate of described system configuration information or parameter;
The reproducting periods of described system configuration information or parameter is meant the time range of being controlled by the one or more timer in the control station; Wherein, described time range be meant from moment that system configuration information or parameter change until up-to-date system configuration information or parameter all is applied to institute's elapsed time the system.
Second kind of situation, when network side system configuration information or parameter change, and the one or more subordinaties station in the network is in the Sleep window, then control station adopts initiatively adjustment mode, during the listen window at ensuing described one or more subordinaties station or beyond the listen window, adjust dispatching cycle or the transmission frequency and/or the code rate of described system configuration information or parameter.
Further, above-mentioned control station is adjusted dispatching cycle or the transmission frequency and/or the code rate of described system configuration information or parameter, comprising:
Increase the transmission frequency of system configuration information or parameter or the dispatching cycle of reducing system configuration information or parameter; Wherein, described system configuration information or parameter are meant current system configuration information that changes or parameter.
Second kind of update mode
The subordinate stands under the condition that can not be correctly decoded the system configuration information that changes or parameter, after perhaps wake up from sleeping window at the subordinate station, find that system configuration information or parameter change, then feed back the indication information of described system configuration information or parameter update failure to control station;
Control station is when the described feedback indication information that correctly receives from subordinate station, control station can increase the transmission frequency of corresponding system configuration information or parameter, perhaps reduce the dispatching cycle of corresponding system configuration information or parameter, perhaps stand to the subordinate and send system configuration information or the clean culture of parameter or the message of broadcasting after comprising change, the associative operation of perhaps carrying out other is notified the subordinate stand system configuration information or parameter after changing.
Wherein, described subordinate station can comprise to the renewal failure indication information of control station feedback: system configuration information or parameter, and/or subordinate's information of standing.
Wherein, after described subordinate wakes up from sleeping window at the station, change, can feed back described renewal failure indication information to control station in listen window if find system configuration information or parameter.
Wherein, described subordinate station comprises following one of dual mode at least or their combination to the renewal failure indication information that control station feeds back described system configuration information or parameter:
The subordinate station can be fed back to control station by the ascending physical signal control channel of sharing (such as reserve a code word in the Ranging channel); Or,
The subordinate can feed back to control station by medium access control (MAC) message at the station.
The third update mode
Step 1, subordinate station be according to the feedback request of control station, the feedback message by long-term or short-term to the control station report sometime the channel quality at interval indicate (CQI) information;
Step 2, control station are collected the described interior at interval sometime CQI feedback information from a plurality of different subordinaties station, and with the input of these CQI feedback informations merging as a certain algoritic module;
Step 3, the system configuration information of described algoritic module output the best this moment or the dispatching cycle or the transmission frequency of parameter, and/or code rate.
Step 4, control station are adjusted the dispatching cycle or the transmission frequency of described system configuration information or parameter, and/or code rate, and according to the dispatching cycle or the transmission frequency of algoritic module output, and/or code rate is to subordinate stand transmitting system configuration information or parameter.
Wherein, control station is adjusted the dispatching cycle or the transmission frequency of described system configuration information or parameter, and/or code rate, comprising: increase or reduce the dispatching cycle or the transmission frequency of described system configuration information or parameter, and/or code rate.
Wherein, described code rate is meant the product of original coding speed and number of repetition; The code rate that increases or reduce described system configuration information or parameter comprises: the original coding speed and/or the number of repetition that increase or reduce described system configuration information or parameter.
Wherein, described system configuration information or parameter comprise: be used for network and reentry, network initially enters the system configuration parameter with network discovery and other necessity.
In above-mentioned three kinds of update modes, control station can increase the transmission frequency of corresponding system configuration information or parameter, perhaps reduce the dispatching cycle of corresponding system configuration information or parameter, perhaps stand and send the message of the clean culture or the broadcasting that comprise recent systems configuration information or parameter to the subordinate, can guarantee to be in subordinate under the awakening mode and stand in described system configuration information or parameter and repeatedly receive system update message or signaling before coming into force, thereby increase the stand probability of system configuration information or the parameter of successfully obtaining change of described subordinate from control station; Simultaneously, can guarantee to be in subordinate under the Sleep pattern stands in and obtains and use up-to-date described system configuration information or parameter soon as far as possible in its listening interval.
Under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
Below respectively above-mentioned three kinds of update modes are described in detail in conjunction with the accompanying drawings.
Embodiment one
Control station is adjusted the dispatching cycle or the transmission frequency of corresponding system configuration information or parameter in both cases, and Fig. 1 is the flow chart according to the update mode of first kind of system configuration information of the embodiment of the invention or parameter.As shown in Figure 1, mainly may further comprise the steps according to the system configuration information of the embodiment of the invention or the update method of parameter:
Step S101: based on certain strategy, control station is determined to change its part or all of system configuration information or parameter, determines a particular time interval (T) simultaneously;
Step S102: control station determines to be in this moment all the interior subordinaties stations of sleeping window under the Sleep pattern, calculates each subordinate station (i) simultaneously and begins to need elapsed time (Ti) till starting its listen window from current time;
Step S103: control station is from above-mentioned all time interval (T
i) in choose wherein maximum time (T at interval
Max);
Step S104: control station is at particular time interval (T+T
Max) the interior system configuration information of change or the transmission frequency of parameter of increasing;
Step S105: through the above-mentioned time interval (T+T
Max) afterwards, control station reduces the transmission frequency of described system configuration information or parameter, and return to original transmission frequency.
With reference to the update mode of present embodiment, also can adjust dispatching cycle or adjust transmission frequency and code rate, perhaps adjust dispatching cycle and code rate.
Embodiment two
In specific implementation process, the example that is updated to the system configuration information of 802.16m or parameter as shown in Figure 2, further specifies the specific implementation process of first kind of update mode again.
Suppose that in the auxilliary superframe head (S-SFH): the initial schedule cycle of son bag 1 (SP1) is 2 superframes; The initial schedule cycle of son bag 2 (SP2) is 4 superframes; The initial schedule cycle of son bag 3 (SP3) is 4 superframes.In addition, the subordinate stand 1 with the subordinate stand 2 works at present in the Sleep pattern.
Particularly, the renewal process of its system configuration information or parameter may further comprise the steps:
Step 201, control station are determined need be in system configuration information or the parameter in n superframe change bag 2, the son bag 3, and definite simultaneously particular time interval is T.
Particularly, control station can change son bag 1 as required, son bag 2, and any one in the son bag 3 or two son bags perhaps change these three son bags simultaneously.
Particularly, described time interval T is meant, by the control station decision from time that system configuration information or parameter change and experienced when finally being applied to the system.
Step 202, control station are determined to be in this moment under the Sleep pattern station of the subordinate in the sleeping window and 1 are stood 2 with the subordinate for the subordinate stands, and the subordinate stands 1 since n superframe, needs through 1 superframe (T till its listen window of startup
1), and the subordinate stands 2 since n superframe, needs through 2 superframe (T till starting its listen window
2).
Particularly, n the initial moment of superframe, may not have the station of the subordinate in the sleeping window under any Sleep of being in pattern, this moment is skips steps 202 directly; Perhaps there is the subordinate station that is in more than three or three in the sleeping window.
Particularly, the subordinate station needs elapsed time since n the initial moment of superframe till starting its listen window may not be an integer superframe (1 superframe comprises 4 radio frames), but an integer radio frames, therefore, the unit in the described time interval can be superframe or radio frames.
Step 203, control station from step 202 draw corresponding to the subordinate stand 1 with stand 2 the time interval (T of subordinate
1With T
2) in choose wherein maximum time (T at interval
2).
Step 204, control station is at the time interval (T+T of 7 802.16m superframes (28 radio frames just)
2) the interior system configuration information of change or the transmission frequency of parameter (described son bag 2 and son wrap 3) of increasing; Particularly, the instantaneous dispatching cycle of son bag 1 is identical with the initial schedule cycle, all changes into 2 superframes the instantaneous dispatching cycle of son bag 2 and son bag 3.
Step 205, the time interval of determining through step 204 (from n superframe to n+6 superframe), control station reduced son bag 2 and sub 3 the transmission frequency of wrapping afterwards; Particularly, full recovery dispatching cycle of son bag 2 and son bag 3 is 4 initial superframes.
Embodiment three
In this embodiment, the subordinate stands under the condition that can not be correctly decoded the system configuration information that changes or parameter, when perhaps the subordinate station finds that after sleeping window wakes up system configuration information or parameter change, feed back the indication information of described system configuration information or parameter update failure to control station;
When control station correctly receives described feedback indication information from subordinate station, control station can increase the transmission frequency of corresponding system configuration information or parameter, perhaps reduce the dispatching cycle of corresponding system configuration information or parameter, perhaps stand and send the message of the clean culture or the broadcasting that comprise recent systems configuration information or parameter, perhaps carry out other associative operation to the subordinate.
Fig. 3 is the flow chart according to the update mode of second kind of system configuration information of the embodiment of the invention or parameter; Mainly may further comprise the steps according to the system configuration information of the embodiment of the invention or the update method of parameter:
Step S301: the subordinate stands and determines system configuration information or the parameter that it can not correct decoding changes, and perhaps the subordinate station is waken the back up from sleeping window and found that system configuration information or parameter change;
Step S302: the information of described system configuration information or parameter update failure is fed back by ascending physical signal control channel or the MAC message shared in the subordinate station to control station;
Step S303: the system configuration information that the control station increase changes or the transmission frequency of parameter, perhaps reduce the dispatching cycle of corresponding system configuration information or parameter, perhaps stand and send message clean culture or broadcasting that comprises recent systems configuration information or parameter, perhaps carry out other associative operation to the subordinate.
In the specific implementation process, the subordinate station can determine when system configuration information or parameter change, perhaps current whether changing by clear and definite Indication message or control signaling from control station.
Particularly, when system configuration information or parameter change, if the subordinate station does not have correct described system configuration information or the parameter of solving, such as the Cyclic Redundancy Check mistake, the subordinate station will be fed back the indication information of described system configuration information or parameter update failure to control station.
Particularly, the indication information of described system configuration information or parameter update failure is fed back at the subordinate station to control station by the ascending physical signal control channel of sharing, comprise that all subordinaties station can use fixing same physics running time-frequency resource to send described indication information, and described indication information can carry one or more indicator sequences.
Particularly, the indication information of described system configuration information or parameter update failure is fed back at the subordinate station to control station by MAC message, comprise that all subordinaties station can use the MAC message of a clean culture on data or the Traffic Channel to send described indication information, the information field example that described MAC message comprises, as shown in table 1.
For the 802.16m system, can comprise concrete S-SFH bag during information field " upgrades the system configuration information or the parameter information of failure " and upgrade failure information, indicate such as the bitmap that uses 3 bit sizes which or which height bag upgrades failure in 3 son bags, even the 1st bit is corresponding to child bag 1, the 2nd bit corresponding to 2, the 3 bits of child bag corresponding to child bag 3.
Table 1 is used for the MAC information territory example of system configuration information or parameter update failure indication
| The information field type | Explanation/note |
| Type of message | (summary) |
| Upgrade the system configuration information or the parameter information of failure | (summary) |
| Keep | Expansion after being used for |
Particularly, when control station correctly receives described feedback indication information from subordinate station, control station can increase in particular time interval and is carried on the system configuration information that broadcasting changes in the physical control channel or the transmission frequency of parameter, perhaps reduce the dispatching cycle of described system configuration information or parameter, recover the transmission frequency or the dispatching cycle of initial system configuration information or parameter subsequently; Perhaps stand to the subordinate and send message clean culture or broadcasting that comprises recent systems configuration information or parameter by data or Traffic Channel.
Embodiment four
In this embodiment, control station is adjusted the dispatching cycle or the transmission frequency of described system configuration information or parameter based on the CQI feedback from the subordinate station, and/or code rate.Fig. 4 is the flow chart according to the update mode of the third system configuration information of the embodiment of the invention or parameter, as shown in Figure 4; Mainly may further comprise the steps according to the system configuration information of the embodiment of the invention or the update method of parameter:
Step S401: based on feedback request from control station, the subordinate station feedback by long-term or short-term to the control station report sometime the channel quality at interval indicate (CQI) information;
Step S402: in control station is collected sometime at interval,, and these information are merged input as a certain algoritic module from the CQI feedback information at a plurality of different subordinaties station;
Step S403: the system configuration information of described algoritic module output the best this moment or the long-term dispatching cycle or the transmission frequency of parameter, and/or code rate;
Step S404: control station is according to the dispatching cycle or the transmission frequency of the output of described algoritic module, and/or code rate is to subordinate's transmitting system information of standing.
In the specific implementation process, control station can be used to the CQI feedback information at subordinate station part or all of in the automatic network and operate; Particularly, when the control station indication or under default condition, all subordinate stations all need when control station feedback CQI information, and control station is used to carry out from the feedback information at whole subordinaties station the renewal operation of system configuration information or parameter; When control station indicating section subordinate station need be when control station feeds back CQI information, control station is used to carry out from the feedback information at described part subordinate station the renewal operation of system configuration information or parameter.
Particularly, all the subordinate stations that can carry out the CQI feedback operation can have the feedback cycle of identical or different long-term or short-terms (being the feedback time interval), such as 4 common or 8 radio frames, and described feedback cycle can be a default value, is perhaps clearly indicated by descending control signaling or message by control station.
Particularly, because different subordinaties may adopt different CQI feedback cycles in the station, in the same like this period time interval, the feedback number of times that control station receives from different subordinaties station also is inequality, therefore, at first need to consider feedback, and then consider the long-run average at all subordinaties stations from single subordinate station.
As shown in Figure 5, described algoritic module is determined dispatching cycle or transmission frequency, and/or the mode of code rate specifically may further comprise the steps:
Step S501, control station are in particular time interval, and active collection is obtained feedback number of times (n) and corresponding C QI feedback index (Idx) during described subordinate stands in this from the feedback information at specific subordinate station.
Particularly, the CQI index (Idx that feeds back each time
n) can carry concrete modulation coding mode information, this information is notified the Modulation and Coding Scheme of the best that should use in the control station downlink transfer betwixt for the subordinate stands.
Step S502, control station utilize n the CQI feedback index at the described subordinate station that obtains among the step S501, calculate the average CQI that described subordinate stands in the described time interval according to following formula and feed back index (Idx
Avr):
Idx
avr＝(Idx
1+Idx
2+......+Idx
n)/n
Step S503, the subordinate who enables up CQI feedback for the next one stands, and control station repeats above-mentioned steps S501 and step S502, finally obtains each subordinate who enables up CQI feedback and stands in interior average CQI feedback index (Idx of the described time interval
Avr1, Idx
Avr2..., Idx
Avrm); Wherein, m represents the current number that enables the subordinate station of up CQI feedback.
Step S504, control station utilize each that obtain among the step S503 to enable the average CQI feedback index (Idx at the subordinate station of up CQI feedback
Avr), the average CQI that stands in the described time interval according to above-mentioned all subordinaties of following formula calculating feeds back index (IDX
Avr):
IDXavr＝(Idx
avr1+Idx
avr2+......+Idx
avrm)/m
Preferably, according to the difference of specific implementation, can be to above-mentioned average CQI feedback index (IDX in certain span (such as 1 to 16)
Avr) round up the operation that rounds or round up downwards.
Step S505, control station utilize the process of obtaining among the step S504 to round the average CQI feedback index (IDX of operation
Avr), carry out table lookup operation according to specific mapping form, the system configuration information that final output is best or the long-term dispatching cycle or the transmission frequency of parameter, and/or code rate.
Particularly, for different radio frequency interface technology, described average CQI feedback index (IDX
Avr) with the dispatching cycle or the transmission frequency of corresponding system configuration information or parameter, and/or the mapping between code rate may be inequality; With 802.16m radio frequency interface technology is example, and described mapping form can be as shown in table 2.Wherein, it is the abbreviation of To Be Determined by determining later on that TBD represents.
The average CQI feedback of table 2-802.16m index (IDX
Avr) and the dispatching cycle of corresponding system configuration information or parameter (S-SFH) and the mapping relations table between code rate
| IDX avr | S-SFH SP1 dispatching cycle | S-SFH SP2 dispatching cycle | S-SFH SP3 dispatching cycle | The S-SFH code rate |
| 1 | TBD | TBD | TBD | 1/24 |
| 2 | TBD | TBD | TBD | 1/24 |
| 3 | TBD | TBD | TBD | 1/24 |
| 4 | TBD | TBD | TBD | 1/24 |
| 5 | TBD | TBD | TBD | 1/16 |
| 6 | TBD | TBD | TBD | 1/16 |
| 7 | TBD | TBD | TBD | 1/16 |
| 8 | TBD | TBD | TBD | 1/16 |
| 9 | TBD | TBD | TBD | 1/12 |
| 10 | TBD | TBD | TBD | 1/12 |
| 11 | TBD | TBD | TBD | 1/12 |
| 12 | TBD | TBD | TBD | 1/12 |
| 13 | TBD | TBD | TBD | 1/8 |
| 14 | TBD | TBD | TBD | 1/8 |
| 15 | TBD | TBD | TBD | 1/8 |
| 16 | TBD | TBD | TBD | 1/8 |
Particularly, control station is adjusted the dispatching cycle or the transmission frequency of described system configuration information or parameter, and/or code rate, according to above-mentioned steps S501 to step S505, comprise the dispatching cycle or the transmission frequency that increase or reduce described system configuration information or parameter, and/or code rate.
Particularly, described code rate is meant the product of original coding speed and number of repetition; The code rate that increases or reduce described system configuration information or parameter comprises original coding speed and/or the number of repetition that increases or reduce described system configuration information or parameter.
By above-mentioned at least one scheme of the present invention, control station is by carrying out the reproducting periods of system configuration information or parameter at wireless network, perhaps during the listen window at one or more subordinaties station or adjust the dispatching cycle or the transmission frequency of described system configuration information or parameter beyond the listen window, and/or code rate, the subordinate is stood to obtain or fast as far as possible obtain and use up-to-date described system configuration information or parameter, thereby solved in the prior art owing to the subordinate station can't in time receive and use system configuration information after the change or parameter cause the subordinate stand can't operate as normal problem, guaranteed to be in wake up or park mode under the subordinate stand in operate as normal under the situation of system configuration information or parameter change, improved systematic function.
The above is embodiments of the invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (14)
1. a update method that is used for the communication system system information is characterized in that, comprises the steps:
Control station adopts initiatively or the mode of passive adjustment, and the transmission parameter or the send mode of system informations after changing or all are adjusted;
Control station is according to adjusted transmission parameter or send mode is after one or more subordinaties stand the transmission change or all system informations.
2. update method as claimed in claim 1 is characterized in that,
Described control station is after definite system information changes, and adopts the mode of initiatively adjusting, and the transmission parameter of the system information after changing is adjusted.
3. update method as claimed in claim 2 is characterized in that,
Whether described control station is by judging, when described system information changes, exist one or more subordinaties station to be in the sleep window under the sleep pattern, determines the described duration of initiatively adjusting mode of employing;
The mode of initiatively adjusting that described control station adopts comprises: control station is adjusted dispatching cycle or the transmission frequency and/or the code rate of described system information during the listen window at described one or more subordinaties station or beyond the listen window.
4. update method as claimed in claim 1 is characterized in that,
When described control station adopted the mode of passive adjustment, control station was according to the feedback information from the subordinate station, and the transmission parameter or the send mode of system informations after changing or all are adjusted;
Wherein, described feedback information comprises: channel quality indication (CQI) information and/or system information are upgraded the indication information of failure.
5. update method as claimed in claim 4 is characterized in that, described update method further comprises:
Described feedback information is the indication information that system information is upgraded failure;
The subordinate stands under the condition that can not be correctly decoded the system configuration information that changes or parameter, and perhaps the subordinate station is waken the back up from sleep window and found that system information changes, and then feeds back the indication information that described system information is upgraded failure to control station;
Described control station is adjusted dispatching cycle or the transmission frequency and/or the code rate of described system information according to the stand indication information of renewal failure of feedback of the correct subordinate who receives; Perhaps, stand to the subordinate and send the clean culture or the broadcast of the system information after comprising change.
6. update method as claimed in claim 5 is characterized in that,
The ascending physical signal control channel of described subordinate station by sharing, and/or medium access control message is upgraded the failure indication information to the control station feedback;
Described renewal failure indication information comprises system configuration information or parameter and/or the subordinate information of standing.
7. update method as claimed in claim 4 is characterized in that, described update method further comprises:
Described feedback information is a channel quality indication (CQI) information;
Subordinate station is according to the feedback request of control station, the feedback message by long-term or short-term to the control station report sometime the channel quality at interval indicate (CQI) information;
Control station is collected the described interior at interval sometime CQI feedback information from a plurality of different subordinaties station, and calculates according to these CQI feedback informations, and dispatching cycle or the transmission frequency and/or the code rate of table look-up output system configuration information this moment or parameter;
Control station is according to the dispatching cycle or the transmission frequency of output, and/or code rate is stood to the subordinate and sent follow-up system configuration information or parameter.
8. update method as claimed in claim 7 is characterized in that,
Described control station is determined dispatching cycle or transmission frequency according to channel quality indication (CQI) feedback information at subordinate station according to following steps, and/or code rate:
Control station obtains described subordinate and stands in interior feedback number of times (n) of particular time interval and corresponding C QI feedback index (Idx), obtains described subordinate and stands in interior average CQI feedback index (Idx of the described time interval
Avr);
Obtain stand average CQI feedback index (Idx in each comfortable particular time interval of m subordinate
Avr1, Idx
Avr2..., Idx
Avrm), and obtain all subordinaties and stand in average CQI feedback index (IDX in the described time interval
Avr);
The control station utilization is through rounding the average CQI feedback index (IDX of operation
Avr), carry out table lookup operation according to specific mapping form, the long-term dispatching cycle or the transmission frequency of output system information, and/or code rate.
9. as each described update method in the claim 1,2 or 4, it is characterized in that,
Described transmission parameter comprises: dispatching cycle or transmission frequency and/or code rate.
10. as each described update method in the claim 1,2 or 4, it is characterized in that,
Described system information comprises being used for system configuration information or the parameter that network is reentried, network initially enters and network is found.
11. as each described update method in the claim 1,2 or 4, it is characterized in that,
Described control station comprises following one or more network elements: grand control station, microcontroller station, slight control station, relay station;
Described subordinate station comprises following one or more network elements: terminal, relay station, microcontroller station, control station slightly.
12. a communication system is characterized in that, comprising:
Control station adopts initiatively or the mode of passive adjustment, and the transmission parameter or the send mode of system informations after changing or all are adjusted; Stand to one or more subordinaties according to adjusted transmission parameter or send mode and to send after changing or all system informations;
The subordinate station is used for receiving and understanding system information.
13. communication system as claimed in claim 12 is characterized in that,
Described subordinate station, also be used under the condition that can not be correctly decoded the system configuration information that changes or parameter, perhaps the subordinate station is waken the back up from sleep window and is found that system configuration information or parameter change, and then feeds back the indication information of described system configuration information or parameter update failure to control station;
Correspondingly, described control station adopts the mode of passive adjustment, according to the stand indication information of renewal failure of feedback of the subordinate of correct reception, adjusts dispatching cycle or the transmission frequency and/or the code rate of described system information; Perhaps, stand to the subordinate and send the clean culture or the broadcast of the system information after comprising change.
14. communication system as claimed in claim 12 is characterized in that,
Described subordinate station also is used for the feedback request according to control station, the feedback message by long-term or short-term to the control station report sometime the channel quality at interval indicate (CQI) information;
Correspondingly, described control station also is used to adopt the mode of passive adjustment, collect described sometime at interval in from the CQI feedback information at a plurality of different subordinaties station, and calculate and dispatching cycle or the transmission frequency and/or the code rate of table look-up output system configuration information this moment or parameter according to these CQI feedback informations; Control station is according to the dispatching cycle or the transmission frequency of output, and/or code rate is stood to the subordinate and sent follow-up system configuration information or parameter.
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| PCT/CN2010/078676 WO2011076042A1 (en) | 2009-12-25 | 2010-11-12 | Communication system and method for updating system information in communication system |
| JP2012525880A JP5452721B2 (en) | 2009-12-25 | 2010-11-12 | Communication system and method for updating system information in communication system |
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Also Published As
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| WO2011076042A1 (en) | 2011-06-30 |
| CN102111855B (en) | 2014-03-12 |
| JP5452721B2 (en) | 2014-03-26 |
| JP2013502863A (en) | 2013-01-24 |
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