CN103096255A - Broadcast news sending method and base station - Google Patents
Broadcast news sending method and base station Download PDFInfo
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- CN103096255A CN103096255A CN2013100121868A CN201310012186A CN103096255A CN 103096255 A CN103096255 A CN 103096255A CN 2013100121868 A CN2013100121868 A CN 2013100121868A CN 201310012186 A CN201310012186 A CN 201310012186A CN 103096255 A CN103096255 A CN 103096255A
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Abstract
The invention discloses a broadcast news sending method and a base station and relates to the communication technical field. The broadcast news sending method and the base station are used for helping users improve a network cut success ratio and lower the influence of a peak value speed ratio of the base station simultaneously, and are applied to a long term evolution (LTE) system. The broadcast news sending method comprises the following steps: when a connect-in request which is sent by the network cut users is received, adjusting the level of a modulation and coding strategy (MCS) from a planning MCS level to the connect-in MCS level, and sending the broadcast news based on the connect-in MCS level; and additionally, when corresponding information which indicates the network cut users complete connect-in procedure is received, restoring the MCS level to the planning MCS level, and broadcasting news based on the planning MCS level.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of broadcast message sending method and a kind of base station.
Background technology
In Long Term Evolution (Long Term Evolution, LTE) system, the user needs to read the broadcast message of Target cell in handoff procedure at present, read the broadcast message success after handoff procedure could complete smoothly.
adopt according to modulation and coding strategy (Modulation and Coding Scheme and broadcasting now is general, MCS) grade is dispatched, can guarantee that the covering in 90% zone in the residential quarter meets the demands although use existing this fixing broadcast scheduling MCS grade of mode, but still there is certain reception signal risk at certain area, under the real network environment, near the wireless signal more complicated band is switched in the minizone, the lower reason of signal strength signal intensity is blocked owing to itself received by neighboring area signal larger interference or signal in some zone, the user can not correctly read whole broadcast messages within the time of switching requirement after being synchronized to Target cell, cause handoff failure.
in order to improve in order to reduce the MCS grade of the reduction broadcast scheduling that probability of failure can not be simply, although the MCS grade of broadcast scheduling is lower, the demodulation threshold that requires is just lower, the probability of the correct receiving broadcasting information of terminal is also just higher, reduced the handoff failure probability that broadcast reception unsuccessfully causes, but Physical Resource Block (the Physical Resource Block that while lower grade of MCS scheduling broadcast message takies, PRB) resource will be more, the peak rate that system may reach will be affected, especially for the long residential quarter of broadcast message, the stock number that broadcast message takies must careful consideration.
Summary of the invention
The embodiment of the present invention provides a kind of broadcast message sending method and a kind of base station, the impact that is subject in order to the peak rate that reduces the base station when helping the user to improve to cut the net success rate.
A kind of broadcast message sending method that the embodiment of the present invention provides, the method comprises:
Receive when cutting the access request message that network users sends, the grade of modulation and coding strategy MCS is adjusted downward to access MCS grade by planning MCS grade, with described access MCS grade transmission broadcast; And
Receive when expression is described cuts the response message that network users access completes, the grade of MCS is returned to planning MCS grade, with described planning MCS grade transmission broadcast.
A kind of base station that the embodiment of the present invention provides, this base station comprises:
The level adjustment module is used for receiving when cutting the access request message that network users sends, and the grade of modulation and coding strategy MCS is adjusted downward to access MCS grade by planning MCS grade; And after receiving that expression is described and cutting the response message that network users access completes, the grade of MCS is returned to planning MCS grade;
Broadcast module is used for sending broadcast according to the grade of current MCS.
The embodiment of the present invention, by the level adjustment module that arranges, thereby realized that cell base station is when existing the user to cut net operation, can automatically indicate control module to reduce the grade of MCS, and then improved the user and cut the successful probability of net, after user's complete operation, can will recover the grade of MCS automatically again simultaneously, can not affect the peak rate of base station.
Description of drawings
The method flow schematic diagram of a kind of broadcast message sending method that Fig. 1 provides for the embodiment of the present invention;
The state transition condition schematic diagram of the state handover mechanism that Fig. 2 provides for the embodiment of the present invention;
The apparatus structure schematic diagram of a kind of base station that Fig. 3 provides for the embodiment of the present invention;
A kind of broadcast message sending method that Fig. 4 provides for the embodiment of the present invention and a kind of cooperating schematic flow sheet of base station.
Embodiment
The embodiment of the present invention provides a kind of broadcast message sending method and a kind of base station, is applied to the impact that long evolving system is subject in order to the peak rate that reduces the base station when helping user's raising to cut the net success rate.
At first, the embodiment of the present invention provides a kind of broadcast message sending method, is applied to long evolving system, and the method comprises:
S101 receives when cutting the access request message that network users sends, and the grade of modulation and coding strategy MCS is adjusted downward to access MCS grade by planning MCS grade, with described access MCS grade transmission broadcast; And
S102 receives when expression is described cuts the response message that network users access completes, and the grade of MCS is returned to planning MCS grade, with described planning MCS grade transmission broadcast.
in embodiments of the present invention, the user is during from a residential quarter to another residential quarter, need to cut net operation, the base station of former residential quarter is sent to access request message the base station that another accesses the residential quarter, the base station of this access residential quarter is when receiving described access request message, showing has the user need to cut net, temporarily reduce the grade of MCS, send broadcast with lower speed, so that the user can complete more easily and cut net operation, the user complete cut net operation after, again with the level restoration that waits of MCS, so namely reduce cutting of user and netted failed probability, can not affect again the peak rate of base station.
Specific to long evolving system, on the basis of above-described embodiment, described grade with MCS is adjusted downward to access MCS grade by planning MCS grade, specifically comprises:
Send to reduce MCS grade Indication message by the radio resource control RRC layer to media access control MAC layer, described MAC layer is according to described reductions MCS grade Indication message, the grade of MCS is adjusted downward to by planning MCS grade accesses the MCS grade;
Described grade with MCS returns to planning MCS grade, specifically comprises:
Send to recover MCS grade Indication message by rrc layer to the MAC layer, described MAC layer is according to described recoverys MCS grade Indication message, the grade of MCS returned to plan the MCS grade.
the base station of access residential quarter is when receiving described access request message, showing has the user need to cut net, Radio Resource is controlled (Radio Resource Control, RRC) layer sends and reduces MCS grade Indication message to media access control (Medium Access Control, MAC) layer, notify the grade of its temporary transient MCS of reduction, send broadcast with lower speed, so that the user can complete more easily and cut net operation, the user complete cut net operation after, reinform the MAC layer with the level restoration that waits of MCS, so namely reduce cutting of user and netted failed probability, can not affect again the peak rate of base station.
Be understandable that, the embodiment of the present invention is provided with threshold time, described threshold time is a stand-by period of base station sets, because the MCS grade should not be in too low state for a long time, so as in default threshold time, do not receive described response message, automatically send and recover MCS grade Indication message, recover the grade of MCS, allow the base station recover normal operation.
The length of described threshold time setting can arrange according to actual conditions.
Usually, the grade of described MCS is divided into 29 grades from low to high, from grade 0-grade 28.
Need to prove, the configuration of the radio frequency speed of base station realizes by the index value of MCS grade.Physical transmission rate under one group of parameter that the corresponding index value of each MCS grade is corresponding in fact.
The MCS grade of planning described in the embodiment of the present invention calculates according to link budget, and described link budget is to the accounting of all gains and decay in delivery section, communication link, communication environments (atmosphere, coaxial cable, waveguide, optical fiber etc.) and receiving terminal in a communication system.In real work, the calculating of described planning grade need to be considered the actual conditions amount body setting of each residential quarter, has considered network environment, propagation model, channel demodulation thresholding and the coverage distance etc. of residential quarter.Described access MCS grade is the grade that will plan after the MCS grade reduces, is used for improving user's the probability of cutting the net operation success, and the grade that described planning MCS grade and described access MCS grade specifically differ can arrange according to actual conditions.
Further, should guarantee that described access MCS grade is not more than described planning MCS grade, and be not less than grade 0.Access MCS grade after namely needing to guarantee to lower is not more than planning MCS grade and less than the lowest class 0 of MCS.
So far, in the above-mentioned several embodiment of the present invention, rrc layer in the base station coordinates reality to adopt a kind of state handover mechanism with the MAC layer, this state handover mechanism comprises initial condition, downward state and normal condition, the base station is in the switching of carrying out under the prerequisite that satisfies condition between each state, as shown in Figure 2, below the detailed implication of introducing above-mentioned each state and between the condition switched:
1, initial condition: the network that represents this residential quarter is in the process of foundation;
2, normal condition: represent that this residential quarter sends broadcast message with the grade of the MCS of planning, does not receive access request message;
3, downward state: represent that this residential quarter has received access request message, send broadcast message with the grade of the MCS that lowers.
As shown in Figure 3, the switching condition between three states is as follows;
Condition 1: subzone network is set up and is completed;
Condition 2: subzone network deletion;
Condition 3: have the user to prepare to cut net operation;
Condition 4: the user cuts net operation and completes or cut the net operation duration over the unit interval.
Adopt above-mentioned state handover mechanism to coordinate the inventive method to complete when the user having been detected and cut net operation in the embodiment of the present invention, reduce the grade of MCS, improve and cut the net success rate, when not having the user to cut net operation, adopt the MCS grade of planning, normally send broadcast message.
In order to coordinate said method, the embodiment of the present invention also provides a kind of base station, and as shown in Figure 3, this base station comprises:
In embodiments of the present invention, described base station is when receiving access request message, the level adjustment module is reduced to access MCS grade with the grade of MCS, at this moment broadcast module adopts access MCS grade to send broadcast message, user's the net operation of cutting is more easily completed, after the user cuts net operation and completes, the level adjustment module returns to planning MCS grade with the grade of MCS, allow broadcast module send broadcast according to normal planning MCS grade, so namely reduce cutting of user and netted failed probability, can not affect again normal operation and the peak rate of base station.
Further, described level adjustment module can specifically comprise: indicating module and control module; Wherein
Described indicating module is used for sending to described control module and reducing MCS grade Indication message receiving when cutting the access request message that network users sends; When receiving that expression is described cuts the response message that network users access completes, send to described control module and recover MCS grade Indication message;
Described control module is used for when receiving described reductions MCS grade Indication message, the grade of MCS is adjusted downward to by regular MCS grade accesses the MCS grade; When receiving described recovery MCS grade Indication message, the grade of MCS is returned to planning MCS grade.
In the above embodiment of the present invention, sent the indication that recovers and reduce by indicating module, carried out by control module, carry out the concrete adjustment of MCS grade.
Usually, described indicating module is arranged at rrc layer, and described control module is arranged at the MAC layer.
Be understandable that, this device also should comprise time block, described time block is included as a threshold time of base station sets, because the MCS grade should not be in too low state for a long time, so in default threshold time, do not receive described response message, automatically notify described indicating module to send and recover MCS grade Indication message.
Need to prove, adjusting the stage arrangement such as broadcast scheduling in a kind of long evolving system of the present invention can be integrated on the base station.
Technical scheme for a better understanding of the present invention, as shown in Figure 4, the below introduces in detail a inventive method and device coordinates the embodiment that realizes:
S201, user A enters the second cell range from the first cell range, and the base station of the first residential quarter sends access request message to the base station of the second residential quarter;
S202, the base station of the second residential quarter receives access request message, carries out the state conversion, enters the reduction state by normal condition, indicating module sends from rrc layer to the control module that is positioned at the MAC layer and reduces MCS grade Indication message, and the startup time block carries out the timing of threshold time;
S203, described control module is adjusted downward to access MCS grade by planning MCS grade according to preset rules with MCS after receiving described reduction MCS grade Indication message, and broadcast module sends broadcast according to described access MCS grade;
S204, described base station is when receiving that expression is described cuts response message that network users access completes or time block and finish the timing of threshold time, and indicating module sends and recovers MCS grade Indication message to control module;
S205, described control module is after receiving described recovery MCS grade Indication message, the grade of described MCS is returned to planning MCS grade by access MCS grade, and with the state handover mechanism by lowering recovering state to normal condition, broadcast module is according to planning MCS grade transmission broadcast.
Said method of the present invention and device are applicable to long evolving system and network.
In sum, the embodiment of the present invention, by stage arrangements such as adjustment broadcast schedulings in the long evolving system that arranges, thereby realized that cell base station is when existing the user to cut net operation, can automatically reduce the grade of MCS, improve the user and cut the successful probability of net, simultaneously after user's complete operation, can will recover the grade of MCS automatically again, can not affect the peak rate of base station.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, implement software example or in conjunction with the form of the embodiment of software and hardware aspect fully.And the present invention can adopt the form that wherein includes the upper computer program of implementing of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) of computer usable program code one or more.
The present invention is that reference is described according to flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the present invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of realizing in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is realized the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby be provided for realizing the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame in the instruction of carrying out on computer or other programmable devices.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of claim of the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (11)
1. a broadcast message sending method, be applied to long evolving system, it is characterized in that, the method comprises:
Receive when cutting the access request message that network users sends, the grade of modulation and coding strategy MCS is adjusted downward to access MCS grade by planning MCS grade, with described access MCS grade transmission broadcast; And
Receive when expression is described cuts the response message that network users access completes, the grade of MCS is returned to planning MCS grade, with described planning MCS grade transmission broadcast.
2. the method for claim 1, is characterized in that, described grade with MCS is adjusted downward to access MCS grade by planning MCS grade, specifically comprises:
Send to reduce MCS grade Indication message by the radio resource control RRC layer to media access control MAC layer, described MAC layer is according to described reductions MCS grade Indication message, the grade of MCS is adjusted downward to by planning MCS grade accesses the MCS grade;
Described grade with MCS returns to planning MCS grade, specifically comprises:
Send to recover MCS grade Indication message by rrc layer to the MAC layer, described MAC layer is according to described recoverys MCS grade Indication message, the grade of MCS returned to plan the MCS grade.
3. method as claimed in claim 2, is characterized in that, in default threshold time, do not receive described response message, automatically sends to recover MCS grade Indication message.
4. the method for claim 1, is characterized in that, the grade of described MCS is divided into 29 grades from low to high, from grade 0-grade 28.
5. method as claimed in claim 4, is characterized in that, described planning MCS grade calculates according to link budget.
6. a base station, is characterized in that, comprising:
The level adjustment module is used for receiving when cutting the access request message that network users sends, and the grade of modulation and coding strategy MCS is adjusted downward to access MCS grade by planning MCS grade; And after receiving that expression is described and cutting the response message that network users access completes, the grade of MCS is returned to planning MCS grade;
Broadcast module is used for sending broadcast according to the grade of current MCS.
7. base station as claimed in claim 6, is characterized in that, described level adjustment module specifically comprises: indicating module and control module; Wherein
Described indicating module is used for sending to described control module and reducing MCS grade Indication message receiving when cutting the access request message that network users sends; When receiving that expression is described cuts the response message that network users access completes, send to described control module and recover MCS grade Indication message;
Described control module is used for when receiving described reductions MCS grade Indication message, the grade of MCS is adjusted downward to by regular MCS grade accesses the MCS grade; When receiving described recovery MCS grade Indication message, the grade of MCS is returned to planning MCS grade.
8. base station as claimed in claim 7, is characterized in that, this device also comprises time block, is used for not receiving described response message in default threshold time, automatically notifies described indicating module to send and recover MCS grade Indication message.
9. base station as claimed in claim 8, is characterized in that, described indicating module is arranged at rrc layer, and described control module is arranged at the MAC layer.
10. base station as claimed in claim 6, is characterized in that, the grade of described MCS is divided into 29 grades from low to high, from grade 0-grade 28.
11. base station as claimed in claim 10 is characterized in that, described planning MCS grade calculates according to link budget.
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