CN101039143A - Method for adjusting downlink modulation coding mode - Google Patents
Method for adjusting downlink modulation coding mode Download PDFInfo
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- CN101039143A CN101039143A CN 200610065081 CN200610065081A CN101039143A CN 101039143 A CN101039143 A CN 101039143A CN 200610065081 CN200610065081 CN 200610065081 CN 200610065081 A CN200610065081 A CN 200610065081A CN 101039143 A CN101039143 A CN 101039143A
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Abstract
The present invention is provided with a method to adjust the downlink modulating coding mode. In the method, mobile station MS carries at least a request message of the burst block Burst, which requests to adjust modulating coding mode, to send to the basic station BS. The adjustment modulating coding mode request of the Burst comprises the present downlink interval using code DIUC which requests to adjust the modulating coding mode of the Burst and the target DIUC which requests the BS to assign for the Burst. At least one response message to the Burst response request is carried to the MS when the request message is received by the BS. The Burst response requirement comprises the present DIUC which requests to adjust the downlink modulating coding mode of the Burst and the DIUC assigned to the Burst by the BS. By the method of the invention, the modulating coding mode can be adjusted real-timely and the service quality requirement of the downlink data transmission can be ensured.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of method of adjusting downlink modulation coding mode.
Background technology
As everyone knows, mobile communication system generally comprise the base station (Base Station, BS) and travelling carriage (Mobile Station, MS), each BS can communicate with a plurality of MS in the scope that self covers.When BS and MS communicate, BS and MS basis channel quality status and service quality (Quality of Service at that time, QOS) demand is determined the modulation coding mode that current uplink and downlink signal post needs, wherein, uplink interval uses sign indicating number, and (Uplink Interval Usage Code UIUC) indicates the modulation coding mode that uplink burst piece (Burst) adopts; Downlink interval is used sign indicating number, and (Downlink IntervalUsage Code DIUC) indicates the modulation coding mode that the downlink burst piece adopts.(Uplink Channel Descriptor, UCD) (Downlink Channel Descriptor DCD) obtains UIUC and the pairing concrete modulation coding mode of DIUC with the down channel description in the up channel description that MS can periodically send by BS.
Yet for mobile communication system, the variation of the uncertainty of channel quality status may cause BS can not satisfy current QOS demand of communicating by letter with the current modulation coding mode of MS agreement.For example, for downlink data transmission, because the deterioration of channel quality status, the downlink data error rate that causes MS to receive raises, thereby can not satisfy the QOS demand of downlink data transmission, at this moment, MS needs notice BS adjustment downlink modulation coding mode in time, promptly asks BS to adopt more suitable modulation coding mode to carry out downlink data transmission.
In the 802.16-2004 agreement, MS gives BS by distance measurement request (RNG_REQ) message that downlink burst block feature request (Requested Downlink Burst Profile) parameter is carried in transmission, and request BS adjusts downlink modulation coding mode.The form of Requested Downlink Burst Profile parameter is referring to table 1, adopts the TLV coding, by type (Type, T), length (Length, L) and value (Value, V) three parts composition.
| Title | Type | Length (byte) | Value |
| Requested Downlink Burst Profile | 1 | 1 | 0-3 bit: MS request BS is the target DIUC that descending Burst distributes; The 4-7 bit: down channel is described minimum four bits of configuration change Counter Value. |
Table 1
After BS receives RNG_REQ message, send ranging response (RNG_RSP) the message conduct of carrying OFDM access downlink business burst block feature (Downlink Operational Burst Profole for OFDMA) parameter to MS and reply, and descending Burst is carried out modulating-coding according to the DIUC that redistributes.The form of Downlink Operational Burst Profile for OFDMA parameter is referring to table 2, adopts the TLV coding, by type (Type, T), length (Length, L) and value (Value, V) three parts composition.
| Title | Type | Length (byte) | Value |
| Downlink Operational Burst Profile for OFDMA | 33 | 2 | This parameter is used for responding the Requested Downlink Burst Profile parameter in the RNG_REQ message.1: the 0-3 bit: BS of byte is the available robust D IUC that descending Burst distributes; 4-7 bit: repeated encoding indication, wherein, 0b0000 represents not have repeated encoding, 0b0001 represents repeated encoding 2 times, 0b0010 represents repeated encoding 4 times, 0b0011 represents repeated encoding 6 times, if order of modulation is higher than QPSK, the repeated encoding indication is made as 0b0000.Byte 2: the down channel descriptor configuration changes the value of counter. |
Table 2
From table 1, table 2 as seen, Requested Downlink Burst Profile parameter can only ask to adjust the modulation coding mode of a Burst, promptly adjust the DIUC of a Burst, correspondingly, also only considered the adjustment of the DIUC of a Burst during DownlinkOperational Burst Profile for OFDMA parameter designing.
But a MS can have a plurality of Burst parallel in a downlink frame, and the type of service that each parallel Burst is corresponding different adopts different modulation coding modes, and promptly each parallel Burst has different DIUC.Therefore, when a plurality of Burst are parallel, if exist a more than Burst need adjust downlink modulation coding mode simultaneously, so, existing MS request BS adjusts the method for downlink modulation coding mode, can not adjust the downlink modulation coding mode of a plurality of Burst simultaneously.And, because only having indicated request BS in the RequestedDownlink Burst Profile parameter is the target DIUC that descending Burst distributes, and do not indicate this target DIUC by current which Burst request, in like manner, it is the DIUC that descending Burst distributes that DownlinkOperational Burst Profile for OFDMA parameter has also only indicated BS, which do not distribute for Burst and indicate this DIUC, therefore, when a plurality of Burst are parallel, the method of existing adjustment downlink modulation coding mode can not be adjusted the downlink modulation coding mode of some Burst.
That is to say that when MS had a plurality of Burst to walk abreast in a downlink frame, MS can't be in real time according to channel quality status, request BS adjusts the downlink modulation coding mode of parallel Burst, can not satisfy the QOS demand of downlink data transmission.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of method of adjusting downlink modulation coding mode, make MS ask BS to adjust downlink modulation coding mode, satisfy the QOS demand of downlink data transmission in real time according to channel quality status.
For achieving the above object, the method for adjustment downlink modulation coding mode provided by the invention mainly comprises following step:
The request message that A, mobile station MS will carry the adjustment downlink modulation coding mode request of at least one burst block Burst sends to base station BS, comprises in the adjustment downlink modulation coding mode request of described Burst: request is adjusted the current downlink interval of downlink modulation coding mode Burst and is used sign indicating number DIUC, reaches the target DIUC that request BS distributes for this Burst;
After B, BS receive request message, the response message that carries at least one Burst request-reply is sent to MS, comprises in the described Burst request-reply: request adjust downlink modulation coding mode Burst current DIUC, and BS be the DIUC of this Burst distribution.
Wherein, in the steps A, MS sends one or one or more described request message to BS, and the adjustment downlink modulation coding mode request of carrying a Burst in every request message; Perhaps,
In the steps A, MS sends a described request message to BS, and the adjustment downlink modulation coding mode request of carrying an above Burst in the request message that is sent.
Among the step B, BS sends one or one or more described response message to MS, and carries a Burst request-reply in every response message; Perhaps,
Among the step B, BS sends a described response message to MS, and carries an above Burst request-reply in the response message that is sent.
Wherein, steps A described request message is distance measurement request RNG_REQ message, and the adjustment downlink modulation coding mode request of described Burst is carried in the downlink burst block feature request Requested Downlink Burst Profile parameter of RNG_REQ message;
The described response message of step B is a ranging response RNG_RSP message, and the OFDM that described Burst request-reply is carried at RNG_RSP message inserts in the downlink business burst block feature DownlinkOperational Burst Profile for OFDMA parameter.
Further comprise the corresponding repeated encoding indication of DIUC of distribution in the described Burst request-reply.
This shows, the present invention adjusts current DIUC and the target DIUC of downlink modulation coding mode Burst by indicate request in Requested Downlink Burst Profile parameter, and the current DIUC of downlink modulation coding mode Burst and the DIUC that BS distributes for this Burst are adjusted in the request that indicates in Downlink Operational Burst Profile for OFDMA parameter, make that MS can be in real time according to channel quality status, request BS adjusts the downlink modulation coding mode of parallel Burst, guarantee the QOS demand of downlink data transmission, improved the performance of mobile communication system.
Description of drawings
Fig. 1 is a method flow diagram of adjusting downlink modulation coding mode in the embodiment of the invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, the embodiment that develops simultaneously with reference to the accompanying drawings is described in further detail the present invention.
Basic thought of the present invention is: the request message that MS will carry the adjustment downlink modulation coding mode request of at least one Burst sends to BS, comprises in the adjustment downlink modulation coding mode request of described Burst: request is adjusted the current downlink interval of downlink modulation coding mode Burst and is used sign indicating number DIUC, reaches the target DIUC that request BS distributes for this Burst; After BS receives request message, the response message that carries at least one Burst request-reply is sent to MS, comprises in the described Burst request-reply: request adjust downlink modulation coding mode Burst current DIUC, and BS be the DIUC of this Burst distribution.
In specific embodiment, described request message can be RNG_REQ message, and corresponding, the request of Burst is carried in the Requested Downlink Burst Profile parameter of RNG_REQ message; Described response message can be a RNG_RSP message, and corresponding, the Burst request-reply is carried in the Downlink Operational Burst Profile for OFDMA parameter of RNG_RSP message.Referring to shown in Figure 1, the specific implementation of the embodiment of the invention comprises following step:
The RNG_REQ message that step 101:MS will carry Requested Downlink Burst Profile parameter sends to BS, and described Requested Downlink Burst Profile parameter comprises the current DIUC of the Burst that asks the adjustment downlink modulation coding mode and the target DIUC that request BS distributes for this Burst;
The adjustment of downlink modulation coding mode when realizing that a plurality of Burst are parallel, when MS request BS adjusts the modulation coding mode of descending Burst among the present invention, not only indicating request BS is the target DIUC that descending Burst distributes, indicate this request simultaneously and send, as the DIUC that indicates the current use of Burst of the request of sending is current DIUC by which Burst.
When a plurality of Burst walked abreast, if there be N Burst to ask BS to adjust downlink modulation coding mode simultaneously, MS can adopt diverse ways, and request BS adjusts the descending modulation system of a plurality of Burst.
Such as, the Requested Downlink Burst Profile parameter format that ginseng is shown in Table 3, MS is by sending the RNG_REQ message of the Requested Downlink Burst Profile parameter carry form shown in the table 3 for N time to BS, request BS adjusts the downlink modulation coding mode of N Burst, and promptly Requested Downlink Burst Profile parameter includes only the request of a Burst.Wherein, 1≤N≤Max_Num_Burst, Max_Num_Burst is the maximum number of parallel Burst.
| Title | Type | Length (byte) | Value |
| Requested Downlink Burst Profile | 1 | 2 | Byte 0-3 bit: MS request in 1: the BS adjusts the current DIUC of the Burst of downlink modulation coding mode; The target DIUC that 4-7 bit: MS request BS distributes for this Burst.2: the 0-3 bits of byte: down channel is described minimum four bits of configuration change Counter Value; 4-7 bit: keep. |
Table 3
Perhaps, the Requested Downlink Burst Profile parameter format that ginseng is shown in Table 4, MS is by sending the RNG_REQ message of the Requested Downlink Burst Profile parameter of once carrying form shown in the table 4 to BS, request BS adjusts the downlink modulation coding mode of N Burst.As shown in table 4, a Requested Downlink Burst Profile parameter comprises the request of N Burst, like this, can effectively save interface-free resources.
| Title | Type | Length (byte) | Value |
| Requested Downlink Burst Profile | 1 | N+1 | Byte 0-3 bit: MS request in 1: the BS adjusts the current DIUC of first Burst of downlink modulation coding mode; The target DIUC that 4-7 bit: MS request BS distributes for this Burst.Byte 0-3 bit: MS request in 2: the BS adjusts the current DIUC of second Burst of downlink modulation coding mode; The target DIUC that 4-7 bit: MS request BS distributes for this Burst.Byte N: 0-3 bit: MS request BS adjusts the current DIUC of N Burst of downlink modulation coding mode; The target DIUC that 4-7 bit: MS request BS distributes for this Burst.Byte N+1: the 0-3 bit: down channel is described minimum four bits of configuration change Counter Value; 4-7 bit: keep. |
Table 4
Need to prove that MS is not limited to above-mentioned several to the method for the descending modulation system request of BS transmission adjustment and the form of Requested Downlink Burst Profile parameter.
After step 102:BS receives RNG_REQ message, return the RNG_RSP message of carrying DownlinkOperational Burst Profile for OFDMA parameter to MS, described DownlinkOperational Burst Profile for OFDMA parameter comprises that current DIUC, the BS of the Burst of request adjustment downlink modulation coding mode are the DIUC of this Burst distribution and the corresponding repeated encoding indication of DIUC of distribution.
BS can adopt diverse ways to reply, and according to the DIUC that redistributes each descending Burst be carried out modulating-coding after receiving the RNG_REQ message of the request downlink modulation coding mode adjustment that MS sends.
Such as, the Downlink Operational Burst Profile for OFDMA parameter format that ginseng is shown in Table 5, BS is by sending the RNG_RSP message of the Downlink OperationalBurst Profile for OFDMA parameter carry form shown in the table 5 for N time to MS, the Burst that downlink modulation coding mode is adjusted in N request makes and replying respectively, and promptly a Downlink Operational Burst Profilefor OFDMA parameter includes only replying a Burst request.
| Title | Type | Length (byte) | Value |
| Downlink Operational Burst Profile for OFDMA | 33 | 3 | This parameter is used for responding the Requested Downlink Burst Profile parameter in the RNG_REQ message.Byte 0-3 bit: MS request in 1: the BS adjusts the current DIUC of the Burst of downlink modulation coding mode; The available robust D IUC that 4-7 bit: BS distributes for this Burst.2: the 0-3 bits of byte: repeated encoding indication, wherein, 0b0000 represents not have repeated encoding, 0b0001 represents repeated encoding 2 times, 0b0010 represents repeated encoding 4 times, 0b0011 represents repeated encoding 6 times, if order of modulation is higher than QPSK, the repeated encoding indication is made as 0b0000; 4-7 bit: keep.Byte 3: the down channel descriptor configuration changes the value of counter. |
Table 5
Perhaps, the Downlink Operational Burst Profile for OFDMA parameter format that ginseng is shown in Table 6, BS is by sending the RNG_RSP message of the Downlink OperationalBurst Profile for OFDMA parameter of once carrying form shown in the table 6 to MS, the Burst that downlink modulation coding mode is adjusted in N request makes and replying simultaneously.As shown in table 6, a Downlink OperationalBurst Profile for OFDMA parameter comprises replying that N Burst asks, and like this, can effectively save interface-free resources.
| Title | Type | Length (byte) | Value |
| Downlink Operational Burst Profile for OFDMA | 33 | 2N+1 | This parameter is used for responding the Requested Downlink Burst Profile parameter in the RNG_REQ message.Byte 0-3 bit: MS request in 1: the BS adjusts the current DIUC of first Burst of downlink modulation coding mode; The available robust D IUC that 4-7 bit: BS distributes for this Burst.2: the 0-3 bits of byte: repeated encoding indication, wherein, 0b0000 represents not have repeated encoding, 0b0001 represents repeated encoding 2 times, 0b0010 represents repeated encoding 4 times, 0b0011 represents repeated encoding 6 times, if order of modulation is higher than QPSK, the repeated encoding indication is made as 0b0000; 4-7 bit: keep.Byte 2N-1: 0-3 bit: MS request BS adjusts the current DIUC of N Burst of downlink modulation coding mode; The available robust D IUC that 4-7 bit: BS distributes for this Burst.Byte 2N: 0-3 bit: repeated encoding indication, wherein, 0b0000 represents not have repeated encoding, 0b0001 represents repeated encoding 2 times, 0b0010 represents repeated encoding 4 times, 0b0011 represents repeated encoding 6 times, if order of modulation is higher than QPSK, the repeated encoding indication is made as 0b0000; 4-7 bit: keep.Byte 2N+1: the down channel descriptor configuration changes the value of counter. |
Table 6
Need to prove that BS makes the method for replying and the form of Downlink OperationalBurst Profile for OFDMA parameter is not limited to above-mentioned several to MS.
As seen, use method provided by the present invention, MS can be in real time according to channel quality status, request BS adjusts the downlink modulation coding mode of parallel Burst, the actual conditions that meet mobile communication system more, guarantee the QOS demand of downlink data transmission, improved the performance of mobile communication system.
The above has carried out further detailed description to purpose of the present invention, technical scheme and beneficial effect; institute is understood that; the above is not in order to restriction the present invention; within the spirit and principles in the present invention all; any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1, a kind of method of adjusting downlink modulation coding mode is characterized in that, this method may further comprise the steps:
The request message that A, mobile station MS will carry the adjustment downlink modulation coding mode request of at least one burst block Burst sends to base station BS, comprises in the adjustment downlink modulation coding mode request of described Burst: request is adjusted the current downlink interval of downlink modulation coding mode Burst and is used sign indicating number DIUC, reaches the target DIUC that request BS distributes for this Burst;
After B, BS receive request message, the response message that carries at least one Burst request-reply is sent to MS, comprises in the described Burst request-reply: request adjust downlink modulation coding mode Burst current DIUC, and BS be the DIUC of this Burst distribution.
2, method according to claim 1 is characterized in that, in the steps A, MS sends one or one or more described request message to BS, and the adjustment downlink modulation coding mode request of carrying a Burst in every request message; Perhaps,
In the steps A, MS sends a described request message to BS, and the adjustment downlink modulation coding mode request of carrying an above Burst in the request message that is sent.
3, method according to claim 1 is characterized in that, among the step B, BS sends one or one or more described response message to MS, and carries a Burst request-reply in every response message; Perhaps,
Among the step B, BS sends a described response message to MS, and carries an above Burst request-reply in the response message that is sent.
4, according to each described method of claim 1 to 3, it is characterized in that, steps A described request message is distance measurement request RNG_REQ message, and the adjustment downlink modulation coding mode request of described Burst is carried in the downlink burst block feature request Requested Downlink BurstProfile parameter of RNG_REQ message;
The described response message of step B is a ranging response RNG_RSP message, and the OFDM that described Burst request-reply is carried at RNG_RSP message inserts in the downlink business burst block feature DownlinkOperational Burst Profile for OFDMA parameter.
5, according to each described method of claim 1 to 3, it is characterized in that, further comprise the corresponding repeated encoding indication of DIUC of distribution in the described Burst request-reply.
6, method according to claim 4 is characterized in that, further comprises the corresponding repeated encoding indication of DIUC of distribution in the described Burst request-reply.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011015085A1 (en) * | 2009-08-04 | 2011-02-10 | 中兴通讯股份有限公司 | Method and device for generating downlink(dl)/uplink(ul) map message |
| WO2011157023A1 (en) * | 2010-06-18 | 2011-12-22 | 中兴通讯股份有限公司 | Method and base station for updating modulation and coding mode |
| CN103052074A (en) * | 2011-10-12 | 2013-04-17 | 中兴通讯股份有限公司 | Method and device for reducing uplink co-channel interference |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1219409C (en) * | 2001-10-30 | 2005-09-14 | 中兴通讯股份有限公司 | Time-division multiple access burst frame synchronizing method of base station radio interface |
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2006
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011015085A1 (en) * | 2009-08-04 | 2011-02-10 | 中兴通讯股份有限公司 | Method and device for generating downlink(dl)/uplink(ul) map message |
| CN101990246A (en) * | 2009-08-04 | 2011-03-23 | 中兴通讯股份有限公司 | Generation method and device of downlink/uplink frame channel allocation message |
| WO2011157023A1 (en) * | 2010-06-18 | 2011-12-22 | 中兴通讯股份有限公司 | Method and base station for updating modulation and coding mode |
| CN103052074A (en) * | 2011-10-12 | 2013-04-17 | 中兴通讯股份有限公司 | Method and device for reducing uplink co-channel interference |
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