Docstoc

Introductions

Document Sample
Introductions Powered By Docstoc
					                                                                                                      IEEE C802.16n-11/0152r1

    Project     IEEE 802.16 Broadband Wireless Access Working Group <http://ieee802.org/16>

    Title       Frame Structure for Talk-around Direct Communications

    Date        2011-09-1420
    Submitted
                                                                       E-mail:
    Source(s)   Young-Ho Jung, Jihoon Choi                             yhjung@kau.ac.kr, jihoon@kau.ac.kr
                Korea Aerospace University
                                                                       scchang@etri.re.kr
                Sungcheol Chang, Seokki Kim, Eunkyung
                Kim, Miyoung Yun, Won-Ik Kim,
                Sungkyung Kim, Hyun Lee, Chulsik
                Yoon, Kwangjae Lim
                ETRI


    Re:         Call for Comments on the 802.16n AWD

    Abstract    This provides AWD text proposals for frame structure of talk-around direct communications

    Purpose     To be discussed and adopted by 802.16 TGn
                This document does not represent the agreed views of the IEEE 802.16 Working Group or any of its subgroups. It
    Notice      represents only the views of the participants listed in the “Source(s)” field above. It is offered as a basis for
                discussion. It is not binding on the contributor(s), who reserve(s) the right to add, amend or withdraw material
                contained herein.
                The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution,
    Release     and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name
                any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole
                discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The
                contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.16.
                The contributor is familiar with the IEEE-SA Patent Policy and Procedures:
    Patent                <http://standards.ieee.org/guides/bylaws/sect6-7.html#6> and
    Policy                <http://standards.ieee.org/guides/opman/sect6.html#6.3>.
                Further information is located at <http://standards.ieee.org/board/pat/pat-material.html> and
                <http://standards.ieee.org/board/pat>.
1




                                                                 1
                                                                                                        IEEE C802.16n-11/0152r1


 1           Frame Structure and Resource Segmentation for Talk-around Direct
 2                                  Communications
 3                                    Young-Ho Jung, Jihoon Choi
 4                                    Korea Aerospace University
 5     Sungcheol Chang, Seokki Kim, Eunkyung Kim, Miyoung Yun, Won-Ik Kim, Sungkyung Kim, Hyun
 6                                  Lee, Chulsik Yoon, Kwangjae Lim
 7                                                ETRI
 8

 9   1. Introductions
10      To support direct communication in IEEE 802.16n, some dedicated resources can be assigned as described in
11   [1]. By dedicatedly reserving a part of communication resources for infra-structure communications, the
12   reserved resources are used to provide multiple pairs of direct communication in OFDMA (orthogonal
13   frequency division multiple access) manner with contention based transmission. In the current version of the
14   IEEE 802.16n AWD [2], resources and frame structures for TDC (talk-around direct communication) are
15   described based on the text proposal suggested in [3], however, some additions and changes are required to
16   improve the degree of completion.
17      This contribution provides AWD text proposals of resource segmentation and frame structure for 16n TDC.
18   In this contribution, “Common Direct Mode Zone Extended (CDMZ-E)” is newly defined, and frame structures
19   for CDMZ-E and Cell Specific Direct Mode Zone (CSDMZ) are proposed. In addition, frame structures for
20   CDMZ are revised to support VOIP packets more efficiently.
21

22   2. References
23   [1] IEEE C802.16n-11/0051r2, “Dedicated resources allocation for direct communications in IEEE 802.16n,” March 2011.
24   [2] IEEE 802.16n-11/0015, “802.16n Amendment Working Draft,” August 2011.
25   [3] IEEE C802.16n-11/0130r1, “Frame structure for talk-around direct communications,” July 2011.
26

27   3. Proposed Text for the 802.16n Amendment Working Document (AWD)
28   Note:
29   The text in BLACK color: the existing text in the 802.16n Amendment Draft Standard
30   The text in RED color: the removal of existing 802.16n Amendment Draft Standard Text
31   The text in BLUE color: the new text added to the 802.16n Amendment Draft Standard Text
32
33   [-------------------------------------------------Start of Text Proposal---------------------------------------------------]

34   [Remedy1: Adapt the following change in Section 17.3.2.6 in the 802.16n AWD]
35   17.3.2.6 Talk-around Direct Communication
36   [note: This contribution provides text proposals for the following sections:

                                                                     2
                                                                                       IEEE C802.16n-11/0152r1

 1   17.3.2.6.2 Physical layer
 2   17.3.2.6.2.1 Frame structure]
 3
 4   17.3.2.6.2.1 Frame structure
 5   17.3.2.6.2.1.1 Resources for talk-around direct communication
 6     For talk-around direct communication, two types of infra-structure communication resources are dedicatedly
 7   assigned:
 8     -   Common Direct Mode Zone (CDMZ): set of PRUs in the uplink infra-structure communication resources
 9         with fixed size and positions which are commonly assigned to all cells (must be CRU)
10     -   Common Direct Mode Zone Extended (CDMZ-E): set of PRUs in the downlink infra-structure
11         communication resources with fixed size and positions which are commonly assigned to all cells (must be
12         CRU)
13     -   Cell Specific Direct Mode Zone (CSDMZ): additionally assigned direct-mode resource blocks
14         independently assigned by each HR-BS (CRU or DRU) and information to receive cell specific direct
15         mode region can be obtained from common direct mode zone
16      Figure 912 shows an example of talk-around direct communication resource allocation. In the figure, some
17   part of uplink infra structure resources are assigned for CDMZcommon direct mode zone, some part of
18   downlink infra-structure resources are assigned for CDMZ-E, and some part of uplink and downlink infra
19   structure communication resources are assigned for CDMZcell specific direct mode zone. By assigning the
20   same physical resources for common direct mode zoneCDMZ and CDMZ-E the following benefits can be
21   obtained:
22     -   Reduce the overhead of control channels to transmit allocation information of resources for direct-mode
23         communication
24     -   Reduce the computation complexity and power to obtain synchronization for direct communication,
25         specially for the HR-MSs in the outside of HR-BS coverage




                                                           3
                                                                                      IEEE C802.16n-11/0152r1




 1




 2
 3
 4                  Figure 912. An example of talk-around direct communication resource allocation
 5
 6      The highest four PRUs of uplink resources are assigned for Common Direct Mode Zone (CDMZ). For FFT
 7   size = 512, PRU 20, 21, 22, 23 are assigned for CDMZ, for FFT size = 1024, PRU 44, 45, 46, 47 are assigned
 8   for CDMZ, and for FFT size = 2048, PRU 92, 93, 94, 95 are assigned for CDMZ. The highest four PRUs of
 9   downlink resources are assigned for Common Direct Mode Zone Extended(CDMZ-E). For FFT size = 512,
10   PRU 20, 21, 22, 23 are assigned for CDMZ-E, for FFT size = 1024, PRU 44, 45, 46, 47 are assigned for
                                                         4
                                                                                       IEEE C802.16n-11/0152r1

 1   CDMZ-E, and for FFT size = 2048, PRU 92, 93, 94, 95 are assigned for CDMZ-E. The resources for Cell
 2   Specific Direct Mode Zone (CSDMZ) are multiple of four PRUs, and determined by each HR-BS
 3   independently and the assignment information is transmitted in the CDMZ.
 4
 5   17.3.2.6.2.1.2 Frame structure for CDMZ
 6       Logical frame of common direct mode zoneCDMZ is composed by collecting all resources of CDMZ in a
 7   superframe as shown in Figure 913. In the example, there are three uplink subframes for each 5msec frame.
 8   Frame structure of cell specific direct mode zone is extension of common direct mode frame structure and the
 9   details are FFS.




10
11




12
13                    Figure 913. An example of common direct mode logical frame construction
14
15     There are three physical channels for CDMZtalk-around direct communication:
16     -   Synchronization Channel (Sync-CH)
17     -   Dedicated Channel(Ded-CH)

                                                          5
                                                                                            IEEE C802.16n-11/0152r1

 1     -   Supplementary Channel(Sup-CH)
 2
 3      The first subframe of the common direct modeCDMZ logical frame is occupied by synchronization channel.
 4   All the HR-MSs receives the synchronization signal on the Synchronization channelSync-CH except HR-MSs
 5   transmitting the synchronization signalsSync-CH. The HR-MSs are synchronized to the received
 6   synchronization signal if the signal timing has priority to HR-MS’s synchronization timing itself. The details of
 7   timing priority is FFS. Some HR-MSs sends the synchronization signal on the Sync-CHhronization channel at
 8   selected subframes. HR-MS selects its slots for sending synchronization timing in distributed way. The details
 9   of how to select is FFS. The synchronization channel is composed of two parts: synchronization channel
10   preamble part (P-SCH1) and synchronization message part (P-SCH2). The synchronization channel preamble
11   part is used for acquiring time and frequency synchronization, and synchronization sequence part is used for
12   transmitting SYNC-CH IE which includes some information including frame structure information, hop count,
13   transmitter ID et. al. The detailed design of synchronization channel is described in 17.3.2.6.2.2.17.3.2.6.2.3.1
14      Resources excluding the first subframe assigned for Sync-CHsynchronization channel are assigned for Ded-
15   CHdedicated channels and Sup-CHsupplementary channels. If there are Nsubframe_per_fame subframes in a 5ms
16   frame, (Nsubframe_per_fame +1)-th subframe and (3Nsubframe_per_fame +1)-th subframe are assigned for Sup-CH and the
17   other resources are assigned for Ded-CH.
18      A dDedicated channel is a physical channel resource to send direct communication packets for two HR-MSs
19   or a group of HR-MSs. An HR-MS sends a packet on one or more than one dedicated subchannels of dedicated
20   channel and the other HR-MSs receives the packet on it. If two HR-MSs and a group of HR-MSs are involved,
21   the transmissions are unicast and multicast, respectively. How to configure the resource of dedicated channel is
22   discussed in described in 17.3.2.6.2.3.2. The resources for dedicated channel is divided into small size sub-
23   blocks (mRB: mini-Resource Block), as shown in Figure 914. One mRB is composed of 6 subcarriers-by-6
24   OFDM symbols, and there are 12 mRBs for each subframe (4PRU/ 1/3 PRU = 12). In the figure 914, mRB i-j
25   denotes j-th mRB in the i-th subframe. A dedicated subchannel is composed of a collection of 9 12 mRBs                Formatted: Underline, Font color:
26   distributed across the entire frequency region in the slot.                                                           Custom Color(RGB(0,0,204))




                                                             6
                                                                                                                                                                IEEE C802.16n-11/0152r1

                                                        Super frame                                      Super frame                    Super frame


                                                            CDMZ                                          CDMZ                          CDMZ                     CDMZ




                                                                             Slot 1                                                          Slot 2
                                                                                                                                                                 subframe
                                                                m-tile 1
                                                 mRB     mRB                 mRB      mRB
                                                                m-tile 2
                                                 2-1     3-1    m-tile 3     5-1      6-1                                                     time
                                                                m-tile 4
                                                 mRB     mRB                 mRB      mRB
                                                                                                                       frequency
                                                                m-tile 5
                                                 2-2     3-2                 5-2      6-2
                                                                m-tile 6
                                                                m-tile 7
                                                 mRB     mRB                 mRB      mRB
                                                                m-tile 8
                                                 2-3     3-3    m-tile 9     5-3      6-3
                                                                m-tile 10
                                                 mRB     mRB                 mRB      mRB
                                                                m-tile 11
                                                 2-4     3-4    m-tile 12    5-4      6-4

                                                 mRB
                                                 2-5
                                                         mRB
                                                         3-5
                                                                m-tile 13
                                                                m-tile 14
                                                                             mRB
                                                                             5-5
                                                                                      mRB
                                                                                      6-5                     …
            Sync-CH_sequence




                                                                m-tile 15
                               Sync-CH_message




                                                                m-tile 16
                                                 mRB     mRB                 mRB      mRB
                                                                m-tile 17
                                                 2-6     3-6    m-tile 18    5-6      6-6
                                                                m-tile 19
                                                 mRB     mRB                 mRB      mRB
                                                                m-tile 20
                                                 2-7     3-7    m-tile 21    5-7      6-7

                                                 mRB     mRB
                                                                m-tile 22
                                                                             mRB      mRB
                                                                                                                                   mRB (mini-resource block)
                                                                m-tile 23
                                                 2-8     3-8                 5-8      6-8
                                                                m-tile 24
                                                 mRB     mRB
                                                                m-tile 25
                                                                             mRB      mRB                                                    time
                                                                m-tile 26
                                                 2-9     3-9    m-tile 27    5-9      6-9
                                                                                                                       frequency




                                                                m-tile 28
                                                 mRB     mRB                 mRB      mRB
                                                                m-tile 29
                                                 2-10    3-10   m-tile 30    5-10     6-10
                                                                m-tile 31
                                                 mRB     mRB                 mRB      mRB
                                                                m-tile 32
                                                 2-11    3-11                5-11     6-11
                                                                m-tile 33
                                                 mRB     mRB
                                                                m-tile 34
                                                                             mRB      mRB
                                                                                                                                       m-tile (mini-tile)
                                                                m-tile 35
                                                 2-12    3-12                5-12     6-12
1                                                               m-tile 36



                                                  Super frame                                    Super frame                            Super frame


                                                         CDMZ                                            CDMZ                           CDMZ                     CDMZ




                                                                            Slot 1                                                             Slot 2
                                                                                                                                                                     subframe
                                      mRB           mRB     mRB        mRB          mRB
                                      2-3           3-3     4-3        5-3          6-3
                                      mRB           mRB     mRB        mRB          mRB                               time
                                      2-4           3-4     4-4        5-4          6-4
                                                                                             frequency




                                      mRB           mRB     mRB        mRB          mRB
                                                                                                                                                              time
                                      2-5           3-5     4-5        5-5          6-5
    Sync-Ch preamble
    Sync-Ch message




                                      mRB           mRB     mRB        mRB          mRB
                                                                                                                                           frequency




                                      2-6           3-6     4-6        5-6          6-6
                                      mRB           mRB     mRB        mRB          mRB
                                      2-7           3-7     4-7        5-7          6-7

                                                                                             …
                                      mRB           mRB     mRB        mRB          mRB
                                      2-8           3-8     4-8        5-8          6-8
                                      mRB           mRB     mRB        mRB          mRB
                                      2-9           3-9     4-9        5-9          6-9                                                                     half-mRB
                                      mRB           mRB     mRB        mRB          mRB
                                      2-10          3-10    4-10       5-10         6-10                 mRB (mini-resource block)
                                      mRB           mRB     mRB        mRB          mRB
                                      2-11          3-11    4-11       5-11         6-11
                                      mRB           mRB     mRB        mRB          mRB
                                      2-12          3-12    4-12       5-12         6-12
2
                                                                                                                  7
                                                                                         IEEE C802.16n-11/0152r1

 1   Figure 914. An example of common direct mode zoneCDMZ resource segmentation and construction of mRBs
 2                                 and m-tiles (3 UL subframes/ 5msec frame)
 3
 4     A supplementary sub-channel is one-to-one mapped with each a dedicated sub-channel. As shown in Figure
 5   913, Sup-CH for Ded-CH in slot 1 is located in slot 2, and Sup-CH for Ded-CH in slot 2 is located in slot 1. By
 6   using the supplementary sub-channel, the following indication of MAC message transmissions, PHY signalings
 7   and short feedback messages related with the corresponding dedicated subchannel are transmitted.
 8      - MAC messages: indication of MAC messages e.g. RTS, CTS for corresponding dedicated subchannel, MCS
 9   information, ranging response et. al.
10     - PHY signalings: periodic ranging sequence, sounding signal et. al.
11     - Short feedback messages: ACK, NACK, CQI, CSI, RI (rank information) et. al.
12
13      An subframe mRB for supplementary sub-channel is divided into 36 mini-tiles divided into two half-mRB as
14   shown in Figure 914, and a mini-tile half mRB is composed of 23 subcarriers-by- 5 OFDM symbols. Since all
15   HR-MSs should listen the supplementary channels, to obtain Tx. And Rx. Switching time, no signal is
16   transmitted in the last OFDM symbol of supplementary channel (6th OFDM symbol). The details of Sup-
17   CHsupplementary channel design are discussed in described in 17.3.2.6.2.417.3.2.6.2.3.3.
18
19   17.3.2.6.2.1.3 Frame structure for CDMZ-E and CSDMZ
20      The frame structure for CDMZ-E and CSDMZ is an extension of the frame structure of CDMZ. The only
21   difference is that there is no Sync-CH in the CDMZ-E and CSDMZ. As shown in Figure xxx, The first subframe
22   is assigned for Ded-CH. If 4 more than four PRUs are assigned for CSDMZ (multiples of 4), a CSDMZ frame is
23   composed by four PRUs in the UL or DL resources, and there are multiple CSDMZ frames. For example, if
24   eight DL PRUs and four UL PRUs are assigned for CSDMZ, there are two CSDMZ frames in the DL resources,
25   and one CSDMZ frame in the UL resource.
26




                                                            8
                                                                                                                              IEEE C802.16n-11/0152r1

                                       Super frame                       Super frame                       Super frame


                                         CDMZ-E or                       CDMZ-E or                       CDMZ-E or               CDMZ-E or
                                          CSDMZ                           CSDMZ                           CSDMZ                   CSDMZ




                                                           Slot 1                                             Slot 2
                                                                                                                                   subframe
                                               m-tile 1
                         mRB    mRB     mRB                mRB    mRB
                                               m-tile 2
                         1-1    2-1     3-1    m-tile 3
                                                           5-1    6-1                                         time
                                               m-tile 4
                                                                                       frequency
                         mRB    mRB     mRB                mRB    mRB
                                               m-tile 5
                         1-2    2-2     3-2    m-tile 6
                                                           5-2    6-2
                                               m-tile 7
                         mRB    mRB     mRB                mRB    mRB
                                               m-tile 8
                         1-3    2-3     3-3    m-tile 9
                                                           5-3    6-3
                                               m-tile 10
                         mRB    mRB     mRB                mRB    mRB
                                               m-tile 11
                         1-4    2-4     3-4                5-4    6-4

                                                                               …
                                               m-tile 12
                                               m-tile 13
                         mRB    mRB     mRB                mRB    mRB
                                               m-tile 14
                         1-5    2-5     3-5    m-tile 15
                                                           5-5    6-5
                                               m-tile 16
                         mRB    mRB     mRB                mRB    mRB
                                               m-tile 17
                         1-6    2-6     3-6    m-tile 18
                                                           5-6    6-6
                                               m-tile 19
                         mRB    mRB     mRB                mRB    mRB
                                               m-tile 20
                         1-7    2-7     3-7                5-7    6-7
                                               m-tile 21
                                               m-tile 22
                                                                                                     mRB (mini-resource block)
                         mRB    mRB     mRB                mRB    mRB
                                               m-tile 23
                         1-8    2-8     3-8    m-tile 24
                                                           5-8    6-8
                                               m-tile 25                                                      time
                         mRB    mRB     mRB                mRB    mRB
                                               m-tile 26
                         1-9    2-9     3-9                5-9    6-9
                                                                                       frequency




                                               m-tile 27
                                               m-tile 28
                         mRB    mRB     mRB                mRB    mRB
                                               m-tile 29
                         1-10   2-10    3-10   m-tile 30
                                                           5-10   6-10
                                               m-tile 31
                         mRB    mRB     mRB                mRB    mRB
                                               m-tile 32
                         1-11   2-11    3-11               5-11   6-11
                                               m-tile 33                                                 m-tile (mini-tile)
                                               m-tile 34
                         mRB    mRB     mRB                mRB    mRB
                                               m-tile 35
                         1-12   2-12    3-12               5-12   6-12
 1                                             m-tile 36



 2   Figure xxx. An example of CDMZ-E or CSDMZ resource segmentation and construction of mRBs and m-tiles
 3                                      (3 UL subframes/ 5msec frame)
 4
 5   17.3.2.6.2.1.4 Construction of dedicated subchannels for each TDC frame
 6      For a TDC frame, if there are Nsubframe_per_fame subframes in a 5ms frame, a logical TDC frame is composed of
 7   4Nsubframe_per_fame subframes, and resources for Ded-CH are divided into dedicated subchannels. The number of
 8   dedicated subchannels in slot 1 and 2 are summarized in the Table aaa, and Table bbb. A dedicated subchannel
 9   is composed of 12 mRBs distributed across the entire four PRUs in the slot.
10     Table aaa. The number of dedicated sub-channels according to Nsubframe_per_fame (CDMZ)
                                                      The number of dedicated                      The number of dedicated           Total number of
             Nsubframe_per_fame                       sub-channels in the slot 1                   sub-channels in the slot 2     dedicated sub-channels
                                                           (Nded-subchannel,1)                          (Nded-subchannel,2)            (Nded-subframe)
                     2                                             2                                            3                            5
                     3                                             4                                            5                            9
                     4                                             6                                            7                           13
                     5                                             8                                            9                           17
11

                                                                                 9
                                                                                                                                        IEEE C802.16n-11/0152r1

 1      Table bbb. The number of dedicated sub-channels according to Nsubframe_per_fame (CDMZ-E and CSDMZ)
                                                              The number of dedicated                          The number of dedicated         Total number of
                    Nsubframe_per_fame                        sub-channels in the slot 1                       sub-channels in the slot 2   dedicated sub-channels
                                                                   (Nded-subchannel,1)                              (Nded-subchannel,2)          (Nded-subframe)
                            2                                              3                                                3                          6
                            3                                              5                                                5                         10
                            4                                              7                                                7                         14
                            5                                              9                                                9                         18
 2
 3      mRBs for each dedicated subframe are assigned by the following assignment method:
 4      -Step 1: For each slot 12 successive mRBs are temporally assigned from subframe 1 to subframe Nded-subframe,1
 5   in slot 1, and from subframe Nded-subchannel,1+1 to subframe Nded-subchannel,1 + Nded-subchannel,2 in slot 2, in time first manner.
 6     -Step 2: For each subframe mRBs are permuted by using the permutation sequence generated by using the
 7   method in 16.3.4.3.3 with parameters of M=12, and SEED = 343*subframe index.
 8
 9      Figure xyx shows an example of mRB assignment for dedicated subchannels, when Nsubframe_per_fame = 3, Nded-
10           = 4, and Nded-subframe,2=5.
     subchannel,1

11
                                                                                 Subframe index
                                                               1             2      3     4       5        6   7   8    9    10   11   12
                                                     1                       1      1             1        1   5   5    5         5    5

                                                     2                       1      1             1        1   5   5    5         5    5
                                         mRB index




                                                     3                       1      1             1        1   5   5    6         6    6

                                                     4                       2      2             2        2   6   6    6         6    6

                                                     5                       2      2             2        2   6   6    6         6    7
                                                          Sync-CH sequence
                                                          Sync-CH message




                                                     6                       2      2             2        2   7   7    7         7    7

                                                     7                       3      3             3        3   7   7    7         7    7

                                                     8                       3      3             3        3   7   8    8         8    8

                                                     9                       3      3             3        3   8   8    8         8    8

                                                     10                      4      4             4        4   8   8    8         9    9

                                                     11                      4      4             4        4   9   9    9         9    9

                                                     12                      4      4             4        4   9   9    9         9    9


12                                                                                      Step 1: temporal assignment




                                                                                                      10
                                                                                                                 IEEE C802.16n-11/0152r1

                                               1             2   3     4    5   6     7   8   9   10   11   12
                                     1                       3   2          1   4     5   8   8        7    7

                                     2                       4   3          4   1     6   7   9        9    6

                                     3                       2   4          2   1     9   6   6        8    5

                                     4                       4   3          2   1     5   8   7        9    7

                                     5                       2   1          3   2     6   9   7        5    5
                                          Sync-CH sequence
                                          Sync-CH message




                                     6                       4   1          1   3     5   6   8        5    7

                                     7                       3   4          3   2     7   9   6        6    9

                                     8                       1   4          3   4     7   7   5        9    8

                                     9                       2   1          2   4     8   5   6        7    8

                                     10                      3   3          4   3     8   5   5        6    6

                                     11                      1   2          4   2     7   8   9        8    9

                                     12                      1   2          1   3     9   5   8        6    9


 1                                                                   Step 2: permutation in the subframe

 2      Figure xyx. An example of mRB assignment for supplementary subchannels when Nsubframe_per_fame = 3, Nded-
 3                                        subchannel,1 = 4, and Nded-subchannel,2=5.

 4
 5     17.3.2.6.2.1.5 Construction of supplementary subchannels for each TDC frame
 6      There are 36 mini-tiles for supplementary subchannels. For the n-th supplementary subchannel corresponding                         Formatted: Font: Italic
 7   to the n-th dedicated subchannel, four mini-tiles with indices of mod(mini-tile index-1, 9)+1 = mod(subchannel                        Formatted: Font: Italic
 8   indexn-1, 9)+1 in the different slot are assigned. For example, the 5-th supplementary subchannel is composed
                                                                                                                                           Formatted: Font: Italic
 9   of mini-tile 5, 14, 23, and 32, and the 12-th supplementary subchannel is composed of mini-tile. 3, 12, 21, and
10   30.
11
12    [-------------------------------------------------End of Text Proposal----------------------------------------------------]




                                                                                 11

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:10
posted:10/3/2012
language:English
pages:11