Abstract:
A networking method of single frequency network in a TD-SCDMA system includes the steps of: (1) deciding a networking configuration scheme by a universal mobile telecommunications system terrestrial radio access network (UTRAN), (2) based on the decided networking configuration scheme, configuring an intra-frequency cell info list information element and an inter-frequency cell info list information element in system information and measurement control messages by the UTRAN, (3) transmitting signals over a servicing area by the UTRAN, and (4) receiving the system information and measurement control messages by a user equipment (UE) from the UTRAN, acquiring working mode configuration information of each frequency and each timeslot of a serving cell and neighboring cells, and judging whether there are duplicated cell information elements in the intra-frequency cell info list information element or the inter-frequency cell info list information element.

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application claims priority to Chinese Patent Application No. 200710036963.7, filed on Jan. 30, 2007, the disclosure of which is incorporated herein by reference in its entirety. 
     TECHNICAL FIELD 
     The present invention relates generally to a 3 rd  generation Universal Mobile Telecommunications System (UMTS). More particularly, the present invention relates to networking methods for a Single Frequency Network (SFN) in a TD-SCDMA system. 
     BACKGROUND 
     Traditional broadcasting networks, such as analog telecast systems, are Multi-Frequency Networks (MFN). These networks operate several transmitters each on different frequencies in different service areas to avoid interfering with one another. In MFN mode, a TV channel requires a large amount of frequency bandwidth to reach a large coverage and thus results in low spectral efficiency. 
     As spectrum resources become scarce, Single Frequency Network (SFN) becomes a hot spot. An SFN is created when all the transmitters in a network service area operate on the same carrier frequency. In an SFN, multiple transmitters over an area simultaneously transmit identical signals (simulcast) on the same physical resource (time, resource block). From the receiver (for example, the terminal) point of view, the received signal is indistinguishable from a single (cell) transmission. Delayed versions of the signal due to the multi-cell transmission are observed at the receiver. These delayed versions may be treated as multi-path components of the signal and can be combined in the receiver. By doing so, inter-cell interference can be transformed into useful signal energy, and the distribution of carrier to interference ratio across the coverage area is improved. 
     SFNs are primarily defined in terms of coverage areas (SFN areas), i.e., the set of cells that are participation in the simulcast transmissions. The cells and content in each SFN need to be tightly synchronized and coordinated. 
     SFN can work with multi-carrier modulation technique such as Orthogonal Frequency Division Multiplexing (OFDM). OFDM has been introduced into the Long Term Evolution (LTE) of 3GPP standards. The frame structure of LTE TDD (time division duplex) mode is similar to that of TD-SCDMA. 
     In CDMA systems operating in the SFN mode, signals from different base stations may be treated as multi-path components. This leads to a higher demand on mobile receivers to tolerate a higher delay spread of multi-path signals whose power levels are similar to that of the main-path signal. As a result, the time synchronization and the transmission synchronization among different base stations can have a significant impact on the receiving ability of mobile receivers. 
     Originally, streaming media is the transmission method for transmitting television programs over a mobile communication system. Compared to 2.5G techniques, 3G techniques provide higher data rate and support for higher spectral efficiency. 3G brings new chances to develop mobile television. 
     MBMS (Multimedia Broadcast Multicast Service) is introduced in 3GPP R6 in order to provide more multimedia services than streaming media. The main evolution of MBMS include a new network element of BM-SC, upgrade of existing network elements of PS domain for new MBMS interfaces (such as Gmb), new Channels (such as MICH, MTCH/MCCH/MSCH), new physical procedures (such as FACH channel selection combining, PTM and PTP handover), and new service procedure (such as subscription). 
     On the side of user equipment (UE), MBMS inherits from existing 3GPP standards as much as possible, except for a higher processing ability of base band. 
     TD-SCDMA is a part of 3G standards, which is an N-frequency system, i.e., a type of multi-carrier system. The number of carriers is N in a cell, and one of these carriers is the primary frequency, and the others (number of N−1) are secondary frequencies. The frequency used by UE is named the working frequency. 
       FIG. 1  shows a simplified example of a typical mobile communication system. The system has cells  100   1 - 100   Z  ( 100 ), each cell composed of a NodeB (Base Station)  101   1 - 101   Z  ( 101 ), and a number of UE  102   1 - 102   K  ( 102 ). Each UE  102  connects with NodeB  101  in a serving cell  100  by a radio channel to communicate with other network elements. The direction from UE  102  to NodeB  101  is named the uplink, and from NodeB  101  to UE  102  is named the downlink. NodeB  101  is controlled by RNC (Radio Network Controller)  103 . Together, NodeB  101 , RNC  103 , and some other network elements constitute the UTRAN (U MTS Terrestrial Radio Access Network)  110 . 
       FIG. 2  shows the frame structure of a TD-SCDMA system. The structure is specified by 3GPP Technical Specification 25.221. The chip rate of TD-SCDMA is 1.28 Mcps. The time duration of each Radio Frame  200  is 10 ms identically divided into two sub-frames,  201   0 - 201   1 , ( 201 ). Time duration of each sub-frame is 5 ms, i.e., 6400 chips. A sub-frame includes 7 Timeslots (from TS 0  to TS 6 )  202   0 - 202   6 , two pilot timeslots that are downlink pilot timeslot (DwPTS)  203  and uplink pilot timeslot  205 , and a guard period (GP)  204 . Furthermore, TS 0   202   0  is used for downlink that carries only system broadcast channel and other downlink traffic channels. The six timeslots, from TS 1  to TS 6   202   1 - 202   6 , are used to transmit downlink and uplink traffic channels. UpPTS  205  and DwPTS  203  are used for acquisitions of uplink and downlink synchronization, respectively. Time duration of these timeslots, from TS 0  to TS 6   202   0 - 202   6 , are 0.675 ms, i.e., 864 chips. Each timeslot includes two data parts (Data Part  1   208  and Data Part  2   210 ), and a 144-chip long training sequence (midamble  209 ). Midamble  209  is important for channel estimation, cell identification, and other procedures in TS-SCDMA. DwPTS  203  includes a 32 chip long GP  211  and a 64 chip long downlink sync code (SYNC-DL)  206 . UpPTS  205  includes a 128 chip long uplink sync code (SYNC-UL)  207 . There is a switch point  212  in the six timeslots from TS 1  to TS 6   202   1 - 202   6  and is located between TS 3   202   3  and TS 4   202   4  when there are 3 uplink timeslots and 3 downlink timeslots. 
     In an N-Frequency TD-SCDMA system, over Secondary frequencies, TS 0   202   0  and DwPTS  203  aren&#39;t transmitted in order to reduce co-channel interference between adjacent cells because of the omni transmission of TS 0  and DwPTS signals without beam-forming. 
       FIG. 3  shows an example of a typical N-Frequency networking schematic, which is a 5 MHz networking with N equal to 3. There are 3 carriers in each cell, and one is the primary frequency  301 , and the other two are secondary frequencies ( 302  and  303 ). TS 1 , TS 2  and TS 3  ( 202   1 - 202   3 ) are uplink timeslots; TS 4 , TS 5  and TS 6  ( 202   4 - 202   6 ) are downlink timeslots. Furthermore, the uplink/downlink ratio is configurable. 
     In an N-frequency scheme, in order to reduce co-channel interference, secondary frequencies ( 302  and  303 ) do not transmit DwPTS  203  and do not transmit pilot channel over TS 0   202   0 . Frequency planning should be used in order to avoid adjacent cells having the same primary frequency. Techniques such as frequency planning, antenna locating, and sector area dividing should may be used. The main frequency of the adjacent areas should be different. 
     In TD-SCDMA, smart antenna technique is important. The transmission methods of signal, such as omni transmission of broadcasting or transmission with beam-forming, can lead to different networking methods. 
     In existing 3GPP or TD-SCDMA technical specification, according to the status whether it is same as the working frequency of UE, a frequency is categorized as intra-frequency or inter-frequency. In the messages that UTRAN sends to UE, such as Measurement Control or System Information message, there are two frequency measurement lists—“Intra-frequency cell info list” and “Inter-frequency cell info list. Each element in these lists indicates “cell info” information element (IE). In addition to IEs in “Intra-frequency cell info list”, elements in “Inter-frequency cell info list” includes a “Frequency info” IE. Therefore, the corresponding frequency of all “cell info” IE in “Intra-frequency cell info list” is the same as the working frequency of UE. There is no frequency information in “cell info” IE. 
       FIG. 4  shows an example of UTRAN sending the information of serving cell and neighboring cells to UE in different states. UTRAN  110  builds a SYSTEM INFORMATION  401  message and broadcasts the message. UE  102  receives this message in idle mode, and then updates local stored information according to the received message; if necessary, UE  102  can measure the Measurement Quantity specified by the message. UTRAN  110  also sends MEASUREMENT CONTROL  402  message to offer information of serving and neighboring cells to UE  102  in connection mode. 
     The SYSTEM INFORMATION  401  message and MEASUREMENT CONTROL  402  message include measurement object list, measurement quantity, and other information. Such information is classified into inter-frequency list and intra-frequency list. Tables 1˜4 show some common IEs in the two messages in existing 3GPP and TD-SCDMA technical specifications. 
     Table 1 and Table 2 show parts of “Intra-frequency cell info list” IE  30  and “Inter-Frequency cell info list” IE  40 , which inform UE  102  of the objects list of intra-frequency and inter-frequency, respectively. 
     
       
         
               
             
               
               
               
               
             
               
               
               
             
           
               
                 TABLE 1 
               
             
             
               
                   
               
               
                 Parts of Intra-frequency cell info list IE 
               
             
          
           
               
                 Information 
                   
                   
                   
               
               
                 Element/ 
                   
                   
                   
               
               
                 Group 
                   
                   
                 Semantics 
               
               
                 Name 30 
                 Multi 
                 Type and reference 
                 description 
               
               
                   
               
             
          
           
               
                 New intra- 
                 1 to 
                   
               
               
                 frequency 
                 &lt;maxCellMeas&gt; 
                   
               
               
                 cells 31 
                   
                   
               
               
                 &gt;Intra- 
                   
                 Integer 
               
               
                 frequency 
                   
                 (0 . . . &lt;maxCellMeas&gt;−1) 
               
               
                 cell id 32 
                   
                   
               
               
                 &gt;Cell info 33 
               
               
                   
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
             
           
               
                 TABLE 2 
               
             
             
               
                   
               
               
                 Parts of Inter-frequency cell info list IE 
               
             
          
           
               
                 Information 
                   
                   
                   
               
               
                 Element/ 
                   
                   
                   
               
               
                 Group 
                   
                   
                 Semantics 
               
               
                 Name 40 
                 Multi 
                 Type and reference 
                 description 
               
               
                   
               
               
                 New inter- 
                 1 to 
                   
                   
               
               
                 frequency 
                 &lt;maxCellMeas&gt; 
                   
                   
               
               
                 cells 41 
                   
                   
                   
               
               
                 &gt;Inter- 
                   
                 Integer 
                   
               
               
                 frequency 
                   
                 (0..&lt;maxCellMeas&gt;−1) 
                   
               
               
                 cell id 42 
                   
                   
                   
               
               
                 &gt;Frequency 
                   
                   
                   
               
               
                 info 43 
                   
                   
                   
               
               
                 &gt;Cell info 33 
               
               
                   
               
             
          
         
       
     
     IE  30  is a structure array whose dimension is identified by “New intra-frequency cells” IE  31 . Each element in the array includes two IEs, “Intra-frequency cell id” IE  32  and “Cell info” IE  33 . The structure of IE  40  is similar to IE  30  while the main differences between them is that there is a “Frequency info”  43  IE in IE  40 . 
     As to TD-SCDMA system, value of “maxCellMeas” equals 32. Table 3 shows the TDD parts of “Cell Info” IE  33  that pertains to cell information. “Primary CCPCH info” IE  51  provides information of P-CCPCH channel; “Timeslot list” IE  52  provides information of timeslot count maybe be measured by UE; “Timeslot number” IE  53  then indicates which timeslot should be measured. 
     Table 4 shows TDD parts of “Primary CCPCH info” IE  51 . “Cell parameters ID” IE  61  provides identification information of primary frequency of a cell. The identification information is important for UE to distinguish the basic Mid-amble code and scramble code of a cell. 
     
       
         
               
             
               
               
               
               
             
           
               
                 TABLE 3 
               
             
             
               
                   
               
               
                 TDD parts of Cell info IE 
               
             
          
           
               
                 Information Element/Group 
                   
                 Type and 
                 Semantics 
               
               
                 Name 33 
                 Multi 
                 reference 
                 description 
               
               
                   
               
               
                 &gt; Primary CCPCH info 51 
                   
                   
                   
               
               
                 &gt; Primary CCPCH Tx power 
                   
                   
                   
               
               
                 &gt;Timeslot list 52 
                 1 to &lt;max TS. 
                   
                   
               
               
                 &gt;&gt;Timeslot number 53 
                   
                 Integer 
                   
               
               
                   
                   
                 (0 . . . 6) 
               
               
                   
               
             
          
         
       
     
     
       
         
               
             
               
               
               
               
             
           
               
                 TABLE 4 
               
             
             
               
                   
               
               
                 TDD parts of Primary CCPCH info IE 
               
             
          
           
               
                 Information Element/Group 
                   
                   
                 Semantics 
               
               
                 Name 51 
                 Multi 
                 Type and reference 
                 description 
               
               
                   
               
               
                 &gt;&gt;Cell parameters ID 61 
                   
                 Integer(0 . . . 127) 
                   
               
               
                   
               
             
          
         
       
     
     In TD-SCDMA systems, the following technical problems of applying SFN mode might be encountered: 
     The timeslot of a cell in SFN mode is the same as that of its neighboring cells. Thus, the timeslot should be transmitted unidirectionally and without beam-forming. Therefore, the same timeslot of neighboring cells could not work on an N-frequency mode for co-channel interference. 
     The “Cell parameters ID” of a timeslot in SFN mode configured by a cell must be the same as its neighboring cells. And the other timeslots of this cell working on N-frequency mode should apply cell-specific “Cell parameters ID”. Thus, there are maybe two or more different “Cell parameters ID” in the same cell. However, a “Primary CCPCH info” IE  51  could only contain one “Cell parameters ID” IE  61 . 
     UE could not distinguish if a timeslot is in SFN mode or in N-frequency mode. 
     In summary, existing N-frequency scheme of TD-SCDMA is not suitable for mobile TV services. SFN scheme can provide higher spectral efficiency. And existing messages between UTRAN and UE may not be suitable for information transmission of SFN configuration. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows a simplified example of a typical mobile communications system. 
         FIG. 2  shows the frame structure of a TD-SCDMA system. 
         FIG. 3  shows an example of a typical N-Frequency (5 MHz) networking scheme. 
         FIG. 4  shows an example of UTRAN sends the information of serving cell and neighboring cells to UE in different states. 
         FIG. 5  shows the Time Division of N-Frequency timeslots and SFN timeslots according to some embodiments of the present invention. 
         FIG. 6  shows the Frequency Division of N-Frequency timeslots and SFN timeslots according to some embodiments of the present invention. 
     
    
    
     DETAILED DESCRIPTION 
     The present invention provides methods and systems, in which SFN and N-frequency networks can coexist with each other in a network. As a result, a higher spectral efficiency can be achieved than a pure N-frequency network. Meanwhile, present invention provides compatible and flexible methods that the configuration information of SFN mode can be transmitted base on existing message information element structure. Even though the invention is described below using a TD-SCDMA system as an example, one skilled in the art would recognize that the invention can also be implemented and/or adapted to be used in other communication systems. As a result, the invention described below is not limited only to TD-SCDMA systems. 
     One embodiment of a method includes a SFN networking method in TD-SCDMA system. The method includes the following operations. Step A 1 : UTRAN  110  decides a networking configuration scheme including the physical resources working on N-frequency mode  504  or SFN mode  505  including the used frequencies and timeslot. 
     Step A 2 : Based on the configuration in step A 1 , UTRAN  110  configures the “Intra-frequency cell info list” IE  30  and “Inter-frequency cell info list” IE  40  in SYSTEM INFORMATION  401  and MEASUREMENT CONTROL  402  messages. The “Cell parameters Id” IE  61  is configured in “Cell Info” IE  33  of IE  30  and IE  40 , and the timeslot number of the “Cell parameters Id” IE  61  is identified by “Timeslot number” IE  53 . 
     Step A 3 : UTRAN  110  transmits signals over servicing area. 
     Step A 4 : UE  102  receives SYSTEM INFORMATION  401  and MEASUREMENT CONTROL  402  messages from UTRAN  110 , acquires the working mode configuration information of each frequency and each timeslot of serving cell and neighboring cells, and judges whether there are duplicated “Cell Info” IE  33  in “Intra-frequency cell info list” IE  30  or “Inter-frequency cell info list” IE  40 . This step also includes the following operations: 
     Step A 4 . 1 : If the result of the judgment is “Yes”, over the corresponding frequency of “Cell Info” IE  33 , UE  102  can affirm timeslot identified by “Timeslot Number” IE  53  as working on SFN mode  505 . 
     Step A 4 . 2 : If the result of the judgment is “No”, over the corresponding frequency of “Cell Info” IE  33 , UE  102  can affirm timeslot identified by “Timeslot Number” IE  53  as working on N-frequency mode  504 . 
     In Step A 1 , the principles of networking scheme include: 
     A 1 . 1 : The division between the physical resource of N-Frequency mode  504  and SFN mode  505  can be time or frequency, i.e., one unit of physical channel resource can not work on both of these two modes at the same time and the same frequency. 
     A 1 . 2 : Physical resources working on SFN mode  505  of a cell is identical to the resources of its neighboring cells. 
     A 1 . 3 : There is at least one TS 0  timeslot  509  working on N-frequency mode each cell. 
     A 1 . 4 : Timeslots of SFN mode work on downlink direction only, i.e., the direction from UTRAN  110  to UE  102 . 
     A 1 . 5 : If TS 0  timeslot  604  works on SFN mode, DwPTS timeslot  605  of the same cell and same frequency works on SFN mode too. 
     A 1 . 6 : In a cell, configuration of count of timeslot working on SFN mode of a frequency is independent of the configuration of another frequency, i.e., counts of timeslot working on SFN mode can be different or same between different frequencies. 
     A 1 . 7 : Configuration of working mode of a downlink timeslot is independent of the working mode of another timeslot, i.e., working mode of a timeslot is not dependent on mode of another timeslot. 
     A 1 . 8 : The multiple access schemes of timeslots working on SFN mode  505 . The multiple access schemes can be CDMA or OFDMA. 
     In Step A 2 , the operations also include the following: 
     A 2 . 1 : Either SFN mode  505  or N-frequency mode  504 , working mode of timeslots, identified by “Timeslot number” IE  53  in a “Cell info” IE  33 , may be the same. 
     A 2 . 2 : If a “Cell parameters ID” IE  61  is used by SFN mode  505 , in “New intra-frequency cells” IE  31  or “New inter-frequency cells” IE  41  lists, the “Cell info” IE  33  including this IE  61  should be duplicated once and only once. 
     In Step A 3 , the operations also include the followings: 
     A 3 . 1 : UTRAN  110  broadcasts SYSTEM INFORMATION  401  message over its serving area using the TS 0  timeslot  509  working on N-frequency mode, and transmits MEASUREMENT CONTROL  402  message to UE  102  in connection mode. 
     A 3 . 2 : Except for the pilot channel over TS 0  timeslot  509 , timeslots working on N-frequency mode  504  can be transmitted with beam-forming. 
     A 3 . 3 : Timeslots working on SFN mode  505  can be transmitted without beam-forming. 
     A 3 . 4 : Signals transmitted over timeslots working on SFN mode  505  of a cell can be identical with signals over the same timeslots and same frequency of neighboring cells. 
     A 3 . 5 : Service information of broadcasting or multicast about timeslot working on SFN mode  505  are transmitted over the TS 0  timeslot  509  working on N-frequency mode  504 , or over the physical channels identified by the broadcasting messages on this TS 0  timeslot  509 . 
     The method can also include the following Step A 5 : 
     Step A 5 : UE  102  receives the messages of Step A 3 . 5 , acquires the service information about timeslots working on SFN mode  505 , transmits them to Man Machine Interface (MMI), and then provides options to a user to subscribe these services. If the user choices “Yes”, the step also including the following: 
     A 5 . 1 : UE  102  begins the Authentication and Certification procedure of these services over SFN based on the service information. 
     A 5 . 2 : UE  102  receives traffic data from SFN timeslots  505 . 
     If the services over SFN don not need Authentication and Certification, the step A 5 . 1  can be skipped. 
     According to several embodiments of the present invention, in a TD-SCDMA system, SFN and N-frequency network can coexist with each other by a flexible network planning. The physical resource working between the two modes can be adjusted dynamically. Meanwhile, present invention provides a compatible and flexible method that the configuration information of SFN mode can be transmitted base on existing message information element structure. 
       FIG. 5  shows the Time Division of N-Frequency timeslots and SFN timeslots according to some embodiments of the present invention. 
     In an existing N-frequency network, there are 3 frequencies within 5 MHz bandwidth of each cell, including one primary frequency  501  and two secondary frequencies  502  and  503 . Timeslots from TS 0  to TS 2  work on N-frequency mode, from TS 3  to TS 5  work on SFN mode, and TS 6  works on N-frequency. On every frequency, TS 2  timeslot  506  and TS 6  timeslot  508  are downlink timeslots, TS 1  timeslot  507  is the uplink one. Broadcasting channel is allocated in TS 0  timeslot  509  working on N-frequency. SYSTEM INFORMATION  401  message is transmitted by TS 0  timeslot  509 , and the mobile television programs are transmitted by timeslots  505  working on SFN mode. UE completes the authentication and certification procedures of these SFN services by the uplink timeslot  507 , and the downlink timeslots  506  and  508 . 
     As shown in  FIG. 6 , SFN mode and N-frequency mode are divided by frequency. Some extra secondary frequencies  601 ,  602 , and  603  are working on SFN mode; and frequencies  501 ,  502  and  503  are working on N-frequency mode. 
     The networking method of these described embodiments include: 
     Step A 1 : UTRAN  110  decides a networking configuration scheme including the physical resources (e.g., the used frequencies and timeslot) working on N-frequency mode  504  or SFN mode  505 . 
     A 1 . 1 : The way of division between the physical resource of N-Frequency mode  504  and SFN mode  505  can be time or frequency, i.e., one unit of physical channel resource can not work on both of these two modes at the same time and at the same frequency. 
     A 1 . 2 : Physical resources working on SFN mode  505  of a cell is identical to the resources of its neighboring cells. 
     A 1 . 3 : There is at least one TS 0  timeslot  509  working on N-frequency mode each cell. 
     A 1 . 4 : Timeslots of SFN mode work on downlink direction only, i.e., the direction from UTRAN  110  to UE  102 . 
     A 1 . 5 : If TS 0  timeslot  604  works on SFN mode, DwPTS timeslot  605  of the same cell and same frequency works on SFN mode too. 
     A 1 . 6 : In a cell, count of timeslot working on SFN mode of a frequency can be different than other frequencies. 
     A 1 . 7 : All downlink timeslots of a frequency can all work on SFN mode or on N-frequency mode. 
     A 1 . 8 : On a frequency, timeslots working on SFN mode  505  can be discontinuous in a sub-frame. A SFN timeslot can be inserted into two N-frequency timeslots. 
     A 1 . 9 : On a frequency, timeslots working on N-frequency mode  504  can be discontinuous in a sub-frame. An N-frequency timeslot can be inserted into two SFN timeslots. 
     A 1 . 10 : The multiple access schemes of timeslots working on SFN mode  505  can be CDMA or OFDMA. 
     Step A 2 : Based on the configuration in step A 1 , UTRAN  110  configures the “Intra-frequency cell info list” IE  30  and “Inter-frequency cell info list” IE  40  in SYSTEM INFORMATION  401  and MEASUREMENT CONTROL  402  messages. The “Cell parameters Id” IE  61  is configured in “Cell Info” IE  33  of IE  30  and IE  40 , and the timeslot number of the “Cell parameters Id” IE  61  is identified by “Timeslot number” IE  53 . 
     Step A 2  also includes the following: 
     A 2 . 1 : Either SFN mode  505  or N-frequency mode  504 , working mode of timeslots, as identified by “Timeslot number” IE  53  in a “Cell info” IE  33 , must be the same. 
     A 2 . 2 : If a “Cell parameters ID” IE  61  is used by SFN mode  505 , in “New intra-frequency cells” IE  31  or “New inter-frequency cells” IE  41  lists, the “Cell info” IE  33  including this IE  61  may be duplicated once and only once. 
     Step A 3  UTRAN  110  transmits signals over servicing area and includes the followings: 
     A 3 . 1 : UTRAN  110  broadcasts SYSTEM INFORMATION  401  message over the serving area using the TS 0  timeslot  509  working on N-frequency mode, and transmits MEASUREMENT CONTROL  402  message to UE  102  in connection mode. 
     A 3 . 2 : Except for the pilot channel over TS 0  timeslot  509 , timeslots working on N-frequency mode  504  can be transmitted with beam-forming. 
     A 3 . 3 : Timeslots working on SFN mode  505  can be transmitted without beam-forming. 
     A 3 . 4 : Signals transmitted over timeslots working on SFN mode  505  of a cell is identical with signals over the same timeslots and same frequency of neighboring cells. 
     A 3 . 5 : Service information of broadcasting or multicast about timeslot working on SFN mode  505  are transmitted over the TS 0  timeslot  509  working on N-frequency mode  504 , or over the physical channels identified by the broadcasting messages on this TS 0  timeslot  509 . 
     Step A 4 : UE  102  receives SYSTEM INFORMATION  401  and MEASUREMENT CONTROL  402  messages from UTRAN  110 , acquires the working mode configuration information of each frequency and each timeslot of serving cell and neighboring cells, and judges whether there are duplicated “Cell Info” IE  33  in “Intra-frequency cell info list” IE  30  or “Inter-frequency cell info list” IE  40 . This operation can also include the following: 
     Step A 4 . 1 : If the result of the judgment is “Yes”, over the corresponding frequency of “Cell Info” IE  33 , UE  102  can affirm timeslot identified by “Timeslot Number” IE  53  as working on SFN mode  505 . 
     Step A 4 . 2 : If the result of the judgment is “No”, over the corresponding frequency of “Cell Info” IE  33 , UE  102  can affirm timeslot identified by “Timeslot Number” IE  53  as working on N-frequency mode  504 . 
     Step A 5 : UE  102  receives the messages of Step A 3 . 5 , acquires the service information about timeslots working on SFN mode  505 , transmits them to Man Machine Interface (MMI), and then provides options to users to subscribe these services or not. If user choices “Yes”, the step also including the followings: 
     A 5 . 1 : UE  102  begins the Authentication and Certification procedure of these services over SFN based on the service information. 
     A 5 . 2 : UE  102  receives traffic data from SFN timeslots  505 . 
     If the services over SFN need not Authentication and Certification, Step A 5 . 1  can be skipped. 
     In some embodiments, the count of timeslots working on SFN mode can be different between different frequencies, but should be same on a same frequency between different cells. 
     A number of implementations of the invention have been described. Nevertheless, it will be understood that various modifications may be made without departing from the spirit and scope of the invention. Accordingly, other implementations are within the scope of the following claims.