CN1402916A - Method for signaling radio channel structure in radio communication system - Google Patents
Method for signaling radio channel structure in radio communication system Download PDFInfo
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- 238000000034 method Methods 0.000 title claims description 31
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- 230000005540 biological transmission Effects 0.000 description 7
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- 238000012423 maintenance Methods 0.000 description 1
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- 238000005192 partition Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W48/00—Access restriction; Network selection; Access point selection
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Abstract
根据本发明，由基站以无线块的信道专用格式发送至少一个信令信道，以及由进行接收的用户台借助所述无线块的格式推导出无线信道结构。
According to the invention, at least one signaling channel is transmitted by the base station in a channel-specific format of a radio block, and a radio channel structure is derived by a receiving subscriber station using the format of the radio block.
Description
The present invention relates in wireless communication system, especially in mobile radio system, send the method for wireless channel structure with signaling.
In wireless communication system, transmit through wave point with electromagnetic wave such as information such as voice, image information or other data, this wave point is between transmitting radio platform and reception radio station, and for example they are base station and travelling carriage under the situation of mobile radio system.At this, electromagnetic emission uses the carrier frequency that is positioned at for the frequency band of relevant system defined to realize.In GSM mobile radio system (global system for mobile communications), carrier frequency is the scope that is positioned at 900MHz, 1800MHz and 1900MHz.For the following mobile radio system that uses CDMA and TD/CDMA transmission method through wave point, for example UMTS (Universal Mobile Telecommunications System) or other system of the third generation, assigned frequency is in the scope of about 2000MHz.Divide into so-called fdd mode (Frequency Division Duplexing (FDD)) and tdd mode (time division duplex) at above-mentioned UMTS mobile radio system.The feature of described tdd mode is that especially public frequency band both had been applied to the signal transmission of up direction (UL), be used to the signal transmission of down direction (DL) again, and described fdd mode is to use frequency band corresponding at transmission direction.
In the said GSM mobile radio system, some signaling channel is to be sent by base station or subscriber board in fixing time slot.This signaling channel for example also comprises teamed channel BCCH (Broadcast Control Channel), it is compared with normal communication traffic channel is that transmitting power with higher sends, and includes the information about each wireless area of mobile radio system structure or base station.Send in the frequency band that this teamed channel BCCH is always provided in wireless area in first time slot of time frame and with certain carrier frequency.When being linked into mobile radio system first, obtain the dwell point (frequency and time slot) of the teamed channel BCCH in the wireless area at its place by subscriber board, and in its reception with derive the structure of wave point after analyzing.
In the third generation UMTS in future mobile radio system, a plurality of signaling channels will use public radio channel resource probably.Under the tdd mode of UMTS mobile radio system, teamed channel BCH (beacon channel) and FACH (forward access channel) and wait other signaling channel to use public radio channel resource such as PCH (calling channel) in case of necessity according to time division multiplexing.This radio channel resource for example is certain interior extended code of first time slot of a time frame.When inserting subscriber board first, this subscriber board is owing to still unknown time sequencing does not know it is at current which signaling channel that received, therefore the error analysis of the synchronous of mistake or butt joint collection of letters signaling channel can be occurred in some cases, and very long lock in time can be occurred.A solution of this problem for example just is to introduce a special channel, describes described time division multiplexing structure by it, perhaps for example utilizes the so-called header in the channel wireless piece to come the corresponding signaling channel of mark clearly.But two kinds of solutions all have individual shortcoming, and promptly they have fettered nervous Radio Resource, thereby make these resources can not be provided for transfer of data again.
The present invention based on task be to provide a kind of method, to realize sending the wireless channel structure with signaling simply.This task is solved by the described base station system of feature of described method of the feature of independent claims 1 and independent claims 10.Improvement project of the present invention is provided by dependent claims.
According to the present invention, send at least one signaling channel by the base station with the channel professional format of radio block, and derive the wireless channel structure by the form of described radio block by the subscriber board that receives.
This method of the present invention can preferably realize: subscriber board can utilize the form of the respective wireless piece of signaling channel to discern this signaling channel when access to wireless communication system first, and need not to produce additional signaling by the special signaling district in special channel or the radio block.Preferably, described form also is different from the form of proper communication Traffic Channel.
According to first improvement project of the present invention, use identical radio channel resource according to time-division multiplexing method by at least two signaling channels.For this method that can preferably be applied to above-mentioned UMTS mobile radio system, subscriber board can be discerned corresponding signaling channel clearly, and realizes synchronous apace according to this wireless channel structure thus.At this, in simple T DMA customer separating method, radio channel resource can be a time slot in the frequency band, and perhaps in abideing by another partition method of CDMA method, radio channel resource can be the one or more extended codes in the tdma slot.
According to second kind of selection improvement project of the present invention, the respective wireless piece of described signaling channel can be distinguished by the data of special length or order.If subscriber board uses a kind of known fault identification mechanism according to another improvement project, just then it for example can realize distinguishing by the data length in the radio block of described signaling channel.Refusal adopts oversize and too short data division in this class mechanism.Have only when the desired length of data length and this mechanism is consistent, just analyze and transmit at higher protocol instance place.This equally also is applicable to the data of special order.Have only when being correct with the data identification that receives, just it is analyzed by described mechanism.Usually can stipulate: have only when the data that receive are consistent with the structure of one or more signaling channels of looking for, described fault identification mechanism is this data identification correct just and analyzes it.
Select improvement project according to another kind, the form of described signaling channel is identically selected in all wireless areas of described wireless communication system, or ad hoc distinguishes by wireless area.Preferably, under the identical situation of form, subscriber board in each wireless area need not special ABC and just can obtain described wireless channel structure simply, and in the signaling of taking can realize under the form situation of wireless area special use implicit expression, and discern corresponding wireless area by subscriber board thus, so, the signaling channel that described subscriber board can be distinguished such as send in adjacent wireless area simultaneously.
Method of the present invention can be applied to take to mix the wireless communication system of TD/CDMA customer separating method highly beneficially.
Existing wireless communication system parts of telling about method of the present invention in detail and cooperating with it by accompanying drawing.Wherein:
Fig. 1 shows the circuit block diagram of wireless communication system, especially mobile radio system,
Fig. 2 shows the frame structure and the wireless block structured schematic diagram of wave point,
Fig. 3 shows the order of a plurality of time frames with different signaling channels, and
Fig. 4 shows the radio block of the signaling channel with different data format.
Fig. 1 shows the part of mobile radio system, with the embodiment as wireless communication system architecture.Mobile radio system always comprises many mobile station MSC (mobile switching centre), they belong to a switching network (SSS switching subsystem), and be interconnected to the inlet that net and foundation enter fixed network PSTN, also comprise one or more base station system BSS (base station sub-system) that are connected with these mobile stations MSC separately.Base station system BSS has at least one device RNC (radio network controller) that is used to distribute the wireless technology resource again and at least one is attached thereto the base station NB (Node B) that connects respectively.
Base station NB can set up through wave point and lead to being connected of subscriber board UE (subscriber equipment) with maintenance.Each base station NB constitutes at least one wireless area Z.The size of wireless area Z generally depends on the operating distance of the teamed channel BCH that is launched with bigger and constant separately transmitting power by base station NB.Be divided in the cell structure sector or in layering, each base station NB also can manage a plurality of wireless area Z.
The embodiment of Fig. 1 shows two subscriber board UE that are arranged in the wireless area Z of base station NB.Subscriber board UE has set up one and has led to communicating to connect of base station NB, realizes that at up direction UL and down direction DL the signal of selected business transmits on this connects.Communicating to connect will be by one or more extended code of distributing to subscriber board UE and separate from be configured in communicating to connect in the wireless area Z simultaneously, wherein, in order to receive the signal that communicates to connect of oneself according to known associated detecting method, subscriber board UE has for example utilized current all extended codes of being distributed separately in wireless area Z.
The typical frame structure of wave point as seen from Figure 2, it for example is implemented tdd mode that is used for following UMTS mobile radio system and the TD-SCDMA mobile radio system that is used for following China with other version.According to the TDMA component stipulate with one for example bandwidth be that the broadband band segmentation of B=5MHz is a plurality of time slot ts, 16 time slot ts0-ts15 for example.Constitute a channel by each the time slot ts in the frequency band B.In the frequency band B of broadband, come layout time slot ts in succession according to frame structure.So 16 time slot ts0～ts15 are combined into a time frame fr.A plurality of time frame fr that accompany have just produced a multi-frame.
When using the TDD transmission method, the part of time slot ts0-ts15 is used for up direction UL, and the part of time slot ts0-ts15 is used for down direction DL, and wherein, the transmission in the up direction UL for example is to realize before the transmission in down direction DL.Have therebetween and put SP (SP switching point) switching time, this switching time point can according to transmission channel in requisition for and located neatly to be used for up direction and down direction.By being that upstream or downstream direction UL, DL distribute time slot ts, can carry out diversified asymmetrical resource allocation with changing.
In time slot ts, will transmit the information of a plurality of connections with the form of radio block fb.Data d connects exclusively with a kind of fine structure, also promptly plant extended code c expands, and makes that can separate many by this CDMA (code division multiple access) component at receiver side connects.According to defining the radio channel resource that can be used to command transmitting information or useful information by channel and the formed combination of extended code c.It is T that the expansion of each symbol of data d has caused transmitting Q time delay in symbol time delay Tsym
ChipChip.This moment, Q chip constituted the extended code c that connects special use.In radio block fb, also arrange one in addition and be generally the training sequence tseq1 that communicates to connect special use ..., it is used to the channel estimating of receiver side.In addition, in time slot ts, also be provided with a guard time gp, to compensate the unlike signal propagation time of the connection of time slot ts in succession.For transmitting at down direction DL, some signaling channel such as BCH that determine are to use identical radio channel resource with FACH in each time frame, wherein this radio channel resource is for example always corresponding to first extended code in the first time slot ts0 of a time frame fr.But for fear of send this channel simultaneously in adjacent wireless area Z, these radio channel resources also can that is to say for example to change each distributed time slot ts of institute with certain time sequencing in described time frame fr " moving ".
Figure 3 illustrates a plurality of time frame fr1 ... the typical sequence of fr4 is used identical radio channel resource to be used to explain by a plurality of signaling channel BCH, FACH, has wherein only provided each time frame fr1 respectively ... the first time slot ts0 of fr4.Signaling channel BCH and FACH use by the first time slot ts0 and the defined common radio channel resource of the first extended code c1 in time-multiplexed mode.
The subscriber board UE of access to wireless communication system at first searches teamed channel BCH first, sets up to be used for ensuing connection because this teamed channel has sent important information.In addition, this channel also can be received by the subscriber board UE that is positioned at the wireless area boundary vicinity well owing to its higher transmitting power.Subscriber board UE oneself knows that described teamed channel BCH utilizes first radio channel resource (as mentioned above) of time frame fr to send, and attempts detecting described teamed channel BCH at this moment.As shown in the figure, owing to be not to resemble in the known GSM mobile radio system this teamed channel of transmission in all time frame fr, so subscriber board UE must search a plurality of time frame fr under certain conditions continuously to find this teamed channel BCH, detects and analyzed its information fully up to it.
Described teamed channel BCH is to be different data length d with the difference of FACH for example, and what illustrate is the same as shown in Figure 4 routinely.At this, teamed channel BCH has a data field shorter than FACH, and they are respectively 248 bits and 256 bits.Fault identification mechanism in the subscriber board TE is known this length of corresponding data district d.If this mechanism detects oversize data field, for example when receive be FACH rather than BCH the time, just it does not adopt this data field and again trial receive.Repeat this process always, consistent up to received data length with desired length.In higher protocol instance, analyze the described data field that is concealed with information then.If also between each sub-district, change the length of described data field in addition, know in advance that then the subscriber board UE of described respective length just can distinguish signaling channel BCH, the FACH of respective wireless sub-district, and preferably utilize this knowledge to obtain suitable wireless area to establish a communications link.
Claims (10)
1, in wireless communication system, send the method for wireless channel structure with signaling, wherein,
By the base station (NB) of described wireless communication system with the channel professional format of radio block (fb) send at least one signaling channel (BCH, FACH), and
Derive described wireless channel structure by the subscriber board that receives (UE) by the form of described radio block (fb).
2, by the process of claim 1 wherein,
(BCH FACH) uses identical radio channel resource according to time-division multiplexing method by at least two signaling channels.
3, press the method for claim 1 or 2, wherein,
Described signaling channel (BCH, can distinguish by the data (d) of special length by respective wireless piece (fb) FACH).
4, press the method for claim 1 or 2, wherein,
Described signaling channel (BCH, can distinguish by the data (d) of special order by respective wireless piece (fb) FACH).
5, press the method for claim 3 or 4, wherein,
By described subscriber board (UE) by fault identification mechanism detect described corresponding signaling channel (BCH, FACH).
6, press the method for a last claim, wherein,
(BCH, form FACH) are identically selected in all wireless areas (Z) of described wireless communication system for described signaling channel.
7, press the method for one of claim 1～5, wherein,
Described signaling channel (BCH, ad hoc select by wireless area, and can be by the corresponding wireless area of described format identification (Z) by form FACH).
8, press the method for a last claim, wherein,
Described wireless communication system uses a kind of customer separating method based on TDMA, wherein defines a radio channel resource by at least one frequency band (B) and a time slot (ts).
9, press the method for a last claim, wherein,
Described wireless communication system also uses a kind of CDMA customer separating method in addition, and (BCH FACH) distributes at least one extended code (c) to give described signaling channel in a time slot (ts0) of described time frame (fr).
10, the base station of wireless communication system (BSS) has at least one device that is used to distribute the wireless technology resource (RNC) and at least one base station (NB), is used to carry out the method for claim 1.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1999157288 DE19957288C1 (en) | 1999-11-29 | 1999-11-29 | Channel structure signalling in radio communications system |
| DE19957288.7 | 1999-11-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1402916A true CN1402916A (en) | 2003-03-12 |
| CN1157005C CN1157005C (en) | 2004-07-07 |
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| CNB008164223A Expired - Lifetime CN1157005C (en) | 1999-11-29 | 2000-11-28 | Method for signaling radio channel structure in radio communication system |
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| CN (1) | CN1157005C (en) |
| AU (1) | AU2826601A (en) |
| DE (1) | DE19957288C1 (en) |
| WO (1) | WO2001039523A2 (en) |
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| JP3645027B2 (en) * | 1995-09-20 | 2005-05-11 | 松下電器産業株式会社 | Variable length data transceiver |
| DE19747365A1 (en) * | 1997-10-27 | 1999-04-29 | Siemens Ag | Organisation information transmission method for radio communication system |
| DE19842039B4 (en) * | 1998-09-14 | 2014-09-04 | Siemens Aktiengesellschaft | Method for transmitting signaling information in a radio communication system |
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- 2000-11-28 CN CNB008164223A patent/CN1157005C/en not_active Expired - Lifetime
- 2000-11-28 AU AU28266/01A patent/AU2826601A/en not_active Abandoned
- 2000-11-28 WO PCT/DE2000/004227 patent/WO2001039523A2/en active Application Filing
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Also Published As
| Publication number | Publication date |
|---|---|
| DE19957288C1 (en) | 2001-05-10 |
| WO2001039523A2 (en) | 2001-05-31 |
| AU2826601A (en) | 2001-06-04 |
| WO2001039523A3 (en) | 2001-10-25 |
| CN1157005C (en) | 2004-07-07 |
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