Activision explains Call of Duty: Black Ops 2 Public Matchmaking working

Activision has detailed exactly how Call of Duty: Black Ops 2 public matchmaking system works. The publisher explained via following steps are how “Call of Duty: Black Ops 2” filters all matches to players during the matchmaking process.

Call of Duty: Black Ops IICheck out the complete details below.

  1. Filter all games that can be joined by proximity to the player.
    Proximity does not adhere strictly to city, state or country as seen on
    a map. Rather, it breaks down into four tiers of geographical region
    surrounding the player. The query starts in the tier closest to the
    player and expands from there if it cannot find enough matches. The
    query also ignores all full or “non-joinable” games, which could be half
    or more of the total available games in a playlist.
  2. Filter by broad skill range. This step
    takes the proximity-filtered list and narrows it further to the set of
    games that fall roughly in the same broad skill range. This is very
    loose criteria in Public Match and is a broad-stroke filter that avoids
    games at the extreme ends. A player of very high skill should generally not get matched to games where the average skill of players is very low, and vice versa.
  3. Steps 1 and 2 normally take a fraction of a second and result in a
    list of “top 50” available games. From here, the game tests for the best connection quality
    of those 50 games. Connection quality includes a measure of ping,
    bandwidth between you and the host, and NAT compatibility. The game
    attempts to join you to the game with the best connection quality of all
    possible matches, starting at the top of the list.

Treyarch's David Vonderhaar also confirmed that Black Ops 2 gamers can set their their match search functionality to "Search to Best and play in high-traffic playlists."

This setting will search for fatest match rather than best connection. Here are other reason why Black Ops II players might experience poor connection issue in Black Ops 2.

  • The first is your local network connection quality which itself
    is determined by a number of variables. If the quality of your network
    doesn’t meet minimum criteria, the matchmaking won’t matter – the game cannot control variables that are general aspects of internet connectivity.
    For steps on improving your local connection quality, see the article
    on decreasing lag. Here are some factors that can decrease your quality
    of network service:

    • Low bandwidth to the internet due to ISP bandwidth limits.
    • High bandwidth usage by other services in your home (video/audio streaming or high-volume concurrent downloads, for example).
    • Your local home network has restrictive NAT settings.
    • You are playing the game over a WIFI connection rather than wired Ethernet.
    • Your ISP is throttling data throughput from your location. Some ISPs erroneously
      flag online games as “spam” and will throttle the speed at which data
      can transfer in and out of those games. If you experience consistently
      laggy games or games that lag during the same time periods every day and
      there are no other problems with your home network, check with your ISP
      to ensure that they aren’t throttling specific types of data.
  • The second variable is your region. If you live in a remote region,
    it will be more difficult to find hosted games that match your profile.
    The best option for those in extremely remote regions is to play during
    local peak hours in playlists with high player counts.
  • The third variable is time of day. Since matchmaking works to find
    the game with the best connection quality, it will have a much easier
    time finding high quality connections when there are more players online
    in your area. As a general rule, peak usage occurs during the late
    afternoon and evening hours in each time zone.
  • One last variable to be aware of is DLC. DLC map packs divide
    matchmaking pools into groups of players who have DLC and players who
    don’t have DLC. The more map packs that are released, the more
    matchmaking pools there are. Nine months after the initial launch of the
    game, for example, the highest single population of players is that
    which owns all map packs.
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